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_;
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 parse_size(const char *t, off_t base, off_t *size);
154 int parse_boolean(const char *v) _pure_;
155 int parse_pid(const char *s, pid_t* ret_pid);
156 int parse_uid(const char *s, uid_t* ret_uid);
157 #define parse_gid(s, ret_gid) parse_uid(s, ret_gid)
159 bool uid_is_valid(uid_t uid);
160 #define gid_is_valid(gid) uid_is_valid(gid)
162 int safe_atou(const char *s, unsigned *ret_u);
163 int safe_atoi(const char *s, int *ret_i);
165 int safe_atollu(const char *s, unsigned long long *ret_u);
166 int safe_atolli(const char *s, long long int *ret_i);
168 int safe_atod(const char *s, double *ret_d);
170 int safe_atou8(const char *s, uint8_t *ret);
172 #if LONG_MAX == INT_MAX
173 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
174 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
175 return safe_atou(s, (unsigned*) ret_u);
177 static inline int safe_atoli(const char *s, long int *ret_u) {
178 assert_cc(sizeof(long int) == sizeof(int));
179 return safe_atoi(s, (int*) ret_u);
182 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
183 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
184 return safe_atollu(s, (unsigned long long*) ret_u);
186 static inline int safe_atoli(const char *s, long int *ret_u) {
187 assert_cc(sizeof(long int) == sizeof(long long int));
188 return safe_atolli(s, (long long int*) ret_u);
192 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
193 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
194 return safe_atou(s, (unsigned*) ret_u);
197 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
198 assert_cc(sizeof(int32_t) == sizeof(int));
199 return safe_atoi(s, (int*) ret_i);
202 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
203 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
204 return safe_atollu(s, (unsigned long long*) ret_u);
207 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
208 assert_cc(sizeof(int64_t) == sizeof(long long int));
209 return safe_atolli(s, (long long int*) ret_i);
212 int safe_atou16(const char *s, uint16_t *ret);
213 int safe_atoi16(const char *s, int16_t *ret);
215 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
217 #define FOREACH_WORD(word, length, s, state) \
218 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
220 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
221 _FOREACH_WORD(word, length, s, separator, false, state)
223 #define FOREACH_WORD_QUOTED(word, length, s, state) \
224 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
226 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
227 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
229 char *strappend(const char *s, const char *suffix);
230 char *strnappend(const char *s, const char *suffix, size_t length);
232 int readlinkat_malloc(int fd, const char *p, char **ret);
233 int readlink_malloc(const char *p, char **r);
234 // UNNEEDED int readlink_value(const char *p, char **ret);
235 int readlink_and_make_absolute(const char *p, char **r);
236 // UNNEEDED int readlink_and_canonicalize(const char *p, char **r);
238 char *strstrip(char *s);
239 // UNNEEDED char *delete_chars(char *s, const char *bad);
240 char *truncate_nl(char *s);
242 char *file_in_same_dir(const char *path, const char *filename);
244 // UNNEEDED int rmdir_parents(const char *path, const char *stop);
246 char hexchar(int x) _const_;
247 int unhexchar(char c) _const_;
248 char octchar(int x) _const_;
249 int unoctchar(char c) _const_;
250 char decchar(int x) _const_;
251 int undecchar(char c) _const_;
252 char base32hexchar(int x) _const_;
253 int unbase32hexchar(char c) _const_;
254 char base64char(int x) _const_;
255 int unbase64char(char c) _const_;
257 char *cescape(const char *s);
258 size_t cescape_char(char c, char *buf);
260 typedef enum UnescapeFlags {
264 int cunescape(const char *s, UnescapeFlags flags, char **ret);
265 int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret);
266 int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret);
268 char *xescape(const char *s, const char *bad);
270 // UNNEEDED char *ascii_strlower(char *path);
