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Commit | Line | Data |
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663996b3 MS |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2012 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
20 | #include <errno.h> | |
663996b3 MS |
21 | #include <stdio.h> |
22 | #include <sys/prctl.h> | |
e842803a | 23 | #include <sys/xattr.h> |
db2df898 | 24 | #include <unistd.h> |
663996b3 | 25 | |
5eef597e | 26 | #ifdef HAVE_ELFUTILS |
4c89c718 MP |
27 | #include <dwarf.h> |
28 | #include <elfutils/libdwfl.h> | |
5eef597e MP |
29 | #endif |
30 | ||
e735f4d4 MP |
31 | #include "sd-journal.h" |
32 | #include "sd-login.h" | |
4c89c718 | 33 | #include "sd-daemon.h" |
db2df898 MP |
34 | |
35 | #include "acl-util.h" | |
36 | #include "alloc-util.h" | |
37 | #include "capability-util.h" | |
663996b3 | 38 | #include "cgroup-util.h" |
db2df898 | 39 | #include "compress.h" |
e842803a MB |
40 | #include "conf-parser.h" |
41 | #include "copy.h" | |
e842803a | 42 | #include "coredump-vacuum.h" |
db2df898 MP |
43 | #include "dirent-util.h" |
44 | #include "escape.h" | |
45 | #include "fd-util.h" | |
46 | #include "fileio.h" | |
47 | #include "fs-util.h" | |
48 | #include "io-util.h" | |
49 | #include "journald-native.h" | |
50 | #include "log.h" | |
51 | #include "macro.h" | |
aa27b158 | 52 | #include "missing.h" |
db2df898 MP |
53 | #include "mkdir.h" |
54 | #include "parse-util.h" | |
e3bff60a | 55 | #include "process-util.h" |
4c89c718 | 56 | #include "socket-util.h" |
db2df898 MP |
57 | #include "special.h" |
58 | #include "stacktrace.h" | |
59 | #include "string-table.h" | |
60 | #include "string-util.h" | |
61 | #include "strv.h" | |
62 | #include "user-util.h" | |
63 | #include "util.h" | |
e842803a | 64 | |
e842803a | 65 | /* The maximum size up to which we process coredumps */ |
6300502b | 66 | #define PROCESS_SIZE_MAX ((uint64_t) (2LLU*1024LLU*1024LLU*1024LLU)) |
e842803a | 67 | |
4c89c718 | 68 | /* The maximum size up to which we leave the coredump around on disk */ |
e842803a MB |
69 | #define EXTERNAL_SIZE_MAX PROCESS_SIZE_MAX |
70 | ||
4c89c718 | 71 | /* The maximum size up to which we store the coredump in the journal */ |
e842803a | 72 | #define JOURNAL_SIZE_MAX ((size_t) (767LU*1024LU*1024LU)) |
663996b3 | 73 | |
663996b3 | 74 | /* Make sure to not make this larger than the maximum journal entry |
5eef597e MP |
75 | * size. See DATA_SIZE_MAX in journald-native.c. */ |
76 | assert_cc(JOURNAL_SIZE_MAX <= DATA_SIZE_MAX); | |
663996b3 MS |
77 | |
78 | enum { | |
4c89c718 MP |
79 | /* We use this as array indexes for a couple of special fields we use for naming coredumping files, and |
80 | * attaching xattrs */ | |
81 | CONTEXT_PID, | |
82 | CONTEXT_UID, | |
83 | CONTEXT_GID, | |
84 | CONTEXT_SIGNAL, | |
85 | CONTEXT_TIMESTAMP, | |
86 | CONTEXT_RLIMIT, | |
87 | CONTEXT_COMM, | |
88 | CONTEXT_EXE, | |
89 | _CONTEXT_MAX | |
e842803a MB |
90 | }; |
91 | ||
92 | typedef enum CoredumpStorage { | |
93 | COREDUMP_STORAGE_NONE, | |
94 | COREDUMP_STORAGE_EXTERNAL, | |
95 | COREDUMP_STORAGE_JOURNAL, | |
96 | COREDUMP_STORAGE_BOTH, | |
97 | _COREDUMP_STORAGE_MAX, | |
98 | _COREDUMP_STORAGE_INVALID = -1 | |
99 | } CoredumpStorage; | |
100 | ||
101 | static const char* const coredump_storage_table[_COREDUMP_STORAGE_MAX] = { | |
102 | [COREDUMP_STORAGE_NONE] = "none", | |
103 | [COREDUMP_STORAGE_EXTERNAL] = "external", | |
104 | [COREDUMP_STORAGE_JOURNAL] = "journal", | |
105 | [COREDUMP_STORAGE_BOTH] = "both", | |
663996b3 MS |
106 | }; |
107 | ||
e842803a MB |
108 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(coredump_storage, CoredumpStorage); |
109 | static DEFINE_CONFIG_PARSE_ENUM(config_parse_coredump_storage, coredump_storage, CoredumpStorage, "Failed to parse storage setting"); | |
110 | ||
111 | static CoredumpStorage arg_storage = COREDUMP_STORAGE_EXTERNAL; | |
112 | static bool arg_compress = true; | |
6300502b MP |
113 | static uint64_t arg_process_size_max = PROCESS_SIZE_MAX; |
114 | static uint64_t arg_external_size_max = EXTERNAL_SIZE_MAX; | |
e842803a | 115 | static size_t arg_journal_size_max = JOURNAL_SIZE_MAX; |
6300502b MP |
116 | static uint64_t arg_keep_free = (uint64_t) -1; |
117 | static uint64_t arg_max_use = (uint64_t) -1; | |
e842803a MB |
118 | |
119 | static int parse_config(void) { | |
120 | static const ConfigTableItem items[] = { | |
121 | { "Coredump", "Storage", config_parse_coredump_storage, 0, &arg_storage }, | |
122 | { "Coredump", "Compress", config_parse_bool, 0, &arg_compress }, | |
6300502b MP |
123 | { "Coredump", "ProcessSizeMax", config_parse_iec_uint64, 0, &arg_process_size_max }, |
124 | { "Coredump", "ExternalSizeMax", config_parse_iec_uint64, 0, &arg_external_size_max }, | |
e842803a | 125 | { "Coredump", "JournalSizeMax", config_parse_iec_size, 0, &arg_journal_size_max }, |
6300502b MP |
126 | { "Coredump", "KeepFree", config_parse_iec_uint64, 0, &arg_keep_free }, |
127 | { "Coredump", "MaxUse", config_parse_iec_uint64, 0, &arg_max_use }, | |
e842803a MB |
128 | {} |
129 | }; | |
130 | ||
db2df898 MP |
131 | return config_parse_many(PKGSYSCONFDIR "/coredump.conf", |
132 | CONF_PATHS_NULSTR("systemd/coredump.conf.d"), | |
f47781d8 MP |
133 | "Coredump\0", |
134 | config_item_table_lookup, items, | |
135 | false, NULL); | |
e842803a MB |
136 | } |
137 | ||
138 | static int fix_acl(int fd, uid_t uid) { | |
139 | ||
140 | #ifdef HAVE_ACL | |
141 | _cleanup_(acl_freep) acl_t acl = NULL; | |
142 | acl_entry_t entry; | |
143 | acl_permset_t permset; | |
db2df898 | 144 | int r; |
e842803a MB |
145 | |
146 | assert(fd >= 0); | |
147 | ||
