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Commit | Line | Data |
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f5e04665 LP |
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 | |
5430f7f2 LP |
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 | |
f5e04665 LP |
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 | |
5430f7f2 | 14 | Lesser General Public License for more details. |
f5e04665 | 15 | |
5430f7f2 | 16 | You should have received a copy of the GNU Lesser General Public License |
f5e04665 LP |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
18 | ***/ | |
19 | ||
20 | #include <errno.h> | |
803a3464 LP |
21 | #include <stdio.h> |
22 | #include <sys/prctl.h> | |
cacd6403 | 23 | #include <sys/xattr.h> |
4f5dd394 | 24 | #include <unistd.h> |
f5e04665 | 25 | |
4d229b31 | 26 | #ifdef HAVE_ELFUTILS |
3c171f0b LP |
27 | #include <dwarf.h> |
28 | #include <elfutils/libdwfl.h> | |
4d229b31 UTL |
29 | #endif |
30 | ||
73a99163 | 31 | #include "sd-daemon.h" |
f11943c5 LP |
32 | #include "sd-journal.h" |
33 | #include "sd-login.h" | |
73a99163 | 34 | #include "sd-messages.h" |
4f5dd394 LP |
35 | |
36 | #include "acl-util.h" | |
b5efdb8a | 37 | #include "alloc-util.h" |
430f0182 | 38 | #include "capability-util.h" |
ba1261bc | 39 | #include "cgroup-util.h" |
4f5dd394 | 40 | #include "compress.h" |
34c10968 LP |
41 | #include "conf-parser.h" |
42 | #include "copy.h" | |
f11943c5 | 43 | #include "coredump-vacuum.h" |
a0956174 | 44 | #include "dirent-util.h" |
4f5dd394 | 45 | #include "escape.h" |
3ffd4af2 | 46 | #include "fd-util.h" |
4f5dd394 | 47 | #include "fileio.h" |
f4f15635 | 48 | #include "fs-util.h" |
afc5dbf3 | 49 | #include "io-util.h" |
b18453ed | 50 | #include "journal-importer.h" |
4f5dd394 LP |
51 | #include "log.h" |
52 | #include "macro.h" | |
0c773903 | 53 | #include "missing.h" |
4f5dd394 | 54 | #include "mkdir.h" |
6bedfcbb | 55 | #include "parse-util.h" |
0b452006 | 56 | #include "process-util.h" |
d14bcb4e | 57 | #include "signal-util.h" |
3c171f0b | 58 | #include "socket-util.h" |
4f5dd394 LP |
59 | #include "special.h" |
60 | #include "stacktrace.h" | |
8b43440b | 61 | #include "string-table.h" |
07630cea | 62 | #include "string-util.h" |
4f5dd394 | 63 | #include "strv.h" |
b1d4f8e1 | 64 | #include "user-util.h" |
4f5dd394 | 65 | #include "util.h" |
34727273 | 66 | |
34c10968 | 67 | /* The maximum size up to which we process coredumps */ |
59f448cf | 68 | #define PROCESS_SIZE_MAX ((uint64_t) (2LLU*1024LLU*1024LLU*1024LLU)) |
34c10968 | 69 | |
bdfd7b2c | 70 | /* The maximum size up to which we leave the coredump around on disk */ |
34c10968 LP |
71 | #define EXTERNAL_SIZE_MAX PROCESS_SIZE_MAX |
72 | ||
bdfd7b2c | 73 | /* The maximum size up to which we store the coredump in the journal */ |
34c10968 | 74 | #define JOURNAL_SIZE_MAX ((size_t) (767LU*1024LU*1024LU)) |
f5e04665 | 75 | |
c4aa09b0 | 76 | /* Make sure to not make this larger than the maximum journal entry |
874bc134 ZJS |
77 | * size. See DATA_SIZE_MAX in journald-native.c. */ |
78 | assert_cc(JOURNAL_SIZE_MAX <= DATA_SIZE_MAX); | |
f5e04665 LP |
79 | |
80 | enum { | |
3c171f0b LP |
81 | /* We use this as array indexes for a couple of special fields we use for naming coredumping files, and |
82 | * attaching xattrs */ | |
83 | CONTEXT_PID, | |
84 | CONTEXT_UID, | |
85 | CONTEXT_GID, | |
86 | CONTEXT_SIGNAL, | |
87 | CONTEXT_TIMESTAMP, | |
bdfd7b2c | 88 | CONTEXT_RLIMIT, |
3c171f0b LP |
89 | CONTEXT_COMM, |
90 | CONTEXT_EXE, | |
91 | _CONTEXT_MAX | |
f5e04665 LP |
92 | }; |
93 | ||
34c10968 LP |
94 | typedef enum CoredumpStorage { |
95 | COREDUMP_STORAGE_NONE, | |
96 | COREDUMP_STORAGE_EXTERNAL, | |
97 | COREDUMP_STORAGE_JOURNAL, | |
34c10968 LP |
98 | _COREDUMP_STORAGE_MAX, |
99 | _COREDUMP_STORAGE_INVALID = -1 | |
100 | } CoredumpStorage; | |
101 | ||
34c10968 LP |
102 | static const char* const coredump_storage_table[_COREDUMP_STORAGE_MAX] = { |
