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Commit | Line | Data |
---|---|---|
53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a5c32cff | 2 | |
11c3a366 TA |
3 | #include <errno.h> |
4 | #include <fcntl.h> | |
5 | #include <limits.h> | |
6 | #include <stdarg.h> | |
7 | #include <stdint.h> | |
35bbbf85 | 8 | #include <stdio_ext.h> |
11c3a366 TA |
9 | #include <stdlib.h> |
10 | #include <string.h> | |
7accca23 | 11 | #include <sys/mman.h> |
11c3a366 TA |
12 | #include <sys/stat.h> |
13 | #include <sys/types.h> | |
a5c32cff | 14 | #include <unistd.h> |
cda134ab | 15 | |
b5efdb8a | 16 | #include "alloc-util.h" |
4f5dd394 | 17 | #include "ctype.h" |
f4b51a2d | 18 | #include "def.h" |
99003e01 | 19 | #include "env-util.h" |
4f5dd394 | 20 | #include "escape.h" |
3ffd4af2 LP |
21 | #include "fd-util.h" |
22 | #include "fileio.h" | |
f4f15635 | 23 | #include "fs-util.h" |
0d39fa9c | 24 | #include "hexdecoct.h" |
93cc7779 TA |
25 | #include "log.h" |
26 | #include "macro.h" | |
1d9ed171 | 27 | #include "missing.h" |
33d52ab9 | 28 | #include "parse-util.h" |
0d39fa9c | 29 | #include "path-util.h" |
df0ff127 | 30 | #include "process-util.h" |
0d39fa9c | 31 | #include "random-util.h" |
33d52ab9 | 32 | #include "stdio-util.h" |
07630cea | 33 | #include "string-util.h" |
a5c32cff | 34 | #include "strv.h" |
93cc7779 | 35 | #include "time-util.h" |
affb60b1 | 36 | #include "umask-util.h" |
335c46b5 | 37 | #include "utf8.h" |
a5c32cff | 38 | |
c2d11a63 VC |
39 | #define READ_FULL_BYTES_MAX (4U*1024U*1024U) |
40 | ||
b1837133 LP |
41 | int write_string_stream_ts( |
42 | FILE *f, | |
43 | const char *line, | |
44 | WriteStringFileFlags flags, | |
45 | struct timespec *ts) { | |
dacd6cee | 46 | |
91dc2bf7 | 47 | bool needs_nl; |
be83711c | 48 | int r; |
91dc2bf7 | 49 | |
717603e3 LP |
50 | assert(f); |
51 | assert(line); | |
52 | ||
ba8b8c9e MG |
53 | if (ferror(f)) |
54 | return -EIO; | |
55 | ||
91dc2bf7 LP |
56 | needs_nl = !(flags & WRITE_STRING_FILE_AVOID_NEWLINE) && !endswith(line, "\n"); |
57 | ||
58 | if (needs_nl && (flags & WRITE_STRING_FILE_DISABLE_BUFFER)) { | |
59 | /* If STDIO buffering was disabled, then let's append the newline character to the string itself, so | |
60 | * that the write goes out in one go, instead of two */ | |
61 | ||
62 | line = strjoina(line, "\n"); | |
63 | needs_nl = false; | |
64 | } | |
65 | ||
94d3b60f MG |
66 | if (fputs(line, f) == EOF) |
67 | return -errno; | |
68 | ||
91dc2bf7 | 69 | if (needs_nl) |
94d3b60f MG |
70 | if (fputc('\n', f) == EOF) |
71 | return -errno; | |
a5c32cff | 72 | |
be83711c CL |
73 | if (flags & WRITE_STRING_FILE_SYNC) |
74 | r = fflush_sync_and_check(f); | |
75 | else | |
76 | r = fflush_and_check(f); | |
77 | if (r < 0) | |
78 | return r; | |
79 | ||
39c38d77 ZJS |
80 | if (ts) { |
81 | struct timespec twice[2] = {*ts, *ts}; | |
82 | ||
83 | if (futimens(fileno(f), twice) < 0) | |
84 | return -errno; | |
85 | } | |
86 | ||
be83711c | 87 | return 0; |
a5c32cff HH |
88 | } |
89 | ||
2eabcc77 LP |
90 | static int write_string_file_atomic( |
91 | const char *fn, | |
92 | const char *line, | |
b1837133 | 93 | WriteStringFileFlags flags, |
2eabcc77 LP |
94 | struct timespec *ts) { |
95 | ||
a5c32cff HH |
96 | _cleanup_fclose_ FILE *f = NULL; |
97 | _cleanup_free_ char *p = NULL; | |
98 | int r; | |
99 | ||
100 | assert(fn); | |
101 | assert(line); | |
102 | ||
103 | r = fopen_temporary(fn, &f, &p); | |
104 | if (r < 0) | |
105 | return r; | |
106 | ||
35bbbf85 | 107 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); |
0d39fa9c | 108 | (void) fchmod_umask(fileno(f), 0644); |
a5c32cff | 109 | |
b1837133 | 110 | r = write_string_stream_ts(f, line, flags, ts); |
9dd1b1e8 LP |
111 | if (r < 0) |
112 | goto fail; | |
113 | ||
114 | if (rename(p, fn) < 0) { | |
115 | r = -errno; | |
116 | goto fail; | |
a5c32cff HH |
117 | } |
118 | ||
9dd1b1e8 | 119 | return 0; |
a5c32cff | 120 | |
9dd1b1e8 LP |
121 | fail: |
122 | (void) unlink(p); | |
a5c32cff HH |
123 | return r; |
124 | } | |
125 | ||
b1837133 LP |
126 | int write_string_file_ts( |
127 | const char *fn, | |
128 | const char *line, | |
129 | WriteStringFileFlags flags, | |
130 | struct timespec *ts) { | |
131 | ||
4c1fc3e4 | 132 | _cleanup_fclose_ FILE *f = NULL; |
eb3da901 | 133 | int q, r; |
4c1fc3e4 DM |
134 | |
135 | assert(fn); | |
136 | assert(line); | |
137 | ||
265710c2 AJ |
138 | /* We don't know how to verify whether the file contents was already on-disk. */ |
139 | assert(!((flags & WRITE_STRING_FILE_VERIFY_ON_FAILURE) && (flags & WRITE_STRING_FILE_SYNC))); | |
0675e94a | 140 | |
4c1fc3e4 DM |
141 | if (flags & WRITE_STRING_FILE_ATOMIC) { |
142 | assert(flags & WRITE_STRING_FILE_CREATE); | |
143 | ||
b1837133 | 144 | r = write_string_file_atomic(fn, line, flags, ts); |
eb3da901 LP |
145 | if (r < 0) |
146 | goto fail; | |
147 | ||
148 | return r; | |
39c38d77 | 149 | } else |
234519ae | 150 | assert(!ts); |
4c1fc3e4 DM |
151 | |
152 | if (flags & WRITE_STRING_FILE_CREATE) { | |
153 | f = fopen(fn, "we"); | |
eb3da901 LP |
154 | if (!f) { |
155 | r = -errno; | |
156 | goto fail; | |
157 | } | |
4c1fc3e4 DM |
158 | } else { |
159 | int fd; | |
160 | ||
161 | /* We manually build our own version of fopen(..., "we") that | |
162 | * works without O_CREAT */ | |
163 | fd = open(fn, O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
eb3da901 LP |
164 | if (fd < 0) { |
165 | r = -errno; | |
166 | goto fail; | |
167 | } | |
4c1fc3e4 DM |
168 | |
169 | f = fdopen(fd, "we"); | |
170 | if (!f) { | |
eb3da901 | 171 | r = -errno; |
4c1fc3e4 | 172 | safe_close(fd); |
eb3da901 | 173 | goto fail; |
4c1fc3e4 DM |
174 | } |
175 | } | |
176 | ||
35bbbf85 LP |
177 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); |
178 | ||
12ec9c30 TSH |
179 | if (flags & WRITE_STRING_FILE_DISABLE_BUFFER) |
180 | setvbuf(f, NULL, _IONBF, 0); | |
181 | ||
b1837133 | 182 | r = write_string_stream_ts(f, line, flags, ts); |
eb3da901 LP |
183 | if (r < 0) |
184 | goto fail; | |
185 | ||
186 | return 0; | |
187 | ||
188 | fail: | |
189 | if (!(flags & WRITE_STRING_FILE_VERIFY_ON_FAILURE)) | |
190 | return r; | |
191 | ||
192 | f = safe_fclose(f); | |
193 | ||
194 | /* OK, the operation failed, but let's see if the right | |
195 | * contents in place already. If so, eat up the error. */ | |
196 | ||
197 | q = verify_file(fn, line, !(flags & WRITE_STRING_FILE_AVOID_NEWLINE)); | |
