2189 lines
65 KiB
C
2189 lines
65 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty <of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <fnmatch.h>
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#include "util.h"
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#include "mkdir.h"
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#include "hashmap.h"
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#include "set.h"
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#include "path-util.h"
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#include "path-lookup.h"
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#include "strv.h"
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#include "unit-name.h"
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#include "install.h"
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#include "conf-parser.h"
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#include "conf-files.h"
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#include "specifier.h"
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#include "install-printf.h"
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#include "special.h"
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typedef struct {
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Hashmap *will_install;
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Hashmap *have_installed;
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} InstallContext;
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#define _cleanup_install_context_done_ _cleanup_(install_context_done)
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static int in_search_path(const char *path, char **search) {
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_cleanup_free_ char *parent = NULL;
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int r;
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assert(path);
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r = path_get_parent(path, &parent);
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if (r < 0)
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return r;
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return strv_contains(search, parent);
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}
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static int lookup_paths_init_from_scope(LookupPaths *paths,
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UnitFileScope scope,
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const char *root_dir) {
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assert(paths);
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assert(scope >= 0);
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assert(scope < _UNIT_FILE_SCOPE_MAX);
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zero(*paths);
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return lookup_paths_init(paths,
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scope == UNIT_FILE_SYSTEM ? SYSTEMD_SYSTEM : SYSTEMD_USER,
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scope == UNIT_FILE_USER,
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root_dir,
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NULL, NULL, NULL);
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}
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static int get_config_path(UnitFileScope scope, bool runtime, const char *root_dir, char **ret) {
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char *p = NULL;
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int r;
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assert(scope >= 0);
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assert(scope < _UNIT_FILE_SCOPE_MAX);
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assert(ret);
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switch (scope) {
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case UNIT_FILE_SYSTEM:
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if (root_dir && runtime)
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asprintf(&p, "%s/run/systemd/system", root_dir);
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else if (runtime)
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p = strdup("/run/systemd/system");
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else if (root_dir)
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asprintf(&p, "%s/%s", root_dir, SYSTEM_CONFIG_UNIT_PATH);
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else
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p = strdup(SYSTEM_CONFIG_UNIT_PATH);
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break;
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case UNIT_FILE_GLOBAL:
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if (root_dir)
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return -EINVAL;
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if (runtime)
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p = strdup("/run/systemd/user");
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else
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p = strdup(USER_CONFIG_UNIT_PATH);
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break;
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case UNIT_FILE_USER:
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if (root_dir || runtime)
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return -EINVAL;
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r = user_config_home(&p);
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if (r <= 0)
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return r < 0 ? r : -ENOENT;
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break;
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default:
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assert_not_reached("Bad scope");
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}
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if (!p)
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return -ENOMEM;
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*ret = p;
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return 0;
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}
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static int add_file_change(
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UnitFileChange **changes,
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unsigned *n_changes,
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UnitFileChangeType type,
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const char *path,
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const char *source) {
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UnitFileChange *c;
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unsigned i;
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assert(path);
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assert(!changes == !n_changes);
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if (!changes)
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return 0;
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c = realloc(*changes, (*n_changes + 1) * sizeof(UnitFileChange));
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if (!c)
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return -ENOMEM;
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*changes = c;
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i = *n_changes;
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c[i].type = type;
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c[i].path = strdup(path);
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if (!c[i].path)
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return -ENOMEM;
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path_kill_slashes(c[i].path);
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if (source) {
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c[i].source = strdup(source);
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if (!c[i].source) {
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free(c[i].path);
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return -ENOMEM;
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}
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path_kill_slashes(c[i].path);
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} else
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c[i].source = NULL;
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*n_changes = i+1;
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return 0;
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}
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static int mark_symlink_for_removal(
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Set **remove_symlinks_to,
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const char *p) {
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char *n;
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int r;
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assert(p);
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r = set_ensure_allocated(remove_symlinks_to, string_hash_func, string_compare_func);
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if (r < 0)
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return r;
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n = strdup(p);
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if (!n)
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return -ENOMEM;
