944 lines
32 KiB
C
944 lines
32 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 <time.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <sched.h>
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#include <limits.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <dirent.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <locale.h>
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#include <mntent.h>
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#include <sys/inotify.h>
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#include <sys/statfs.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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#include "formats-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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/* What characters are special in the shell? */
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/* must be escaped outside and inside double-quotes */
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#define SHELL_NEED_ESCAPE "\"\\`$"
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/* can be escaped or double-quoted */
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#define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;"
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#define FORMAT_BYTES_MAX 8
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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 streq(a,b) (strcmp((a),(b)) == 0)
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#define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
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#define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
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#define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
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bool streq_ptr(const char *a, const char *b) _pure_;
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int strcmp_ptr(const char *a, const char *b) _pure_;
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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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static inline const char* strempty(const char *s) {
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return s ? s : "";
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}
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static inline const char* strnull(const char *s) {
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return s ? s : "(null)";
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}
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static inline const char *strna(const char *s) {
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return s ? s : "n/a";
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}
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static inline bool isempty(const char *p) {
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return !p || !p[0];
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}
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static inline char *startswith(const char *s, const char *prefix) {
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size_t l;
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l = strlen(prefix);
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if (strncmp(s, prefix, l) == 0)
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return (char*) s + l;
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return NULL;
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}
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static inline char *startswith_no_case(const char *s, const char *prefix) {
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size_t l;
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l = strlen(prefix);
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if (strncasecmp(s, prefix, l) == 0)
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return (char*) s + l;
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return NULL;
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}
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char *endswith(const char *s, const char *postfix) _pure_;
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char *endswith_no_case(const char *s, const char *postfix) _pure_;
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char *first_word(const char *s, const char *word) _pure_;
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int close_nointr(int fd);
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int safe_close(int fd);
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void safe_close_pair(int p[]);
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void close_many(const int fds[], unsigned n_fd);
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int fclose_nointr(FILE *f);
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FILE* safe_fclose(FILE *f);
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int parse_size(const char *t, off_t base, off_t *size);
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int parse_boolean(const char *v) _pure_;
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int parse_pid(const char *s, pid_t* ret_pid);
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int parse_uid(const char *s, uid_t* ret_uid);
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#define parse_gid(s, ret_gid) parse_uid(s, ret_gid)
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bool uid_is_valid(uid_t uid);
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#define gid_is_valid(gid) uid_is_valid(gid)
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int safe_atou(const char *s, unsigned *ret_u);
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int safe_atoi(const char *s, int *ret_i);
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int safe_atollu(const char *s, unsigned long long *ret_u);
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int safe_atolli(const char *s, long long int *ret_i);
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int safe_atod(const char *s, double *ret_d);
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int safe_atou8(const char *s, uint8_t *ret);
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#if LONG_MAX == INT_MAX