148 | if (uid <= SYSTEM_UID_MAX) | |
149 | return 0; | |
150 | ||
151 | /* Make sure normal users can read (but not write or delete) | |
152 | * their own coredumps */ | |
153 | ||
154 | acl = acl_get_fd(fd); | |
f47781d8 MP |
155 | if (!acl) |
156 | return log_error_errno(errno, "Failed to get ACL: %m"); | |
e842803a MB |
157 | |
158 | if (acl_create_entry(&acl, &entry) < 0 || | |
159 | acl_set_tag_type(entry, ACL_USER) < 0 || | |
5a920b42 MP |
160 | acl_set_qualifier(entry, &uid) < 0) |
161 | return log_error_errno(errno, "Failed to patch ACL: %m"); | |
e842803a MB |
162 | |
163 | if (acl_get_permset(entry, &permset) < 0 || | |
db2df898 MP |
164 | acl_add_perm(permset, ACL_READ) < 0) |
165 | return log_warning_errno(errno, "Failed to patch ACL: %m"); | |
166 | ||
167 | r = calc_acl_mask_if_needed(&acl); | |
168 | if (r < 0) | |
169 | return log_warning_errno(r, "Failed to patch ACL: %m"); | |
e842803a | 170 | |
f47781d8 MP |
171 | if (acl_set_fd(fd, acl) < 0) |
172 | return log_error_errno(errno, "Failed to apply ACL: %m"); | |
e842803a MB |
173 | #endif |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
4c89c718 | 178 | static int fix_xattr(int fd, const char *context[_CONTEXT_MAX]) { |
e842803a | 179 | |
4c89c718 MP |
180 | static const char * const xattrs[_CONTEXT_MAX] = { |
181 | [CONTEXT_PID] = "user.coredump.pid", | |
182 | [CONTEXT_UID] = "user.coredump.uid", | |
183 | [CONTEXT_GID] = "user.coredump.gid", | |
184 | [CONTEXT_SIGNAL] = "user.coredump.signal", | |
185 | [CONTEXT_TIMESTAMP] = "user.coredump.timestamp", | |
186 | [CONTEXT_COMM] = "user.coredump.comm", | |
187 | [CONTEXT_EXE] = "user.coredump.exe", | |
e842803a MB |
188 | }; |
189 | ||
190 | int r = 0; | |
191 | unsigned i; | |
192 | ||
193 | assert(fd >= 0); | |
194 | ||
195 | /* Attach some metadata to coredumps via extended | |
196 | * attributes. Just because we can. */ | |
197 | ||
4c89c718 | 198 | for (i = 0; i < _CONTEXT_MAX; i++) { |
e842803a MB |
199 | int k; |
200 | ||
4c89c718 | 201 | if (isempty(context[i]) || !xattrs[i]) |
e842803a MB |
202 | continue; |
203 | ||
4c89c718 | 204 | k = fsetxattr(fd, xattrs[i], context[i], strlen(context[i]), XATTR_CREATE); |
e842803a MB |
205 | if (k < 0 && r == 0) |
206 | r = -errno; | |
207 | } | |
208 | ||
209 | return r; | |
210 | } | |
211 | ||
212 | #define filename_escape(s) xescape((s), "./ ") | |
213 | ||
aa27b158 MP |
214 | static inline const char *coredump_tmpfile_name(const char *s) { |
215 | return s ? s : "(unnamed temporary file)"; | |
216 | } | |
217 | ||
e842803a MB |
218 | static int fix_permissions( |
219 | int fd, | |
220 | const char *filename, | |
221 | const char *target, | |
4c89c718 | 222 | const char *context[_CONTEXT_MAX], |
e842803a MB |
223 | uid_t uid) { |
224 | ||
aa27b158 MP |
225 | int r; |
226 | ||
e842803a | 227 | assert(fd >= 0); |
e842803a | 228 | assert(target); |
4c89c718 | 229 | assert(context); |
e842803a MB |
230 | |
231 | /* Ignore errors on these */ | |
4c89c718 MP |
232 | (void) fchmod(fd, 0640); |
233 | (void) fix_acl(fd, uid); | |
234 | (void) fix_xattr(fd, context); | |
e842803a | 235 | |
f47781d8 | 236 | if (fsync(fd) < 0) |
aa27b158 | 237 | return log_error_errno(errno, "Failed to sync coredump %s: %m", coredump_tmpfile_name(filename)); |
e842803a | 238 | |
aa27b158 MP |
239 | r = link_tmpfile(fd, filename, target); |
240 | if (r < 0) | |
241 | return log_error_errno(r, "Failed to move coredump %s into place: %m", target); | |
e842803a MB |
242 | |
243 | return 0; | |
244 | } | |
245 | ||
6300502b | 246 | static int maybe_remove_external_coredump(const char *filename, uint64_t size) { |
e842803a MB |
247 | |
248 | /* Returns 1 if might remove, 0 if will not remove, < 0 on error. */ | |
249 | ||
250 | if (IN_SET(arg_storage, COREDUMP_STORAGE_EXTERNAL, COREDUMP_STORAGE_BOTH) && | |
251 | size <= arg_external_size_max) | |
252 | return 0; | |
253 | ||
254 | if (!filename) | |
255 | return 1; | |
256 | ||
f47781d8 MP |
257 | if (unlink(filename) < 0 && errno != ENOENT) |
258 | return log_error_errno(errno, "Failed to unlink %s: %m", filename); | |
e842803a MB |
259 | |
260 | return 1; | |
261 | } | |
262 | ||
4c89c718 | 263 | static int make_filename(const char *context[_CONTEXT_MAX], char **ret) { |
e842803a | 264 | _cleanup_free_ char *c = NULL, *u = NULL, *p = NULL, *t = NULL; |
e3bff60a | 265 | sd_id128_t boot = {}; |
e842803a MB |
266 | int r; |
267 | ||
4c89c718 | 268 | assert(context); |
e842803a | 269 | |
4c89c718 | 270 | c = filename_escape(context[CONTEXT_COMM]); |
e842803a MB |
271 | if (!c) |
272 | return -ENOMEM; | |
273 | ||
4c89c718 | 274 | u = filename_escape(context[CONTEXT_UID]); |
e842803a MB |
275 | if (!u) |
276 | return -ENOMEM; | |
277 | ||
278 | r = sd_id128_get_boot(&boot); | |
279 | if (r < 0) | |
280 | return r; | |
281 | ||
4c89c718 | 282 | p = filename_escape(context[CONTEXT_PID]); |
e842803a MB |
283 | if (!p) |
284 | return -ENOMEM; | |
663996b3 | 285 | |
4c89c718 | 286 | t = filename_escape(context[CONTEXT_TIMESTAMP]); |
e842803a MB |
287 | if (!t) |
288 | return -ENOMEM; | |
289 | ||
290 | if (asprintf(ret, | |
291 | "/var/lib/systemd/coredump/core.%s.%s." SD_ID128_FORMAT_STR ".%s.%s000000", | |
292 | c, | |
293 | u, | |
294 | SD_ID128_FORMAT_VAL(boot), | |
295 | p, | |
296 | t) < 0) | |
297 | return -ENOMEM; | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | static int save_external_coredump( | |
4c89c718 MP |
303 | const char *context[_CONTEXT_MAX], |
304 | int input_fd, | |
e842803a | 305 | char **ret_filename, |
4c89c718 MP |
306 | int *ret_node_fd, |
307 | int *ret_data_fd, | |
6300502b | 308 | uint64_t *ret_size) { |
e842803a MB |
309 | |
