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 inline 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) { \
310 if (i < 0 || i > max) \
312 if (i < (type) ELEMENTSOF(name##_table)) { \
313 s = strdup(name##_table[i]); \
317 r = asprintf(&s, "%i", i); \
324 type name##_from_string(const char *s) { \
328 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
329 if (name##_table[i] && \
330 streq(name##_table[i], s)) \
332 if (safe_atou(s, &u) >= 0 && u <= max) \
336 struct __useless_struct_to_allow_trailing_semicolon__
338 int fd_nonblock(int fd, bool nonblock);
339 int fd_cloexec(int fd, bool cloexec);
341 int close_all_fds(const int except[], unsigned n_except);
343 // UNNEEDED bool fstype_is_network(const char *fstype);
345 int flush_fd(int fd);
347 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
349 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
350 int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll);
351 int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
353 bool is_device_path(const char *path);
355 // UNNEEDED int dir_is_empty(const char *path);
356 // UNNEEDED char* dirname_malloc(const char *path);
358 char* lookup_uid(uid_t uid);
359 // UNNEEDED char* getlogname_malloc(void);
360 // UNNEEDED char* getusername_malloc(void);
362 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
363 // UNNEEDED int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
365 bool is_temporary_fs(const struct statfs *s) _pure_;
366 int fd_is_temporary_fs(int fd);
368 int pipe_eof(int fd);
370 DEFINE_TRIVIAL_CLEANUP_FUNC(cpu_set_t*, CPU_FREE);
371 #define _cleanup_cpu_free_ _cleanup_(CPU_FREEp)
373 // UNNEEDED cpu_set_t* cpu_set_malloc(unsigned *ncpus);
375 #define xsprintf(buf, fmt, ...) assert_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf))
377 int files_same(const char *filea, const char *fileb);
379 int running_in_chroot(void);
381 char *ellipsize(const char *s, size_t length, unsigned percent);
383 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
385 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
386 int touch(const char *path);
388 noreturn void freeze(void);
390 bool null_or_empty(struct stat *st) _pure_;
391 int null_or_empty_path(const char *fn);
392 // UNNEEDED int null_or_empty_fd(int fd);
394 DIR *xopendirat(int dirfd, const char *name, int flags);
396 // UNNEEDED char *fstab_node_to_udev_node(const char *p);
398 void execute_directories(const char* const* directories, usec_t timeout, char *argv[]);
400 bool nulstr_contains(const char*nulstr, const char *needle);
402 // UNNEEDED bool plymouth_running(void);
404 char* strshorten(char *s, size_t l);
406 // UNNEEDED int symlink_idempotent(const char *from, const char *to);
408 // UNNEEDED int symlink_atomic(const char *from, const char *to);
409 // UNNEEDED int mknod_atomic(const char *path, mode_t mode, dev_t dev);
410 // UNNEEDED int mkfifo_atomic(const char *path, mode_t mode);
412 int fchmod_umask(int fd, mode_t mode);
414 bool display_is_local(const char *display) _pure_;
415 int socket_from_display(const char *display, char **path);
417 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
418 int get_group_creds(const char **groupname, gid_t *gid);
420 int in_gid(gid_t gid);
421 // UNNEEDED int in_group(const char *name);
423 char* uid_to_name(uid_t uid);
424 char* gid_to_name(gid_t gid);
426 // UNNEEDED int glob_exists(const char *path);
427 // UNNEEDED int glob_extend(char ***strv, const char *path);
429 int dirent_ensure_type(DIR *d, struct dirent *de);
431 int get_files_in_directory(const char *path, char ***list);
433 char *strjoin(const char *x, ...) _sentinel_;
435 bool is_main_thread(void);
437 static inline bool _pure_ in_charset(const char *s, const char* charset) {
440 return s[strspn(s, charset)] == '\0';
443 // UNNEEDED int block_get_whole_disk(dev_t d, dev_t *ret);
445 #define NULSTR_FOREACH(i, l) \
446 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
