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/>.
36 #include <sys/inotify.h>
37 #include <sys/socket.h>
39 #include <sys/statfs.h>
40 #include <sys/sysmacros.h>
41 #include <sys/types.h>
45 #include "formats-util.h"
48 #include "time-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_;
74 int strcmp_ptr(const char *a, const char *b) _pure_;
76 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
78 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
80 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
82 #define newa0(t, n) ((t*) alloca0(sizeof(t)*(n)))
84 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
86 #define malloc0(n) (calloc(1, (n)))
88 static inline void *mfree(void *memory) {
93 static inline const char* yes_no(bool b) {
94 return b ? "yes" : "no";
97 static inline const char* true_false(bool b) {
98 return b ? "true" : "false";
101 static inline const char* one_zero(bool b) {
102 return b ? "1" : "0";
105 static inline const char* strempty(const char *s) {
109 static inline const char* strnull(const char *s) {
110 return s ? s : "(null)";
113 static inline const char *strna(const char *s) {
114 return s ? s : "n/a";
117 static inline bool isempty(const char *p) {
121 static inline char *startswith(const char *s, const char *prefix) {
125 if (strncmp(s, prefix, l) == 0)
126 return (char*) s + l;
131 static inline char *startswith_no_case(const char *s, const char *prefix) {
135 if (strncasecmp(s, prefix, l) == 0)
136 return (char*) s + l;
141 char *endswith(const char *s, const char *postfix) _pure_;
142 char *endswith_no_case(const char *s, const char *postfix) _pure_;
144 char *first_word(const char *s, const char *word) _pure_;
146 int close_nointr(int fd);
147 int safe_close(int fd);
148 void safe_close_pair(int p[]);
150 void close_many(const int fds[], unsigned n_fd);
152 int fclose_nointr(FILE *f);
153 FILE* safe_fclose(FILE *f);
154 DIR* safe_closedir(DIR *f);
156 int parse_size(const char *t, uint64_t base, uint64_t *size);
158 int parse_boolean(const char *v) _pure_;
159 int parse_pid(const char *s, pid_t* ret_pid);
160 int parse_uid(const char *s, uid_t* ret_uid);
161 #define parse_gid(s, ret_gid) parse_uid(s, ret_gid)
163 bool uid_is_valid(uid_t uid);
165 static inline bool gid_is_valid(gid_t gid) {
166 return uid_is_valid((uid_t) gid);
169 int safe_atou(const char *s, unsigned *ret_u);
170 int safe_atoi(const char *s, int *ret_i);
172 int safe_atollu(const char *s, unsigned long long *ret_u);
173 int safe_atolli(const char *s, long long int *ret_i);
175 int safe_atod(const char *s, double *ret_d);
177 int safe_atou8(const char *s, uint8_t *ret);
179 #if LONG_MAX == INT_MAX
180 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
181 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
182 return safe_atou(s, (unsigned*) ret_u);
184 static inline int safe_atoli(const char *s, long int *ret_u) {
185 assert_cc(sizeof(long int) == sizeof(int));
186 return safe_atoi(s, (int*) ret_u);
189 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
190 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
191 return safe_atollu(s, (unsigned long long*) ret_u);
193 static inline int safe_atoli(const char *s, long int *ret_u) {
194 assert_cc(sizeof(long int) == sizeof(long long int));
195 return safe_atolli(s, (long long int*) ret_u);
199 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
200 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
201 return safe_atou(s, (unsigned*) ret_u);
204 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
205 assert_cc(sizeof(int32_t) == sizeof(int));
206 return safe_atoi(s, (int*) ret_i);
209 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
210 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
211 return safe_atollu(s, (unsigned long long*) ret_u);
214 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
215 assert_cc(sizeof(int64_t) == sizeof(long long int));
216 return safe_atolli(s, (long long int*) ret_i);
219 int safe_atou16(const char *s, uint16_t *ret);
220 int safe_atoi16(const char *s, int16_t *ret);
