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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 | |
4f5dd394 LP |
24 | #include "ctype.h" |
25 | #include "escape.h" | |
3ffd4af2 LP |
26 | #include "fd-util.h" |
27 | #include "fileio.h" | |
f4f15635 | 28 | #include "fs-util.h" |
0d39fa9c LP |
29 | #include "hexdecoct.h" |
30 | #include "path-util.h" | |
31 | #include "random-util.h" | |
07630cea | 32 | #include "string-util.h" |
a5c32cff | 33 | #include "strv.h" |
affb60b1 | 34 | #include "umask-util.h" |
335c46b5 | 35 | #include "utf8.h" |
4f5dd394 | 36 | #include "util.h" |
a5c32cff | 37 | |
40beecdb | 38 | int write_string_stream(FILE *f, const char *line, bool enforce_newline) { |
dacd6cee | 39 | |
717603e3 LP |
40 | assert(f); |
41 | assert(line); | |
42 | ||
fec6fc6b | 43 | fputs(line, f); |
40beecdb | 44 | if (enforce_newline && !endswith(line, "\n")) |
a5c32cff HH |
45 | fputc('\n', f); |
46 | ||
dacd6cee | 47 | return fflush_and_check(f); |
a5c32cff HH |
48 | } |
49 | ||
4c1fc3e4 | 50 | static int write_string_file_atomic(const char *fn, const char *line, bool enforce_newline) { |
a5c32cff HH |
51 | _cleanup_fclose_ FILE *f = NULL; |
52 | _cleanup_free_ char *p = NULL; | |
53 | int r; | |
54 | ||
55 | assert(fn); | |
56 | assert(line); | |
57 | ||
58 | r = fopen_temporary(fn, &f, &p); | |
59 | if (r < 0) | |
60 | return r; | |
61 | ||
0d39fa9c | 62 | (void) fchmod_umask(fileno(f), 0644); |
a5c32cff | 63 | |
4c1fc3e4 | 64 | r = write_string_stream(f, line, enforce_newline); |
f2997962 | 65 | if (r >= 0) { |
a5c32cff HH |
66 | if (rename(p, fn) < 0) |
67 | r = -errno; | |
a5c32cff HH |
68 | } |
69 | ||
a5c32cff | 70 | if (r < 0) |
0d39fa9c | 71 | (void) unlink(p); |
a5c32cff HH |
72 | |
73 | return r; | |
74 | } | |
75 | ||
4c1fc3e4 DM |
76 | int write_string_file(const char *fn, const char *line, WriteStringFileFlags flags) { |
77 | _cleanup_fclose_ FILE *f = NULL; | |
78 | ||
79 | assert(fn); | |
80 | assert(line); | |
81 | ||
82 | if (flags & WRITE_STRING_FILE_ATOMIC) { | |
83 | assert(flags & WRITE_STRING_FILE_CREATE); | |
84 | ||
85 | return write_string_file_atomic(fn, line, !(flags & WRITE_STRING_FILE_AVOID_NEWLINE)); | |
86 | } | |
87 | ||
88 | if (flags & WRITE_STRING_FILE_CREATE) { | |
89 | f = fopen(fn, "we"); | |
90 | if (!f) | |
91 | return -errno; | |
92 | } else { | |
93 | int fd; | |
94 | ||
95 | /* We manually build our own version of fopen(..., "we") that | |
96 | * works without O_CREAT */ | |
97 | fd = open(fn, O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
98 | if (fd < 0) | |
99 | return -errno; | |
100 | ||
101 | f = fdopen(fd, "we"); | |
102 | if (!f) { | |
103 | safe_close(fd); | |
104 | return -errno; | |
105 | } | |
106 | } | |
107 | ||
108 | return write_string_stream(f, line, !(flags & WRITE_STRING_FILE_AVOID_NEWLINE)); | |
109 | } | |
110 | ||
a5c32cff HH |
111 | int read_one_line_file(const char *fn, char **line) { |
112 | _cleanup_fclose_ FILE *f = NULL; | |
113 | char t[LINE_MAX], *c; | |
114 | ||
115 | assert(fn); | |
116 | assert(line); | |
117 | ||
118 | f = fopen(fn, "re"); | |
119 | if (!f) | |
120 | return -errno; | |
121 | ||
122 | if (!fgets(t, sizeof(t), f)) { | |
123 | ||
124 | if (ferror(f)) | |
125 | return errno ? -errno : -EIO; | |
126 | ||
127 | t[0] = 0; | |
128 | } | |
129 | ||
130 | c = strdup(t); | |
131 | if (!c) | |
132 | return -ENOMEM; | |
133 | truncate_nl(c); | |
134 | ||
135 | *line = c; | |
136 | return 0; | |
137 | } | |
138 | ||
15dee3f0 LP |
139 | int verify_one_line_file(const char *fn, const char *line) { |
140 | _cleanup_free_ char *value = NULL; | |
141 | int r; | |
142 | ||
143 | r = read_one_line_file(fn, &value); | |
144 | if (r < 0) | |
145 | return r; | |
146 | ||
147 | return streq(value, line); | |
148 | } | |
149 | ||
717603e3 | 150 | int read_full_stream(FILE *f, char **contents, size_t *size) { |
a5c32cff HH |
151 | size_t n, l; |
152 | _cleanup_free_ char *buf = NULL; | |
153 | struct stat st; | |
154 | ||
717603e3 | 155 | assert(f); |