448 #define NULSTR_FOREACH_PAIR(i, j, l) \
449 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
451 int ioprio_class_to_string_alloc(int i, char **s);
452 int ioprio_class_from_string(const char *s);
454 const char *sigchld_code_to_string(int i) _const_;
455 int sigchld_code_from_string(const char *s) _pure_;
457 int log_facility_unshifted_to_string_alloc(int i, char **s);
458 int log_facility_unshifted_from_string(const char *s);
460 int log_level_to_string_alloc(int i, char **s);
461 int log_level_from_string(const char *s);
463 int sched_policy_to_string_alloc(int i, char **s);
464 int sched_policy_from_string(const char *s);
466 const char *rlimit_to_string(int i) _const_;
467 int rlimit_from_string(const char *s) _pure_;
469 int ip_tos_to_string_alloc(int i, char **s);
470 int ip_tos_from_string(const char *s);
472 extern int saved_argc;
473 extern char **saved_argv;
475 bool kexec_loaded(void);
477 // UNNEEDED int prot_from_flags(int flags) _const_;
479 // UNNEEDED char *format_bytes(char *buf, size_t l, off_t t);
481 int fd_wait_for_event(int fd, int event, usec_t timeout);
483 void* memdup(const void *p, size_t l) _alloc_(2);
485 int fd_inc_sndbuf(int fd, size_t n);
486 int fd_inc_rcvbuf(int fd, size_t n);
488 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
490 // UNNEEDED int setrlimit_closest(int resource, const struct rlimit *rlim);
492 bool http_url_is_valid(const char *url) _pure_;
493 bool documentation_url_is_valid(const char *url) _pure_;
495 // UNNEEDED bool http_etag_is_valid(const char *etag);
497 bool in_initrd(void);
499 int get_home_dir(char **ret);
500 // UNNEEDED int get_shell(char **_ret);
502 static inline void freep(void *p) {
506 static inline void closep(int *fd) {
510 static inline void umaskp(mode_t *u) {
514 static inline void close_pairp(int (*p)[2]) {
518 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
519 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
520 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
521 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
523 #define _cleanup_free_ _cleanup_(freep)
524 #define _cleanup_close_ _cleanup_(closep)
525 #define _cleanup_umask_ _cleanup_(umaskp)
526 #define _cleanup_globfree_ _cleanup_(globfree)
527 #define _cleanup_fclose_ _cleanup_(fclosep)
528 #define _cleanup_pclose_ _cleanup_(pclosep)
529 #define _cleanup_closedir_ _cleanup_(closedirp)
530 #define _cleanup_endmntent_ _cleanup_(endmntentp)
531 #define _cleanup_close_pair_ _cleanup_(close_pairp)
533 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
534 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
537 return malloc(a * b);
540 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
541 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
544 return realloc(p, a * b);
547 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
548 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
551 return memdup(p, a * b);
554 bool filename_is_valid(const char *p) _pure_;
555 bool path_is_safe(const char *p) _pure_;
556 bool string_is_safe(const char *p) _pure_;
557 bool string_has_cc(const char *p, const char *ok) _pure_;
560 * Check if a string contains any glob patterns.
562 _pure_ static inline bool string_is_glob(const char *p) {
563 return !!strpbrk(p, GLOB_CHARS);
566 // UNNEEDED void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
567 // UNNEEDED int (*compar) (const void *, const void *, void *),
568 // UNNEEDED void *arg);
570 #define _(String) gettext (String)
571 #define N_(String) String
572 // UNNEEDED void init_gettext(void);
573 bool is_locale_utf8(void);
575 typedef enum DrawSpecialChar {
580 DRAW_TRIANGULAR_BULLET,
584 _DRAW_SPECIAL_CHAR_MAX
587 const char *draw_special_char(DrawSpecialChar ch);
589 // UNNEEDED char *strreplace(const char *text, const char *old_string, const char *new_string);
591 // UNNEEDED char *strip_tab_ansi(char **p, size_t *l);
593 // UNNEEDED int on_ac_power(void);
