3075 lines
105 KiB
C
3075 lines
105 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include <errno.h>
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#include <fcntl.h>
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#include <fnmatch.h>
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#include <getopt.h>
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#include <glob.h>
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#include <limits.h>
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#include <linux/fs.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/xattr.h>
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#include <sysexits.h>
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#include <time.h>
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#include <unistd.h>
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#include "sd-path.h"
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#include "acl-util.h"
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#include "alloc-util.h"
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#include "btrfs-util.h"
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#include "capability-util.h"
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#include "chattr-util.h"
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#include "conf-files.h"
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#include "copy.h"
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#include "def.h"
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#include "dirent-util.h"
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#include "escape.h"
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#include "fd-util.h"
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#include "fileio.h"
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#include "format-util.h"
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#include "fs-util.h"
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#include "glob-util.h"
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#include "io-util.h"
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#include "label.h"
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#include "log.h"
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#include "macro.h"
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#include "missing.h"
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#include "mkdir.h"
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#include "mount-util.h"
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#include "pager.h"
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#include "parse-util.h"
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#include "path-lookup.h"
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#include "path-util.h"
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#include "rm-rf.h"
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#include "selinux-util.h"
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#include "set.h"
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#include "specifier.h"
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#include "stat-util.h"
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#include "stdio-util.h"
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#include "string-table.h"
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#include "string-util.h"
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#include "strv.h"
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#include "terminal-util.h"
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#include "umask-util.h"
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#include "user-util.h"
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#include "util.h"
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/* This reads all files listed in /etc/tmpfiles.d/?*.conf and creates
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* them in the file system. This is intended to be used to create
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* properly owned directories beneath /tmp, /var/tmp, /run, which are
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* volatile and hence need to be recreated on bootup. */
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typedef enum ItemType {
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/* These ones take file names */
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CREATE_FILE = 'f',
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TRUNCATE_FILE = 'F',
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CREATE_DIRECTORY = 'd',
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TRUNCATE_DIRECTORY = 'D',
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CREATE_SUBVOLUME = 'v',
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CREATE_SUBVOLUME_INHERIT_QUOTA = 'q',
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CREATE_SUBVOLUME_NEW_QUOTA = 'Q',
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CREATE_FIFO = 'p',
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CREATE_SYMLINK = 'L',
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CREATE_CHAR_DEVICE = 'c',
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CREATE_BLOCK_DEVICE = 'b',
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COPY_FILES = 'C',
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/* These ones take globs */
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WRITE_FILE = 'w',
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EMPTY_DIRECTORY = 'e',
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SET_XATTR = 't',
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RECURSIVE_SET_XATTR = 'T',
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SET_ACL = 'a',
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RECURSIVE_SET_ACL = 'A',
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SET_ATTRIBUTE = 'h',
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RECURSIVE_SET_ATTRIBUTE = 'H',
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IGNORE_PATH = 'x',
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IGNORE_DIRECTORY_PATH = 'X',
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REMOVE_PATH = 'r',
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RECURSIVE_REMOVE_PATH = 'R',
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RELABEL_PATH = 'z',
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RECURSIVE_RELABEL_PATH = 'Z',
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ADJUST_MODE = 'm', /* legacy, 'z' is identical to this */
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} ItemType;
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typedef struct Item {
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ItemType type;
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char *path;
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char *argument;
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char **xattrs;
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#if HAVE_ACL
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acl_t acl_access;
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acl_t acl_default;
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#endif
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uid_t uid;
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gid_t gid;
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mode_t mode;
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usec_t age;
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dev_t major_minor;
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unsigned attribute_value;
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unsigned attribute_mask;
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bool uid_set:1;
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bool gid_set:1;
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bool mode_set:1;
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bool age_set:1;
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bool mask_perms:1;
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bool attribute_set:1;
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bool keep_first_level:1;
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bool force:1;
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bool done:1;
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} Item;
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typedef struct ItemArray {
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Item *items;
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size_t count;
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size_t size;
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} ItemArray;
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typedef enum DirectoryType {
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DIRECTORY_RUNTIME = 0,
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DIRECTORY_STATE,
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DIRECTORY_CACHE,
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DIRECTORY_LOGS,
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_DIRECTORY_TYPE_MAX,
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} DirectoryType;
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static bool arg_cat_config = false;
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static bool arg_user = false;
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static bool arg_create = false;
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static bool arg_clean = false;
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static bool arg_remove = false;
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static bool arg_boot = false;
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static bool arg_no_pager = false;
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static char **arg_include_prefixes = NULL;
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static char **arg_exclude_prefixes = NULL;
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static char *arg_root = NULL;
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static char *arg_replace = NULL;
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#define MAX_DEPTH 256
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static OrderedHashmap *items = NULL, *globs = NULL;
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static Set *unix_sockets = NULL;
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static int specifier_machine_id_safe(char specifier, void *data, void *userdata, char **ret);
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static int specifier_directory(char specifier, void *data, void *userdata, char **ret);
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static const Specifier specifier_table[] = {
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{ 'm', specifier_machine_id_safe, NULL },
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{ 'b', specifier_boot_id, NULL },
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{ 'H', specifier_host_name, NULL },
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{ 'v', specifier_kernel_release, NULL },
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{ 'U', specifier_user_id, NULL },
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{ 'u', specifier_user_name, NULL },
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{ 'h', specifier_user_home, NULL },
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{ 't', specifier_directory, UINT_TO_PTR(DIRECTORY_RUNTIME) },
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{ 'S', specifier_directory, UINT_TO_PTR(DIRECTORY_STATE) },
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{ 'C', specifier_directory, UINT_TO_PTR(DIRECTORY_CACHE) },
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{ 'L', specifier_directory, UINT_TO_PTR(DIRECTORY_LOGS) },
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{ 'T', specifier_tmp_dir, NULL },
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{ 'V', specifier_var_tmp_dir, NULL },
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{}
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};
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static int specifier_machine_id_safe(char specifier, void *data, void *userdata, char **ret) {
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int r;
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/* If /etc/machine_id is missing or empty (e.g. in a chroot environment)
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* return a recognizable error so that the caller can skip the rule
