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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ | |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2012 Zbigniew Jędrzejewski-Szmek | |
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 <locale.h> | |
23 | #include <stdio.h> | |
24 | #include <string.h> | |
25 | #include <getopt.h> | |
26 | #include <fcntl.h> | |
27 | #include <unistd.h> | |
28 | ||
29 | #include <systemd/sd-journal.h> | |
30 | ||
31 | #include "build.h" | |
32 | #include "set.h" | |
33 | #include "util.h" | |
34 | #include "log.h" | |
35 | #include "path-util.h" | |
36 | #include "pager.h" | |
37 | #include "macro.h" | |
38 | #include "journal-internal.h" | |
39 | #include "copy.h" | |
40 | #include "compress.h" | |
41 | ||
42 | static enum { | |
43 | ACTION_NONE, | |
44 | ACTION_INFO, | |
45 | ACTION_LIST, | |
46 | ACTION_DUMP, | |
47 | ACTION_GDB, | |
48 | } arg_action = ACTION_LIST; | |
49 | static const char* arg_field = NULL; | |
50 | static int arg_no_pager = false; | |
51 | static int arg_no_legend = false; | |
52 | static int arg_one = false; | |
53 | ||
54 | static FILE* output = NULL; | |
55 | ||
56 | static Set *new_matches(void) { | |
57 | Set *set; | |
58 | char *tmp; | |
59 | int r; | |
60 | ||
61 | set = set_new(trivial_hash_func, trivial_compare_func); | |
62 | if (!set) { | |
63 | log_oom(); | |
64 | return NULL; | |
65 | } | |
66 | ||
67 | tmp = strdup("MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1"); | |
68 | if (!tmp) { | |
69 | log_oom(); | |
70 | set_free(set); | |
71 | return NULL; | |
72 | } | |
73 | ||
74 | r = set_consume(set, tmp); | |
75 | if (r < 0) { | |
76 | log_error("failed to add to set: %s", strerror(-r)); | |
77 | set_free(set); | |
78 | return NULL; | |
79 | } | |
80 | ||
81 | return set; | |
82 | } | |
83 | ||
84 | static int help(void) { | |
85 | ||
86 | printf("%s [OPTIONS...]\n\n" | |
87 | "List or retrieve coredumps from the journal.\n\n" | |
88 | "Flags:\n" | |
89 | " -h --help Show this help\n" | |
90 | " --version Print version string\n" | |
91 | " --no-pager Do not pipe output into a pager\n" | |
92 | " --no-legend Do not print the column headers.\n" | |
93 | " -1 Show information about most recent entry only\n" | |
94 | " -F --field=FIELD List all values a certain field takes\n" | |
95 | " -o --output=FILE Write output to FILE\n\n" | |
96 | ||
97 | "Commands:\n" | |
98 | " list [MATCHES...] List available coredumps (default)\n" | |
99 | " info [MATCHES...] Show detailed information about one or more coredumps\n" | |
100 | " dump [MATCHES...] Print first matching coredump to stdout\n" | |
101 | " gdb [MATCHES...] Start gdb for the first matching coredump\n" | |
102 | , program_invocation_short_name); | |
103 | ||
104 | return 0; | |
105 | } | |
106 | ||
107 | static int add_match(Set *set, const char *match) { | |
108 | int r = -ENOMEM; | |
109 | unsigned pid; | |
110 | const char* prefix; | |
111 | char *pattern = NULL; | |
112 | _cleanup_free_ char *p = NULL; | |
113 | ||
114 | if (strchr(match, '=')) | |
115 | prefix = ""; | |
116 | else if (strchr(match, '/')) { | |