310 | _cleanup_free_ char *fn = NULL, *tmp = NULL; | |
311 | _cleanup_close_ int fd = -1; | |
4c89c718 | 312 | uint64_t rlimit, max_size; |
e842803a | 313 | struct stat st; |
4c89c718 | 314 | uid_t uid; |
e842803a MB |
315 | int r; |
316 | ||
4c89c718 | 317 | assert(context); |
e842803a | 318 | assert(ret_filename); |
4c89c718 MP |
319 | assert(ret_node_fd); |
320 | assert(ret_data_fd); | |
e842803a MB |
321 | assert(ret_size); |
322 | ||
4c89c718 MP |
323 | r = parse_uid(context[CONTEXT_UID], &uid); |
324 | if (r < 0) | |
325 | return log_error_errno(r, "Failed to parse UID: %m"); | |
326 | ||
327 | r = safe_atou64(context[CONTEXT_RLIMIT], &rlimit); | |
328 | if (r < 0) | |
329 | return log_error_errno(r, "Failed to parse resource limit: %s", context[CONTEXT_RLIMIT]); | |
330 | if (rlimit <= 0) { | |
331 | /* Is coredumping disabled? Then don't bother saving/processing the coredump */ | |
332 | log_info("Core Dumping has been disabled for process %s (%s).", context[CONTEXT_PID], context[CONTEXT_COMM]); | |
333 | return -EBADSLT; | |
334 | } | |
335 | ||
336 | /* Never store more than the process configured, or than we actually shall keep or process */ | |
337 | max_size = MIN(rlimit, MAX(arg_process_size_max, arg_external_size_max)); | |
338 | ||
339 | r = make_filename(context, &fn); | |
f47781d8 MP |
340 | if (r < 0) |
341 | return log_error_errno(r, "Failed to determine coredump file name: %m"); | |
e842803a | 342 | |
663996b3 MS |
343 | mkdir_p_label("/var/lib/systemd/coredump", 0755); |
344 | ||
aa27b158 | 345 | fd = open_tmpfile_linkable(fn, O_RDWR|O_CLOEXEC, &tmp); |
f47781d8 | 346 | if (fd < 0) |
aa27b158 | 347 | return log_error_errno(fd, "Failed to create temporary file for coredump %s: %m", fn); |
663996b3 | 348 | |
4c89c718 | 349 | r = copy_bytes(input_fd, fd, max_size, false); |
f47781d8 | 350 | if (r == -EFBIG) { |
4c89c718 | 351 | log_error("Coredump of %s (%s) is larger than configured processing limit, refusing.", context[CONTEXT_PID], context[CONTEXT_COMM]); |
e842803a MB |
352 | goto fail; |
353 | } else if (IN_SET(r, -EDQUOT, -ENOSPC)) { | |
4c89c718 | 354 | log_error("Not enough disk space for coredump of %s (%s), refusing.", context[CONTEXT_PID], context[CONTEXT_COMM]); |
e842803a MB |
355 | goto fail; |
356 | } else if (r < 0) { | |
f47781d8 | 357 | log_error_errno(r, "Failed to dump coredump to file: %m"); |
e842803a MB |
358 | goto fail; |
359 | } | |
360 | ||
361 | if (fstat(fd, &st) < 0) { | |
aa27b158 | 362 | log_error_errno(errno, "Failed to fstat coredump %s: %m", coredump_tmpfile_name(tmp)); |
e842803a MB |
363 | goto fail; |
364 | } | |
365 | ||
366 | if (lseek(fd, 0, SEEK_SET) == (off_t) -1) { | |
aa27b158 | 367 | log_error_errno(errno, "Failed to seek on %s: %m", coredump_tmpfile_name(tmp)); |
e842803a MB |
368 | goto fail; |
369 | } | |
370 | ||
5eef597e | 371 | #if defined(HAVE_XZ) || defined(HAVE_LZ4) |
e842803a MB |
372 | /* If we will remove the coredump anyway, do not compress. */ |
373 | if (maybe_remove_external_coredump(NULL, st.st_size) == 0 | |
374 | && arg_compress) { | |
375 | ||
376 | _cleanup_free_ char *fn_compressed = NULL, *tmp_compressed = NULL; | |
377 | _cleanup_close_ int fd_compressed = -1; | |
663996b3 | 378 | |
5eef597e | 379 | fn_compressed = strappend(fn, COMPRESSED_EXT); |
e842803a | 380 | if (!fn_compressed) { |
5eef597e | 381 | log_oom(); |
e842803a MB |
382 | goto uncompressed; |
383 | } | |
384 | ||
aa27b158 | 385 | fd_compressed = open_tmpfile_linkable(fn_compressed, O_RDWR|O_CLOEXEC, &tmp_compressed); |
e842803a | 386 | if (fd_compressed < 0) { |
aa27b158 | 387 | log_error_errno(fd_compressed, "Failed to create temporary file for coredump %s: %m", fn_compressed); |
e842803a | 388 | goto uncompressed; |
663996b3 MS |
389 | } |
390 | ||
5eef597e | 391 | r = compress_stream(fd, fd_compressed, -1); |
e842803a | 392 | if (r < 0) { |
aa27b158 | 393 | log_error_errno(r, "Failed to compress %s: %m", coredump_tmpfile_name(tmp_compressed)); |
e842803a | 394 | goto fail_compressed; |
663996b3 | 395 | } |
e842803a | 396 | |
4c89c718 | 397 | r = fix_permissions(fd_compressed, tmp_compressed, fn_compressed, context, uid); |
e842803a MB |
398 | if (r < 0) |
399 | goto fail_compressed; | |
400 | ||
401 | /* OK, this worked, we can get rid of the uncompressed version now */ | |
aa27b158 MP |
402 | if (tmp) |
403 | unlink_noerrno(tmp); | |
e842803a | 404 | |
6300502b | 405 | *ret_filename = fn_compressed; /* compressed */ |
4c89c718 MP |
406 | *ret_node_fd = fd_compressed; /* compressed */ |
407 | *ret_data_fd = fd; /* uncompressed */ | |
6300502b | 408 | *ret_size = (uint64_t) st.st_size; /* uncompressed */ |
e842803a MB |
409 | |
410 | fn_compressed = NULL; | |
4c89c718 | 411 | fd = fd_compressed = -1; |
e842803a MB |
412 | |
413 | return 0; | |
414 | ||
415 | fail_compressed: | |
aa27b158 MP |
416 | if (tmp_compressed) |
417 | (void) unlink(tmp_compressed); | |
663996b3 | 418 | } |
e842803a MB |
419 | |
420 | uncompressed: | |
5eef597e | 421 | #endif |
4c89c718 MP |
422 | |
423 | r = fix_permissions(fd, tmp, fn, context, uid); | |
e842803a MB |
424 | if (r < 0) |
425 | goto fail; | |
426 | ||
427 | *ret_filename = fn; | |
4c89c718 MP |
428 | *ret_data_fd = fd; |
429 | *ret_node_fd = -1; | |
6300502b | 430 | *ret_size = (uint64_t) st.st_size; |
e842803a MB |
431 | |
432 | fn = NULL; | |
433 | fd = -1; | |
434 | ||
435 | return 0; | |
436 | ||
437 | fail: | |
aa27b158 MP |
438 | if (tmp) |
439 | (void) unlink(tmp); | |
e842803a MB |
440 | return r; |
441 | } | |
663996b3 | 442 | |
e842803a MB |
443 | static int allocate_journal_field(int fd, size_t size, char **ret, size_t *ret_size) { |