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static inline int safe_atolu(const char *s, unsigned long *ret_u) {
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assert_cc(sizeof(unsigned long) == sizeof(unsigned));
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return safe_atou(s, (unsigned*) ret_u);
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}
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static inline int safe_atoli(const char *s, long int *ret_u) {
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assert_cc(sizeof(long int) == sizeof(int));
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return safe_atoi(s, (int*) ret_u);
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}
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#else
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static inline int safe_atolu(const char *s, unsigned long *ret_u) {
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assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
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return safe_atollu(s, (unsigned long long*) ret_u);
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}
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static inline int safe_atoli(const char *s, long int *ret_u) {
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assert_cc(sizeof(long int) == sizeof(long long int));
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return safe_atolli(s, (long long int*) ret_u);
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}
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#endif
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static inline int safe_atou32(const char *s, uint32_t *ret_u) {
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assert_cc(sizeof(uint32_t) == sizeof(unsigned));
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return safe_atou(s, (unsigned*) ret_u);
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}
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static inline int safe_atoi32(const char *s, int32_t *ret_i) {
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assert_cc(sizeof(int32_t) == sizeof(int));
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return safe_atoi(s, (int*) ret_i);
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}
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static inline int safe_atou64(const char *s, uint64_t *ret_u) {
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assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
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return safe_atollu(s, (unsigned long long*) ret_u);
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}
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static inline int safe_atoi64(const char *s, int64_t *ret_i) {
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assert_cc(sizeof(int64_t) == sizeof(long long int));
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return safe_atolli(s, (long long int*) ret_i);
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}
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int safe_atou16(const char *s, uint16_t *ret);
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int safe_atoi16(const char *s, int16_t *ret);
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const char* split(const char **state, size_t *l, const char *separator, bool quoted);
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#define FOREACH_WORD(word, length, s, state) \
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_FOREACH_WORD(word, length, s, WHITESPACE, false, state)
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#define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
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_FOREACH_WORD(word, length, s, separator, false, state)
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#define FOREACH_WORD_QUOTED(word, length, s, state) \
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_FOREACH_WORD(word, length, s, WHITESPACE, true, state)
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#define _FOREACH_WORD(word, length, s, separator, quoted, state) \
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for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
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char *strappend(const char *s, const char *suffix);
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char *strnappend(const char *s, const char *suffix, size_t length);
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int readlinkat_malloc(int fd, const char *p, char **ret);
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int readlink_malloc(const char *p, char **r);
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int readlink_value(const char *p, char **ret);
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int readlink_and_make_absolute(const char *p, char **r);
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int readlink_and_canonicalize(const char *p, char **r);
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char *strstrip(char *s);
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char *delete_chars(char *s, const char *bad);
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char *truncate_nl(char *s);
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char *file_in_same_dir(const char *path, const char *filename);
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int rmdir_parents(const char *path, const char *stop);
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char hexchar(int x) _const_;
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int unhexchar(char c) _const_;
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char octchar(int x) _const_;
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int unoctchar(char c) _const_;
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char decchar(int x) _const_;
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int undecchar(char c) _const_;
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char base32hexchar(int x) _const_;
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int unbase32hexchar(char c) _const_;
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char base64char(int x) _const_;
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int unbase64char(char c) _const_;