272 bool dirent_is_file(const struct dirent *de) _pure_;
273 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
275 bool hidden_file(const char *filename) _pure_;
277 bool chars_intersect(const char *a, const char *b) _pure_;
279 /* For basic lookup tables with strictly enumerated entries */
280 #define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
281 scope const char *name##_to_string(type i) { \
282 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
284 return name##_table[i]; \
287 ssize_t string_table_lookup(const char * const *table, size_t len, const char *key);
289 #define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
290 scope inline type name##_from_string(const char *s) { \
291 return (type)string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
294 #define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
295 _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
296 _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
297 struct __useless_struct_to_allow_trailing_semicolon__
299 #define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,)
300 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static)
301 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static)
302 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static)
304 /* For string conversions where numbers are also acceptable */
305 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
306 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 r = asprintf(&s, "%i", i); \
323 type name##_from_string(const char *s) { \
327 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
328 if (name##_table[i] && \
329 streq(name##_table[i], s)) \
331 if (safe_atou(s, &u) >= 0 && u <= max) \
335 struct __useless_struct_to_allow_trailing_semicolon__
337 int fd_nonblock(int fd, bool nonblock);
338 int fd_cloexec(int fd, bool cloexec);
340 int close_all_fds(const int except[], unsigned n_except);
342 // UNNEEDED bool fstype_is_network(const char *fstype);
344 int flush_fd(int fd);
346 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
348 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
349 int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll);
350 int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
352 bool is_device_path(const char *path);
354 // UNNEEDED int dir_is_empty(const char *path);
355 // UNNEEDED char* dirname_malloc(const char *path);
357 char* lookup_uid(uid_t uid);
358 // UNNEEDED char* getlogname_malloc(void);
359 // UNNEEDED char* getusername_malloc(void);
361 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
362 // UNNEEDED int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
364 bool is_temporary_fs(const struct statfs *s) _pure_;
365 int fd_is_temporary_fs(int fd);
367 int pipe_eof(int fd);
369 DEFINE_TRIVIAL_CLEANUP_FUNC(cpu_set_t*, CPU_FREE);
370 #define _cleanup_cpu_free_ _cleanup_(CPU_FREEp)
372 // UNNEEDED cpu_set_t* cpu_set_malloc(unsigned *ncpus);
374 #define xsprintf(buf, fmt, ...) assert_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf))
376 int files_same(const char *filea, const char *fileb);
378 // UNNEEDED int running_in_chroot(void);
380 char *ellipsize(const char *s, size_t length, unsigned percent);
382 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
384 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
385 int touch(const char *path);
387 noreturn void freeze(void);
389 bool null_or_empty(struct stat *st) _pure_;
390 int null_or_empty_path(const char *fn);
391 // UNNEEDED int null_or_empty_fd(int fd);
393 DIR *xopendirat(int dirfd, const char *name, int flags);
395 // UNNEEDED char *fstab_node_to_udev_node(const char *p);
397 // UNNEEDED void execute_directories(const char* const* directories, usec_t timeout, char *argv[]);
399 bool nulstr_contains(const char*nulstr, const char *needle);
401 // UNNEEDED bool plymouth_running(void);
403 char* strshorten(char *s, size_t l);
405 // UNNEEDED int symlink_idempotent(const char *from, const char *to);
407 // UNNEEDED int symlink_atomic(const char *from, const char *to);
408 // UNNEEDED int mknod_atomic(const char *path, mode_t mode, dev_t dev);
409 // UNNEEDED int mkfifo_atomic(const char *path, mode_t mode);
