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>
44 #include <sys/sysmacros.h>
48 #include "time-util.h"
49 #include "formats-util.h"
51 /* What is interpreted as whitespace? */
52 #define WHITESPACE " \t\n\r"
53 #define NEWLINE "\n\r"
56 #define GLOB_CHARS "*?["
58 /* What characters are special in the shell? */
59 /* must be escaped outside and inside double-quotes */
60 #define SHELL_NEED_ESCAPE "\"\\`$"
61 /* can be escaped or double-quoted */
62 #define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;"
64 #define FORMAT_BYTES_MAX 8
66 size_t page_size(void) _pure_;
67 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
69 #define streq(a,b) (strcmp((a),(b)) == 0)
70 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
71 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
72 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
74 bool streq_ptr(const char *a, const char *b) _pure_;
75 int strcmp_ptr(const char *a, const char *b) _pure_;
77 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
79 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
81 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
83 #define newa0(t, n) ((t*) alloca0(sizeof(t)*(n)))
85 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
87 #define malloc0(n) (calloc(1, (n)))
89 static inline void *mfree(void *memory) {
94 static inline const char* yes_no(bool b) {
95 return b ? "yes" : "no";
98 static inline const char* true_false(bool b) {
99 return b ? "true" : "false";
102 static inline const char* one_zero(bool b) {
103 return b ? "1" : "0";
106 static inline const char* strempty(const char *s) {
110 static inline const char* strnull(const char *s) {
111 return s ? s : "(null)";
114 static inline const char *strna(const char *s) {
115 return s ? s : "n/a";
118 static inline bool isempty(const char *p) {
122 static inline char *startswith(const char *s, const char *prefix) {
126 if (strncmp(s, prefix, l) == 0)
127 return (char*) s + l;
132 static inline char *startswith_no_case(const char *s, const char *prefix) {
136 if (strncasecmp(s, prefix, l) == 0)
137 return (char*) s + l;
142 char *endswith(const char *s, const char *postfix) _pure_;
143 char *endswith_no_case(const char *s, const char *postfix) _pure_;
145 char *first_word(const char *s, const char *word) _pure_;
147 int close_nointr(int fd);
148 int safe_close(int fd);
149 void safe_close_pair(int p[]);
151 void close_many(const int fds[], unsigned n_fd);
153 int parse_size(const char *t, off_t base, off_t *size);
155 int parse_boolean(const char *v) _pure_;
156 int parse_pid(const char *s, pid_t* ret_pid);
157 int parse_uid(const char *s, uid_t* ret_uid);
158 #define parse_gid(s, ret_gid) parse_uid(s, ret_gid)
160 bool uid_is_valid(uid_t uid);
161 #define gid_is_valid(gid) uid_is_valid(gid)
163 int safe_atou(const char *s, unsigned *ret_u);
164 int safe_atoi(const char *s, int *ret_i);
166 int safe_atollu(const char *s, unsigned long long *ret_u);
167 int safe_atolli(const char *s, long long int *ret_i);
169 int safe_atod(const char *s, double *ret_d);
171 int safe_atou8(const char *s, uint8_t *ret);
173 #if LONG_MAX == INT_MAX
174 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
175 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
176 return safe_atou(s, (unsigned*) ret_u);
178 static inline int safe_atoli(const char *s, long int *ret_u) {
179 assert_cc(sizeof(long int) == sizeof(int));
180 return safe_atoi(s, (int*) ret_u);
183 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
184 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
185 return safe_atollu(s, (unsigned long long*) ret_u);
187 static inline int safe_atoli(const char *s, long int *ret_u) {
188 assert_cc(sizeof(long int) == sizeof(long long int));
189 return safe_atolli(s, (long long int*) ret_u);
193 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
194 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