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char *cescape(const char *s);
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size_t cescape_char(char c, char *buf);
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typedef enum UnescapeFlags {
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UNESCAPE_RELAX = 1,
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} UnescapeFlags;
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int cunescape(const char *s, UnescapeFlags flags, char **ret);
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int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret);
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int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret);
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char *xescape(const char *s, const char *bad);
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char *ascii_strlower(char *path);
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bool dirent_is_file(const struct dirent *de) _pure_;
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bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
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bool hidden_file(const char *filename) _pure_;
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bool chars_intersect(const char *a, const char *b) _pure_;
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/* For basic lookup tables with strictly enumerated entries */
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#define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
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scope const char *name##_to_string(type i) { \
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if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
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return NULL; \
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return name##_table[i]; \
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}
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ssize_t string_table_lookup(const char * const *table, size_t len, const char *key);
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#define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
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scope inline type name##_from_string(const char *s) { \
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return (type)string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
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}
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#define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
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_DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
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_DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
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struct __useless_struct_to_allow_trailing_semicolon__
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#define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,)
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#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static)
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#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static)
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#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static)
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/* For string conversions where numbers are also acceptable */
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#define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
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int name##_to_string_alloc(type i, char **str) { \
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char *s; \
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int r; \
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if (i < 0 || i > max) \
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return -ERANGE; \
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if (i < (type) ELEMENTSOF(name##_table)) { \
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s = strdup(name##_table[i]); \
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if (!s) \
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return log_oom(); \
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} else { \
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r = asprintf(&s, "%i", i); \
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if (r < 0) \
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return log_oom(); \
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} \
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*str = s; \
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return 0; \
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} \
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type name##_from_string(const char *s) { \
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type i; \
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unsigned u = 0; \
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assert(s); \
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for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
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if (name##_table[i] && \
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streq(name##_table[i], s)) \
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return i; \
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if (safe_atou(s, &u) >= 0 && u <= max) \
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return (type) u; \
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return (type) -1; \
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} \
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struct __useless_struct_to_allow_trailing_semicolon__
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int fd_nonblock(int fd, bool nonblock);
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int fd_cloexec(int fd, bool cloexec);
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int close_all_fds(const int except[], unsigned n_except);
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bool fstype_is_network(const char *fstype);
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int flush_fd(int fd);
