1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2010 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
34 #include <sys/types.h>
35 #include <sys/socket.h>
42 #include <sys/inotify.h>
43 #include <sys/statfs.h>
47 #include "time-util.h"
48 #include "formats-util.h"
50 /* What is interpreted as whitespace? */
51 #define WHITESPACE " \t\n\r"
52 #define NEWLINE "\n\r"
55 #define GLOB_CHARS "*?["
57 /* What characters are special in the shell? */
58 /* must be escaped outside and inside double-quotes */
59 #define SHELL_NEED_ESCAPE "\"\\`$"
60 /* can be escaped or double-quoted */
61 #define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;"
63 #define FORMAT_BYTES_MAX 8
65 size_t page_size(void) _pure_;
66 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
68 #define streq(a,b) (strcmp((a),(b)) == 0)
69 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
70 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
71 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
73 bool streq_ptr(const char *a, const char *b) _pure_;
75 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
77 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
79 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
81 #define newa0(t, n) ((t*) alloca0(sizeof(t)*(n)))
83 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
85 #define malloc0(n) (calloc((n), 1))
87 static inline const char* yes_no(bool b) {
88 return b ? "yes" : "no";
91 static inline const char* true_false(bool b) {
92 return b ? "true" : "false";
95 static inline const char* one_zero(bool b) {
99 static inline const char* strempty(const char *s) {
103 static inline const char* strnull(const char *s) {
104 return s ? s : "(null)";
107 static inline const char *strna(const char *s) {
108 return s ? s : "n/a";
111 static inline bool isempty(const char *p) {
115 static inline char *startswith(const char *s, const char *prefix) {
119 if (strncmp(s, prefix, l) == 0)
120 return (char*) s + l;
125 static inline char *startswith_no_case(const char *s, const char *prefix) {
129 if (strncasecmp(s, prefix, l) == 0)
130 return (char*) s + l;
135 char *endswith(const char *s, const char *postfix) _pure_;
136 char *endswith_no_case(const char *s, const char *postfix) _pure_;
138 char *first_word(const char *s, const char *word) _pure_;
140 int close_nointr(int fd);
141 int safe_close(int fd);
142 void safe_close_pair(int p[]);
144 void close_many(const int fds[], unsigned n_fd);
146 int parse_size(const char *t, off_t base, off_t *size);
148 int parse_boolean(const char *v) _pure_;
149 int parse_pid(const char *s, pid_t* ret_pid);
150 int parse_uid(const char *s, uid_t* ret_uid);
151 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
153 int safe_atou(const char *s, unsigned *ret_u);
154 int safe_atoi(const char *s, int *ret_i);
156 int safe_atollu(const char *s, unsigned long long *ret_u);
157 int safe_atolli(const char *s, long long int *ret_i);
159 int safe_atod(const char *s, double *ret_d);
161 int safe_atou8(const char *s, uint8_t *ret);
163 #if LONG_MAX == INT_MAX
164 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
165 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
166 return safe_atou(s, (unsigned*) ret_u);
168 static inline int safe_atoli(const char *s, long int *ret_u) {
169 assert_cc(sizeof(long int) == sizeof(int));
170 return safe_atoi(s, (int*) ret_u);
173 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
174 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
175 return safe_atollu(s, (unsigned long long*) ret_u);
177 static inline int safe_atoli(const char *s, long int *ret_u) {
178 assert_cc(sizeof(long int) == sizeof(long long int));
179 return safe_atolli(s, (long long int*) ret_u);
183 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
184 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
185 return safe_atou(s, (unsigned*) ret_u);
188 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
189 assert_cc(sizeof(int32_t) == sizeof(int));
190 return safe_atoi(s, (int*) ret_i);
193 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
194 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
195 return safe_atollu(s, (unsigned long long*) ret_u);
198 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
199 assert_cc(sizeof(int64_t) == sizeof(long long int));
200 return safe_atolli(s, (long long int*) ret_i);
203 int safe_atou16(const char *s, uint16_t *ret);
204 int safe_atoi16(const char *s, int16_t *ret);
206 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
208 #define FOREACH_WORD(word, length, s, state) \
209 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
211 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
212 _FOREACH_WORD(word, length, s, separator, false, state)
214 #define FOREACH_WORD_QUOTED(word, length, s, state) \
215 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
217 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