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path_kill_slashes(n);
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r = set_consume(*remove_symlinks_to, n);
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if (r < 0)
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return r == -EEXIST ? 0 : r;
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return 0;
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}
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static int remove_marked_symlinks_fd(
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Set *remove_symlinks_to,
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int fd,
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const char *path,
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const char *config_path,
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bool *deleted,
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UnitFileChange **changes,
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unsigned *n_changes,
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char** instance_whitelist) {
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_cleanup_closedir_ DIR *d = NULL;
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int r = 0;
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assert(remove_symlinks_to);
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assert(fd >= 0);
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assert(path);
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assert(config_path);
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assert(deleted);
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d = fdopendir(fd);
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if (!d) {
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safe_close(fd);
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return -errno;
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}
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rewinddir(d);
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for (;;) {
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struct dirent *de;
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errno = 0;
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de = readdir(d);
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if (!de && errno != 0) {
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r = -errno;
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break;
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}
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if (!de)
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break;
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if (ignore_file(de->d_name))
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continue;
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dirent_ensure_type(d, de);
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if (de->d_type == DT_DIR) {
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int nfd, q;
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_cleanup_free_ char *p = NULL;
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nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
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if (nfd < 0) {
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if (errno == ENOENT)
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continue;
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if (r == 0)
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r = -errno;
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continue;
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}
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p = path_make_absolute(de->d_name, path);
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if (!p) {
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safe_close(nfd);
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return -ENOMEM;
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}
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/* This will close nfd, regardless whether it succeeds or not */
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q = remove_marked_symlinks_fd(remove_symlinks_to, nfd, p, config_path, deleted, changes, n_changes, instance_whitelist);
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if (q < 0 && r == 0)
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r = q;
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} else if (de->d_type == DT_LNK) {
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_cleanup_free_ char *p = NULL, *dest = NULL;
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int q;
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bool found;
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if (!unit_name_is_valid(de->d_name, TEMPLATE_VALID))
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continue;
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if (unit_name_is_instance(de->d_name) &&
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instance_whitelist &&
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!strv_contains(instance_whitelist, de->d_name)) {
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_cleanup_free_ char *w;
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/* OK, the file is not listed directly
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* in the whitelist, so let's check if
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* the template of it might be
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* listed. */
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w = unit_name_template(de->d_name);
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if (!w)
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return -ENOMEM;
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if (!strv_contains(instance_whitelist, w))
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continue;
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}
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p = path_make_absolute(de->d_name, path);
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if (!p)
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return -ENOMEM;
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q = readlink_and_canonicalize(p, &dest);
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if (q < 0) {
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if (q == -ENOENT)
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continue;
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if (r == 0)
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r = q;
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continue;
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}
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found =
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set_get(remove_symlinks_to, dest) ||
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set_get(remove_symlinks_to, basename(dest));
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if (!found)
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continue;
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if (unlink(p) < 0 && errno != ENOENT) {
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if (r == 0)
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r = -errno;
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continue;
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}
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path_kill_slashes(p);
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rmdir_parents(p, config_path);
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add_file_change(changes, n_changes, UNIT_FILE_UNLINK, p, NULL);
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if (!set_get(remove_symlinks_to, p)) {
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q = mark_symlink_for_removal(&remove_symlinks_to, p);
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if (q < 0) {
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if (r == 0)
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r = q;
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} else
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*deleted = true;
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}
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}
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}
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return r;
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}
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static int remove_marked_symlinks(
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Set *remove_symlinks_to,
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const char *config_path,
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UnitFileChange **changes,
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unsigned *n_changes,
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char** instance_whitelist) {
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_cleanup_close_ int fd = -1;
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int r = 0;
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bool deleted;
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assert(config_path);
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if (set_size(remove_symlinks_to) <= 0)
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return 0;
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fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