a5c32cff HH |
156 | assert(contents); |
157 | ||
a5c32cff HH |
158 | if (fstat(fileno(f), &st) < 0) |
159 | return -errno; | |
160 | ||
717603e3 | 161 | n = LINE_MAX; |
a5c32cff | 162 | |
717603e3 LP |
163 | if (S_ISREG(st.st_mode)) { |
164 | ||
165 | /* Safety check */ | |
166 | if (st.st_size > 4*1024*1024) | |
167 | return -E2BIG; | |
168 | ||
169 | /* Start with the right file size, but be prepared for | |
170 | * files from /proc which generally report a file size | |
171 | * of 0 */ | |
172 | if (st.st_size > 0) | |
173 | n = st.st_size; | |
174 | } | |
a5c32cff | 175 | |
717603e3 | 176 | l = 0; |
a5c32cff HH |
177 | for (;;) { |
178 | char *t; | |
179 | size_t k; | |
180 | ||
181 | t = realloc(buf, n+1); | |
182 | if (!t) | |
183 | return -ENOMEM; | |
184 | ||
185 | buf = t; | |
186 | k = fread(buf + l, 1, n - l, f); | |
187 | ||
188 | if (k <= 0) { | |
189 | if (ferror(f)) | |
190 | return -errno; | |
191 | ||
192 | break; | |
193 | } | |
194 | ||
195 | l += k; | |
196 | n *= 2; | |
197 | ||
198 | /* Safety check */ | |
199 | if (n > 4*1024*1024) | |
200 | return -E2BIG; | |
201 | } | |
202 | ||
203 | buf[l] = 0; | |
204 | *contents = buf; | |
d78a28e3 | 205 | buf = NULL; /* do not free */ |
a5c32cff HH |
206 | |
207 | if (size) | |
208 | *size = l; | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
717603e3 LP |
213 | int read_full_file(const char *fn, char **contents, size_t *size) { |
214 | _cleanup_fclose_ FILE *f = NULL; | |
215 | ||
216 | assert(fn); | |
217 | assert(contents); | |
218 | ||
219 | f = fopen(fn, "re"); | |
220 | if (!f) | |
221 | return -errno; | |
222 | ||
223 | return read_full_stream(f, contents, size); | |
224 | } | |
225 | ||
f73141d7 | 226 | static int parse_env_file_internal( |
717603e3 | 227 | FILE *f, |
a5c32cff | 228 | const char *fname, |
f73141d7 | 229 | const char *newline, |
335c46b5 | 230 | int (*push) (const char *filename, unsigned line, |
a5f6c30d MS |
231 | const char *key, char *value, void *userdata, int *n_pushed), |
232 | void *userdata, | |
233 | int *n_pushed) { | |
f73141d7 LP |
234 | |
235 | _cleanup_free_ char *contents = NULL, *key = NULL; | |
2b77f67e | 236 | 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 |
237 | char *p, *value = NULL; |
238 | int r; | |
335c46b5 | 239 | unsigned line = 1; |
a5c32cff | 240 | |
f73141d7 LP |
241 | enum { |
242 | PRE_KEY, | |
243 | KEY, | |
f73141d7 LP |
244 | PRE_VALUE, |
245 | VALUE, | |
246 | VALUE_ESCAPE, | |
247 | SINGLE_QUOTE_VALUE, | |
248 | SINGLE_QUOTE_VALUE_ESCAPE, | |
249 | DOUBLE_QUOTE_VALUE, | |
250 | DOUBLE_QUOTE_VALUE_ESCAPE, | |
251 | COMMENT, | |
252 | COMMENT_ESCAPE | |
253 | } state = PRE_KEY; | |
a5c32cff | 254 | |
f73141d7 | 255 | assert(newline); |
a5c32cff | 256 | |
717603e3 LP |
257 | if (f) |
258 | r = read_full_stream(f, &contents, NULL); | |
259 | else | |
260 | r = read_full_file(fname, &contents, NULL); | |
1c17cbed | 261 | if (r < 0) |
a5c32cff HH |
262 | return r; |
263 | ||
f73141d7 LP |
264 | for (p = contents; *p; p++) { |
265 | char c = *p; | |
266 | ||
267 | switch (state) { | |
268 | ||
269 | case PRE_KEY: | |
ebc05a09 | 270 | if (strchr(COMMENTS, c)) |
f73141d7 LP |
271 | state = COMMENT; |
272 | else if (!strchr(WHITESPACE, c)) { | |
273 | state = KEY; | |
2b77f67e LP |
274 | last_key_whitespace = (size_t) -1; |
275 | ||
ca2d3784 | 276 | if (!GREEDY_REALLOC(key, key_alloc, n_key+2)) { |
f73141d7 LP |
277 | r = -ENOMEM; |
278 | goto fail; | |
279 | } | |
280 | ||
281 | key[n_key++] = c; | |
282 | } | |
283 | break; | |
284 | ||
285 | case KEY: | |
286 | if (strchr(newline, c)) { | |
287 | state = PRE_KEY; | |
335c46b5 | 288 | line ++; |
f73141d7 | 289 | n_key = 0; |
2b77f67e | 290 | } else if (c == '=') { |
f73141d7 | 291 | state = PRE_VALUE; |
2b77f67e LP |
292 | last_value_whitespace = (size_t) -1; |
293 | } else { | |
294 | if (!strchr(WHITESPACE, c)) | |
295 | last_key_whitespace = (size_t) -1; | |
296 | else if (last_key_whitespace == (size_t) -1) | |
297 | last_key_whitespace = n_key; | |
298 | ||