218 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
220 char *strappend(const char *s, const char *suffix);
221 char *strnappend(const char *s, const char *suffix, size_t length);
223 int readlinkat_malloc(int fd, const char *p, char **ret);
224 int readlink_malloc(const char *p, char **r);
225 // UNNEEDED int readlink_value(const char *p, char **ret);
226 int readlink_and_make_absolute(const char *p, char **r);
227 // UNNEEDED int readlink_and_canonicalize(const char *p, char **r);
229 char *strstrip(char *s);
230 // UNNEEDED char *delete_chars(char *s, const char *bad);
231 char *truncate_nl(char *s);
233 char *file_in_same_dir(const char *path, const char *filename);
235 // UNNEEDED int rmdir_parents(const char *path, const char *stop);
237 char hexchar(int x) _const_;
238 int unhexchar(char c) _const_;
239 char octchar(int x) _const_;
240 int unoctchar(char c) _const_;
241 char decchar(int x) _const_;
242 int undecchar(char c) _const_;
244 char *cescape(const char *s);
245 size_t cescape_char(char c, char *buf);
247 typedef enum UnescapeFlags {
251 int cunescape(const char *s, UnescapeFlags flags, char **ret);
252 int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret);
253 int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret);
255 char *xescape(const char *s, const char *bad);
257 // UNNEEDED char *ascii_strlower(char *path);
259 bool dirent_is_file(const struct dirent *de) _pure_;
260 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
262 bool hidden_file(const char *filename) _pure_;
264 bool chars_intersect(const char *a, const char *b) _pure_;
266 /* For basic lookup tables with strictly enumerated entries */
267 #define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
268 scope const char *name##_to_string(type i) { \
269 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
271 return name##_table[i]; \
274 ssize_t string_table_lookup(const char * const *table, size_t len, const char *key);
276 #define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
277 scope inline type name##_from_string(const char *s) { \
278 return (type)string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
281 #define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
282 _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
283 _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
284 struct __useless_struct_to_allow_trailing_semicolon__
286 #define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,)
287 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static)
288 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static)
289 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static)
291 /* For string conversions where numbers are also acceptable */
292 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
293 int name##_to_string_alloc(type i, char **str) { \
296 if (i < 0 || i > max) \
298 if (i < (type) ELEMENTSOF(name##_table)) { \
299 s = strdup(name##_table[i]); \
303 r = asprintf(&s, "%i", i); \
310 type name##_from_string(const char *s) { \
314 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
315 if (name##_table[i] && \
316 streq(name##_table[i], s)) \
318 if (safe_atou(s, &u) >= 0 && u <= max) \
322 struct __useless_struct_to_allow_trailing_semicolon__
324 int fd_nonblock(int fd, bool nonblock);
325 int fd_cloexec(int fd, bool cloexec);
327 int close_all_fds(const int except[], unsigned n_except);
329 // UNNEEDED bool fstype_is_network(const char *fstype);
331 int flush_fd(int fd);
333 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
335 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
336 int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll);
337 int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
339 bool is_device_path(const char *path);
341 // UNNEEDED int dir_is_empty(const char *path);
342 // UNNEEDED char* dirname_malloc(const char *path);
344 char* lookup_uid(uid_t uid);
345 // UNNEEDED char* getlogname_malloc(void);
346 // UNNEEDED char* getusername_malloc(void);
348 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
349 // UNNEEDED int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
351 bool is_temporary_fs(const struct statfs *s) _pure_;
352 int fd_is_temporary_fs(int fd);
354 int pipe_eof(int fd);
356 // UNNEEDED cpu_set_t* cpu_set_malloc(unsigned *ncpus);
358 #define xsprintf(buf, fmt, ...) assert_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf))
360 int files_same(const char *filea, const char *fileb);
362 // UNNEEDED int running_in_chroot(void);
364 char *ellipsize(const char *s, size_t length, unsigned percent);
366 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
368 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
369 int touch(const char *path);
371 noreturn void freeze(void);
373 bool null_or_empty(struct stat *st) _pure_;
374 int null_or_empty_path(const char *fn);
375 // UNNEEDED int null_or_empty_fd(int fd);