198 | if (q <= 0) | |
199 | return r; | |
200 | ||
201 | return 0; | |
4c1fc3e4 DM |
202 | } |
203 | ||
3130fca5 LP |
204 | int write_string_filef( |
205 | const char *fn, | |
206 | WriteStringFileFlags flags, | |
207 | const char *format, ...) { | |
208 | ||
209 | _cleanup_free_ char *p = NULL; | |
210 | va_list ap; | |
211 | int r; | |
212 | ||
213 | va_start(ap, format); | |
214 | r = vasprintf(&p, format, ap); | |
215 | va_end(ap); | |
216 | ||
217 | if (r < 0) | |
218 | return -ENOMEM; | |
219 | ||
220 | return write_string_file(fn, p, flags); | |
221 | } | |
222 | ||
a5c32cff HH |
223 | int read_one_line_file(const char *fn, char **line) { |
224 | _cleanup_fclose_ FILE *f = NULL; | |
2e33df93 | 225 | int r; |
a5c32cff HH |
226 | |
227 | assert(fn); | |
228 | assert(line); | |
229 | ||
230 | f = fopen(fn, "re"); | |
231 | if (!f) | |
232 | return -errno; | |
233 | ||
35bbbf85 LP |
234 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); |
235 | ||
2e33df93 ZJS |
236 | r = read_line(f, LONG_LINE_MAX, line); |
237 | return r < 0 ? r : 0; | |
a5c32cff HH |
238 | } |
239 | ||
eb3da901 LP |
240 | int verify_file(const char *fn, const char *blob, bool accept_extra_nl) { |
241 | _cleanup_fclose_ FILE *f = NULL; | |
242 | _cleanup_free_ char *buf = NULL; | |
243 | size_t l, k; | |
15dee3f0 | 244 | |
eb3da901 LP |
245 | assert(fn); |
246 | assert(blob); | |
247 | ||
248 | l = strlen(blob); | |
249 | ||
250 | if (accept_extra_nl && endswith(blob, "\n")) | |
251 | accept_extra_nl = false; | |
252 | ||
253 | buf = malloc(l + accept_extra_nl + 1); | |
254 | if (!buf) | |
255 | return -ENOMEM; | |
256 | ||
257 | f = fopen(fn, "re"); | |
258 | if (!f) | |
259 | return -errno; | |
260 | ||
35bbbf85 LP |
261 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); |
262 | ||
eb3da901 LP |
263 | /* We try to read one byte more than we need, so that we know whether we hit eof */ |
264 | errno = 0; | |
265 | k = fread(buf, 1, l + accept_extra_nl + 1, f); | |
266 | if (ferror(f)) | |
267 | return errno > 0 ? -errno : -EIO; | |
268 | ||
269 | if (k != l && k != l + accept_extra_nl) | |
270 | return 0; | |
271 | if (memcmp(buf, blob, l) != 0) | |
272 | return 0; | |
273 | if (k > l && buf[l] != '\n') | |
274 | return 0; | |
15dee3f0 | 275 | |
eb3da901 | 276 | return 1; |
15dee3f0 LP |
277 | } |
278 | ||
717603e3 | 279 | int read_full_stream(FILE *f, char **contents, size_t *size) { |
a5c32cff HH |
280 | _cleanup_free_ char *buf = NULL; |
281 | struct stat st; | |
c4054ddf LP |
282 | size_t n, l; |
283 | int fd; | |
a5c32cff | 284 | |
717603e3 | 285 | assert(f); |
a5c32cff HH |
286 | assert(contents); |
287 | ||
717603e3 | 288 | n = LINE_MAX; |
a5c32cff | 289 | |
c4054ddf LP |
290 | fd = fileno(f); |
291 | if (fd >= 0) { /* If the FILE* object is backed by an fd (as opposed to memory or such, see fmemopen(), let's | |
292 | * optimize our buffering) */ | |
717603e3 | 293 | |
c4054ddf LP |
294 | if (fstat(fileno(f), &st) < 0) |
295 | return -errno; | |
296 | ||
297 | if (S_ISREG(st.st_mode)) { | |
717603e3 | 298 | |
c4054ddf LP |
299 | /* Safety check */ |
300 | if (st.st_size > READ_FULL_BYTES_MAX) | |
301 | return -E2BIG; | |
302 | ||
303 | /* Start with the right file size, but be prepared for files from /proc which generally report a file | |
304 | * size of 0. Note that we increase the size to read here by one, so that the first read attempt | |
305 | * already makes us notice the EOF. */ | |
306 | if (st.st_size > 0) | |
307 | n = st.st_size + 1; | |
308 | } | |
717603e3 | 309 | } |
a5c32cff | 310 | |
717603e3 | 311 | l = 0; |
a5c32cff HH |
312 | for (;;) { |
313 | char *t; | |
314 | size_t k; | |
315 | ||
c2d11a63 | 316 | t = realloc(buf, n + 1); |
a5c32cff HH |
317 | if (!t) |
318 | return -ENOMEM; | |
319 | ||
320 | buf = t; | |
5a89faf0 | 321 | errno = 0; |
a5c32cff | 322 | k = fread(buf + l, 1, n - l, f); |
c2d11a63 VC |
323 | if (k > 0) |
324 | l += k; | |
a5c32cff | 325 | |
c2d11a63 | 326 | if (ferror(f)) |
5a89faf0 | 327 | return errno > 0 ? -errno : -EIO; |
a5c32cff | 328 | |
c2d11a63 | 329 | if (feof(f)) |
a5c32cff | 330 | break; |
a5c32cff | 331 | |
c2d11a63 VC |
332 | /* We aren't expecting fread() to return a short read outside |
333 | * of (error && eof), assert buffer is full and enlarge buffer. | |
334 | */ | |
335 | assert(l == n); | |
a5c32cff HH |
336 | |
337 | /* Safety check */ | |
c2d11a63 | 338 | if (n >= READ_FULL_BYTES_MAX) |
a5c32cff | 339 | return -E2BIG; |
c2d11a63 | 340 | |
82b103a7 | 341 | n = MIN(n * 2, READ_FULL_BYTES_MAX); |
a5c32cff HH |
342 | } |
343 | ||
344 | buf[l] = 0; | |
ae2a15bc | 345 | *contents = TAKE_PTR(buf); |
a5c32cff HH |
346 | |
347 | if (size) | |
348 | *size = l; | |
349 | ||
350 | return 0; | |
351 | } | |
352 | ||
717603e3 LP |
353 | int read_full_file(const char *fn, char **contents, size_t *size) { |
354 | _cleanup_fclose_ FILE *f = NULL; | |
355 | ||
356 | assert(fn); | |
357 | assert(contents); | |
358 | ||
359 | f = fopen(fn, "re"); | |
360 | if (!f) | |
361 | return -errno; | |
362 | ||
35bbbf85 LP |
363 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); |
364 | ||
717603e3 LP |
365 | return read_full_stream(f, contents, size); |
366 | } | |
367 | ||
f73141d7 | 368 | static int parse_env_file_internal( |
717603e3 | 369 | FILE *f, |
a5c32cff | 370 | const char *fname, |
f73141d7 | 371 | const char *newline, |
335c46b5 | 372 | int (*push) (const char *filename, unsigned line, |
a5f6c30d MS |
373 | const char *key, char *value, void *userdata, int *n_pushed), |
374 | void *userdata, | |
375 | int *n_pushed) { | |
f73141d7 | 376 | |
2b77f67e | 377 | size_t key_alloc = 0, n_key = 0, value_alloc = 0, n_value = 0, last_value_whitespace = (size_t) -1, last_key_whitespace = (size_t) -1; |
d56fced9 | 378 | _cleanup_free_ char *contents = NULL, *key = NULL, *value = NULL; |
335c46b5 | 379 | unsigned line = 1; |
d56fced9 LP |
380 | char *p; |
381 | int r; | |
a5c32cff | 382 | |
f73141d7 LP |
383 | enum { |
384 | PRE_KEY, | |
385 | KEY, | |
f73141d7 LP |
386 | PRE_VALUE, |
387 | VALUE, | |
388 | VALUE_ESCAPE, | |
389 | SINGLE_QUOTE_VALUE, | |
390 | SINGLE_QUOTE_VALUE_ESCAPE, | |
391 | DOUBLE_QUOTE_VALUE, | |
392 | DOUBLE_QUOTE_VALUE_ESCAPE, | |
393 | COMMENT, | |
394 | COMMENT_ESCAPE | |
395 | } state = PRE_KEY; | |
a5c32cff | 396 | |
f73141d7 | 397 | assert(newline); |