ca2d3784 | 299 | if (!GREEDY_REALLOC(key, key_alloc, n_key+2)) { |
f73141d7 LP |
300 | r = -ENOMEM; |
301 | goto fail; | |
302 | } | |
303 | ||
304 | key[n_key++] = c; | |
305 | } | |
a5c32cff | 306 | |
f73141d7 LP |
307 | break; |
308 | ||
f73141d7 | 309 | case PRE_VALUE: |
98f59e59 | 310 | if (strchr(newline, c)) { |
f73141d7 | 311 | state = PRE_KEY; |
335c46b5 | 312 | line ++; |
f73141d7 | 313 | key[n_key] = 0; |
a5c32cff | 314 | |
f73141d7 LP |
315 | if (value) |
316 | value[n_value] = 0; | |
a5c32cff | 317 | |
ebc05a09 | 318 | /* strip trailing whitespace from key */ |
2b77f67e LP |
319 | if (last_key_whitespace != (size_t) -1) |
320 | key[last_key_whitespace] = 0; | |
ebc05a09 | 321 | |
a5f6c30d | 322 | r = push(fname, line, key, value, userdata, n_pushed); |
f73141d7 LP |
323 | if (r < 0) |
324 | goto fail; | |
325 | ||
326 | n_key = 0; | |
327 | value = NULL; | |
328 | value_alloc = n_value = 0; | |
2b77f67e | 329 | |
f73141d7 LP |
330 | } else if (c == '\'') |
331 | state = SINGLE_QUOTE_VALUE; | |
332 | else if (c == '\"') | |
333 | state = DOUBLE_QUOTE_VALUE; | |
334 | else if (c == '\\') | |
335 | state = VALUE_ESCAPE; | |
336 | else if (!strchr(WHITESPACE, c)) { | |
337 | state = VALUE; | |
338 | ||
ca2d3784 | 339 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
340 | r = -ENOMEM; |
341 | goto fail; | |
342 | } | |
343 | ||
344 | value[n_value++] = c; | |
345 | } | |
346 | ||
347 | break; | |
348 | ||
349 | case VALUE: | |
350 | if (strchr(newline, c)) { | |
351 | state = PRE_KEY; | |
335c46b5 | 352 | line ++; |
98f59e59 | 353 | |
f73141d7 LP |
354 | key[n_key] = 0; |
355 | ||
356 | if (value) | |
357 | value[n_value] = 0; | |
358 | ||
2b77f67e LP |
359 | /* Chomp off trailing whitespace from value */ |
360 | if (last_value_whitespace != (size_t) -1) | |
361 | value[last_value_whitespace] = 0; | |
f73141d7 | 362 | |
ebc05a09 | 363 | /* strip trailing whitespace from key */ |
2b77f67e LP |
364 | if (last_key_whitespace != (size_t) -1) |
365 | key[last_key_whitespace] = 0; | |
ebc05a09 | 366 | |
a5f6c30d | 367 | r = push(fname, line, key, value, userdata, n_pushed); |
f73141d7 LP |
368 | if (r < 0) |
369 | goto fail; | |
370 | ||
371 | n_key = 0; | |
372 | value = NULL; | |
373 | value_alloc = n_value = 0; | |
2b77f67e | 374 | |
f73141d7 LP |
375 | } else if (c == '\\') { |
376 | state = VALUE_ESCAPE; | |
2b77f67e | 377 | last_value_whitespace = (size_t) -1; |
f73141d7 LP |
378 | } else { |
379 | if (!strchr(WHITESPACE, c)) | |
2b77f67e LP |
380 | last_value_whitespace = (size_t) -1; |
381 | else if (last_value_whitespace == (size_t) -1) | |
382 | last_value_whitespace = n_value; | |
f73141d7 | 383 | |
ca2d3784 | 384 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
385 | r = -ENOMEM; |
386 | goto fail; | |
387 | } | |
388 | ||
389 | value[n_value++] = c; | |
390 | } | |
391 | ||
392 | break; | |
393 | ||
394 | case VALUE_ESCAPE: | |
395 | state = VALUE; | |
396 | ||
397 | if (!strchr(newline, c)) { | |
398 | /* Escaped newlines we eat up entirely */ | |
ca2d3784 | 399 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
400 | r = -ENOMEM; |
401 | goto fail; | |
402 | } | |
403 | ||
404 | value[n_value++] = c; | |
405 | } | |
406 | break; | |
407 | ||
408 | case SINGLE_QUOTE_VALUE: | |
409 | if (c == '\'') | |
410 | state = PRE_VALUE; | |
411 | else if (c == '\\') | |
412 | state = SINGLE_QUOTE_VALUE_ESCAPE; | |
413 | else { | |
ca2d3784 | 414 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
415 | r = -ENOMEM; |
416 | goto fail; | |
417 | } | |
a5c32cff | 418 | |
f73141d7 LP |
419 | value[n_value++] = c; |
420 | } | |
a5c32cff | 421 | |
f73141d7 | 422 | break; |
a5c32cff | 423 | |
f73141d7 LP |
424 | case SINGLE_QUOTE_VALUE_ESCAPE: |
425 | state = SINGLE_QUOTE_VALUE; | |
a5c32cff | 426 | |
f73141d7 | 427 | if (!strchr(newline, c)) { |
ca2d3784 | 428 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
a5c32cff | 429 | r = -ENOMEM; |
a5c32cff HH |
430 | goto fail; |
431 | } | |
432 | ||
f73141d7 LP |
433 | value[n_value++] = c; |
