393 lines
12 KiB
C
393 lines
12 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2010 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 <alloca.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <locale.h>
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#include <stdarg.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 <sys/inotify.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/statfs.h>
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#include <sys/types.h>
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#include <time.h>
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#include <unistd.h>
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#include "formats-util.h"
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#include "macro.h"
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#include "missing.h"
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#include "time-util.h"
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/* What is interpreted as whitespace? */
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#define WHITESPACE " \t\n\r"
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#define NEWLINE "\n\r"
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#define QUOTES "\"\'"
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#define COMMENTS "#;"
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#define GLOB_CHARS "*?["
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size_t page_size(void) _pure_;
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#define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
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#define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
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#define new0(t, n) ((t*) calloc((n), sizeof(t)))
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#define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
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#define newa0(t, n) ((t*) alloca0(sizeof(t)*(n)))
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#define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
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#define malloc0(n) (calloc(1, (n)))
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static inline void *mfree(void *memory) {
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free(memory);
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return NULL;
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}
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static inline const char* yes_no(bool b) {
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return b ? "yes" : "no";
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}
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static inline const char* true_false(bool b) {
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return b ? "true" : "false";
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}
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static inline const char* one_zero(bool b) {
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return b ? "1" : "0";
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}
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bool fstype_is_network(const char *fstype);
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#define xsprintf(buf, fmt, ...) \
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assert_message_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf), \
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"xsprintf: " #buf "[] must be big enough")
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int running_in_chroot(void);
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noreturn void freeze(void);
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void execute_directories(const char* const* directories, usec_t timeout, char *argv[]);
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bool plymouth_running(void);
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bool display_is_local(const char *display) _pure_;
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int socket_from_display(const char *display, char **path);
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int glob_exists(const char *path);
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int glob_extend(char ***strv, const char *path);
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bool is_main_thread(void);
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int block_get_whole_disk(dev_t d, dev_t *ret);
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#define NULSTR_FOREACH(i, l) \
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for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
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#define NULSTR_FOREACH_PAIR(i, j, l) \
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for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
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int ioprio_class_to_string_alloc(int i, char **s);
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int ioprio_class_from_string(const char *s);
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const char *sigchld_code_to_string(int i) _const_;
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int sigchld_code_from_string(const char *s) _pure_;
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int log_facility_unshifted_to_string_alloc(int i, char **s);
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int log_facility_unshifted_from_string(const char *s);
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bool log_facility_unshifted_is_valid(int faciliy);
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int log_level_to_string_alloc(int i, char **s);
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int log_level_from_string(const char *s);
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bool log_level_is_valid(int level);
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int sched_policy_to_string_alloc(int i, char **s);
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int sched_policy_from_string(const char *s);
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extern int saved_argc;
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extern char **saved_argv;
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bool kexec_loaded(void);
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int prot_from_flags(int flags) _const_;
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void* memdup(const void *p, size_t l) _alloc_(2);
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int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
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bool http_url_is_valid(const char *url) _pure_;
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bool documentation_url_is_valid(const char *url) _pure_;
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bool http_etag_is_valid(const char *etag);
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bool in_initrd(void);
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static inline void freep(void *p) {
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free(*(void**) p);
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}
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static inline void umaskp(mode_t *u) {
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umask(*u);
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}
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#define _cleanup_free_ _cleanup_(freep)
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#define _cleanup_umask_ _cleanup_(umaskp)
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#define _cleanup_globfree_ _cleanup_(globfree)
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_malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
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if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
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return NULL;
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return malloc(a * b);
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}
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_alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
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if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
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return NULL;
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return realloc(p, a * b);
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}
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_alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
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if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
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return NULL;
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return memdup(p, a * b);
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}
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/**
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* Check if a string contains any glob patterns.