a5c32cff | 398 | |
717603e3 LP |
399 | if (f) |
400 | r = read_full_stream(f, &contents, NULL); | |
401 | else | |
402 | r = read_full_file(fname, &contents, NULL); | |
1c17cbed | 403 | if (r < 0) |
a5c32cff HH |
404 | return r; |
405 | ||
f73141d7 LP |
406 | for (p = contents; *p; p++) { |
407 | char c = *p; | |
408 | ||
409 | switch (state) { | |
410 | ||
411 | case PRE_KEY: | |
ebc05a09 | 412 | if (strchr(COMMENTS, c)) |
f73141d7 LP |
413 | state = COMMENT; |
414 | else if (!strchr(WHITESPACE, c)) { | |
415 | state = KEY; | |
2b77f67e LP |
416 | last_key_whitespace = (size_t) -1; |
417 | ||
d56fced9 LP |
418 | if (!GREEDY_REALLOC(key, key_alloc, n_key+2)) |
419 | return -ENOMEM; | |
f73141d7 LP |
420 | |
421 | key[n_key++] = c; | |
422 | } | |
423 | break; | |
424 | ||
425 | case KEY: | |
426 | if (strchr(newline, c)) { | |
427 | state = PRE_KEY; | |
313cefa1 | 428 | line++; |
f73141d7 | 429 | n_key = 0; |
2b77f67e | 430 | } else if (c == '=') { |
f73141d7 | 431 | state = PRE_VALUE; |
2b77f67e LP |
432 | last_value_whitespace = (size_t) -1; |
433 | } else { | |
434 | if (!strchr(WHITESPACE, c)) | |
435 | last_key_whitespace = (size_t) -1; | |
436 | else if (last_key_whitespace == (size_t) -1) | |
437 | last_key_whitespace = n_key; | |
438 | ||
d56fced9 LP |
439 | if (!GREEDY_REALLOC(key, key_alloc, n_key+2)) |
440 | return -ENOMEM; | |
f73141d7 LP |
441 | |
442 | key[n_key++] = c; | |
443 | } | |
a5c32cff | 444 | |
f73141d7 LP |
445 | break; |
446 | ||
f73141d7 | 447 | case PRE_VALUE: |
98f59e59 | 448 | if (strchr(newline, c)) { |
f73141d7 | 449 | state = PRE_KEY; |
313cefa1 | 450 | line++; |
f73141d7 | 451 | key[n_key] = 0; |
a5c32cff | 452 | |
f73141d7 LP |
453 | if (value) |
454 | value[n_value] = 0; | |
a5c32cff | 455 | |
ebc05a09 | 456 | /* strip trailing whitespace from key */ |
2b77f67e LP |
457 | if (last_key_whitespace != (size_t) -1) |
458 | key[last_key_whitespace] = 0; | |
ebc05a09 | 459 | |
a5f6c30d | 460 | r = push(fname, line, key, value, userdata, n_pushed); |
f73141d7 | 461 | if (r < 0) |
d56fced9 | 462 | return r; |
f73141d7 LP |
463 | |
464 | n_key = 0; | |
465 | value = NULL; | |
466 | value_alloc = n_value = 0; | |
2b77f67e | 467 | |
f73141d7 LP |
468 | } else if (c == '\'') |
469 | state = SINGLE_QUOTE_VALUE; | |
470 | else if (c == '\"') | |
471 | state = DOUBLE_QUOTE_VALUE; | |
472 | else if (c == '\\') | |
473 | state = VALUE_ESCAPE; | |
474 | else if (!strchr(WHITESPACE, c)) { | |
475 | state = VALUE; | |
476 | ||
d56fced9 LP |
477 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) |
478 | return -ENOMEM; | |
f73141d7 LP |
479 | |
480 | value[n_value++] = c; | |
481 | } | |
482 | ||
483 | break; | |
484 | ||
485 | case VALUE: | |
486 | if (strchr(newline, c)) { | |
487 | state = PRE_KEY; | |
313cefa1 | 488 | line++; |
98f59e59 | 489 | |
f73141d7 LP |
490 | key[n_key] = 0; |
491 | ||
492 | if (value) | |
493 | value[n_value] = 0; | |
494 | ||
2b77f67e LP |
495 | /* Chomp off trailing whitespace from value */ |
496 | if (last_value_whitespace != (size_t) -1) | |
497 | value[last_value_whitespace] = 0; | |
f73141d7 | 498 | |
ebc05a09 | 499 | /* strip trailing whitespace from key */ |
2b77f67e LP |
500 | if (last_key_whitespace != (size_t) -1) |
501 | key[last_key_whitespace] = 0; | |
ebc05a09 | 502 | |
a5f6c30d | 503 | r = push(fname, line, key, value, userdata, n_pushed); |
f73141d7 | 504 | if (r < 0) |
d56fced9 | 505 | return r; |
f73141d7 LP |
506 | |
507 | n_key = 0; | |
508 | value = NULL; | |
509 | value_alloc = n_value = 0; | |
2b77f67e | 510 | |
f73141d7 LP |
511 | } else if (c == '\\') { |
512 | state = VALUE_ESCAPE; | |
2b77f67e | 513 | last_value_whitespace = (size_t) -1; |
f73141d7 LP |
514 | } else { |
515 | if (!strchr(WHITESPACE, c)) | |
2b77f67e LP |
516 | last_value_whitespace = (size_t) -1; |
517 | else if (last_value_whitespace == (size_t) -1) | |
518 | last_value_whitespace = n_value; | |
f73141d7 | 519 | |
d56fced9 LP |
520 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) |
521 | return -ENOMEM; | |
f73141d7 LP |
522 | |
523 | value[n_value++] = c; | |
524 | } | |
525 | ||
526 | break; | |
527 | ||
528 | case VALUE_ESCAPE: | |
529 | state = VALUE; | |
530 | ||
531 | if (!strchr(newline, c)) { | |
532 | /* Escaped newlines we eat up entirely */ | |
d56fced9 LP |
533 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) |
534 | return -ENOMEM; | |
f73141d7 LP |
535 | |
536 | value[n_value++] = c; | |
537 | } | |
538 | break; | |
539 | ||
540 | case SINGLE_QUOTE_VALUE: | |
541 | if (c == '\'') | |
542 | state = PRE_VALUE; | |
543 | else if (c == '\\') | |
544 | state = SINGLE_QUOTE_VALUE_ESCAPE; | |
545 | else { | |
d56fced9 LP |
546 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) |
547 | return -ENOMEM; | |
a5c32cff | 548 | |
f73141d7 LP |
549 | value[n_value++] = c; |
550 | } | |
a5c32cff | 551 | |
f73141d7 | 552 | break; |
a5c32cff | 553 | |
f73141d7 LP |
554 | case SINGLE_QUOTE_VALUE_ESCAPE: |
555 | state = SINGLE_QUOTE_VALUE; | |
a5c32cff | 556 | |
f73141d7 | 557 | if (!strchr(newline, c)) { |
d56fced9 LP |
558 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) |
559 | return -ENOMEM; | |
a5c32cff | 560 | |
f73141d7 LP |
561 | value[n_value++] = c; |
562 | } | |
563 | break; | |
564 | ||
565 | case DOUBLE_QUOTE_VALUE: | |
566 | if (c == '\"') | |
567 | state = PRE_VALUE; | |
568 | else if (c == '\\') | |
569 | state = DOUBLE_QUOTE_VALUE_ESCAPE; | |
570 | else { | |
d56fced9 LP |
571 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) |
572 | return -ENOMEM; | |
a5c32cff | 573 | |
f73141d7 LP |
574 | value[n_value++] = c; |
575 | } | |
576 | ||
577 | break; | |
578 | ||
579 | case DOUBLE_QUOTE_VALUE_ESCAPE: | |
580 | state = DOUBLE_QUOTE_VALUE; | |
a5c32cff | 581 | |
f73141d7 | 582 | if (!strchr(newline, c)) { |
d56fced9 LP |
583 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) |
584 | return -ENOMEM; | |
a5c32cff | 585 | |
f73141d7 | 586 | value[n_value++] = c; |
a5c32cff | 587 | } |
f73141d7 LP |
588 | break; |
589 | ||
590 | case COMMENT: | |
591 | if (c == '\\') | |
592 | state = COMMENT_ESCAPE; | |
335c46b5 | 593 | else if (strchr(newline, c)) { |
f73141d7 | 594 | state = PRE_KEY; |
313cefa1 | 595 | line++; |
335c46b5 | 596 | } |
f73141d7 LP |
597 | break; |
598 | ||
599 | case COMMENT_ESCAPE: | |
600 | state = COMMENT; | |
601 | break; | |