117 | p = path_make_absolute_cwd(match); | |
118 | if (!p) | |
119 | goto fail; | |
120 | ||
121 | match = p; | |
122 | prefix = "COREDUMP_EXE="; | |
123 | } | |
124 | else if (safe_atou(match, &pid) == 0) | |
125 | prefix = "COREDUMP_PID="; | |
126 | else | |
127 | prefix = "COREDUMP_COMM="; | |
128 | ||
129 | pattern = strjoin(prefix, match, NULL); | |
130 | if (!pattern) | |
131 | goto fail; | |
132 | ||
133 | log_debug("Adding pattern: %s", pattern); | |
134 | r = set_put(set, pattern); | |
135 | if (r < 0) { | |
136 | log_error("Failed to add pattern '%s': %s", | |
137 | pattern, strerror(-r)); | |
138 | free(pattern); | |
139 | goto fail; | |
140 | } | |
141 | ||
142 | return 0; | |
143 | fail: | |
144 | log_error("Failed to add match: %s", strerror(-r)); | |
145 | return r; | |
146 | } | |
147 | ||
148 | static int parse_argv(int argc, char *argv[], Set *matches) { | |
149 | enum { | |
150 | ARG_VERSION = 0x100, | |
151 | ARG_NO_PAGER, | |
152 | ARG_NO_LEGEND, | |
153 | }; | |
154 | ||
155 | int r, c; | |
156 | ||
157 | static const struct option options[] = { | |
158 | { "help", no_argument, NULL, 'h' }, | |
159 | { "version" , no_argument, NULL, ARG_VERSION }, | |
160 | { "no-pager", no_argument, NULL, ARG_NO_PAGER }, | |
161 | { "no-legend", no_argument, NULL, ARG_NO_LEGEND }, | |
162 | { "output", required_argument, NULL, 'o' }, | |
163 | { "field", required_argument, NULL, 'F' }, | |
164 | {} | |
165 | }; | |
166 | ||
167 | assert(argc >= 0); | |
168 | assert(argv); | |
169 | ||
170 | while ((c = getopt_long(argc, argv, "ho:F:1", options, NULL)) >= 0) | |
171 | switch(c) { | |
172 | ||
173 | case 'h': | |
174 | arg_action = ACTION_NONE; | |
175 | return help(); | |
176 | ||
177 | case ARG_VERSION: | |
178 | arg_action = ACTION_NONE; | |
179 | puts(PACKAGE_STRING); | |
180 | puts(SYSTEMD_FEATURES); | |
181 | return 0; | |
182 | ||
183 | case ARG_NO_PAGER: | |
184 | arg_no_pager = true; | |
185 | break; | |
186 | ||
187 | case ARG_NO_LEGEND: | |
188 | arg_no_legend = true; | |
189 | break; | |
190 | ||
191 | case 'o': | |
192 | if (output) { | |
193 | log_error("cannot set output more than once"); | |
194 | return -EINVAL; | |
195 | } | |
196 | ||
197 | output = fopen(optarg, "we"); | |
198 | if (!output) { | |
199 | log_error("writing to '%s': %m", optarg); | |
200 | return -errno; | |
201 | } | |
202 | ||
203 | break; | |
204 | ||
205 | case 'F': | |
206 | if (arg_field) { | |
207 | log_error("cannot use --field/-F more than once"); | |
208 | return -EINVAL; | |
209 | } | |
210 | arg_field = optarg; | |
211 | break; | |
212 | ||
213 | case '1': | |
214 | arg_one = true; | |
215 | break; | |
216 | ||
217 | case '?': | |
218 | return -EINVAL; | |
219 | ||
220 | default: | |
221 | assert_not_reached("Unhandled option"); | |
222 | } | |
223 | ||
224 | if (optind < argc) { | |
225 | const char *cmd = argv[optind++]; | |
226 | if (streq(cmd, "list")) | |
227 | arg_action = ACTION_LIST; | |
228 | else if (streq(cmd, "dump")) | |
229 | arg_action = ACTION_DUMP; | |
230 | else if (streq(cmd, "gdb")) | |
231 | arg_action = ACTION_GDB; | |