595 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
596 // UNNEEDED int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
598 #define FOREACH_LINE(line, f, on_error) \
600 if (!fgets(line, sizeof(line), f)) { \
607 #define FOREACH_DIRENT(de, d, on_error) \
608 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
614 } else if (hidden_file((de)->d_name)) \
618 #define FOREACH_DIRENT_ALL(de, d, on_error) \
619 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
627 static inline void *mempset(void *s, int c, size_t n) {
629 return (uint8_t*)s + n;
632 char *hexmem(const void *p, size_t l);
633 int unhexmem(const char *p, size_t l, void **mem, size_t *len);
635 char *base32hexmem(const void *p, size_t l, bool padding);
636 int unbase32hexmem(const char *p, size_t l, bool padding, void **mem, size_t *len);
638 char *base64mem(const void *p, size_t l);
639 int unbase64mem(const char *p, size_t l, void **mem, size_t *len);
641 char *strextend(char **x, ...) _sentinel_;
642 char *strrep(const char *s, unsigned n);
644 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
645 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
646 #define GREEDY_REALLOC(array, allocated, need) \
647 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
649 #define GREEDY_REALLOC0(array, allocated, need) \
650 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
652 static inline void _reset_errno_(int *saved_errno) {
653 errno = *saved_errno;
656 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
658 static inline int negative_errno(void) {
659 /* This helper should be used to shut up gcc if you know 'errno' is
660 * negative. Instead of "return -errno;", use "return negative_errno();"
661 * It will suppress bogus gcc warnings in case it assumes 'errno' might
662 * be 0 and thus the caller's error-handling might not be triggered. */
663 assert_return(errno > 0, -EINVAL);
667 struct _umask_struct_ {
672 static inline void _reset_umask_(struct _umask_struct_ *s) {
676 #define RUN_WITH_UMASK(mask) \
677 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
678 !_saved_umask_.quit ; \
679 _saved_umask_.quit = true)
681 static inline unsigned u64log2(uint64_t n) {
682 #if __SIZEOF_LONG_LONG__ == 8
683 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
689 static inline unsigned u32ctz(uint32_t n) {
690 #if __SIZEOF_INT__ == 4
691 return __builtin_ctz(n);
697 static inline unsigned log2i(int x) {
700 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
703 static inline unsigned log2u(unsigned x) {
706 return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
709 static inline unsigned log2u_round_up(unsigned x) {
715 return log2u(x - 1) + 1;
718 static inline bool logind_running(void) {
719 return access("/run/systemd/seats/", F_OK) >= 0;
722 #define DECIMAL_STR_WIDTH(x) \
724 typeof(x) _x_ = (x); \
731 int unlink_noerrno(const char *path);
737 _new_ = alloca(_len_); \
738 (void *) memset(_new_, 0, _len_); \
741 /* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */
742 #define alloca_align(size, align) \
745 size_t _mask_ = (align) - 1; \
746 _ptr_ = alloca((size) + _mask_); \
747 (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \
750 #define alloca0_align(size, align) \
753 size_t _size_ = (size); \
754 _new_ = alloca_align(_size_, (align)); \
755 (void*)memset(_new_, 0, _size_); \
758 #define strjoina(a, ...) \
760 const char *_appendees_[] = { a, __VA_ARGS__ }; \
764 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
765 _len_ += strlen(_appendees_[_i_]); \
766 _p_ = _d_ = alloca(_len_ + 1); \
767 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
768 _p_ = stpcpy(_p_, _appendees_[_i_]); \
773 bool id128_is_valid(const char *s) _pure_;
775 // UNNEEDED int split_pair(const char *s, const char *sep, char **l, char **r);
777 // UNNEEDED int shall_restore_state(void);
780 * Normal qsort requires base to be nonnull. Here were require
781 * that only if nmemb > 0.