a5c32cff | 602 | } |
f73141d7 LP |
603 | } |
604 | ||
371328dc ZJS |
605 | if (IN_SET(state, |
606 | PRE_VALUE, | |
607 | VALUE, | |
608 | VALUE_ESCAPE, | |
609 | SINGLE_QUOTE_VALUE, | |
610 | SINGLE_QUOTE_VALUE_ESCAPE, | |
611 | DOUBLE_QUOTE_VALUE, | |
612 | DOUBLE_QUOTE_VALUE_ESCAPE)) { | |
a5c32cff | 613 | |
f73141d7 LP |
614 | key[n_key] = 0; |
615 | ||
616 | if (value) | |
617 | value[n_value] = 0; | |
618 | ||
2b77f67e LP |
619 | if (state == VALUE) |
620 | if (last_value_whitespace != (size_t) -1) | |
621 | value[last_value_whitespace] = 0; | |
622 | ||
ebc05a09 | 623 | /* strip trailing whitespace from key */ |
2b77f67e LP |
624 | if (last_key_whitespace != (size_t) -1) |
625 | key[last_key_whitespace] = 0; | |
ebc05a09 | 626 | |
a5f6c30d | 627 | r = push(fname, line, key, value, userdata, n_pushed); |
f73141d7 | 628 | if (r < 0) |
d56fced9 LP |
629 | return r; |
630 | ||
631 | value = NULL; | |
a5c32cff HH |
632 | } |
633 | ||
f73141d7 | 634 | return 0; |
a5c32cff HH |
635 | } |
636 | ||
ac466818 | 637 | static int check_utf8ness_and_warn( |
717603e3 | 638 | const char *filename, unsigned line, |
ac466818 | 639 | const char *key, char *value) { |
f27f0e21 GB |
640 | |
641 | if (!utf8_is_valid(key)) { | |
3587161a | 642 | _cleanup_free_ char *p = NULL; |
550a40ec | 643 | |
717603e3 LP |
644 | p = utf8_escape_invalid(key); |
645 | log_error("%s:%u: invalid UTF-8 in key '%s', ignoring.", strna(filename), line, p); | |
f27f0e21 GB |
646 | return -EINVAL; |
647 | } | |
648 | ||
649 | if (value && !utf8_is_valid(value)) { | |
3587161a | 650 | _cleanup_free_ char *p = NULL; |
550a40ec | 651 | |
717603e3 LP |
652 | p = utf8_escape_invalid(value); |
653 | log_error("%s:%u: invalid UTF-8 value for key %s: '%s', ignoring.", strna(filename), line, key, p); | |
f27f0e21 GB |
654 | return -EINVAL; |
655 | } | |
a5c32cff | 656 | |
ac466818 ZJS |
657 | return 0; |
658 | } | |
659 | ||
660 | static int parse_env_file_push( | |
661 | const char *filename, unsigned line, | |
662 | const char *key, char *value, | |
663 | void *userdata, | |
664 | int *n_pushed) { | |
665 | ||
666 | const char *k; | |
667 | va_list aq, *ap = userdata; | |
668 | int r; | |
669 | ||
670 | r = check_utf8ness_and_warn(filename, line, key, value); | |
671 | if (r < 0) | |
672 | return r; | |
673 | ||
f27f0e21 | 674 | va_copy(aq, *ap); |
a5c32cff | 675 | |
f27f0e21 GB |
676 | while ((k = va_arg(aq, const char *))) { |
677 | char **v; | |
a5c32cff | 678 | |
f27f0e21 | 679 | v = va_arg(aq, char **); |
a5c32cff | 680 | |
f27f0e21 GB |
681 | if (streq(key, k)) { |
682 | va_end(aq); | |
683 | free(*v); | |
684 | *v = value; | |
a5f6c30d MS |
685 | |
686 | if (n_pushed) | |
687 | (*n_pushed)++; | |
688 | ||
f27f0e21 | 689 | return 1; |
f73141d7 | 690 | } |
335c46b5 | 691 | } |
a5c32cff | 692 | |
f27f0e21 | 693 | va_end(aq); |
f73141d7 | 694 | free(value); |
717603e3 | 695 | |
f73141d7 LP |
696 | return 0; |
697 | } | |
a5c32cff | 698 | |
080dfda8 | 699 | int parse_env_filev( |
1a5a177e | 700 | FILE *f, |
f73141d7 | 701 | const char *fname, |
080dfda8 LP |
702 | const char *newline, |
703 | va_list ap) { | |
a5c32cff | 704 | |
a5f6c30d | 705 | int r, n_pushed = 0; |
080dfda8 | 706 | va_list aq; |
a5c32cff | 707 | |
f73141d7 LP |
708 | if (!newline) |
709 | newline = NEWLINE; | |
a5c32cff | 710 | |
080dfda8 LP |
711 | va_copy(aq, ap); |
712 | r = parse_env_file_internal(f, fname, newline, parse_env_file_push, &aq, &n_pushed); | |
713 | va_end(aq); | |
714 | if (r < 0) | |
715 | return r; | |
716 | ||
717 | return n_pushed; | |
718 | } | |
719 | ||
720 | int parse_env_file( | |
721 | FILE *f, | |
722 | const char *fname, | |
723 | const char *newline, | |
724 | ...) { | |
725 | ||
726 | va_list ap; | |
727 | int r; | |
728 | ||
f73141d7 | 729 | va_start(ap, newline); |
080dfda8 | 730 | r = parse_env_filev(f, fname, newline, ap); |
f73141d7 | 731 | va_end(ap); |
a5c32cff | 732 | |
080dfda8 | 733 | return r; |
f73141d7 | 734 | } |
a5c32cff | 735 | |
717603e3 LP |
736 | static int load_env_file_push( |
737 | const char *filename, unsigned line, | |
738 | const char *key, char *value, | |
a5f6c30d MS |
739 | void *userdata, |
740 | int *n_pushed) { | |
f27f0e21 GB |
741 | char ***m = userdata; |
742 | char *p; | |
743 | int r; | |
a5c32cff | 744 | |
ac466818 ZJS |
745 | r = check_utf8ness_and_warn(filename, line, key, value); |
746 | if (r < 0) | |
747 | return r; | |
a5c32cff | 748 | |
99003e01 | 749 | p = strjoin(key, "=", value); |
f27f0e21 GB |
750 | if (!p) |
751 | return -ENOMEM; | |
335c46b5 | 752 | |
99003e01 ZJS |
753 | r = strv_env_replace(m, p); |
754 | if (r < 0) { | |
755 | free(p); | |
f27f0e21 | 756 | return r; |
99003e01 | 757 | } |
a5c32cff | 758 | |
a5f6c30d MS |
759 | if (n_pushed) |
760 | (*n_pushed)++; | |
761 | ||
f73141d7 LP |
762 | free(value); |
763 | return 0; | |
764 | } | |
765 | ||
717603e3 LP |
766 | int load_env_file(FILE *f, const char *fname, const char *newline, char ***rl) { |
767 | char **m = NULL; | |
768 | int r; | |
769 | ||
770 | if (!newline) | |
771 | newline = NEWLINE; | |
772 | ||
a5f6c30d | 773 | r = parse_env_file_internal(f, fname, newline, load_env_file_push, &m, NULL); |
717603e3 LP |
774 | if (r < 0) { |
775 | strv_free(m); | |
776 | return r; | |
777 | } | |
778 | ||
779 | *rl = m; | |
780 | return 0; | |
781 | } | |
782 | ||
783 | static int load_env_file_push_pairs( | |
784 | const char *filename, unsigned line, | |
785 | const char *key, char *value, | |
a5f6c30d MS |
786 | void *userdata, |
787 | int *n_pushed) { | |
717603e3 LP |
788 | char ***m = userdata; |
789 | int r; | |
790 | ||
ac466818 ZJS |
791 | r = check_utf8ness_and_warn(filename, line, key, value); |
792 | if (r < 0) | |
793 | return r; | |
717603e3 LP |
794 | |
795 | r = strv_extend(m, key); | |
796 | if (r < 0) | |
797 | return -ENOMEM; | |
798 | ||
799 | if (!value) { | |
800 | r = strv_extend(m, ""); | |
801 | if (r < 0) | |
802 | return -ENOMEM; | |
803 | } else { | |
804 | r = strv_push(m, value); | |
805 | if (r < 0) | |
806 | return r; | |
807 | } | |
808 | ||
a5f6c30d MS |
809 | if (n_pushed) |
810 | (*n_pushed)++; | |
811 | ||
717603e3 LP |
812 | return 0; |
813 | } | |
814 | ||
815 | int load_env_file_pairs(FILE *f, const char *fname, const char *newline, char ***rl) { | |
f73141d7 LP |
816 | char **m = NULL; |
817 | int r; | |
a5c32cff | 818 | |
f73141d7 LP |