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*/
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_pure_ static inline bool string_is_glob(const char *p) {
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return !!strpbrk(p, GLOB_CHARS);
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}
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void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
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int (*compar) (const void *, const void *, void *),
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void *arg);
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#define _(String) gettext (String)
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#define N_(String) String
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void init_gettext(void);
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bool is_locale_utf8(void);
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typedef enum DrawSpecialChar {
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DRAW_TREE_VERTICAL,
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DRAW_TREE_BRANCH,
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DRAW_TREE_RIGHT,
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DRAW_TREE_SPACE,
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DRAW_TRIANGULAR_BULLET,
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DRAW_BLACK_CIRCLE,
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DRAW_ARROW,
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DRAW_DASH,
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_DRAW_SPECIAL_CHAR_MAX
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} DrawSpecialChar;
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const char *draw_special_char(DrawSpecialChar ch);
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int on_ac_power(void);
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static inline void *mempset(void *s, int c, size_t n) {
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memset(s, c, n);
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return (uint8_t*)s + n;
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}
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void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
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void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
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#define GREEDY_REALLOC(array, allocated, need) \
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greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
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#define GREEDY_REALLOC0(array, allocated, need) \
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greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
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static inline void _reset_errno_(int *saved_errno) {
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errno = *saved_errno;
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}
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#define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
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static inline int negative_errno(void) {
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/* This helper should be used to shut up gcc if you know 'errno' is
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* negative. Instead of "return -errno;", use "return negative_errno();"
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* It will suppress bogus gcc warnings in case it assumes 'errno' might
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* be 0 and thus the caller's error-handling might not be triggered. */
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assert_return(errno > 0, -EINVAL);
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return -errno;
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}
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struct _umask_struct_ {
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mode_t mask;
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bool quit;
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};
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static inline void _reset_umask_(struct _umask_struct_ *s) {
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umask(s->mask);
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};
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#define RUN_WITH_UMASK(mask) \
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for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
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!_saved_umask_.quit ; \
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_saved_umask_.quit = true)
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static inline unsigned u64log2(uint64_t n) {
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#if __SIZEOF_LONG_LONG__ == 8
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return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
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#else
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#error "Wut?"
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#endif
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}
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static inline unsigned u32ctz(uint32_t n) {
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#if __SIZEOF_INT__ == 4
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return __builtin_ctz(n);
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#else
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#error "Wut?"
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#endif
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}
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static inline unsigned log2i(int x) {
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assert(x > 0);
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return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
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}
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static inline unsigned log2u(unsigned x) {
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assert(x > 0);
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return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
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}
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static inline unsigned log2u_round_up(unsigned x) {
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assert(x > 0);
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if (x == 1)
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return 0;
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return log2u(x - 1) + 1;
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}
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#define DECIMAL_STR_WIDTH(x) \
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({ \
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typeof(x) _x_ = (x); \
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unsigned ans = 1; \
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while (_x_ /= 10) \
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ans++; \
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ans; \
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})
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#define alloca0(n) \
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({ \
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char *_new_; \
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size_t _len_ = n; \
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_new_ = alloca(_len_); \
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(void *) memset(_new_, 0, _len_); \
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})
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/* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */
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#define alloca_align(size, align) \
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({ \
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void *_ptr_; \
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size_t _mask_ = (align) - 1; \
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_ptr_ = alloca((size) + _mask_); \
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(void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \
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})
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#define alloca0_align(size, align) \
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({ \
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void *_new_; \
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size_t _size_ = (size); \
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_new_ = alloca_align(_size_, (align)); \
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(void*)memset(_new_, 0, _size_); \
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})
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bool id128_is_valid(const char *s) _pure_;
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int shall_restore_state(void);
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/**
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* Normal qsort requires base to be nonnull. Here were require
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* that only if nmemb > 0.
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*/
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static inline void qsort_safe(void *base, size_t nmemb, size_t size, comparison_fn_t compar) {
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if (nmemb <= 1)
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return;
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assert(base);
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qsort(base, nmemb, size, compar);
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}
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int proc_cmdline(char **ret);
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int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
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int get_proc_cmdline_key(const char *parameter, char **value);
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int container_get_leader(const char *machine, pid_t *pid);
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int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd);
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int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd);
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#ifndef PERSONALITY_INVALID
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/* personality(7) documents that 0xffffffffUL is used for querying the
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* current personality, hence let's use that here as error
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* indicator. */
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#define PERSONALITY_INVALID 0xffffffffLU
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#endif
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unsigned long personality_from_string(const char *p);
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const char *personality_to_string(unsigned long);
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uint64_t physical_memory(void);
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union file_handle_union {
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struct file_handle handle;
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char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
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};
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#define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ }
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int update_reboot_param_file(const char *param);
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#define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1)
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#define FOREACH_INOTIFY_EVENT(e, buffer, sz) \
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for ((e) = &buffer.ev; \
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(uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \
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(e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len))
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union inotify_event_buffer {
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struct inotify_event ev;
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uint8_t raw[INOTIFY_EVENT_MAX];
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};
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int syslog_parse_priority(const char **p, int *priority, bool with_facility);
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int version(void);
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bool fdname_is_valid(const char *s);
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bool oom_score_adjust_is_valid(int oa);
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