222 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
224 #define FOREACH_WORD(word, length, s, state) \
225 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
227 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
228 _FOREACH_WORD(word, length, s, separator, false, state)
230 #define FOREACH_WORD_QUOTED(word, length, s, state) \
231 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
233 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
234 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
236 char *strappend(const char *s, const char *suffix);
237 char *strnappend(const char *s, const char *suffix, size_t length);
239 int readlinkat_malloc(int fd, const char *p, char **ret);
240 int readlink_malloc(const char *p, char **r);
241 // UNNEEDED int readlink_value(const char *p, char **ret);
242 int readlink_and_make_absolute(const char *p, char **r);
243 // UNNEEDED int readlink_and_canonicalize(const char *p, char **r);
245 char *strstrip(char *s);
246 // UNNEEDED char *delete_chars(char *s, const char *bad);
247 char *truncate_nl(char *s);
249 char *file_in_same_dir(const char *path, const char *filename);
251 // UNNEEDED int rmdir_parents(const char *path, const char *stop);
253 char hexchar(int x) _const_;
254 int unhexchar(char c) _const_;
255 char octchar(int x) _const_;
256 int unoctchar(char c) _const_;
257 char decchar(int x) _const_;
258 int undecchar(char c) _const_;
259 char base32hexchar(int x) _const_;
260 int unbase32hexchar(char c) _const_;
261 char base64char(int x) _const_;
262 int unbase64char(char c) _const_;
264 char *cescape(const char *s);
265 size_t cescape_char(char c, char *buf);
267 typedef enum UnescapeFlags {
271 int cunescape(const char *s, UnescapeFlags flags, char **ret);
272 int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret);
273 int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret);
275 char *xescape(const char *s, const char *bad);
277 // UNNEEDED char *ascii_strlower(char *path);
279 bool dirent_is_file(const struct dirent *de) _pure_;
280 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
282 bool hidden_file(const char *filename) _pure_;
284 bool chars_intersect(const char *a, const char *b) _pure_;
286 /* For basic lookup tables with strictly enumerated entries */
287 #define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
288 scope const char *name##_to_string(type i) { \
289 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
291 return name##_table[i]; \
294 ssize_t string_table_lookup(const char * const *table, size_t len, const char *key);
296 #define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
297 scope type name##_from_string(const char *s) { \
298 return (type) string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
301 #define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
302 _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
303 _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
304 struct __useless_struct_to_allow_trailing_semicolon__
306 #define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,)
307 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static)
308 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static)
309 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static)
311 /* For string conversions where numbers are also acceptable */
312 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
313 int name##_to_string_alloc(type i, char **str) { \
315 if (i < 0 || i > max) \
317 if (i < (type) ELEMENTSOF(name##_table)) { \
318 s = strdup(name##_table[i]); \
322 if (asprintf(&s, "%i", i) < 0) \
328 type name##_from_string(const char *s) { \
333 for (i = 0; i < (type) ELEMENTSOF(name##_table); i++) \
334 if (streq_ptr(name##_table[i], s)) \
336 if (safe_atou(s, &u) >= 0 && u <= max) \
340 struct __useless_struct_to_allow_trailing_semicolon__
342 int fd_nonblock(int fd, bool nonblock);
343 int fd_cloexec(int fd, bool cloexec);
345 int close_all_fds(const int except[], unsigned n_except);
347 // UNNEEDED bool fstype_is_network(const char *fstype);
349 int flush_fd(int fd);