819 | if (!newline) |
820 | newline = NEWLINE; | |
821 | ||
a5f6c30d | 822 | r = parse_env_file_internal(f, fname, newline, load_env_file_push_pairs, &m, NULL); |
f73141d7 LP |
823 | if (r < 0) { |
824 | strv_free(m); | |
825 | return r; | |
a5c32cff HH |
826 | } |
827 | ||
828 | *rl = m; | |
a5c32cff HH |
829 | return 0; |
830 | } | |
831 | ||
37f3ffca RS |
832 | static int merge_env_file_push( |
833 | const char *filename, unsigned line, | |
834 | const char *key, char *value, | |
835 | void *userdata, | |
836 | int *n_pushed) { | |
837 | ||
838 | char ***env = userdata; | |
839 | char *expanded_value; | |
840 | ||
841 | assert(env); | |
842 | ||
184d1904 ZJS |
843 | if (!value) { |
844 | log_error("%s:%u: invalid syntax (around \"%s\"), ignoring.", strna(filename), line, key); | |
845 | return 0; | |
846 | } | |
847 | ||
848 | if (!env_name_is_valid(key)) { | |
849 | log_error("%s:%u: invalid variable name \"%s\", ignoring.", strna(filename), line, key); | |
2ea8081a | 850 | free(value); |
184d1904 ZJS |
851 | return 0; |
852 | } | |
853 | ||
ccad1fd0 | 854 | expanded_value = replace_env(value, *env, |
b82f58bf RS |
855 | REPLACE_ENV_USE_ENVIRONMENT| |
856 | REPLACE_ENV_ALLOW_BRACELESS| | |
857 | REPLACE_ENV_ALLOW_EXTENDED); | |
37f3ffca RS |
858 | if (!expanded_value) |
859 | return -ENOMEM; | |
860 | ||
861 | free_and_replace(value, expanded_value); | |
862 | ||
863 | return load_env_file_push(filename, line, key, value, env, n_pushed); | |
864 | } | |
865 | ||
866 | int merge_env_file( | |
867 | char ***env, | |
868 | FILE *f, | |
869 | const char *fname) { | |
870 | ||
ccad1fd0 | 871 | /* NOTE: this function supports braceful and braceless variable expansions, |
b82f58bf | 872 | * plus "extended" substitutions, unlike other exported parsing functions. |
ccad1fd0 ZJS |
873 | */ |
874 | ||
37f3ffca RS |
875 | return parse_env_file_internal(f, fname, NEWLINE, merge_env_file_push, env, NULL); |
876 | } | |
877 | ||
768100ef LP |
878 | static void write_env_var(FILE *f, const char *v) { |
879 | const char *p; | |
880 | ||
881 | p = strchr(v, '='); | |
882 | if (!p) { | |
883 | /* Fallback */ | |
4b61c875 LP |
884 | fputs_unlocked(v, f); |
885 | fputc_unlocked('\n', f); | |
768100ef LP |
886 | return; |
887 | } | |
888 | ||
889 | p++; | |
4b61c875 | 890 | fwrite_unlocked(v, 1, p-v, f); |
768100ef | 891 | |
0ce5a806 | 892 | if (string_has_cc(p, NULL) || chars_intersect(p, WHITESPACE SHELL_NEED_QUOTES)) { |
4b61c875 | 893 | fputc_unlocked('\"', f); |
768100ef LP |
894 | |
895 | for (; *p; p++) { | |
0ce5a806 | 896 | if (strchr(SHELL_NEED_ESCAPE, *p)) |
4b61c875 | 897 | fputc_unlocked('\\', f); |
768100ef | 898 | |
4b61c875 | 899 | fputc_unlocked(*p, f); |
768100ef LP |
900 | } |
901 | ||
4b61c875 | 902 | fputc_unlocked('\"', f); |
768100ef | 903 | } else |
4b61c875 | 904 | fputs_unlocked(p, f); |
768100ef | 905 | |
4b61c875 | 906 | fputc_unlocked('\n', f); |
768100ef LP |
907 | } |
908 | ||
a5c32cff | 909 | int write_env_file(const char *fname, char **l) { |
7fd1b19b | 910 | _cleanup_fclose_ FILE *f = NULL; |
736937e5 LP |
911 | _cleanup_free_ char *p = NULL; |
912 | char **i; | |
a5c32cff HH |
913 | int r; |
914 | ||
736937e5 LP |
915 | assert(fname); |
916 | ||
a5c32cff HH |
917 | r = fopen_temporary(fname, &f, &p); |
918 | if (r < 0) | |
919 | return r; | |
920 | ||
35bbbf85 LP |
921 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); |
922 | (void) fchmod_umask(fileno(f), 0644); | |
a5c32cff | 923 | |
768100ef LP |
924 | STRV_FOREACH(i, l) |
925 | write_env_var(f, *i); | |
a5c32cff | 926 | |
736937e5 LP |
927 | r = fflush_and_check(f); |
928 | if (r >= 0) { | |
929 | if (rename(p, fname) >= 0) | |
930 | return 0; | |
a5c32cff | 931 | |
736937e5 | 932 | r = -errno; |
a5c32cff HH |
933 | } |
934 | ||
736937e5 | 935 | unlink(p); |
a5c32cff HH |
936 | return r; |
937 | } | |
68fee104 ZJS |
938 | |
939 | int executable_is_script(const char *path, char **interpreter) { | |
c8b32e11 | 940 | _cleanup_free_ char *line = NULL; |
99c61f6b | 941 | size_t len; |
68fee104 | 942 | char *ans; |
99c61f6b | 943 | int r; |
68fee104 ZJS |
944 | |
945 | assert(path); | |
946 | ||
947 | r = read_one_line_file(path, &line); | |
99c61f6b LP |
948 | if (r == -ENOBUFS) /* First line overly long? if so, then it's not a script */ |
949 | return 0; | |
68fee104 ZJS |
950 | if (r < 0) |
951 | return r; | |
952 | ||
953 | if (!startswith(line, "#!")) | |
954 | return 0; | |
955 | ||
956 | ans = strstrip(line + 2); | |
957 | len = strcspn(ans, " \t"); | |
958 | ||
959 | if (len == 0) | |
960 | return 0; | |
961 | ||
962 | ans = strndup(ans, len); | |
963 | if (!ans) | |
964 | return -ENOMEM; | |
965 | ||
966 | *interpreter = ans; | |
967 | return 1; | |
968 | } | |
69ab8088 ZJS |
969 | |
970 | /** | |
0a7b53bd | 971 | * Retrieve one field from a file like /proc/self/status. pattern |
c4cd1d4d AK |
972 | * should not include whitespace or the delimiter (':'). pattern matches only |
973 | * the beginning of a line. Whitespace before ':' is skipped. Whitespace and | |
974 | * zeros after the ':' will be skipped. field must be freed afterwards. | |
975 | * terminator specifies the terminating characters of the field value (not | |
976 | * included in the value). | |
69ab8088 | 977 | */ |
c4cd1d4d | 978 | int get_proc_field(const char *filename, const char *pattern, const char *terminator, char **field) { |
69ab8088 | 979 | _cleanup_free_ char *status = NULL; |
90110825 | 980 | char *t, *f; |
69ab8088 ZJS |
981 | size_t len; |
982 | int r; | |
983 | ||
c4cd1d4d | 984 | assert(terminator); |
69ab8088 | 985 | assert(filename); |
7ff7394d | 986 | assert(pattern); |
69ab8088 ZJS |
987 | assert(field); |
988 | ||
989 | r = read_full_file(filename, &status, NULL); | |
990 | if (r < 0) | |
991 | return r; | |
992 | ||
c4cd1d4d AK |
993 | t = status; |
994 | ||
995 | do { | |
996 | bool pattern_ok; | |
997 | ||
998 | do { | |
999 | t = strstr(t, pattern); | |
1000 | if (!t) | |
1001 | return -ENOENT; | |
1002 | ||
1003 | /* Check that pattern occurs in beginning of line. */ | |
1004 | pattern_ok = (t == status || t[-1] == '\n'); | |
1005 | ||
1006 | t += strlen(pattern); | |
1007 | ||
1008 | } while (!pattern_ok); | |
1009 | ||
1010 | t += strspn(t, " \t"); | |
1011 | if (!*t) | |
1012 | return -ENOENT; | |
1013 | ||
1014 | } while (*t != ':'); | |
1015 | ||
1016 | t++; | |