377 DIR *xopendirat(int dirfd, const char *name, int flags);
379 // UNNEEDED char *fstab_node_to_udev_node(const char *p);
381 // UNNEEDED void execute_directories(const char* const* directories, usec_t timeout, char *argv[]);
383 bool nulstr_contains(const char*nulstr, const char *needle);
385 // UNNEEDED bool plymouth_running(void);
387 bool machine_name_is_valid(const char *s) _pure_;
389 char* strshorten(char *s, size_t l);
391 // UNNEEDED int symlink_idempotent(const char *from, const char *to);
393 // UNNEEDED int symlink_atomic(const char *from, const char *to);
394 // UNNEEDED int mknod_atomic(const char *path, mode_t mode, dev_t dev);
395 // UNNEEDED int mkfifo_atomic(const char *path, mode_t mode);
397 int fchmod_umask(int fd, mode_t mode);
399 bool display_is_local(const char *display) _pure_;
400 int socket_from_display(const char *display, char **path);
402 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
403 int get_group_creds(const char **groupname, gid_t *gid);
405 int in_gid(gid_t gid);
406 // UNNEEDED int in_group(const char *name);
408 char* uid_to_name(uid_t uid);
409 char* gid_to_name(gid_t gid);
411 // UNNEEDED int glob_exists(const char *path);
412 // UNNEEDED int glob_extend(char ***strv, const char *path);
414 int dirent_ensure_type(DIR *d, struct dirent *de);
416 int get_files_in_directory(const char *path, char ***list);
418 char *strjoin(const char *x, ...) _sentinel_;
420 bool is_main_thread(void);
422 static inline bool _pure_ in_charset(const char *s, const char* charset) {
425 return s[strspn(s, charset)] == '\0';
428 // UNNEEDED int block_get_whole_disk(dev_t d, dev_t *ret);
430 #define NULSTR_FOREACH(i, l) \
431 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
433 #define NULSTR_FOREACH_PAIR(i, j, l) \
434 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
436 int ioprio_class_to_string_alloc(int i, char **s);
437 int ioprio_class_from_string(const char *s);
439 const char *sigchld_code_to_string(int i) _const_;
440 int sigchld_code_from_string(const char *s) _pure_;
442 int log_facility_unshifted_to_string_alloc(int i, char **s);
443 int log_facility_unshifted_from_string(const char *s);
445 int log_level_to_string_alloc(int i, char **s);
446 int log_level_from_string(const char *s);
448 int sched_policy_to_string_alloc(int i, char **s);
449 int sched_policy_from_string(const char *s);
451 const char *rlimit_to_string(int i) _const_;
452 int rlimit_from_string(const char *s) _pure_;
454 int ip_tos_to_string_alloc(int i, char **s);
455 int ip_tos_from_string(const char *s);
457 extern int saved_argc;
458 extern char **saved_argv;
460 bool kexec_loaded(void);
462 // UNNEEDED int prot_from_flags(int flags) _const_;
464 // UNNEEDED char *format_bytes(char *buf, size_t l, off_t t);
466 int fd_wait_for_event(int fd, int event, usec_t timeout);
468 void* memdup(const void *p, size_t l) _alloc_(2);
470 int fd_inc_sndbuf(int fd, size_t n);
471 int fd_inc_rcvbuf(int fd, size_t n);
473 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
475 // UNNEEDED int setrlimit_closest(int resource, const struct rlimit *rlim);
477 bool http_url_is_valid(const char *url) _pure_;
478 bool documentation_url_is_valid(const char *url) _pure_;
480 // UNNEEDED bool http_etag_is_valid(const char *etag);
482 bool in_initrd(void);
484 int get_home_dir(char **ret);
485 // UNNEEDED int get_shell(char **_ret);
487 static inline void freep(void *p) {
491 static inline void closep(int *fd) {
495 static inline void umaskp(mode_t *u) {
499 static inline void close_pairp(int (*p)[2]) {
503 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
504 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
505 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
506 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
508 #define _cleanup_free_ _cleanup_(freep)
509 #define _cleanup_close_ _cleanup_(closep)
510 #define _cleanup_umask_ _cleanup_(umaskp)
511 #define _cleanup_globfree_ _cleanup_(globfree)
512 #define _cleanup_fclose_ _cleanup_(fclosep)
513 #define _cleanup_pclose_ _cleanup_(pclosep)
514 #define _cleanup_closedir_ _cleanup_(closedirp)
515 #define _cleanup_endmntent_ _cleanup_(endmntentp)
516 #define _cleanup_close_pair_ _cleanup_(close_pairp)
518 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
519 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
522 return malloc(a * b);
525 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
526 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
529 return realloc(p, a * b);
532 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
533 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
536 return memdup(p, a * b);
539 bool filename_is_valid(const char *p) _pure_;
540 bool path_is_safe(const char *p) _pure_;
541 bool string_is_safe(const char *p) _pure_;
542 bool string_has_cc(const char *p, const char *ok) _pure_;
545 * Check if a string contains any glob patterns.
