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03467c88 | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
60918275 | 2 | |
c2f1db8f | 3 | #pragma once |
60918275 | 4 | |
a7334b09 LP |
5 | /*** |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2010 Lennart Poettering | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
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 | |
a7334b09 LP |
13 | (at your option) any later version. |
14 | ||
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 | |
5430f7f2 | 18 | Lesser General Public License for more details. |
a7334b09 | 19 | |
5430f7f2 | 20 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
22 | ***/ | |
23 | ||
31885cd5 | 24 | #include <alloca.h> |
370c860f | 25 | #include <fcntl.h> |
60918275 | 26 | #include <inttypes.h> |
f6c2284a LP |
27 | #include <limits.h> |
28 | #include <locale.h> | |
ec2002f8 | 29 | #include <stdarg.h> |
60918275 | 30 | #include <stdbool.h> |
f6c2284a | 31 | #include <stddef.h> |
80876c20 | 32 | #include <stdio.h> |
f6c2284a LP |
33 | #include <stdlib.h> |
34 | #include <sys/inotify.h> | |
2c35d880 | 35 | #include <sys/socket.h> |
00dc5d76 | 36 | #include <sys/stat.h> |
c6878637 | 37 | #include <sys/statfs.h> |
f6c2284a LP |
38 | #include <sys/types.h> |
39 | #include <time.h> | |
40 | #include <unistd.h> | |
60918275 | 41 | |
f6c2284a | 42 | #include "formats-util.h" |
a838e6a1 | 43 | #include "macro.h" |
dced1557 | 44 | #include "missing.h" |
9a98c7a1 | 45 | #include "time-util.h" |
871d7de4 | 46 | |
44d8db9e | 47 | /* What is interpreted as whitespace? */ |
4a72ff34 | 48 | #define WHITESPACE " \t\n\r" |
e3e0314b ZJS |
49 | #define NEWLINE "\n\r" |
50 | #define QUOTES "\"\'" | |
51 | #define COMMENTS "#;" | |
52 | #define GLOB_CHARS "*?[" | |
44d8db9e | 53 | |
2e857429 | 54 | size_t page_size(void) _pure_; |
37f85e66 | 55 | #define PAGE_ALIGN(l) ALIGN_TO((l), page_size()) |
56 | ||
4b8772bf | 57 | #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n))) |
60918275 LP |
58 | |
59 | #define new0(t, n) ((t*) calloc((n), sizeof(t))) | |
60 | ||
0f0dbc46 LP |
61 | #define newa(t, n) ((t*) alloca(sizeof(t)*(n))) |
62 | ||
7629889c LP |
63 | #define newa0(t, n) ((t*) alloca0(sizeof(t)*(n))) |
64 | ||
4b8772bf | 65 | #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n))) |
888c7102 | 66 | |
f80bb1f7 | 67 | #define malloc0(n) (calloc(1, (n))) |
60918275 | 68 | |
97b11eed DH |
69 | static inline void *mfree(void *memory) { |
70 | free(memory); | |
71 | return NULL; | |
72 | } | |
73 | ||
60918275 LP |
74 | static inline const char* yes_no(bool b) { |
75 | return b ? "yes" : "no"; | |
76 | } | |
77 | ||
5232c42e LS |
78 | static inline const char* true_false(bool b) { |
79 | return b ? "true" : "false"; | |
80 | } | |
81 | ||
769d324c LP |
82 | static inline const char* one_zero(bool b) { |
83 | return b ? "1" : "0"; | |
84 | } | |
85 | ||
42856c10 LP |
86 | bool fstype_is_network(const char *fstype); |
87 | ||
919ce0b7 | 88 | noreturn void freeze(void); |
3c14d26c | 89 | |
e801700e | 90 | void execute_directories(const char* const* directories, usec_t timeout, char *argv[]); |
83cc030f | 91 | |
a88c8750 TG |
92 | bool plymouth_running(void); |
93 | ||
44a6b1b6 | 94 | bool display_is_local(const char *display) _pure_; |
4d6d6518 LP |
95 | int socket_from_display(const char *display, char **path); |
96 | ||
94959f0f LP |
97 | int block_get_whole_disk(dev_t d, dev_t *ret); |
98 | ||
e23a0ce8 | 99 | #define NULSTR_FOREACH(i, l) \ |
c4e2ceae LP |
100 | for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1) |
101 | ||
5c0532d1 LP |
102 | #define NULSTR_FOREACH_PAIR(i, j, l) \ |
103 | for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i)) | |
104 | ||
f8b69d1d | 105 | int ioprio_class_to_string_alloc(int i, char **s); |
1dccbe19 LP |
106 | int ioprio_class_from_string(const char *s); |