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if (fd < 0)
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return -errno;
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do {
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int q, cfd;
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deleted = false;
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cfd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
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if (cfd < 0) {
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r = -errno;
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break;
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}
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/* This takes possession of cfd and closes it */
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q = remove_marked_symlinks_fd(remove_symlinks_to, cfd, config_path, config_path, &deleted, changes, n_changes, instance_whitelist);
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if (r == 0)
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r = q;
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} while (deleted);
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return r;
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}
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static int find_symlinks_fd(
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const char *name,
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int fd,
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const char *path,
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const char *config_path,
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bool *same_name_link) {
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int r = 0;
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_cleanup_closedir_ DIR *d = NULL;
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assert(name);
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assert(fd >= 0);
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assert(path);
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assert(config_path);
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assert(same_name_link);
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d = fdopendir(fd);
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if (!d) {
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safe_close(fd);
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return -errno;
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}
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for (;;) {
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struct dirent *de;
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errno = 0;
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de = readdir(d);
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if (!de && errno != 0)
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return -errno;
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if (!de)
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return r;
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if (ignore_file(de->d_name))
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continue;
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dirent_ensure_type(d, de);
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if (de->d_type == DT_DIR) {
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int nfd, q;
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_cleanup_free_ char *p = NULL;
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nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
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if (nfd < 0) {
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if (errno == ENOENT)
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continue;
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if (r == 0)
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r = -errno;
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continue;
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}
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p = path_make_absolute(de->d_name, path);
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if (!p) {
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safe_close(nfd);
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return -ENOMEM;
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}
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/* This will close nfd, regardless whether it succeeds or not */
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q = find_symlinks_fd(name, nfd, p, config_path, same_name_link);
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if (q > 0)
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return 1;
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if (r == 0)
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r = q;
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} else if (de->d_type == DT_LNK) {
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_cleanup_free_ char *p = NULL, *dest = NULL;
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bool found_path, found_dest, b = false;
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int q;
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/* Acquire symlink name */
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p = path_make_absolute(de->d_name, path);
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if (!p)
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return -ENOMEM;
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/* Acquire symlink destination */
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q = readlink_and_canonicalize(p, &dest);
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if (q < 0) {
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if (q == -ENOENT)
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continue;
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if (r == 0)
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r = q;
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continue;
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}
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/* Check if the symlink itself matches what we
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* are looking for */
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if (path_is_absolute(name))
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found_path = path_equal(p, name);
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else
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found_path = streq(de->d_name, name);
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|
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/* Check if what the symlink points to
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* matches what we are looking for */
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if (path_is_absolute(name))
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found_dest = path_equal(dest, name);
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else
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found_dest = streq(basename(dest), name);
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if (found_path && found_dest) {
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_cleanup_free_ char *t = NULL;
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|
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/* Filter out same name links in the main
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* config path */
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t = path_make_absolute(name, config_path);
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if (!t)
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return -ENOMEM;
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|
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b = path_equal(t, p);
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}
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|
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if (b)
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*same_name_link = true;
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else if (found_path || found_dest)
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return 1;
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}
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}
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}
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|
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static int find_symlinks(
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const char *name,
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const char *config_path,
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bool *same_name_link) {
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int fd;
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assert(name);
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assert(config_path);
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assert(same_name_link);
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fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
|
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if (fd < 0) {
|
|
if (errno == ENOENT)
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return 0;
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return -errno;
|
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}
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|