434 | } | |
435 | break; | |
436 | ||
437 | case DOUBLE_QUOTE_VALUE: | |
438 | if (c == '\"') | |
439 | state = PRE_VALUE; | |
440 | else if (c == '\\') | |
441 | state = DOUBLE_QUOTE_VALUE_ESCAPE; | |
442 | else { | |
ca2d3784 | 443 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
444 | r = -ENOMEM; |
445 | goto fail; | |
a5c32cff HH |
446 | } |
447 | ||
f73141d7 LP |
448 | value[n_value++] = c; |
449 | } | |
450 | ||
451 | break; | |
452 | ||
453 | case DOUBLE_QUOTE_VALUE_ESCAPE: | |
454 | state = DOUBLE_QUOTE_VALUE; | |
a5c32cff | 455 | |
f73141d7 | 456 | if (!strchr(newline, c)) { |
ca2d3784 | 457 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
458 | r = -ENOMEM; |
459 | goto fail; | |
460 | } | |
a5c32cff | 461 | |
f73141d7 | 462 | value[n_value++] = c; |
a5c32cff | 463 | } |
f73141d7 LP |
464 | break; |
465 | ||
466 | case COMMENT: | |
467 | if (c == '\\') | |
468 | state = COMMENT_ESCAPE; | |
335c46b5 | 469 | else if (strchr(newline, c)) { |
f73141d7 | 470 | state = PRE_KEY; |
335c46b5 ZJS |
471 | line ++; |
472 | } | |
f73141d7 LP |
473 | break; |
474 | ||
475 | case COMMENT_ESCAPE: | |
476 | state = COMMENT; | |
477 | break; | |
a5c32cff | 478 | } |
f73141d7 LP |
479 | } |
480 | ||
481 | if (state == PRE_VALUE || | |
482 | state == VALUE || | |
483 | state == VALUE_ESCAPE || | |
484 | state == SINGLE_QUOTE_VALUE || | |
485 | state == SINGLE_QUOTE_VALUE_ESCAPE || | |
486 | state == DOUBLE_QUOTE_VALUE || | |
487 | state == DOUBLE_QUOTE_VALUE_ESCAPE) { | |
a5c32cff | 488 | |
f73141d7 LP |
489 | key[n_key] = 0; |
490 | ||
491 | if (value) | |
492 | value[n_value] = 0; | |
493 | ||
2b77f67e LP |
494 | if (state == VALUE) |
495 | if (last_value_whitespace != (size_t) -1) | |
496 | value[last_value_whitespace] = 0; | |
497 | ||
ebc05a09 | 498 | /* strip trailing whitespace from key */ |
2b77f67e LP |
499 | if (last_key_whitespace != (size_t) -1) |
500 | key[last_key_whitespace] = 0; | |
ebc05a09 | 501 | |
a5f6c30d | 502 | r = push(fname, line, key, value, userdata, n_pushed); |
f73141d7 LP |
503 | if (r < 0) |
504 | goto fail; | |
a5c32cff HH |
505 | } |
506 | ||
f73141d7 LP |
507 | return 0; |
508 | ||
a5c32cff | 509 | fail: |
f73141d7 | 510 | free(value); |
a5c32cff HH |
511 | return r; |
512 | } | |
513 | ||
717603e3 LP |
514 | static int parse_env_file_push( |
515 | const char *filename, unsigned line, | |
516 | const char *key, char *value, | |
a5f6c30d MS |
517 | void *userdata, |
518 | int *n_pushed) { | |
335c46b5 | 519 | |
f27f0e21 GB |
520 | const char *k; |
521 | va_list aq, *ap = userdata; | |
522 | ||
523 | if (!utf8_is_valid(key)) { | |
717603e3 | 524 | _cleanup_free_ char *p; |
550a40ec | 525 | |
717603e3 LP |
526 | p = utf8_escape_invalid(key); |
527 | log_error("%s:%u: invalid UTF-8 in key '%s', ignoring.", strna(filename), line, p); | |
f27f0e21 GB |
528 | return -EINVAL; |
529 | } | |
530 | ||
531 | if (value && !utf8_is_valid(value)) { | |
717603e3 | 532 | _cleanup_free_ char *p; |
550a40ec | 533 | |
717603e3 LP |
534 | p = utf8_escape_invalid(value); |
535 | log_error("%s:%u: invalid UTF-8 value for key %s: '%s', ignoring.", strna(filename), line, key, p); | |
f27f0e21 GB |
536 | return -EINVAL; |
537 | } | |
a5c32cff | 538 | |
f27f0e21 | 539 | va_copy(aq, *ap); |
a5c32cff | 540 | |
f27f0e21 GB |
541 | while ((k = va_arg(aq, const char *))) { |
542 | char **v; | |
a5c32cff | 543 | |
f27f0e21 | 544 | v = va_arg(aq, char **); |
a5c32cff | 545 | |
f27f0e21 GB |
546 | if (streq(key, k)) { |
547 | va_end(aq); | |
548 | free(*v); | |
549 | *v = value; | |
a5f6c30d MS |
550 | |
551 | if (n_pushed) | |
552 | (*n_pushed)++; | |
553 | ||
f27f0e21 | 554 | return 1; |
f73141d7 | 555 | } |
335c46b5 | 556 | } |
a5c32cff | 557 | |
f27f0e21 | 558 | va_end(aq); |
f73141d7 | 559 | free(value); |
717603e3 | 560 | |
f73141d7 LP |
561 | return 0; |
562 | } | |
a5c32cff | 563 | |
f73141d7 LP |
564 | int parse_env_file( |
565 | const char *fname, | |
566 | const char *newline, ...) { | |
a5c32cff | 567 | |
f73141d7 | 568 | va_list ap; |