103 | [COREDUMP_STORAGE_NONE] = "none", | |
104 | [COREDUMP_STORAGE_EXTERNAL] = "external", | |
105 | [COREDUMP_STORAGE_JOURNAL] = "journal", | |
34c10968 LP |
106 | }; |
107 | ||
108 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(coredump_storage, CoredumpStorage); | |
8c9571d0 | 109 | static DEFINE_CONFIG_PARSE_ENUM(config_parse_coredump_storage, coredump_storage, CoredumpStorage, "Failed to parse storage setting"); |
34727273 ZJS |
110 | |
111 | static CoredumpStorage arg_storage = COREDUMP_STORAGE_EXTERNAL; | |
8c9571d0 | 112 | static bool arg_compress = true; |
59f448cf LP |
113 | static uint64_t arg_process_size_max = PROCESS_SIZE_MAX; |
114 | static uint64_t arg_external_size_max = EXTERNAL_SIZE_MAX; | |
6e2b4a69 | 115 | static uint64_t arg_journal_size_max = JOURNAL_SIZE_MAX; |
59f448cf LP |
116 | static uint64_t arg_keep_free = (uint64_t) -1; |
117 | static uint64_t arg_max_use = (uint64_t) -1; | |
34c10968 LP |
118 | |
119 | static int parse_config(void) { | |
34c10968 | 120 | static const ConfigTableItem items[] = { |
8c9571d0 LP |
121 | { "Coredump", "Storage", config_parse_coredump_storage, 0, &arg_storage }, |
122 | { "Coredump", "Compress", config_parse_bool, 0, &arg_compress }, | |
59f448cf LP |
123 | { "Coredump", "ProcessSizeMax", config_parse_iec_uint64, 0, &arg_process_size_max }, |
124 | { "Coredump", "ExternalSizeMax", config_parse_iec_uint64, 0, &arg_external_size_max }, | |
8c9571d0 | 125 | { "Coredump", "JournalSizeMax", config_parse_iec_size, 0, &arg_journal_size_max }, |
59f448cf LP |
126 | { "Coredump", "KeepFree", config_parse_iec_uint64, 0, &arg_keep_free }, |
127 | { "Coredump", "MaxUse", config_parse_iec_uint64, 0, &arg_max_use }, | |
34c10968 LP |
128 | {} |
129 | }; | |
130 | ||
43688c49 | 131 | return config_parse_many_nulstr(PKGSYSCONFDIR "/coredump.conf", |
75eb6154 | 132 | CONF_PATHS_NULSTR("systemd/coredump.conf.d"), |
301af7e4 JT |
133 | "Coredump\0", |
134 | config_item_table_lookup, items, | |
135 | false, NULL); | |
34c10968 LP |
136 | } |
137 | ||
73a99163 ZJS |
138 | static inline uint64_t storage_size_max(void) { |
139 | return arg_storage == COREDUMP_STORAGE_EXTERNAL ? arg_external_size_max : arg_journal_size_max; | |
140 | } | |
141 | ||
34c10968 LP |
142 | static int fix_acl(int fd, uid_t uid) { |
143 | ||
144 | #ifdef HAVE_ACL | |
145 | _cleanup_(acl_freep) acl_t acl = NULL; | |
146 | acl_entry_t entry; | |
147 | acl_permset_t permset; | |
709f6e46 | 148 | int r; |
34c10968 | 149 | |
b59233e6 LP |
150 | assert(fd >= 0); |
151 | ||
34c10968 LP |
152 | if (uid <= SYSTEM_UID_MAX) |
153 | return 0; | |
154 | ||
155 | /* Make sure normal users can read (but not write or delete) | |
156 | * their own coredumps */ | |
157 | ||
158 | acl = acl_get_fd(fd); | |
4a62c710 MS |
159 | if (!acl) |
160 | return log_error_errno(errno, "Failed to get ACL: %m"); | |
34c10968 LP |
161 | |
162 | if (acl_create_entry(&acl, &entry) < 0 || | |
163 | acl_set_tag_type(entry, ACL_USER) < 0 || | |
d710aaf7 ZJS |
164 | acl_set_qualifier(entry, &uid) < 0) |
165 | return log_error_errno(errno, "Failed to patch ACL: %m"); | |
34c10968 LP |
166 | |
167 | if (acl_get_permset(entry, &permset) < 0 || | |
709f6e46 MS |
168 | acl_add_perm(permset, ACL_READ) < 0) |
169 | return log_warning_errno(errno, "Failed to patch ACL: %m"); | |
170 | ||
171 | r = calc_acl_mask_if_needed(&acl); | |
172 | if (r < 0) | |
173 | return log_warning_errno(r, "Failed to patch ACL: %m"); | |
34c10968 | 174 | |
4a62c710 MS |
175 | if (acl_set_fd(fd, acl) < 0) |
176 | return log_error_errno(errno, "Failed to apply ACL: %m"); | |
34c10968 LP |
177 | #endif |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
3c171f0b | 182 | static int fix_xattr(int fd, const char *context[_CONTEXT_MAX]) { |
0cd77f97 | 183 | |
3c171f0b LP |
184 | static const char * const xattrs[_CONTEXT_MAX] = { |
