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a5c32cff HH |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <unistd.h> | |
cda134ab | 23 | |
b5efdb8a | 24 | #include "alloc-util.h" |
4f5dd394 LP |
25 | #include "ctype.h" |
26 | #include "escape.h" | |
3ffd4af2 LP |
27 | #include "fd-util.h" |
28 | #include "fileio.h" | |
f4f15635 | 29 | #include "fs-util.h" |
0d39fa9c LP |
30 | #include "hexdecoct.h" |
31 | #include "path-util.h" | |
32 | #include "random-util.h" | |
07630cea | 33 | #include "string-util.h" |
a5c32cff | 34 | #include "strv.h" |
affb60b1 | 35 | #include "umask-util.h" |
335c46b5 | 36 | #include "utf8.h" |
4f5dd394 | 37 | #include "util.h" |
a5c32cff | 38 | |
40beecdb | 39 | int write_string_stream(FILE *f, const char *line, bool enforce_newline) { |
dacd6cee | 40 | |
717603e3 LP |
41 | assert(f); |
42 | assert(line); | |
43 | ||
fec6fc6b | 44 | fputs(line, f); |
40beecdb | 45 | if (enforce_newline && !endswith(line, "\n")) |
a5c32cff HH |
46 | fputc('\n', f); |
47 | ||
dacd6cee | 48 | return fflush_and_check(f); |
a5c32cff HH |
49 | } |
50 | ||
4c1fc3e4 | 51 | static int write_string_file_atomic(const char *fn, const char *line, bool enforce_newline) { |
a5c32cff HH |
52 | _cleanup_fclose_ FILE *f = NULL; |
53 | _cleanup_free_ char *p = NULL; | |
54 | int r; | |
55 | ||
56 | assert(fn); | |
57 | assert(line); | |
58 | ||
59 | r = fopen_temporary(fn, &f, &p); | |
60 | if (r < 0) | |
61 | return r; | |
62 | ||
0d39fa9c | 63 | (void) fchmod_umask(fileno(f), 0644); |
a5c32cff | 64 | |
4c1fc3e4 | 65 | r = write_string_stream(f, line, enforce_newline); |
f2997962 | 66 | if (r >= 0) { |
a5c32cff HH |
67 | if (rename(p, fn) < 0) |
68 | r = -errno; | |
a5c32cff HH |
69 | } |
70 | ||
a5c32cff | 71 | if (r < 0) |
0d39fa9c | 72 | (void) unlink(p); |
a5c32cff HH |
73 | |
74 | return r; | |
75 | } | |
76 | ||
4c1fc3e4 DM |
77 | int write_string_file(const char *fn, const char *line, WriteStringFileFlags flags) { |
78 | _cleanup_fclose_ FILE *f = NULL; | |
79 | ||
80 | assert(fn); | |
81 | assert(line); | |
82 | ||
83 | if (flags & WRITE_STRING_FILE_ATOMIC) { | |
84 | assert(flags & WRITE_STRING_FILE_CREATE); | |
85 | ||
86 | return write_string_file_atomic(fn, line, !(flags & WRITE_STRING_FILE_AVOID_NEWLINE)); | |
87 | } | |
88 | ||
89 | if (flags & WRITE_STRING_FILE_CREATE) { | |
90 | f = fopen(fn, "we"); | |
91 | if (!f) | |
92 | return -errno; | |
93 | } else { | |
94 | int fd; | |
95 | ||
96 | /* We manually build our own version of fopen(..., "we") that | |
97 | * works without O_CREAT */ | |
98 | fd = open(fn, O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
99 | if (fd < 0) | |
100 | return -errno; | |
101 | ||
102 | f = fdopen(fd, "we"); | |
103 | if (!f) { | |
104 | safe_close(fd); | |
105 | return -errno; | |
106 | } | |
107 | } | |
108 | ||
109 | return write_string_stream(f, line, !(flags & WRITE_STRING_FILE_AVOID_NEWLINE)); | |
110 | } | |
111 | ||
a5c32cff HH |
112 | int read_one_line_file(const char *fn, char **line) { |
113 | _cleanup_fclose_ FILE *f = NULL; | |
114 | char t[LINE_MAX], *c; | |
115 | ||
116 | assert(fn); | |
117 | assert(line); | |
118 | ||
119 | f = fopen(fn, "re"); | |
120 | if (!f) | |
121 | return -errno; | |
122 | ||
123 | if (!fgets(t, sizeof(t), f)) { | |
124 | ||
125 | if (ferror(f)) | |
126 | return errno ? -errno : -EIO; | |
127 | ||
128 | t[0] = 0; | |
129 | } | |
130 | ||
131 | c = strdup(t); | |
132 | if (!c) | |
133 | return -ENOMEM; | |
134 | truncate_nl(c); | |
135 | ||
136 | *line = c; | |
137 | return 0; | |
138 | } | |
139 | ||
15dee3f0 LP |
140 | int verify_one_line_file(const char *fn, const char *line) { |
141 | _cleanup_free_ char *value = NULL; | |
142 | int r; | |
143 | ||
144 | r = read_one_line_file(fn, &value); | |
145 | if (r < 0) | |
146 | return r; | |
147 | ||
148 | return streq(value, line); | |
149 | } | |
150 | ||
717603e3 | 151 | int read_full_stream(FILE *f, char **contents, size_t *size) { |
a5c32cff HH |
152 | size_t n, l; |