232 | else if (streq(cmd, "info")) | |
233 | arg_action = ACTION_INFO; | |
234 | else { | |
235 | log_error("Unknown action '%s'", cmd); | |
236 | return -EINVAL; | |
237 | } | |
238 | } | |
239 | ||
240 | if (arg_field && arg_action != ACTION_LIST) { | |
241 | log_error("Option --field/-F only makes sense with list"); | |
242 | return -EINVAL; | |
243 | } | |
244 | ||
245 | while (optind < argc) { | |
246 | r = add_match(matches, argv[optind]); | |
247 | if (r != 0) | |
248 | return r; | |
249 | optind++; | |
250 | } | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
255 | static int retrieve(const void *data, | |
256 | size_t len, | |
257 | const char *name, | |
258 | char **var) { | |
259 | ||
260 | size_t ident; | |
261 | char *v; | |
262 | ||
263 | ident = strlen(name) + 1; /* name + "=" */ | |
264 | ||
265 | if (len < ident) | |
266 | return 0; | |
267 | ||
268 | if (memcmp(data, name, ident - 1) != 0) | |
269 | return 0; | |
270 | ||
271 | if (((const char*) data)[ident - 1] != '=') | |
272 | return 0; | |
273 | ||
274 | v = strndup((const char*)data + ident, len - ident); | |
275 | if (!v) | |
276 | return log_oom(); | |
277 | ||
278 | free(*var); | |
279 | *var = v; | |
280 | ||
281 | return 0; | |
282 | } | |
283 | ||
284 | static void print_field(FILE* file, sd_journal *j) { | |
285 | _cleanup_free_ char *value = NULL; | |
286 | const void *d; | |
287 | size_t l; | |
288 | ||
289 | assert(file); | |
290 | assert(j); | |
291 | ||
292 | assert(arg_field); | |
293 | ||
294 | SD_JOURNAL_FOREACH_DATA(j, d, l) | |
295 | retrieve(d, l, arg_field, &value); | |
296 | ||
297 | if (value) | |
298 | fprintf(file, "%s\n", value); | |
299 | } | |
300 | ||
301 | static int print_list(FILE* file, sd_journal *j, int had_legend) { | |
302 | _cleanup_free_ char | |
303 | *pid = NULL, *uid = NULL, *gid = NULL, | |
304 | *sgnl = NULL, *exe = NULL, *comm = NULL, *cmdline = NULL, | |
305 | *filename = NULL; | |
306 | const void *d; | |
307 | size_t l; | |
308 | usec_t t; | |
309 | char buf[FORMAT_TIMESTAMP_MAX]; | |
310 | int r; | |
311 | bool present; | |
312 | ||
313 | assert(file); | |
314 | assert(j); | |
315 | ||
316 | SD_JOURNAL_FOREACH_DATA(j, d, l) { | |
317 | retrieve(d, l, "COREDUMP_PID", &pid); | |
318 | retrieve(d, l, "COREDUMP_UID", &uid); | |
319 | retrieve(d, l, "COREDUMP_GID", &gid); | |
320 | retrieve(d, l, "COREDUMP_SIGNAL", &sgnl); | |
321 | retrieve(d, l, "COREDUMP_EXE", &exe); | |
322 | retrieve(d, l, "COREDUMP_COMM", &comm); | |
323 | retrieve(d, l, "COREDUMP_CMDLINE", &cmdline); | |
324 | retrieve(d, l, "COREDUMP_FILENAME", &filename); | |
325 | } | |
326 | ||
327 | if (!pid && !uid && !gid && !sgnl && !exe && !comm && !cmdline && !filename) { | |
328 | log_warning("Empty coredump log entry"); | |
329 | return -EINVAL; | |
330 | } | |
331 | ||
332 | r = sd_journal_get_realtime_usec(j, &t); | |
333 | if (r < 0) { | |
334 | log_error("Failed to get realtime timestamp: %s", strerror(-r)); | |
335 | return r; | |
336 | } | |
337 | ||
338 | format_timestamp(buf, sizeof(buf), t); | |
339 | present = filename && access(filename, F_OK) == 0; | |