107 | ||
44a6b1b6 ZJS |
108 | const char *sigchld_code_to_string(int i) _const_; |
109 | int sigchld_code_from_string(const char *s) _pure_; | |
1dccbe19 | 110 | |
f8b69d1d | 111 | int sched_policy_to_string_alloc(int i, char **s); |
1dccbe19 LP |
112 | int sched_policy_from_string(const char *s); |
113 | ||
9a0e6896 LP |
114 | extern int saved_argc; |
115 | extern char **saved_argv; | |
116 | ||
65457142 FC |
117 | bool kexec_loaded(void); |
118 | ||
44a6b1b6 | 119 | int prot_from_flags(int flags) _const_; |
87d2c1ff | 120 | |
750ef272 | 121 | void* memdup(const void *p, size_t l) _alloc_(2); |
55d7bfc1 | 122 | |
9bdc770c | 123 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...); |
6bb92a16 | 124 | |
9be346c9 | 125 | bool in_initrd(void); |
069cfc85 | 126 | |
a740c14c MS |
127 | static inline void freep(void *p) { |
128 | free(*(void**) p); | |
129 | } | |
130 | ||
dfb33a97 | 131 | #define _cleanup_free_ _cleanup_(freep) |
c84a9488 | 132 | |
750ef272 | 133 | _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) { |
368504f4 | 134 | if (_unlikely_(b != 0 && a > ((size_t) -1) / b)) |
4b8772bf LP |
135 | return NULL; |
136 | ||
137 | return malloc(a * b); | |
138 | } | |
139 | ||
9489490a DH |
140 | _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) { |
141 | if (_unlikely_(b != 0 && a > ((size_t) -1) / b)) | |
142 | return NULL; | |
143 | ||
144 | return realloc(p, a * b); | |
145 | } | |
146 | ||
750ef272 | 147 | _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) { |
368504f4 | 148 | if (_unlikely_(b != 0 && a > ((size_t) -1) / b)) |
4b8772bf LP |
149 | return NULL; |
150 | ||
151 | return memdup(p, a * b); | |
152 | } | |
0b507b17 | 153 | |
a9e12476 KS |
154 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, |
155 | int (*compar) (const void *, const void *, void *), | |
156 | void *arg); | |
09017585 | 157 | |
240dbaa4 | 158 | int on_ac_power(void); |
f74e605f | 159 | |
6282c859 MS |
160 | static inline void *mempset(void *s, int c, size_t n) { |
161 | memset(s, c, n); | |
dfb33a97 | 162 | return (uint8_t*)s + n; |
6282c859 | 163 | } |
66e35261 | 164 | |
7d50b32a LP |
165 | #define memzero(x,l) (memset((x), 0, (l))) |
166 | #define zero(x) (memzero(&(x), sizeof(x))) | |
167 | ||
ca2d3784 ZJS |
168 | void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size); |
169 | void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size); | |
170 | #define GREEDY_REALLOC(array, allocated, need) \ | |
171 | greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0])) | |
172 | ||
173 | #define GREEDY_REALLOC0(array, allocated, need) \ | |
174 | greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0])) | |
a1937e67 | 175 | |
5c0d398d | 176 | static inline void _reset_errno_(int *saved_errno) { |
5c0aa72a LP |
177 | errno = *saved_errno; |
178 | } | |
179 | ||
2a371001 | 180 | #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno |
5c0d398d | 181 | |
44dd2c6e DH |
182 | static inline int negative_errno(void) { |
183 | /* This helper should be used to shut up gcc if you know 'errno' is | |
184 | * negative. Instead of "return -errno;", use "return negative_errno();" | |
185 | * It will suppress bogus gcc warnings in case it assumes 'errno' might | |
186 | * be 0 and thus the caller's error-handling might not be triggered. */ | |
187 | assert_return(errno > 0, -EINVAL); | |
188 | return -errno; | |
189 | } | |
190 | ||
144e51ec | 191 | static inline unsigned u64log2(uint64_t n) { |
ec417ccc | 192 | #if __SIZEOF_LONG_LONG__ == 8 |
693eb9a2 | 193 | return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0; |
ec417ccc LP |
194 | #else |
195 | #error "Wut?" | |
196 | #endif | |
197 | } | |
198 | ||
199 | static inline unsigned u32ctz(uint32_t n) { | |
200 | #if __SIZEOF_INT__ == 4 | |
201 | return __builtin_ctz(n); | |
202 | #else | |
203 | #error "Wut?" | |