153 | _cleanup_free_ char *buf = NULL; | |
154 | struct stat st; | |
155 | ||
717603e3 | 156 | assert(f); |
a5c32cff HH |
157 | assert(contents); |
158 | ||
a5c32cff HH |
159 | if (fstat(fileno(f), &st) < 0) |
160 | return -errno; | |
161 | ||
717603e3 | 162 | n = LINE_MAX; |
a5c32cff | 163 | |
717603e3 LP |
164 | if (S_ISREG(st.st_mode)) { |
165 | ||
166 | /* Safety check */ | |
167 | if (st.st_size > 4*1024*1024) | |
168 | return -E2BIG; | |
169 | ||
170 | /* Start with the right file size, but be prepared for | |
171 | * files from /proc which generally report a file size | |
172 | * of 0 */ | |
173 | if (st.st_size > 0) | |
174 | n = st.st_size; | |
175 | } | |
a5c32cff | 176 | |
717603e3 | 177 | l = 0; |
a5c32cff HH |
178 | for (;;) { |
179 | char *t; | |
180 | size_t k; | |
181 | ||
182 | t = realloc(buf, n+1); | |
183 | if (!t) | |
184 | return -ENOMEM; | |
185 | ||
186 | buf = t; | |
187 | k = fread(buf + l, 1, n - l, f); | |
188 | ||
189 | if (k <= 0) { | |
190 | if (ferror(f)) | |
191 | return -errno; | |
192 | ||
193 | break; | |
194 | } | |
195 | ||
196 | l += k; | |
197 | n *= 2; | |
198 | ||
199 | /* Safety check */ | |
200 | if (n > 4*1024*1024) | |
201 | return -E2BIG; | |
202 | } | |
203 | ||
204 | buf[l] = 0; | |
205 | *contents = buf; | |
d78a28e3 | 206 | buf = NULL; /* do not free */ |
a5c32cff HH |
207 | |
208 | if (size) | |
209 | *size = l; | |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
717603e3 LP |
214 | int read_full_file(const char *fn, char **contents, size_t *size) { |
215 | _cleanup_fclose_ FILE *f = NULL; | |
216 | ||
217 | assert(fn); | |
218 | assert(contents); | |
219 | ||
220 | f = fopen(fn, "re"); | |
221 | if (!f) | |
222 | return -errno; | |
223 | ||
224 | return read_full_stream(f, contents, size); | |
225 | } | |
226 | ||
f73141d7 | 227 | static int parse_env_file_internal( |
717603e3 | 228 | FILE *f, |
a5c32cff | 229 | const char *fname, |
f73141d7 | 230 | const char *newline, |
335c46b5 | 231 | int (*push) (const char *filename, unsigned line, |
a5f6c30d MS |
232 | const char *key, char *value, void *userdata, int *n_pushed), |
233 | void *userdata, | |
234 | int *n_pushed) { | |
f73141d7 LP |
235 | |
236 | _cleanup_free_ char *contents = NULL, *key = NULL; | |
2b77f67e | 237 | 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; |
f73141d7 LP |
238 | char *p, *value = NULL; |
239 | int r; | |
335c46b5 | 240 | unsigned line = 1; |
a5c32cff | 241 | |
f73141d7 LP |
242 | enum { |
243 | PRE_KEY, | |
244 | KEY, | |
f73141d7 LP |
245 | PRE_VALUE, |
246 | VALUE, | |
247 | VALUE_ESCAPE, | |
248 | SINGLE_QUOTE_VALUE, | |
249 | SINGLE_QUOTE_VALUE_ESCAPE, | |
250 | DOUBLE_QUOTE_VALUE, | |
251 | DOUBLE_QUOTE_VALUE_ESCAPE, | |
252 | COMMENT, | |
253 | COMMENT_ESCAPE | |
254 | } state = PRE_KEY; | |
a5c32cff | 255 | |
f73141d7 | 256 | assert(newline); |
a5c32cff | 257 | |
717603e3 LP |
258 | if (f) |
259 | r = read_full_stream(f, &contents, NULL); | |
260 | else | |
261 | r = read_full_file(fname, &contents, NULL); | |
1c17cbed | 262 | if (r < 0) |
a5c32cff HH |
263 | return r; |
264 | ||
f73141d7 LP |
265 | for (p = contents; *p; p++) { |
266 | char c = *p; | |
267 | ||
268 | switch (state) { | |
269 | ||
270 | case PRE_KEY: | |
ebc05a09 | 271 | if (strchr(COMMENTS, c)) |
f73141d7 LP |
272 | state = COMMENT; |
273 | else if (!strchr(WHITESPACE, c)) { | |
274 | state = KEY; | |
2b77f67e LP |
275 | last_key_whitespace = (size_t) -1; |
276 | ||
ca2d3784 | 277 | if (!GREEDY_REALLOC(key, key_alloc, n_key+2)) { |
f73141d7 LP |
278 | r = -ENOMEM; |
279 | goto fail; | |
280 | } | |
281 | ||
282 | key[n_key++] = c; | |
283 | } | |
284 | break; | |
285 | ||
286 | case KEY: | |
287 | if (strchr(newline, c)) { | |
288 | state = PRE_KEY; | |
335c46b5 | 289 | line ++; |
f73141d7 | 290 | n_key = 0; |
2b77f67e | 291 | } else if (c == '=') { |
f73141d7 | 292 | state = PRE_VALUE; |
2b77f67e LP |
293 | last_value_whitespace = (size_t) -1; |
294 | } else { | |
295 | if (!strchr(WHITESPACE, c)) | |
296 | last_key_whitespace = (size_t) -1; | |