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* gracefully. */
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r = specifier_machine_id(specifier, data, userdata, ret);
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if (IN_SET(r, -ENOENT, -ENOMEDIUM))
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return -ENXIO;
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return r;
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}
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static int specifier_directory(char specifier, void *data, void *userdata, char **ret) {
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struct table_entry {
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uint64_t type;
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const char *suffix;
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};
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static const struct table_entry paths_system[] = {
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[DIRECTORY_RUNTIME] = { SD_PATH_SYSTEM_RUNTIME },
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[DIRECTORY_STATE] = { SD_PATH_SYSTEM_STATE_PRIVATE },
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[DIRECTORY_CACHE] = { SD_PATH_SYSTEM_STATE_CACHE },
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[DIRECTORY_LOGS] = { SD_PATH_SYSTEM_STATE_LOGS },
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};
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static const struct table_entry paths_user[] = {
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[DIRECTORY_RUNTIME] = { SD_PATH_USER_RUNTIME },
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[DIRECTORY_STATE] = { SD_PATH_USER_CONFIGURATION },
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[DIRECTORY_CACHE] = { SD_PATH_USER_STATE_CACHE },
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[DIRECTORY_LOGS] = { SD_PATH_USER_CONFIGURATION, "log" },
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};
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unsigned i;
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const struct table_entry *paths;
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assert_cc(ELEMENTSOF(paths_system) == ELEMENTSOF(paths_user));
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paths = arg_user ? paths_user : paths_system;
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i = PTR_TO_UINT(data);
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assert(i < ELEMENTSOF(paths_system));
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return sd_path_home(paths[i].type, paths[i].suffix, ret);
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}
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static int log_unresolvable_specifier(const char *filename, unsigned line) {
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static bool notified = false;
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/* In system mode, this is called when /etc is not fully initialized (e.g.
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* in a chroot environment) where some specifiers are unresolvable. In user
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* mode, this is called when some variables are not defined. These cases are
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* not considered as an error so log at LOG_NOTICE only for the first time
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* and then downgrade this to LOG_DEBUG for the rest. */
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log_full(notified ? LOG_DEBUG : LOG_NOTICE,
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"[%s:%u] Failed to resolve specifier: %s, skipping",
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filename, line,
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arg_user ? "Required $XDG_... variable not defined" : "uninitialized /etc detected");
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if (!notified)
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log_notice("All rules containing unresolvable specifiers will be skipped.");
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notified = true;
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return 0;
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}
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static int user_config_paths(char*** ret) {
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_cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL;
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_cleanup_free_ char *persistent_config = NULL, *runtime_config = NULL, *data_home = NULL;
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_cleanup_strv_free_ char **res = NULL;
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int r;
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r = xdg_user_dirs(&config_dirs, &data_dirs);
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if (r < 0)
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return r;
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r = xdg_user_config_dir(&persistent_config, "/user-tmpfiles.d");
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if (r < 0 && r != -ENXIO)
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return r;
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r = xdg_user_runtime_dir(&runtime_config, "/user-tmpfiles.d");
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if (r < 0 && r != -ENXIO)
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return r;
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r = xdg_user_data_dir(&data_home, "/user-tmpfiles.d");
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if (r < 0 && r != -ENXIO)
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return r;
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r = strv_extend_strv_concat(&res, config_dirs, "/user-tmpfiles.d");
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if (r < 0)
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return r;
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r = strv_extend(&res, persistent_config);
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if (r < 0)
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return r;
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r = strv_extend(&res, runtime_config);
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if (r < 0)
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return r;
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r = strv_extend(&res, data_home);
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if (r < 0)
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return r;
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r = strv_extend_strv_concat(&res, data_dirs, "/user-tmpfiles.d");
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if (r < 0)
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return r;
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r = path_strv_make_absolute_cwd(res);
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if (r < 0)
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return r;
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*ret = TAKE_PTR(res);
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return 0;
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}
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static bool needs_glob(ItemType t) {
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return IN_SET(t,
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WRITE_FILE,
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IGNORE_PATH,
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IGNORE_DIRECTORY_PATH,
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REMOVE_PATH,
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RECURSIVE_REMOVE_PATH,
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EMPTY_DIRECTORY,
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ADJUST_MODE,
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RELABEL_PATH,
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RECURSIVE_RELABEL_PATH,
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SET_XATTR,
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RECURSIVE_SET_XATTR,
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SET_ACL,
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RECURSIVE_SET_ACL,
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SET_ATTRIBUTE,
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RECURSIVE_SET_ATTRIBUTE);
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}
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static bool takes_ownership(ItemType t) {
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return IN_SET(t,
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CREATE_FILE,
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TRUNCATE_FILE,
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CREATE_DIRECTORY,
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EMPTY_DIRECTORY,
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TRUNCATE_DIRECTORY,
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CREATE_SUBVOLUME,
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CREATE_SUBVOLUME_INHERIT_QUOTA,
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CREATE_SUBVOLUME_NEW_QUOTA,
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CREATE_FIFO,
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CREATE_SYMLINK,
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CREATE_CHAR_DEVICE,
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CREATE_BLOCK_DEVICE,
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COPY_FILES,
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WRITE_FILE,
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IGNORE_PATH,
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IGNORE_DIRECTORY_PATH,
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REMOVE_PATH,
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RECURSIVE_REMOVE_PATH);
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}
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static struct Item* find_glob(OrderedHashmap *h, const char *match) {
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ItemArray *j;
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Iterator i;
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ORDERED_HASHMAP_FOREACH(j, h, i) {
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unsigned n;
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for (n = 0; n < j->count; n++) {
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Item *item = j->items + n;
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if (fnmatch(item->path, match, FNM_PATHNAME|FNM_PERIOD) == 0)
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return item;
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}
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}
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return NULL;
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}
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static void load_unix_sockets(void) {
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_cleanup_fclose_ FILE *f = NULL;
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int r;
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if (unix_sockets)
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return;
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/* We maintain a cache of the sockets we found in /proc/net/unix to speed things up a little. */
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unix_sockets = set_new(&path_hash_ops);
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if (!unix_sockets) {
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log_oom();
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return;
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}
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f = fopen("/proc/net/unix", "re");
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if (!f) {
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log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, errno,
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"Failed to open /proc/net/unix, ignoring: %m");
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goto fail;
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}
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/* Skip header */
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r = read_line(f, LONG_LINE_MAX, NULL);
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if (r < 0) {