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int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
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ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
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int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll);
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int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
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bool is_device_path(const char *path);
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int dir_is_empty(const char *path);
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char* dirname_malloc(const char *path);
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char* lookup_uid(uid_t uid);
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char* getlogname_malloc(void);
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char* getusername_malloc(void);
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int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
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int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
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bool is_temporary_fs(const struct statfs *s) _pure_;
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int fd_is_temporary_fs(int fd);
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int pipe_eof(int fd);
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DEFINE_TRIVIAL_CLEANUP_FUNC(cpu_set_t*, CPU_FREE);
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#define _cleanup_cpu_free_ _cleanup_(CPU_FREEp)
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cpu_set_t* cpu_set_malloc(unsigned *ncpus);
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#define xsprintf(buf, fmt, ...) assert_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf))
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int files_same(const char *filea, const char *fileb);
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int running_in_chroot(void);
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char *ellipsize(const char *s, size_t length, unsigned percent);
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/* bytes columns */
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char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
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int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
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int touch(const char *path);
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noreturn void freeze(void);
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bool null_or_empty(struct stat *st) _pure_;
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int null_or_empty_path(const char *fn);
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int null_or_empty_fd(int fd);
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DIR *xopendirat(int dirfd, const char *name, int flags);
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char *fstab_node_to_udev_node(const char *p);
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void execute_directories(const char* const* directories, usec_t timeout, char *argv[]);
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bool nulstr_contains(const char*nulstr, const char *needle);
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bool plymouth_running(void);
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char* strshorten(char *s, size_t l);
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int symlink_idempotent(const char *from, const char *to);
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int symlink_atomic(const char *from, const char *to);
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int mknod_atomic(const char *path, mode_t mode, dev_t dev);
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int mkfifo_atomic(const char *path, mode_t mode);
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int fchmod_umask(int fd, mode_t mode);
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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 get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
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int get_group_creds(const char **groupname, gid_t *gid);
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int in_gid(gid_t gid);
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int in_group(const char *name);
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char* uid_to_name(uid_t uid);
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char* gid_to_name(gid_t gid);
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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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int dirent_ensure_type(DIR *d, struct dirent *de);
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int get_files_in_directory(const char *path, char ***list);
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char *strjoin(const char *x, ...) _sentinel_;
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bool is_main_thread(void);
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static inline bool _pure_ in_charset(const char *s, const char* charset) {
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assert(s);
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assert(charset);
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return s[strspn(s, charset)] == '\0';
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}
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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_;
|
|
int sigchld_code_from_string(const char *s) _pure_;
|
|
|
|
int log_facility_unshifted_to_string_alloc(int i, char **s);
|
|
int log_facility_unshifted_from_string(const char *s);
|
|
|
|
int log_level_to_string_alloc(int i, char **s);
|
|
int log_level_from_string(const char *s);
|
|
|
|
int sched_policy_to_string_alloc(int i, char **s);
|
|
int sched_policy_from_string(const char *s);
|
|
|
|
const char *rlimit_to_string(int i) _const_;
|
|
int rlimit_from_string(const char *s) _pure_;
|
|
|
|
int ip_tos_to_string_alloc(int i, char **s);
|
|
int ip_tos_from_string(const char *s);
|
|
|
|
extern int saved_argc;
|
|
extern char **saved_argv;
|
|
|
|