351 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
353 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
354 int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll);
355 int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
357 bool is_device_path(const char *path);
359 // UNNEEDED int dir_is_empty(const char *path);
360 // UNNEEDED char* dirname_malloc(const char *path);
362 char* lookup_uid(uid_t uid);
363 // UNNEEDED char* getlogname_malloc(void);
364 // UNNEEDED char* getusername_malloc(void);
366 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
367 // UNNEEDED int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
369 bool is_temporary_fs(const struct statfs *s) _pure_;
370 int fd_is_temporary_fs(int fd);
372 int pipe_eof(int fd);
374 #define xsprintf(buf, fmt, ...) \
375 assert_message_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf), \
376 "xsprintf: " #buf "[] must be big enough")
378 int files_same(const char *filea, const char *fileb);
380 int running_in_chroot(void);
382 char *ellipsize(const char *s, size_t length, unsigned percent);
384 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
386 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
387 int touch(const char *path);
389 noreturn void freeze(void);
391 bool null_or_empty(struct stat *st) _pure_;
392 int null_or_empty_path(const char *fn);
393 // UNNEEDED int null_or_empty_fd(int fd);
395 DIR *xopendirat(int dirfd, const char *name, int flags);
397 // UNNEEDED char *fstab_node_to_udev_node(const char *p);
399 void execute_directories(const char* const* directories, usec_t timeout, char *argv[]);
401 bool nulstr_contains(const char*nulstr, const char *needle);
403 // UNNEEDED bool plymouth_running(void);
405 char* strshorten(char *s, size_t l);
407 // UNNEEDED int symlink_idempotent(const char *from, const char *to);
409 // UNNEEDED int symlink_atomic(const char *from, const char *to);
410 // UNNEEDED int mknod_atomic(const char *path, mode_t mode, dev_t dev);
411 // UNNEEDED int mkfifo_atomic(const char *path, mode_t mode);
413 int fchmod_umask(int fd, mode_t mode);
415 bool display_is_local(const char *display) _pure_;
416 int socket_from_display(const char *display, char **path);
418 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
419 int get_group_creds(const char **groupname, gid_t *gid);
421 int in_gid(gid_t gid);
422 // UNNEEDED int in_group(const char *name);
424 char* uid_to_name(uid_t uid);
425 char* gid_to_name(gid_t gid);
427 // UNNEEDED int glob_exists(const char *path);
428 // UNNEEDED int glob_extend(char ***strv, const char *path);
430 int dirent_ensure_type(DIR *d, struct dirent *de);
432 int get_files_in_directory(const char *path, char ***list);
434 char *strjoin(const char *x, ...) _sentinel_;
436 bool is_main_thread(void);
438 static inline bool _pure_ in_charset(const char *s, const char* charset) {
441 return s[strspn(s, charset)] == '\0';
444 // UNNEEDED int block_get_whole_disk(dev_t d, dev_t *ret);
446 #define NULSTR_FOREACH(i, l) \
447 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
449 #define NULSTR_FOREACH_PAIR(i, j, l) \
450 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
452 int ioprio_class_to_string_alloc(int i, char **s);
453 int ioprio_class_from_string(const char *s);
455 // UNNEEDED const char *sigchld_code_to_string(int i) _const_;
456 // UNNEEDED int sigchld_code_from_string(const char *s) _pure_;
458 // UNNEEDED int log_facility_unshifted_to_string_alloc(int i, char **s);
459 // UNNEEDED int log_facility_unshifted_from_string(const char *s);
461 int log_level_to_string_alloc(int i, char **s);
462 int log_level_from_string(const char *s);
464 // UNNEEDED int sched_policy_to_string_alloc(int i, char **s);
465 // UNNEEDED int sched_policy_from_string(const char *s);
467 const char *rlimit_to_string(int i) _const_;
468 int rlimit_from_string(const char *s) _pure_;
470 // UNNEEDED int ip_tos_to_string_alloc(int i, char **s);
471 // UNNEEDED int ip_tos_from_string(const char *s);
473 extern int saved_argc;
474 extern char **saved_argv;