185 | [CONTEXT_PID] = "user.coredump.pid", | |
186 | [CONTEXT_UID] = "user.coredump.uid", | |
187 | [CONTEXT_GID] = "user.coredump.gid", | |
188 | [CONTEXT_SIGNAL] = "user.coredump.signal", | |
189 | [CONTEXT_TIMESTAMP] = "user.coredump.timestamp", | |
190 | [CONTEXT_COMM] = "user.coredump.comm", | |
191 | [CONTEXT_EXE] = "user.coredump.exe", | |
0cd77f97 LP |
192 | }; |
193 | ||
34c10968 | 194 | int r = 0; |
0cd77f97 | 195 | unsigned i; |
34c10968 | 196 | |
b59233e6 LP |
197 | assert(fd >= 0); |
198 | ||
1eef15b1 | 199 | /* Attach some metadata to coredumps via extended |
34c10968 LP |
200 | * attributes. Just because we can. */ |
201 | ||
3c171f0b | 202 | for (i = 0; i < _CONTEXT_MAX; i++) { |
1eef15b1 ZJS |
203 | int k; |
204 | ||
3c171f0b | 205 | if (isempty(context[i]) || !xattrs[i]) |
0cd77f97 | 206 | continue; |
34c10968 | 207 | |
3c171f0b | 208 | k = fsetxattr(fd, xattrs[i], context[i], strlen(context[i]), XATTR_CREATE); |
1eef15b1 | 209 | if (k < 0 && r == 0) |
34c10968 | 210 | r = -errno; |
0cd77f97 | 211 | } |
34c10968 LP |
212 | |
213 | return r; | |
214 | } | |
215 | ||
b0b21dce | 216 | #define filename_escape(s) xescape((s), "./ ") |
34c10968 | 217 | |
0c773903 EV |
218 | static inline const char *coredump_tmpfile_name(const char *s) { |
219 | return s ? s : "(unnamed temporary file)"; | |
220 | } | |
221 | ||
b59233e6 LP |
222 | static int fix_permissions( |
223 | int fd, | |
224 | const char *filename, | |
225 | const char *target, | |
3c171f0b | 226 | const char *context[_CONTEXT_MAX], |
b59233e6 LP |
227 | uid_t uid) { |
228 | ||
03532f0a LP |
229 | int r; |
230 | ||
b59233e6 | 231 | assert(fd >= 0); |
b59233e6 | 232 | assert(target); |
3c171f0b | 233 | assert(context); |
cfd652ed ZJS |
234 | |
235 | /* Ignore errors on these */ | |
3c171f0b LP |
236 | (void) fchmod(fd, 0640); |
237 | (void) fix_acl(fd, uid); | |
238 | (void) fix_xattr(fd, context); | |
cfd652ed | 239 | |
4a62c710 | 240 | if (fsync(fd) < 0) |
0c773903 | 241 | return log_error_errno(errno, "Failed to sync coredump %s: %m", coredump_tmpfile_name(filename)); |
cfd652ed | 242 | |
03532f0a LP |
243 | r = link_tmpfile(fd, filename, target); |
244 | if (r < 0) | |
245 | return log_error_errno(r, "Failed to move coredump %s into place: %m", target); | |
cfd652ed ZJS |
246 | |
247 | return 0; | |
248 | } | |
249 | ||
59f448cf | 250 | static int maybe_remove_external_coredump(const char *filename, uint64_t size) { |
cfd652ed | 251 | |
b59233e6 | 252 | /* Returns 1 if might remove, 0 if will not remove, < 0 on error. */ |
cfd652ed | 253 | |
fc6cec86 | 254 | if (arg_storage == COREDUMP_STORAGE_EXTERNAL && |
cfd652ed ZJS |
255 | size <= arg_external_size_max) |
256 | return 0; | |
257 | ||
258 | if (!filename) | |
259 | return 1; | |
260 | ||
4a62c710 MS |
261 | if (unlink(filename) < 0 && errno != ENOENT) |
262 | return log_error_errno(errno, "Failed to unlink %s: %m", filename); | |
cfd652ed ZJS |
263 | |
264 | return 1; | |
265 | } | |
266 | ||
3c171f0b | 267 | static int make_filename(const char *context[_CONTEXT_MAX], char **ret) { |
b59233e6 | 268 | _cleanup_free_ char *c = NULL, *u = NULL, *p = NULL, *t = NULL; |
a7f7d1bd | 269 | sd_id128_t boot = {}; |
34c10968 LP |
270 | int r; |
271 | ||
3c171f0b | 272 | assert(context); |
34c10968 | 273 | |
3c171f0b | 274 | c = filename_escape(context[CONTEXT_COMM]); |
34c10968 | 275 | if (!c) |
b59233e6 | 276 | return -ENOMEM; |
34c10968 | 277 | |
3c171f0b | 278 | u = filename_escape(context[CONTEXT_UID]); |
0dc5d23c | 279 | if (!u) |
b59233e6 | 280 | return -ENOMEM; |
34c10968 LP |
281 | |
282 | r = sd_id128_get_boot(&boot); | |
b59233e6 | 283 | if (r < 0) |
34c10968 | 284 | return r; |
34c10968 | 285 | |
3c171f0b | 286 | p = filename_escape(context[CONTEXT_PID]); |
b59233e6 LP |
287 | if (!p) |
288 | return -ENOMEM; | |
289 | ||
3c171f0b | 290 | t = filename_escape(context[CONTEXT_TIMESTAMP]); |
b59233e6 LP |