297 | else if (last_key_whitespace == (size_t) -1) | |
298 | last_key_whitespace = n_key; | |
299 | ||
ca2d3784 | 300 | if (!GREEDY_REALLOC(key, key_alloc, n_key+2)) { |
f73141d7 LP |
301 | r = -ENOMEM; |
302 | goto fail; | |
303 | } | |
304 | ||
305 | key[n_key++] = c; | |
306 | } | |
a5c32cff | 307 | |
f73141d7 LP |
308 | break; |
309 | ||
f73141d7 | 310 | case PRE_VALUE: |
98f59e59 | 311 | if (strchr(newline, c)) { |
f73141d7 | 312 | state = PRE_KEY; |
335c46b5 | 313 | line ++; |
f73141d7 | 314 | key[n_key] = 0; |
a5c32cff | 315 | |
f73141d7 LP |
316 | if (value) |
317 | value[n_value] = 0; | |
a5c32cff | 318 | |
ebc05a09 | 319 | /* strip trailing whitespace from key */ |
2b77f67e LP |
320 | if (last_key_whitespace != (size_t) -1) |
321 | key[last_key_whitespace] = 0; | |
ebc05a09 | 322 | |
a5f6c30d | 323 | r = push(fname, line, key, value, userdata, n_pushed); |
f73141d7 LP |
324 | if (r < 0) |
325 | goto fail; | |
326 | ||
327 | n_key = 0; | |
328 | value = NULL; | |
329 | value_alloc = n_value = 0; | |
2b77f67e | 330 | |
f73141d7 LP |
331 | } else if (c == '\'') |
332 | state = SINGLE_QUOTE_VALUE; | |
333 | else if (c == '\"') | |
334 | state = DOUBLE_QUOTE_VALUE; | |
335 | else if (c == '\\') | |
336 | state = VALUE_ESCAPE; | |
337 | else if (!strchr(WHITESPACE, c)) { | |
338 | state = VALUE; | |
339 | ||
ca2d3784 | 340 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
341 | r = -ENOMEM; |
342 | goto fail; | |
343 | } | |
344 | ||
345 | value[n_value++] = c; | |
346 | } | |
347 | ||
348 | break; | |
349 | ||
350 | case VALUE: | |
351 | if (strchr(newline, c)) { | |
352 | state = PRE_KEY; | |
335c46b5 | 353 | line ++; |
98f59e59 | 354 | |
f73141d7 LP |
355 | key[n_key] = 0; |
356 | ||
357 | if (value) | |
358 | value[n_value] = 0; | |
359 | ||
2b77f67e LP |
360 | /* Chomp off trailing whitespace from value */ |
361 | if (last_value_whitespace != (size_t) -1) | |
362 | value[last_value_whitespace] = 0; | |
f73141d7 | 363 | |
ebc05a09 | 364 | /* strip trailing whitespace from key */ |
2b77f67e LP |
365 | if (last_key_whitespace != (size_t) -1) |
366 | key[last_key_whitespace] = 0; | |
ebc05a09 | 367 | |
a5f6c30d | 368 | r = push(fname, line, key, value, userdata, n_pushed); |
f73141d7 LP |
369 | if (r < 0) |
370 | goto fail; | |
371 | ||
372 | n_key = 0; | |
373 | value = NULL; | |
374 | value_alloc = n_value = 0; | |
2b77f67e | 375 | |
f73141d7 LP |
376 | } else if (c == '\\') { |
377 | state = VALUE_ESCAPE; | |
2b77f67e | 378 | last_value_whitespace = (size_t) -1; |
f73141d7 LP |
379 | } else { |
380 | if (!strchr(WHITESPACE, c)) | |
2b77f67e LP |
381 | last_value_whitespace = (size_t) -1; |
382 | else if (last_value_whitespace == (size_t) -1) | |
383 | last_value_whitespace = n_value; | |
f73141d7 | 384 | |
ca2d3784 | 385 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
386 | r = -ENOMEM; |
387 | goto fail; | |
388 | } | |
389 | ||
390 | value[n_value++] = c; | |
391 | } | |
392 | ||
393 | break; | |
394 | ||
395 | case VALUE_ESCAPE: | |
396 | state = VALUE; | |
397 | ||
398 | if (!strchr(newline, c)) { | |
399 | /* Escaped newlines we eat up entirely */ | |
ca2d3784 | 400 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
401 | r = -ENOMEM; |
402 | goto fail; | |
403 | } | |
404 | ||
405 | value[n_value++] = c; | |
406 | } | |
407 | break; | |
408 | ||
409 | case SINGLE_QUOTE_VALUE: | |
410 | if (c == '\'') | |
411 | state = PRE_VALUE; | |
412 | else if (c == '\\') | |
413 | state = SINGLE_QUOTE_VALUE_ESCAPE; | |
414 | else { | |
ca2d3784 | 415 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
416 | r = -ENOMEM; |
417 | goto fail; | |
418 | } | |
a5c32cff | 419 | |
f73141d7 LP |
420 | value[n_value++] = c; |
421 | } | |
a5c32cff | 422 | |
f73141d7 | 423 | break; |
a5c32cff | 424 | |
f73141d7 LP |
425 | case SINGLE_QUOTE_VALUE_ESCAPE: |
426 | state = SINGLE_QUOTE_VALUE; | |
a5c32cff | 427 | |
f73141d7 | 428 | if (!strchr(newline, c)) { |
ca2d3784 | 429 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