195 return safe_atou(s, (unsigned*) ret_u);
198 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
199 assert_cc(sizeof(int32_t) == sizeof(int));
200 return safe_atoi(s, (int*) ret_i);
203 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
204 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
205 return safe_atollu(s, (unsigned long long*) ret_u);
208 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
209 assert_cc(sizeof(int64_t) == sizeof(long long int));
210 return safe_atolli(s, (long long int*) ret_i);
213 int safe_atou16(const char *s, uint16_t *ret);
214 int safe_atoi16(const char *s, int16_t *ret);
216 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
218 #define FOREACH_WORD(word, length, s, state) \
219 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
221 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
222 _FOREACH_WORD(word, length, s, separator, false, state)
224 #define FOREACH_WORD_QUOTED(word, length, s, state) \
225 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
227 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
228 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
230 char *strappend(const char *s, const char *suffix);
231 char *strnappend(const char *s, const char *suffix, size_t length);
233 int readlinkat_malloc(int fd, const char *p, char **ret);
234 int readlink_malloc(const char *p, char **r);
235 // UNNEEDED int readlink_value(const char *p, char **ret);
236 int readlink_and_make_absolute(const char *p, char **r);
237 // UNNEEDED int readlink_and_canonicalize(const char *p, char **r);
239 char *strstrip(char *s);
240 // UNNEEDED char *delete_chars(char *s, const char *bad);
241 char *truncate_nl(char *s);
243 char *file_in_same_dir(const char *path, const char *filename);
245 // UNNEEDED int rmdir_parents(const char *path, const char *stop);
247 char hexchar(int x) _const_;
248 int unhexchar(char c) _const_;
249 char octchar(int x) _const_;
250 int unoctchar(char c) _const_;
251 char decchar(int x) _const_;
252 int undecchar(char c) _const_;
253 char base32hexchar(int x) _const_;
254 int unbase32hexchar(char c) _const_;
255 char base64char(int x) _const_;
256 int unbase64char(char c) _const_;
258 char *cescape(const char *s);
259 size_t cescape_char(char c, char *buf);
261 typedef enum UnescapeFlags {
265 int cunescape(const char *s, UnescapeFlags flags, char **ret);
266 int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret);
267 int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret);
269 char *xescape(const char *s, const char *bad);
271 // UNNEEDED char *ascii_strlower(char *path);
273 bool dirent_is_file(const struct dirent *de) _pure_;
274 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
276 bool hidden_file(const char *filename) _pure_;
278 bool chars_intersect(const char *a, const char *b) _pure_;
280 /* For basic lookup tables with strictly enumerated entries */
281 #define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
282 scope const char *name##_to_string(type i) { \
283 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
285 return name##_table[i]; \
288 ssize_t string_table_lookup(const char * const *table, size_t len, const char *key);
290 #define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
291 scope type name##_from_string(const char *s) { \
292 return (type) string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
295 #define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
296 _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
297 _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
298 struct __useless_struct_to_allow_trailing_semicolon__
300 #define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,)
301 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static)
302 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static)
303 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static)
305 /* For string conversions where numbers are also acceptable */