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log_warning_errno(r, "Failed to skip /proc/net/unix header line: %m");
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goto fail;
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}
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if (r == 0) {
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log_warning("Premature end of file reading /proc/net/unix.");
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goto fail;
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}
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for (;;) {
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_cleanup_free_ char *line = NULL;
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char *p, *s;
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r = read_line(f, LONG_LINE_MAX, &line);
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if (r < 0) {
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log_warning_errno(r, "Failed to read /proc/net/unix line, ignoring: %m");
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goto fail;
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}
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if (r == 0) /* EOF */
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break;
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p = strchr(line, ':');
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if (!p)
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continue;
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if (strlen(p) < 37)
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continue;
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p += 37;
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p += strspn(p, WHITESPACE);
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p += strcspn(p, WHITESPACE); /* skip one more word */
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p += strspn(p, WHITESPACE);
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if (*p != '/')
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continue;
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s = strdup(p);
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if (!s) {
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log_oom();
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goto fail;
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}
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path_simplify(s, false);
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r = set_consume(unix_sockets, s);
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if (r < 0 && r != -EEXIST) {
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log_warning_errno(r, "Failed to add AF_UNIX socket to set, ignoring: %m");
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goto fail;
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}
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}
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return;
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fail:
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unix_sockets = set_free_free(unix_sockets);
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}
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static bool unix_socket_alive(const char *fn) {
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assert(fn);
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load_unix_sockets();
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if (unix_sockets)
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return !!set_get(unix_sockets, (char*) fn);
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/* We don't know, so assume yes */
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return true;
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}
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|
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static int dir_is_mount_point(DIR *d, const char *subdir) {
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int mount_id_parent, mount_id;
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int r_p, r;
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r_p = name_to_handle_at_loop(dirfd(d), ".", NULL, &mount_id_parent, 0);
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if (r_p < 0)
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r_p = -errno;
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r = name_to_handle_at_loop(dirfd(d), subdir, NULL, &mount_id, 0);
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if (r < 0)
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r = -errno;
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|
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/* got no handle; make no assumptions, return error */
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if (r_p < 0 && r < 0)
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return r_p;
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|
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/* got both handles; if they differ, it is a mount point */
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if (r_p >= 0 && r >= 0)
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return mount_id_parent != mount_id;
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|
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/* got only one handle; assume different mount points if one
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* of both queries was not supported by the filesystem */
|
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if (IN_SET(r_p, -ENOSYS, -EOPNOTSUPP) || IN_SET(r, -ENOSYS, -EOPNOTSUPP))
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return true;
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|
|
/* return error */
|
|
if (r_p < 0)
|
|
return r_p;
|
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return r;
|
|
}
|
|
|
|
static DIR* xopendirat_nomod(int dirfd, const char *path) {
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DIR *dir;
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|
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dir = xopendirat(dirfd, path, O_NOFOLLOW|O_NOATIME);
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if (dir)
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return dir;
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|
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log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path);
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if (errno != EPERM)
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return NULL;
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|
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dir = xopendirat(dirfd, path, O_NOFOLLOW);
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if (!dir)
|
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log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path);
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|
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return dir;
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}
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|
|
static DIR* opendir_nomod(const char *path) {
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return xopendirat_nomod(AT_FDCWD, path);
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|
}
|
|
|
|
static int dir_cleanup(
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|
Item *i,
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|
const char *p,
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DIR *d,
|
|
const struct stat *ds,
|
|
usec_t cutoff,
|
|
dev_t rootdev,
|
|
bool mountpoint,
|
|
int maxdepth,
|
|
bool keep_this_level) {
|
|
|
|
struct dirent *dent;
|
|
struct timespec times[2];
|
|
bool deleted = false;
|
|
int r = 0;
|
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|
|
FOREACH_DIRENT_ALL(dent, d, break) {
|
|
struct stat s;
|
|
usec_t age;
|
|
_cleanup_free_ char *sub_path = NULL;
|
|
|
|
if (dot_or_dot_dot(dent->d_name))
|
|
continue;
|
|
|
|
if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) {
|
|
if (errno == ENOENT)
|
|
continue;
|
|
|
|
/* FUSE, NFS mounts, SELinux might return EACCES */
|
|
r = log_full_errno(errno == EACCES ? LOG_DEBUG : LOG_ERR, errno,
|
|
"stat(%s/%s) failed: %m", p, dent->d_name);
|
|
continue;
|
|
}
|
|
|
|
/* Stay on the same filesystem */
|
|
if (s.st_dev != rootdev) {
|
|
log_debug("Ignoring \"%s/%s\": different filesystem.", p, dent->d_name);
|
|
continue;
|
|
}
|
|
|
|
/* Try to detect bind mounts of the same filesystem instance; they
|
|
* do not differ in device major/minors. This type of query is not
|
|
* supported on all kernels or filesystem types though. */
|
|
if (S_ISDIR(s.st_mode) && dir_is_mount_point(d, dent->d_name) > 0) {
|
|
log_debug("Ignoring \"%s/%s\": different mount of the same filesystem.",
|
|
p, dent->d_name);
|
|
continue;
|
|
}
|
|
|
|
sub_path = strjoin(p, "/", dent->d_name);
|
|
if (!sub_path) {
|
|
r = log_oom();
|
|
goto finish;
|
|
}
|
|
|
|
/* Is there an item configured for this path? */
|
|
if (ordered_hashmap_get(items, sub_path)) {
|
|
log_debug("Ignoring \"%s\": a separate entry exists.", sub_path);
|
|
continue;
|
|
}
|
|
|
|
if (find_glob(globs, sub_path)) {
|
|
log_debug("Ignoring \"%s\": a separate glob exists.", sub_path);
|
|
continue;
|
|
}
|
|
|
|
if (S_ISDIR(s.st_mode)) {
|
|
|
|
if (mountpoint &&
|
|
streq(dent->d_name, "lost+found") &&
|
|
s.st_uid == 0) {
|
|
log_debug("Ignoring \"%s\".", sub_path);
|
|
continue;
|
|
}
|
|
|
|
if (maxdepth <= 0)
|
|
log_warning("Reached max depth on \"%s\".", sub_path);
|
|
else {
|
|
_cleanup_closedir_ DIR *sub_dir;
|
|
int q;
|
|
|
|
sub_dir = xopendirat_nomod(dirfd(d), dent->d_name);
|
|
if (!sub_dir) {
|
|
if (errno != ENOENT)
|
|
r = log_error_errno(errno, "opendir(%s) failed: %m", sub_path);
|
|
|
|
continue;
|
|
}
|
|
|
|
q = dir_cleanup(i, sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1, false);
|
|
if (q < 0)
|
|
r = q;
|
|
}
|
|
|
|
/* Note: if you are wondering why we don't
|
|
* support the sticky bit for excluding
|
|
* directories from cleaning like we do it for
|
|
* other file system objects: well, the sticky
|
|
* bit already has a meaning for directories,
|
|
* so we don't want to overload that. */
|
|
|
|
if (keep_this_level) {
|
|
log_debug("Keeping \"%s\".", sub_path);
|
|
continue;
|
|
}
|
|
|
|
/* Ignore ctime, we change it when deleting */
|
|
age = timespec_load(&s.st_mtim);
|
|
if (age >= cutoff) {
|
|
char a[FORMAT_TIMESTAMP_MAX];
|
|
/* Follows spelling in stat(1). */
|
|
log_debug("Directory \"%s\": modify time %s is too new.",
|
|
sub_path,
|
|
format_timestamp_us(a, sizeof(a), age));
|
|
continue;
|
|
}
|
|
|
|
age = timespec_load(&s.st_atim);
|
|
if (age >= cutoff) {
|
|
char a[FORMAT_TIMESTAMP_MAX];
|
|
log_debug("Directory \"%s\": access time %s is too new.",
|
|
sub_path,
|
|
format_timestamp_us(a, sizeof(a), age));
|
|
continue;
|
|
}
|
|
|
|
log_debug("Removing directory \"%s\".", sub_path);
|
|
if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0)
|
|
if (!IN_SET(errno, ENOENT, ENOTEMPTY))
|
|
r = log_error_errno(errno, "rmdir(%s): %m", sub_path);
|
|
|
|
} else {
|
|
/* Skip files for which the sticky bit is
|
|
* set. These are semantics we define, and are
|
|
* unknown elsewhere. See XDG_RUNTIME_DIR
|
|
* specification for details. */
|
|
if (s.st_mode & S_ISVTX) {
|
|
log_debug("Skipping \"%s\": sticky bit set.", sub_path);
|
|
continue;
|
|
}
|
|
|
|
if (mountpoint && S_ISREG(s.st_mode))
|
|
if (s.st_uid == 0 && STR_IN_SET(dent->d_name,
|
|
".journal",
|
|
"aquota.user",
|
|
"aquota.group")) {
|
|
log_debug("Skipping \"%s\".", sub_path);
|
|
continue;
|
|
}
|
|
|
|
/* Ignore sockets that are listed in /proc/net/unix */
|
|
if (S_ISSOCK(s.st_mode) && unix_socket_alive(sub_path)) {
|
|
log_debug("Skipping \"%s\": live socket.", sub_path);
|
|
continue;
|
|
}
|
|
|
|
/* Ignore device nodes */
|
|
if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode)) {
|
|
log_debug("Skipping \"%s\": a device.", sub_path);
|
|
continue;
|
|
}
|
|
|
|
/* Keep files on this level around if this is
|
|
* requested */
|
|
if (keep_this_level) {
|
|
log_debug("Keeping \"%s\".", sub_path);
|
|
continue;
|
|
}
|
|
|
|
age = timespec_load(&s.st_mtim);
|
|
if (age >= cutoff) {
|
|
char a[FORMAT_TIMESTAMP_MAX];
|
|
/* Follows spelling in stat(1). */
|
|
log_debug("File \"%s\": modify time %s is too new.",
|
|
sub_path,
|
|
format_timestamp_us(a, sizeof(a), age));
|
|
continue;
|
|
}
|
|
|
|
age = timespec_load(&s.st_atim);
|
|
if (age >= cutoff) {
|
|
char a[FORMAT_TIMESTAMP_MAX];
|
|
log_debug("File \"%s\": access time %s is too new.",