291 | if (!t) |
292 | return -ENOMEM; | |
293 | ||
294 | if (asprintf(ret, | |
0dc5d23c | 295 | "/var/lib/systemd/coredump/core.%s.%s." SD_ID128_FORMAT_STR ".%s.%s000000", |
34c10968 | 296 | c, |
0dc5d23c | 297 | u, |
34c10968 LP |
298 | SD_ID128_FORMAT_VAL(boot), |
299 | p, | |
b59233e6 LP |
300 | t) < 0) |
301 | return -ENOMEM; | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
306 | static int save_external_coredump( | |
3c171f0b LP |
307 | const char *context[_CONTEXT_MAX], |
308 | int input_fd, | |
b59233e6 | 309 | char **ret_filename, |
5f3e0a74 HW |
310 | int *ret_node_fd, |
311 | int *ret_data_fd, | |
59f448cf | 312 | uint64_t *ret_size) { |
b59233e6 LP |
313 | |
314 | _cleanup_free_ char *fn = NULL, *tmp = NULL; | |
315 | _cleanup_close_ int fd = -1; | |
bdfd7b2c | 316 | uint64_t rlimit, max_size; |
b59233e6 | 317 | struct stat st; |
3c171f0b | 318 | uid_t uid; |
b59233e6 LP |
319 | int r; |
320 | ||
3c171f0b | 321 | assert(context); |
b59233e6 | 322 | assert(ret_filename); |
5f3e0a74 HW |
323 | assert(ret_node_fd); |
324 | assert(ret_data_fd); | |
b59233e6 LP |
325 | assert(ret_size); |
326 | ||
3c171f0b LP |
327 | r = parse_uid(context[CONTEXT_UID], &uid); |
328 | if (r < 0) | |
329 | return log_error_errno(r, "Failed to parse UID: %m"); | |
330 | ||
bdfd7b2c LP |
331 | r = safe_atou64(context[CONTEXT_RLIMIT], &rlimit); |
332 | if (r < 0) | |
333 | return log_error_errno(r, "Failed to parse resource limit: %s", context[CONTEXT_RLIMIT]); | |
6998b540 ZJS |
334 | if (rlimit < page_size()) { |
335 | /* Is coredumping disabled? Then don't bother saving/processing the coredump. | |
336 | * Anything below PAGE_SIZE cannot give a readable coredump (the kernel uses | |
337 | * ELF_EXEC_PAGESIZE which is not easily accessible, but is usually the same as PAGE_SIZE. */ | |
73a99163 ZJS |
338 | log_info("Resource limits disable core dumping for process %s (%s).", |
339 | context[CONTEXT_PID], context[CONTEXT_COMM]); | |
bdfd7b2c LP |
340 | return -EBADSLT; |
341 | } | |
342 | ||
343 | /* Never store more than the process configured, or than we actually shall keep or process */ | |
73a99163 | 344 | max_size = MIN(rlimit, MAX(arg_process_size_max, storage_size_max())); |
bdfd7b2c | 345 | |
3c171f0b | 346 | r = make_filename(context, &fn); |
23bbb0de MS |
347 | if (r < 0) |
348 | return log_error_errno(r, "Failed to determine coredump file name: %m"); | |
34c10968 | 349 | |
d2e54fae | 350 | mkdir_p_label("/var/lib/systemd/coredump", 0755); |
803a3464 | 351 | |
03532f0a | 352 | fd = open_tmpfile_linkable(fn, O_RDWR|O_CLOEXEC, &tmp); |
4a62c710 | 353 | if (fd < 0) |
03532f0a | 354 | return log_error_errno(fd, "Failed to create temporary file for coredump %s: %m", fn); |
803a3464 | 355 | |
bdfd7b2c | 356 | r = copy_bytes(input_fd, fd, max_size, false); |
73a99163 ZJS |
357 | if (r < 0) { |
358 | log_error_errno(r, "Cannot store coredump of %s (%s): %m", context[CONTEXT_PID], context[CONTEXT_COMM]); | |
93240d3a | 359 | goto fail; |
73a99163 ZJS |
360 | } else if (r == 1) |
361 | log_struct(LOG_INFO, | |
362 | LOG_MESSAGE("Core file was truncated to %zu bytes.", max_size), | |
363 | "SIZE_LIMIT=%zu", max_size, | |
2b044526 | 364 | "MESSAGE_ID=" SD_MESSAGE_TRUNCATED_CORE_STR, |
73a99163 | 365 | NULL); |
803a3464 | 366 | |
34c10968 | 367 | if (fstat(fd, &st) < 0) { |
73a99163 | 368 | log_error_errno(errno, "Failed to fstat core file %s: %m", coredump_tmpfile_name(tmp)); |
34c10968 LP |
369 | goto fail; |
370 | } | |
371 | ||
7849c2ac | 372 | if (lseek(fd, 0, SEEK_SET) == (off_t) -1) { |
0c773903 | 373 | log_error_errno(errno, "Failed to seek on %s: %m", coredump_tmpfile_name(tmp)); |
b59233e6 | 374 | goto fail; |
7849c2ac TA |
375 | } |
376 | ||
d89c8fdf | 377 | #if defined(HAVE_XZ) || defined(HAVE_LZ4) |
cfd652ed | 378 | /* If we will remove the coredump anyway, do not compress. */ |