a5c32cff | 430 | r = -ENOMEM; |
a5c32cff HH |
431 | goto fail; |
432 | } | |
433 | ||
f73141d7 LP |
434 | value[n_value++] = c; |
435 | } | |
436 | break; | |
437 | ||
438 | case DOUBLE_QUOTE_VALUE: | |
439 | if (c == '\"') | |
440 | state = PRE_VALUE; | |
441 | else if (c == '\\') | |
442 | state = DOUBLE_QUOTE_VALUE_ESCAPE; | |
443 | else { | |
ca2d3784 | 444 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
445 | r = -ENOMEM; |
446 | goto fail; | |
a5c32cff HH |
447 | } |
448 | ||
f73141d7 LP |
449 | value[n_value++] = c; |
450 | } | |
451 | ||
452 | break; | |
453 | ||
454 | case DOUBLE_QUOTE_VALUE_ESCAPE: | |
455 | state = DOUBLE_QUOTE_VALUE; | |
a5c32cff | 456 | |
f73141d7 | 457 | if (!strchr(newline, c)) { |
ca2d3784 | 458 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
459 | r = -ENOMEM; |
460 | goto fail; | |
461 | } | |
a5c32cff | 462 | |
f73141d7 | 463 | value[n_value++] = c; |
a5c32cff | 464 | } |
f73141d7 LP |
465 | break; |
466 | ||
467 | case COMMENT: | |
468 | if (c == '\\') | |
469 | state = COMMENT_ESCAPE; | |
335c46b5 | 470 | else if (strchr(newline, c)) { |
f73141d7 | 471 | state = PRE_KEY; |
335c46b5 ZJS |
472 | line ++; |
473 | } | |
f73141d7 LP |
474 | break; |
475 | ||
476 | case COMMENT_ESCAPE: | |
477 | state = COMMENT; | |
478 | break; | |
a5c32cff | 479 | } |
f73141d7 LP |
480 | } |
481 | ||
482 | if (state == PRE_VALUE || | |
483 | state == VALUE || | |
484 | state == VALUE_ESCAPE || | |
485 | state == SINGLE_QUOTE_VALUE || | |
486 | state == SINGLE_QUOTE_VALUE_ESCAPE || | |
487 | state == DOUBLE_QUOTE_VALUE || | |
488 | state == DOUBLE_QUOTE_VALUE_ESCAPE) { | |
a5c32cff | 489 | |
f73141d7 LP |
490 | key[n_key] = 0; |
491 | ||
492 | if (value) | |
493 | value[n_value] = 0; | |
494 | ||
2b77f67e LP |
495 | if (state == VALUE) |
496 | if (last_value_whitespace != (size_t) -1) | |
497 | value[last_value_whitespace] = 0; | |
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 LP |
504 | if (r < 0) |
505 | goto fail; | |
a5c32cff HH |
506 | } |
507 | ||
f73141d7 LP |
508 | return 0; |
509 | ||
a5c32cff | 510 | fail: |
f73141d7 | 511 | free(value); |
a5c32cff HH |
512 | return r; |
513 | } | |
514 | ||
717603e3 LP |
515 | static int parse_env_file_push( |
516 | const char *filename, unsigned line, | |
517 | const char *key, char *value, | |
a5f6c30d MS |
518 | void *userdata, |
519 | int *n_pushed) { | |
335c46b5 | 520 | |
f27f0e21 GB |
521 | const char *k; |
522 | va_list aq, *ap = userdata; | |
523 | ||
524 | if (!utf8_is_valid(key)) { | |
717603e3 | 525 | _cleanup_free_ char *p; |
550a40ec | 526 | |
717603e3 LP |
527 | p = utf8_escape_invalid(key); |
528 | log_error("%s:%u: invalid UTF-8 in key '%s', ignoring.", strna(filename), line, p); | |
f27f0e21 GB |
529 | return -EINVAL; |
530 | } | |
531 | ||
532 | if (value && !utf8_is_valid(value)) { | |
717603e3 | 533 | _cleanup_free_ char *p; |
550a40ec | 534 | |
717603e3 LP |
535 | p = utf8_escape_invalid(value); |
536 | log_error("%s:%u: invalid UTF-8 value for key %s: '%s', ignoring.", strna(filename), line, key, p); | |
f27f0e21 GB |
537 | return -EINVAL; |
538 | } | |
a5c32cff | 539 | |
f27f0e21 | 540 | va_copy(aq, *ap); |
a5c32cff | 541 | |
f27f0e21 GB |
542 | while ((k = va_arg(aq, const char *))) { |
543 | char **v; | |
a5c32cff | 544 | |
f27f0e21 | 545 | v = va_arg(aq, char **); |
a5c32cff | 546 | |
f27f0e21 GB |
547 | if (streq(key, k)) { |
548 | va_end(aq); | |
549 | free(*v); | |
550 | *v = value; | |
a5f6c30d MS |
551 | |
552 | if (n_pushed) | |
553 | (*n_pushed)++; | |
554 | ||
f27f0e21 | 555 | return 1; |
f73141d7 | 556 | } |
335c46b5 | 557 | } |
a5c32cff | 558 | |
f27f0e21 | 559 | va_end(aq); |
f73141d7 | 560 | free(value); |
717603e3 | 561 | |
f73141d7 LP |
562 | return 0; |
563 | } | |
a5c32cff | 564 | |
f73141d7 LP |
565 | int parse_env_file( |
566 | const char *fname, | |
567 | const char *newline, ...) { | |
a5c32cff | 568 | |
f73141d7 | 569 | va_list ap; |
a5f6c30d | 570 | int r, n_pushed = 0; |