bool kexec_loaded(void);
|
|
|
|
int prot_from_flags(int flags) _const_;
|
|
|
|
char *format_bytes(char *buf, size_t l, off_t t);
|
|
|
|
int fd_wait_for_event(int fd, int event, usec_t timeout);
|
|
|
|
void* memdup(const void *p, size_t l) _alloc_(2);
|
|
|
|
int fd_inc_sndbuf(int fd, size_t n);
|
|
int fd_inc_rcvbuf(int fd, size_t n);
|
|
|
|
int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
|
|
|
|
int setrlimit_closest(int resource, const struct rlimit *rlim);
|
|
|
|
bool http_url_is_valid(const char *url) _pure_;
|
|
bool documentation_url_is_valid(const char *url) _pure_;
|
|
|
|
bool http_etag_is_valid(const char *etag);
|
|
|
|
bool in_initrd(void);
|
|
|
|
int get_home_dir(char **ret);
|
|
int get_shell(char **_ret);
|
|
|
|
static inline void freep(void *p) {
|
|
free(*(void**) p);
|
|
}
|
|
|
|
static inline void closep(int *fd) {
|
|
safe_close(*fd);
|
|
}
|
|
|
|
static inline void umaskp(mode_t *u) {
|
|
umask(*u);
|
|
}
|
|
|
|
static inline void close_pairp(int (*p)[2]) {
|
|
safe_close_pair(*p);
|
|
}
|
|
|
|
static inline void fclosep(FILE **f) {
|
|
safe_fclose(*f);
|
|
}
|
|
|
|
DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
|
|
DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
|
|
DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
|
|
|
|
#define _cleanup_free_ _cleanup_(freep)
|
|
#define _cleanup_close_ _cleanup_(closep)
|
|
#define _cleanup_umask_ _cleanup_(umaskp)
|
|
#define _cleanup_globfree_ _cleanup_(globfree)
|
|
#define _cleanup_fclose_ _cleanup_(fclosep)
|
|
#define _cleanup_pclose_ _cleanup_(pclosep)
|
|
#define _cleanup_closedir_ _cleanup_(closedirp)
|
|
#define _cleanup_endmntent_ _cleanup_(endmntentp)
|
|
#define _cleanup_close_pair_ _cleanup_(close_pairp)
|
|
|
|
_malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
|
|
if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
|
|
return NULL;
|
|
|
|
return malloc(a * b);
|
|
}
|
|
|
|
_alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
|
|
if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
|
|
return NULL;
|
|
|
|
return realloc(p, a * b);
|
|
}
|
|
|
|
_alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
|
|
if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
|
|
return NULL;
|
|
|
|
return memdup(p, a * b);
|
|
}
|
|
|
|
bool filename_is_valid(const char *p) _pure_;
|
|
bool path_is_safe(const char *p) _pure_;
|
|
bool string_is_safe(const char *p) _pure_;
|
|
bool string_has_cc(const char *p, const char *ok) _pure_;
|
|
|
|
/**
|
|
* Check if a string contains any glob patterns.
|
|
*/
|
|
_pure_ static inline bool string_is_glob(const char *p) {
|
|
return !!strpbrk(p, GLOB_CHARS);
|
|
}
|
|
|
|
void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
|
|
int (*compar) (const void *, const void *, void *),
|
|
void *arg);
|
|
|
|
#define _(String) gettext (String)
|
|
#define N_(String) String
|
|
void init_gettext(void);
|
|
bool is_locale_utf8(void);
|
|
|
|
typedef enum DrawSpecialChar {
|
|
DRAW_TREE_VERTICAL,
|
|
DRAW_TREE_BRANCH,
|
|
DRAW_TREE_RIGHT,
|
|
DRAW_TREE_SPACE,
|
|
DRAW_TRIANGULAR_BULLET,
|
|
DRAW_BLACK_CIRCLE,
|
|
DRAW_ARROW,
|
|
DRAW_DASH,
|
|
_DRAW_SPECIAL_CHAR_MAX
|
|
} DrawSpecialChar;
|
|
|
|
const char *draw_special_char(DrawSpecialChar ch);
|
|
|
|
char *strreplace(const char *text, const char *old_string, const char *new_string);
|
|
|
|
char *strip_tab_ansi(char **p, size_t *l);
|
|
|
|
int on_ac_power(void);
|
|
|
|
int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
|
|
int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
|
|
|
|
#define FOREACH_LINE(line, f, on_error) \
|
|
for (;;) \
|
|
if (!fgets(line, sizeof(line), f)) { \
|
|
if (ferror(f)) { \
|
|
on_error; \
|
|
} \
|
|
break; \
|
|
} else
|
|
|
|
#define FOREACH_DIRENT(de, d, on_error) \
|
|
for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
|
|
if (!de) { \
|
|
if (errno > 0) { \
|
|
on_error; \
|
|
} \
|
|
break; \
|
|
} else if (hidden_file((de)->d_name)) \
|
|
continue; \
|
|
else
|
|
|
|
#define FOREACH_DIRENT_ALL(de, d, on_error) \
|
|
for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
|
|
if (!de) { \
|
|
if (errno > 0) { \
|
|
on_error; \
|
|
} \
|
|
break; \
|
|
} else
|
|
|
|
static inline void *mempset(void *s, int c, size_t n) {
|
|
memset(s, c, n);
|
|
return (uint8_t*)s + n;
|
|
}
|
|
|
|
char *hexmem(const void *p, size_t l);
|
|
int unhexmem(const char *p, size_t l, void **mem, size_t *len);
|
|
|
|
char *base32hexmem(const void *p, size_t l, bool padding);
|
|
int unbase32hexmem(const char *p, size_t l, bool padding, void **mem, size_t *len);
|
|
|
|
char *base64mem(const void *p, size_t l);
|
|
int unbase64mem(const char *p, size_t l, void **mem, size_t *len);
|
|
|
|
char *strextend(char **x, ...) _sentinel_;
|
|
char *strrep(const char *s, unsigned n);
|
|
|
|
void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
|
|
void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
|
|
#define GREEDY_REALLOC(array, allocated, need) \
|
|
greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
|
|
|
|
#define GREEDY_REALLOC0(array, allocated, need) \
|
|
greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
|
|
|
|
static inline void _reset_errno_(int *saved_errno) {
|
|
errno = *saved_errno;
|
|
}
|
|
|
|
#define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
|
|
|
|
static inline int negative_errno(void) {
|
|
/* This helper should be used to shut up gcc if you know 'errno' is
|
|
* negative. Instead of "return -errno;", use "return negative_errno();"
|
|
* It will suppress bogus gcc warnings in case it assumes 'errno' might
|
|
* be 0 and thus the caller's error-handling might not be triggered. */
|
|
assert_return(errno > 0, -EINVAL);
|
|
return -errno;
|
|
}
|
|
|
|
struct _umask_struct_ {
|
|
mode_t mask;
|
|
bool quit;
|
|
};
|
|
|
|
static inline void _reset_umask_(struct _umask_struct_ *s) {
|
|
umask(s->mask);
|
|
};
|
|
|
|
#define RUN_WITH_UMASK(mask) \
|
|
for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
|
|
!_saved_umask_.quit ; \
|
|
_saved_umask_.quit = true)
|
|
|
|
static inline unsigned u64log2(uint64_t n) {
|
|
#if __SIZEOF_LONG_LONG__ == 8
|
|
return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
|
|
#else
|
|
#error "Wut?"
|
|
#endif
|
|
}
|
|
|
|
static inline unsigned u32ctz(uint32_t n) {
|
|
#if __SIZEOF_INT__ == 4
|
|
return __builtin_ctz(n);
|
|
#else
|
|
#error "Wut?"
