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Diffstat (limited to 'src/shared/util.h')
| -rw-r--r-- | src/shared/util.h | 903 |
1 files changed, 0 insertions, 903 deletions
diff --git a/src/shared/util.h b/src/shared/util.h deleted file mode 100644 index 467ae234a0..0000000000 --- a/src/shared/util.h +++ /dev/null @@ -1,903 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -#pragma once - -/*** - This file is part of systemd. - - Copyright 2010 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <alloca.h> -#include <fcntl.h> -#include <inttypes.h> -#include <time.h> -#include <stdarg.h> -#include <stdbool.h> -#include <stdlib.h> -#include <stdio.h> -#include <sched.h> -#include <limits.h> -#include <sys/types.h> -#include <sys/socket.h> -#include <sys/stat.h> -#include <dirent.h> -#include <stddef.h> -#include <unistd.h> -#include <locale.h> -#include <mntent.h> -#include <sys/inotify.h> -#include <sys/statfs.h> - -#include "macro.h" -#include "missing.h" -#include "time-util.h" -#include "formats-util.h" - -/* What is interpreted as whitespace? */ -#define WHITESPACE " \t\n\r" -#define NEWLINE "\n\r" -#define QUOTES "\"\'" -#define COMMENTS "#;" -#define GLOB_CHARS "*?[" - -/* What characters are special in the shell? */ -/* must be escaped outside and inside double-quotes */ -#define SHELL_NEED_ESCAPE "\"\\`$" -/* can be escaped or double-quoted */ -#define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;" - -#define FORMAT_BYTES_MAX 8 - -size_t page_size(void) _pure_; -#define PAGE_ALIGN(l) ALIGN_TO((l), page_size()) - -#define streq(a,b) (strcmp((a),(b)) == 0) -#define strneq(a, b, n) (strncmp((a), (b), (n)) == 0) -#define strcaseeq(a,b) (strcasecmp((a),(b)) == 0) -#define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0) - -bool streq_ptr(const char *a, const char *b) _pure_; - -#define new(t, n) ((t*) malloc_multiply(sizeof(t), (n))) - -#define new0(t, n) ((t*) calloc((n), sizeof(t))) - -#define newa(t, n) ((t*) alloca(sizeof(t)*(n))) - -#define newa0(t, n) ((t*) alloca0(sizeof(t)*(n))) - -#define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n))) - -#define malloc0(n) (calloc((n), 1)) - -static inline const char* yes_no(bool b) { - return b ? "yes" : "no"; -} - -static inline const char* true_false(bool b) { - return b ? "true" : "false"; -} - -static inline const char* one_zero(bool b) { - return b ? "1" : "0"; -} - -static inline const char* strempty(const char *s) { - return s ? s : ""; -} - -static inline const char* strnull(const char *s) { - return s ? s : "(null)"; -} - -static inline const char *strna(const char *s) { - return s ? s : "n/a"; -} - -static inline bool isempty(const char *p) { - return !p || !p[0]; -} - -static inline char *startswith(const char *s, const char *prefix) { - size_t l; - - l = strlen(prefix); - if (strncmp(s, prefix, l) == 0) - return (char*) s + l; - - return NULL; -} - -static inline char *startswith_no_case(const char *s, const char *prefix) { - size_t l; - - l = strlen(prefix); - if (strncasecmp(s, prefix, l) == 0) - return (char*) s + l; - - return NULL; -} - -char *endswith(const char *s, const char *postfix) _pure_; -char *endswith_no_case(const char *s, const char *postfix) _pure_; - -char *first_word(const char *s, const char *word) _pure_; - -int close_nointr(int fd); -int safe_close(int fd); -void safe_close_pair(int p[]); - -void close_many(const int fds[], unsigned n_fd); - -int parse_size(const char *t, off_t base, off_t *size); - -int parse_boolean(const char *v) _pure_; -int parse_pid(const char *s, pid_t* ret_pid); -int parse_uid(const char *s, uid_t* ret_uid); -#define parse_gid(s, ret_uid) parse_uid(s, ret_uid) - -int safe_atou(const char *s, unsigned *ret_u); -int safe_atoi(const char *s, int *ret_i); - -int safe_atollu(const char *s, unsigned long long *ret_u); -int safe_atolli(const char *s, long long int *ret_i); - -int safe_atod(const char *s, double *ret_d); - -int safe_atou8(const char *s, uint8_t *ret); - -#if LONG_MAX == INT_MAX -static inline int safe_atolu(const char *s, unsigned long *ret_u) { - assert_cc(sizeof(unsigned long) == sizeof(unsigned)); - return safe_atou(s, (unsigned*) ret_u); -} -static inline int safe_atoli(const char *s, long int *ret_u) { - assert_cc(sizeof(long int) == sizeof(int)); - return safe_atoi(s, (int*) ret_u); -} -#else -static inline int safe_atolu(const char *s, unsigned long *ret_u) { - assert_cc(sizeof(unsigned long) == sizeof(unsigned long long)); - return safe_atollu(s, (unsigned long long*) ret_u); -} -static inline int safe_atoli(const char *s, long int *ret_u) { - assert_cc(sizeof(long int) == sizeof(long long int)); - return safe_atolli(s, (long long int*) ret_u); -} -#endif - -static inline int safe_atou32(const char *s, uint32_t *ret_u) { - assert_cc(sizeof(uint32_t) == sizeof(unsigned)); - return safe_atou(s, (unsigned*) ret_u); -} - -static inline int safe_atoi32(const char *s, int32_t *ret_i) { - assert_cc(sizeof(int32_t) == sizeof(int)); - return safe_atoi(s, (int*) ret_i); -} - -static inline int safe_atou64(const char *s, uint64_t *ret_u) { - assert_cc(sizeof(uint64_t) == sizeof(unsigned long long)); - return safe_atollu(s, (unsigned long long*) ret_u); -} - -static inline int safe_atoi64(const char *s, int64_t *ret_i) { - assert_cc(sizeof(int64_t) == sizeof(long long int)); - return safe_atolli(s, (long long int*) ret_i); -} - -int safe_atou16(const char *s, uint16_t *ret); -int safe_atoi16(const char *s, int16_t *ret); - -const char* split(const char **state, size_t *l, const char *separator, bool quoted); - -#define FOREACH_WORD(word, length, s, state) \ - _FOREACH_WORD(word, length, s, WHITESPACE, false, state) - -#define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \ - _FOREACH_WORD(word, length, s, separator, false, state) - -#define FOREACH_WORD_QUOTED(word, length, s, state) \ - _FOREACH_WORD(word, length, s, WHITESPACE, true, state) - -#define _FOREACH_WORD(word, length, s, separator, quoted, state) \ - for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted))) - -char *strappend(const char *s, const char *suffix); -char *strnappend(const char *s, const char *suffix, size_t length); - -int readlinkat_malloc(int fd, const char *p, char **ret); -int readlink_malloc(const char *p, char **r); -int readlink_value(const char *p, char **ret); -int readlink_and_make_absolute(const char *p, char **r); -int readlink_and_canonicalize(const char *p, char **r); - -char *strstrip(char *s); -char *delete_chars(char *s, const char *bad); -char *truncate_nl(char *s); - -char *file_in_same_dir(const char *path, const char *filename); - -int rmdir_parents(const char *path, const char *stop); - -char hexchar(int x) _const_; -int unhexchar(char c) _const_; -char octchar(int x) _const_; -int unoctchar(char c) _const_; -char decchar(int x) _const_; -int undecchar(char c) _const_; - -char *cescape(const char *s); -size_t cescape_char(char c, char *buf); - -typedef enum UnescapeFlags { - UNESCAPE_RELAX = 1, -} UnescapeFlags; - -int cunescape(const char *s, UnescapeFlags flags, char **ret); -int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret); -int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret); - -char *xescape(const char *s, const char *bad); - -char *ascii_strlower(char *path); - -bool dirent_is_file(const struct dirent *de) _pure_; -bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_; - -bool hidden_file(const char *filename) _pure_; - -bool chars_intersect(const char *a, const char *b) _pure_; - -/* For basic lookup tables with strictly enumerated entries */ -#define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \ - scope const char *name##_to_string(type i) { \ - if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \ - return NULL; \ - return name##_table[i]; \ - } - -ssize_t string_table_lookup(const char * const *table, size_t len, const char *key); - -#define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \ - scope inline type name##_from_string(const char *s) { \ - return (type)string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \ - } - -#define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \ - _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \ - _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \ - struct __useless_struct_to_allow_trailing_semicolon__ - -#define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,) -#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static) -#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static) -#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static) - -/* For string conversions where numbers are also acceptable */ -#define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \ - int name##_to_string_alloc(type i, char **str) { \ - char *s; \ - int r; \ - if (i < 0 || i > max) \ - return -ERANGE; \ - if (i < (type) ELEMENTSOF(name##_table)) { \ - s = strdup(name##_table[i]); \ - if (!s) \ - return log_oom(); \ - } else { \ - r = asprintf(&s, "%i", i); \ - if (r < 0) \ - return log_oom(); \ - } \ - *str = s; \ - return 0; \ - } \ - type name##_from_string(const char *s) { \ - type i; \ - unsigned u = 0; \ - assert(s); \ - for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \ - if (name##_table[i] && \ - streq(name##_table[i], s)) \ - return i; \ - if (safe_atou(s, &u) >= 0 && u <= max) \ - return (type) u; \ - return (type) -1; \ - } \ - struct __useless_struct_to_allow_trailing_semicolon__ - -int fd_nonblock(int fd, bool nonblock); -int fd_cloexec(int fd, bool cloexec); - -int close_all_fds(const int except[], unsigned n_except); - -bool fstype_is_network(const char *fstype); - -int flush_fd(int fd); - -int fopen_temporary(const char *path, FILE **_f, char **_temp_path); - -ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll); -int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll); -int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll); - -bool is_device_path(const char *path); - -int dir_is_empty(const char *path); -char* dirname_malloc(const char *path); - -char* lookup_uid(uid_t uid); -char* getlogname_malloc(void); -char* getusername_malloc(void); - -int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid); -int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid); - -bool is_temporary_fs(const struct statfs *s) _pure_; -int fd_is_temporary_fs(int fd); - -int pipe_eof(int fd); - -cpu_set_t* cpu_set_malloc(unsigned *ncpus); - -#define xsprintf(buf, fmt, ...) assert_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf)) - -int files_same(const char *filea, const char *fileb); - -int running_in_chroot(void); - -char *ellipsize(const char *s, size_t length, unsigned percent); - /* bytes columns */ -char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent); - -int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode); -int touch(const char *path); - -noreturn void freeze(void); - -bool null_or_empty(struct stat *st) _pure_; -int null_or_empty_path(const char *fn); -int null_or_empty_fd(int fd); - -DIR *xopendirat(int dirfd, const char *name, int flags); - -char *fstab_node_to_udev_node(const char *p); - -void execute_directories(const char* const* directories, usec_t timeout, char *argv[]); - -bool nulstr_contains(const char*nulstr, const char *needle); - -bool plymouth_running(void); - -bool machine_name_is_valid(const char *s) _pure_; - -char* strshorten(char *s, size_t l); - -int symlink_idempotent(const char *from, const char *to); - -int symlink_atomic(const char *from, const char *to); -int mknod_atomic(const char *path, mode_t mode, dev_t dev); -int mkfifo_atomic(const char *path, mode_t mode); - -int fchmod_umask(int fd, mode_t mode); - -bool display_is_local(const char *display) _pure_; -int socket_from_display(const char *display, char **path); - -int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell); -int get_group_creds(const char **groupname, gid_t *gid); - -int in_gid(gid_t gid); -int in_group(const char *name); - -char* uid_to_name(uid_t uid); -char* gid_to_name(gid_t gid); - -int glob_exists(const char *path); -int glob_extend(char ***strv, const char *path); - -int dirent_ensure_type(DIR *d, struct dirent *de); - -int get_files_in_directory(const char *path, char ***list); - -char *strjoin(const char *x, ...) _sentinel_; - -bool is_main_thread(void); - -static inline bool _pure_ in_charset(const char *s, const char* charset) { - assert(s); - assert(charset); - return s[strspn(s, charset)] == '\0'; -} - -int block_get_whole_disk(dev_t d, dev_t *ret); - -#define NULSTR_FOREACH(i, l) \ - for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1) - -#define NULSTR_FOREACH_PAIR(i, j, l) \ - for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i)) - -int ioprio_class_to_string_alloc(int i, char **s); -int ioprio_class_from_string(const char *s); - -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); -} - -DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose); -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) -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); -void *unhexmem(const char *p, size_t l); - -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 *root_fd); -int namespace_enter(int pidns_fd, int mntns_fd, int netns_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, char **ret); -int tempfn_random(const char *p, char **ret); -int tempfn_random_child(const char *p, 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 UnquoteFlags { - UNQUOTE_RELAX = 1, - UNQUOTE_CUNESCAPE = 2, -} UnquoteFlags; - -int unquote_first_word(const char **p, char **ret, UnquoteFlags flags); -int unquote_many_words(const char **p, UnquoteFlags flags, ...) _sentinel_; - -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_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); |