476 // UNNEEDED bool kexec_loaded(void);
478 // UNNEEDED int prot_from_flags(int flags) _const_;
480 // UNNEEDED char *format_bytes(char *buf, size_t l, off_t t);
482 int fd_wait_for_event(int fd, int event, usec_t timeout);
484 void* memdup(const void *p, size_t l) _alloc_(2);
486 int fd_inc_sndbuf(int fd, size_t n);
487 int fd_inc_rcvbuf(int fd, size_t n);
489 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
491 // UNNEEDED int setrlimit_closest(int resource, const struct rlimit *rlim);
493 bool http_url_is_valid(const char *url) _pure_;
494 bool documentation_url_is_valid(const char *url) _pure_;
496 // UNNEEDED bool http_etag_is_valid(const char *etag);
498 bool in_initrd(void);
500 int get_home_dir(char **ret);
501 // UNNEEDED int get_shell(char **_ret);
503 static inline void freep(void *p) {
507 static inline void closep(int *fd) {
511 static inline void umaskp(mode_t *u) {
515 static inline void close_pairp(int (*p)[2]) {
519 static inline void fclosep(FILE **f) {
523 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
524 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
525 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
527 #define _cleanup_free_ _cleanup_(freep)
528 #define _cleanup_close_ _cleanup_(closep)
529 #define _cleanup_umask_ _cleanup_(umaskp)
530 #define _cleanup_globfree_ _cleanup_(globfree)
531 #define _cleanup_fclose_ _cleanup_(fclosep)
532 #define _cleanup_pclose_ _cleanup_(pclosep)
533 #define _cleanup_closedir_ _cleanup_(closedirp)
534 #define _cleanup_endmntent_ _cleanup_(endmntentp)
535 #define _cleanup_close_pair_ _cleanup_(close_pairp)
537 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
538 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
541 return malloc(a * b);
544 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
545 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
548 return realloc(p, a * b);
551 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
552 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
555 return memdup(p, a * b);
558 bool filename_is_valid(const char *p) _pure_;
559 bool path_is_safe(const char *p) _pure_;
560 bool string_is_safe(const char *p) _pure_;
561 bool string_has_cc(const char *p, const char *ok) _pure_;
564 * Check if a string contains any glob patterns.
566 _pure_ static inline bool string_is_glob(const char *p) {
567 return !!strpbrk(p, GLOB_CHARS);
570 // UNNEEDED void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
571 // UNNEEDED int (*compar) (const void *, const void *, void *),
572 // UNNEEDED void *arg);
574 #define _(String) gettext (String)
575 #define N_(String) String
576 // UNNEEDED void init_gettext(void);
577 bool is_locale_utf8(void);
579 typedef enum DrawSpecialChar {
584 DRAW_TRIANGULAR_BULLET,
588 _DRAW_SPECIAL_CHAR_MAX
591 const char *draw_special_char(DrawSpecialChar ch);
593 // UNNEEDED char *strreplace(const char *text, const char *old_string, const char *new_string);
595 // UNNEEDED char *strip_tab_ansi(char **p, size_t *l);
597 // UNNEEDED int on_ac_power(void);
599 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
600 // UNNEEDED int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
602 #define FOREACH_LINE(line, f, on_error) \
604 if (!fgets(line, sizeof(line), f)) { \
611 #define FOREACH_DIRENT(de, d, on_error) \
612 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
618 } else if (hidden_file((de)->d_name)) \
622 #define FOREACH_DIRENT_ALL(de, d, on_error) \
623 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
631 static inline void *mempset(void *s, int c, size_t n) {
633 return (uint8_t*)s + n;
636 char *hexmem(const void *p, size_t l);
637 int unhexmem(const char *p, size_t l, void **mem, size_t *len);
639 char *base32hexmem(const void *p, size_t l, bool padding);
640 int unbase32hexmem(const char *p, size_t l, bool padding, void **mem, size_t *len);
642 char *base64mem(const void *p, size_t l);
643 int unbase64mem(const char *p, size_t l, void **mem, size_t *len);
645 char *strextend(char **x, ...) _sentinel_;
646 char *strrep(const char *s, unsigned n);