|
|
sub_path,
|
|
format_timestamp_us(a, sizeof(a), age));
|
|
continue;
|
|
}
|
|
|
|
age = timespec_load(&s.st_ctim);
|
|
if (age >= cutoff) {
|
|
char a[FORMAT_TIMESTAMP_MAX];
|
|
log_debug("File \"%s\": change time %s is too new.",
|
|
sub_path,
|
|
format_timestamp_us(a, sizeof(a), age));
|
|
continue;
|
|
}
|
|
|
|
log_debug("unlink \"%s\"", sub_path);
|
|
|
|
if (unlinkat(dirfd(d), dent->d_name, 0) < 0)
|
|
if (errno != ENOENT)
|
|
r = log_error_errno(errno, "unlink(%s): %m", sub_path);
|
|
|
|
deleted = true;
|
|
}
|
|
}
|
|
|
|
finish:
|
|
if (deleted) {
|
|
usec_t age1, age2;
|
|
char a[FORMAT_TIMESTAMP_MAX], b[FORMAT_TIMESTAMP_MAX];
|
|
|
|
/* Restore original directory timestamps */
|
|
times[0] = ds->st_atim;
|
|
times[1] = ds->st_mtim;
|
|
|
|
age1 = timespec_load(&ds->st_atim);
|
|
age2 = timespec_load(&ds->st_mtim);
|
|
log_debug("Restoring access and modification time on \"%s\": %s, %s",
|
|
p,
|
|
format_timestamp_us(a, sizeof(a), age1),
|
|
format_timestamp_us(b, sizeof(b), age2));
|
|
if (futimens(dirfd(d), times) < 0)
|
|
log_error_errno(errno, "utimensat(%s): %m", p);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static bool dangerous_hardlinks(void) {
|
|
_cleanup_free_ char *value = NULL;
|
|
static int cached = -1;
|
|
int r;
|
|
|
|
/* Check whether the fs.protected_hardlinks sysctl is on. If we can't determine it we assume its off, as that's
|
|
* what the upstream default is. */
|
|
|
|
if (cached >= 0)
|
|
return cached;
|
|
|
|
r = read_one_line_file("/proc/sys/fs/protected_hardlinks", &value);
|
|
if (r < 0) {
|
|
log_debug_errno(r, "Failed to read fs.protected_hardlinks sysctl: %m");
|
|
return true;
|
|
}
|
|
|
|
r = parse_boolean(value);
|
|
if (r < 0) {
|
|
log_debug_errno(r, "Failed to parse fs.protected_hardlinks sysctl: %m");
|
|
return true;
|
|
}
|
|
|
|
cached = r == 0;
|
|
return cached;
|
|
}
|
|
|
|
static bool hardlink_vulnerable(const struct stat *st) {
|
|
assert(st);
|
|
|
|
return !S_ISDIR(st->st_mode) && st->st_nlink > 1 && dangerous_hardlinks();
|
|
}
|
|
|
|
static int fd_set_perms(Item *i, int fd, const struct stat *st) {
|
|
_cleanup_free_ char *path = NULL;
|
|
struct stat stbuf;
|
|
int r;
|
|
|
|
assert(i);
|
|
assert(fd);
|
|
|
|
r = fd_get_path(fd, &path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (!i->mode_set && !i->uid_set && !i->gid_set)
|
|
goto shortcut;
|
|
|
|
if (!st) {
|
|
if (fstat(fd, &stbuf) < 0)
|
|
return log_error_errno(errno, "fstat(%s) failed: %m", path);
|
|
st = &stbuf;
|
|
}
|
|
|
|
if (hardlink_vulnerable(st)) {
|
|
log_error("Refusing to set permissions on hardlinked file %s while the fs.protected_hardlinks sysctl is turned off.", path);
|
|
return -EPERM;
|
|
}
|
|
|
|
if (i->mode_set) {
|
|
if (S_ISLNK(st->st_mode))
|
|
log_debug("Skipping mode fix for symlink %s.", path);
|
|
else {
|
|
mode_t m = i->mode;
|
|
|
|
if (i->mask_perms) {
|
|
if (!(st->st_mode & 0111))
|
|
m &= ~0111;
|
|
if (!(st->st_mode & 0222))
|
|
m &= ~0222;
|
|
if (!(st->st_mode & 0444))
|
|
m &= ~0444;
|
|
if (!S_ISDIR(st->st_mode))
|
|
m &= ~07000; /* remove sticky/sgid/suid bit, unless directory */
|
|
}
|
|
|
|
if (m == (st->st_mode & 07777))
|
|
log_debug("\"%s\" has correct mode %o already.", path, st->st_mode);
|
|
else {
|
|
log_debug("Changing \"%s\" to mode %o.", path, m);
|
|
if (fchmod_opath(fd, m) < 0)
|
|
return log_error_errno(errno, "fchmod() of %s failed: %m", path);
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((i->uid_set && i->uid != st->st_uid) ||
|
|
(i->gid_set && i->gid != st->st_gid)) {
|
|
log_debug("Changing \"%s\" to owner "UID_FMT":"GID_FMT,
|
|
path,
|
|
i->uid_set ? i->uid : UID_INVALID,
|
|
i->gid_set ? i->gid : GID_INVALID);
|
|
|
|
if (fchownat(fd,
|
|
"",
|
|
i->uid_set ? i->uid : UID_INVALID,
|
|
i->gid_set ? i->gid : GID_INVALID,
|
|
AT_EMPTY_PATH) < 0)
|
|
return log_error_errno(errno, "fchownat() of %s failed: %m", path);
|
|
}
|
|
|
|
shortcut:
|
|
return label_fix(path, 0);
|
|
}
|
|
|
|
static int path_open_parent_safe(const char *path) {
|
|
_cleanup_free_ char *dn = NULL;
|
|
int fd;
|
|
|
|
if (path_equal(path, "/") || !path_is_normalized(path)) {
|
|
log_error("Failed to open parent of '%s': invalid path.", path);
|
|
return -EINVAL;
|
|
}
|
|
|
|
dn = dirname_malloc(path);
|
|
if (!dn)
|
|
return log_oom();
|
|
|
|
fd = chase_symlinks(dn, NULL, CHASE_OPEN|CHASE_SAFE, NULL);
|
|
if (fd == -EPERM)
|
|
return log_error_errno(fd, "Unsafe symlinks encountered in %s, refusing.", path);
|
|
if (fd < 0)
|
|
return log_error_errno(fd, "Failed to validate path %s: %m", path);
|
|
|
|
return fd;
|
|
}
|
|
|
|
static int path_set_perms(Item *i, const char *path) {
|
|
_cleanup_close_ int fd = -1;
|
|
struct stat stbuf, *st = NULL;
|
|
|
|
assert(i);
|
|
assert(path);
|
|
|
|
fd = open(path, O_NOFOLLOW|O_CLOEXEC|O_PATH);
|
|
if (fd < 0) {
|
|
int level = LOG_ERR, r = -errno;
|
|
|
|
/* Option "e" operates only on existing objects. Do not
|
|
* print errors about non-existent files or directories */
|
|
if (i->type == EMPTY_DIRECTORY && errno == ENOENT) {
|
|
level = LOG_DEBUG;
|
|
r = 0;
|
|
}
|
|
|
|
log_full_errno(level, errno, "Adjusting owner and mode for %s failed: %m", path);
|
|
return r;
|
|
}
|
|
|
|
if (i->type == EMPTY_DIRECTORY) {
|
|
/* FIXME: introduce fd_is_dir() helper ? */
|
|
if (fstat(fd, &stbuf) < 0)
|
|
return log_error_errno(errno, "Failed to fstat() file %s: %m", path);
|
|
|
|
if (!S_ISDIR(stbuf.st_mode)) {
|
|
log_error("'%s' already exists and is not a directory. ", path);
|
|
return -EEXIST;
|
|
}
|
|
|
|
st = &stbuf;
|
|
}
|
|
|
|
return fd_set_perms(i, fd, st);
|
|
}
|
|
|
|
static int parse_xattrs_from_arg(Item *i) {
|
|
const char *p;
|
|
int r;
|
|
|
|
assert(i);
|
|
assert(i->argument);
|
|
|
|
p = i->argument;
|
|
|
|
for (;;) {
|
|
_cleanup_free_ char *name = NULL, *value = NULL, *xattr = NULL;
|
|
|
|
r = extract_first_word(&p, &xattr, NULL, EXTRACT_QUOTES|EXTRACT_CUNESCAPE);
|
|
if (r < 0)
|
|
log_warning_errno(r, "Failed to parse extended attribute '%s', ignoring: %m", p);
|
|
if (r <= 0)
|
|
break;
|
|
|
|
r = split_pair(xattr, "=", &name, &value);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Failed to parse extended attribute, ignoring: %s", xattr);
|
|
continue;
|
|
}
|
|
|
|
if (isempty(name) || isempty(value)) {
|
|
log_warning("Malformed extended attribute found, ignoring: %s", xattr);
|
|
continue;
|
|
}
|
|
|
|
if (strv_push_pair(&i->xattrs, name, value) < 0)
|
|
return log_oom();
|
|
|
|
name = value = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fd_set_xattrs(Item *i, int fd, const struct stat *st) {
|
|
char procfs_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
|
|
_cleanup_free_ char *path = NULL;
|
|
char **name, **value;
|
|
int r;
|
|
|
|
assert(i);
|
|
assert(fd);
|
|
|
|
r = fd_get_path(fd, &path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
xsprintf(procfs_path, "/proc/self/fd/%i", fd);
|
|
|
|
STRV_FOREACH_PAIR(name, value, i->xattrs) {
|
|
log_debug("Setting extended attribute '%s=%s' on %s.", *name, *value, path);
|
|
if (setxattr(procfs_path, *name, *value, strlen(*value), 0) < 0)
|
|
return log_error_errno(errno, "Setting extended attribute %s=%s on %s failed: %m",
|
|
*name, *value, path);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int path_set_xattrs(Item *i, const char *path) {
|
|
_cleanup_close_ int fd = -1;
|
|
|
|
assert(i);
|
|
assert(path);
|
|
|
|
fd = open(path, O_CLOEXEC|O_NOFOLLOW|O_PATH);
|
|
if (fd < 0)
|
|
return log_error_errno(errno, "Cannot open '%s': %m", path);
|
|
|
|
return fd_set_xattrs(i, fd, NULL);
|
|
}
|
|
|
|
static int parse_acls_from_arg(Item *item) {
|
|
#if HAVE_ACL
|
|
int r;
|
|
|
|
assert(item);
|
|
|
|
/* If force (= modify) is set, we will not modify the acl
|
|
* afterwards, so the mask can be added now if necessary. */
|
|
|
|
r = parse_acl(item->argument, &item->acl_access, &item->acl_default, !item->force);
|
|
if (r < 0)
|
|
log_warning_errno(r, "Failed to parse ACL \"%s\": %m. Ignoring", item->argument);
|
|
#else
|
|
log_warning_errno(ENOSYS, "ACLs are not supported. Ignoring");
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if HAVE_ACL
|
|
static int path_set_acl(const char *path, const char *pretty, acl_type_t type, acl_t acl, bool modify) {
|
|
_cleanup_(acl_free_charpp) char *t = NULL;
|
|
_cleanup_(acl_freep) acl_t dup = NULL;
|
|
int r;
|
|
|
|
/* Returns 0 for success, positive error if already warned,
|
|
* negative error otherwise. */
|
|
|
|
if (modify) {
|
|
r = acls_for_file(path, type, acl, &dup);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = calc_acl_mask_if_needed(&dup);
|
|
if (r < 0)
|
|
return r;
|
|
} else {
|
|
dup = acl_dup(acl);
|
|
if (!dup)
|
|
return -errno;
|
|
|
|
/* the mask was already added earlier if needed */
|
|
}
|
|
|
|
r = add_base_acls_if_needed(&dup, path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
t = acl_to_any_text(dup, NULL, ',', TEXT_ABBREVIATE);
|
|
log_debug("Setting %s ACL %s on %s.",
|
|
type == ACL_TYPE_ACCESS ? "access" : "default",
|
|
strna(t), pretty);
|
|
|
|
r = acl_set_file(path, type, dup);
|
|
if (r < 0)
|
|
/* Return positive to indicate we already warned */
|
|
return -log_error_errno(errno,
|
|
"Setting %s ACL \"%s\" on %s failed: %m",
|
|
type == ACL_TYPE_ACCESS ? "access" : "default",
|
|
strna(t), pretty);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int fd_set_acls(Item *item, int fd, const struct stat *st) {
|
|
int r = 0;
|
|
#if HAVE_ACL
|
|
char procfs_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
|
|
_cleanup_free_ char *path = NULL;
|
|
struct stat stbuf;
|
|
|
|
assert(item);
|
|
assert(fd);
|
|
|
|
r = fd_get_path(fd, &path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (!st) {
|
|
if (fstat(fd, &stbuf) < 0)
|
|
return log_error_errno(errno, "fstat(%s) failed: %m", path);
|
|
st = &stbuf;
|
|
}
|
|
|
|
if (hardlink_vulnerable(st)) {
|
|
log_error("Refusing to set ACLs on hardlinked file %s while the fs.protected_hardlinks sysctl is turned off.", path);
|
|
return -EPERM;
|
|
}
|
|
|
|
if (S_ISLNK(st->st_mode)) {
|
|
log_debug("Skipping ACL fix for symlink %s.", path);
|
|
return 0;
|
|
}
|
|
|
|
xsprintf(procfs_path, "/proc/self/fd/%i", fd);
|
|
|
|
if (item->acl_access)
|
|
r = path_set_acl(procfs_path, path, ACL_TYPE_ACCESS, item->acl_access, item->force);
|
|
|
|
/* set only default acls to folders */
|
|
if (r == 0 && item->acl_default && S_ISDIR(st->st_mode))
|
|
r = path_set_acl(procfs_path, path, ACL_TYPE_DEFAULT, item->acl_default, item->force);
|
|
|
|
if (r > 0)
|
|
return -r; /* already warned */
|
|
if (r == -EOPNOTSUPP) {
|
|
log_debug_errno(r, "ACLs not supported by file system at %s", path);
|
|
return 0;
|
|
}
|
|
if (r < 0)
|
|
return log_error_errno(r, "ACL operation on \"%s\" failed: %m", path);
|
|
#endif
|
|
return r;
|
|
}
|
|
|
|
static int path_set_acls(Item *item, const char *path) {
|
|
int r = 0;
|
|
#if HAVE_ACL
|
|
_cleanup_close_ int fd = -1;
|
|
|
|
assert(item);
|
|
assert(path);
|
|
|
|
fd = open(path, O_NOFOLLOW|O_CLOEXEC|O_PATH);
|
|
if (fd < 0)
|
|
return log_error_errno(errno, "Adjusting ACL of %s failed: %m", path);
|
|
|
|
r = fd_set_acls(item, fd, NULL);
|
|
#endif
|
|
return r;
|
|
}
|
|
|
|
#define ATTRIBUTES_ALL \
|
|
(FS_NOATIME_FL | \
|
|
FS_SYNC_FL | \
|
|
FS_DIRSYNC_FL | \
|
|
FS_APPEND_FL | \
|
|
FS_COMPR_FL | \
|
|
FS_NODUMP_FL | \
|
|
FS_EXTENT_FL | \
|
|
FS_IMMUTABLE_FL | \
|
|
FS_JOURNAL_DATA_FL | \
|
|
FS_SECRM_FL | \
|
|
FS_UNRM_FL | \
|
|
FS_NOTAIL_FL | \
|
|
FS_TOPDIR_FL | \
|
|
FS_NOCOW_FL)
|
|
|
|
static int parse_attribute_from_arg(Item *item) {
|
|
|
|
static const struct {
|
|
char character;
|
|
unsigned value;
|
|
} attributes[] = {
|
|
{ 'A', FS_NOATIME_FL }, /* do not update atime */
|
|
{ 'S', FS_SYNC_FL }, /* Synchronous updates */
|
|
{ 'D', FS_DIRSYNC_FL }, /* dirsync behaviour (directories only) */
|
|
{ 'a', FS_APPEND_FL }, /* writes to file may only append */
|
|
{ 'c', FS_COMPR_FL }, /* Compress file */
|
|
{ 'd', FS_NODUMP_FL }, /* do not dump file */
|
|
{ 'e', FS_EXTENT_FL }, /* Extents */
|
|
{ 'i', FS_IMMUTABLE_FL }, /* Immutable file */
|
|
{ 'j', FS_JOURNAL_DATA_FL }, /* Reserved for ext3 */
|
|
{ 's', FS_SECRM_FL }, /* Secure deletion */
|
|
{ 'u', FS_UNRM_FL }, /* Undelete */
|
|
{ 't', FS_NOTAIL_FL }, /* file tail should not be merged */
|
|
{ 'T', FS_TOPDIR_FL }, /* Top of directory hierarchies */
|
|
{ 'C', FS_NOCOW_FL }, /* Do not cow file */
|
|
};
|
|
|
|
enum {
|
|
MODE_ADD,
|
|
MODE_DEL,
|
|
MODE_SET
|
|
} mode = MODE_ADD;
|
|
|
|
unsigned value = 0, mask = 0;
|
|
const char *p;
|
|
|
|
assert(item);
|
|
|
|
p = item->argument;
|
|
if (p) {
|
|
if (*p == '+') {
|
|
mode = MODE_ADD;
|
|
p++;
|
|
} else if (*p == '-') {
|
|
mode = MODE_DEL;
|
|
p++;
|
|