783 static inline void qsort_safe(void *base, size_t nmemb, size_t size, comparison_fn_t compar) {
788 qsort(base, nmemb, size, compar);
791 /* Normal memmem() requires haystack to be nonnull, which is annoying for zero-length buffers */
792 static inline void *memmem_safe(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen) {
795 return (void*) haystack;
797 if (haystacklen < needlelen)
803 return memmem(haystack, haystacklen, needle, needlelen);
806 int proc_cmdline(char **ret);
807 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
808 int get_proc_cmdline_key(const char *parameter, char **value);
810 int container_get_leader(const char *machine, pid_t *pid);
812 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd);
813 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd);
815 int getpeercred(int fd, struct ucred *ucred);
816 int getpeersec(int fd, char **ret);
818 int writev_safe(int fd, const struct iovec *w, int j);
820 int mkostemp_safe(char *pattern, int flags);
821 // UNNEEDED int open_tmpfile(const char *path, int flags);
823 int fd_warn_permissions(const char *path, int fd);
825 #ifndef PERSONALITY_INVALID
826 /* personality(7) documents that 0xffffffffUL is used for querying the
827 * current personality, hence let's use that here as error
829 #define PERSONALITY_INVALID 0xffffffffLU
832 // UNNEEDED unsigned long personality_from_string(const char *p);
833 // UNNEEDED const char *personality_to_string(unsigned long);
835 uint64_t physical_memory(void);
837 // UNNEEDED void hexdump(FILE *f, const void *p, size_t s);
839 union file_handle_union {
840 struct file_handle handle;
841 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
843 #define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ }
845 // UNNEEDED int update_reboot_param_file(const char *param);
847 // UNNEEDED int umount_recursive(const char *target, int flags);
849 // UNNEEDED int bind_remount_recursive(const char *prefix, bool ro);
851 int fflush_and_check(FILE *f);
853 int tempfn_xxxxxx(const char *p, const char *extra, char **ret);
854 int tempfn_random(const char *p, const char *extra, char **ret);
855 // UNNEEDED int tempfn_random_child(const char *p, const char *extra, char **ret);
857 // UNNEEDED int take_password_lock(const char *root);
859 // UNNEEDED int is_symlink(const char *path);
860 int is_dir(const char *path, bool follow);
861 // UNNEEDED int is_device_node(const char *path);
863 typedef enum ExtractFlags {
865 EXTRACT_CUNESCAPE = 2,
866 EXTRACT_CUNESCAPE_RELAX = 4,
868 EXTRACT_DONT_COALESCE_SEPARATORS = 16,
871 int extract_first_word(const char **p, char **ret, const char *separators, ExtractFlags flags);
872 // 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);
873 // UNNEEDED int extract_many_words(const char **p, const char *separators, ExtractFlags flags, ...) _sentinel_;
875 static inline void free_and_replace(char **s, char *v) {
880 int free_and_strdup(char **p, const char *s);
882 #define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1)
884 #define FOREACH_INOTIFY_EVENT(e, buffer, sz) \
885 for ((e) = &buffer.ev; \
886 (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \
887 (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len))
889 union inotify_event_buffer {
890 struct inotify_event ev;
891 uint8_t raw[INOTIFY_EVENT_MAX];
895 #define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW)
897 #define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), 0)
900 // UNNEEDED int ptsname_malloc(int fd, char **ret);
902 // UNNEEDED int openpt_in_namespace(pid_t pid, int flags);
904 ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags);
906 // UNNEEDED int fd_setcrtime(int fd, usec_t usec);
907 int fd_getcrtime(int fd, usec_t *usec);
908 // UNNEEDED int path_getcrtime(const char *p, usec_t *usec);
909 // UNNEEDED int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags);
911 // UNNEEDED int same_fd(int a, int b);
913 int chattr_fd(int fd, unsigned value, unsigned mask);
914 // UNNEEDED int chattr_path(const char *p, unsigned value, unsigned mask);
916 int read_attr_fd(int fd, unsigned *ret);
917 // UNNEEDED int read_attr_path(const char *p, unsigned *ret);
919 #define RLIMIT_MAKE_CONST(lim) ((struct rlimit) { lim, lim })
921 // UNNEEDED ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length);
923 void sigkill_wait(pid_t *pid);
924 #define _cleanup_sigkill_wait_ _cleanup_(sigkill_wait)
926 // UNNEEDED int syslog_parse_priority(const char **p, int *priority, bool with_facility);
928 // UNNEEDED void cmsg_close_all(struct msghdr *mh);
930 // UNNEEDED int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath);
932 // UNNEEDED char *shell_escape(const char *s, const char *bad);
933 // UNNEEDED char *shell_maybe_quote(const char *s);
935 int parse_mode(const char *s, mode_t *ret);
937 // UNNEEDED int mount_move_root(const char *path);
939 int reset_uid_gid(void);
941 int getxattr_malloc(const char *path, const char *name, char **value, bool allow_symlink);
942 int fgetxattr_malloc(int fd, const char *name, char **value);