648 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
649 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
650 #define GREEDY_REALLOC(array, allocated, need) \
651 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
653 #define GREEDY_REALLOC0(array, allocated, need) \
654 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
656 static inline void _reset_errno_(int *saved_errno) {
657 errno = *saved_errno;
660 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
662 static inline int negative_errno(void) {
663 /* This helper should be used to shut up gcc if you know 'errno' is
664 * negative. Instead of "return -errno;", use "return negative_errno();"
665 * It will suppress bogus gcc warnings in case it assumes 'errno' might
666 * be 0 and thus the caller's error-handling might not be triggered. */
667 assert_return(errno > 0, -EINVAL);
671 struct _umask_struct_ {
676 static inline void _reset_umask_(struct _umask_struct_ *s) {
680 #define RUN_WITH_UMASK(mask) \
681 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
682 !_saved_umask_.quit ; \
683 _saved_umask_.quit = true)
685 static inline unsigned u64log2(uint64_t n) {
686 #if __SIZEOF_LONG_LONG__ == 8
687 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
693 static inline unsigned u32ctz(uint32_t n) {
694 #if __SIZEOF_INT__ == 4
695 return __builtin_ctz(n);
701 static inline unsigned log2i(int x) {
704 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
707 static inline unsigned log2u(unsigned x) {
710 return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
713 static inline unsigned log2u_round_up(unsigned x) {
719 return log2u(x - 1) + 1;
722 static inline bool logind_running(void) {
723 return access("/run/systemd/seats/", F_OK) >= 0;
726 #define DECIMAL_STR_WIDTH(x) \
728 typeof(x) _x_ = (x); \
735 int unlink_noerrno(const char *path);
741 _new_ = alloca(_len_); \
742 (void *) memset(_new_, 0, _len_); \
745 /* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */
746 #define alloca_align(size, align) \
749 size_t _mask_ = (align) - 1; \
750 _ptr_ = alloca((size) + _mask_); \
751 (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \
754 #define alloca0_align(size, align) \
757 size_t _size_ = (size); \
758 _new_ = alloca_align(_size_, (align)); \
759 (void*)memset(_new_, 0, _size_); \
762 #define strjoina(a, ...) \
764 const char *_appendees_[] = { a, __VA_ARGS__ }; \
768 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
769 _len_ += strlen(_appendees_[_i_]); \
770 _p_ = _d_ = alloca(_len_ + 1); \
771 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
772 _p_ = stpcpy(_p_, _appendees_[_i_]); \
777 bool id128_is_valid(const char *s) _pure_;
779 // UNNEEDED int split_pair(const char *s, const char *sep, char **l, char **r);
781 // UNNEEDED int shall_restore_state(void);
784 * Normal qsort requires base to be nonnull. Here were require
785 * that only if nmemb > 0.
787 static inline void qsort_safe(void *base, size_t nmemb, size_t size, comparison_fn_t compar) {
792 qsort(base, nmemb, size, compar);
795 /* Normal memmem() requires haystack to be nonnull, which is annoying for zero-length buffers */
796 static inline void *memmem_safe(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen) {
799 return (void*) haystack;
801 if (haystacklen < needlelen)
807 return memmem(haystack, haystacklen, needle, needlelen);
810 int proc_cmdline(char **ret);
811 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
812 int get_proc_cmdline_key(const char *parameter, char **value);
814 int container_get_leader(const char *machine, pid_t *pid);
816 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd);
817 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd);
819 int getpeercred(int fd, struct ucred *ucred);
820 int getpeersec(int fd, char **ret);
822 int writev_safe(int fd, const struct iovec *w, int j);
824 int mkostemp_safe(char *pattern, int flags);
825 // UNNEEDED int open_tmpfile(const char *path, int flags);
827 int fd_warn_permissions(const char *path, int fd);
829 #ifndef PERSONALITY_INVALID