69ab8088 | 1017 | |
4ec29144 | 1018 | if (*t) { |
1e5413f7 ZJS |
1019 | t += strspn(t, " \t"); |
1020 | ||
1021 | /* Also skip zeros, because when this is used for | |
1022 | * capabilities, we don't want the zeros. This way the | |
1023 | * same capability set always maps to the same string, | |
1024 | * irrespective of the total capability set size. For | |
1025 | * other numbers it shouldn't matter. */ | |
1026 | t += strspn(t, "0"); | |
4ec29144 ZJS |
1027 | /* Back off one char if there's nothing but whitespace |
1028 | and zeros */ | |
1e5413f7 | 1029 | if (!*t || isspace(*t)) |
313cefa1 | 1030 | t--; |
4ec29144 | 1031 | } |
69ab8088 | 1032 | |
c4cd1d4d | 1033 | len = strcspn(t, terminator); |
69ab8088 | 1034 | |
90110825 LP |
1035 | f = strndup(t, len); |
1036 | if (!f) | |
69ab8088 ZJS |
1037 | return -ENOMEM; |
1038 | ||
90110825 | 1039 | *field = f; |
69ab8088 ZJS |
1040 | return 0; |
1041 | } | |
0d39fa9c LP |
1042 | |
1043 | DIR *xopendirat(int fd, const char *name, int flags) { | |
1044 | int nfd; | |
1045 | DIR *d; | |
1046 | ||
1047 | assert(!(flags & O_CREAT)); | |
1048 | ||
1049 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
1050 | if (nfd < 0) | |
1051 | return NULL; | |
1052 | ||
1053 | d = fdopendir(nfd); | |
1054 | if (!d) { | |
1055 | safe_close(nfd); | |
1056 | return NULL; | |
1057 | } | |
1058 | ||
1059 | return d; | |
1060 | } | |
1061 | ||
1062 | static int search_and_fopen_internal(const char *path, const char *mode, const char *root, char **search, FILE **_f) { | |
1063 | char **i; | |
1064 | ||
1065 | assert(path); | |
1066 | assert(mode); | |
1067 | assert(_f); | |
1068 | ||
1069 | if (!path_strv_resolve_uniq(search, root)) | |
1070 | return -ENOMEM; | |
1071 | ||
1072 | STRV_FOREACH(i, search) { | |
1073 | _cleanup_free_ char *p = NULL; | |
1074 | FILE *f; | |
1075 | ||
1076 | if (root) | |
605405c6 | 1077 | p = strjoin(root, *i, "/", path); |
0d39fa9c | 1078 | else |
605405c6 | 1079 | p = strjoin(*i, "/", path); |
0d39fa9c LP |
1080 | if (!p) |
1081 | return -ENOMEM; | |
1082 | ||
1083 | f = fopen(p, mode); | |
1084 | if (f) { | |
1085 | *_f = f; | |
1086 | return 0; | |
1087 | } | |
1088 | ||
1089 | if (errno != ENOENT) | |
1090 | return -errno; | |
1091 | } | |
1092 | ||
1093 | return -ENOENT; | |
1094 | } | |
1095 | ||
1096 | int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f) { | |
1097 | _cleanup_strv_free_ char **copy = NULL; | |
1098 | ||
1099 | assert(path); | |
1100 | assert(mode); | |
1101 | assert(_f); | |
1102 | ||
1103 | if (path_is_absolute(path)) { | |
1104 | FILE *f; | |
1105 | ||
1106 | f = fopen(path, mode); | |
1107 | if (f) { | |
1108 | *_f = f; | |
1109 | return 0; | |
1110 | } | |
1111 | ||
1112 | return -errno; | |
1113 | } | |
1114 | ||
1115 | copy = strv_copy((char**) search); | |
1116 | if (!copy) | |
1117 | return -ENOMEM; | |
1118 | ||
1119 | return search_and_fopen_internal(path, mode, root, copy, _f); | |
1120 | } | |
1121 | ||
1122 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f) { | |
1123 | _cleanup_strv_free_ char **s = NULL; | |
1124 | ||
1125 | if (path_is_absolute(path)) { | |
1126 | FILE *f; | |
1127 | ||
1128 | f = fopen(path, mode); | |
1129 | if (f) { | |
1130 | *_f = f; | |
1131 | return 0; | |
1132 | } | |
1133 | ||
1134 | return -errno; | |
1135 | } | |
1136 | ||
1137 | s = strv_split_nulstr(search); | |
1138 | if (!s) | |
1139 | return -ENOMEM; | |
1140 | ||
1141 | return search_and_fopen_internal(path, mode, root, s, _f); | |
1142 | } | |
1143 | ||
1144 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { | |
1145 | FILE *f; | |
1146 | char *t; | |
1147 | int r, fd; | |
1148 | ||
1149 | assert(path); | |
1150 | assert(_f); | |
1151 | assert(_temp_path); | |
1152 | ||
1153 | r = tempfn_xxxxxx(path, NULL, &t); | |
1154 | if (r < 0) | |
1155 | return r; | |
1156 | ||
646853bd | 1157 | fd = mkostemp_safe(t); |
0d39fa9c LP |
1158 | if (fd < 0) { |
1159 | free(t); | |
1160 | return -errno; | |
1161 | } | |
1162 | ||
1163 | f = fdopen(fd, "we"); | |
1164 | if (!f) { | |
1165 | unlink_noerrno(t); | |
1166 | free(t); | |
1167 | safe_close(fd); | |
1168 | return -errno; | |
1169 | } | |
1170 | ||
1171 | *_f = f; | |
1172 | *_temp_path = t; | |
1173 | ||
1174 | return 0; | |
1175 | } | |
1176 | ||
1177 | int fflush_and_check(FILE *f) { | |
1178 | assert(f); | |
1179 | ||
1180 | errno = 0; | |
1181 | fflush(f); | |
1182 | ||
1183 | if (ferror(f)) | |
f5e5c28f | 1184 | return errno > 0 ? -errno : -EIO; |
0d39fa9c LP |
1185 | |
1186 | return 0; | |
1187 | } | |
1188 | ||
0675e94a AJ |
1189 | int fflush_sync_and_check(FILE *f) { |
1190 | int r; | |
1191 | ||
1192 | assert(f); | |
1193 | ||
1194 | r = fflush_and_check(f); | |
1195 | if (r < 0) | |
1196 | return r; | |
1197 | ||
1198 | if (fsync(fileno(f)) < 0) | |
1199 | return -errno; | |
1200 | ||
8ac2f74f LP |
1201 | r = fsync_directory_of_file(fileno(f)); |
1202 | if (r < 0) | |
1203 | return r; | |
1204 | ||
0675e94a AJ |
1205 | return 0; |
1206 | } | |
1207 | ||
61233823 | 1208 | /* This is much like mkostemp() but is subject to umask(). */ |
646853bd | 1209 | int mkostemp_safe(char *pattern) { |
3587161a | 1210 | _cleanup_umask_ mode_t u = 0; |
0d39fa9c LP |
1211 | int fd; |
1212 | ||
1213 | assert(pattern); | |
1214 | ||
1215 | u = umask(077); | |
1216 | ||
646853bd | 1217 | fd = mkostemp(pattern, O_CLOEXEC); |
0d39fa9c LP |
1218 | if (fd < 0) |
1219 | return -errno; | |
1220 | ||
1221 | return fd; | |
1222 | } | |
1223 | ||
0d39fa9c LP |
1224 | int tempfn_xxxxxx(const char *p, const char *extra, char **ret) { |
1225 | const char *fn; | |
1226 | char *t; | |
1227 | ||
1228 | assert(p); | |
1229 | assert(ret); | |
1230 | ||
1231 | /* | |
1232 | * Turns this: | |
1233 | * /foo/bar/waldo | |
1234 | * | |
1235 | * Into this: | |
1236 | * /foo/bar/.#<extra>waldoXXXXXX | |
1237 | */ | |
1238 | ||
1239 | fn = basename(p); | |
1240 | if (!filename_is_valid(fn)) | |
1241 | return -EINVAL; | |
1242 | ||
ad5d4b17 | 1243 | extra = strempty(extra); |
0d39fa9c LP |
1244 | |
1245 | t = new(char, strlen(p) + 2 + strlen(extra) + 6 + 1); | |
1246 | if (!t) | |
1247 | return -ENOMEM; | |
1248 | ||
1249 | strcpy(stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn), "XXXXXX"); | |
1250 | ||
858d36c1 | 1251 | *ret = path_simplify(t, false); |
0d39fa9c LP |
1252 | return 0; |
1253 | } | |
1254 | ||