6e9ef603 | 379 | if (arg_compress && !maybe_remove_external_coredump(NULL, st.st_size)) { |
cfd652ed | 380 | |
b59233e6 LP |
381 | _cleanup_free_ char *fn_compressed = NULL, *tmp_compressed = NULL; |
382 | _cleanup_close_ int fd_compressed = -1; | |
cfd652ed | 383 | |
d89c8fdf | 384 | fn_compressed = strappend(fn, COMPRESSED_EXT); |
b59233e6 | 385 | if (!fn_compressed) { |
d89c8fdf | 386 | log_oom(); |
cfd652ed ZJS |
387 | goto uncompressed; |
388 | } | |
389 | ||
03532f0a LP |
390 | fd_compressed = open_tmpfile_linkable(fn_compressed, O_RDWR|O_CLOEXEC, &tmp_compressed); |
391 | if (fd_compressed < 0) { | |
392 | log_error_errno(fd_compressed, "Failed to create temporary file for coredump %s: %m", fn_compressed); | |
b59233e6 | 393 | goto uncompressed; |
03532f0a | 394 | } |
cfd652ed | 395 | |
d89c8fdf | 396 | r = compress_stream(fd, fd_compressed, -1); |
b59233e6 | 397 | if (r < 0) { |
0c773903 | 398 | log_error_errno(r, "Failed to compress %s: %m", coredump_tmpfile_name(tmp_compressed)); |
b59233e6 LP |
399 | goto fail_compressed; |
400 | } | |
401 | ||
3c171f0b | 402 | r = fix_permissions(fd_compressed, tmp_compressed, fn_compressed, context, uid); |
cfd652ed | 403 | if (r < 0) |
b59233e6 LP |
404 | goto fail_compressed; |
405 | ||
406 | /* OK, this worked, we can get rid of the uncompressed version now */ | |
0c773903 EV |
407 | if (tmp) |
408 | unlink_noerrno(tmp); | |
cfd652ed | 409 | |
59f448cf | 410 | *ret_filename = fn_compressed; /* compressed */ |
5f3e0a74 HW |
411 | *ret_node_fd = fd_compressed; /* compressed */ |
412 | *ret_data_fd = fd; /* uncompressed */ | |
59f448cf | 413 | *ret_size = (uint64_t) st.st_size; /* uncompressed */ |
cfd652ed | 414 | |
b59233e6 | 415 | fn_compressed = NULL; |
5f3e0a74 | 416 | fd = fd_compressed = -1; |
cfd652ed ZJS |
417 | |
418 | return 0; | |
419 | ||
b59233e6 | 420 | fail_compressed: |
0c773903 EV |
421 | if (tmp_compressed) |
422 | (void) unlink(tmp_compressed); | |
34c10968 | 423 | } |
cfd652ed ZJS |
424 | |
425 | uncompressed: | |
3b1a55e1 | 426 | #endif |
5f3e0a74 | 427 | |
3c171f0b | 428 | r = fix_permissions(fd, tmp, fn, context, uid); |
cfd652ed ZJS |
429 | if (r < 0) |
430 | goto fail; | |
34c10968 LP |
431 | |
432 | *ret_filename = fn; | |
5f3e0a74 HW |
433 | *ret_data_fd = fd; |
434 | *ret_node_fd = -1; | |
59f448cf | 435 | *ret_size = (uint64_t) st.st_size; |
34c10968 LP |
436 | |
437 | fn = NULL; | |
438 | fd = -1; | |
439 | ||
440 | return 0; | |
441 | ||
442 | fail: | |
0c773903 EV |
443 | if (tmp) |
444 | (void) unlink(tmp); | |
34c10968 LP |
445 | return r; |
446 | } | |
447 | ||
448 | static int allocate_journal_field(int fd, size_t size, char **ret, size_t *ret_size) { | |
449 | _cleanup_free_ char *field = NULL; | |
450 | ssize_t n; | |
451 | ||
8d4e028f | 452 | assert(fd >= 0); |
34c10968 LP |
453 | assert(ret); |
454 | assert(ret_size); | |
455 | ||
4a62c710 MS |
456 | if (lseek(fd, 0, SEEK_SET) == (off_t) -1) |
457 | return log_warning_errno(errno, "Failed to seek: %m"); | |
803a3464 | 458 | |
34c10968 LP |
459 | field = malloc(9 + size); |
460 | if (!field) { | |
cfd652ed | 461 | log_warning("Failed to allocate memory for coredump, coredump will not be stored."); |
34c10968 LP |
462 | return -ENOMEM; |
463 | } | |
464 | ||
465 | memcpy(field, "COREDUMP=", 9); | |
466 | ||
467 | n = read(fd, field + 9, size); | |
23bbb0de MS |
468 | if (n < 0) |
469 | return log_error_errno((int) n, "Failed to read core data: %m"); | |
34c10968 LP |
470 | if ((size_t) n < size) { |
471 | log_error("Core data too short."); | |
472 | return -EIO; | |
473 | } | |
474 | ||
475 | *ret = field; | |
476 | *ret_size = size + 9; | |
477 | ||
478 | field = NULL; | |
479 | ||
480 | return 0; | |
481 | } | |
803a3464 | 482 | |
3f132692 JF |
483 | /* Joins /proc/[pid]/fd/ and /proc/[pid]/fdinfo/ into the following lines: |
484 | * 0:/dev/pts/23 | |
485 | * pos: 0 | |
486 | * flags: 0100002 | |
487 | * | |
488 | * 1:/dev/pts/23 | |