} else if (*p == '=') {
|
|
mode = MODE_SET;
|
|
p++;
|
|
}
|
|
}
|
|
|
|
if (isempty(p) && mode != MODE_SET) {
|
|
log_error("Setting file attribute on '%s' needs an attribute specification.", item->path);
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (; p && *p ; p++) {
|
|
unsigned i, v;
|
|
|
|
for (i = 0; i < ELEMENTSOF(attributes); i++)
|
|
if (*p == attributes[i].character)
|
|
break;
|
|
|
|
if (i >= ELEMENTSOF(attributes)) {
|
|
log_error("Unknown file attribute '%c' on '%s'.", *p, item->path);
|
|
return -EINVAL;
|
|
}
|
|
|
|
v = attributes[i].value;
|
|
|
|
SET_FLAG(value, v, IN_SET(mode, MODE_ADD, MODE_SET));
|
|
|
|
mask |= v;
|
|
}
|
|
|
|
if (mode == MODE_SET)
|
|
mask |= ATTRIBUTES_ALL;
|
|
|
|
assert(mask != 0);
|
|
|
|
item->attribute_mask = mask;
|
|
item->attribute_value = value;
|
|
item->attribute_set = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fd_set_attribute(Item *item, int fd, const struct stat *st) {
|
|
_cleanup_close_ int procfs_fd = -1;
|
|
_cleanup_free_ char *path = NULL;
|
|
struct stat stbuf;
|
|
unsigned f;
|
|
int r;
|
|
|
|
if (!item->attribute_set || item->attribute_mask == 0)
|
|
return 0;
|
|
|
|
r = fd_get_path(fd, &path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (!st) {
|
|
if (fstat(fd, &stbuf) < 0)
|
|
return log_error_errno(errno, "fstat(%s) failed: %m", path);
|
|
st = &stbuf;
|
|
}
|
|
|
|
/* Issuing the file attribute ioctls on device nodes is not
|
|
* safe, as that will be delivered to the drivers, not the
|
|
* file system containing the device node. */
|
|
if (!S_ISREG(st->st_mode) && !S_ISDIR(st->st_mode)) {
|
|
log_error("Setting file flags is only supported on regular files and directories, cannot set on '%s'.", path);
|
|
return -EINVAL;
|
|
}
|
|
|
|
f = item->attribute_value & item->attribute_mask;
|
|
|
|
/* Mask away directory-specific flags */
|
|
if (!S_ISDIR(st->st_mode))
|
|
f &= ~FS_DIRSYNC_FL;
|
|
|
|
procfs_fd = fd_reopen(fd, O_RDONLY|O_CLOEXEC|O_NOATIME);
|
|
if (procfs_fd < 0)
|
|
return -errno;
|
|
|
|
r = chattr_fd(procfs_fd, f, item->attribute_mask);
|
|
if (r < 0)
|
|
log_full_errno(IN_SET(r, -ENOTTY, -EOPNOTSUPP) ? LOG_DEBUG : LOG_WARNING,
|
|
r,
|
|
"Cannot set file attribute for '%s', value=0x%08x, mask=0x%08x: %m",
|
|
path, item->attribute_value, item->attribute_mask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int path_set_attribute(Item *item, const char *path) {
|
|
_cleanup_close_ int fd = -1;
|
|
|
|
if (!item->attribute_set || item->attribute_mask == 0)
|
|
return 0;
|
|
|
|
fd = open(path, O_CLOEXEC|O_NOFOLLOW|O_PATH);
|
|
if (fd < 0)
|
|
return log_error_errno(errno, "Cannot open '%s': %m", path);
|
|
|
|
return fd_set_attribute(item, fd, NULL);
|
|
}
|
|
|
|
static int write_one_file(Item *i, const char *path) {
|
|
_cleanup_close_ int fd = -1, dir_fd = -1;
|
|
char *bn;
|
|
int r;
|
|
|
|
assert(i);
|
|
assert(path);
|
|
assert(i->argument);
|
|
assert(i->type == WRITE_FILE);
|
|
|
|
/* Validate the path and keep the fd on the directory for opening the
|
|
* file so we're sure that it can't be changed behind our back. */
|
|
dir_fd = path_open_parent_safe(path);
|
|
if (dir_fd < 0)
|
|
return dir_fd;
|
|
|
|
bn = basename(path);
|
|
|
|
/* Follows symlinks */
|
|
fd = openat(dir_fd, bn, O_NONBLOCK|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode);
|
|
if (fd < 0) {
|
|
if (errno == ENOENT) {
|
|
log_debug_errno(errno, "Not writing missing file \"%s\": %m", path);
|
|
return 0;
|
|
}
|
|
return log_error_errno(errno, "Failed to open file \"%s\": %m", path);
|
|
}
|
|
|
|
/* 'w' is allowed to write into any kind of files. */
|
|
log_debug("Writing to \"%s\".", path);
|
|
|
|
r = loop_write(fd, i->argument, strlen(i->argument), false);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to write file \"%s\": %m", path);
|
|
|
|
return fd_set_perms(i, fd, NULL);
|
|
}
|
|
|
|
static int create_file(Item *i, const char *path) {
|
|
_cleanup_close_ int fd = -1, dir_fd = -1;
|
|
struct stat stbuf, *st = NULL;
|
|
int r = 0;
|
|
char *bn;
|
|
|
|
assert(i);
|
|
assert(path);
|
|
assert(i->type == CREATE_FILE);
|
|
|
|
/* 'f' operates on regular files exclusively. */
|
|
|
|
/* Validate the path and keep the fd on the directory for opening the
|
|
* file so we're sure that it can't be changed behind our back. */
|
|
dir_fd = path_open_parent_safe(path);
|
|
if (dir_fd < 0)
|
|
return dir_fd;
|
|
|
|
bn = basename(path);
|
|
|
|
RUN_WITH_UMASK(0000) {
|
|
mac_selinux_create_file_prepare(path, S_IFREG);
|
|
fd = openat(dir_fd, bn, O_CREAT|O_EXCL|O_NOFOLLOW|O_NONBLOCK|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode);
|
|
mac_selinux_create_file_clear();
|
|
}
|
|
|
|
if (fd < 0) {
|
|
/* Even on a read-only filesystem, open(2) returns EEXIST if the
|
|
* file already exists. It returns EROFS only if it needs to
|
|
* create the file. */
|
|
if (errno != EEXIST)
|
|
return log_error_errno(errno, "Failed to create file %s: %m", path);
|
|
|
|
/* Re-open the file. At that point it must exist since open(2)
|
|
* failed with EEXIST. We still need to check if the perms/mode
|
|
* need to be changed. For read-only filesystems, we let
|
|
* fd_set_perms() report the error if the perms need to be
|
|
* modified. */
|
|
fd = openat(dir_fd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH, i->mode);
|
|
if (fd < 0)
|
|
return log_error_errno(errno, "Failed to re-open file %s: %m", path);
|
|
|
|
if (fstat(fd, &stbuf) < 0)
|
|
return log_error_errno(errno, "stat(%s) failed: %m", path);
|
|
|
|
if (!S_ISREG(stbuf.st_mode)) {
|
|
log_error("%s exists and is not a regular file.", path);
|
|
return -EEXIST;
|
|
}
|
|
|
|
st = &stbuf;
|
|
} else {
|
|
|
|
log_debug("\"%s\" has been created.", path);
|
|
|
|
if (i->argument) {
|
|
log_debug("Writing to \"%s\".", path);
|
|
|
|
r = loop_write(fd, i->argument, strlen(i->argument), false);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to write file \"%s\": %m", path);
|
|
}
|
|
}
|
|
|
|
return fd_set_perms(i, fd, st);
|
|
}
|
|
|
|
static int truncate_file(Item *i, const char *path) {
|
|
_cleanup_close_ int fd = -1, dir_fd = -1;
|
|
struct stat stbuf, *st = NULL;
|
|
bool erofs = false;
|
|
int r = 0;
|
|
char *bn;
|
|
|
|
assert(i);
|
|
assert(path);
|
|
assert(i->type == TRUNCATE_FILE);
|
|
|
|
/* We want to operate on regular file exclusively especially since
|
|
* O_TRUNC is unspecified if the file is neither a regular file nor a
|
|
* fifo nor a terminal device. Therefore we first open the file and make
|
|
* sure it's a regular one before truncating it. */
|
|
|
|
/* Validate the path and keep the fd on the directory for opening the
|
|
* file so we're sure that it can't be changed behind our back. */
|
|
dir_fd = path_open_parent_safe(path);
|
|
if (dir_fd < 0)
|
|
return dir_fd;
|
|
|
|
bn = basename(path);
|
|
|
|
RUN_WITH_UMASK(0000) {
|
|
mac_selinux_create_file_prepare(path, S_IFREG);
|
|
fd = openat(dir_fd, bn, O_CREAT|O_NOFOLLOW|O_NONBLOCK|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode);
|
|
mac_selinux_create_file_clear();
|
|
}
|
|
|
|
if (fd < 0) {
|
|
if (errno != EROFS)
|
|
return log_error_errno(errno, "Failed to open/create file %s: %m", path);
|
|
|
|
/* On a read-only filesystem, we don't want to fail if the
|
|
* target is already empty and the perms are set. So we still
|
|
* proceed with the sanity checks and let the remaining
|
|
* operations fail with EROFS if they try to modify the target
|
|
* file. */
|
|
|
|
fd = openat(dir_fd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH, i->mode);
|
|
if (fd < 0) {
|
|
if (errno == ENOENT) {
|
|
log_error("Cannot create file %s on a read-only file system.", path);
|
|
return -EROFS;
|
|
}
|
|
|
|
return log_error_errno(errno, "Failed to re-open file %s: %m", path);
|
|
}
|
|
|
|
erofs = true;
|
|
}
|
|
|
|
if (fstat(fd, &stbuf) < 0)
|
|
return log_error_errno(errno, "stat(%s) failed: %m", path);
|
|
|
|
if (!S_ISREG(stbuf.st_mode)) {
|
|
log_error("%s exists and is not a regular file.", path);
|
|
return -EEXIST;
|
|
}
|
|
|
|
if (stbuf.st_size > 0) {
|
|
if (ftruncate(fd, 0) < 0) {
|
|
r = erofs ? -EROFS : -errno;
|
|
return log_error_errno(r, "Failed to truncate file %s: %m", path);
|
|
}
|
|
} else
|
|
st = &stbuf;
|
|
|
|
log_debug("\"%s\" has been created.", path);
|
|
|
|
if (i->argument) {
|
|
log_debug("Writing to \"%s\".", path);
|
|
|
|
r = loop_write(fd, i->argument, strlen(i->argument), false);
|
|
if (r < 0) {
|
|
r = erofs ? -EROFS : r;
|
|
return log_error_errno(r, "Failed to write file %s: %m", path);
|
|
}
|
|
}
|
|
|
|
return fd_set_perms(i, fd, st);
|
|
}
|
|
|
|
static int copy_files(Item *i) {
|
|
_cleanup_close_ int dfd = -1, fd = -1;
|
|
char *bn;
|
|
int r;
|
|
|
|
log_debug("Copying tree \"%s\" to \"%s\".", i->argument, i->path);
|
|
|
|
bn = basename(i->path);
|
|
|
|
/* Validate the path and use the returned directory fd for copying the
|
|
* target so we're sure that the path can't be changed behind our
|
|
* back. */
|
|
dfd = path_open_parent_safe(i->path);
|
|
if (dfd < 0)
|
|
return dfd;
|
|
|
|
r = copy_tree_at(AT_FDCWD, i->argument,
|
|
dfd, bn,
|
|
i->uid_set ? i->uid : UID_INVALID,
|
|
i->gid_set ? i->gid : GID_INVALID,
|
|
COPY_REFLINK);
|
|
if (r < 0) {
|
|
struct stat a, b;
|
|
|
|
/* If the target already exists on read-only filesystems, trying
|
|
* to create the target will not fail with EEXIST but with
|
|
* EROFS. */
|
|
if (r == -EROFS && faccessat(dfd, bn, F_OK, AT_SYMLINK_NOFOLLOW) == 0)
|
|
r = -EEXIST;
|
|
|
|
if (r != -EEXIST)
|
|
return log_error_errno(r, "Failed to copy files to %s: %m", i->path);
|
|
|
|
if (stat(i->argument, &a) < 0)
|
|
return log_error_errno(errno, "stat(%s) failed: %m", i->argument);
|
|
|
|
if (fstatat(dfd, bn, &b, AT_SYMLINK_NOFOLLOW) < 0)
|
|
return log_error_errno(errno, "stat(%s) failed: %m", i->path);
|
|
|
|
if ((a.st_mode ^ b.st_mode) & S_IFMT) {
|
|
log_debug("Can't copy to %s, file exists already and is of different type", i->path);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
fd = openat(dfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
|
|
if (fd < 0)
|
|
return log_error_errno(errno, "Failed to openat(%s): %m", i->path);
|
|
|
|
return fd_set_perms(i, fd, NULL);
|
|
}
|
|
|
|
typedef int (*action_t)(Item *, const char *);
|
|
typedef int (*fdaction_t)(Item *, int fd, const struct stat *st);
|
|
|
|
static int item_do(Item *i, int fd, fdaction_t action) {
|
|
struct stat st;
|
|
int r = 0, q;
|
|
|
|
assert(i);
|
|
assert(fd >= 0);
|
|
|
|
if (fstat(fd, &st) < 0) {
|
|
r = -errno;
|
|
goto finish;
|
|
}
|
|
|
|
/* This returns the first error we run into, but nevertheless
|
|
* tries to go on */
|
|
r = action(i, fd, &st);
|
|
|
|
if (S_ISDIR(st.st_mode)) {
|
|
char procfs_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
|
|
_cleanup_closedir_ DIR *d = NULL;
|
|
struct dirent *de;
|
|
|
|
/* The passed 'fd' was opened with O_PATH. We need to convert
|
|
* it into a 'regular' fd before reading the directory content. */
|
|
xsprintf(procfs_path, "/proc/self/fd/%i", fd);
|
|
|
|
d = opendir(procfs_path);
|
|
if (!d) {
|
|
r = r ?: -errno;
|
|
goto finish;
|
|
}
|
|
|
|
FOREACH_DIRENT_ALL(de, d, q = -errno; goto finish) {
|
|
int de_fd;
|
|
|
|
if (dot_or_dot_dot(de->d_name))
|
|
continue;
|
|
|
|
de_fd = openat(fd, de->d_name, O_NOFOLLOW|O_CLOEXEC|O_PATH);
|
|
if (de_fd >= 0)
|
|
/* pass ownership of dirent fd over */
|
|
q = item_do(i, de_fd, action);
|
|
else
|
|
q = -errno;
|
|
|
|
if (q < 0 && r == 0)
|
|
r = q;
|
|
}
|
|
}
|
|
finish:
|
|
safe_close(fd);
|
|
return r;
|
|
}
|
|
|
|
static int glob_item(Item *i, action_t action) {
|
|
_cleanup_globfree_ glob_t g = {
|
|
.gl_opendir = (void *(*)(const char *)) opendir_nomod,
|
|
};
|
|
int r = 0, k;
|
|
char **fn;
|
|
|
|
k = safe_glob(i->path, GLOB_NOSORT|GLOB_BRACE, &g);
|
|
if (k < 0 && k != -ENOENT)
|
|
return log_error_errno(k, "glob(%s) failed: %m", i->path);
|
|
|
|
STRV_FOREACH(fn, g.gl_pathv) {
|
|
k = action(i, *fn);
|
|
if (k < 0 && r == 0)
|
|
r = k;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int glob_item_recursively(Item *i, fdaction_t action) {
|
|
_cleanup_globfree_ glob_t g = {
|
|
.gl_opendir = (void *(*)(const char *)) opendir_nomod,
|
|
};
|
|
int r = 0, k;
|
|
char **fn;
|
|
|
|
k = safe_glob(i->path, GLOB_NOSORT|GLOB_BRACE, &g);
|
|
if (k < 0 && k != -ENOENT)
|
|
return log_error_errno(k, "glob(%s) failed: %m", i->path);
|
|
|
|
STRV_FOREACH(fn, g.gl_pathv) {
|
|
_cleanup_close_ int fd = -1;
|
|
|
|
/* Make sure we won't trigger/follow file object (such as
|
|
* device nodes, automounts, ...) pointed out by 'fn' with
|
|
* O_PATH. Note, when O_PATH is used, flags other than
|
|
* O_CLOEXEC, O_DIRECTORY, and O_NOFOLLOW are ignored. */
|
|
|
|
fd = open(*fn, O_CLOEXEC|O_NOFOLLOW|O_PATH);
|
|
if (fd < 0) {