204 | #endif | |
144e51ec | 205 | } |
79d860fe | 206 | |
7d328b54 | 207 | static inline unsigned log2i(int x) { |
8fe90522 ZJS |
208 | assert(x > 0); |
209 | ||
210 | return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1; | |
211 | } | |
212 | ||
b5de6d98 MS |
213 | static inline unsigned log2u(unsigned x) { |
214 | assert(x > 0); | |
215 | ||
216 | return sizeof(unsigned) * 8 - __builtin_clz(x) - 1; | |
217 | } | |
218 | ||
219 | static inline unsigned log2u_round_up(unsigned x) { | |
220 | assert(x > 0); | |
221 | ||
222 | if (x == 1) | |
223 | return 0; | |
224 | ||
225 | return log2u(x - 1) + 1; | |
226 | } | |
227 | ||
82da66fb LP |
228 | #define alloca0(n) \ |
229 | ({ \ | |
230 | char *_new_; \ | |
231 | size_t _len_ = n; \ | |
232 | _new_ = alloca(_len_); \ | |
233 | (void *) memset(_new_, 0, _len_); \ | |
ed5c5dbd | 234 | }) |
95d78c7e | 235 | |
257224b0 | 236 | /* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */ |
95d78c7e DH |
237 | #define alloca_align(size, align) \ |
238 | ({ \ | |
239 | void *_ptr_; \ | |
240 | size_t _mask_ = (align) - 1; \ | |
241 | _ptr_ = alloca((size) + _mask_); \ | |
242 | (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \ | |
243 | }) | |
244 | ||
245 | #define alloca0_align(size, align) \ | |
246 | ({ \ | |
247 | void *_new_; \ | |
248 | size_t _size_ = (size); \ | |
249 | _new_ = alloca_align(_size_, (align)); \ | |
250 | (void*)memset(_new_, 0, _size_); \ | |
251 | }) | |
66060897 | 252 | |
44a6b1b6 | 253 | bool id128_is_valid(const char *s) _pure_; |
d4ac85c6 | 254 | |
7ff7394d ZJS |
255 | /** |
256 | * Normal qsort requires base to be nonnull. Here were require | |
257 | * that only if nmemb > 0. | |
258 | */ | |
aeb24f30 | 259 | static inline void qsort_safe(void *base, size_t nmemb, size_t size, comparison_fn_t compar) { |
1dbd13d8 | 260 | if (nmemb <= 1) |
aeb24f30 LP |
261 | return; |
262 | ||
263 | assert(base); | |
264 | qsort(base, nmemb, size, compar); | |
7ff7394d | 265 | } |
74df0fca | 266 | |
bc9fd78c LP |
267 | int container_get_leader(const char *machine, pid_t *pid); |
268 | ||
671c3419 RM |
269 | int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd); |
270 | int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd); | |
bf108e55 | 271 | |
050f7277 LP |
272 | #ifndef PERSONALITY_INVALID |
273 | /* personality(7) documents that 0xffffffffUL is used for querying the | |
274 | * current personality, hence let's use that here as error | |
275 | * indicator. */ | |
276 | #define PERSONALITY_INVALID 0xffffffffLU | |
277 | #endif | |
278 | ||
ac45f971 LP |
279 | unsigned long personality_from_string(const char *p); |
280 | const char *personality_to_string(unsigned long); | |
1c231f56 LP |
281 | |
282 | uint64_t physical_memory(void); | |
6db615c1 | 283 | |
370c860f | 284 | union file_handle_union { |
c5220a94 MO |
285 | struct file_handle handle; |
286 | char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ]; | |
370c860f | 287 | }; |
2695c5c4 | 288 | #define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ } |
c5220a94 MO |
289 | |
290 | int update_reboot_param_file(const char *param); | |
6d313367 | 291 | |
f7c1ad4f LP |
292 | #define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1) |
293 | ||
294 | #define FOREACH_INOTIFY_EVENT(e, buffer, sz) \ | |
0254e944 SL |
295 | for ((e) = &buffer.ev; \ |
296 | (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \ | |
f7c1ad4f | 297 | (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len)) |
72648326 | 298 | |
0254e944 SL |
299 | union inotify_event_buffer { |
300 | struct inotify_event ev; | |
301 | uint8_t raw[INOTIFY_EVENT_MAX]; | |
302 | }; | |
303 | ||
3f6fd1ba | 304 | int version(void); |
8dd4c05b LP |
305 | |
306 | bool fdname_is_valid(const char *s); | |
257b0719 EV |
307 | |
308 | bool oom_score_adjust_is_valid(int oa); |