340 | ||
341 | if (!had_legend && !arg_no_legend) | |
342 | fprintf(file, "%-*s %*s %*s %*s %*s %*s %s\n", | |
343 | FORMAT_TIMESTAMP_WIDTH, "TIME", | |
344 | 6, "PID", | |
345 | 5, "UID", | |
346 | 5, "GID", | |
347 | 3, "SIG", | |
348 | 1, "PRESENT", | |
349 | "EXE"); | |
350 | ||
351 | fprintf(file, "%-*s %*s %*s %*s %*s %*s %s\n", | |
352 | FORMAT_TIMESTAMP_WIDTH, buf, | |
353 | 6, strna(pid), | |
354 | 5, strna(uid), | |
355 | 5, strna(gid), | |
356 | 3, strna(sgnl), | |
357 | 1, present ? "*" : "", | |
358 | strna(exe ?: (comm ?: cmdline))); | |
359 | ||
360 | return 0; | |
361 | } | |
362 | ||
363 | static int print_info(FILE *file, sd_journal *j, bool need_space) { | |
364 | _cleanup_free_ char | |
365 | *pid = NULL, *uid = NULL, *gid = NULL, | |
366 | *sgnl = NULL, *exe = NULL, *comm = NULL, *cmdline = NULL, | |
367 | *unit = NULL, *user_unit = NULL, *session = NULL, | |
368 | *boot_id = NULL, *machine_id = NULL, *hostname = NULL, | |
369 | *slice = NULL, *cgroup = NULL, *owner_uid = NULL, | |
370 | *message = NULL, *timestamp = NULL, *filename = NULL; | |
371 | const void *d; | |
372 | size_t l; | |
373 | int r; | |
374 | ||
375 | assert(file); | |
376 | assert(j); | |
377 | ||
378 | SD_JOURNAL_FOREACH_DATA(j, d, l) { | |
379 | retrieve(d, l, "COREDUMP_PID", &pid); | |
380 | retrieve(d, l, "COREDUMP_UID", &uid); | |
381 | retrieve(d, l, "COREDUMP_GID", &gid); | |
382 | retrieve(d, l, "COREDUMP_SIGNAL", &sgnl); | |
383 | retrieve(d, l, "COREDUMP_EXE", &exe); | |
384 | retrieve(d, l, "COREDUMP_COMM", &comm); | |
385 | retrieve(d, l, "COREDUMP_CMDLINE", &cmdline); | |
386 | retrieve(d, l, "COREDUMP_UNIT", &unit); | |
387 | retrieve(d, l, "COREDUMP_USER_UNIT", &user_unit); | |
388 | retrieve(d, l, "COREDUMP_SESSION", &session); | |
389 | retrieve(d, l, "COREDUMP_OWNER_UID", &owner_uid); | |
390 | retrieve(d, l, "COREDUMP_SLICE", &slice); | |
391 | retrieve(d, l, "COREDUMP_CGROUP", &cgroup); | |
392 | retrieve(d, l, "COREDUMP_TIMESTAMP", ×tamp); | |
393 | retrieve(d, l, "COREDUMP_FILENAME", &filename); | |
394 | retrieve(d, l, "_BOOT_ID", &boot_id); | |
395 | retrieve(d, l, "_MACHINE_ID", &machine_id); | |
396 | retrieve(d, l, "_HOSTNAME", &hostname); | |
397 | retrieve(d, l, "MESSAGE", &message); | |
398 | } | |
399 | ||
400 | if (need_space) | |
401 | fputs("\n", file); | |
402 | ||
403 | if (comm) | |
404 | fprintf(file, | |
405 | " PID: %s%s%s (%s)\n", | |
406 | ansi_highlight(), strna(pid), ansi_highlight_off(), comm); | |
407 | else | |
408 | fprintf(file, | |
409 | " PID: %s%s%s\n", | |
410 | ansi_highlight(), strna(pid), ansi_highlight_off()); | |
411 | ||
412 | if (uid) { | |
413 | uid_t n; | |
414 | ||
415 | if (parse_uid(uid, &n) >= 0) { | |
416 | _cleanup_free_ char *u = NULL; | |
417 | ||
418 | u = uid_to_name(n); | |
419 | fprintf(file, | |
420 | " UID: %s (%s)\n", | |
421 | uid, u); | |
422 | } else { | |
423 | fprintf(file, | |
424 | " UID: %s\n", | |
425 | uid); | |
426 | } | |
427 | } | |
428 | ||
429 | if (gid) { | |
430 | gid_t n; | |
431 | ||
432 | if (parse_gid(gid, &n) >= 0) { | |
433 | _cleanup_free_ char *g = NULL; | |