a5c32cff | 571 | |
f73141d7 LP |
572 | if (!newline) |
573 | newline = NEWLINE; | |
a5c32cff | 574 | |
f73141d7 | 575 | va_start(ap, newline); |
a5f6c30d | 576 | r = parse_env_file_internal(NULL, fname, newline, parse_env_file_push, &ap, &n_pushed); |
f73141d7 | 577 | va_end(ap); |
a5c32cff | 578 | |
a5f6c30d | 579 | return r < 0 ? r : n_pushed; |
f73141d7 | 580 | } |
a5c32cff | 581 | |
717603e3 LP |
582 | static int load_env_file_push( |
583 | const char *filename, unsigned line, | |
584 | const char *key, char *value, | |
a5f6c30d MS |
585 | void *userdata, |
586 | int *n_pushed) { | |
f27f0e21 GB |
587 | char ***m = userdata; |
588 | char *p; | |
589 | int r; | |
a5c32cff | 590 | |
f27f0e21 | 591 | if (!utf8_is_valid(key)) { |
b5d74213 ZJS |
592 | _cleanup_free_ char *t = utf8_escape_invalid(key); |
593 | ||
717603e3 | 594 | log_error("%s:%u: invalid UTF-8 for key '%s', ignoring.", strna(filename), line, t); |
f27f0e21 GB |
595 | return -EINVAL; |
596 | } | |
597 | ||
598 | if (value && !utf8_is_valid(value)) { | |
b5d74213 ZJS |
599 | _cleanup_free_ char *t = utf8_escape_invalid(value); |
600 | ||
717603e3 | 601 | log_error("%s:%u: invalid UTF-8 value for key %s: '%s', ignoring.", strna(filename), line, key, t); |
f27f0e21 GB |
602 | return -EINVAL; |
603 | } | |
a5c32cff | 604 | |
f27f0e21 GB |
605 | p = strjoin(key, "=", strempty(value), NULL); |
606 | if (!p) | |
607 | return -ENOMEM; | |
335c46b5 | 608 | |
6e18964d ZJS |
609 | r = strv_consume(m, p); |
610 | if (r < 0) | |
f27f0e21 | 611 | return r; |
a5c32cff | 612 | |
a5f6c30d MS |
613 | if (n_pushed) |
614 | (*n_pushed)++; | |
615 | ||
f73141d7 LP |
616 | free(value); |
617 | return 0; | |
618 | } | |
619 | ||
717603e3 LP |
620 | int load_env_file(FILE *f, const char *fname, const char *newline, char ***rl) { |
621 | char **m = NULL; | |
622 | int r; | |
623 | ||
624 | if (!newline) | |
625 | newline = NEWLINE; | |
626 | ||
a5f6c30d | 627 | r = parse_env_file_internal(f, fname, newline, load_env_file_push, &m, NULL); |
717603e3 LP |
628 | if (r < 0) { |
629 | strv_free(m); | |
630 | return r; | |
631 | } | |
632 | ||
633 | *rl = m; | |
634 | return 0; | |
635 | } | |
636 | ||
637 | static int load_env_file_push_pairs( | |
638 | const char *filename, unsigned line, | |
639 | const char *key, char *value, | |
a5f6c30d MS |
640 | void *userdata, |
641 | int *n_pushed) { | |
717603e3 LP |
642 | char ***m = userdata; |
643 | int r; | |
644 | ||
645 | if (!utf8_is_valid(key)) { | |
646 | _cleanup_free_ char *t = utf8_escape_invalid(key); | |
647 | ||
648 | log_error("%s:%u: invalid UTF-8 for key '%s', ignoring.", strna(filename), line, t); | |
649 | return -EINVAL; | |
650 | } | |
651 | ||
652 | if (value && !utf8_is_valid(value)) { | |
653 | _cleanup_free_ char *t = utf8_escape_invalid(value); | |
654 | ||
655 | log_error("%s:%u: invalid UTF-8 value for key %s: '%s', ignoring.", strna(filename), line, key, t); | |
656 | return -EINVAL; | |
657 | } | |
658 | ||
659 | r = strv_extend(m, key); | |
660 | if (r < 0) | |
661 | return -ENOMEM; | |
662 | ||
663 | if (!value) { | |
664 | r = strv_extend(m, ""); | |
665 | if (r < 0) | |
666 | return -ENOMEM; | |
667 | } else { | |
668 | r = strv_push(m, value); | |
669 | if (r < 0) | |
670 | return r; | |
671 | } | |
672 | ||
a5f6c30d MS |
673 | if (n_pushed) |
674 | (*n_pushed)++; | |
675 | ||
717603e3 LP |
676 | return 0; |
677 | } | |
678 | ||
679 | int load_env_file_pairs(FILE *f, const char *fname, const char *newline, char ***rl) { | |
f73141d7 LP |
680 | char **m = NULL; |
681 | int r; | |
a5c32cff | 682 | |
f73141d7 LP |
683 | if (!newline) |
684 | newline = NEWLINE; | |
685 | ||
a5f6c30d | 686 | r = parse_env_file_internal(f, fname, newline, load_env_file_push_pairs, &m, NULL); |
f73141d7 LP |
687 | if (r < 0) { |
688 | strv_free(m); | |
689 | return r; | |
a5c32cff HH |
690 | } |
691 | ||
692 | *rl = m; | |
a5c32cff HH |
693 | return 0; |
694 | } | |
695 | ||
768100ef LP |
696 | static void write_env_var(FILE *f, const char *v) { |