444 | _cleanup_free_ char *field = NULL; | |
445 | ssize_t n; | |
446 | ||
447 | assert(fd >= 0); | |
448 | assert(ret); | |
449 | assert(ret_size); | |
663996b3 | 450 | |
f47781d8 MP |
451 | if (lseek(fd, 0, SEEK_SET) == (off_t) -1) |
452 | return log_warning_errno(errno, "Failed to seek: %m"); | |
663996b3 | 453 | |
e842803a MB |
454 | field = malloc(9 + size); |
455 | if (!field) { | |
456 | log_warning("Failed to allocate memory for coredump, coredump will not be stored."); | |
457 | return -ENOMEM; | |
458 | } | |
459 | ||
460 | memcpy(field, "COREDUMP=", 9); | |
461 | ||
462 | n = read(fd, field + 9, size); | |
f47781d8 MP |
463 | if (n < 0) |
464 | return log_error_errno((int) n, "Failed to read core data: %m"); | |
e842803a MB |
465 | if ((size_t) n < size) { |
466 | log_error("Core data too short."); | |
467 | return -EIO; | |
468 | } | |
469 | ||
470 | *ret = field; | |
471 | *ret_size = size + 9; | |
472 | ||
473 | field = NULL; | |
474 | ||
663996b3 MS |
475 | return 0; |
476 | } | |
477 | ||
f47781d8 MP |
478 | /* Joins /proc/[pid]/fd/ and /proc/[pid]/fdinfo/ into the following lines: |
479 | * 0:/dev/pts/23 | |
480 | * pos: 0 | |
481 | * flags: 0100002 | |
482 | * | |
483 | * 1:/dev/pts/23 | |
484 | * pos: 0 | |
485 | * flags: 0100002 | |
486 | * | |
487 | * 2:/dev/pts/23 | |
488 | * pos: 0 | |
489 | * flags: 0100002 | |
490 | * EOF | |
491 | */ | |
492 | static int compose_open_fds(pid_t pid, char **open_fds) { | |
493 | _cleanup_closedir_ DIR *proc_fd_dir = NULL; | |
494 | _cleanup_close_ int proc_fdinfo_fd = -1; | |
495 | _cleanup_free_ char *buffer = NULL; | |
496 | _cleanup_fclose_ FILE *stream = NULL; | |
497 | const char *fddelim = "", *path; | |
498 | struct dirent *dent = NULL; | |
499 | size_t size = 0; | |
500 | int r = 0; | |
501 | ||
502 | assert(pid >= 0); | |
503 | assert(open_fds != NULL); | |
504 | ||
505 | path = procfs_file_alloca(pid, "fd"); | |
506 | proc_fd_dir = opendir(path); | |
507 | if (!proc_fd_dir) | |
508 | return -errno; | |
509 | ||
510 | proc_fdinfo_fd = openat(dirfd(proc_fd_dir), "../fdinfo", O_DIRECTORY|O_NOFOLLOW|O_CLOEXEC|O_PATH); | |
511 | if (proc_fdinfo_fd < 0) | |
512 | return -errno; | |
513 | ||
514 | stream = open_memstream(&buffer, &size); | |
515 | if (!stream) | |
516 | return -ENOMEM; | |
517 | ||
518 | FOREACH_DIRENT(dent, proc_fd_dir, return -errno) { | |
519 | _cleanup_fclose_ FILE *fdinfo = NULL; | |
520 | _cleanup_free_ char *fdname = NULL; | |
521 | char line[LINE_MAX]; | |
522 | int fd; | |
523 | ||
524 | r = readlinkat_malloc(dirfd(proc_fd_dir), dent->d_name, &fdname); | |
525 | if (r < 0) | |
526 | return r; | |
527 | ||
528 | fprintf(stream, "%s%s:%s\n", fddelim, dent->d_name, fdname); | |
529 | fddelim = "\n"; | |
530 | ||
531 | /* Use the directory entry from /proc/[pid]/fd with /proc/[pid]/fdinfo */ | |
532 | fd = openat(proc_fdinfo_fd, dent->d_name, O_NOFOLLOW|O_CLOEXEC|O_RDONLY); | |
533 | if (fd < 0) | |
534 | continue; | |
535 | ||
536 | fdinfo = fdopen(fd, "re"); | |
537 | if (fdinfo == NULL) { | |
538 | close(fd); | |
539 | continue; | |
540 | } | |
541 | ||
542 | FOREACH_LINE(line, fdinfo, break) { | |
543 | fputs(line, stream); | |
544 | if (!endswith(line, "\n")) | |
545 | fputc('\n', stream); | |
546 | } | |
547 | } | |
548 | ||
549 | errno = 0; | |
6300502b | 550 | stream = safe_fclose(stream); |
f47781d8 | 551 | |
4c89c718 | 552 | if (errno > 0) |
f47781d8 MP |
553 | return -errno; |
554 | ||
555 | *open_fds = buffer; | |
556 | buffer = NULL; | |
557 | ||
558 | return 0; | |
559 | } | |
560 | ||
4c89c718 MP |
561 | static int change_uid_gid(const char *context[]) { |
562 | uid_t uid; | |
563 | gid_t gid; | |
564 | int r; | |
e842803a | 565 | |
4c89c718 MP |
566 | r = parse_uid(context[CONTEXT_UID], &uid); |
567 | if (r < 0) | |
568 | return r; | |
f47781d8 | 569 | |
4c89c718 MP |
570 | if (uid <= SYSTEM_UID_MAX) { |
571 | const char *user = "systemd-coredump"; | |
f47781d8 | 572 | |
4c89c718 MP |
573 | r = get_user_creds(&user, &uid, &gid, NULL, NULL); |
574 | if (r < 0) { | |
575 | log_warning_errno(r, "Cannot resolve %s user. Proceeding to dump core as root: %m", user); | |
576 | uid = gid = 0; | |
577 | } | |
578 | } else { | |
579 | r = parse_gid(context[CONTEXT_GID], &gid); | |
580 | if (r < 0) | |
581 | return r; | |
582 | } | |
e842803a | 583 | |
4c89c718 MP |
584 | return drop_privileges(uid, gid, 0); |
585 | } | |
586 | ||
587 | static int submit_coredump( | |
588 | const char *context[_CONTEXT_MAX], | |
589 | struct iovec *iovec, | |
590 | size_t n_iovec_allocated, | |
591 | size_t n_iovec, | |
592 | int input_fd) { | |
e842803a | 593 | |
4c89c718 MP |
594 | _cleanup_close_ int coredump_fd = -1, coredump_node_fd = -1; |
595 | _cleanup_free_ char *core_message = NULL, *filename = NULL, *coredump_data = NULL; | |
6300502b | 596 | uint64_t coredump_size; |
4c89c718 | 597 | int r; |
663996b3 | 598 | |
4c89c718 MP |
599 | assert(context); |
600 | assert(iovec); | |
601 | assert(n_iovec_allocated >= n_iovec + 3); | |
602 | assert(input_fd >= 0); | |
663996b3 | 603 | |
4c89c718 MP |
604 | /* Vacuum before we write anything again */ |
605 | (void) coredump_vacuum(-1, arg_keep_free, arg_max_use); | |
663996b3 | 606 | |
4c89c718 MP |
607 | /* Always stream the coredump to disk, if that's possible */ |
608 | r = save_external_coredump(context, input_fd, &filename, &coredump_node_fd, &coredump_fd, &coredump_size); | |
609 | if (r < 0) | |
610 | /* Skip whole core dumping part */ | |
611 | goto log; | |
612 | ||
613 | /* If we don't want to keep the coredump on disk, remove it now, as later on we will lack the privileges for | |