306 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
307 int name##_to_string_alloc(type i, char **str) { \
309 if (i < 0 || i > max) \
311 if (i < (type) ELEMENTSOF(name##_table)) { \
312 s = strdup(name##_table[i]); \
316 if (asprintf(&s, "%i", i) < 0) \
322 type name##_from_string(const char *s) { \
327 for (i = 0; i < (type) ELEMENTSOF(name##_table); i++) \
328 if (streq_ptr(name##_table[i], s)) \
330 if (safe_atou(s, &u) >= 0 && u <= max) \
334 struct __useless_struct_to_allow_trailing_semicolon__
336 int fd_nonblock(int fd, bool nonblock);
337 int fd_cloexec(int fd, bool cloexec);
339 int close_all_fds(const int except[], unsigned n_except);
341 // UNNEEDED bool fstype_is_network(const char *fstype);
343 int flush_fd(int fd);
345 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
347 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
348 int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll);
349 int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
351 bool is_device_path(const char *path);
353 // UNNEEDED int dir_is_empty(const char *path);
354 // UNNEEDED char* dirname_malloc(const char *path);
356 char* lookup_uid(uid_t uid);
357 // UNNEEDED char* getlogname_malloc(void);
358 // UNNEEDED char* getusername_malloc(void);
360 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
361 // UNNEEDED int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
363 bool is_temporary_fs(const struct statfs *s) _pure_;
364 int fd_is_temporary_fs(int fd);
366 int pipe_eof(int fd);
368 DEFINE_TRIVIAL_CLEANUP_FUNC(cpu_set_t*, CPU_FREE);
369 #define _cleanup_cpu_free_ _cleanup_(CPU_FREEp)
371 // UNNEEDED cpu_set_t* cpu_set_malloc(unsigned *ncpus);
373 #define xsprintf(buf, fmt, ...) assert_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf))
375 int files_same(const char *filea, const char *fileb);
377 int running_in_chroot(void);
379 char *ellipsize(const char *s, size_t length, unsigned percent);
381 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
383 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
384 int touch(const char *path);
386 noreturn void freeze(void);
388 bool null_or_empty(struct stat *st) _pure_;
389 int null_or_empty_path(const char *fn);
390 // UNNEEDED int null_or_empty_fd(int fd);
392 DIR *xopendirat(int dirfd, const char *name, int flags);
394 // UNNEEDED char *fstab_node_to_udev_node(const char *p);
396 void execute_directories(const char* const* directories, usec_t timeout, char *argv[]);
398 bool nulstr_contains(const char*nulstr, const char *needle);
400 // UNNEEDED bool plymouth_running(void);
402 char* strshorten(char *s, size_t l);
404 // UNNEEDED int symlink_idempotent(const char *from, const char *to);
406 // UNNEEDED int symlink_atomic(const char *from, const char *to);
407 // UNNEEDED int mknod_atomic(const char *path, mode_t mode, dev_t dev);
408 // UNNEEDED int mkfifo_atomic(const char *path, mode_t mode);
410 int fchmod_umask(int fd, mode_t mode);
412 bool display_is_local(const char *display) _pure_;
413 int socket_from_display(const char *display, char **path);
415 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
416 int get_group_creds(const char **groupname, gid_t *gid);
418 int in_gid(gid_t gid);
419 // UNNEEDED int in_group(const char *name);
421 char* uid_to_name(uid_t uid);
422 char* gid_to_name(gid_t gid);
424 // UNNEEDED int glob_exists(const char *path);
425 // UNNEEDED int glob_extend(char ***strv, const char *path);
427 int dirent_ensure_type(DIR *d, struct dirent *de);
429 int get_files_in_directory(const char *path, char ***list);
431 char *strjoin(const char *x, ...) _sentinel_;
433 bool is_main_thread(void);
435 static inline bool _pure_ in_charset(const char *s, const char* charset) {
438 return s[strspn(s, charset)] == '\0';
441 // UNNEEDED int block_get_whole_disk(dev_t d, dev_t *ret);
443 #define NULSTR_FOREACH(i, l) \
444 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