a5f6c30d | 569 | int r, n_pushed = 0; |
a5c32cff | 570 | |
f73141d7 LP |
571 | if (!newline) |
572 | newline = NEWLINE; | |
a5c32cff | 573 | |
f73141d7 | 574 | va_start(ap, newline); |
a5f6c30d | 575 | r = parse_env_file_internal(NULL, fname, newline, parse_env_file_push, &ap, &n_pushed); |
f73141d7 | 576 | va_end(ap); |
a5c32cff | 577 | |
a5f6c30d | 578 | return r < 0 ? r : n_pushed; |
f73141d7 | 579 | } |
a5c32cff | 580 | |
717603e3 LP |
581 | static int load_env_file_push( |
582 | const char *filename, unsigned line, | |
583 | const char *key, char *value, | |
a5f6c30d MS |
584 | void *userdata, |
585 | int *n_pushed) { | |
f27f0e21 GB |
586 | char ***m = userdata; |
587 | char *p; | |
588 | int r; | |
a5c32cff | 589 | |
f27f0e21 | 590 | if (!utf8_is_valid(key)) { |
b5d74213 ZJS |
591 | _cleanup_free_ char *t = utf8_escape_invalid(key); |
592 | ||
717603e3 | 593 | log_error("%s:%u: invalid UTF-8 for key '%s', ignoring.", strna(filename), line, t); |
f27f0e21 GB |
594 | return -EINVAL; |
595 | } | |
596 | ||
597 | if (value && !utf8_is_valid(value)) { | |
b5d74213 ZJS |
598 | _cleanup_free_ char *t = utf8_escape_invalid(value); |
599 | ||
717603e3 | 600 | log_error("%s:%u: invalid UTF-8 value for key %s: '%s', ignoring.", strna(filename), line, key, t); |
f27f0e21 GB |
601 | return -EINVAL; |
602 | } | |
a5c32cff | 603 | |
f27f0e21 GB |
604 | p = strjoin(key, "=", strempty(value), NULL); |
605 | if (!p) | |
606 | return -ENOMEM; | |
335c46b5 | 607 | |
6e18964d ZJS |
608 | r = strv_consume(m, p); |
609 | if (r < 0) | |
f27f0e21 | 610 | return r; |
a5c32cff | 611 | |
a5f6c30d MS |
612 | if (n_pushed) |
613 | (*n_pushed)++; | |
614 | ||
f73141d7 LP |
615 | free(value); |
616 | return 0; | |
617 | } | |
618 | ||
717603e3 LP |
619 | int load_env_file(FILE *f, const char *fname, const char *newline, char ***rl) { |
620 | char **m = NULL; | |
621 | int r; | |
622 | ||
623 | if (!newline) | |
624 | newline = NEWLINE; | |
625 | ||
a5f6c30d | 626 | r = parse_env_file_internal(f, fname, newline, load_env_file_push, &m, NULL); |
717603e3 LP |
627 | if (r < 0) { |
628 | strv_free(m); | |
629 | return r; | |
630 | } | |
631 | ||
632 | *rl = m; | |
633 | return 0; | |
634 | } | |
635 | ||
636 | static int load_env_file_push_pairs( | |
637 | const char *filename, unsigned line, | |
638 | const char *key, char *value, | |
a5f6c30d MS |
639 | void *userdata, |
640 | int *n_pushed) { | |
717603e3 LP |
641 | char ***m = userdata; |
642 | int r; | |
643 | ||
644 | if (!utf8_is_valid(key)) { | |
645 | _cleanup_free_ char *t = utf8_escape_invalid(key); | |
646 | ||
647 | log_error("%s:%u: invalid UTF-8 for key '%s', ignoring.", strna(filename), line, t); | |
648 | return -EINVAL; | |
649 | } | |
650 | ||
651 | if (value && !utf8_is_valid(value)) { | |
652 | _cleanup_free_ char *t = utf8_escape_invalid(value); | |
653 | ||
654 | log_error("%s:%u: invalid UTF-8 value for key %s: '%s', ignoring.", strna(filename), line, key, t); | |
655 | return -EINVAL; | |
656 | } | |
657 | ||
658 | r = strv_extend(m, key); | |
659 | if (r < 0) | |
660 | return -ENOMEM; | |
661 | ||
662 | if (!value) { | |
663 | r = strv_extend(m, ""); | |
664 | if (r < 0) | |
665 | return -ENOMEM; | |
666 | } else { | |
667 | r = strv_push(m, value); | |
668 | if (r < 0) | |
669 | return r; | |
670 | } | |
671 | ||
a5f6c30d MS |
672 | if (n_pushed) |
673 | (*n_pushed)++; | |
674 | ||
717603e3 LP |
675 | return 0; |
676 | } | |
677 | ||
678 | int load_env_file_pairs(FILE *f, const char *fname, const char *newline, char ***rl) { | |
f73141d7 LP |
679 | char **m = NULL; |
680 | int r; | |
a5c32cff | 681 | |
f73141d7 LP |
682 | if (!newline) |
683 | newline = NEWLINE; | |
684 | ||
a5f6c30d | 685 | r = parse_env_file_internal(f, fname, newline, load_env_file_push_pairs, &m, NULL); |
f73141d7 LP |
686 | if (r < 0) { |
687 | strv_free(m); | |
688 | return r; | |
a5c32cff HH |
689 | } |
690 | ||
691 | *rl = m; | |
a5c32cff HH |
692 | return 0; |
693 | } | |
694 | ||
768100ef LP |