614 | * it. However, we keep the fd to it, so that we can still process it and log it. */ | |
615 | r = maybe_remove_external_coredump(filename, coredump_size); | |
616 | if (r < 0) | |
617 | return r; | |
618 | if (r == 0) { | |
619 | const char *coredump_filename; | |
620 | ||
621 | coredump_filename = strjoina("COREDUMP_FILENAME=", filename); | |
622 | IOVEC_SET_STRING(iovec[n_iovec++], coredump_filename); | |
663996b3 MS |
623 | } |
624 | ||
4c89c718 MP |
625 | /* Vacuum again, but exclude the coredump we just created */ |
626 | (void) coredump_vacuum(coredump_node_fd >= 0 ? coredump_node_fd : coredump_fd, arg_keep_free, arg_max_use); | |
e842803a | 627 | |
4c89c718 MP |
628 | /* Now, let's drop privileges to become the user who owns the segfaulted process and allocate the coredump |
629 | * memory under the user's uid. This also ensures that the credentials journald will see are the ones of the | |
630 | * coredumping user, thus making sure the user gets access to the core dump. Let's also get rid of all | |
631 | * capabilities, if we run as root, we won't need them anymore. */ | |
632 | r = change_uid_gid(context); | |
633 | if (r < 0) | |
634 | return log_error_errno(r, "Failed to drop privileges: %m"); | |
e842803a | 635 | |
4c89c718 MP |
636 | #ifdef HAVE_ELFUTILS |
637 | /* Try to get a strack trace if we can */ | |
638 | if (coredump_size <= arg_process_size_max) { | |
639 | _cleanup_free_ char *stacktrace = NULL; | |
640 | ||
641 | r = coredump_make_stack_trace(coredump_fd, context[CONTEXT_EXE], &stacktrace); | |
642 | if (r >= 0) | |
643 | core_message = strjoin("MESSAGE=Process ", context[CONTEXT_PID], " (", context[CONTEXT_COMM], ") of user ", context[CONTEXT_UID], " dumped core.\n\n", stacktrace, NULL); | |
644 | else if (r == -EINVAL) | |
645 | log_warning("Failed to generate stack trace: %s", dwfl_errmsg(dwfl_errno())); | |
646 | else | |
647 | log_warning_errno(r, "Failed to generate stack trace: %m"); | |
e842803a | 648 | } |
663996b3 | 649 | |
4c89c718 MP |
650 | if (!core_message) |
651 | #endif | |
652 | log: | |
653 | core_message = strjoin("MESSAGE=Process ", context[CONTEXT_PID], " (", context[CONTEXT_COMM], ") of user ", context[CONTEXT_UID], " dumped core.", NULL); | |
654 | if (core_message) | |
655 | IOVEC_SET_STRING(iovec[n_iovec++], core_message); | |
656 | ||
657 | /* Optionally store the entire coredump in the journal */ | |
658 | if (IN_SET(arg_storage, COREDUMP_STORAGE_JOURNAL, COREDUMP_STORAGE_BOTH) && | |
659 | coredump_size <= arg_journal_size_max) { | |
660 | size_t sz = 0; | |
661 | ||
662 | /* Store the coredump itself in the journal */ | |
663 | ||
664 | r = allocate_journal_field(coredump_fd, (size_t) coredump_size, &coredump_data, &sz); | |
665 | if (r >= 0) { | |
666 | iovec[n_iovec].iov_base = coredump_data; | |
667 | iovec[n_iovec].iov_len = sz; | |
668 | n_iovec++; | |
669 | } | |
663996b3 MS |
670 | } |
671 | ||
4c89c718 MP |
672 | assert(n_iovec <= n_iovec_allocated); |
673 | ||
674 | r = sd_journal_sendv(iovec, n_iovec); | |
675 | if (r < 0) | |
676 | return log_error_errno(r, "Failed to log coredump: %m"); | |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
681 | static void map_context_fields(const struct iovec *iovec, const char *context[]) { | |
682 | ||
683 | static const char * const context_field_names[_CONTEXT_MAX] = { | |
684 | [CONTEXT_PID] = "COREDUMP_PID=", | |
685 | [CONTEXT_UID] = "COREDUMP_UID=", | |
686 | [CONTEXT_GID] = "COREDUMP_GID=", | |
687 | [CONTEXT_SIGNAL] = "COREDUMP_SIGNAL=", | |
688 | [CONTEXT_TIMESTAMP] = "COREDUMP_TIMESTAMP=", | |
689 | [CONTEXT_COMM] = "COREDUMP_COMM=", | |
690 | [CONTEXT_EXE] = "COREDUMP_EXE=", | |
691 | [CONTEXT_RLIMIT] = "COREDUMP_RLIMIT=", | |
692 | }; | |
693 | ||
694 | unsigned i; | |
695 | ||
696 | assert(iovec); | |
697 | assert(context); | |
698 | ||
699 | for (i = 0; i < _CONTEXT_MAX; i++) { | |
700 | size_t l; | |
701 | ||
702 | l = strlen(context_field_names[i]); | |
703 | if (iovec->iov_len < l) | |
704 | continue; | |
705 | ||
706 | if (memcmp(iovec->iov_base, context_field_names[i], l) != 0) | |
707 | continue; | |
708 | ||
709 | /* Note that these strings are NUL terminated, because we made sure that a trailing NUL byte is in the | |
710 | * buffer, though not included in the iov_len count. (see below) */ | |
711 | context[i] = (char*) iovec->iov_base + l; | |
712 | break; | |
713 | } | |
714 | } | |
715 | ||
716 | static int process_socket(int fd) { | |
717 | _cleanup_close_ int coredump_fd = -1; | |
718 | struct iovec *iovec = NULL; | |
719 | size_t n_iovec = 0, n_iovec_allocated = 0, i; | |
720 | const char *context[_CONTEXT_MAX] = {}; | |
721 | int r; | |
722 | ||
723 | assert(fd >= 0); | |
724 | ||
725 | log_set_target(LOG_TARGET_AUTO); | |
726 | log_parse_environment(); | |
727 | log_open(); | |
728 | ||
729 | for (;;) { | |
730 | union { | |
731 | struct cmsghdr cmsghdr; | |
732 | uint8_t buf[CMSG_SPACE(sizeof(int))]; | |
733 | } control = {}; | |
734 | struct msghdr mh = { | |
735 | .msg_control = &control, | |
736 | .msg_controllen = sizeof(control), | |
737 | .msg_iovlen = 1, | |
738 | }; | |
739 | ssize_t n; | |
aa27b158 | 740 | ssize_t l; |
4c89c718 MP |
741 | |
742 | if (!GREEDY_REALLOC(iovec, n_iovec_allocated, n_iovec + 3)) { | |
743 | r = log_oom(); | |
744 | goto finish; | |
745 | } | |
746 | ||
aa27b158 MP |
747 | l = next_datagram_size_fd(fd); |
748 | if (l < 0) { | |
749 | r = log_error_errno(l, "Failed to determine datagram size to read: %m"); | |
4c89c718 MP |
750 | goto finish; |
751 | } | |
752 | ||
753 | assert(l >= 0); | |
754 | ||
755 | iovec[n_iovec].iov_len = l; | |
756 | iovec[n_iovec].iov_base = malloc(l + 1); | |