446 #define NULSTR_FOREACH_PAIR(i, j, l) \
447 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
449 int ioprio_class_to_string_alloc(int i, char **s);
450 int ioprio_class_from_string(const char *s);
452 const char *sigchld_code_to_string(int i) _const_;
453 int sigchld_code_from_string(const char *s) _pure_;
455 int log_facility_unshifted_to_string_alloc(int i, char **s);
456 int log_facility_unshifted_from_string(const char *s);
458 int log_level_to_string_alloc(int i, char **s);
459 int log_level_from_string(const char *s);
461 int sched_policy_to_string_alloc(int i, char **s);
462 int sched_policy_from_string(const char *s);
464 const char *rlimit_to_string(int i) _const_;
465 int rlimit_from_string(const char *s) _pure_;
467 int ip_tos_to_string_alloc(int i, char **s);
468 int ip_tos_from_string(const char *s);
470 extern int saved_argc;
471 extern char **saved_argv;
473 bool kexec_loaded(void);
475 // UNNEEDED int prot_from_flags(int flags) _const_;
477 // UNNEEDED char *format_bytes(char *buf, size_t l, off_t t);
479 int fd_wait_for_event(int fd, int event, usec_t timeout);
481 void* memdup(const void *p, size_t l) _alloc_(2);
483 int fd_inc_sndbuf(int fd, size_t n);
484 int fd_inc_rcvbuf(int fd, size_t n);
486 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
488 // UNNEEDED int setrlimit_closest(int resource, const struct rlimit *rlim);
490 bool http_url_is_valid(const char *url) _pure_;
491 bool documentation_url_is_valid(const char *url) _pure_;
493 // UNNEEDED bool http_etag_is_valid(const char *etag);
495 bool in_initrd(void);
497 int get_home_dir(char **ret);
498 // UNNEEDED int get_shell(char **_ret);
500 static inline void freep(void *p) {
504 static inline void closep(int *fd) {
508 static inline void umaskp(mode_t *u) {
512 static inline void close_pairp(int (*p)[2]) {
516 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
517 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
518 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
519 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
521 #define _cleanup_free_ _cleanup_(freep)
522 #define _cleanup_close_ _cleanup_(closep)
523 #define _cleanup_umask_ _cleanup_(umaskp)
524 #define _cleanup_globfree_ _cleanup_(globfree)
525 #define _cleanup_fclose_ _cleanup_(fclosep)
526 #define _cleanup_pclose_ _cleanup_(pclosep)
527 #define _cleanup_closedir_ _cleanup_(closedirp)
528 #define _cleanup_endmntent_ _cleanup_(endmntentp)
529 #define _cleanup_close_pair_ _cleanup_(close_pairp)
531 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
532 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
535 return malloc(a * b);
538 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
539 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
542 return realloc(p, a * b);
545 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
546 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
549 return memdup(p, a * b);
552 bool filename_is_valid(const char *p) _pure_;
553 bool path_is_safe(const char *p) _pure_;
554 bool string_is_safe(const char *p) _pure_;
555 bool string_has_cc(const char *p, const char *ok) _pure_;
558 * Check if a string contains any glob patterns.
560 _pure_ static inline bool string_is_glob(const char *p) {
561 return !!strpbrk(p, GLOB_CHARS);
564 // UNNEEDED void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
565 // UNNEEDED int (*compar) (const void *, const void *, void *),
566 // UNNEEDED void *arg);
568 #define _(String) gettext (String)
569 #define N_(String) String
570 // UNNEEDED void init_gettext(void);
571 bool is_locale_utf8(void);
573 typedef enum DrawSpecialChar {
578 DRAW_TRIANGULAR_BULLET,
582 _DRAW_SPECIAL_CHAR_MAX
585 const char *draw_special_char(DrawSpecialChar ch);
587 // UNNEEDED char *strreplace(const char *text, const char *old_string, const char *new_string);
589 // UNNEEDED char *strip_tab_ansi(char **p, size_t *l);
591 // UNNEEDED int on_ac_power(void);