695 | static void write_env_var(FILE *f, const char *v) { |
696 | const char *p; | |
697 | ||
698 | p = strchr(v, '='); | |
699 | if (!p) { | |
700 | /* Fallback */ | |
701 | fputs(v, f); | |
702 | fputc('\n', f); | |
703 | return; | |
704 | } | |
705 | ||
706 | p++; | |
707 | fwrite(v, 1, p-v, f); | |
708 | ||
0ce5a806 | 709 | if (string_has_cc(p, NULL) || chars_intersect(p, WHITESPACE SHELL_NEED_QUOTES)) { |
768100ef LP |
710 | fputc('\"', f); |
711 | ||
712 | for (; *p; p++) { | |
0ce5a806 | 713 | if (strchr(SHELL_NEED_ESCAPE, *p)) |
768100ef LP |
714 | fputc('\\', f); |
715 | ||
716 | fputc(*p, f); | |
717 | } | |
718 | ||
719 | fputc('\"', f); | |
720 | } else | |
721 | fputs(p, f); | |
722 | ||
723 | fputc('\n', f); | |
724 | } | |
725 | ||
a5c32cff | 726 | int write_env_file(const char *fname, char **l) { |
7fd1b19b | 727 | _cleanup_fclose_ FILE *f = NULL; |
736937e5 LP |
728 | _cleanup_free_ char *p = NULL; |
729 | char **i; | |
a5c32cff HH |
730 | int r; |
731 | ||
736937e5 LP |
732 | assert(fname); |
733 | ||
a5c32cff HH |
734 | r = fopen_temporary(fname, &f, &p); |
735 | if (r < 0) | |
736 | return r; | |
737 | ||
738 | fchmod_umask(fileno(f), 0644); | |
739 | ||
768100ef LP |
740 | STRV_FOREACH(i, l) |
741 | write_env_var(f, *i); | |
a5c32cff | 742 | |
736937e5 LP |
743 | r = fflush_and_check(f); |
744 | if (r >= 0) { | |
745 | if (rename(p, fname) >= 0) | |
746 | return 0; | |
a5c32cff | 747 | |
736937e5 | 748 | r = -errno; |
a5c32cff HH |
749 | } |
750 | ||
736937e5 | 751 | unlink(p); |
a5c32cff HH |
752 | return r; |
753 | } | |
68fee104 ZJS |
754 | |
755 | int executable_is_script(const char *path, char **interpreter) { | |
756 | int r; | |
c8b32e11 | 757 | _cleanup_free_ char *line = NULL; |
68fee104 ZJS |
758 | int len; |
759 | char *ans; | |
760 | ||
761 | assert(path); | |
762 | ||
763 | r = read_one_line_file(path, &line); | |
764 | if (r < 0) | |
765 | return r; | |
766 | ||
767 | if (!startswith(line, "#!")) | |
768 | return 0; | |
769 | ||
770 | ans = strstrip(line + 2); | |
771 | len = strcspn(ans, " \t"); | |
772 | ||
773 | if (len == 0) | |
774 | return 0; | |
775 | ||
776 | ans = strndup(ans, len); | |
777 | if (!ans) | |
778 | return -ENOMEM; | |
779 | ||
780 | *interpreter = ans; | |
781 | return 1; | |
782 | } | |
69ab8088 ZJS |
783 | |
784 | /** | |
0a7b53bd | 785 | * Retrieve one field from a file like /proc/self/status. pattern |
c4cd1d4d AK |
786 | * should not include whitespace or the delimiter (':'). pattern matches only |
787 | * the beginning of a line. Whitespace before ':' is skipped. Whitespace and | |
788 | * zeros after the ':' will be skipped. field must be freed afterwards. | |
789 | * terminator specifies the terminating characters of the field value (not | |
790 | * included in the value). | |
69ab8088 | 791 | */ |
c4cd1d4d | 792 | int get_proc_field(const char *filename, const char *pattern, const char *terminator, char **field) { |
69ab8088 | 793 | _cleanup_free_ char *status = NULL; |
90110825 | 794 | char *t, *f; |
69ab8088 ZJS |
795 | size_t len; |
796 | int r; | |
797 | ||
c4cd1d4d | 798 | assert(terminator); |
69ab8088 | 799 | assert(filename); |
7ff7394d | 800 | assert(pattern); |
69ab8088 ZJS |
801 | assert(field); |
802 | ||
803 | r = read_full_file(filename, &status, NULL); | |
804 | if (r < 0) | |
805 | return r; | |
806 | ||
c4cd1d4d AK |
807 | t = status; |
808 | ||
809 | do { | |
810 | bool pattern_ok; | |
811 | ||
812 | do { | |
813 | t = strstr(t, pattern); | |
814 | if (!t) | |
815 | return -ENOENT; | |
816 | ||
817 | /* Check that pattern occurs in beginning of line. */ | |
818 | pattern_ok = (t == status || t[-1] == '\n'); | |
819 | ||
820 | t += strlen(pattern); | |
821 | ||
822 | } while (!pattern_ok); | |
823 | ||
824 | t += strspn(t, " \t"); | |
825 | if (!*t) | |
826 | return -ENOENT; | |
827 | ||
828 | } while (*t != ':'); | |
829 | ||
830 | t++; | |
69ab8088 | 831 | |
4ec29144 | 832 | if (*t) { |
1e5413f7 ZJS |
833 | t += strspn(t, " \t"); |
834 | ||