697 | const char *p; | |
698 | ||
699 | p = strchr(v, '='); | |
700 | if (!p) { | |
701 | /* Fallback */ | |
702 | fputs(v, f); | |
703 | fputc('\n', f); | |
704 | return; | |
705 | } | |
706 | ||
707 | p++; | |
708 | fwrite(v, 1, p-v, f); | |
709 | ||
0ce5a806 | 710 | if (string_has_cc(p, NULL) || chars_intersect(p, WHITESPACE SHELL_NEED_QUOTES)) { |
768100ef LP |
711 | fputc('\"', f); |
712 | ||
713 | for (; *p; p++) { | |
0ce5a806 | 714 | if (strchr(SHELL_NEED_ESCAPE, *p)) |
768100ef LP |
715 | fputc('\\', f); |
716 | ||
717 | fputc(*p, f); | |
718 | } | |
719 | ||
720 | fputc('\"', f); | |
721 | } else | |
722 | fputs(p, f); | |
723 | ||
724 | fputc('\n', f); | |
725 | } | |
726 | ||
a5c32cff | 727 | int write_env_file(const char *fname, char **l) { |
7fd1b19b | 728 | _cleanup_fclose_ FILE *f = NULL; |
736937e5 LP |
729 | _cleanup_free_ char *p = NULL; |
730 | char **i; | |
a5c32cff HH |
731 | int r; |
732 | ||
736937e5 LP |
733 | assert(fname); |
734 | ||
a5c32cff HH |
735 | r = fopen_temporary(fname, &f, &p); |
736 | if (r < 0) | |
737 | return r; | |
738 | ||
739 | fchmod_umask(fileno(f), 0644); | |
740 | ||
768100ef LP |
741 | STRV_FOREACH(i, l) |
742 | write_env_var(f, *i); | |
a5c32cff | 743 | |
736937e5 LP |
744 | r = fflush_and_check(f); |
745 | if (r >= 0) { | |
746 | if (rename(p, fname) >= 0) | |
747 | return 0; | |
a5c32cff | 748 | |
736937e5 | 749 | r = -errno; |
a5c32cff HH |
750 | } |
751 | ||
736937e5 | 752 | unlink(p); |
a5c32cff HH |
753 | return r; |
754 | } | |
68fee104 ZJS |
755 | |
756 | int executable_is_script(const char *path, char **interpreter) { | |
757 | int r; | |
c8b32e11 | 758 | _cleanup_free_ char *line = NULL; |
68fee104 ZJS |
759 | int len; |
760 | char *ans; | |
761 | ||
762 | assert(path); | |
763 | ||
764 | r = read_one_line_file(path, &line); | |
765 | if (r < 0) | |
766 | return r; | |
767 | ||
768 | if (!startswith(line, "#!")) | |
769 | return 0; | |
770 | ||
771 | ans = strstrip(line + 2); | |
772 | len = strcspn(ans, " \t"); | |
773 | ||
774 | if (len == 0) | |
775 | return 0; | |
776 | ||
777 | ans = strndup(ans, len); | |
778 | if (!ans) | |
779 | return -ENOMEM; | |
780 | ||
781 | *interpreter = ans; | |
782 | return 1; | |
783 | } | |
69ab8088 ZJS |
784 | |
785 | /** | |
0a7b53bd | 786 | * Retrieve one field from a file like /proc/self/status. pattern |
c4cd1d4d AK |
787 | * should not include whitespace or the delimiter (':'). pattern matches only |
788 | * the beginning of a line. Whitespace before ':' is skipped. Whitespace and | |
789 | * zeros after the ':' will be skipped. field must be freed afterwards. | |
790 | * terminator specifies the terminating characters of the field value (not | |
791 | * included in the value). | |
69ab8088 | 792 | */ |
c4cd1d4d | 793 | int get_proc_field(const char *filename, const char *pattern, const char *terminator, char **field) { |
69ab8088 | 794 | _cleanup_free_ char *status = NULL; |
90110825 | 795 | char *t, *f; |
69ab8088 ZJS |
796 | size_t len; |
797 | int r; | |
798 | ||
c4cd1d4d | 799 | assert(terminator); |
69ab8088 | 800 | assert(filename); |
7ff7394d | 801 | assert(pattern); |
69ab8088 ZJS |
802 | assert(field); |
803 | ||
804 | r = read_full_file(filename, &status, NULL); | |
805 | if (r < 0) | |
806 | return r; | |
807 | ||
c4cd1d4d AK |
808 | t = status; |
809 | ||
810 | do { | |
811 | bool pattern_ok; | |
812 | ||
813 | do { | |
814 | t = strstr(t, pattern); | |
815 | if (!t) | |
816 | return -ENOENT; | |
817 | ||
818 | /* Check that pattern occurs in beginning of line. */ | |
819 | pattern_ok = (t == status || t[-1] == '\n'); | |
820 | ||
821 | t += strlen(pattern); | |
822 | ||
823 | } while (!pattern_ok); | |
824 | ||
825 | t += strspn(t, " \t"); | |
826 | if (!*t) | |
827 | return -ENOENT; | |
828 | ||
829 | } while (*t != ':'); | |
830 | ||
831 | t++; | |
69ab8088 | 832 | |
4ec29144 | 833 | if (*t) { |
1e5413f7 ZJS |
834 | t += strspn(t, " \t"); |
835 | ||
836 | /* Also skip zeros, because when this is used for | |
