/*-*- 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_; int strcmp_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(1, (n))) static inline void *mfree(void *memory) { free(memory); return NULL; } 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 base32hexchar(int x) _const_; int unbase32hexchar(char c) _const_; char base64char(int x) _const_; int unbase64char(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); 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); 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); int fgetxattr_malloc(int fd, const char *name, char **value);