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