4c89c718 MP |
757 | if (!iovec[n_iovec].iov_base) { |
758 | r = log_oom(); | |
759 | goto finish; | |
760 | } | |
761 | ||
762 | mh.msg_iov = iovec + n_iovec; | |
763 | ||
764 | n = recvmsg(fd, &mh, MSG_NOSIGNAL|MSG_CMSG_CLOEXEC); | |
765 | if (n < 0) { | |
766 | free(iovec[n_iovec].iov_base); | |
767 | r = log_error_errno(errno, "Failed to receive datagram: %m"); | |
768 | goto finish; | |
769 | } | |
770 | ||
771 | if (n == 0) { | |
772 | struct cmsghdr *cmsg, *found = NULL; | |
773 | /* The final zero-length datagram carries the file descriptor and tells us that we're done. */ | |
774 | ||
775 | free(iovec[n_iovec].iov_base); | |
776 | ||
777 | CMSG_FOREACH(cmsg, &mh) { | |
778 | if (cmsg->cmsg_level == SOL_SOCKET && | |
779 | cmsg->cmsg_type == SCM_RIGHTS && | |
780 | cmsg->cmsg_len == CMSG_LEN(sizeof(int))) { | |
781 | assert(!found); | |
782 | found = cmsg; | |
783 | } | |
784 | } | |
785 | ||
786 | if (!found) { | |
787 | log_error("Coredump file descriptor missing."); | |
788 | r = -EBADMSG; | |
789 | goto finish; | |
790 | } | |
791 | ||
792 | assert(coredump_fd < 0); | |
793 | coredump_fd = *(int*) CMSG_DATA(found); | |
794 | break; | |
795 | } | |
796 | ||
797 | /* Add trailing NUL byte, in case these are strings */ | |
798 | ((char*) iovec[n_iovec].iov_base)[n] = 0; | |
799 | iovec[n_iovec].iov_len = (size_t) n; | |
800 | ||
801 | cmsg_close_all(&mh); | |
802 | map_context_fields(iovec + n_iovec, context); | |
803 | n_iovec++; | |
804 | } | |
805 | ||
806 | if (!GREEDY_REALLOC(iovec, n_iovec_allocated, n_iovec + 3)) { | |
807 | r = log_oom(); | |
e842803a MB |
808 | goto finish; |
809 | } | |
810 | ||
5a920b42 | 811 | /* Make sure we got all data we really need */ |
4c89c718 MP |
812 | assert(context[CONTEXT_PID]); |
813 | assert(context[CONTEXT_UID]); | |
814 | assert(context[CONTEXT_GID]); | |
815 | assert(context[CONTEXT_SIGNAL]); | |
816 | assert(context[CONTEXT_TIMESTAMP]); | |
817 | assert(context[CONTEXT_RLIMIT]); | |
818 | assert(context[CONTEXT_COMM]); | |
819 | assert(coredump_fd >= 0); | |
820 | ||
821 | r = submit_coredump(context, iovec, n_iovec_allocated, n_iovec, coredump_fd); | |
822 | ||
823 | finish: | |
824 | for (i = 0; i < n_iovec; i++) | |
825 | free(iovec[i].iov_base); | |
826 | free(iovec); | |
827 | ||
828 | return r; | |
829 | } | |
830 | ||
831 | static int send_iovec(const struct iovec iovec[], size_t n_iovec, int input_fd) { | |
832 | ||
833 | static const union sockaddr_union sa = { | |
834 | .un.sun_family = AF_UNIX, | |
835 | .un.sun_path = "/run/systemd/coredump", | |
836 | }; | |
837 | _cleanup_close_ int fd = -1; | |
838 | size_t i; | |
839 | int r; | |
840 | ||
841 | assert(iovec || n_iovec <= 0); | |
842 | assert(input_fd >= 0); | |
843 | ||
844 | fd = socket(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0); | |
845 | if (fd < 0) | |
846 | return log_error_errno(errno, "Failed to create coredump socket: %m"); | |
847 | ||
aa27b158 | 848 | if (connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) |
4c89c718 MP |
849 | return log_error_errno(errno, "Failed to connect to coredump service: %m"); |
850 | ||
851 | for (i = 0; i < n_iovec; i++) { | |
5a920b42 MP |
852 | struct msghdr mh = { |
853 | .msg_iov = (struct iovec*) iovec + i, | |
854 | .msg_iovlen = 1, | |
855 | }; | |
856 | struct iovec copy[2]; | |
857 | ||
858 | for (;;) { | |
859 | if (sendmsg(fd, &mh, MSG_NOSIGNAL) >= 0) | |
860 | break; | |
861 | ||
862 | if (errno == EMSGSIZE && mh.msg_iov[0].iov_len > 0) { | |
863 | /* This field didn't fit? That's a pity. Given that this is just metadata, | |
864 | * let's truncate the field at half, and try again. We append three dots, in | |
865 | * order to show that this is truncated. */ | |
866 | ||
867 | if (mh.msg_iov != copy) { | |
868 | /* We don't want to modify the caller's iovec, hence let's create our | |
869 | * own array, consisting of two new iovecs, where the first is a | |
870 | * (truncated) copy of what we want to send, and the second one | |
871 | * contains the trailing dots. */ | |
872 | copy[0] = iovec[i]; | |
873 | copy[1] = (struct iovec) { | |
874 | .iov_base = (char[]) { '.', '.', '.' }, | |
875 | .iov_len = 3, | |
876 | }; | |
877 | ||
878 | mh.msg_iov = copy; | |
879 | mh.msg_iovlen = 2; | |
880 | } | |
881 | ||
882 | copy[0].iov_len /= 2; /* halve it, and try again */ | |
883 | continue; | |
884 | } | |
4c89c718 | 885 | |
4c89c718 | 886 | return log_error_errno(errno, "Failed to send coredump datagram: %m"); |
5a920b42 | 887 | } |
e842803a MB |
888 | } |
889 | ||
4c89c718 MP |
890 | r = send_one_fd(fd, input_fd, 0); |
891 | if (r < 0) | |
892 | return log_error_errno(r, "Failed to send coredump fd: %m"); | |
e842803a | 893 | |
4c89c718 MP |
894 | return 0; |
895 | } | |
e842803a | 896 | |
5a920b42 | 897 | static int process_special_crash(const char *context[], int input_fd) { |
4c89c718 MP |
898 | _cleanup_close_ int coredump_fd = -1, coredump_node_fd = -1; |
899 | _cleanup_free_ char *filename = NULL; | |
900 | uint64_t coredump_size; | |
901 | int r; | |
663996b3 | 902 | |
4c89c718 MP |
903 | assert(context); |
904 | assert(input_fd >= 0); | |
663996b3 | 905 | |
5a920b42 | 906 | /* If we are pid1 or journald, we cut things short, don't write to the journal, but still create a coredump. */ |
e842803a | 907 | |
4c89c718 MP |
908 | if (arg_storage != COREDUMP_STORAGE_NONE) |
909 | arg_storage = COREDUMP_STORAGE_EXTERNAL; | |
e842803a | 910 | |
4c89c718 MP |
911 | r = save_external_coredump(context, input_fd, &filename, &coredump_node_fd, &coredump_fd, &coredump_size); |
912 | if (r < 0) | |
913 | return r; | |
e842803a | 914 | |
4c89c718 MP |