|
|
r = r ?: -errno;
|
|
continue;
|
|
}
|
|
|
|
k = item_do(i, fd, action);
|
|
if (k < 0 && r == 0)
|
|
r = k;
|
|
|
|
/* we passed fd ownership to the previous call */
|
|
fd = -1;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
typedef enum {
|
|
CREATION_NORMAL,
|
|
CREATION_EXISTING,
|
|
CREATION_FORCE,
|
|
_CREATION_MODE_MAX,
|
|
_CREATION_MODE_INVALID = -1
|
|
} CreationMode;
|
|
|
|
static const char *creation_mode_verb_table[_CREATION_MODE_MAX] = {
|
|
[CREATION_NORMAL] = "Created",
|
|
[CREATION_EXISTING] = "Found existing",
|
|
[CREATION_FORCE] = "Created replacement",
|
|
};
|
|
|
|
DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(creation_mode_verb, CreationMode);
|
|
|
|
static int create_item(Item *i) {
|
|
struct stat st;
|
|
int r = 0;
|
|
int q = 0;
|
|
CreationMode creation;
|
|
|
|
assert(i);
|
|
|
|
log_debug("Running create action for entry %c %s", (char) i->type, i->path);
|
|
|
|
switch (i->type) {
|
|
|
|
case IGNORE_PATH:
|
|
case IGNORE_DIRECTORY_PATH:
|
|
case REMOVE_PATH:
|
|
case RECURSIVE_REMOVE_PATH:
|
|
return 0;
|
|
|
|
case CREATE_FILE:
|
|
RUN_WITH_UMASK(0000)
|
|
(void) mkdir_parents_label(i->path, 0755);
|
|
|
|
r = create_file(i, i->path);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
case TRUNCATE_FILE:
|
|
RUN_WITH_UMASK(0000)
|
|
(void) mkdir_parents_label(i->path, 0755);
|
|
|
|
r = truncate_file(i, i->path);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
case COPY_FILES:
|
|
RUN_WITH_UMASK(0000)
|
|
(void) mkdir_parents_label(i->path, 0755);
|
|
|
|
r = copy_files(i);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
case WRITE_FILE:
|
|
r = glob_item(i, write_one_file);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
break;
|
|
|
|
case CREATE_DIRECTORY:
|
|
case TRUNCATE_DIRECTORY:
|
|
case CREATE_SUBVOLUME:
|
|
case CREATE_SUBVOLUME_INHERIT_QUOTA:
|
|
case CREATE_SUBVOLUME_NEW_QUOTA:
|
|
RUN_WITH_UMASK(0000)
|
|
(void) mkdir_parents_label(i->path, 0755);
|
|
|
|
if (IN_SET(i->type, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA)) {
|
|
|
|
if (btrfs_is_subvol(empty_to_root(arg_root)) <= 0)
|
|
|
|
/* Don't create a subvolume unless the
|
|
* root directory is one, too. We do
|
|
* this under the assumption that if
|
|
* the root directory is just a plain
|
|
* directory (i.e. very light-weight),
|
|
* we shouldn't try to split it up
|
|
* into subvolumes (i.e. more
|
|
* heavy-weight). Thus, chroot()
|
|
* environments and suchlike will get
|
|
* a full brtfs subvolume set up below
|
|
* their tree only if they
|
|
* specifically set up a btrfs
|
|
* subvolume for the root dir too. */
|
|
|
|
r = -ENOTTY;
|
|
else {
|
|
RUN_WITH_UMASK((~i->mode) & 0777)
|
|
r = btrfs_subvol_make(i->path);
|
|
}
|
|
} else
|
|
r = 0;
|
|
|
|
if (IN_SET(i->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY) || r == -ENOTTY)
|
|
RUN_WITH_UMASK(0000)
|
|
r = mkdir_label(i->path, i->mode);
|
|
|
|
if (r < 0) {
|
|
int k;
|
|
|
|
if (!IN_SET(r, -EEXIST, -EROFS))
|
|
return log_error_errno(r, "Failed to create directory or subvolume \"%s\": %m", i->path);
|
|
|
|
k = is_dir(i->path, false);
|
|
if (k == -ENOENT && r == -EROFS)
|
|
return log_error_errno(r, "%s does not exist and cannot be created as the file system is read-only.", i->path);
|
|
if (k < 0)
|
|
return log_error_errno(k, "Failed to check if %s exists: %m", i->path);
|
|
if (!k) {
|
|
log_warning("\"%s\" already exists and is not a directory.", i->path);
|
|
return 0;
|
|
}
|
|
|
|
creation = CREATION_EXISTING;
|
|
} else
|
|
creation = CREATION_NORMAL;
|
|
|
|
log_debug("%s directory \"%s\".", creation_mode_verb_to_string(creation), i->path);
|
|
|
|
if (IN_SET(i->type, CREATE_SUBVOLUME_NEW_QUOTA, CREATE_SUBVOLUME_INHERIT_QUOTA)) {
|
|
r = btrfs_subvol_auto_qgroup(i->path, 0, i->type == CREATE_SUBVOLUME_NEW_QUOTA);
|
|
if (r == -ENOTTY)
|
|
log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (unsupported fs or dir not a subvolume): %m", i->path);
|
|
else if (r == -EROFS)
|
|
log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (fs is read-only).", i->path);
|
|
else if (r == -ENOPROTOOPT)
|
|
log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (quota support is disabled).", i->path);
|
|
else if (r < 0)
|
|
q = log_error_errno(r, "Failed to adjust quota for subvolume \"%s\": %m", i->path);
|
|
else if (r > 0)
|
|
log_debug("Adjusted quota for subvolume \"%s\".", i->path);
|
|
else if (r == 0)
|
|
log_debug("Quota for subvolume \"%s\" already in place, no change made.", i->path);
|
|
}
|
|
|
|
_fallthrough_;
|
|
case EMPTY_DIRECTORY:
|
|
r = glob_item(i, path_set_perms);
|
|
if (q < 0)
|
|
return q;
|
|
if (r < 0)
|
|
return r;
|
|
|
|
break;
|
|
|
|
case CREATE_FIFO:
|
|
RUN_WITH_UMASK(0000) {
|
|
(void) mkdir_parents_label(i->path, 0755);
|
|
|
|
mac_selinux_create_file_prepare(i->path, S_IFIFO);
|
|
r = mkfifo(i->path, i->mode);
|
|
mac_selinux_create_file_clear();
|
|
}
|
|
|
|
if (r < 0) {
|
|
if (errno != EEXIST)
|
|
return log_error_errno(errno, "Failed to create fifo %s: %m", i->path);
|
|
|
|
if (lstat(i->path, &st) < 0)
|
|
return log_error_errno(errno, "stat(%s) failed: %m", i->path);
|
|
|
|
if (!S_ISFIFO(st.st_mode)) {
|
|
|
|
if (i->force) {
|
|
RUN_WITH_UMASK(0000) {
|
|
mac_selinux_create_file_prepare(i->path, S_IFIFO);
|
|
r = mkfifo_atomic(i->path, i->mode);
|
|
mac_selinux_create_file_clear();
|
|
}
|
|
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to create fifo %s: %m", i->path);
|
|
creation = CREATION_FORCE;
|
|
} else {
|
|
log_warning("\"%s\" already exists and is not a fifo.", i->path);
|
|
return 0;
|
|
}
|
|
} else
|
|
creation = CREATION_EXISTING;
|
|
} else
|
|
creation = CREATION_NORMAL;
|
|
log_debug("%s fifo \"%s\".", creation_mode_verb_to_string(creation), i->path);
|
|
|
|
r = path_set_perms(i, i->path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
break;
|
|
|
|
case CREATE_SYMLINK: {
|
|
RUN_WITH_UMASK(0000)
|
|
(void) mkdir_parents_label(i->path, 0755);
|
|
|
|
mac_selinux_create_file_prepare(i->path, S_IFLNK);
|
|
r = symlink(i->argument, i->path);
|
|
mac_selinux_create_file_clear();
|
|
|
|
if (r < 0) {
|
|
_cleanup_free_ char *x = NULL;
|
|
|
|
if (errno != EEXIST)
|
|
return log_error_errno(errno, "symlink(%s, %s) failed: %m", i->argument, i->path);
|
|
|
|
r = readlink_malloc(i->path, &x);
|
|
if (r < 0 || !streq(i->argument, x)) {
|
|
|
|
if (i->force) {
|
|
mac_selinux_create_file_prepare(i->path, S_IFLNK);
|
|
r = symlink_atomic(i->argument, i->path);
|
|
mac_selinux_create_file_clear();
|
|
|
|
if (IN_SET(r, -EISDIR, -EEXIST, -ENOTEMPTY)) {
|
|
r = rm_rf(i->path, REMOVE_ROOT|REMOVE_PHYSICAL);
|
|
if (r < 0)
|
|
return log_error_errno(r, "rm -fr %s failed: %m", i->path);
|
|
|
|
mac_selinux_create_file_prepare(i->path, S_IFLNK);
|
|
r = symlink(i->argument, i->path) < 0 ? -errno : 0;
|
|
mac_selinux_create_file_clear();
|
|
}
|
|
if (r < 0)
|
|
return log_error_errno(r, "symlink(%s, %s) failed: %m", i->argument, i->path);
|
|
|
|
creation = CREATION_FORCE;
|
|
} else {
|
|
log_debug("\"%s\" is not a symlink or does not point to the correct path.", i->path);
|
|
return 0;
|
|
}
|
|
} else
|
|
creation = CREATION_EXISTING;
|
|
} else
|
|
|
|
creation = CREATION_NORMAL;
|
|
log_debug("%s symlink \"%s\".", creation_mode_verb_to_string(creation), i->path);
|
|
break;
|
|
}
|
|
|
|
case CREATE_BLOCK_DEVICE:
|
|
case CREATE_CHAR_DEVICE: {
|
|
mode_t file_type;
|
|
|
|
if (have_effective_cap(CAP_MKNOD) == 0) {
|
|
/* In a container we lack CAP_MKNOD. We
|
|
shouldn't attempt to create the device node in
|
|
that case to avoid noise, and we don't support
|
|
virtualized devices in containers anyway. */
|
|
|
|
log_debug("We lack CAP_MKNOD, skipping creation of device node %s.", i->path);
|
|
return 0;
|
|
}
|
|
|
|
RUN_WITH_UMASK(0000)
|
|
(void) mkdir_parents_label(i->path, 0755);
|
|
|
|
file_type = i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR;
|
|
|
|
RUN_WITH_UMASK(0000) {
|
|
mac_selinux_create_file_prepare(i->path, file_type);
|
|
r = mknod(i->path, i->mode | file_type, i->major_minor);
|
|
mac_selinux_create_file_clear();
|
|
}
|
|
|
|
if (r < 0) {
|
|
if (errno == EPERM) {
|
|
log_debug("We lack permissions, possibly because of cgroup configuration; "
|
|
"skipping creation of device node %s.", i->path);
|
|
return 0;
|
|
}
|
|
|
|
if (errno != EEXIST)
|
|
return log_error_errno(errno, "Failed to create device node %s: %m", i->path);
|
|
|
|
if (lstat(i->path, &st) < 0)
|
|
return log_error_errno(errno, "stat(%s) failed: %m", i->path);
|
|
|
|
if ((st.st_mode & S_IFMT) != file_type) {
|
|
|
|
if (i->force) {
|
|
|
|
RUN_WITH_UMASK(0000) {
|
|
mac_selinux_create_file_prepare(i->path, file_type);
|
|
r = mknod_atomic(i->path, i->mode | file_type, i->major_minor);
|
|
mac_selinux_create_file_clear();
|
|
}
|
|
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to create device node \"%s\": %m", i->path);
|
|
creation = CREATION_FORCE;
|
|
} else {
|
|
log_debug("%s is not a device node.", i->path);
|
|
return 0;
|
|
}
|
|
} else
|
|
creation = CREATION_EXISTING;
|
|
} else
|
|
creation = CREATION_NORMAL;
|
|
|
|
log_debug("%s %s device node \"%s\" %u:%u.",
|
|
creation_mode_verb_to_string(creation),
|
|
i->type == CREATE_BLOCK_DEVICE ? "block" : "char",
|
|
i->path, major(i->mode), minor(i->mode));
|
|
|
|
r = path_set_perms(i, i->path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
break;
|
|
}
|
|
|
|
case ADJUST_MODE:
|
|
case RELABEL_PATH:
|
|
r = glob_item(i, path_set_perms);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
case RECURSIVE_RELABEL_PATH:
|
|
r = glob_item_recursively(i, fd_set_perms);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
case SET_XATTR:
|
|
r = glob_item(i, path_set_xattrs);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
case RECURSIVE_SET_XATTR:
|
|
r = glob_item_recursively(i, fd_set_xattrs);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
case SET_ACL:
|
|
r = glob_item(i, path_set_acls);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
case RECURSIVE_SET_ACL:
|
|
r = glob_item_recursively(i, fd_set_acls);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
case SET_ATTRIBUTE:
|
|
r = glob_item(i, path_set_attribute);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
case RECURSIVE_SET_ATTRIBUTE:
|
|
r = glob_item_recursively(i, fd_set_attribute);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int remove_item_instance(Item *i, const char *instance) {
|
|
int r;
|
|
|
|
assert(i);
|
|
|
|
switch (i->type) {
|
|
|
|
case REMOVE_PATH:
|
|
if (remove(instance) < 0 && errno != ENOENT)
|
|
return log_error_errno(errno, "rm(%s): %m", instance);
|
|
|
|
break;
|
|
|
|
case TRUNCATE_DIRECTORY:
|
|
case RECURSIVE_REMOVE_PATH:
|
|
/* FIXME: we probably should use dir_cleanup() here
|
|
* instead of rm_rf() so that 'x' is honoured. */
|
|
log_debug("rm -rf \"%s\"", instance);
|
|
r = rm_rf(instance, (i->type == RECURSIVE_REMOVE_PATH ? REMOVE_ROOT|REMOVE_SUBVOLUME : 0) | REMOVE_PHYSICAL);
|
|
if (r < 0 && r != -ENOENT)
|
|
return log_error_errno(r, "rm_rf(%s): %m", instance);
|
|
|
|
break;
|
|
|
|
default:
|
|
assert_not_reached("wut?");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int remove_item(Item *i) {
|
|
assert(i);
|
|
|
|
log_debug("Running remove action for entry %c %s", (char) i->type, i->path);
|
|
|
|
switch (i->type) {
|
|
|
|
case REMOVE_PATH:
|
|
case TRUNCATE_DIRECTORY:
|
|
case RECURSIVE_REMOVE_PATH:
|
|
return glob_item(i, remove_item_instance);
|
|
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int clean_item_instance(Item *i, const char* instance) {
|
|
_cleanup_closedir_ DIR *d = NULL;
|
|
struct stat s, ps;
|
|
bool mountpoint;
|
|
usec_t cutoff, n;
|
|
char timestamp[FORMAT_TIMESTAMP_MAX];
|
|
|
|
assert(i);
|
|
|
|
if (!i->age_set)
|
|
return 0;
|
|
|
|
n = now(CLOCK_REALTIME);
|
|
if (n < i->age)
|
|
return 0;
|
|
|
|
cutoff = n - i->age;
|
|
|
|
d = opendir_nomod(instance);
|
|
if (!d) {
|
|
if (IN_SET(errno, ENOENT, ENOTDIR)) {
|
|
log_debug_errno(errno, "Directory \"%s\": %m", instance);
|
|
return 0;
|
|
}
|
|
|
|
return log_error_errno(errno, "Failed to open directory %s: %m", instance);
|
|
}
|
|
|
|
if (fstat(dirfd(d), &s) < 0)
|
|
return log_error_errno(errno, "stat(%s) failed: %m", i->path);
|
|
|
|
if (!S_ISDIR(s.st_mode)) {
|
|
log_error("%s is not a directory.", i->path);
|
|
return -ENOTDIR;
|
|
}
|
|
|
|
if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0)
|
|
return log_error_errno(errno, "stat(%s/..) failed: %m", i->path);
|
|
|
|
mountpoint = s.st_dev != ps.st_dev || s.st_ino == ps.st_ino;
|
|
|
|
log_debug("Cleanup threshold for %s \"%s\" is %s",
|
|
mountpoint ? "mount point" : "directory",
|
|
instance,
|
|
format_timestamp_us(timestamp, sizeof(timestamp), cutoff));
|
|
|
|