835 | /* Also skip zeros, because when this is used for | |
836 | * capabilities, we don't want the zeros. This way the | |
837 | * same capability set always maps to the same string, | |
838 | * irrespective of the total capability set size. For | |
839 | * other numbers it shouldn't matter. */ | |
840 | t += strspn(t, "0"); | |
4ec29144 ZJS |
841 | /* Back off one char if there's nothing but whitespace |
842 | and zeros */ | |
1e5413f7 | 843 | if (!*t || isspace(*t)) |
4ec29144 ZJS |
844 | t --; |
845 | } | |
69ab8088 | 846 | |
c4cd1d4d | 847 | len = strcspn(t, terminator); |
69ab8088 | 848 | |
90110825 LP |
849 | f = strndup(t, len); |
850 | if (!f) | |
69ab8088 ZJS |
851 | return -ENOMEM; |
852 | ||
90110825 | 853 | *field = f; |
69ab8088 ZJS |
854 | return 0; |
855 | } | |
0d39fa9c LP |
856 | |
857 | DIR *xopendirat(int fd, const char *name, int flags) { | |
858 | int nfd; | |
859 | DIR *d; | |
860 | ||
861 | assert(!(flags & O_CREAT)); | |
862 | ||
863 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
864 | if (nfd < 0) | |
865 | return NULL; | |
866 | ||
867 | d = fdopendir(nfd); | |
868 | if (!d) { | |
869 | safe_close(nfd); | |
870 | return NULL; | |
871 | } | |
872 | ||
873 | return d; | |
874 | } | |
875 | ||
876 | static int search_and_fopen_internal(const char *path, const char *mode, const char *root, char **search, FILE **_f) { | |
877 | char **i; | |
878 | ||
879 | assert(path); | |
880 | assert(mode); | |
881 | assert(_f); | |
882 | ||
883 | if (!path_strv_resolve_uniq(search, root)) | |
884 | return -ENOMEM; | |
885 | ||
886 | STRV_FOREACH(i, search) { | |
887 | _cleanup_free_ char *p = NULL; | |
888 | FILE *f; | |
889 | ||
890 | if (root) | |
891 | p = strjoin(root, *i, "/", path, NULL); | |
892 | else | |
893 | p = strjoin(*i, "/", path, NULL); | |
894 | if (!p) | |
895 | return -ENOMEM; | |
896 | ||
897 | f = fopen(p, mode); | |
898 | if (f) { | |
899 | *_f = f; | |
900 | return 0; | |
901 | } | |
902 | ||
903 | if (errno != ENOENT) | |
904 | return -errno; | |
905 | } | |
906 | ||
907 | return -ENOENT; | |
908 | } | |
909 | ||
910 | int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f) { | |
911 | _cleanup_strv_free_ char **copy = NULL; | |
912 | ||
913 | assert(path); | |
914 | assert(mode); | |
915 | assert(_f); | |
916 | ||
917 | if (path_is_absolute(path)) { | |
918 | FILE *f; | |
919 | ||
920 | f = fopen(path, mode); | |
921 | if (f) { | |
922 | *_f = f; | |
923 | return 0; | |
924 | } | |
925 | ||
926 | return -errno; | |
927 | } | |
928 | ||
929 | copy = strv_copy((char**) search); | |
930 | if (!copy) | |
931 | return -ENOMEM; | |
932 | ||
933 | return search_and_fopen_internal(path, mode, root, copy, _f); | |
934 | } | |
935 | ||
936 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f) { | |
937 | _cleanup_strv_free_ char **s = NULL; | |
938 | ||
939 | if (path_is_absolute(path)) { | |
940 | FILE *f; | |
941 | ||
942 | f = fopen(path, mode); | |
943 | if (f) { | |
944 | *_f = f; | |
945 | return 0; | |
946 | } | |
947 | ||
948 | return -errno; | |
949 | } | |
950 | ||
951 | s = strv_split_nulstr(search); | |
952 | if (!s) | |
953 | return -ENOMEM; | |
954 | ||
955 | return search_and_fopen_internal(path, mode, root, s, _f); | |
956 | } | |
957 | ||
958 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { | |
959 | FILE *f; | |
960 | char *t; | |
961 | int r, fd; | |
962 | ||
963 | assert(path); | |
964 | assert(_f); | |
965 | assert(_temp_path); | |
966 | ||
967 | r = tempfn_xxxxxx(path, NULL, &t); | |
968 | if (r < 0) | |
969 | return r; | |
970 | ||
971 | fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC); | |
972 | if (fd < 0) { | |
973 | free(t); | |
974 | return -errno; | |
975 | } | |
976 | ||
977 | f = fdopen(fd, "we"); | |
978 | if (!f) { | |
979 | unlink_noerrno(t); | |
980 | free(t); | |
981 | safe_close(fd); | |
982 | return -errno; | |
983 | } | |
984 | ||
985 | *_f = f; | |
986 | *_temp_path = t; | |
987 | ||
988 | return 0; | |
989 | } | |
990 | ||
991 | int fflush_and_check(FILE *f) { | |
992 | assert(f); | |