434 | ||
435 | g = gid_to_name(n); | |
436 | fprintf(file, | |
437 | " GID: %s (%s)\n", | |
438 | gid, g); | |
439 | } else { | |
440 | fprintf(file, | |
441 | " GID: %s\n", | |
442 | gid); | |
443 | } | |
444 | } | |
445 | ||
446 | if (sgnl) { | |
447 | int sig; | |
448 | ||
449 | if (safe_atoi(sgnl, &sig) >= 0) | |
450 | fprintf(file, " Signal: %s (%s)\n", sgnl, signal_to_string(sig)); | |
451 | else | |
452 | fprintf(file, " Signal: %s\n", sgnl); | |
453 | } | |
454 | ||
455 | if (timestamp) { | |
456 | usec_t u; | |
457 | ||
458 | r = safe_atou64(timestamp, &u); | |
459 | if (r >= 0) { | |
460 | char absolute[FORMAT_TIMESTAMP_MAX], relative[FORMAT_TIMESPAN_MAX]; | |
461 | ||
462 | fprintf(file, | |
463 | " Timestamp: %s (%s)\n", | |
464 | format_timestamp(absolute, sizeof(absolute), u), | |
465 | format_timestamp_relative(relative, sizeof(relative), u)); | |
466 | ||
467 | } else | |
468 | fprintf(file, " Timestamp: %s\n", timestamp); | |
469 | } | |
470 | ||
471 | if (cmdline) | |
472 | fprintf(file, " Command Line: %s\n", cmdline); | |
473 | if (exe) | |
474 | fprintf(file, " Executable: %s%s%s\n", ansi_highlight(), exe, ansi_highlight_off()); | |
475 | if (cgroup) | |
476 | fprintf(file, " Control Group: %s\n", cgroup); | |
477 | if (unit) | |
478 | fprintf(file, " Unit: %s\n", unit); | |
479 | if (user_unit) | |
480 | fprintf(file, " User Unit: %s\n", unit); | |
481 | if (slice) | |
482 | fprintf(file, " Slice: %s\n", slice); | |
483 | if (session) | |
484 | fprintf(file, " Session: %s\n", session); | |
485 | if (owner_uid) { | |
486 | uid_t n; | |
487 | ||
488 | if (parse_uid(owner_uid, &n) >= 0) { | |
489 | _cleanup_free_ char *u = NULL; | |
490 | ||
491 | u = uid_to_name(n); | |
492 | fprintf(file, | |
493 | " Owner UID: %s (%s)\n", | |
494 | owner_uid, u); | |
495 | } else { | |
496 | fprintf(file, | |
497 | " Owner UID: %s\n", | |
498 | owner_uid); | |
499 | } | |
500 | } | |
501 | if (boot_id) | |
502 | fprintf(file, " Boot ID: %s\n", boot_id); | |
503 | if (machine_id) | |
504 | fprintf(file, " Machine ID: %s\n", machine_id); | |
505 | if (hostname) | |
506 | fprintf(file, " Hostname: %s\n", hostname); | |
507 | ||
508 | if (filename && access(filename, F_OK) == 0) | |
509 | fprintf(file, " Coredump: %s\n", filename); | |
510 | ||
511 | if (message) { | |
512 | _cleanup_free_ char *m = NULL; | |
513 | ||
514 | m = strreplace(message, "\n", "\n "); | |
515 | ||
516 | fprintf(file, " Message: %s\n", strstrip(m ?: message)); | |
517 | } | |
518 | ||
519 | return 0; | |
520 | } | |
521 | ||
522 | static int focus(sd_journal *j) { | |
523 | int r; | |
524 | ||
525 | r = sd_journal_seek_tail(j); | |
526 | if (r == 0) | |
527 | r = sd_journal_previous(j); | |
528 | if (r < 0) { | |
529 | log_error("Failed to search journal: %s", strerror(-r)); | |
530 | return r; | |
531 | } | |
532 | if (r == 0) { | |
533 | log_error("No match found."); | |
534 | return -ESRCH; | |
535 | } | |
536 | return r; | |
537 | } | |
538 | ||
539 | static void print_entry(sd_journal *j, unsigned n_found) { | |
540 | assert(j); | |
541 | ||
542 | if (arg_action == ACTION_INFO) | |