915 | r = maybe_remove_external_coredump(filename, coredump_size); |
916 | if (r < 0) | |
917 | return r; | |
e842803a | 918 | |
5a920b42 MP |
919 | log_notice("Detected coredump of the journal daemon or PID 1, diverted to %s.", filename); |
920 | ||
4c89c718 MP |
921 | return 0; |
922 | } | |
923 | ||
924 | static int process_kernel(int argc, char* argv[]) { | |
925 | ||
926 | /* The small core field we allocate on the stack, to keep things simple */ | |
927 | char | |
928 | *core_pid = NULL, *core_uid = NULL, *core_gid = NULL, *core_signal = NULL, | |
929 | *core_session = NULL, *core_exe = NULL, *core_comm = NULL, *core_cmdline = NULL, | |
930 | *core_cgroup = NULL, *core_cwd = NULL, *core_root = NULL, *core_unit = NULL, | |
931 | *core_user_unit = NULL, *core_slice = NULL, *core_timestamp = NULL, *core_rlimit = NULL; | |
932 | ||
933 | /* The larger ones we allocate on the heap */ | |
934 | _cleanup_free_ char | |
935 | *core_owner_uid = NULL, *core_open_fds = NULL, *core_proc_status = NULL, | |
936 | *core_proc_maps = NULL, *core_proc_limits = NULL, *core_proc_cgroup = NULL, *core_environ = NULL; | |
937 | ||
938 | _cleanup_free_ char *exe = NULL, *comm = NULL; | |
939 | const char *context[_CONTEXT_MAX]; | |
940 | struct iovec iovec[25]; | |
941 | size_t n_iovec = 0; | |
942 | uid_t owner_uid; | |
943 | const char *p; | |
944 | pid_t pid; | |
945 | char *t; | |
946 | int r; | |
947 | ||
948 | if (argc < CONTEXT_COMM + 1) { | |
949 | log_error("Not enough arguments passed from kernel (%i, expected %i).", argc - 1, CONTEXT_COMM + 1 - 1); | |
950 | return -EINVAL; | |
951 | } | |
952 | ||
953 | r = parse_pid(argv[CONTEXT_PID + 1], &pid); | |
954 | if (r < 0) | |
955 | return log_error_errno(r, "Failed to parse PID."); | |
956 | ||
957 | r = get_process_comm(pid, &comm); | |
958 | if (r < 0) { | |
959 | log_warning_errno(r, "Failed to get COMM, falling back to the command line: %m"); | |
960 | comm = strv_join(argv + CONTEXT_COMM + 1, " "); | |
961 | if (!comm) | |
962 | return log_oom(); | |
963 | } | |
964 | ||
965 | r = get_process_exe(pid, &exe); | |
966 | if (r < 0) | |
967 | log_warning_errno(r, "Failed to get EXE, ignoring: %m"); | |
968 | ||
969 | context[CONTEXT_PID] = argv[CONTEXT_PID + 1]; | |
970 | context[CONTEXT_UID] = argv[CONTEXT_UID + 1]; | |
971 | context[CONTEXT_GID] = argv[CONTEXT_GID + 1]; | |
972 | context[CONTEXT_SIGNAL] = argv[CONTEXT_SIGNAL + 1]; | |
973 | context[CONTEXT_TIMESTAMP] = argv[CONTEXT_TIMESTAMP + 1]; | |
974 | context[CONTEXT_RLIMIT] = argv[CONTEXT_RLIMIT + 1]; | |
975 | context[CONTEXT_COMM] = comm; | |
976 | context[CONTEXT_EXE] = exe; | |
977 | ||
978 | if (cg_pid_get_unit(pid, &t) >= 0) { | |
979 | ||
5a920b42 MP |
980 | /* If this is PID 1 disable coredump collection, we'll unlikely be able to process it later on. */ |
981 | if (streq(t, SPECIAL_INIT_SCOPE)) { | |
982 | log_notice("Due to PID 1 having crashed coredump collection will now be turned off."); | |
983 | (void) write_string_file("/proc/sys/kernel/core_pattern", "|/bin/false", 0); | |
984 | } | |
985 | ||
986 | /* Let's avoid dead-locks when processing journald and init crashes, as socket activation and logging | |
987 | * are unlikely to work then. */ | |
988 | if (STR_IN_SET(t, SPECIAL_JOURNALD_SERVICE, SPECIAL_INIT_SCOPE)) { | |
4c89c718 | 989 | free(t); |
5a920b42 | 990 | return process_special_crash(context, STDIN_FILENO); |
663996b3 MS |
991 | } |
992 | ||
e735f4d4 | 993 | core_unit = strjoina("COREDUMP_UNIT=", t); |
f47781d8 MP |
994 | free(t); |
995 | ||
4c89c718 | 996 | IOVEC_SET_STRING(iovec[n_iovec++], core_unit); |
f47781d8 | 997 | } |
663996b3 | 998 | |
4c89c718 | 999 | /* OK, now we know it's not the journal, hence we can make use of it now. */ |
663996b3 MS |
1000 | log_set_target(LOG_TARGET_JOURNAL_OR_KMSG); |
1001 | log_open(); | |
1002 | ||
4c89c718 MP |
1003 | if (cg_pid_get_user_unit(pid, &t) >= 0) { |
1004 | core_user_unit = strjoina("COREDUMP_USER_UNIT=", t); | |
1005 | free(t); | |
1006 | ||
1007 | IOVEC_SET_STRING(iovec[n_iovec++], core_user_unit); | |
1008 | } | |
1009 | ||
1010 | core_pid = strjoina("COREDUMP_PID=", context[CONTEXT_PID]); | |
1011 | IOVEC_SET_STRING(iovec[n_iovec++], core_pid); | |
663996b3 | 1012 | |
4c89c718 MP |
1013 | core_uid = strjoina("COREDUMP_UID=", context[CONTEXT_UID]); |
1014 | IOVEC_SET_STRING(iovec[n_iovec++], core_uid); | |
663996b3 | 1015 | |
4c89c718 MP |
1016 | core_gid = strjoina("COREDUMP_GID=", context[CONTEXT_GID]); |
1017 | IOVEC_SET_STRING(iovec[n_iovec++], core_gid); | |
663996b3 | 1018 | |
4c89c718 MP |
1019 | core_signal = strjoina("COREDUMP_SIGNAL=", context[CONTEXT_SIGNAL]); |
1020 | IOVEC_SET_STRING(iovec[n_iovec++], core_signal); | |
1021 | ||
1022 | core_rlimit = strjoina("COREDUMP_RLIMIT=", context[CONTEXT_RLIMIT]); | |
1023 | IOVEC_SET_STRING(iovec[n_iovec++], core_rlimit); | |
663996b3 | 1024 | |
663996b3 | 1025 | if (sd_pid_get_session(pid, &t) >= 0) { |
e735f4d4 | 1026 | core_session = strjoina("COREDUMP_SESSION=", t); |
663996b3 MS |
1027 | free(t); |
1028 | ||
4c89c718 | 1029 | IOVEC_SET_STRING(iovec[n_iovec++], core_session); |
663996b3 MS |
1030 | } |
1031 | ||
e842803a | 1032 | if (sd_pid_get_owner_uid(pid, &owner_uid) >= 0) { |
4c89c718 | 1033 | r = asprintf(&core_owner_uid, "COREDUMP_OWNER_UID=" UID_FMT, owner_uid); |
5eef597e | 1034 | if (r > 0) |
4c89c718 | 1035 | IOVEC_SET_STRING(iovec[n_iovec++], core_owner_uid); |
e842803a MB |
1036 | } |
1037 | ||
1038 | if (sd_pid_get_slice(pid, &t) >= 0) { | |
e735f4d4 | 1039 | core_slice = strjoina("COREDUMP_SLICE=", t); |
663996b3 MS |
1040 | free(t); |
1041 | ||
4c89c718 | 1042 | IOVEC_SET_STRING(iovec[n_iovec++], core_slice); |