489 | * pos: 0 | |
490 | * flags: 0100002 | |
491 | * | |
492 | * 2:/dev/pts/23 | |
493 | * pos: 0 | |
494 | * flags: 0100002 | |
495 | * EOF | |
496 | */ | |
497 | static int compose_open_fds(pid_t pid, char **open_fds) { | |
4d84bc2f LP |
498 | _cleanup_closedir_ DIR *proc_fd_dir = NULL; |
499 | _cleanup_close_ int proc_fdinfo_fd = -1; | |
500 | _cleanup_free_ char *buffer = NULL; | |
3f132692 | 501 | _cleanup_fclose_ FILE *stream = NULL; |
59059b4a | 502 | const char *fddelim = "", *path; |
3f132692 | 503 | struct dirent *dent = NULL; |
4d84bc2f | 504 | size_t size = 0; |
3f132692 JF |
505 | int r = 0; |
506 | ||
507 | assert(pid >= 0); | |
508 | assert(open_fds != NULL); | |
509 | ||
59059b4a | 510 | path = procfs_file_alloca(pid, "fd"); |
3f132692 | 511 | proc_fd_dir = opendir(path); |
59059b4a ZJS |
512 | if (!proc_fd_dir) |
513 | return -errno; | |
3f132692 | 514 | |
4d84bc2f | 515 | proc_fdinfo_fd = openat(dirfd(proc_fd_dir), "../fdinfo", O_DIRECTORY|O_NOFOLLOW|O_CLOEXEC|O_PATH); |
59059b4a ZJS |
516 | if (proc_fdinfo_fd < 0) |
517 | return -errno; | |
3f132692 | 518 | |
4d84bc2f | 519 | stream = open_memstream(&buffer, &size); |
3f132692 JF |
520 | if (!stream) |
521 | return -ENOMEM; | |
522 | ||
4d84bc2f | 523 | FOREACH_DIRENT(dent, proc_fd_dir, return -errno) { |
3f132692 | 524 | _cleanup_fclose_ FILE *fdinfo = NULL; |
4d84bc2f | 525 | _cleanup_free_ char *fdname = NULL; |
59059b4a | 526 | char line[LINE_MAX]; |
4d84bc2f | 527 | int fd; |
3f132692 | 528 | |
59059b4a | 529 | r = readlinkat_malloc(dirfd(proc_fd_dir), dent->d_name, &fdname); |
3f132692 JF |
530 | if (r < 0) |
531 | return r; | |
532 | ||
533 | fprintf(stream, "%s%s:%s\n", fddelim, dent->d_name, fdname); | |
534 | fddelim = "\n"; | |
535 | ||
536 | /* Use the directory entry from /proc/[pid]/fd with /proc/[pid]/fdinfo */ | |
59059b4a ZJS |
537 | fd = openat(proc_fdinfo_fd, dent->d_name, O_NOFOLLOW|O_CLOEXEC|O_RDONLY); |
538 | if (fd < 0) | |
3f132692 JF |
539 | continue; |
540 | ||
59059b4a ZJS |
541 | fdinfo = fdopen(fd, "re"); |
542 | if (fdinfo == NULL) { | |
543 | close(fd); | |
3f132692 | 544 | continue; |
59059b4a | 545 | } |
3f132692 | 546 | |
4d84bc2f LP |
547 | FOREACH_LINE(line, fdinfo, break) { |
548 | fputs(line, stream); | |
549 | if (!endswith(line, "\n")) | |
550 | fputc('\n', stream); | |
551 | } | |
3f132692 JF |
552 | } |
553 | ||
4d84bc2f | 554 | errno = 0; |
74ca738f | 555 | stream = safe_fclose(stream); |
4d84bc2f | 556 | |
b3267152 | 557 | if (errno > 0) |
4d84bc2f LP |
558 | return -errno; |
559 | ||
560 | *open_fds = buffer; | |
561 | buffer = NULL; | |
562 | ||
3f132692 JF |
563 | return 0; |
564 | } | |
565 | ||
7ed03ce6 JF |
566 | static int get_process_ns(pid_t pid, const char *namespace, ino_t *ns) { |
567 | const char *p; | |
568 | struct stat stbuf; | |
569 | _cleanup_close_ int proc_ns_dir_fd; | |
570 | ||
571 | p = procfs_file_alloca(pid, "ns"); | |
572 | ||
573 | proc_ns_dir_fd = open(p, O_DIRECTORY | O_CLOEXEC | O_RDONLY); | |
574 | if (proc_ns_dir_fd < 0) | |
575 | return -errno; | |
576 | ||
577 | if (fstatat(proc_ns_dir_fd, namespace, &stbuf, /* flags */0) < 0) | |
578 | return -errno; | |
579 | ||
580 | *ns = stbuf.st_ino; | |
581 | return 0; | |
582 | } | |
583 | ||
584 | static int get_mount_namespace_leader(pid_t pid, pid_t *container_pid) { | |
585 | pid_t cpid = pid, ppid = 0; | |
586 | ino_t proc_mntns; | |
587 | int r = 0; | |
588 | ||
589 | r = get_process_ns(pid, "mnt", &proc_mntns); | |
590 | if (r < 0) | |
591 | return r; | |
592 | ||
aa7530d6 | 593 | for (;;) { |
7ed03ce6 JF |
594 | ino_t parent_mntns; |
595 | ||
596 | r = get_process_ppid(cpid, &ppid); | |
597 | if (r < 0) | |
598 | return r; | |
599 | ||
600 | r = get_process_ns(ppid, "mnt", &parent_mntns); | |
601 | if (r < 0) | |
602 | return r; | |
603 | ||
604 | if (proc_mntns != parent_mntns) | |
605 | break; | |
606 | ||