|
|
#endif
|
|
}
|
|
|
|
static inline unsigned log2i(int x) {
|
|
assert(x > 0);
|
|
|
|
return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
|
|
}
|
|
|
|
static inline unsigned log2u(unsigned x) {
|
|
assert(x > 0);
|
|
|
|
return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
|
|
}
|
|
|
|
static inline unsigned log2u_round_up(unsigned x) {
|
|
assert(x > 0);
|
|
|
|
if (x == 1)
|
|
return 0;
|
|
|
|
return log2u(x - 1) + 1;
|
|
}
|
|
|
|
static inline bool logind_running(void) {
|
|
return access("/run/systemd/seats/", F_OK) >= 0;
|
|
}
|
|
|
|
#define DECIMAL_STR_WIDTH(x) \
|
|
({ \
|
|
typeof(x) _x_ = (x); \
|
|
unsigned ans = 1; \
|
|
while (_x_ /= 10) \
|
|
ans++; \
|
|
ans; \
|
|
})
|
|
|
|
int unlink_noerrno(const char *path);
|
|
|
|
#define alloca0(n) \
|
|
({ \
|
|
char *_new_; \
|
|
size_t _len_ = n; \
|
|
_new_ = alloca(_len_); \
|
|
(void *) memset(_new_, 0, _len_); \
|
|
})
|
|
|
|
/* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */
|
|
#define alloca_align(size, align) \
|
|
({ \
|
|
void *_ptr_; \
|
|
size_t _mask_ = (align) - 1; \
|
|
_ptr_ = alloca((size) + _mask_); \
|
|
(void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \
|
|
})
|
|
|
|
#define alloca0_align(size, align) \
|
|
({ \
|
|
void *_new_; \
|
|
size_t _size_ = (size); \
|
|
_new_ = alloca_align(_size_, (align)); \
|
|
(void*)memset(_new_, 0, _size_); \
|
|
})
|
|
|
|
#define strjoina(a, ...) \
|
|
({ \
|
|
const char *_appendees_[] = { a, __VA_ARGS__ }; \
|
|
char *_d_, *_p_; \
|
|
int _len_ = 0; \
|
|
unsigned _i_; \
|
|
for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
|
|
_len_ += strlen(_appendees_[_i_]); \
|
|
_p_ = _d_ = alloca(_len_ + 1); \
|
|
for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
|
|
_p_ = stpcpy(_p_, _appendees_[_i_]); \
|
|
*_p_ = 0; \
|
|
_d_; \
|
|
})
|
|
|
|
bool id128_is_valid(const char *s) _pure_;
|
|
|
|
int split_pair(const char *s, const char *sep, char **l, char **r);
|
|
|
|
int shall_restore_state(void);
|
|
|
|
/**
|
|
* Normal qsort requires base to be nonnull. Here were require
|
|
* that only if nmemb > 0.
|
|
*/
|
|
static inline void qsort_safe(void *base, size_t nmemb, size_t size, comparison_fn_t compar) {
|
|
if (nmemb <= 1)
|
|
return;
|
|
|
|
assert(base);
|
|
qsort(base, nmemb, size, compar);
|
|
}
|
|
|
|
/* Normal memmem() requires haystack to be nonnull, which is annoying for zero-length buffers */
|
|
static inline void *memmem_safe(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen) {
|
|
|
|
if (needlelen <= 0)
|
|
return (void*) haystack;
|
|
|
|
if (haystacklen < needlelen)
|
|
return NULL;
|
|
|
|
assert(haystack);
|
|
assert(needle);
|
|
|
|
return memmem(haystack, haystacklen, needle, needlelen);
|
|
}
|
|
|
|
int proc_cmdline(char **ret);
|
|
int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
|
|
int get_proc_cmdline_key(const char *parameter, char **value);
|
|
|
|
int container_get_leader(const char *machine, pid_t *pid);
|
|
|
|
int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd);
|
|
int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd);
|
|
|
|
int getpeercred(int fd, struct ucred *ucred);
|
|
int getpeersec(int fd, char **ret);
|
|
|
|
int writev_safe(int fd, const struct iovec *w, int j);
|
|
|
|
int mkostemp_safe(char *pattern, int flags);
|
|
int open_tmpfile(const char *path, int flags);
|
|
|
|
int fd_warn_permissions(const char *path, int fd);
|
|
|
|
#ifndef PERSONALITY_INVALID
|
|
/* personality(7) documents that 0xffffffffUL is used for querying the
|
|
* current personality, hence let's use that here as error
|
|
* indicator. */
|
|
#define PERSONALITY_INVALID 0xffffffffLU
|
|
#endif
|
|
|
|
unsigned long personality_from_string(const char *p);
|
|