411 int fchmod_umask(int fd, mode_t mode);
413 bool display_is_local(const char *display) _pure_;
414 int socket_from_display(const char *display, char **path);
416 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
417 int get_group_creds(const char **groupname, gid_t *gid);
419 int in_gid(gid_t gid);
420 // UNNEEDED int in_group(const char *name);
422 char* uid_to_name(uid_t uid);
423 char* gid_to_name(gid_t gid);
425 // UNNEEDED int glob_exists(const char *path);
426 // UNNEEDED int glob_extend(char ***strv, const char *path);
428 int dirent_ensure_type(DIR *d, struct dirent *de);
430 int get_files_in_directory(const char *path, char ***list);
432 char *strjoin(const char *x, ...) _sentinel_;
434 bool is_main_thread(void);
436 static inline bool _pure_ in_charset(const char *s, const char* charset) {
439 return s[strspn(s, charset)] == '\0';
442 // UNNEEDED int block_get_whole_disk(dev_t d, dev_t *ret);
444 #define NULSTR_FOREACH(i, l) \
445 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
447 #define NULSTR_FOREACH_PAIR(i, j, l) \
448 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
450 int ioprio_class_to_string_alloc(int i, char **s);
451 int ioprio_class_from_string(const char *s);
453 const char *sigchld_code_to_string(int i) _const_;
454 int sigchld_code_from_string(const char *s) _pure_;
456 int log_facility_unshifted_to_string_alloc(int i, char **s);
457 int log_facility_unshifted_from_string(const char *s);
459 int log_level_to_string_alloc(int i, char **s);
460 int log_level_from_string(const char *s);
462 int sched_policy_to_string_alloc(int i, char **s);
463 int sched_policy_from_string(const char *s);
465 const char *rlimit_to_string(int i) _const_;
466 int rlimit_from_string(const char *s) _pure_;
468 int ip_tos_to_string_alloc(int i, char **s);
469 int ip_tos_from_string(const char *s);
471 extern int saved_argc;
472 extern char **saved_argv;
474 bool kexec_loaded(void);
476 // UNNEEDED int prot_from_flags(int flags) _const_;
478 // UNNEEDED char *format_bytes(char *buf, size_t l, off_t t);
480 int fd_wait_for_event(int fd, int event, usec_t timeout);
482 void* memdup(const void *p, size_t l) _alloc_(2);
484 int fd_inc_sndbuf(int fd, size_t n);
485 int fd_inc_rcvbuf(int fd, size_t n);
487 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
489 // UNNEEDED int setrlimit_closest(int resource, const struct rlimit *rlim);
491 bool http_url_is_valid(const char *url) _pure_;
492 bool documentation_url_is_valid(const char *url) _pure_;
494 // UNNEEDED bool http_etag_is_valid(const char *etag);
496 bool in_initrd(void);
498 int get_home_dir(char **ret);
499 // UNNEEDED int get_shell(char **_ret);
501 static inline void freep(void *p) {
505 static inline void closep(int *fd) {
509 static inline void umaskp(mode_t *u) {
513 static inline void close_pairp(int (*p)[2]) {
517 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
518 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
519 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
520 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
522 #define _cleanup_free_ _cleanup_(freep)
523 #define _cleanup_close_ _cleanup_(closep)
524 #define _cleanup_umask_ _cleanup_(umaskp)
525 #define _cleanup_globfree_ _cleanup_(globfree)
526 #define _cleanup_fclose_ _cleanup_(fclosep)
527 #define _cleanup_pclose_ _cleanup_(pclosep)
528 #define _cleanup_closedir_ _cleanup_(closedirp)
529 #define _cleanup_endmntent_ _cleanup_(endmntentp)
530 #define _cleanup_close_pair_ _cleanup_(close_pairp)
532 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
533 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
536 return malloc(a * b);
539 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
540 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
543 return realloc(p, a * b);
546 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
547 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
550 return memdup(p, a * b);
553 bool filename_is_valid(const char *p) _pure_;
554 bool path_is_safe(const char *p) _pure_;
555 bool string_is_safe(const char *p) _pure_;
556 bool string_has_cc(const char *p, const char *ok) _pure_;
559 * Check if a string contains any glob patterns.