993 | ||
994 | errno = 0; | |
995 | fflush(f); | |
996 | ||
997 | if (ferror(f)) | |
998 | return errno ? -errno : -EIO; | |
999 | ||
1000 | return 0; | |
1001 | } | |
1002 | ||
1003 | /* This is much like like mkostemp() but is subject to umask(). */ | |
1004 | int mkostemp_safe(char *pattern, int flags) { | |
1005 | _cleanup_umask_ mode_t u; | |
1006 | int fd; | |
1007 | ||
1008 | assert(pattern); | |
1009 | ||
1010 | u = umask(077); | |
1011 | ||
1012 | fd = mkostemp(pattern, flags); | |
1013 | if (fd < 0) | |
1014 | return -errno; | |
1015 | ||
1016 | return fd; | |
1017 | } | |
1018 | ||
1019 | int open_tmpfile(const char *path, int flags) { | |
1020 | char *p; | |
1021 | int fd; | |
1022 | ||
1023 | assert(path); | |
1024 | ||
1025 | #ifdef O_TMPFILE | |
1026 | /* Try O_TMPFILE first, if it is supported */ | |
1027 | fd = open(path, flags|O_TMPFILE|O_EXCL, S_IRUSR|S_IWUSR); | |
1028 | if (fd >= 0) | |
1029 | return fd; | |
1030 | #endif | |
1031 | ||
1032 | /* Fall back to unguessable name + unlinking */ | |
1033 | p = strjoina(path, "/systemd-tmp-XXXXXX"); | |
1034 | ||
1035 | fd = mkostemp_safe(p, flags); | |
1036 | if (fd < 0) | |
1037 | return fd; | |
1038 | ||
1039 | unlink(p); | |
1040 | return fd; | |
1041 | } | |
1042 | ||
1043 | int tempfn_xxxxxx(const char *p, const char *extra, char **ret) { | |
1044 | const char *fn; | |
1045 | char *t; | |
1046 | ||
1047 | assert(p); | |
1048 | assert(ret); | |
1049 | ||
1050 | /* | |
1051 | * Turns this: | |
1052 | * /foo/bar/waldo | |
1053 | * | |
1054 | * Into this: | |
1055 | * /foo/bar/.#<extra>waldoXXXXXX | |
1056 | */ | |
1057 | ||
1058 | fn = basename(p); | |
1059 | if (!filename_is_valid(fn)) | |
1060 | return -EINVAL; | |
1061 | ||
1062 | if (extra == NULL) | |
1063 | extra = ""; | |
1064 | ||
1065 | t = new(char, strlen(p) + 2 + strlen(extra) + 6 + 1); | |
1066 | if (!t) | |
1067 | return -ENOMEM; | |
1068 | ||
1069 | strcpy(stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn), "XXXXXX"); | |
1070 | ||
1071 | *ret = path_kill_slashes(t); | |
1072 | return 0; | |
1073 | } | |
1074 | ||
1075 | int tempfn_random(const char *p, const char *extra, char **ret) { | |
1076 | const char *fn; | |
1077 | char *t, *x; | |
1078 | uint64_t u; | |
1079 | unsigned i; | |
1080 | ||
1081 | assert(p); | |
1082 | assert(ret); | |
1083 | ||
1084 | /* | |
1085 | * Turns this: | |
1086 | * /foo/bar/waldo | |
1087 | * | |
1088 | * Into this: | |
1089 | * /foo/bar/.#<extra>waldobaa2a261115984a9 | |
1090 | */ | |
1091 | ||
1092 | fn = basename(p); | |
1093 | if (!filename_is_valid(fn)) | |
1094 | return -EINVAL; | |
1095 | ||
1096 | if (!extra) | |
1097 | extra = ""; | |
1098 | ||
1099 | t = new(char, strlen(p) + 2 + strlen(extra) + 16 + 1); | |
1100 | if (!t) | |
1101 | return -ENOMEM; | |
1102 | ||
1103 | x = stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn); | |
1104 | ||
1105 | u = random_u64(); | |
1106 | for (i = 0; i < 16; i++) { | |
1107 | *(x++) = hexchar(u & 0xF); | |
1108 | u >>= 4; | |
1109 | } | |
1110 | ||
1111 | *x = 0; | |
1112 | ||
1113 | *ret = path_kill_slashes(t); | |
1114 | return 0; | |
1115 | } | |
1116 | ||
1117 | int tempfn_random_child(const char *p, const char *extra, char **ret) { | |
1118 | char *t, *x; | |
1119 | uint64_t u; | |
1120 | unsigned i; | |
1121 | ||
1122 | assert(p); | |
1123 | assert(ret); | |
1124 | ||
1125 | /* Turns this: | |
1126 | * /foo/bar/waldo | |
1127 | * Into this: | |
1128 | * /foo/bar/waldo/.#<extra>3c2b6219aa75d7d0 | |
1129 | */ | |
1130 | ||
1131 | if (!extra) | |
1132 | extra = ""; | |
1133 | ||
1134 | t = new(char, strlen(p) + 3 + strlen(extra) + 16 + 1); | |
1135 | if (!t) | |
1136 | return -ENOMEM; | |
1137 | ||
1138 | x = stpcpy(stpcpy(stpcpy(t, p), "/.#"), extra); | |
1139 | ||
1140 | u = random_u64(); | |
1141 | for (i = 0; i < 16; i++) { | |
1142 | *(x++) = hexchar(u & 0xF); | |
1143 | u >>= 4; | |
1144 | } | |
1145 | ||
1146 | *x = 0; | |
1147 | ||
1148 | *ret = path_kill_slashes(t); | |
1149 | return 0; | |
1150 | } |