1255 | int tempfn_random(const char *p, const char *extra, char **ret) { | |
1256 | const char *fn; | |
1257 | char *t, *x; | |
1258 | uint64_t u; | |
1259 | unsigned i; | |
1260 | ||
1261 | assert(p); | |
1262 | assert(ret); | |
1263 | ||
1264 | /* | |
1265 | * Turns this: | |
1266 | * /foo/bar/waldo | |
1267 | * | |
1268 | * Into this: | |
1269 | * /foo/bar/.#<extra>waldobaa2a261115984a9 | |
1270 | */ | |
1271 | ||
1272 | fn = basename(p); | |
1273 | if (!filename_is_valid(fn)) | |
1274 | return -EINVAL; | |
1275 | ||
ad5d4b17 | 1276 | extra = strempty(extra); |
0d39fa9c LP |
1277 | |
1278 | t = new(char, strlen(p) + 2 + strlen(extra) + 16 + 1); | |
1279 | if (!t) | |
1280 | return -ENOMEM; | |
1281 | ||
1282 | x = stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn); | |
1283 | ||
1284 | u = random_u64(); | |
1285 | for (i = 0; i < 16; i++) { | |
1286 | *(x++) = hexchar(u & 0xF); | |
1287 | u >>= 4; | |
1288 | } | |
1289 | ||
1290 | *x = 0; | |
1291 | ||
858d36c1 | 1292 | *ret = path_simplify(t, false); |
0d39fa9c LP |
1293 | return 0; |
1294 | } | |
1295 | ||
1296 | int tempfn_random_child(const char *p, const char *extra, char **ret) { | |
1297 | char *t, *x; | |
1298 | uint64_t u; | |
1299 | unsigned i; | |
992e8f22 | 1300 | int r; |
0d39fa9c | 1301 | |
0d39fa9c LP |
1302 | assert(ret); |
1303 | ||
1304 | /* Turns this: | |
1305 | * /foo/bar/waldo | |
1306 | * Into this: | |
1307 | * /foo/bar/waldo/.#<extra>3c2b6219aa75d7d0 | |
1308 | */ | |
1309 | ||
992e8f22 LP |
1310 | if (!p) { |
1311 | r = tmp_dir(&p); | |
1312 | if (r < 0) | |
1313 | return r; | |
1314 | } | |
1315 | ||
ad5d4b17 | 1316 | extra = strempty(extra); |
0d39fa9c LP |
1317 | |
1318 | t = new(char, strlen(p) + 3 + strlen(extra) + 16 + 1); | |
1319 | if (!t) | |
1320 | return -ENOMEM; | |
1321 | ||
1322 | x = stpcpy(stpcpy(stpcpy(t, p), "/.#"), extra); | |
1323 | ||
1324 | u = random_u64(); | |
1325 | for (i = 0; i < 16; i++) { | |
1326 | *(x++) = hexchar(u & 0xF); | |
1327 | u >>= 4; | |
1328 | } | |
1329 | ||
1330 | *x = 0; | |
1331 | ||
858d36c1 | 1332 | *ret = path_simplify(t, false); |
0d39fa9c LP |
1333 | return 0; |
1334 | } | |
33d52ab9 LP |
1335 | |
1336 | int write_timestamp_file_atomic(const char *fn, usec_t n) { | |
1337 | char ln[DECIMAL_STR_MAX(n)+2]; | |
1338 | ||
1339 | /* Creates a "timestamp" file, that contains nothing but a | |
1340 | * usec_t timestamp, formatted in ASCII. */ | |
1341 | ||
1342 | if (n <= 0 || n >= USEC_INFINITY) | |
1343 | return -ERANGE; | |
1344 | ||
1345 | xsprintf(ln, USEC_FMT "\n", n); | |
1346 | ||
1347 | return write_string_file(fn, ln, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC); | |
1348 | } | |
1349 | ||
1350 | int read_timestamp_file(const char *fn, usec_t *ret) { | |
1351 | _cleanup_free_ char *ln = NULL; | |
1352 | uint64_t t; | |
1353 | int r; | |
1354 | ||
1355 | r = read_one_line_file(fn, &ln); | |
1356 | if (r < 0) | |
1357 | return r; | |
1358 | ||
1359 | r = safe_atou64(ln, &t); | |
1360 | if (r < 0) | |
1361 | return r; | |
1362 | ||
1363 | if (t <= 0 || t >= (uint64_t) USEC_INFINITY) | |
1364 | return -ERANGE; | |
1365 | ||
1366 | *ret = (usec_t) t; | |
1367 | return 0; | |
1368 | } | |
d390f8ef LP |
1369 | |
1370 | int fputs_with_space(FILE *f, const char *s, const char *separator, bool *space) { | |
1371 | int r; | |
1372 | ||
1373 | assert(s); | |
1374 | ||
1375 | /* Outputs the specified string with fputs(), but optionally prefixes it with a separator. The *space parameter | |
1376 | * when specified shall initially point to a boolean variable initialized to false. It is set to true after the | |
1377 | * first invocation. This call is supposed to be use in loops, where a separator shall be inserted between each | |
1378 | * element, but not before the first one. */ | |
1379 | ||
1380 | if (!f) | |
1381 | f = stdout; | |
1382 | ||
1383 | if (space) { | |
1384 | if (!separator) | |
1385 | separator = " "; | |
1386 | ||
1387 | if (*space) { | |
1388 | r = fputs(separator, f); | |
1389 | if (r < 0) | |
1390 | return r; | |
1391 | } | |
1392 | ||
1393 | *space = true; | |
1394 | } | |
1395 | ||
1396 | return fputs(s, f); | |
1397 | } | |
03532f0a LP |
1398 | |
1399 | int open_tmpfile_unlinkable(const char *directory, int flags) { | |
1400 | char *p; | |
992e8f22 | 1401 | int fd, r; |
03532f0a | 1402 | |
992e8f22 LP |
1403 | if (!directory) { |
1404 | r = tmp_dir(&directory); | |
1405 | if (r < 0) | |
1406 | return r; | |
1407 | } | |
03532f0a LP |
1408 | |
1409 | /* Returns an unlinked temporary file that cannot be linked into the file system anymore */ | |
1410 | ||
03532f0a LP |
1411 | /* Try O_TMPFILE first, if it is supported */ |
1412 | fd = open(directory, flags|O_TMPFILE|O_EXCL, S_IRUSR|S_IWUSR); | |
1413 | if (fd >= 0) | |
1414 | return fd; | |
03532f0a LP |
1415 | |
1416 | /* Fall back to unguessable name + unlinking */ | |
1417 | p = strjoina(directory, "/systemd-tmp-XXXXXX"); | |
1418 | ||
646853bd | 1419 | fd = mkostemp_safe(p); |
03532f0a LP |
1420 | if (fd < 0) |
1421 | return fd; | |
1422 | ||
1423 | (void) unlink(p); | |
1424 | ||
1425 | return fd; | |
1426 | } | |
1427 | ||
1428 | int open_tmpfile_linkable(const char *target, int flags, char **ret_path) { | |
1429 | _cleanup_free_ char *tmp = NULL; | |
1430 | int r, fd; | |
1431 | ||
1432 | assert(target); | |
1433 | assert(ret_path); | |
1434 | ||
1435 | /* Don't allow O_EXCL, as that has a special meaning for O_TMPFILE */ | |
1436 | assert((flags & O_EXCL) == 0); | |
1437 | ||
1438 | /* Creates a temporary file, that shall be renamed to "target" later. If possible, this uses O_TMPFILE – in | |
1439 | * which case "ret_path" will be returned as NULL. If not possible a the tempoary path name used is returned in | |
1440 | * "ret_path". Use link_tmpfile() below to rename the result after writing the file in full. */ | |
1441 | ||
03532f0a LP |
1442 | { |
1443 | _cleanup_free_ char *dn = NULL; | |
1444 | ||
1445 | dn = dirname_malloc(target); | |
1446 | if (!dn) | |
1447 | return -ENOMEM; | |
1448 | ||
1449 | fd = open(dn, O_TMPFILE|flags, 0640); | |
1450 | if (fd >= 0) { | |
1451 | *ret_path = NULL; | |
1452 | return fd; | |
1453 | } | |
1454 | ||
1455 | log_debug_errno(errno, "Failed to use O_TMPFILE on %s: %m", dn); | |
1456 | } | |
03532f0a LP |
1457 | |
1458 | r = tempfn_random(target, NULL, &tmp); | |
1459 | if (r < 0) | |
1460 | return r; | |