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/* This takes possession of fd and closes it */
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return find_symlinks_fd(name, fd, config_path, config_path, same_name_link);
|
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}
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|
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static int find_symlinks_in_scope(
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UnitFileScope scope,
|
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const char *root_dir,
|
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const char *name,
|
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UnitFileState *state) {
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|
|
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int r;
|
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_cleanup_free_ char *path2 = NULL;
|
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bool same_name_link_runtime = false, same_name_link = false;
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|
|
assert(scope >= 0);
|
|
assert(scope < _UNIT_FILE_SCOPE_MAX);
|
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assert(name);
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|
|
|
if (scope == UNIT_FILE_SYSTEM || scope == UNIT_FILE_GLOBAL) {
|
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_cleanup_free_ char *path = NULL;
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|
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/* First look in runtime config path */
|
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r = get_config_path(scope, true, root_dir, &path);
|
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if (r < 0)
|
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return r;
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|
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r = find_symlinks(name, path, &same_name_link_runtime);
|
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if (r < 0)
|
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return r;
|
|
else if (r > 0) {
|
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*state = UNIT_FILE_ENABLED_RUNTIME;
|
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return r;
|
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}
|
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}
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|
|
/* Then look in the normal config path */
|
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r = get_config_path(scope, false, root_dir, &path2);
|
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if (r < 0)
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return r;
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|
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r = find_symlinks(name, path2, &same_name_link);
|
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if (r < 0)
|
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return r;
|
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else if (r > 0) {
|
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*state = UNIT_FILE_ENABLED;
|
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return r;
|
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}
|
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|
|
/* Hmm, we didn't find it, but maybe we found the same name
|
|
* link? */
|
|
if (same_name_link_runtime) {
|
|
*state = UNIT_FILE_LINKED_RUNTIME;
|
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return 1;
|
|
} else if (same_name_link) {
|
|
*state = UNIT_FILE_LINKED;
|
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return 1;
|
|
}
|
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|
|
return 0;
|
|
}
|
|
|
|
int unit_file_mask(
|
|
UnitFileScope scope,
|
|
bool runtime,
|
|
const char *root_dir,
|
|
char **files,
|
|
bool force,
|
|
UnitFileChange **changes,
|
|
unsigned *n_changes) {
|
|
|
|
char **i;
|
|
_cleanup_free_ char *prefix = NULL;
|
|
int r;
|
|
|
|
assert(scope >= 0);
|
|
assert(scope < _UNIT_FILE_SCOPE_MAX);
|
|
|
|
r = get_config_path(scope, runtime, root_dir, &prefix);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
STRV_FOREACH(i, files) {
|
|
_cleanup_free_ char *path = NULL;
|
|
|
|
if (!unit_name_is_valid(*i, TEMPLATE_VALID)) {
|
|
if (r == 0)
|
|
r = -EINVAL;
|
|
continue;
|
|
}
|
|
|
|
path = path_make_absolute(*i, prefix);
|
|
if (!path) {
|
|
r = -ENOMEM;
|
|
break;
|
|
}
|
|
|
|
if (symlink("/dev/null", path) >= 0) {
|
|
add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, "/dev/null");
|
|
continue;
|
|
}
|
|
|
|
if (errno == EEXIST) {
|
|
|
|
if (null_or_empty_path(path) > 0)
|
|
continue;
|
|
|
|
if (force) {
|
|
if (symlink_atomic("/dev/null", path) >= 0) {
|
|
add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
|
|
add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, "/dev/null");
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (r == 0)
|
|
r = -EEXIST;
|
|
} else {
|
|
if (r == 0)
|
|
r = -errno;
|
|
}
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int unit_file_unmask(
|
|
UnitFileScope scope,
|
|
bool runtime,
|
|
const char *root_dir,
|
|
char **files,
|
|
UnitFileChange **changes,
|
|
unsigned *n_changes) {
|
|
|
|
char **i, *config_path = NULL;
|
|
int r, q;
|
|
Set *remove_symlinks_to = NULL;
|
|
|
|
assert(scope >= 0);
|
|
assert(scope < _UNIT_FILE_SCOPE_MAX);
|
|
|
|
r = get_config_path(scope, runtime, root_dir, &config_path);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
STRV_FOREACH(i, files) {
|
|
char *path;
|
|
|
|
if (!unit_name_is_valid(*i, TEMPLATE_VALID)) {
|
|
if (r == 0)
|
|
r = -EINVAL;
|
|
continue;
|
|
}
|
|
|
|
path = path_make_absolute(*i, config_path);
|
|
if (!path) {
|
|
r = -ENOMEM;
|
|
break;
|
|
}
|
|
|
|
q = null_or_empty_path(path);
|
|
if (q > 0) {
|
|
if (unlink(path) >= 0) {
|
|
mark_symlink_for_removal(&remove_symlinks_to, path);
|
|
add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
|
|
|
|
free(path);
|
|
continue;
|
|
}
|
|
|
|
q = -errno;
|
|
}
|
|
|
|
if (q != -ENOENT && r == 0)
|
|
r = q;
|
|
|
|
free(path);
|
|
}
|
|
|
|
|
|
finish:
|
|
q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files);
|
|
if (r == 0)
|
|
r = q;
|
|
|
|
set_free_free(remove_symlinks_to);
|
|
free(config_path);
|
|
|
|
return r;
|
|
}
|
|
|
|
int unit_file_link(
|
|
UnitFileScope scope,
|
|
bool runtime,
|
|
const char *root_dir,
|
|
char **files,
|
|
bool force,
|
|
UnitFileChange **changes,
|
|
unsigned *n_changes) {
|
|
|
|
_cleanup_lookup_paths_free_ LookupPaths paths = {};
|
|
char **i;
|
|
_cleanup_free_ char *config_path = NULL;
|
|
int r, q;
|
|
|
|
assert(scope >= 0);
|
|
assert(scope < _UNIT_FILE_SCOPE_MAX);
|
|
|
|
r = lookup_paths_init_from_scope(&paths, scope, root_dir);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = get_config_path(scope, runtime, root_dir, &config_path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
STRV_FOREACH(i, files) {
|
|
_cleanup_free_ char *path = NULL;
|
|
char *fn;
|
|
struct stat st;
|
|
|
|
fn = basename(*i);
|
|
|
|
if (!path_is_absolute(*i) ||
|
|
!unit_name_is_valid(fn, TEMPLATE_VALID)) {
|
|
if (r == 0)
|
|
r = -EINVAL;
|
|
continue;
|
|
}
|
|
|
|
if (lstat(*i, &st) < 0) {
|
|
if (r == 0)
|
|
r = -errno;
|
|
continue;
|
|
}
|
|
|
|
if (!S_ISREG(st.st_mode)) {
|
|
r = -ENOENT;
|
|
continue;
|
|
}
|
|
|
|
q = in_search_path(*i, paths.unit_path);
|
|
if (q < 0)
|
|
return q;
|
|
|
|
if (q > 0)
|
|
continue;
|
|
|
|
path = path_make_absolute(fn, config_path);
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
if (symlink(*i, path) >= 0) {
|
|
add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, *i);
|
|
continue;
|
|
}
|
|
|
|
if (errno == EEXIST) {
|
|
_cleanup_free_ char *dest = NULL;
|
|
|
|
q = readlink_and_make_absolute(path, &dest);
|
|
if (q < 0 && errno != ENOENT) {
|
|
if (r == 0)
|
|
r = q;
|
|
continue;
|
|
}
|
|
|
|
if (q >= 0 && path_equal(dest, *i))
|
|
continue;
|
|
|
|
if (force) {
|
|
if (symlink_atomic(*i, path) >= 0) {
|
|
add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
|
|
add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, *i);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (r == 0)
|
|
r = -EEXIST;
|
|
} else {
|
|
if (r == 0)
|
|
r = -errno;
|
|
}
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
void unit_file_list_free(Hashmap *h) {
|
|
UnitFileList *i;
|
|
|
|
while ((i = hashmap_steal_first(h))) {
|
|
free(i->path);
|
|
free(i);
|
|
}
|
|
|
|
hashmap_free(h);
|
|
}
|
|
|
|
void unit_file_changes_free(UnitFileChange *changes, unsigned n_changes) {
|
|
unsigned i;
|
|
|
|
assert(changes || n_changes == 0);
|
|
|
|
if (!changes)
|
|
return;
|
|
|
|
for (i = 0; i < n_changes; i++) {
|
|
free(changes[i].path);
|
|
free(changes[i].source);
|
|
}
|
|
|
|
free(changes);
|
|
}
|
|
|
|
static void install_info_free(InstallInfo *i) {
|
|
assert(i);
|
|
|
|
free(i->name);
|
|
free(i->path);
|
|
strv_free(i->aliases);
|
|
strv_free(i->wanted_by);
|
|
strv_free(i->required_by);
|
|
free(i->default_instance);
|
|
free(i);
|
|
}
|
|
|
|
static void install_info_hashmap_free(Hashmap *m) {
|
|
InstallInfo *i;
|
|
|
|
if (!m)
|
|
return;
|
|
|
|
while ((i = hashmap_steal_first(m)))
|
|
install_info_free(i);
|
|
|
|
hashmap_free(m);
|
|
}
|
|
|
|
static void install_context_done(InstallContext *c) {
|
|
assert(c);
|
|
|
|
install_info_hashmap_free(c->will_install);
|
|
install_info_hashmap_free(c->have_installed);
|
|
|
|
c->will_install = c->have_installed = NULL;
|
|
}
|
|
|
|
static int install_info_add(
|
|
InstallContext *c,
|
|
const char *name,
|
|
const char *path) {