const char *personality_to_string(unsigned long);
|
|
|
|
uint64_t physical_memory(void);
|
|
|
|
void hexdump(FILE *f, const void *p, size_t s);
|
|
|
|
union file_handle_union {
|
|
struct file_handle handle;
|
|
char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
|
|
};
|
|
#define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ }
|
|
|
|
int update_reboot_param_file(const char *param);
|
|
|
|
int umount_recursive(const char *target, int flags);
|
|
|
|
int bind_remount_recursive(const char *prefix, bool ro);
|
|
|
|
int fflush_and_check(FILE *f);
|
|
|
|
int tempfn_xxxxxx(const char *p, const char *extra, char **ret);
|
|
int tempfn_random(const char *p, const char *extra, char **ret);
|
|
int tempfn_random_child(const char *p, const char *extra, char **ret);
|
|
|
|
int take_password_lock(const char *root);
|
|
|
|
int is_symlink(const char *path);
|
|
int is_dir(const char *path, bool follow);
|
|
int is_device_node(const char *path);
|
|
|
|
typedef enum ExtractFlags {
|
|
EXTRACT_RELAX = 1,
|
|
EXTRACT_CUNESCAPE = 2,
|
|
EXTRACT_CUNESCAPE_RELAX = 4,
|
|
EXTRACT_QUOTES = 8,
|
|
EXTRACT_DONT_COALESCE_SEPARATORS = 16,
|
|
} ExtractFlags;
|
|
|
|
int extract_first_word(const char **p, char **ret, const char *separators, ExtractFlags flags);
|
|
int extract_first_word_and_warn(const char **p, char **ret, const char *separators, ExtractFlags flags, const char *unit, const char *filename, unsigned line, const char *rvalue);
|
|
int extract_many_words(const char **p, const char *separators, ExtractFlags flags, ...) _sentinel_;
|
|
|
|
static inline void free_and_replace(char **s, char *v) {
|
|
free(*s);
|
|
*s = v;
|
|
}
|
|
|
|
int free_and_strdup(char **p, const char *s);
|
|
|
|
#define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1)
|
|
|
|
#define FOREACH_INOTIFY_EVENT(e, buffer, sz) \
|
|
for ((e) = &buffer.ev; \
|
|
(uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \
|
|
(e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len))
|
|
|
|
union inotify_event_buffer {
|
|
struct inotify_event ev;
|
|
uint8_t raw[INOTIFY_EVENT_MAX];
|
|
};
|
|
|
|
#define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW)
|
|
|
|
int ptsname_malloc(int fd, char **ret);
|
|
|
|
int openpt_in_namespace(pid_t pid, int flags);
|
|
|
|
ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags);
|
|
|
|
int fd_setcrtime(int fd, usec_t usec);
|
|
int fd_getcrtime(int fd, usec_t *usec);
|
|
int path_getcrtime(const char *p, usec_t *usec);
|
|
int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags);
|
|
|
|
int same_fd(int a, int b);
|
|
|
|
int chattr_fd(int fd, unsigned value, unsigned mask);
|
|
int chattr_path(const char *p, unsigned value, unsigned mask);
|
|
|
|
int read_attr_fd(int fd, unsigned *ret);
|
|
int read_attr_path(const char *p, unsigned *ret);
|
|
|
|
#define RLIMIT_MAKE_CONST(lim) ((struct rlimit) { lim, lim })
|
|
|
|
ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length);
|
|
|
|
void sigkill_wait(pid_t *pid);
|
|
#define _cleanup_sigkill_wait_ _cleanup_(sigkill_wait)
|
|
|
|
int syslog_parse_priority(const char **p, int *priority, bool with_facility);
|
|
|
|
void cmsg_close_all(struct msghdr *mh);
|
|
|
|
int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath);
|
|
|
|
char *shell_escape(const char *s, const char *bad);
|
|
char *shell_maybe_quote(const char *s);
|
|
|
|
int parse_mode(const char *s, mode_t *ret);
|
|
|
|
int mount_move_root(const char *path);
|
|
|
|
int reset_uid_gid(void);
|
|
|
|
int getxattr_malloc(const char *path, const char *name, char **value, bool allow_symlink);
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int fgetxattr_malloc(int fd, const char *name, char **value);
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