543 | print_info(stdout, j, n_found); | |
544 | else if (arg_field) | |
545 | print_field(stdout, j); | |
546 | else | |
547 | print_list(stdout, j, n_found); | |
548 | } | |
549 | ||
550 | static int dump_list(sd_journal *j) { | |
551 | unsigned n_found = 0; | |
552 | int r; | |
553 | ||
554 | assert(j); | |
555 | ||
556 | /* The coredumps are likely to compressed, and for just | |
557 | * listing them we don't need to decompress them, so let's | |
558 | * pick a fairly low data threshold here */ | |
559 | sd_journal_set_data_threshold(j, 4096); | |
560 | ||
561 | if (arg_one) { | |
562 | r = focus(j); | |
563 | if (r < 0) | |
564 | return r; | |
565 | ||
566 | print_entry(j, 0); | |
567 | } else { | |
568 | SD_JOURNAL_FOREACH(j) | |
569 | print_entry(j, n_found++); | |
570 | ||
571 | if (!arg_field && n_found <= 0) { | |
572 | log_notice("No coredumps found."); | |
573 | return -ESRCH; | |
574 | } | |
575 | } | |
576 | ||
577 | return 0; | |
578 | } | |
579 | ||
580 | static int save_core(sd_journal *j, int fd, char **path, bool *unlink_temp) { | |
581 | const char *data; | |
582 | _cleanup_free_ char *filename = NULL; | |
583 | size_t len; | |
584 | int r; | |
585 | ||
586 | assert((fd >= 0) != !!path); | |
587 | assert(!!path == !!unlink_temp); | |
588 | ||
589 | /* Prefer uncompressed file to journal (probably cached) to | |
590 | * compressed file (probably uncached). */ | |
591 | r = sd_journal_get_data(j, "COREDUMP_FILENAME", (const void**) &data, &len); | |
592 | if (r < 0 && r != -ENOENT) | |
593 | log_warning("Failed to retrieve COREDUMP_FILENAME: %s", strerror(-r)); | |
594 | else if (r == 0) | |
595 | retrieve(data, len, "COREDUMP_FILENAME", &filename); | |
596 | ||
597 | if (filename && access(filename, R_OK) < 0) { | |
598 | log_debug("File %s is not readable: %m", filename); | |
599 | free(filename); | |
600 | filename = NULL; | |
601 | } | |
602 | ||
603 | if (filename && !endswith(filename, ".xz")) { | |
604 | if (path) { | |
605 | *path = filename; | |
606 | filename = NULL; | |
607 | } | |
608 | ||
609 | return 0; | |
610 | } else { | |
611 | _cleanup_close_ int fdt = -1; | |
612 | char *temp = NULL; | |
613 | ||
614 | if (fd < 0) { | |
615 | temp = strdup("/var/tmp/coredump-XXXXXX"); | |
616 | if (!temp) | |
617 | return log_oom(); | |
618 | ||
619 | fdt = mkostemp_safe(temp, O_WRONLY|O_CLOEXEC); | |
620 | if (fdt < 0) { | |
621 | log_error("Failed to create temporary file: %m"); | |
622 | return -errno; | |
623 | } | |
624 | log_debug("Created temporary file %s", temp); | |
625 | ||
626 | fd = fdt; | |
627 | } | |
628 | ||
629 | r = sd_journal_get_data(j, "COREDUMP", (const void**) &data, &len); | |
630 | if (r == 0) { | |
631 | ssize_t sz; | |
632 | ||
633 | assert(len >= 9); | |
634 | data += 9; | |
635 | len -= 9; | |
636 | ||
637 | sz = write(fdt, data, len); | |
638 | if (sz < 0) { | |
639 | log_error("Failed to write temporary file: %m"); | |
640 | r = -errno; | |
641 | goto error; | |
642 | } | |
643 | if (sz != (ssize_t) len) { | |
644 | log_error("Short write to temporary file."); | |
645 | r = -EIO; | |