607 | if (ppid == 1) | |
608 | return -ENOENT; | |
609 | ||
610 | cpid = ppid; | |
611 | } | |
612 | ||
613 | *container_pid = ppid; | |
614 | return 0; | |
615 | } | |
616 | ||
617 | /* Returns 1 if the parent was found. | |
618 | * Returns 0 if there is not a process we can call the pid's | |
619 | * container parent (the pid's process isn't 'containerized'). | |
620 | * Returns a negative number on errors. | |
621 | */ | |
622 | static int get_process_container_parent_cmdline(pid_t pid, char** cmdline) { | |
623 | int r = 0; | |
624 | pid_t container_pid; | |
625 | const char *proc_root_path; | |
626 | struct stat root_stat, proc_root_stat; | |
627 | ||
628 | /* To compare inodes of / and /proc/[pid]/root */ | |
629 | if (stat("/", &root_stat) < 0) | |
630 | return -errno; | |
631 | ||
632 | proc_root_path = procfs_file_alloca(pid, "root"); | |
633 | if (stat(proc_root_path, &proc_root_stat) < 0) | |
634 | return -errno; | |
635 | ||
636 | /* The process uses system root. */ | |
637 | if (proc_root_stat.st_ino == root_stat.st_ino) { | |
638 | *cmdline = NULL; | |
639 | return 0; | |
640 | } | |
641 | ||
642 | r = get_mount_namespace_leader(pid, &container_pid); | |
643 | if (r < 0) | |
644 | return r; | |
645 | ||
d3cba4ea EV |
646 | r = get_process_cmdline(container_pid, 0, false, cmdline); |
647 | if (r < 0) | |
648 | return r; | |
649 | ||
650 | return 1; | |
7ed03ce6 JF |
651 | } |
652 | ||
3c171f0b LP |
653 | static int change_uid_gid(const char *context[]) { |
654 | uid_t uid; | |
655 | gid_t gid; | |
656 | int r; | |
34c10968 | 657 | |
3c171f0b LP |
658 | r = parse_uid(context[CONTEXT_UID], &uid); |
659 | if (r < 0) | |
660 | return r; | |
8c8549db | 661 | |
888e378d LP |
662 | if (uid <= SYSTEM_UID_MAX) { |
663 | const char *user = "systemd-coredump"; | |
664 | ||
665 | r = get_user_creds(&user, &uid, &gid, NULL, NULL); | |
666 | if (r < 0) { | |
667 | log_warning_errno(r, "Cannot resolve %s user. Proceeding to dump core as root: %m", user); | |
668 | uid = gid = 0; | |
669 | } | |
670 | } else { | |
671 | r = parse_gid(context[CONTEXT_GID], &gid); | |
672 | if (r < 0) | |
673 | return r; | |
674 | } | |
3c171f0b LP |
675 | |
676 | return drop_privileges(uid, gid, 0); | |
677 | } | |
8c8549db | 678 | |
3c171f0b LP |
679 | static int submit_coredump( |
680 | const char *context[_CONTEXT_MAX], | |
681 | struct iovec *iovec, | |
682 | size_t n_iovec_allocated, | |
683 | size_t n_iovec, | |
684 | int input_fd) { | |
34c10968 | 685 | |
5f3e0a74 | 686 | _cleanup_close_ int coredump_fd = -1, coredump_node_fd = -1; |
3c171f0b | 687 | _cleanup_free_ char *core_message = NULL, *filename = NULL, *coredump_data = NULL; |
a5ca3649 | 688 | uint64_t coredump_size = UINT64_MAX; |
3c171f0b | 689 | int r; |
f5e04665 | 690 | |
3c171f0b LP |
691 | assert(context); |
692 | assert(iovec); | |
693 | assert(n_iovec_allocated >= n_iovec + 3); | |
694 | assert(input_fd >= 0); | |
f5e04665 | 695 | |
3c171f0b LP |
696 | /* Vacuum before we write anything again */ |
697 | (void) coredump_vacuum(-1, arg_keep_free, arg_max_use); | |
803a3464 | 698 | |
3c171f0b LP |
699 | /* Always stream the coredump to disk, if that's possible */ |
700 | r = save_external_coredump(context, input_fd, &filename, &coredump_node_fd, &coredump_fd, &coredump_size); | |
701 | if (r < 0) | |
702 | /* Skip whole core dumping part */ | |
703 | goto log; | |
704 | ||
705 | /* If we don't want to keep the coredump on disk, remove it now, as later on we will lack the privileges for | |
706 | * it. However, we keep the fd to it, so that we can still process it and log it. */ | |
707 | r = maybe_remove_external_coredump(filename, coredump_size); | |
708 | if (r < 0) | |
709 | return r; | |
710 | if (r == 0) { | |
711 | const char *coredump_filename; | |
712 | ||
713 | coredump_filename = strjoina("COREDUMP_FILENAME=", filename); | |
714 | IOVEC_SET_STRING(iovec[n_iovec++], coredump_filename); | |