593 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
594 // UNNEEDED int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
596 #define FOREACH_LINE(line, f, on_error) \
598 if (!fgets(line, sizeof(line), f)) { \
605 #define FOREACH_DIRENT(de, d, on_error) \
606 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
612 } else if (hidden_file((de)->d_name)) \
616 #define FOREACH_DIRENT_ALL(de, d, on_error) \
617 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
625 static inline void *mempset(void *s, int c, size_t n) {
627 return (uint8_t*)s + n;
630 char *hexmem(const void *p, size_t l);
631 int unhexmem(const char *p, size_t l, void **mem, size_t *len);
633 char *base32hexmem(const void *p, size_t l, bool padding);
634 int unbase32hexmem(const char *p, size_t l, bool padding, void **mem, size_t *len);
636 char *base64mem(const void *p, size_t l);
637 int unbase64mem(const char *p, size_t l, void **mem, size_t *len);
639 char *strextend(char **x, ...) _sentinel_;
640 char *strrep(const char *s, unsigned n);
642 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
643 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
644 #define GREEDY_REALLOC(array, allocated, need) \
645 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
647 #define GREEDY_REALLOC0(array, allocated, need) \
648 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
650 static inline void _reset_errno_(int *saved_errno) {
651 errno = *saved_errno;
654 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
656 static inline int negative_errno(void) {
657 /* This helper should be used to shut up gcc if you know 'errno' is
658 * negative. Instead of "return -errno;", use "return negative_errno();"
659 * It will suppress bogus gcc warnings in case it assumes 'errno' might
660 * be 0 and thus the caller's error-handling might not be triggered. */
661 assert_return(errno > 0, -EINVAL);
665 struct _umask_struct_ {
670 static inline void _reset_umask_(struct _umask_struct_ *s) {
674 #define RUN_WITH_UMASK(mask) \
675 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
676 !_saved_umask_.quit ; \
677 _saved_umask_.quit = true)
679 static inline unsigned u64log2(uint64_t n) {
680 #if __SIZEOF_LONG_LONG__ == 8
681 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
687 static inline unsigned u32ctz(uint32_t n) {
688 #if __SIZEOF_INT__ == 4
689 return __builtin_ctz(n);
695 static inline unsigned log2i(int x) {
698 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
701 static inline unsigned log2u(unsigned x) {
704 return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
707 static inline unsigned log2u_round_up(unsigned x) {
713 return log2u(x - 1) + 1;
716 static inline bool logind_running(void) {
717 return access("/run/systemd/seats/", F_OK) >= 0;
720 #define DECIMAL_STR_WIDTH(x) \
722 typeof(x) _x_ = (x); \
729 int unlink_noerrno(const char *path);
735 _new_ = alloca(_len_); \
736 (void *) memset(_new_, 0, _len_); \
739 /* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */
740 #define alloca_align(size, align) \
743 size_t _mask_ = (align) - 1; \
744 _ptr_ = alloca((size) + _mask_); \
745 (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \
748 #define alloca0_align(size, align) \
751 size_t _size_ = (size); \
752 _new_ = alloca_align(_size_, (align)); \
753 (void*)memset(_new_, 0, _size_); \
756 #define strjoina(a, ...) \
758 const char *_appendees_[] = { a, __VA_ARGS__ }; \
762 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
763 _len_ += strlen(_appendees_[_i_]); \
764 _p_ = _d_ = alloca(_len_ + 1); \
765 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
766 _p_ = stpcpy(_p_, _appendees_[_i_]); \
771 bool id128_is_valid(const char *s) _pure_;
773 // UNNEEDED int split_pair(const char *s, const char *sep, char **l, char **r);
775 // UNNEEDED int shall_restore_state(void);
778 * Normal qsort requires base to be nonnull. Here were require
779 * that only if nmemb > 0.