547 _pure_ static inline bool string_is_glob(const char *p) {
548 return !!strpbrk(p, GLOB_CHARS);
551 // UNNEEDED void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
552 // UNNEEDED int (*compar) (const void *, const void *, void *),
553 // UNNEEDED void *arg);
555 #define _(String) gettext (String)
556 // UNNEEDED void init_gettext(void);
557 bool is_locale_utf8(void);
559 typedef enum DrawSpecialChar {
564 DRAW_TRIANGULAR_BULLET,
568 _DRAW_SPECIAL_CHAR_MAX
571 const char *draw_special_char(DrawSpecialChar ch);
573 // UNNEEDED char *strreplace(const char *text, const char *old_string, const char *new_string);
575 // UNNEEDED char *strip_tab_ansi(char **p, size_t *l);
577 // UNNEEDED int on_ac_power(void);
579 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
580 // UNNEEDED int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
582 #define FOREACH_LINE(line, f, on_error) \
584 if (!fgets(line, sizeof(line), f)) { \
591 #define FOREACH_DIRENT(de, d, on_error) \
592 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
598 } else if (hidden_file((de)->d_name)) \
602 #define FOREACH_DIRENT_ALL(de, d, on_error) \
603 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
611 static inline void *mempset(void *s, int c, size_t n) {
613 return (uint8_t*)s + n;
616 char *hexmem(const void *p, size_t l);
617 void *unhexmem(const char *p, size_t l);
619 char *strextend(char **x, ...) _sentinel_;
620 char *strrep(const char *s, unsigned n);
622 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
623 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
624 #define GREEDY_REALLOC(array, allocated, need) \
625 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
627 #define GREEDY_REALLOC0(array, allocated, need) \
628 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
630 static inline void _reset_errno_(int *saved_errno) {
631 errno = *saved_errno;
634 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
636 static inline int negative_errno(void) {
637 /* This helper should be used to shut up gcc if you know 'errno' is
638 * negative. Instead of "return -errno;", use "return negative_errno();"
639 * It will suppress bogus gcc warnings in case it assumes 'errno' might
640 * be 0 and thus the caller's error-handling might not be triggered. */
641 assert_return(errno > 0, -EINVAL);
645 struct _umask_struct_ {
650 static inline void _reset_umask_(struct _umask_struct_ *s) {
654 #define RUN_WITH_UMASK(mask) \
655 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
656 !_saved_umask_.quit ; \
657 _saved_umask_.quit = true)
659 static inline unsigned u64log2(uint64_t n) {
660 #if __SIZEOF_LONG_LONG__ == 8
661 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
667 static inline unsigned u32ctz(uint32_t n) {
668 #if __SIZEOF_INT__ == 4
669 return __builtin_ctz(n);
675 static inline unsigned log2i(int x) {
678 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
681 static inline unsigned log2u(unsigned x) {
684 return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
687 static inline unsigned log2u_round_up(unsigned x) {
693 return log2u(x - 1) + 1;
696 static inline bool logind_running(void) {
697 return access("/run/systemd/seats/", F_OK) >= 0;
700 #define DECIMAL_STR_WIDTH(x) \
702 typeof(x) _x_ = (x); \
709 int unlink_noerrno(const char *path);
715 _new_ = alloca(_len_); \
716 (void *) memset(_new_, 0, _len_); \
719 /* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */
720 #define alloca_align(size, align) \
723 size_t _mask_ = (align) - 1; \
724 _ptr_ = alloca((size) + _mask_); \
725 (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \
728 #define alloca0_align(size, align) \
731 size_t _size_ = (size); \
732 _new_ = alloca_align(_size_, (align)); \
733 (void*)memset(_new_, 0, _size_); \
736 #define strjoina(a, ...) \
738 const char *_appendees_[] = { a, __VA_ARGS__ }; \
742 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
743 _len_ += strlen(_appendees_[_i_]); \
744 _p_ = _d_ = alloca(_len_ + 1); \
745 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
746 _p_ = stpcpy(_p_, _appendees_[_i_]); \
751 bool id128_is_valid(const char *s) _pure_;
753 // UNNEEDED int split_pair(const char *s, const char *sep, char **l, char **r);
755 // UNNEEDED int shall_restore_state(void);
758 * Normal qsort requires base to be nonnull. Here were require
759 * that only if nmemb > 0.