return dir_cleanup(i, instance, d, &s, cutoff, s.st_dev, mountpoint,
|
|
MAX_DEPTH, i->keep_first_level);
|
|
}
|
|
|
|
static int clean_item(Item *i) {
|
|
assert(i);
|
|
|
|
log_debug("Running clean action for entry %c %s", (char) i->type, i->path);
|
|
|
|
switch (i->type) {
|
|
case CREATE_DIRECTORY:
|
|
case CREATE_SUBVOLUME:
|
|
case CREATE_SUBVOLUME_INHERIT_QUOTA:
|
|
case CREATE_SUBVOLUME_NEW_QUOTA:
|
|
case TRUNCATE_DIRECTORY:
|
|
case IGNORE_PATH:
|
|
case COPY_FILES:
|
|
clean_item_instance(i, i->path);
|
|
return 0;
|
|
case EMPTY_DIRECTORY:
|
|
case IGNORE_DIRECTORY_PATH:
|
|
return glob_item(i, clean_item_instance);
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int process_item_array(ItemArray *array);
|
|
|
|
static int process_item(Item *i) {
|
|
int r, q, p, t = 0;
|
|
_cleanup_free_ char *prefix = NULL;
|
|
|
|
assert(i);
|
|
|
|
if (i->done)
|
|
return 0;
|
|
|
|
i->done = true;
|
|
|
|
prefix = malloc(strlen(i->path) + 1);
|
|
if (!prefix)
|
|
return log_oom();
|
|
|
|
PATH_FOREACH_PREFIX(prefix, i->path) {
|
|
ItemArray *j;
|
|
|
|
j = ordered_hashmap_get(items, prefix);
|
|
if (j) {
|
|
int s;
|
|
|
|
s = process_item_array(j);
|
|
if (s < 0 && t == 0)
|
|
t = s;
|
|
}
|
|
}
|
|
|
|
if (chase_symlinks(i->path, NULL, CHASE_NO_AUTOFS, NULL) == -EREMOTE)
|
|
return t;
|
|
|
|
r = arg_create ? create_item(i) : 0;
|
|
q = arg_remove ? remove_item(i) : 0;
|
|
p = arg_clean ? clean_item(i) : 0;
|
|
|
|
return t < 0 ? t :
|
|
r < 0 ? r :
|
|
q < 0 ? q :
|
|
p;
|
|
}
|
|
|
|
static int process_item_array(ItemArray *array) {
|
|
unsigned n;
|
|
int r = 0, k;
|
|
|
|
assert(array);
|
|
|
|
for (n = 0; n < array->count; n++) {
|
|
k = process_item(array->items + n);
|
|
if (k < 0 && r == 0)
|
|
r = k;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static void item_free_contents(Item *i) {
|
|
assert(i);
|
|
free(i->path);
|
|
free(i->argument);
|
|
strv_free(i->xattrs);
|
|
|
|
#if HAVE_ACL
|
|
acl_free(i->acl_access);
|
|
acl_free(i->acl_default);
|
|
#endif
|
|
}
|
|
|
|
static void item_array_free(ItemArray *a) {
|
|
unsigned n;
|
|
|
|
if (!a)
|
|
return;
|
|
|
|
for (n = 0; n < a->count; n++)
|
|
item_free_contents(a->items + n);
|
|
free(a->items);
|
|
free(a);
|
|
}
|
|
|
|
static int item_compare(const void *a, const void *b) {
|
|
const Item *x = a, *y = b;
|
|
|
|
/* Make sure that the ownership taking item is put first, so
|
|
* that we first create the node, and then can adjust it */
|
|
|
|
if (takes_ownership(x->type) && !takes_ownership(y->type))
|
|
return -1;
|
|
if (!takes_ownership(x->type) && takes_ownership(y->type))
|
|
return 1;
|
|
|
|
return (int) x->type - (int) y->type;
|
|
}
|
|
|
|
static bool item_compatible(Item *a, Item *b) {
|
|
assert(a);
|
|
assert(b);
|
|
assert(streq(a->path, b->path));
|
|
|
|
if (takes_ownership(a->type) && takes_ownership(b->type))
|
|
/* check if the items are the same */
|
|
return streq_ptr(a->argument, b->argument) &&
|
|
|
|
a->uid_set == b->uid_set &&
|
|
a->uid == b->uid &&
|
|
|
|
a->gid_set == b->gid_set &&
|
|
a->gid == b->gid &&
|
|
|
|
a->mode_set == b->mode_set &&
|
|
a->mode == b->mode &&
|
|
|
|
a->age_set == b->age_set &&
|
|
a->age == b->age &&
|
|
|
|
a->mask_perms == b->mask_perms &&
|
|
|
|
a->keep_first_level == b->keep_first_level &&
|
|
|
|
a->major_minor == b->major_minor;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool should_include_path(const char *path) {
|
|
char **prefix;
|
|
|
|
STRV_FOREACH(prefix, arg_exclude_prefixes)
|
|
if (path_startswith(path, *prefix)) {
|
|
log_debug("Entry \"%s\" matches exclude prefix \"%s\", skipping.",
|
|
path, *prefix);
|
|
return false;
|
|
}
|
|
|
|
STRV_FOREACH(prefix, arg_include_prefixes)
|
|
if (path_startswith(path, *prefix)) {
|
|
log_debug("Entry \"%s\" matches include prefix \"%s\".", path, *prefix);
|
|
return true;
|
|
}
|
|
|
|
/* no matches, so we should include this path only if we
|
|
* have no whitelist at all */
|
|
if (strv_isempty(arg_include_prefixes))
|
|
return true;
|
|
|
|
log_debug("Entry \"%s\" does not match any include prefix, skipping.", path);
|
|
return false;
|
|
}
|
|
|
|
static int specifier_expansion_from_arg(Item *i) {
|
|
_cleanup_free_ char *unescaped = NULL, *resolved = NULL;
|
|
char **xattr;
|
|
int r;
|
|
|
|
assert(i);
|
|
|
|
if (i->argument == NULL)
|
|
return 0;
|
|
|
|
switch (i->type) {
|
|
case COPY_FILES:
|
|
case CREATE_SYMLINK:
|
|
case CREATE_FILE:
|
|
case TRUNCATE_FILE:
|
|
case WRITE_FILE:
|
|
r = cunescape(i->argument, 0, &unescaped);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to unescape parameter to write: %s", i->argument);
|
|
|
|
r = specifier_printf(unescaped, specifier_table, NULL, &resolved);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
free_and_replace(i->argument, resolved);
|
|
break;
|
|
|
|
case SET_XATTR:
|
|
case RECURSIVE_SET_XATTR:
|
|
assert(i->xattrs);
|
|
|
|
STRV_FOREACH (xattr, i->xattrs) {
|
|
r = specifier_printf(*xattr, specifier_table, NULL, &resolved);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
free_and_replace(*xattr, resolved);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int patch_var_run(const char *fname, unsigned line, char **path) {
|
|
const char *k;
|
|
char *n;
|
|
|
|
assert(path);
|
|
assert(*path);
|
|
|
|
/* Optionally rewrites lines referencing /var/run/, to use /run/ instead. Why bother? tmpfiles merges lines in
|
|
* some cases and detects conflicts in others. If files/directories are specified through two equivalent lines
|
|
* this is problematic as neither case will be detected. Ideally we'd detect these cases by resolving symlinks
|
|
* early, but that's precisely not what we can do here as this code very likely is running very early on, at a
|
|
* time where the paths in question are not available yet, or even more importantly, our own tmpfiles rules
|
|
* might create the paths that are intermediary to the listed paths. We can't really cover the generic case,
|
|
* but the least we can do is cover the specific case of /var/run vs. /run, as /var/run is a legacy name for
|
|
* /run only, and we explicitly document that and require that on systemd systems the former is a symlink to
|
|
* the latter. Moreover files below this path are by far the primary usecase for tmpfiles.d/. */
|
|
|
|
k = path_startswith(*path, "/var/run/");
|
|
if (isempty(k)) /* Don't complain about other paths than /var/run, and not about /var/run itself either. */
|
|
return 0;
|
|
|
|
n = strjoin("/run/", k);
|
|
if (!n)
|
|
return log_oom();
|
|
|
|
/* Also log about this briefly. We do so at LOG_NOTICE level, as we fixed up the situation automatically, hence
|
|
* there's no immediate need for action by the user. However, in the interest of making things less confusing
|
|
* to the user, let's still inform the user that these snippets should really be updated. */
|
|
|
|
log_notice("[%s:%u] Line references path below legacy directory /var/run/, updating %s → %s; please update the tmpfiles.d/ drop-in file accordingly.", fname, line, *path, n);
|
|
|
|
free(*path);
|
|
*path = n;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_line(const char *fname, unsigned line, const char *buffer, bool *invalid_config) {
|
|
|
|
_cleanup_free_ char *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL;
|
|
_cleanup_(item_free_contents) Item i = {};
|
|
ItemArray *existing;
|
|
OrderedHashmap *h;
|
|
int r, pos;
|
|
bool force = false, boot = false;
|
|
|
|
assert(fname);
|
|
assert(line >= 1);
|
|
assert(buffer);
|
|
|
|
r = extract_many_words(
|
|
&buffer,
|
|
NULL,
|
|
EXTRACT_QUOTES,
|
|
&action,
|
|
&path,
|
|
&mode,
|
|
&user,
|
|
&group,
|
|
&age,
|
|
NULL);
|
|
if (r < 0) {
|
|
if (IN_SET(r, -EINVAL, -EBADSLT))
|
|
/* invalid quoting and such or an unknown specifier */
|
|
*invalid_config = true;
|
|
return log_error_errno(r, "[%s:%u] Failed to parse line: %m", fname, line);
|
|
} else if (r < 2) {
|
|
*invalid_config = true;
|
|
log_error("[%s:%u] Syntax error.", fname, line);
|
|
return -EIO;
|
|
}
|
|
|
|
if (!isempty(buffer) && !streq(buffer, "-")) {
|
|
i.argument = strdup(buffer);
|
|
if (!i.argument)
|
|
return log_oom();
|
|
}
|
|
|
|
if (isempty(action)) {
|
|
*invalid_config = true;
|
|
log_error("[%s:%u] Command too short '%s'.", fname, line, action);
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (pos = 1; action[pos]; pos++) {
|
|
if (action[pos] == '!' && !boot)
|
|
boot = true;
|
|
else if (action[pos] == '+' && !force)
|
|
force = true;
|
|
else {
|
|
*invalid_config = true;
|
|
log_error("[%s:%u] Unknown modifiers in command '%s'",
|
|
fname, line, action);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (boot && !arg_boot) {
|
|
log_debug("Ignoring entry %s \"%s\" because --boot is not specified.",
|
|
action, path);
|
|
return 0;
|
|
}
|
|
|
|
i.type = action[0];
|
|
i.force = force;
|
|
|
|
r = specifier_printf(path, specifier_table, NULL, &i.path);
|
|
if (r == -ENXIO)
|
|
return log_unresolvable_specifier(fname, line);
|
|
if (r < 0) {
|
|
if (IN_SET(r, -EINVAL, -EBADSLT))
|
|
*invalid_config = true;
|
|
return log_error_errno(r, "[%s:%u] Failed to replace specifiers: %s", fname, line, path);
|
|
}
|
|
|
|
r = patch_var_run(fname, line, &i.path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
switch (i.type) {
|
|
|
|
case CREATE_DIRECTORY:
|
|
case CREATE_SUBVOLUME:
|
|
case CREATE_SUBVOLUME_INHERIT_QUOTA:
|
|
case CREATE_SUBVOLUME_NEW_QUOTA:
|
|
case EMPTY_DIRECTORY:
|
|
case TRUNCATE_DIRECTORY:
|
|
case CREATE_FIFO:
|
|
case IGNORE_PATH:
|
|
case IGNORE_DIRECTORY_PATH:
|
|
case REMOVE_PATH:
|
|
case RECURSIVE_REMOVE_PATH:
|
|
case ADJUST_MODE:
|
|
case RELABEL_PATH:
|
|
case RECURSIVE_RELABEL_PATH:
|
|
if (i.argument)
|
|
log_warning("[%s:%u] %c lines don't take argument fields, ignoring.", fname, line, i.type);
|
|
|
|
break;
|
|
|
|
case CREATE_FILE:
|
|
case TRUNCATE_FILE:
|
|
break;
|
|
|
|
case CREATE_SYMLINK:
|
|
if (!i.argument) {
|
|
i.argument = strappend("/usr/share/factory/", i.path);
|
|
if (!i.argument)
|
|
return log_oom();
|
|
}
|
|
break;
|
|
|
|
case WRITE_FILE:
|
|
if (!i.argument) {
|
|
*invalid_config = true;
|
|
log_error("[%s:%u] Write file requires argument.", fname, line);
|
|
return -EBADMSG;
|
|
}
|
|
break;
|
|
|
|
case COPY_FILES:
|
|
if (!i.argument) {
|
|
i.argument = strappend("/usr/share/factory/", i.path);
|
|
if (!i.argument)
|
|
return log_oom();
|
|
} else if (!path_is_absolute(i.argument)) {
|
|
*invalid_config = true;
|
|
log_error("[%s:%u] Source path is not absolute.", fname, line);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
path_simplify(i.argument, false);
|
|
break;
|
|
|
|
case CREATE_CHAR_DEVICE:
|
|
case CREATE_BLOCK_DEVICE: {
|
|
unsigned major, minor;
|
|
|
|
if (!i.argument) {
|
|
*invalid_config = true;
|
|
log_error("[%s:%u] Device file requires argument.", fname, line);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
if (sscanf(i.argument, "%u:%u", &major, &minor) != 2) {
|
|
*invalid_config = true;
|
|
log_error("[%s:%u] Can't parse device file major/minor '%s'.", fname, line, i.argument);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
i.major_minor = makedev(major, minor);
|
|
break;
|
|
}
|
|
|
|
case SET_XATTR:
|
|
case RECURSIVE_SET_XATTR:
|
|
if (!i.argument) {
|
|
*invalid_config = true;
|
|
log_error("[%s:%u] Set extended attribute requires argument.", fname, line);
|
|
return -EBADMSG;
|
|
}
|
|
r = parse_xattrs_from_arg(&i);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
case SET_ACL:
|
|
case RECURSIVE_SET_ACL:
|
|
if (!i.argument) {
|
|
*invalid_config = true;
|
|
log_error("[%s:%u] Set ACLs requires argument.", fname, line);
|
|
return -EBADMSG;
|
|
}
|
|
r = parse_acls_from_arg(&i);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
case SET_ATTRIBUTE:
|
|
case RECURSIVE_SET_ATTRIBUTE:
|
|
if (!i.argument) {
|
|
*invalid_config = true;
|
|
log_error("[%s:%u] Set file attribute requires argument.", fname, line);
|
|
return -EBADMSG;
|
|
}
|
|
r = parse_attribute_from_arg(&i);
|
|
if (IN_SET(r, -EINVAL, -EBADSLT))
|
|
*invalid_config = true;
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
default:
|
|
log_error("[%s:%u] Unknown command type '%c'.", fname, line, (char) i.type);
|
|
*invalid_config = true;
|
|
return -EBADMSG;
|
|
}
|
|
|
|
if (!path_is_absolute(i.path)) {
|
|
log_error("[%s:%u] Path '%s' not absolute.", fname, line, i.path);
|
|
*invalid_config = true;
|
|
return -EBADMSG;
|
|
}
|
|
|
|
path_simplify(i.path, false);
|
|
|
|
if (!should_include_path(i.path))
|
|
return 0;
|
|
|
|
r = specifier_expansion_from_arg(&i);
|
|
if (r == -ENXIO)
|
|
return log_unresolvable_specifier(fname, line);
|
|
if (r < 0) {
|
|
if (IN_SET(r, -EINVAL, -EBADSLT))
|
|
*invalid_config = true;
|
|
return log_error_errno(r, "[%s:%u] Failed to substitute specifiers in argument: %m",