646 | goto error; | |
647 | } | |
648 | } else if (filename) { | |
649 | #ifdef HAVE_XZ | |
650 | _cleanup_close_ int fdf; | |
651 | ||
652 | fdf = open(filename, O_RDONLY | O_CLOEXEC); | |
653 | if (fdf < 0) { | |
654 | log_error("Failed to open %s: %m", filename); | |
655 | r = -errno; | |
656 | goto error; | |
657 | } | |
658 | ||
659 | r = decompress_stream(fdf, fd, -1); | |
660 | if (r < 0) { | |
661 | log_error("Failed to decompress %s: %s", filename, strerror(-r)); | |
662 | goto error; | |
663 | } | |
664 | #else | |
665 | log_error("Cannot decompress file. Compiled without XZ support."); | |
666 | r = -ENOTSUP; | |
667 | goto error; | |
668 | #endif | |
669 | } else { | |
670 | if (r == -ENOENT) | |
671 | log_error("Coredump neither in journal file nor stored externally on disk."); | |
672 | else | |
673 | log_error("Failed to retrieve COREDUMP field: %s", strerror(-r)); | |
674 | goto error; | |
675 | } | |
676 | ||
677 | if (temp) { | |
678 | *path = temp; | |
679 | *unlink_temp = true; | |
680 | } | |
681 | ||
682 | return 0; | |
683 | ||
684 | error: | |
685 | if (temp) { | |
686 | unlink(temp); | |
687 | log_debug("Removed temporary file %s", temp); | |
688 | } | |
689 | return r; | |
690 | } | |
691 | } | |
692 | ||
693 | static int dump_core(sd_journal* j) { | |
694 | int r; | |
695 | ||
696 | assert(j); | |
697 | ||
698 | r = focus(j); | |
699 | if (r < 0) | |
700 | return r; | |
701 | ||
702 | print_info(output ? stdout : stderr, j, false); | |
703 | ||
704 | if (on_tty() && !output) { | |
705 | log_error("Refusing to dump core to tty."); | |
706 | return -ENOTTY; | |
707 | } | |
708 | ||
709 | r = save_core(j, output ? fileno(output) : STDOUT_FILENO, NULL, NULL); | |
710 | if (r < 0) { | |
711 | log_error("Coredump retrieval failed: %s", strerror(-r)); | |
712 | return r; | |
713 | } | |
714 | ||
715 | r = sd_journal_previous(j); | |
716 | if (r >= 0) | |
717 | log_warning("More than one entry matches, ignoring rest."); | |
718 | ||
719 | return 0; | |
720 | } | |
721 | ||
722 | static int run_gdb(sd_journal *j) { | |
723 | _cleanup_free_ char *exe = NULL, *path = NULL; | |
724 | bool unlink_path = false; | |
725 | const char *data; | |
726 | siginfo_t st; | |
727 | size_t len; | |
728 | pid_t pid; | |
729 | int r; | |
730 | ||
731 | assert(j); | |
732 | ||
733 | r = focus(j); | |
734 | if (r < 0) | |
735 | return r; | |
736 | ||
737 | print_info(stdout, j, false); | |
738 | fputs("\n", stdout); | |
739 | ||
740 | r = sd_journal_get_data(j, "COREDUMP_EXE", (const void**) &data, &len); | |
741 | if (r < 0) { | |
742 | log_error("Failed to retrieve COREDUMP_EXE field: %s", strerror(-r)); | |
743 | return r; | |
744 | } | |
745 | ||
746 | assert(len > strlen("COREDUMP_EXE=")); | |
747 | data += strlen("COREDUMP_EXE="); | |
748 | len -= strlen("COREDUMP_EXE="); | |
749 | ||
750 | exe = strndup(data, len); | |
751 | if (!exe) | |
752 | return log_oom(); | |
753 | ||
754 | if (endswith(exe, " (deleted)")) { | |
755 | log_error("Binary already deleted."); | |
756 | return -ENOENT; | |
757 | } | |
758 | ||
759 | if (!path_is_absolute(exe)) { | |