761 static inline void qsort_safe(void *base, size_t nmemb, size_t size, comparison_fn_t compar) {
766 qsort(base, nmemb, size, compar);
769 /* Normal memmem() requires haystack to be nonnull, which is annoying for zero-length buffers */
770 static inline void *memmem_safe(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen) {
773 return (void*) haystack;
775 if (haystacklen < needlelen)
781 return memmem(haystack, haystacklen, needle, needlelen);
784 int proc_cmdline(char **ret);
785 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
786 int get_proc_cmdline_key(const char *parameter, char **value);
788 // UNNEEDED int container_get_leader(const char *machine, pid_t *pid);
790 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd);
791 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd);
793 int getpeercred(int fd, struct ucred *ucred);
794 int getpeersec(int fd, char **ret);
796 int writev_safe(int fd, const struct iovec *w, int j);
798 int mkostemp_safe(char *pattern, int flags);
799 // UNNEEDED int open_tmpfile(const char *path, int flags);
801 int fd_warn_permissions(const char *path, int fd);
803 #ifndef PERSONALITY_INVALID
804 /* personality(7) documents that 0xffffffffUL is used for querying the
805 * current personality, hence let's use that here as error
807 #define PERSONALITY_INVALID 0xffffffffLU
810 // UNNEEDED unsigned long personality_from_string(const char *p);
811 // UNNEEDED const char *personality_to_string(unsigned long);
813 uint64_t physical_memory(void);
815 // UNNEEDED void hexdump(FILE *f, const void *p, size_t s);
817 union file_handle_union {
818 struct file_handle handle;
819 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
821 #define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ }
823 // UNNEEDED int update_reboot_param_file(const char *param);
825 // UNNEEDED int umount_recursive(const char *target, int flags);
827 // UNNEEDED int bind_remount_recursive(const char *prefix, bool ro);
829 int fflush_and_check(FILE *f);
831 int tempfn_xxxxxx(const char *p, const char *extra, char **ret);
832 int tempfn_random(const char *p, const char *extra, char **ret);
833 // UNNEEDED int tempfn_random_child(const char *p, const char *extra, char **ret);
835 // UNNEEDED int take_password_lock(const char *root);
837 // UNNEEDED int is_symlink(const char *path);
838 int is_dir(const char *path, bool follow);
839 // UNNEEDED int is_device_node(const char *path);
841 typedef enum UnquoteFlags {
843 UNQUOTE_CUNESCAPE = 2,
844 UNQUOTE_CUNESCAPE_RELAX = 4,
847 int unquote_first_word(const char **p, char **ret, UnquoteFlags flags);
848 // UNNEEDED int unquote_first_word_and_warn(const char **p, char **ret, UnquoteFlags flags, const char *unit, const char *filename, unsigned line, const char *rvalue);
849 // UNNEEDED int unquote_many_words(const char **p, UnquoteFlags flags, ...) _sentinel_;
851 int free_and_strdup(char **p, const char *s);
853 #define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1)
855 #define FOREACH_INOTIFY_EVENT(e, buffer, sz) \
856 for ((e) = &buffer.ev; \
857 (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \
858 (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len))
860 union inotify_event_buffer {
861 struct inotify_event ev;
862 uint8_t raw[INOTIFY_EVENT_MAX];
865 #define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW)
867 // UNNEEDED int ptsname_malloc(int fd, char **ret);
869 // UNNEEDED int openpt_in_namespace(pid_t pid, int flags);
871 ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags);
873 // UNNEEDED int fd_setcrtime(int fd, usec_t usec);
874 int fd_getcrtime(int fd, usec_t *usec);
875 // UNNEEDED int path_getcrtime(const char *p, usec_t *usec);
876 // UNNEEDED int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags);
878 // UNNEEDED int same_fd(int a, int b);
880 int chattr_fd(int fd, unsigned value, unsigned mask);
881 // UNNEEDED int chattr_path(const char *p, unsigned value, unsigned mask);
883 int read_attr_fd(int fd, unsigned *ret);
884 // UNNEEDED int read_attr_path(const char *p, unsigned *ret);
886 #define RLIMIT_MAKE_CONST(lim) ((struct rlimit) { lim, lim })
888 // UNNEEDED ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length);
890 void sigkill_wait(pid_t *pid);
891 #define _cleanup_sigkill_wait_ _cleanup_(sigkill_wait)
893 // UNNEEDED int syslog_parse_priority(const char **p, int *priority, bool with_facility);
895 // UNNEEDED void cmsg_close_all(struct msghdr *mh);
897 // UNNEEDED int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath);
899 char *shell_maybe_quote(const char *s);
901 int parse_mode(const char *s, mode_t *ret);
903 // UNNEEDED int mount_move_root(const char *path);
905 int reset_uid_gid(void);