|
|
fname, line);
|
|
}
|
|
|
|
if (arg_root) {
|
|
char *p;
|
|
|
|
p = prefix_root(arg_root, i.path);
|
|
if (!p)
|
|
return log_oom();
|
|
|
|
free(i.path);
|
|
i.path = p;
|
|
}
|
|
|
|
if (!isempty(user) && !streq(user, "-")) {
|
|
const char *u = user;
|
|
|
|
r = get_user_creds(&u, &i.uid, NULL, NULL, NULL);
|
|
if (r < 0) {
|
|
*invalid_config = true;
|
|
return log_error_errno(r, "[%s:%u] Unknown user '%s'.", fname, line, user);
|
|
}
|
|
|
|
i.uid_set = true;
|
|
}
|
|
|
|
if (!isempty(group) && !streq(group, "-")) {
|
|
const char *g = group;
|
|
|
|
r = get_group_creds(&g, &i.gid);
|
|
if (r < 0) {
|
|
*invalid_config = true;
|
|
log_error("[%s:%u] Unknown group '%s'.", fname, line, group);
|
|
return r;
|
|
}
|
|
|
|
i.gid_set = true;
|
|
}
|
|
|
|
if (!isempty(mode) && !streq(mode, "-")) {
|
|
const char *mm = mode;
|
|
unsigned m;
|
|
|
|
if (*mm == '~') {
|
|
i.mask_perms = true;
|
|
mm++;
|
|
}
|
|
|
|
if (parse_mode(mm, &m) < 0) {
|
|
*invalid_config = true;
|
|
log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
i.mode = m;
|
|
i.mode_set = true;
|
|
} else
|
|
i.mode = IN_SET(i.type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA) ? 0755 : 0644;
|
|
|
|
if (!isempty(age) && !streq(age, "-")) {
|
|
const char *a = age;
|
|
|
|
if (*a == '~') {
|
|
i.keep_first_level = true;
|
|
a++;
|
|
}
|
|
|
|
if (parse_sec(a, &i.age) < 0) {
|
|
*invalid_config = true;
|
|
log_error("[%s:%u] Invalid age '%s'.", fname, line, age);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
i.age_set = true;
|
|
}
|
|
|
|
h = needs_glob(i.type) ? globs : items;
|
|
|
|
existing = ordered_hashmap_get(h, i.path);
|
|
if (existing) {
|
|
unsigned n;
|
|
|
|
for (n = 0; n < existing->count; n++) {
|
|
if (!item_compatible(existing->items + n, &i)) {
|
|
log_notice("[%s:%u] Duplicate line for path \"%s\", ignoring.",
|
|
fname, line, i.path);
|
|
return 0;
|
|
}
|
|
}
|
|
} else {
|
|
existing = new0(ItemArray, 1);
|
|
if (!existing)
|
|
return log_oom();
|
|
|
|
r = ordered_hashmap_put(h, i.path, existing);
|
|
if (r < 0)
|
|
return log_oom();
|
|
}
|
|
|
|
if (!GREEDY_REALLOC(existing->items, existing->size, existing->count + 1))
|
|
return log_oom();
|
|
|
|
memcpy(existing->items + existing->count++, &i, sizeof(i));
|
|
|
|
/* Sort item array, to enforce stable ordering of application */
|
|
qsort_safe(existing->items, existing->count, sizeof(Item), item_compare);
|
|
|
|
zero(i);
|
|
return 0;
|
|
}
|
|
|
|
static int cat_config(char **config_dirs, char **args) {
|
|
_cleanup_strv_free_ char **files = NULL;
|
|
int r;
|
|
|
|
r = conf_files_list_with_replacement(arg_root, config_dirs, arg_replace, &files, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return cat_files(NULL, files, 0);
|
|
}
|
|
|
|
static void help(void) {
|
|
printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
|
|
"Creates, deletes and cleans up volatile and temporary files and directories.\n\n"
|
|
" -h --help Show this help\n"
|
|
" --user Execute user configuration\n"
|
|
" --version Show package version\n"
|
|
" --cat-config Show configuration files\n"
|
|
" --create Create marked files/directories\n"
|
|
" --clean Clean up marked directories\n"
|
|
" --remove Remove marked files/directories\n"
|
|
" --boot Execute actions only safe at boot\n"
|
|
" --prefix=PATH Only apply rules with the specified prefix\n"
|
|
" --exclude-prefix=PATH Ignore rules with the specified prefix\n"
|
|
" --root=PATH Operate on an alternate filesystem root\n"
|
|
" --replace=PATH Treat arguments as replacement for PATH\n"
|
|
" --no-pager Do not pipe output into a pager\n"
|
|
, program_invocation_short_name);
|
|
}
|
|
|
|
static int parse_argv(int argc, char *argv[]) {
|
|
|
|
enum {
|
|
ARG_VERSION = 0x100,
|
|
ARG_CAT_CONFIG,
|
|
ARG_USER,
|
|
ARG_CREATE,
|
|
ARG_CLEAN,
|
|
ARG_REMOVE,
|
|
ARG_BOOT,
|
|
ARG_PREFIX,
|
|
ARG_EXCLUDE_PREFIX,
|
|
ARG_ROOT,
|
|
ARG_REPLACE,
|
|
ARG_NO_PAGER,
|
|
};
|
|
|
|
static const struct option options[] = {
|
|
{ "help", no_argument, NULL, 'h' },
|
|
{ "user", no_argument, NULL, ARG_USER },
|
|
{ "version", no_argument, NULL, ARG_VERSION },
|
|
{ "cat-config", no_argument, NULL, ARG_CAT_CONFIG },
|
|
{ "create", no_argument, NULL, ARG_CREATE },
|
|
{ "clean", no_argument, NULL, ARG_CLEAN },
|
|
{ "remove", no_argument, NULL, ARG_REMOVE },
|
|
{ "boot", no_argument, NULL, ARG_BOOT },
|
|
{ "prefix", required_argument, NULL, ARG_PREFIX },
|
|
{ "exclude-prefix", required_argument, NULL, ARG_EXCLUDE_PREFIX },
|
|
{ "root", required_argument, NULL, ARG_ROOT },
|
|
{ "replace", required_argument, NULL, ARG_REPLACE },
|
|
{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
|
|
{}
|
|
};
|
|
|
|
int c, r;
|
|
|
|
assert(argc >= 0);
|
|
assert(argv);
|
|
|
|
while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
|
|
|
|
switch (c) {
|
|
|
|
case 'h':
|
|
help();
|
|
return 0;
|
|
|
|
case ARG_VERSION:
|
|
return version();
|
|
|
|
case ARG_CAT_CONFIG:
|
|
arg_cat_config = true;
|
|
break;
|
|
|
|
case ARG_USER:
|
|
arg_user = true;
|
|
break;
|
|
|
|
case ARG_CREATE:
|
|
arg_create = true;
|
|
break;
|
|
|
|
case ARG_CLEAN:
|
|
arg_clean = true;
|
|
break;
|
|
|
|
case ARG_REMOVE:
|
|
arg_remove = true;
|
|
break;
|
|
|
|
case ARG_BOOT:
|
|
arg_boot = true;
|
|
break;
|
|
|
|
case ARG_PREFIX:
|
|
if (strv_push(&arg_include_prefixes, optarg) < 0)
|
|
return log_oom();
|
|
break;
|
|
|
|
case ARG_EXCLUDE_PREFIX:
|
|
if (strv_push(&arg_exclude_prefixes, optarg) < 0)
|
|
return log_oom();
|
|
break;
|
|
|
|
case ARG_ROOT:
|
|
r = parse_path_argument_and_warn(optarg, true, &arg_root);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
case ARG_REPLACE:
|
|
if (!path_is_absolute(optarg) ||
|
|
!endswith(optarg, ".conf")) {
|
|
log_error("The argument to --replace= must an absolute path to a config file");
|
|
return -EINVAL;
|
|
}
|
|
|
|
arg_replace = optarg;
|
|
break;
|
|
|
|
case ARG_NO_PAGER:
|
|
arg_no_pager = true;
|
|
break;
|
|
|
|
case '?':
|
|
return -EINVAL;
|
|
|
|
default:
|
|
assert_not_reached("Unhandled option");
|
|
}
|
|
|
|
if (!arg_clean && !arg_create && !arg_remove && !arg_cat_config) {
|
|
log_error("You need to specify at least one of --clean, --create or --remove.");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (arg_replace && arg_cat_config) {
|
|
log_error("Option --replace= is not supported with --cat-config");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (arg_replace && optind >= argc) {
|
|
log_error("When --replace= is given, some configuration items must be specified");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int read_config_file(char **config_dirs, const char *fn, bool ignore_enoent, bool *invalid_config) {
|
|
_cleanup_fclose_ FILE *_f = NULL;
|
|
FILE *f;
|
|
char line[LINE_MAX];
|
|
Iterator iterator;
|
|
unsigned v = 0;
|
|
Item *i;
|
|
int r = 0;
|
|
|
|
assert(fn);
|
|
|
|
if (streq(fn, "-")) {
|
|
log_debug("Reading config from stdin…");
|
|
fn = "<stdin>";
|
|
f = stdin;
|
|
} else {
|
|
r = search_and_fopen(fn, "re", arg_root, (const char**) config_dirs, &_f);
|
|
if (r < 0) {
|
|
if (ignore_enoent && r == -ENOENT) {
|
|
log_debug_errno(r, "Failed to open \"%s\", ignoring: %m", fn);
|
|
return 0;
|
|
}
|
|
|
|
return log_error_errno(r, "Failed to open '%s': %m", fn);
|
|
}
|
|
log_debug("Reading config file \"%s\"…", fn);
|
|
f = _f;
|
|
}
|
|
|
|
FOREACH_LINE(line, f, break) {
|
|
char *l;
|
|
int k;
|
|
bool invalid_line = false;
|
|
|
|
v++;
|
|
|
|
l = strstrip(line);
|
|
if (IN_SET(*l, 0, '#'))
|
|
continue;
|
|
|
|
k = parse_line(fn, v, l, &invalid_line);
|
|
if (k < 0) {
|
|
if (invalid_line)
|
|
/* Allow reporting with a special code if the caller requested this */
|
|
*invalid_config = true;
|
|
else if (r == 0)
|
|
/* The first error becomes our return value */
|
|
r = k;
|
|
}
|
|
}
|
|
|
|
/* we have to determine age parameter for each entry of type X */
|
|
ORDERED_HASHMAP_FOREACH(i, globs, iterator) {
|
|
Iterator iter;
|
|
Item *j, *candidate_item = NULL;
|
|
|
|
if (i->type != IGNORE_DIRECTORY_PATH)
|
|
continue;
|
|
|
|
ORDERED_HASHMAP_FOREACH(j, items, iter) {
|
|
if (!IN_SET(j->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA))
|
|
continue;
|
|
|
|
if (path_equal(j->path, i->path)) {
|
|
candidate_item = j;
|
|
break;
|
|
}
|
|
|
|
if ((!candidate_item && path_startswith(i->path, j->path)) ||
|
|
(candidate_item && path_startswith(j->path, candidate_item->path) && (fnmatch(i->path, j->path, FNM_PATHNAME | FNM_PERIOD) == 0)))
|
|
candidate_item = j;
|
|
}
|
|
|
|
if (candidate_item && candidate_item->age_set) {
|
|
i->age = candidate_item->age;
|
|
i->age_set = true;
|
|
}
|
|
}
|
|
|
|
if (ferror(f)) {
|
|
log_error_errno(errno, "Failed to read from file %s: %m", fn);
|
|
if (r == 0)
|
|
r = -EIO;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int parse_arguments(char **config_dirs, char **args, bool *invalid_config) {
|
|
char **arg;
|
|
int r;
|
|
|
|
STRV_FOREACH(arg, args) {
|
|
r = read_config_file(config_dirs, *arg, false, invalid_config);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int read_config_files(char **config_dirs, char **args, bool *invalid_config) {
|
|
_cleanup_strv_free_ char **files = NULL;
|
|
_cleanup_free_ char *p = NULL;
|
|
char **f;
|
|
int r;
|
|
|
|
r = conf_files_list_with_replacement(arg_root, config_dirs, arg_replace, &files, &p);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
STRV_FOREACH(f, files)
|
|
if (p && path_equal(*f, p)) {
|
|
log_debug("Parsing arguments at position \"%s\"…", *f);
|
|
|
|
r = parse_arguments(config_dirs, args, invalid_config);
|
|
if (r < 0)
|
|
return r;
|
|
} else
|
|
/* Just warn, ignore result otherwise.
|
|
* read_config_file() has some debug output, so no need to print anything. */
|
|
(void) read_config_file(config_dirs, *f, true, invalid_config);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int main(int argc, char *argv[]) {
|
|
int r, k, r_process = 0;
|
|
ItemArray *a;
|
|
Iterator iterator;
|
|
_cleanup_strv_free_ char **config_dirs = NULL;
|
|
bool invalid_config = false;
|
|
|
|
r = parse_argv(argc, argv);
|
|
if (r <= 0)
|
|
goto finish;
|
|
|
|
log_set_target(LOG_TARGET_AUTO);
|
|
log_parse_environment();
|
|
log_open();
|
|
|
|
if (arg_user) {
|
|
r = user_config_paths(&config_dirs);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to initialize configuration directory list: %m");
|
|
goto finish;
|
|
}
|
|
} else {
|
|
config_dirs = strv_split_nulstr(CONF_PATHS_NULSTR("tmpfiles.d"));
|
|
if (!config_dirs) {
|
|
r = log_oom();
|
|
goto finish;
|
|
}
|
|
}
|
|
|
|
if (DEBUG_LOGGING) {
|
|
_cleanup_free_ char *t = NULL;
|
|
|
|
t = strv_join(config_dirs, "\n\t");
|
|
if (t)
|
|
log_debug("Looking for configuration files in (higher priority first):\n\t%s", t);
|
|
}
|
|
|
|
if (arg_cat_config) {
|
|
(void) pager_open(arg_no_pager, false);
|
|
|
|
r = cat_config(config_dirs, argv + optind);
|
|
goto finish;
|
|
}
|
|
|
|
umask(0022);
|
|
|
|
mac_selinux_init();
|
|
|
|
items = ordered_hashmap_new(&string_hash_ops);
|
|
globs = ordered_hashmap_new(&string_hash_ops);
|
|
|
|
if (!items || !globs) {
|
|
r = log_oom();
|
|
goto finish;
|
|
}
|
|
|
|
/* If command line arguments are specified along with --replace, read all
|
|
* configuration files and insert the positional arguments at the specified
|
|
* place. Otherwise, if command line arguments are specified, execute just
|
|
* them, and finally, without --replace= or any positional arguments, just
|
|
* read configuration and execute it.
|
|
*/
|
|
if (arg_replace || optind >= argc)
|
|
r = read_config_files(config_dirs, argv + optind, &invalid_config);
|
|
else
|
|
r = parse_arguments(config_dirs, argv + optind, &invalid_config);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
/* The non-globbing ones usually create things, hence we apply
|
|
* them first */
|
|
ORDERED_HASHMAP_FOREACH(a, items, iterator) {
|
|
k = process_item_array(a);
|
|
if (k < 0 && r_process == 0)
|
|
r_process = k;
|
|
}
|
|
|
|
/* The globbing ones usually alter things, hence we apply them
|
|
* second. */
|
|
ORDERED_HASHMAP_FOREACH(a, globs, iterator) {
|
|
k = process_item_array(a);
|
|
if (k < 0 && r_process == 0)
|
|
r_process = k;
|
|
}
|
|
|
|
finish:
|
|
pager_close();
|
|
|
|
ordered_hashmap_free_with_destructor(items, item_array_free);
|
|
ordered_hashmap_free_with_destructor(globs, item_array_free);
|
|
|
|
free(arg_include_prefixes);
|
|
free(arg_exclude_prefixes);
|
|
free(arg_root);
|
|
|
|
set_free_free(unix_sockets);
|
|
|
|
mac_selinux_finish();
|
|
|
|
if (r < 0 || ERRNO_IS_RESOURCE(-r_process))
|
|
return EXIT_FAILURE;
|
|
else if (invalid_config)
|
|
return EX_DATAERR;
|
|
else if (r_process < 0)
|
|
return EX_CANTCREAT;
|
|
else
|
|
return EXIT_SUCCESS;
|
|
}
|