760 | log_error("Binary is not an absolute path."); | |
761 | return -ENOENT; | |
762 | } | |
763 | ||
764 | r = save_core(j, -1, &path, &unlink_path); | |
765 | if (r < 0) { | |
766 | log_error("Failed to retrieve core: %s", strerror(-r)); | |
767 | return r; | |
768 | } | |
769 | ||
770 | pid = fork(); | |
771 | if (pid < 0) { | |
772 | log_error("Failed to fork(): %m"); | |
773 | r = -errno; | |
774 | goto finish; | |
775 | } | |
776 | if (pid == 0) { | |
777 | execlp("gdb", "gdb", exe, path, NULL); | |
778 | ||
779 | log_error("Failed to invoke gdb: %m"); | |
780 | _exit(1); | |
781 | } | |
782 | ||
783 | r = wait_for_terminate(pid, &st); | |
784 | if (r < 0) { | |
785 | log_error("Failed to wait for gdb: %m"); | |
786 | goto finish; | |
787 | } | |
788 | ||
789 | r = st.si_code == CLD_EXITED ? st.si_status : 255; | |
790 | ||
791 | finish: | |
792 | if (unlink_path) { | |
793 | log_debug("Removed temporary file %s", path); | |
794 | unlink(path); | |
795 | } | |
796 | ||
797 | return r; | |
798 | } | |
799 | ||
800 | int main(int argc, char *argv[]) { | |
801 | _cleanup_journal_close_ sd_journal*j = NULL; | |
802 | const char* match; | |
803 | Iterator it; | |
804 | int r = 0; | |
805 | _cleanup_set_free_free_ Set *matches = NULL; | |
806 | ||
807 | setlocale(LC_ALL, ""); | |
808 | log_parse_environment(); | |
809 | log_open(); | |
810 | ||
811 | matches = new_matches(); | |
812 | if (!matches) { | |
813 | r = -ENOMEM; | |
814 | goto end; | |
815 | } | |
816 | ||
817 | r = parse_argv(argc, argv, matches); | |
818 | if (r < 0) | |
819 | goto end; | |
820 | ||
821 | if (arg_action == ACTION_NONE) | |
822 | goto end; | |
823 | ||
824 | r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY); | |
825 | if (r < 0) { | |
826 | log_error("Failed to open journal: %s", strerror(-r)); | |
827 | goto end; | |
828 | } | |
829 | ||
830 | /* We want full data, nothing truncated. */ | |
831 | sd_journal_set_data_threshold(j, 0); | |
832 | ||
833 | SET_FOREACH(match, matches, it) { | |
834 | r = sd_journal_add_match(j, match, strlen(match)); | |
835 | if (r != 0) { | |
836 | log_error("Failed to add match '%s': %s", | |
837 | match, strerror(-r)); | |
838 | goto end; | |
839 | } | |
840 | } | |
841 | ||
842 | if (_unlikely_(log_get_max_level() >= LOG_PRI(LOG_DEBUG))) { | |
843 | _cleanup_free_ char *filter; | |
844 | ||
845 | filter = journal_make_match_string(j); | |
846 | log_debug("Journal filter: %s", filter); | |
847 | } | |
848 | ||
849 | switch(arg_action) { | |
850 | ||
851 | case ACTION_LIST: | |
852 | case ACTION_INFO: | |
853 | if (!arg_no_pager) | |
854 | pager_open(false); | |
855 | ||
856 | r = dump_list(j); | |
857 | break; | |
858 | ||
859 | case ACTION_DUMP: | |
860 | r = dump_core(j); | |
861 | break; | |
862 | ||
863 | case ACTION_GDB: | |
864 | r = run_gdb(j); | |
865 | break; | |
866 | ||
867 | default: | |
868 | assert_not_reached("Shouldn't be here"); | |
869 | } | |
870 | ||
871 | end: | |
872 | pager_close(); | |
873 | ||
874 | if (output) | |
875 | fclose(output); | |
876 | ||
877 | return r >= 0 ? r : EXIT_FAILURE; | |
878 | } |