781 static inline void qsort_safe(void *base, size_t nmemb, size_t size, comparison_fn_t compar) {
786 qsort(base, nmemb, size, compar);
789 /* Normal memmem() requires haystack to be nonnull, which is annoying for zero-length buffers */
790 static inline void *memmem_safe(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen) {
793 return (void*) haystack;
795 if (haystacklen < needlelen)
801 return memmem(haystack, haystacklen, needle, needlelen);
804 int proc_cmdline(char **ret);
805 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
806 int get_proc_cmdline_key(const char *parameter, char **value);
808 int container_get_leader(const char *machine, pid_t *pid);
810 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd);
811 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd);
813 int getpeercred(int fd, struct ucred *ucred);
814 int getpeersec(int fd, char **ret);
816 int writev_safe(int fd, const struct iovec *w, int j);
818 int mkostemp_safe(char *pattern, int flags);
819 // UNNEEDED int open_tmpfile(const char *path, int flags);
821 int fd_warn_permissions(const char *path, int fd);
823 #ifndef PERSONALITY_INVALID
824 /* personality(7) documents that 0xffffffffUL is used for querying the
825 * current personality, hence let's use that here as error
827 #define PERSONALITY_INVALID 0xffffffffLU
830 // UNNEEDED unsigned long personality_from_string(const char *p);
831 // UNNEEDED const char *personality_to_string(unsigned long);
833 uint64_t physical_memory(void);
835 // UNNEEDED void hexdump(FILE *f, const void *p, size_t s);
837 union file_handle_union {
838 struct file_handle handle;
839 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
841 #define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ }
843 // UNNEEDED int update_reboot_param_file(const char *param);
845 // UNNEEDED int umount_recursive(const char *target, int flags);
847 // UNNEEDED int bind_remount_recursive(const char *prefix, bool ro);
849 int fflush_and_check(FILE *f);
851 int tempfn_xxxxxx(const char *p, const char *extra, char **ret);
852 int tempfn_random(const char *p, const char *extra, char **ret);
853 // UNNEEDED int tempfn_random_child(const char *p, const char *extra, char **ret);
855 // UNNEEDED int take_password_lock(const char *root);
857 // UNNEEDED int is_symlink(const char *path);
858 int is_dir(const char *path, bool follow);
859 // UNNEEDED int is_device_node(const char *path);
861 typedef enum ExtractFlags {
863 EXTRACT_CUNESCAPE = 2,
864 EXTRACT_CUNESCAPE_RELAX = 4,
866 EXTRACT_DONT_COALESCE_SEPARATORS = 16,
869 int extract_first_word(const char **p, char **ret, const char *separators, ExtractFlags flags);
870 // UNNEEDED 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);
871 // UNNEEDED int extract_many_words(const char **p, const char *separators, ExtractFlags flags, ...) _sentinel_;
873 static inline void free_and_replace(char **s, char *v) {
878 int free_and_strdup(char **p, const char *s);
880 #define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1)
882 #define FOREACH_INOTIFY_EVENT(e, buffer, sz) \
883 for ((e) = &buffer.ev; \
884 (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \
885 (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len))
887 union inotify_event_buffer {
888 struct inotify_event ev;
889 uint8_t raw[INOTIFY_EVENT_MAX];
893 #define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW)
895 #define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), 0)
898 // UNNEEDED int ptsname_malloc(int fd, char **ret);
900 // UNNEEDED int openpt_in_namespace(pid_t pid, int flags);
902 ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags);
904 // UNNEEDED int fd_setcrtime(int fd, usec_t usec);
905 int fd_getcrtime(int fd, usec_t *usec);
906 // UNNEEDED int path_getcrtime(const char *p, usec_t *usec);
907 // UNNEEDED int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags);
909 // UNNEEDED int same_fd(int a, int b);
911 int chattr_fd(int fd, unsigned value, unsigned mask);
912 // UNNEEDED int chattr_path(const char *p, unsigned value, unsigned mask);
914 int read_attr_fd(int fd, unsigned *ret);
915 // UNNEEDED int read_attr_path(const char *p, unsigned *ret);
917 #define RLIMIT_MAKE_CONST(lim) ((struct rlimit) { lim, lim })
919 // UNNEEDED ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length);
921 void sigkill_wait(pid_t *pid);
922 #define _cleanup_sigkill_wait_ _cleanup_(sigkill_wait)
924 // UNNEEDED int syslog_parse_priority(const char **p, int *priority, bool with_facility);
926 // UNNEEDED void cmsg_close_all(struct msghdr *mh);
928 // UNNEEDED int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath);
930 // UNNEEDED char *shell_escape(const char *s, const char *bad);
931 // UNNEEDED char *shell_maybe_quote(const char *s);
933 int parse_mode(const char *s, mode_t *ret);
935 // UNNEEDED int mount_move_root(const char *path);
937 int reset_uid_gid(void);
939 int getxattr_malloc(const char *path, const char *name, char **value, bool allow_symlink);
940 int fgetxattr_malloc(int fd, const char *name, char **value);