830 /* personality(7) documents that 0xffffffffUL is used for querying the
831 * current personality, hence let's use that here as error
833 #define PERSONALITY_INVALID 0xffffffffLU
836 // UNNEEDED unsigned long personality_from_string(const char *p);
837 // UNNEEDED const char *personality_to_string(unsigned long);
839 uint64_t physical_memory(void);
841 // UNNEEDED void hexdump(FILE *f, const void *p, size_t s);
843 union file_handle_union {
844 struct file_handle handle;
845 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
847 #define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ }
849 // UNNEEDED int update_reboot_param_file(const char *param);
851 // UNNEEDED int umount_recursive(const char *target, int flags);
853 // UNNEEDED int bind_remount_recursive(const char *prefix, bool ro);
855 int fflush_and_check(FILE *f);
857 int tempfn_xxxxxx(const char *p, const char *extra, char **ret);
858 int tempfn_random(const char *p, const char *extra, char **ret);
859 // UNNEEDED int tempfn_random_child(const char *p, const char *extra, char **ret);
861 // UNNEEDED int take_password_lock(const char *root);
863 // UNNEEDED int is_symlink(const char *path);
864 int is_dir(const char *path, bool follow);
865 // UNNEEDED int is_device_node(const char *path);
867 typedef enum ExtractFlags {
869 EXTRACT_CUNESCAPE = 2,
870 EXTRACT_CUNESCAPE_RELAX = 4,
872 EXTRACT_DONT_COALESCE_SEPARATORS = 16,
875 int extract_first_word(const char **p, char **ret, const char *separators, ExtractFlags flags);
876 // 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);
877 // UNNEEDED int extract_many_words(const char **p, const char *separators, ExtractFlags flags, ...) _sentinel_;
879 int free_and_strdup(char **p, const char *s);
881 #define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1)
883 #define FOREACH_INOTIFY_EVENT(e, buffer, sz) \
884 for ((e) = &buffer.ev; \
885 (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \
886 (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len))
888 union inotify_event_buffer {
889 struct inotify_event ev;
890 uint8_t raw[INOTIFY_EVENT_MAX];
894 #define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW)
896 #define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), 0)
899 // UNNEEDED int ptsname_malloc(int fd, char **ret);
901 // UNNEEDED int openpt_in_namespace(pid_t pid, int flags);
903 ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags);
905 // UNNEEDED int fd_setcrtime(int fd, usec_t usec);
906 int fd_getcrtime(int fd, usec_t *usec);
907 // UNNEEDED int path_getcrtime(const char *p, usec_t *usec);
908 // UNNEEDED int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags);
910 // UNNEEDED int same_fd(int a, int b);
912 // UNNEEDED int chattr_fd(int fd, unsigned value, unsigned mask);
913 // UNNEEDED int chattr_path(const char *p, unsigned value, unsigned mask);
915 // UNNEEDED int read_attr_fd(int fd, unsigned *ret);
916 // UNNEEDED int read_attr_path(const char *p, unsigned *ret);
918 #define RLIMIT_MAKE_CONST(lim) ((struct rlimit) { lim, lim })
920 // UNNEEDED ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length);
922 void sigkill_wait(pid_t *pid);
923 #define _cleanup_sigkill_wait_ _cleanup_(sigkill_wait)
925 // UNNEEDED int syslog_parse_priority(const char **p, int *priority, bool with_facility);
927 // UNNEEDED void cmsg_close_all(struct msghdr *mh);
929 // UNNEEDED int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath);
931 // UNNEEDED char *shell_escape(const char *s, const char *bad);
932 // UNNEEDED char *shell_maybe_quote(const char *s);
934 int parse_mode(const char *s, mode_t *ret);
936 // UNNEEDED int mount_move_root(const char *path);
938 int reset_uid_gid(void);
940 int getxattr_malloc(const char *path, const char *name, char **value, bool allow_symlink);
941 int fgetxattr_malloc(int fd, const char *name, char **value);
943 int send_one_fd(int transport_fd, int fd, int flags);
944 // UNNEEDED int receive_one_fd(int transport_fd, int flags);
946 // UNNEEDED void nop_signal_handler(int sig);
950 // UNNEEDED bool fdname_is_valid(const char *s);