837 | * capabilities, we don't want the zeros. This way the | |
838 | * same capability set always maps to the same string, | |
839 | * irrespective of the total capability set size. For | |
840 | * other numbers it shouldn't matter. */ | |
841 | t += strspn(t, "0"); | |
4ec29144 ZJS |
842 | /* Back off one char if there's nothing but whitespace |
843 | and zeros */ | |
1e5413f7 | 844 | if (!*t || isspace(*t)) |
4ec29144 ZJS |
845 | t --; |
846 | } | |
69ab8088 | 847 | |
c4cd1d4d | 848 | len = strcspn(t, terminator); |
69ab8088 | 849 | |
90110825 LP |
850 | f = strndup(t, len); |
851 | if (!f) | |
69ab8088 ZJS |
852 | return -ENOMEM; |
853 | ||
90110825 | 854 | *field = f; |
69ab8088 ZJS |
855 | return 0; |
856 | } | |
0d39fa9c LP |
857 | |
858 | DIR *xopendirat(int fd, const char *name, int flags) { | |
859 | int nfd; | |
860 | DIR *d; | |
861 | ||
862 | assert(!(flags & O_CREAT)); | |
863 | ||
864 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
865 | if (nfd < 0) | |
866 | return NULL; | |
867 | ||
868 | d = fdopendir(nfd); | |
869 | if (!d) { | |
870 | safe_close(nfd); | |
871 | return NULL; | |
872 | } | |
873 | ||
874 | return d; | |
875 | } | |
876 | ||
877 | static int search_and_fopen_internal(const char *path, const char *mode, const char *root, char **search, FILE **_f) { | |
878 | char **i; | |
879 | ||
880 | assert(path); | |
881 | assert(mode); | |
882 | assert(_f); | |
883 | ||
884 | if (!path_strv_resolve_uniq(search, root)) | |
885 | return -ENOMEM; | |
886 | ||
887 | STRV_FOREACH(i, search) { | |
888 | _cleanup_free_ char *p = NULL; | |
889 | FILE *f; | |
890 | ||
891 | if (root) | |
892 | p = strjoin(root, *i, "/", path, NULL); | |
893 | else | |
894 | p = strjoin(*i, "/", path, NULL); | |
895 | if (!p) | |
896 | return -ENOMEM; | |
897 | ||
898 | f = fopen(p, mode); | |
899 | if (f) { | |
900 | *_f = f; | |
901 | return 0; | |
902 | } | |
903 | ||
904 | if (errno != ENOENT) | |
905 | return -errno; | |
906 | } | |
907 | ||
908 | return -ENOENT; | |
909 | } | |
910 | ||
911 | int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f) { | |
912 | _cleanup_strv_free_ char **copy = NULL; | |
913 | ||
914 | assert(path); | |
915 | assert(mode); | |
916 | assert(_f); | |
917 | ||
918 | if (path_is_absolute(path)) { | |
919 | FILE *f; | |
920 | ||
921 | f = fopen(path, mode); | |
922 | if (f) { | |
923 | *_f = f; | |
924 | return 0; | |
925 | } | |
926 | ||
927 | return -errno; | |
928 | } | |
929 | ||
930 | copy = strv_copy((char**) search); | |
931 | if (!copy) | |
932 | return -ENOMEM; | |
933 | ||
934 | return search_and_fopen_internal(path, mode, root, copy, _f); | |
935 | } | |
936 | ||
937 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f) { | |
938 | _cleanup_strv_free_ char **s = NULL; | |
939 | ||
940 | if (path_is_absolute(path)) { | |
941 | FILE *f; | |
942 | ||
943 | f = fopen(path, mode); | |
944 | if (f) { | |
945 | *_f = f; | |
946 | return 0; | |
947 | } | |
948 | ||
949 | return -errno; | |
950 | } | |
951 | ||
952 | s = strv_split_nulstr(search); | |
953 | if (!s) | |
954 | return -ENOMEM; | |
955 | ||
956 | return search_and_fopen_internal(path, mode, root, s, _f); | |
957 | } | |
958 | ||
959 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { | |
960 | FILE *f; | |
961 | char *t; | |
962 | int r, fd; | |
963 | ||
964 | assert(path); | |
965 | assert(_f); | |
966 | assert(_temp_path); | |
967 | ||
968 | r = tempfn_xxxxxx(path, NULL, &t); | |
969 | if (r < 0) | |
970 | return r; | |
971 | ||
972 | fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC); | |
973 | if (fd < 0) { | |
974 | free(t); | |
975 | return -errno; | |
976 | } | |
977 | ||
978 | f = fdopen(fd, "we"); | |
979 | if (!f) { | |
980 | unlink_noerrno(t); | |
981 | free(t); | |
982 | safe_close(fd); | |
983 | return -errno; | |
984 | } | |
985 | ||
986 | *_f = f; | |
987 | *_temp_path = t; | |
988 | ||
989 | return 0; | |
990 | } | |
991 | ||
992 | int fflush_and_check(FILE *f) { | |
993 | assert(f); | |
994 | ||