|
|
InstallInfo *i = NULL;
|
|
int r;
|
|
|
|
assert(c);
|
|
assert(name || path);
|
|
|
|
if (!name)
|
|
name = basename(path);
|
|
|
|
if (!unit_name_is_valid(name, TEMPLATE_VALID))
|
|
return -EINVAL;
|
|
|
|
if (hashmap_get(c->have_installed, name) ||
|
|
hashmap_get(c->will_install, name))
|
|
return 0;
|
|
|
|
r = hashmap_ensure_allocated(&c->will_install, string_hash_func, string_compare_func);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
i = new0(InstallInfo, 1);
|
|
if (!i)
|
|
return -ENOMEM;
|
|
|
|
i->name = strdup(name);
|
|
if (!i->name) {
|
|
r = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
if (path) {
|
|
i->path = strdup(path);
|
|
if (!i->path) {
|
|
r = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
r = hashmap_put(c->will_install, i->name, i);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
if (i)
|
|
install_info_free(i);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int install_info_add_auto(
|
|
InstallContext *c,
|
|
const char *name_or_path) {
|
|
|
|
assert(c);
|
|
assert(name_or_path);
|
|
|
|
if (path_is_absolute(name_or_path))
|
|
return install_info_add(c, NULL, name_or_path);
|
|
else
|
|
return install_info_add(c, name_or_path, NULL);
|
|
}
|
|
|
|
static int config_parse_also(
|
|
const char *unit,
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
unsigned section_line,
|
|
const char *lvalue,
|
|
int ltype,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
char *w;
|
|
size_t l;
|
|
char *state;
|
|
InstallContext *c = data;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
|
|
FOREACH_WORD_QUOTED(w, l, rvalue, state) {
|
|
_cleanup_free_ char *n;
|
|
int r;
|
|
|
|
n = strndup(w, l);
|
|
if (!n)
|
|
return -ENOMEM;
|
|
|
|
r = install_info_add(c, n, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int config_parse_user(
|
|
const char *unit,
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
unsigned section_line,
|
|
const char *lvalue,
|
|
int ltype,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
InstallInfo *i = data;
|
|
char *printed;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
|
|
r = install_full_printf(i, rvalue, &printed);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
free(i->user);
|
|
i->user = printed;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int config_parse_default_instance(
|
|
const char *unit,
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
unsigned section_line,
|
|
const char *lvalue,
|
|
int ltype,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
InstallInfo *i = data;
|
|
char *printed;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
|
|
r = install_full_printf(i, rvalue, &printed);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (!unit_instance_is_valid(printed))
|
|
return -EINVAL;
|
|
|
|
free(i->default_instance);
|
|
i->default_instance = printed;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int unit_file_load(
|
|
InstallContext *c,
|
|
InstallInfo *info,
|
|
const char *path,
|
|
const char *root_dir,
|
|
bool allow_symlink) {
|
|
|
|
const ConfigTableItem items[] = {
|
|
{ "Install", "Alias", config_parse_strv, 0, &info->aliases },
|
|
{ "Install", "WantedBy", config_parse_strv, 0, &info->wanted_by },
|
|
{ "Install", "RequiredBy", config_parse_strv, 0, &info->required_by },
|
|
{ "Install", "DefaultInstance", config_parse_default_instance, 0, info },
|
|
{ "Install", "Also", config_parse_also, 0, c },
|
|
{ "Exec", "User", config_parse_user, 0, info },
|
|
{}
|
|
};
|
|
|
|
_cleanup_fclose_ FILE *f = NULL;
|
|
int fd, r;
|
|
|
|
assert(c);
|
|
assert(info);
|
|
assert(path);
|
|
|
|
if (!isempty(root_dir))
|
|
path = strappenda3(root_dir, "/", path);
|
|
|
|
fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|(allow_symlink ? 0 : O_NOFOLLOW));
|
|
if (fd < 0)
|
|
return -errno;
|
|
|
|
f = fdopen(fd, "re");
|
|
if (!f) {
|
|
safe_close(fd);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
r = config_parse(NULL, path, f, NULL, config_item_table_lookup, items, true, true, info);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return
|
|
(int) strv_length(info->aliases) +
|
|
(int) strv_length(info->wanted_by) +
|
|
(int) strv_length(info->required_by);
|
|
}
|
|
|
|
static int unit_file_search(
|
|
InstallContext *c,
|
|
InstallInfo *info,
|
|
LookupPaths *paths,
|
|
const char *root_dir,
|
|
bool allow_symlink) {
|
|
|
|
char **p;
|
|
int r;
|
|
|
|
assert(c);
|
|
assert(info);
|
|
assert(paths);
|
|
|
|
if (info->path)
|
|
return unit_file_load(c, info, info->path, root_dir, allow_symlink);
|
|
|
|
assert(info->name);
|
|
|
|
STRV_FOREACH(p, paths->unit_path) {
|
|
_cleanup_free_ char *path = NULL;
|
|
|
|
path = strjoin(*p, "/", info->name, NULL);
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
r = unit_file_load(c, info, path, root_dir, allow_symlink);
|
|
if (r >= 0) {
|
|
info->path = path;
|
|
path = NULL;
|
|
return r;
|
|
}
|
|
if (r != -ENOENT && r != -ELOOP)
|
|
return r;
|
|
}
|
|
|
|
if (unit_name_is_instance(info->name)) {
|
|
|
|
/* Unit file doesn't exist, however instance
|
|
* enablement was requested. We will check if it is
|
|
* possible to load template unit file. */
|
|
|
|
_cleanup_free_ char *template = NULL;
|
|
|
|
template = unit_name_template(info->name);
|
|
if (!template)
|
|
return -ENOMEM;
|
|
|
|
STRV_FOREACH(p, paths->unit_path) {
|
|
_cleanup_free_ char *path = NULL;
|
|
|
|
path = strjoin(*p, "/", template, NULL);
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
r = unit_file_load(c, info, path, root_dir, allow_symlink);
|
|
if (r >= 0) {
|
|
info->path = path;
|
|
path = NULL;
|
|
return r;
|
|
}
|
|
if (r != -ENOENT && r != -ELOOP)
|
|
return r;
|
|
}
|
|
}
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
static int unit_file_can_install(
|
|
LookupPaths *paths,
|
|
const char *root_dir,
|
|
const char *name,
|
|
bool allow_symlink) {
|
|
|
|
_cleanup_install_context_done_ InstallContext c = {};
|
|
InstallInfo *i;
|
|
int r;
|
|
|
|
assert(paths);
|
|
assert(name);
|
|
|
|
r = install_info_add_auto(&c, name);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
assert_se(i = hashmap_first(c.will_install));
|
|
|
|
r = unit_file_search(&c, i, paths, root_dir, allow_symlink);
|
|
|
|
if (r >= 0)
|
|
r =
|
|
(int) strv_length(i->aliases) +
|
|
(int) strv_length(i->wanted_by) +
|
|
(int) strv_length(i->required_by);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int create_symlink(
|
|
const char *old_path,
|
|
const char *new_path,
|
|
bool force,
|
|
UnitFileChange **changes,
|
|
unsigned *n_changes) {
|
|
|
|
_cleanup_free_ char *dest = NULL;
|
|
int r;
|
|
|
|
assert(old_path);
|
|
assert(new_path);
|
|
|
|
mkdir_parents_label(new_path, 0755);
|
|
|
|
if (symlink(old_path, new_path) >= 0) {
|
|
add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path);
|
|
return 0;
|
|
}
|
|
|
|
if (errno != EEXIST)
|
|
return -errno;
|
|
|
|
r = readlink_and_make_absolute(new_path, &dest);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (path_equal(dest, old_path))
|
|
return 0;
|
|
|
|
if (!force)
|
|
return -EEXIST;
|
|
|
|
r = symlink_atomic(old_path, new_path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
add_file_change(changes, n_changes, UNIT_FILE_UNLINK, new_path, NULL);
|
|
add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int install_info_symlink_alias(
|
|
InstallInfo *i,
|
|
const char *config_path,
|
|
bool force,
|
|
UnitFileChange **changes,
|
|
unsigned *n_changes) {
|
|
|
|
char **s;
|
|
int r = 0, q;
|
|
|
|
assert(i);
|
|
assert(config_path);
|
|
|
|
STRV_FOREACH(s, i->aliases) {
|
|
_cleanup_free_ char *alias_path = NULL, *dst = NULL;
|
|
|
|
q = install_full_printf(i, *s, &dst);
|
|
if (q < 0)
|
|
return q;
|
|
|
|
alias_path = path_make_absolute(dst, config_path);
|
|
if (!alias_path)
|
|
return -ENOMEM;
|
|
|
|
q = create_symlink(i->path, alias_path, force, changes, n_changes);
|
|
if (r == 0)
|
|
r = q;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int install_info_symlink_wants(
|
|
InstallInfo *i,
|
|
const char *config_path,
|
|
char **list,
|
|
const char *suffix,
|
|
bool force,
|
|
UnitFileChange **changes,
|
|
unsigned *n_changes) {
|
|
|
|
_cleanup_free_ char *buf = NULL;
|
|
const char *n;
|
|
char **s;
|
|
int r = 0, q;
|
|
|
|
assert(i);
|
|
assert(config_path);
|
|
|
|
if (unit_name_is_template(i->name)) {
|
|
|
|
/* Don't install any symlink if there's no default
|
|
* instance configured */
|
|
|
|
if (!i->default_instance)
|
|
return 0;
|
|
|
|
buf = unit_name_replace_instance(i->name, i->default_instance);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
n = buf;
|
|
} else
|
|
n = i->name;
|
|
|
|
STRV_FOREACH(s, list) {
|
|
_cleanup_free_ char *path = NULL, *dst = NULL;
|
|
|
|
q = install_full_printf(i, *s, &dst);
|
|
if (q < 0)
|
|
return q;
|
|
|
|
if (!unit_name_is_valid(dst, TEMPLATE_VALID)) {
|
|
r = -EINVAL;
|
|
continue;
|
|
}
|
|
|
|
path = strjoin(config_path, "/", dst, suffix, n, NULL);
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
q = create_symlink(i->path, path, force, changes, n_changes);
|
|
if (r == 0)
|
|
r = q;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int install_info_symlink_link(
|
|
InstallInfo *i,
|
|
LookupPaths *paths,
|
|
const char *config_path,
|
|
const char *root_dir,
|
|
bool force,
|
|
UnitFileChange **changes,
|
|
unsigned *n_changes) {
|
|
|
|
_cleanup_free_ char *path = NULL;
|
|
int r;
|
|
|
|
assert(i);
|
|
assert(paths);
|
|
assert(config_path);
|
|
assert(i->path);
|
|
|
|
r = in_search_path(i->path, paths->unit_path);
|
|
if (r != 0)
|
|
return r;
|
|
|
|
path = strjoin(config_path, "/", i->name, NULL);