561 _pure_ static inline bool string_is_glob(const char *p) {
562 return !!strpbrk(p, GLOB_CHARS);
565 // UNNEEDED void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
566 // UNNEEDED int (*compar) (const void *, const void *, void *),
567 // UNNEEDED void *arg);
569 #define _(String) gettext (String)
570 #define N_(String) String
571 // UNNEEDED void init_gettext(void);
572 bool is_locale_utf8(void);
574 typedef enum DrawSpecialChar {
579 DRAW_TRIANGULAR_BULLET,
583 _DRAW_SPECIAL_CHAR_MAX
586 const char *draw_special_char(DrawSpecialChar ch);
588 // UNNEEDED char *strreplace(const char *text, const char *old_string, const char *new_string);
590 // UNNEEDED char *strip_tab_ansi(char **p, size_t *l);
592 // UNNEEDED int on_ac_power(void);
594 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
595 // UNNEEDED int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
597 #define FOREACH_LINE(line, f, on_error) \
599 if (!fgets(line, sizeof(line), f)) { \
606 #define FOREACH_DIRENT(de, d, on_error) \
607 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
613 } else if (hidden_file((de)->d_name)) \
617 #define FOREACH_DIRENT_ALL(de, d, on_error) \
618 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
626 static inline void *mempset(void *s, int c, size_t n) {
628 return (uint8_t*)s + n;
631 char *hexmem(const void *p, size_t l);
632 int unhexmem(const char *p, size_t l, void **mem, size_t *len);
634 char *base32hexmem(const void *p, size_t l, bool padding);
635 int unbase32hexmem(const char *p, size_t l, bool padding, void **mem, size_t *len);
637 char *base64mem(const void *p, size_t l);
638 int unbase64mem(const char *p, size_t l, void **mem, size_t *len);
640 char *strextend(char **x, ...) _sentinel_;
641 char *strrep(const char *s, unsigned n);
643 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
644 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
645 #define GREEDY_REALLOC(array, allocated, need) \
646 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
648 #define GREEDY_REALLOC0(array, allocated, need) \
649 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
651 static inline void _reset_errno_(int *saved_errno) {
652 errno = *saved_errno;
655 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
657 static inline int negative_errno(void) {
658 /* This helper should be used to shut up gcc if you know 'errno' is
659 * negative. Instead of "return -errno;", use "return negative_errno();"
660 * It will suppress bogus gcc warnings in case it assumes 'errno' might
661 * be 0 and thus the caller's error-handling might not be triggered. */
662 assert_return(errno > 0, -EINVAL);
666 struct _umask_struct_ {
671 static inline void _reset_umask_(struct _umask_struct_ *s) {
675 #define RUN_WITH_UMASK(mask) \
676 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
677 !_saved_umask_.quit ; \
678 _saved_umask_.quit = true)
680 static inline unsigned u64log2(uint64_t n) {
681 #if __SIZEOF_LONG_LONG__ == 8
682 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
688 static inline unsigned u32ctz(uint32_t n) {
689 #if __SIZEOF_INT__ == 4
690 return __builtin_ctz(n);
696 static inline unsigned log2i(int x) {
699 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
702 static inline unsigned log2u(unsigned x) {
705 return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
708 static inline unsigned log2u_round_up(unsigned x) {
714 return log2u(x - 1) + 1;
717 static inline bool logind_running(void) {
718 return access("/run/systemd/seats/", F_OK) >= 0;
721 #define DECIMAL_STR_WIDTH(x) \
723 typeof(x) _x_ = (x); \
730 int unlink_noerrno(const char *path);
736 _new_ = alloca(_len_); \
737 (void *) memset(_new_, 0, _len_); \
740 /* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */
741 #define alloca_align(size, align) \
744 size_t _mask_ = (align) - 1; \
745 _ptr_ = alloca((size) + _mask_); \
746 (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \
749 #define alloca0_align(size, align) \
752 size_t _size_ = (size); \
753 _new_ = alloca_align(_size_, (align)); \
754 (void*)memset(_new_, 0, _size_); \
757 #define strjoina(a, ...) \
759 const char *_appendees_[] = { a, __VA_ARGS__ }; \
763 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
764 _len_ += strlen(_appendees_[_i_]); \
765 _p_ = _d_ = alloca(_len_ + 1); \
766 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
767 _p_ = stpcpy(_p_, _appendees_[_i_]); \
772 bool id128_is_valid(const char *s) _pure_;
774 // UNNEEDED int split_pair(const char *s, const char *sep, char **l, char **r);
776 // UNNEEDED int shall_restore_state(void);
779 * Normal qsort requires base to be nonnull. Here were require
780 * that only if nmemb > 0.