1461 | ||
1462 | fd = open(tmp, O_CREAT|O_EXCL|O_NOFOLLOW|O_NOCTTY|flags, 0640); | |
1463 | if (fd < 0) | |
1464 | return -errno; | |
1465 | ||
ae2a15bc | 1466 | *ret_path = TAKE_PTR(tmp); |
03532f0a LP |
1467 | |
1468 | return fd; | |
1469 | } | |
1470 | ||
504afd7c ZJS |
1471 | int open_serialization_fd(const char *ident) { |
1472 | int fd = -1; | |
1473 | ||
1474 | fd = memfd_create(ident, MFD_CLOEXEC); | |
1475 | if (fd < 0) { | |
1476 | const char *path; | |
1477 | ||
df0ff127 | 1478 | path = getpid_cached() == 1 ? "/run/systemd" : "/tmp"; |
504afd7c ZJS |
1479 | fd = open_tmpfile_unlinkable(path, O_RDWR|O_CLOEXEC); |
1480 | if (fd < 0) | |
1481 | return fd; | |
1482 | ||
1483 | log_debug("Serializing %s to %s.", ident, path); | |
1484 | } else | |
1485 | log_debug("Serializing %s to memfd.", ident); | |
1486 | ||
1487 | return fd; | |
1488 | } | |
1489 | ||
03532f0a LP |
1490 | int link_tmpfile(int fd, const char *path, const char *target) { |
1491 | ||
1492 | assert(fd >= 0); | |
1493 | assert(target); | |
1494 | ||
1495 | /* Moves a temporary file created with open_tmpfile() above into its final place. if "path" is NULL an fd | |
1496 | * created with O_TMPFILE is assumed, and linkat() is used. Otherwise it is assumed O_TMPFILE is not supported | |
1497 | * on the directory, and renameat2() is used instead. | |
1498 | * | |
f8e2f4d6 | 1499 | * Note that in both cases we will not replace existing files. This is because linkat() does not support this |
03532f0a LP |
1500 | * operation currently (renameat2() does), and there is no nice way to emulate this. */ |
1501 | ||
1502 | if (path) { | |
1503 | if (rename_noreplace(AT_FDCWD, path, AT_FDCWD, target) < 0) | |
1504 | return -errno; | |
1505 | } else { | |
fbd0b64f | 1506 | char proc_fd_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(fd) + 1]; |
03532f0a LP |
1507 | |
1508 | xsprintf(proc_fd_path, "/proc/self/fd/%i", fd); | |
1509 | ||
1510 | if (linkat(AT_FDCWD, proc_fd_path, AT_FDCWD, target, AT_SYMLINK_FOLLOW) < 0) | |
1511 | return -errno; | |
1512 | } | |
1513 | ||
1514 | return 0; | |
1515 | } | |
03c2b288 LP |
1516 | |
1517 | int read_nul_string(FILE *f, char **ret) { | |
1518 | _cleanup_free_ char *x = NULL; | |
1519 | size_t allocated = 0, n = 0; | |
1520 | ||
1521 | assert(f); | |
1522 | assert(ret); | |
1523 | ||
1524 | /* Reads a NUL-terminated string from the specified file. */ | |
1525 | ||
1526 | for (;;) { | |
1527 | int c; | |
1528 | ||
1529 | if (!GREEDY_REALLOC(x, allocated, n+2)) | |
1530 | return -ENOMEM; | |
1531 | ||
1532 | c = fgetc(f); | |
1533 | if (c == 0) /* Terminate at NUL byte */ | |
1534 | break; | |
1535 | if (c == EOF) { | |
1536 | if (ferror(f)) | |
1537 | return -errno; | |
1538 | break; /* Terminate at EOF */ | |
1539 | } | |
1540 | ||
1541 | x[n++] = (char) c; | |
1542 | } | |
1543 | ||
1544 | if (x) | |
1545 | x[n] = 0; | |
1546 | else { | |
1547 | x = new0(char, 1); | |
1548 | if (!x) | |
1549 | return -ENOMEM; | |
1550 | } | |
1551 | ||
ae2a15bc | 1552 | *ret = TAKE_PTR(x); |
03c2b288 LP |
1553 | |
1554 | return 0; | |
1555 | } | |
676bcb0f LP |
1556 | |
1557 | int mkdtemp_malloc(const char *template, char **ret) { | |
3f403039 LP |
1558 | _cleanup_free_ char *p = NULL; |
1559 | int r; | |
676bcb0f | 1560 | |
676bcb0f LP |
1561 | assert(ret); |
1562 | ||
3f403039 LP |
1563 | if (template) |
1564 | p = strdup(template); | |
1565 | else { | |
1566 | const char *tmp; | |
1567 | ||
1568 | r = tmp_dir(&tmp); | |
1569 | if (r < 0) | |
1570 | return r; | |
1571 | ||
1572 | p = strjoin(tmp, "/XXXXXX"); | |
1573 | } | |
676bcb0f LP |
1574 | if (!p) |
1575 | return -ENOMEM; | |
1576 | ||
3f403039 | 1577 | if (!mkdtemp(p)) |
676bcb0f | 1578 | return -errno; |
676bcb0f | 1579 | |
3f403039 | 1580 | *ret = TAKE_PTR(p); |
676bcb0f LP |
1581 | return 0; |
1582 | } | |
4f9a66a3 | 1583 | |
57d6f700 | 1584 | DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, funlockfile); |
f858e514 | 1585 | |
4f9a66a3 LP |
1586 | int read_line(FILE *f, size_t limit, char **ret) { |
1587 | _cleanup_free_ char *buffer = NULL; | |
1588 | size_t n = 0, allocated = 0, count = 0; | |
4f9a66a3 LP |
1589 | |
1590 | assert(f); | |
1591 | ||
1592 | /* Something like a bounded version of getline(). | |
1593 | * | |
1594 | * Considers EOF, \n and \0 end of line delimiters, and does not include these delimiters in the string | |
1595 | * returned. | |
1596 | * | |
1597 | * Returns the number of bytes read from the files (i.e. including delimiters — this hence usually differs from | |
1598 | * the number of characters in the returned string). When EOF is hit, 0 is returned. | |
1599 | * | |
1600 | * The input parameter limit is the maximum numbers of characters in the returned string, i.e. excluding | |
1601 | * delimiters. If the limit is hit we fail and return -ENOBUFS. | |
1602 | * | |
1603 | * If a line shall be skipped ret may be initialized as NULL. */ | |
1604 | ||
1605 | if (ret) { | |
1606 | if (!GREEDY_REALLOC(buffer, allocated, 1)) | |
1607 | return -ENOMEM; | |
1608 | } | |
1609 | ||
f858e514 | 1610 | { |
3f691417 | 1611 | _unused_ _cleanup_(funlockfilep) FILE *flocked = f; |
f858e514 | 1612 | flockfile(f); |
4f9a66a3 | 1613 | |
f858e514 ZJS |
1614 | for (;;) { |
1615 | int c; | |
4f9a66a3 | 1616 | |
f858e514 ZJS |
1617 | if (n >= limit) |
1618 | return -ENOBUFS; | |
4f9a66a3 | 1619 | |
f858e514 ZJS |
1620 | errno = 0; |
1621 | c = fgetc_unlocked(f); | |
1622 | if (c == EOF) { | |
1623 | /* if we read an error, and have no data to return, then propagate the error */ | |
1624 | if (ferror_unlocked(f) && n == 0) | |
1625 | return errno > 0 ? -errno : -EIO; | |
1626 | ||
1627 | break; | |
4f9a66a3 LP |
1628 | } |
1629 | ||
f858e514 | 1630 | count++; |
4f9a66a3 | 1631 | |
f858e514 ZJS |
1632 | if (IN_SET(c, '\n', 0)) /* Reached a delimiter */ |
1633 | break; | |
4f9a66a3 | 1634 | |
f858e514 ZJS |
1635 | if (ret) { |
1636 | if (!GREEDY_REALLOC(buffer, allocated, n + 2)) | |
1637 | return -ENOMEM; | |
4f9a66a3 | 1638 | |
f858e514 | 1639 | buffer[n] = (char) c; |
4f9a66a3 LP |
1640 | } |
1641 | ||
f858e514 | 1642 | n++; |
4f9a66a3 | 1643 | } |
4f9a66a3 LP |
1644 | } |
1645 | ||
4f9a66a3 LP |
1646 | if (ret) { |
1647 | buffer[n] = 0; | |
1648 | ||
1cc6c93a | 1649 | *ret = TAKE_PTR(buffer); |
4f9a66a3 LP |
1650 | } |
1651 | ||
1652 | return (int) count; | |
1653 | } |