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
return create_symlink(i->path, path, force, changes, n_changes);
|
|
}
|
|
|
|
static int install_info_apply(
|
|
InstallInfo *i,
|
|
LookupPaths *paths,
|
|
const char *config_path,
|
|
const char *root_dir,
|
|
bool force,
|
|
UnitFileChange **changes,
|
|
unsigned *n_changes) {
|
|
|
|
int r, q;
|
|
|
|
assert(i);
|
|
assert(paths);
|
|
assert(config_path);
|
|
|
|
r = install_info_symlink_alias(i, config_path, force, changes, n_changes);
|
|
|
|
q = install_info_symlink_wants(i, config_path, i->wanted_by, ".wants/", force, changes, n_changes);
|
|
if (r == 0)
|
|
r = q;
|
|
|
|
q = install_info_symlink_wants(i, config_path, i->required_by, ".requires/", force, changes, n_changes);
|
|
if (r == 0)
|
|
r = q;
|
|
|
|
q = install_info_symlink_link(i, paths, config_path, root_dir, force, changes, n_changes);
|
|
if (r == 0)
|
|
r = q;
|
|
|
|
return r;
|
|
}
|
|
|
|
static int install_context_apply(
|
|
InstallContext *c,
|
|
LookupPaths *paths,
|
|
const char *config_path,
|
|
const char *root_dir,
|
|
bool force,
|
|
UnitFileChange **changes,
|
|
unsigned *n_changes) {
|
|
|
|
InstallInfo *i;
|
|
int r = 0, q;
|
|
|
|
assert(c);
|
|
assert(paths);
|
|
assert(config_path);
|
|
|
|
while ((i = hashmap_first(c->will_install))) {
|
|
|
|
q = hashmap_ensure_allocated(&c->have_installed, string_hash_func, string_compare_func);
|
|
if (q < 0)
|
|
return q;
|
|
|
|
assert_se(hashmap_move_one(c->have_installed, c->will_install, i->name) == 0);
|
|
|
|
q = unit_file_search(c, i, paths, root_dir, false);
|
|
if (q < 0) {
|
|
if (r >= 0)
|
|
r = q;
|
|
|
|
return r;
|
|
} else if (r >= 0)
|
|
r += q;
|
|
|
|
q = install_info_apply(i, paths, config_path, root_dir, force, changes, n_changes);
|
|
if (r >= 0 && q < 0)
|
|
r = q;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int install_context_mark_for_removal(
|
|
InstallContext *c,
|
|
LookupPaths *paths,
|
|
Set **remove_symlinks_to,
|
|
const char *config_path,
|
|
const char *root_dir) {
|
|
|
|
InstallInfo *i;
|
|
int r = 0, q;
|
|
|
|
assert(c);
|
|
assert(paths);
|
|
assert(config_path);
|
|
|
|
/* Marks all items for removal */
|
|
|
|
while ((i = hashmap_first(c->will_install))) {
|
|
|
|
q = hashmap_ensure_allocated(&c->have_installed, string_hash_func, string_compare_func);
|
|
if (q < 0)
|
|
return q;
|
|
|
|
assert_se(hashmap_move_one(c->have_installed, c->will_install, i->name) == 0);
|
|
|
|
q = unit_file_search(c, i, paths, root_dir, false);
|
|
if (q == -ENOENT) {
|
|
/* do nothing */
|
|
} else if (q < 0) {
|
|
if (r >= 0)
|
|
r = q;
|
|
|
|
return r;
|
|
} else if (r >= 0)
|
|
r += q;
|
|
|
|
if (unit_name_is_instance(i->name)) {
|
|
char *unit_file;
|
|
|
|
if (i->path) {
|
|
unit_file = basename(i->path);
|
|
|
|
if (unit_name_is_instance(unit_file))
|
|
/* unit file named as instance exists, thus all symlinks
|
|
* pointing to it will be removed */
|
|
q = mark_symlink_for_removal(remove_symlinks_to, i->name);
|
|
else
|
|
/* does not exist, thus we will mark for removal symlinks
|
|
* to template unit file */
|
|
q = mark_symlink_for_removal(remove_symlinks_to, unit_file);
|
|
} else {
|
|
/* If i->path is not set, it means that we didn't actually find
|
|
* the unit file. But we can still remove symlinks to the
|
|
* nonexistent template. */
|
|
unit_file = unit_name_template(i->name);
|
|
if (!unit_file)
|
|
return log_oom();
|
|
|
|
q = mark_symlink_for_removal(remove_symlinks_to, unit_file);
|
|
free(unit_file);
|
|
}
|
|
} else
|
|
q = mark_symlink_for_removal(remove_symlinks_to, i->name);
|
|
|
|
if (r >= 0 && q < 0)
|
|
r = q;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int unit_file_enable(
|
|
UnitFileScope scope,
|
|
bool runtime,
|
|
const char *root_dir,
|
|
char **files,
|
|
bool force,
|
|
UnitFileChange **changes,
|
|
unsigned *n_changes) {
|
|
|
|
_cleanup_lookup_paths_free_ LookupPaths paths = {};
|
|
_cleanup_install_context_done_ InstallContext c = {};
|
|
char **i;
|
|
_cleanup_free_ char *config_path = NULL;
|
|
int r;
|
|
|
|
assert(scope >= 0);
|
|
assert(scope < _UNIT_FILE_SCOPE_MAX);
|
|
|
|
r = lookup_paths_init_from_scope(&paths, scope, root_dir);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = get_config_path(scope, runtime, root_dir, &config_path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
STRV_FOREACH(i, files) {
|
|
r = install_info_add_auto(&c, *i);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
/* This will return the number of symlink rules that were
|
|
supposed to be created, not the ones actually created. This is
|
|
useful to determine whether the passed files had any
|
|
installation data at all. */
|
|
|
|
return install_context_apply(&c, &paths, config_path, root_dir, force, changes, n_changes);
|
|
}
|
|
|
|
int unit_file_disable(
|
|
UnitFileScope scope,
|
|
bool runtime,
|
|
const char *root_dir,
|
|
char **files,
|
|
UnitFileChange **changes,
|
|
unsigned *n_changes) {
|
|
|
|
_cleanup_lookup_paths_free_ LookupPaths paths = {};
|
|
_cleanup_install_context_done_ InstallContext c = {};
|
|
char **i;
|
|
_cleanup_free_ char *config_path = NULL;
|
|
_cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
|
|
int r, q;
|
|
|
|
assert(scope >= 0);
|
|
assert(scope < _UNIT_FILE_SCOPE_MAX);
|
|
|
|
r = lookup_paths_init_from_scope(&paths, scope, root_dir);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = get_config_path(scope, runtime, root_dir, &config_path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
STRV_FOREACH(i, files) {
|
|
r = install_info_add_auto(&c, *i);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = install_context_mark_for_removal(&c, &paths, &remove_symlinks_to, config_path, root_dir);
|
|
|
|
q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files);
|
|
if (r == 0)
|
|
r = q;
|
|
|
|
return r;
|
|
}
|
|
|
|
int unit_file_reenable(
|
|
UnitFileScope scope,
|
|
bool runtime,
|
|
const char *root_dir,
|
|
char **files,
|
|
bool force,
|
|
UnitFileChange **changes,
|
|
unsigned *n_changes) {
|
|
int r;
|
|
|
|
r = unit_file_disable(scope, runtime, root_dir, files,
|
|
changes, n_changes);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return unit_file_enable(scope, runtime, root_dir, files, force,
|
|
changes, n_changes);
|
|
}
|
|
|
|
int unit_file_set_default(
|
|
UnitFileScope scope,
|
|
const char *root_dir,
|
|
const char *file,
|
|
bool force,
|
|
UnitFileChange **changes,
|
|
unsigned *n_changes) {
|
|
|
|
_cleanup_lookup_paths_free_ LookupPaths paths = {};
|
|
_cleanup_install_context_done_ InstallContext c = {};
|
|
_cleanup_free_ char *config_path = NULL;
|
|
char *path;
|
|
int r;
|
|
InstallInfo *i = NULL;
|
|
|
|
assert(scope >= 0);
|
|
assert(scope < _UNIT_FILE_SCOPE_MAX);
|
|
assert(file);
|
|
|
|
if (unit_name_to_type(file) != UNIT_TARGET)
|
|
return -EINVAL;
|
|
|
|
r = lookup_paths_init_from_scope(&paths, scope, root_dir);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = get_config_path(scope, false, root_dir, &config_path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = install_info_add_auto(&c, file);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
assert_se(i = hashmap_first(c.will_install));
|
|
|
|
r = unit_file_search(&c, i, &paths, root_dir, false);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
path = strappenda(config_path, "/" SPECIAL_DEFAULT_TARGET);
|
|
|
|
r = create_symlink(i->path, path, force, changes, n_changes);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int unit_file_get_default(
|
|
UnitFileScope scope,
|
|
const char *root_dir,
|
|
char **name) {
|
|
|
|
_cleanup_lookup_paths_free_ LookupPaths paths = {};
|
|
char **p;
|
|
int r;
|
|
|
|
assert(scope >= 0);
|
|
assert(scope < _UNIT_FILE_SCOPE_MAX);
|
|
assert(name);
|
|
|
|
r = lookup_paths_init_from_scope(&paths, scope, root_dir);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
STRV_FOREACH(p, paths.unit_path) {
|
|
_cleanup_free_ char *path = NULL, *tmp = NULL;
|
|
char *n;
|
|
|
|
if (isempty(root_dir))
|
|
path = strappend(*p, "/" SPECIAL_DEFAULT_TARGET);
|
|
else
|
|
path = strjoin(root_dir, "/", *p, "/" SPECIAL_DEFAULT_TARGET, NULL);
|
|
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
r = readlink_malloc(path, &tmp);
|
|
if (r == -ENOENT)
|
|
continue;
|
|
else if (r == -EINVAL)
|
|
/* not a symlink */
|
|
n = strdup(SPECIAL_DEFAULT_TARGET);
|
|
else if (r < 0)
|
|
return r;
|
|
else
|
|
n = strdup(basename(tmp));
|
|
|
|
if (!n)
|
|
return -ENOMEM;
|
|
|
|
*name = n;
|
|
return 0;
|
|
}
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
UnitFileState unit_file_get_state(
|
|
UnitFileScope scope,
|
|
const char *root_dir,
|
|
const char *name) {
|
|
|
|
_cleanup_lookup_paths_free_ LookupPaths paths = {};
|
|
UnitFileState state = _UNIT_FILE_STATE_INVALID;
|
|
char **i;
|
|
_cleanup_free_ char *path = NULL;
|
|
int r;
|
|
|
|
assert(scope >= 0);
|
|
assert(scope < _UNIT_FILE_SCOPE_MAX);
|
|
assert(name);
|
|
|
|
if (root_dir && scope != UNIT_FILE_SYSTEM)
|
|
return -EINVAL;
|
|
|
|
if (!unit_name_is_valid(name, TEMPLATE_VALID))
|
|
return -EINVAL;
|
|
|
|
r = lookup_paths_init_from_scope(&paths, scope, root_dir);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
STRV_FOREACH(i, paths.unit_path) {
|
|
struct stat st;
|
|
char *partial;
|
|
|
|
free(path);
|
|
path = NULL;
|
|
|
|
if (root_dir)
|
|
asprintf(&path, "%s/%s/%s", root_dir, *i, name);
|
|
else
|
|
asprintf(&path, "%s/%s", *i, name);
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
if (root_dir)
|
|
partial = path + strlen(root_dir) + 1;
|
|
else
|
|
partial = path;
|
|
|
|
/*
|
|
* Search for a unit file in our default paths, to
|
|
* be sure, that there are no broken symlinks.