e842803a MB |
1043 | } |
1044 | ||
1045 | if (comm) { | |
e735f4d4 | 1046 | core_comm = strjoina("COREDUMP_COMM=", comm); |
4c89c718 | 1047 | IOVEC_SET_STRING(iovec[n_iovec++], core_comm); |
e842803a MB |
1048 | } |
1049 | ||
1050 | if (exe) { | |
e735f4d4 | 1051 | core_exe = strjoina("COREDUMP_EXE=", exe); |
4c89c718 | 1052 | IOVEC_SET_STRING(iovec[n_iovec++], core_exe); |
663996b3 MS |
1053 | } |
1054 | ||
1055 | if (get_process_cmdline(pid, 0, false, &t) >= 0) { | |
e735f4d4 | 1056 | core_cmdline = strjoina("COREDUMP_CMDLINE=", t); |
663996b3 MS |
1057 | free(t); |
1058 | ||
4c89c718 | 1059 | IOVEC_SET_STRING(iovec[n_iovec++], core_cmdline); |
663996b3 MS |
1060 | } |
1061 | ||
e842803a | 1062 | if (cg_pid_get_path_shifted(pid, NULL, &t) >= 0) { |
e735f4d4 | 1063 | core_cgroup = strjoina("COREDUMP_CGROUP=", t); |
f47781d8 MP |
1064 | free(t); |
1065 | ||
4c89c718 | 1066 | IOVEC_SET_STRING(iovec[n_iovec++], core_cgroup); |
f47781d8 MP |
1067 | } |
1068 | ||
1069 | if (compose_open_fds(pid, &t) >= 0) { | |
1070 | core_open_fds = strappend("COREDUMP_OPEN_FDS=", t); | |
1071 | free(t); | |
1072 | ||
1073 | if (core_open_fds) | |
4c89c718 | 1074 | IOVEC_SET_STRING(iovec[n_iovec++], core_open_fds); |
f47781d8 MP |
1075 | } |
1076 | ||
1077 | p = procfs_file_alloca(pid, "status"); | |
1078 | if (read_full_file(p, &t, NULL) >= 0) { | |
1079 | core_proc_status = strappend("COREDUMP_PROC_STATUS=", t); | |
1080 | free(t); | |
1081 | ||
1082 | if (core_proc_status) | |
4c89c718 | 1083 | IOVEC_SET_STRING(iovec[n_iovec++], core_proc_status); |
f47781d8 MP |
1084 | } |
1085 | ||
1086 | p = procfs_file_alloca(pid, "maps"); | |
1087 | if (read_full_file(p, &t, NULL) >= 0) { | |
1088 | core_proc_maps = strappend("COREDUMP_PROC_MAPS=", t); | |
1089 | free(t); | |
1090 | ||
1091 | if (core_proc_maps) | |
4c89c718 | 1092 | IOVEC_SET_STRING(iovec[n_iovec++], core_proc_maps); |
f47781d8 MP |
1093 | } |
1094 | ||
1095 | p = procfs_file_alloca(pid, "limits"); | |
1096 | if (read_full_file(p, &t, NULL) >= 0) { | |
1097 | core_proc_limits = strappend("COREDUMP_PROC_LIMITS=", t); | |
1098 | free(t); | |
1099 | ||
1100 | if (core_proc_limits) | |
4c89c718 | 1101 | IOVEC_SET_STRING(iovec[n_iovec++], core_proc_limits); |
f47781d8 MP |
1102 | } |
1103 | ||
1104 | p = procfs_file_alloca(pid, "cgroup"); | |
1105 | if (read_full_file(p, &t, NULL) >=0) { | |
1106 | core_proc_cgroup = strappend("COREDUMP_PROC_CGROUP=", t); | |
1107 | free(t); | |
1108 | ||
1109 | if (core_proc_cgroup) | |
4c89c718 | 1110 | IOVEC_SET_STRING(iovec[n_iovec++], core_proc_cgroup); |
f47781d8 MP |
1111 | } |
1112 | ||
1113 | if (get_process_cwd(pid, &t) >= 0) { | |
e735f4d4 | 1114 | core_cwd = strjoina("COREDUMP_CWD=", t); |
f47781d8 MP |
1115 | free(t); |
1116 | ||
4c89c718 | 1117 | IOVEC_SET_STRING(iovec[n_iovec++], core_cwd); |
f47781d8 MP |
1118 | } |
1119 | ||
1120 | if (get_process_root(pid, &t) >= 0) { | |
e735f4d4 | 1121 | core_root = strjoina("COREDUMP_ROOT=", t); |
f47781d8 MP |
1122 | free(t); |
1123 | ||
4c89c718 | 1124 | IOVEC_SET_STRING(iovec[n_iovec++], core_root); |
f47781d8 MP |
1125 | } |
1126 | ||
1127 | if (get_process_environ(pid, &t) >= 0) { | |
1128 | core_environ = strappend("COREDUMP_ENVIRON=", t); | |
e842803a MB |
1129 | free(t); |
1130 | ||
f47781d8 | 1131 | if (core_environ) |
4c89c718 | 1132 | IOVEC_SET_STRING(iovec[n_iovec++], core_environ); |
e842803a MB |
1133 | } |
1134 | ||
aa27b158 | 1135 | core_timestamp = strjoina("COREDUMP_TIMESTAMP=", context[CONTEXT_TIMESTAMP], "000000"); |
4c89c718 | 1136 | IOVEC_SET_STRING(iovec[n_iovec++], core_timestamp); |
663996b3 | 1137 | |
4c89c718 | 1138 | IOVEC_SET_STRING(iovec[n_iovec++], "MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1"); |
e842803a | 1139 | |
4c89c718 MP |
1140 | assert_cc(2 == LOG_CRIT); |
1141 | IOVEC_SET_STRING(iovec[n_iovec++], "PRIORITY=2"); | |
e842803a | 1142 | |
4c89c718 | 1143 | assert(n_iovec <= ELEMENTSOF(iovec)); |
e842803a | 1144 | |
4c89c718 MP |
1145 | return send_iovec(iovec, n_iovec, STDIN_FILENO); |
1146 | } | |
e842803a | 1147 | |
4c89c718 MP |
1148 | int main(int argc, char *argv[]) { |
1149 | int r; | |
663996b3 | 1150 | |
4c89c718 MP |
1151 | /* First, log to a safe place, since we don't know what crashed and it might be journald which we'd rather not |
1152 | * log to then. */ | |
663996b3 | 1153 | |
4c89c718 MP |
1154 | log_set_target(LOG_TARGET_KMSG); |
1155 | log_open(); | |
663996b3 | 1156 | |
4c89c718 MP |
1157 | /* Make sure we never enter a loop */ |
1158 | (void) prctl(PR_SET_DUMPABLE, 0); | |
663996b3 | 1159 | |
4c89c718 MP |
1160 | /* Ignore all parse errors */ |
1161 | (void) parse_config(); | |
14228c0d | 1162 | |
4c89c718 MP |
1163 | log_debug("Selected storage '%s'.", coredump_storage_to_string(arg_storage)); |
1164 | log_debug("Selected compression %s.", yes_no(arg_compress)); | |
e842803a | 1165 | |
4c89c718 MP |
1166 | r = sd_listen_fds(false); |
1167 | if (r < 0) { | |
1168 | log_error_errno(r, "Failed to determine number of file descriptor: %m"); | |
1169 | goto finish; | |
663996b3 MS |
1170 | } |
1171 | ||
4c89c718 MP |
1172 | /* If we got an fd passed, we are running in coredumpd mode. Otherwise we are invoked from the kernel as |
1173 | * coredump handler */ | |
1174 | if (r == 0) | |
1175 | r = process_kernel(argc, argv); | |
1176 | else if (r == 1) | |
1177 | r = process_socket(SD_LISTEN_FDS_START); | |
1178 | else { | |
1179 | log_error("Received unexpected number of file descriptors."); | |
1180 | r = -EINVAL; | |
1181 | } | |
663996b3 MS |
1182 | |
1183 | finish: | |
1184 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
1185 | } |