782 static inline void qsort_safe(void *base, size_t nmemb, size_t size, comparison_fn_t compar) {
787 qsort(base, nmemb, size, compar);
790 /* Normal memmem() requires haystack to be nonnull, which is annoying for zero-length buffers */
791 static inline void *memmem_safe(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen) {
794 return (void*) haystack;
796 if (haystacklen < needlelen)
802 return memmem(haystack, haystacklen, needle, needlelen);
805 int proc_cmdline(char **ret);
806 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
807 int get_proc_cmdline_key(const char *parameter, char **value);
809 int container_get_leader(const char *machine, pid_t *pid);
811 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd);
812 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd);
814 int getpeercred(int fd, struct ucred *ucred);
815 int getpeersec(int fd, char **ret);
817 int writev_safe(int fd, const struct iovec *w, int j);
819 int mkostemp_safe(char *pattern, int flags);
820 // UNNEEDED int open_tmpfile(const char *path, int flags);
822 int fd_warn_permissions(const char *path, int fd);
824 #ifndef PERSONALITY_INVALID
825 /* personality(7) documents that 0xffffffffUL is used for querying the
826 * current personality, hence let's use that here as error
828 #define PERSONALITY_INVALID 0xffffffffLU
831 // UNNEEDED unsigned long personality_from_string(const char *p);
832 // UNNEEDED const char *personality_to_string(unsigned long);
834 uint64_t physical_memory(void);
836 // UNNEEDED void hexdump(FILE *f, const void *p, size_t s);
838 union file_handle_union {
839 struct file_handle handle;
840 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
842 #define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ }
844 // UNNEEDED int update_reboot_param_file(const char *param);
846 // UNNEEDED int umount_recursive(const char *target, int flags);
848 // UNNEEDED int bind_remount_recursive(const char *prefix, bool ro);
850 int fflush_and_check(FILE *f);
852 int tempfn_xxxxxx(const char *p, const char *extra, char **ret);
853 int tempfn_random(const char *p, const char *extra, char **ret);
854 // UNNEEDED int tempfn_random_child(const char *p, const char *extra, char **ret);
856 // UNNEEDED int take_password_lock(const char *root);
858 // UNNEEDED int is_symlink(const char *path);
859 int is_dir(const char *path, bool follow);
860 // UNNEEDED int is_device_node(const char *path);
862 typedef enum ExtractFlags {
864 EXTRACT_CUNESCAPE = 2,
865 EXTRACT_CUNESCAPE_RELAX = 4,
867 EXTRACT_DONT_COALESCE_SEPARATORS = 16,
870 int extract_first_word(const char **p, char **ret, const char *separators, ExtractFlags flags);
871 // 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);
872 // UNNEEDED int extract_many_words(const char **p, const char *separators, ExtractFlags flags, ...) _sentinel_;
874 static inline void free_and_replace(char **s, char *v) {
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];
893 #define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW)
895 // UNNEEDED int ptsname_malloc(int fd, char **ret);
897 // UNNEEDED int openpt_in_namespace(pid_t pid, int flags);
899 ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags);
901 // UNNEEDED int fd_setcrtime(int fd, usec_t usec);
902 int fd_getcrtime(int fd, usec_t *usec);
903 // UNNEEDED int path_getcrtime(const char *p, usec_t *usec);
904 // UNNEEDED int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags);
906 // UNNEEDED int same_fd(int a, int b);
908 int chattr_fd(int fd, unsigned value, unsigned mask);
909 // UNNEEDED int chattr_path(const char *p, unsigned value, unsigned mask);
911 int read_attr_fd(int fd, unsigned *ret);
912 // UNNEEDED int read_attr_path(const char *p, unsigned *ret);
914 #define RLIMIT_MAKE_CONST(lim) ((struct rlimit) { lim, lim })
916 // UNNEEDED ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length);
918 void sigkill_wait(pid_t *pid);
919 #define _cleanup_sigkill_wait_ _cleanup_(sigkill_wait)
921 // UNNEEDED int syslog_parse_priority(const char **p, int *priority, bool with_facility);
923 // UNNEEDED void cmsg_close_all(struct msghdr *mh);
925 // UNNEEDED int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath);
927 char *shell_escape(const char *s, const char *bad);
928 char *shell_maybe_quote(const char *s);
930 int parse_mode(const char *s, mode_t *ret);
932 // UNNEEDED int mount_move_root(const char *path);
934 int reset_uid_gid(void);
936 int getxattr_malloc(const char *path, const char *name, char **value, bool allow_symlink);
937 int fgetxattr_malloc(int fd, const char *name, char **value);