|
|
*/
|
|
if (lstat(path, &st) < 0) {
|
|
r = -errno;
|
|
if (errno != ENOENT)
|
|
return r;
|
|
|
|
if (!unit_name_is_instance(name))
|
|
continue;
|
|
} else {
|
|
if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode))
|
|
return -ENOENT;
|
|
|
|
r = null_or_empty_path(path);
|
|
if (r < 0 && r != -ENOENT)
|
|
return r;
|
|
else if (r > 0) {
|
|
state = path_startswith(*i, "/run") ?
|
|
UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED;
|
|
return state;
|
|
}
|
|
}
|
|
|
|
r = find_symlinks_in_scope(scope, root_dir, name, &state);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
return state;
|
|
|
|
r = unit_file_can_install(&paths, root_dir, partial, true);
|
|
if (r < 0 && errno != ENOENT)
|
|
return r;
|
|
else if (r > 0)
|
|
return UNIT_FILE_DISABLED;
|
|
else if (r == 0)
|
|
return UNIT_FILE_STATIC;
|
|
}
|
|
|
|
return r < 0 ? r : state;
|
|
}
|
|
|
|
int unit_file_query_preset(UnitFileScope scope, const char *root_dir, const char *name) {
|
|
_cleanup_strv_free_ char **files = NULL;
|
|
char **p;
|
|
int r;
|
|
|
|
assert(scope >= 0);
|
|
assert(scope < _UNIT_FILE_SCOPE_MAX);
|
|
assert(name);
|
|
|
|
if (scope == UNIT_FILE_SYSTEM)
|
|
r = conf_files_list(&files, ".preset", root_dir,
|
|
"/etc/systemd/system-preset",
|
|
"/usr/local/lib/systemd/system-preset",
|
|
"/usr/lib/systemd/system-preset",
|
|
#ifdef HAVE_SPLIT_USR
|
|
"/lib/systemd/system-preset",
|
|
#endif
|
|
NULL);
|
|
else if (scope == UNIT_FILE_GLOBAL)
|
|
r = conf_files_list(&files, ".preset", root_dir,
|
|
"/etc/systemd/user-preset",
|
|
"/usr/local/lib/systemd/user-preset",
|
|
"/usr/lib/systemd/user-preset",
|
|
NULL);
|
|
else
|
|
return 1;
|
|
|
|
if (r < 0)
|
|
return r;
|
|
|
|
STRV_FOREACH(p, files) {
|
|
_cleanup_fclose_ FILE *f;
|
|
|
|
f = fopen(*p, "re");
|
|
if (!f) {
|
|
if (errno == ENOENT)
|
|
continue;
|
|
|
|
return -errno;
|
|
}
|
|
|
|
for (;;) {
|
|
char line[LINE_MAX], *l;
|
|
|
|
if (!fgets(line, sizeof(line), f))
|
|
break;
|
|
|
|
l = strstrip(line);
|
|
if (!*l)
|
|
continue;
|
|
|
|
if (strchr(COMMENTS "\n", *l))
|
|
continue;
|
|
|
|
if (first_word(l, "enable")) {
|
|
l += 6;
|
|
l += strspn(l, WHITESPACE);
|
|
|
|
if (fnmatch(l, name, FNM_NOESCAPE) == 0) {
|
|
log_debug("Preset file says enable %s.", name);
|
|
return 1;
|
|
}
|
|
|
|
} else if (first_word(l, "disable")) {
|
|
l += 7;
|
|
l += strspn(l, WHITESPACE);
|
|
|
|
if (fnmatch(l, name, FNM_NOESCAPE) == 0) {
|
|
log_debug("Preset file says disable %s.", name);
|
|
return 0;
|
|
}
|
|
|
|
} else
|
|
log_debug("Couldn't parse line '%s'", l);
|
|
}
|
|
}
|
|
|
|
/* Default is "enable" */
|
|
log_debug("Preset file doesn't say anything about %s, enabling.", name);
|
|
return 1;
|
|
}
|
|
|
|
int unit_file_preset(
|
|
UnitFileScope scope,
|
|
bool runtime,
|
|
const char *root_dir,
|
|
char **files,
|
|
UnitFilePresetMode mode,
|
|
bool force,
|
|
UnitFileChange **changes,
|
|
unsigned *n_changes) {
|
|
|
|
_cleanup_install_context_done_ InstallContext plus = {}, minus = {};
|
|
_cleanup_lookup_paths_free_ LookupPaths paths = {};
|
|
_cleanup_free_ char *config_path = NULL;
|
|
char **i;
|
|
int r, q;
|
|
|
|
assert(scope >= 0);
|
|
assert(scope < _UNIT_FILE_SCOPE_MAX);
|
|
assert(mode < _UNIT_FILE_PRESET_MODE_MAX);
|
|
|
|
r = lookup_paths_init_from_scope(&paths, scope, root_dir);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = get_config_path(scope, runtime, root_dir, &config_path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
STRV_FOREACH(i, files) {
|
|
|
|
if (!unit_name_is_valid(*i, TEMPLATE_VALID))
|
|
return -EINVAL;
|
|
|
|
r = unit_file_query_preset(scope, root_dir, *i);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (r && mode != UNIT_FILE_PRESET_DISABLE_ONLY)
|
|
r = install_info_add_auto(&plus, *i);
|
|
else if (!r && mode != UNIT_FILE_PRESET_ENABLE_ONLY)
|
|
r = install_info_add_auto(&minus, *i);
|
|
else
|
|
r = 0;
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = 0;
|
|
|
|
if (mode != UNIT_FILE_PRESET_ENABLE_ONLY) {
|
|
_cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
|
|
|
|
r = install_context_mark_for_removal(&minus, &paths, &remove_symlinks_to, config_path, root_dir);
|
|
|
|
q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files);
|
|
if (r == 0)
|
|
r = q;
|
|
}
|
|
|
|
if (mode != UNIT_FILE_PRESET_DISABLE_ONLY) {
|
|
/* Returns number of symlinks that where supposed to be installed. */
|
|
q = install_context_apply(&plus, &paths, config_path, root_dir, force, changes, n_changes);
|
|
if (r == 0)
|
|
r = q;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int unit_file_preset_all(
|
|
UnitFileScope scope,
|
|
bool runtime,
|
|
const char *root_dir,
|
|
UnitFilePresetMode mode,
|
|
bool force,
|
|
UnitFileChange **changes,
|
|
unsigned *n_changes) {
|
|
|
|
_cleanup_install_context_done_ InstallContext plus = {}, minus = {};
|
|
_cleanup_lookup_paths_free_ LookupPaths paths = {};
|
|
_cleanup_free_ char *config_path = NULL;
|
|
char **i;
|
|
int r, q;
|
|
|
|
assert(scope >= 0);
|
|
assert(scope < _UNIT_FILE_SCOPE_MAX);
|
|
assert(mode < _UNIT_FILE_PRESET_MODE_MAX);
|
|
|
|
r = lookup_paths_init_from_scope(&paths, scope, root_dir);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = get_config_path(scope, runtime, root_dir, &config_path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
STRV_FOREACH(i, paths.unit_path) {
|
|
_cleanup_closedir_ DIR *d = NULL;
|
|
_cleanup_free_ char *buf = NULL;
|
|
const char *units_dir;
|
|
|
|