995 | errno = 0; | |
996 | fflush(f); | |
997 | ||
998 | if (ferror(f)) | |
999 | return errno ? -errno : -EIO; | |
1000 | ||
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | /* This is much like like mkostemp() but is subject to umask(). */ | |
1005 | int mkostemp_safe(char *pattern, int flags) { | |
1006 | _cleanup_umask_ mode_t u; | |
1007 | int fd; | |
1008 | ||
1009 | assert(pattern); | |
1010 | ||
1011 | u = umask(077); | |
1012 | ||
1013 | fd = mkostemp(pattern, flags); | |
1014 | if (fd < 0) | |
1015 | return -errno; | |
1016 | ||
1017 | return fd; | |
1018 | } | |
1019 | ||
1020 | int open_tmpfile(const char *path, int flags) { | |
1021 | char *p; | |
1022 | int fd; | |
1023 | ||
1024 | assert(path); | |
1025 | ||
1026 | #ifdef O_TMPFILE | |
1027 | /* Try O_TMPFILE first, if it is supported */ | |
1028 | fd = open(path, flags|O_TMPFILE|O_EXCL, S_IRUSR|S_IWUSR); | |
1029 | if (fd >= 0) | |
1030 | return fd; | |
1031 | #endif | |
1032 | ||
1033 | /* Fall back to unguessable name + unlinking */ | |
1034 | p = strjoina(path, "/systemd-tmp-XXXXXX"); | |
1035 | ||
1036 | fd = mkostemp_safe(p, flags); | |
1037 | if (fd < 0) | |
1038 | return fd; | |
1039 | ||
1040 | unlink(p); | |
1041 | return fd; | |
1042 | } | |
1043 | ||
1044 | int tempfn_xxxxxx(const char *p, const char *extra, char **ret) { | |
1045 | const char *fn; | |
1046 | char *t; | |
1047 | ||
1048 | assert(p); | |
1049 | assert(ret); | |
1050 | ||
1051 | /* | |
1052 | * Turns this: | |
1053 | * /foo/bar/waldo | |
1054 | * | |
1055 | * Into this: | |
1056 | * /foo/bar/.#<extra>waldoXXXXXX | |
1057 | */ | |
1058 | ||
1059 | fn = basename(p); | |
1060 | if (!filename_is_valid(fn)) | |
1061 | return -EINVAL; | |
1062 | ||
1063 | if (extra == NULL) | |
1064 | extra = ""; | |
1065 | ||
1066 | t = new(char, strlen(p) + 2 + strlen(extra) + 6 + 1); | |
1067 | if (!t) | |
1068 | return -ENOMEM; | |
1069 | ||
1070 | strcpy(stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn), "XXXXXX"); | |
1071 | ||
1072 | *ret = path_kill_slashes(t); | |
1073 | return 0; | |
1074 | } | |
1075 | ||
1076 | int tempfn_random(const char *p, const char *extra, char **ret) { | |
1077 | const char *fn; | |
1078 | char *t, *x; | |
1079 | uint64_t u; | |
1080 | unsigned i; | |
1081 | ||
1082 | assert(p); | |
1083 | assert(ret); | |
1084 | ||
1085 | /* | |
1086 | * Turns this: | |
1087 | * /foo/bar/waldo | |
1088 | * | |
1089 | * Into this: | |
1090 | * /foo/bar/.#<extra>waldobaa2a261115984a9 | |
1091 | */ | |
1092 | ||
1093 | fn = basename(p); | |
1094 | if (!filename_is_valid(fn)) | |
1095 | return -EINVAL; | |
1096 | ||
1097 | if (!extra) | |
1098 | extra = ""; | |
1099 | ||
1100 | t = new(char, strlen(p) + 2 + strlen(extra) + 16 + 1); | |
1101 | if (!t) | |
1102 | return -ENOMEM; | |
1103 | ||
1104 | x = stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn); | |
1105 | ||
1106 | u = random_u64(); | |
1107 | for (i = 0; i < 16; i++) { | |
1108 | *(x++) = hexchar(u & 0xF); | |
1109 | u >>= 4; | |
1110 | } | |
1111 | ||
1112 | *x = 0; | |
1113 | ||
1114 | *ret = path_kill_slashes(t); | |
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | int tempfn_random_child(const char *p, const char *extra, char **ret) { | |
1119 | char *t, *x; | |
1120 | uint64_t u; | |
1121 | unsigned i; | |
1122 | ||
1123 | assert(p); | |
1124 | assert(ret); | |
1125 | ||
1126 | /* Turns this: | |
1127 | * /foo/bar/waldo | |
1128 | * Into this: | |
1129 | * /foo/bar/waldo/.#<extra>3c2b6219aa75d7d0 | |
1130 | */ | |
1131 | ||
1132 | if (!extra) | |
1133 | extra = ""; | |
1134 | ||
1135 | t = new(char, strlen(p) + 3 + strlen(extra) + 16 + 1); | |
1136 | if (!t) | |
1137 | return -ENOMEM; | |
1138 | ||
1139 | x = stpcpy(stpcpy(stpcpy(t, p), "/.#"), extra); | |
1140 | ||
1141 | u = random_u64(); | |
1142 | for (i = 0; i < 16; i++) { | |
1143 | *(x++) = hexchar(u & 0xF); | |
1144 | u >>= 4; | |
1145 | } | |
1146 | ||
1147 | *x = 0; | |
1148 | ||
1149 | *ret = path_kill_slashes(t); | |
1150 | return 0; | |
1151 | } |