if (!isempty(root_dir)) {
|
|
buf = strjoin(root_dir, "/", *i, NULL);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
units_dir = buf;
|
|
} else
|
|
units_dir = *i;
|
|
|
|
d = opendir(units_dir);
|
|
if (!d) {
|
|
if (errno == ENOENT)
|
|
continue;
|
|
|
|
return -errno;
|
|
}
|
|
|
|
for (;;) {
|
|
struct dirent *de;
|
|
|
|
errno = 0;
|
|
de = readdir(d);
|
|
if (!de && errno != 0)
|
|
return -errno;
|
|
|
|
if (!de)
|
|
break;
|
|
|
|
if (ignore_file(de->d_name))
|
|
continue;
|
|
|
|
if (!unit_name_is_valid(de->d_name, TEMPLATE_VALID))
|
|
continue;
|
|
|
|
dirent_ensure_type(d, de);
|
|
|
|
if (de->d_type != DT_REG)
|
|
continue;
|
|
|
|
r = unit_file_query_preset(scope, root_dir, de->d_name);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (r && mode != UNIT_FILE_PRESET_DISABLE_ONLY)
|
|
r = install_info_add_auto(&plus, de->d_name);
|
|
else if (!r && mode != UNIT_FILE_PRESET_ENABLE_ONLY)
|
|
r = install_info_add_auto(&minus, de->d_name);
|
|
else
|
|
r = 0;
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
}
|
|
|
|
r = 0;
|
|
|
|
if (mode != UNIT_FILE_PRESET_ENABLE_ONLY) {
|
|
_cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
|
|
|
|
r = install_context_mark_for_removal(&minus, &paths, &remove_symlinks_to, config_path, root_dir);
|
|
|
|
q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, NULL);
|
|
if (r == 0)
|
|
r = q;
|
|
}
|
|
|
|
if (mode != UNIT_FILE_PRESET_DISABLE_ONLY) {
|
|
q = install_context_apply(&plus, &paths, config_path, root_dir, force, changes, n_changes);
|
|
if (r == 0)
|
|
r = q;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static void unitfilelist_free(UnitFileList **f) {
|
|
if (!*f)
|
|
return;
|
|
|
|
free((*f)->path);
|
|
free(*f);
|
|
}
|
|
#define _cleanup_unitfilelist_free_ _cleanup_(unitfilelist_free)
|
|
|
|
int unit_file_get_list(
|
|
UnitFileScope scope,
|
|
const char *root_dir,
|
|
Hashmap *h) {
|
|
|
|
_cleanup_lookup_paths_free_ LookupPaths paths = {};
|
|
char **i;
|
|
int r;
|
|
|
|
assert(scope >= 0);
|
|
assert(scope < _UNIT_FILE_SCOPE_MAX);
|
|
assert(h);
|
|
|
|
if (root_dir && scope != UNIT_FILE_SYSTEM)
|
|
return -EINVAL;
|
|
|
|
r = lookup_paths_init_from_scope(&paths, scope, root_dir);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
STRV_FOREACH(i, paths.unit_path) {
|
|
_cleanup_closedir_ DIR *d = NULL;
|
|
_cleanup_free_ char *buf = NULL;
|
|
const char *units_dir;
|
|
|
|
if (!isempty(root_dir)) {
|
|
buf = strjoin(root_dir, "/", *i, NULL);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
units_dir = buf;
|
|
} else
|
|
units_dir = *i;
|
|
|
|
d = opendir(units_dir);
|
|
if (!d) {
|
|
if (errno == ENOENT)
|
|
continue;
|
|
|
|
return -errno;
|
|
}
|
|
|
|
for (;;) {
|
|
_cleanup_unitfilelist_free_ UnitFileList *f = NULL;
|
|
struct dirent *de;
|
|
|
|
errno = 0;
|
|
de = readdir(d);
|
|
if (!de && errno != 0)
|
|
return -errno;
|
|
|
|
if (!de)
|
|
break;
|
|
|
|
if (ignore_file(de->d_name))
|
|
continue;
|
|
|
|
if (!unit_name_is_valid(de->d_name, TEMPLATE_VALID))
|
|
continue;
|
|
|
|
if (hashmap_get(h, de->d_name))
|
|
continue;
|
|
|
|
dirent_ensure_type(d, de);
|
|
|
|
if (!IN_SET(de->d_type, DT_LNK, DT_REG))
|
|
continue;
|
|
|
|
f = new0(UnitFileList, 1);
|
|
if (!f)
|
|
return -ENOMEM;
|
|
|
|
f->path = path_make_absolute(de->d_name, units_dir);
|
|
if (!f->path)
|
|
return -ENOMEM;
|
|
|
|
r = null_or_empty_path(f->path);
|
|
if (r < 0 && r != -ENOENT)
|
|
return r;
|
|
else if (r > 0) {
|
|
f->state =
|
|
path_startswith(*i, "/run") ?
|
|
UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED;
|
|
goto found;
|
|
}
|
|
|
|
r = find_symlinks_in_scope(scope, root_dir, de->d_name, &f->state);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0) {
|
|
f->state = UNIT_FILE_ENABLED;
|
|
goto found;
|
|
}
|
|
|
|
r = unit_file_can_install(&paths, root_dir, f->path, true);
|
|
if (r == -EINVAL || /* Invalid setting? */
|
|
r == -EBADMSG || /* Invalid format? */
|
|
r == -ENOENT /* Included file not found? */)
|
|
f->state = UNIT_FILE_INVALID;
|
|
else if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
f->state = UNIT_FILE_DISABLED;
|
|
else
|
|
f->state = UNIT_FILE_STATIC;
|
|
|
|
found:
|
|
r = hashmap_put(h, basename(f->path), f);
|
|
if (r < 0)
|
|
return r;
|
|
f = NULL; /* prevent cleanup */
|
|
}
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static const char* const unit_file_state_table[_UNIT_FILE_STATE_MAX] = {
|
|
[UNIT_FILE_ENABLED] = "enabled",
|
|
[UNIT_FILE_ENABLED_RUNTIME] = "enabled-runtime",
|
|
[UNIT_FILE_LINKED] = "linked",
|
|
[UNIT_FILE_LINKED_RUNTIME] = "linked-runtime",
|
|
[UNIT_FILE_MASKED] = "masked",
|
|
[UNIT_FILE_MASKED_RUNTIME] = "masked-runtime",
|
|
[UNIT_FILE_STATIC] = "static",
|
|
[UNIT_FILE_DISABLED] = "disabled",
|
|
[UNIT_FILE_INVALID] = "invalid",
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(unit_file_state, UnitFileState);
|
|
|
|
static const char* const unit_file_change_type_table[_UNIT_FILE_CHANGE_TYPE_MAX] = {
|
|
[UNIT_FILE_SYMLINK] = "symlink",
|
|
[UNIT_FILE_UNLINK] = "unlink",
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(unit_file_change_type, UnitFileChangeType);
|
|
|
|
static const char* const unit_file_preset_mode_table[_UNIT_FILE_PRESET_MODE_MAX] = {
|
|
[UNIT_FILE_PRESET_FULL] = "full",
|
|
[UNIT_FILE_PRESET_ENABLE_ONLY] = "enable-only",
|
|
[UNIT_FILE_PRESET_DISABLE_ONLY] = "disable-only",
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(unit_file_preset_mode, UnitFilePresetMode);
|