6e9ef603 | 715 | } else if (arg_storage == COREDUMP_STORAGE_EXTERNAL) |
5206a724 | 716 | log_info("The core will not be stored: size %"PRIu64" is greater than %"PRIu64" (the configured maximum)", |
6e9ef603 | 717 | coredump_size, arg_external_size_max); |
f5e04665 | 718 | |
3c171f0b LP |
719 | /* Vacuum again, but exclude the coredump we just created */ |
720 | (void) coredump_vacuum(coredump_node_fd >= 0 ? coredump_node_fd : coredump_fd, arg_keep_free, arg_max_use); | |
8c9571d0 | 721 | |
3c171f0b LP |
722 | /* Now, let's drop privileges to become the user who owns the segfaulted process and allocate the coredump |
723 | * memory under the user's uid. This also ensures that the credentials journald will see are the ones of the | |
724 | * coredumping user, thus making sure the user gets access to the core dump. Let's also get rid of all | |
725 | * capabilities, if we run as root, we won't need them anymore. */ | |
726 | r = change_uid_gid(context); | |
727 | if (r < 0) | |
728 | return log_error_errno(r, "Failed to drop privileges: %m"); | |
34c10968 | 729 | |
3c171f0b LP |
730 | #ifdef HAVE_ELFUTILS |
731 | /* Try to get a strack trace if we can */ | |
732 | if (coredump_size <= arg_process_size_max) { | |
733 | _cleanup_free_ char *stacktrace = NULL; | |
734 | ||
735 | r = coredump_make_stack_trace(coredump_fd, context[CONTEXT_EXE], &stacktrace); | |
736 | if (r >= 0) | |
605405c6 ZJS |
737 | core_message = strjoin("MESSAGE=Process ", context[CONTEXT_PID], |
738 | " (", context[CONTEXT_COMM], ") of user ", | |
739 | context[CONTEXT_UID], " dumped core.\n\n", | |
740 | stacktrace); | |
3c171f0b LP |
741 | else if (r == -EINVAL) |
742 | log_warning("Failed to generate stack trace: %s", dwfl_errmsg(dwfl_errno())); | |
743 | else | |
744 | log_warning_errno(r, "Failed to generate stack trace: %m"); | |
6e9ef603 | 745 | } else |
5206a724 | 746 | log_debug("Not generating stack trace: core size %"PRIu64" is greater than %"PRIu64" (the configured maximum)", |
6e9ef603 | 747 | coredump_size, arg_process_size_max); |
803a3464 | 748 | |
3c171f0b LP |
749 | if (!core_message) |
750 | #endif | |
751 | log: | |
605405c6 ZJS |
752 | core_message = strjoin("MESSAGE=Process ", context[CONTEXT_PID], " (", |
753 | context[CONTEXT_COMM], ") of user ", | |
754 | context[CONTEXT_UID], " dumped core."); | |
3c171f0b LP |
755 | if (core_message) |
756 | IOVEC_SET_STRING(iovec[n_iovec++], core_message); | |
757 | ||
758 | /* Optionally store the entire coredump in the journal */ | |
6e9ef603 ZJS |
759 | if (arg_storage == COREDUMP_STORAGE_JOURNAL) { |
760 | if (coredump_size <= arg_journal_size_max) { | |
761 | size_t sz = 0; | |
762 | ||
763 | /* Store the coredump itself in the journal */ | |
764 | ||
765 | r = allocate_journal_field(coredump_fd, (size_t) coredump_size, &coredump_data, &sz); | |
766 | if (r >= 0) { | |
767 | iovec[n_iovec].iov_base = coredump_data; | |
768 | iovec[n_iovec].iov_len = sz; | |
769 | n_iovec++; | |
770 | } else | |
771 | log_warning_errno(r, "Failed to attach the core to the journal entry: %m"); | |
772 | } else | |
5206a724 | 773 | log_info("The core will not be stored: size %"PRIu64" is greater than %"PRIu64" (the configured maximum)", |
6e9ef603 | 774 | coredump_size, arg_journal_size_max); |
f5e04665 LP |
775 | } |
776 | ||
3c171f0b LP |
777 | assert(n_iovec <= n_iovec_allocated); |
778 | ||
779 | r = sd_journal_sendv(iovec, n_iovec); | |
780 | if (r < 0) | |
781 | return log_error_errno(r, "Failed to log coredump: %m"); | |
782 | ||
783 | return 0; | |
784 | } | |
785 | ||
786 | static void map_context_fields(const struct iovec *iovec, const char *context[]) { | |
787 | ||
788 | static const char * const context_field_names[_CONTEXT_MAX] = { | |
789 | [CONTEXT_PID] = "COREDUMP_PID=", | |
790 | [CONTEXT_UID] = "COREDUMP_UID=", | |
791 | [CONTEXT_GID] = "COREDUMP_GID=", | |
792 | [CONTEXT_SIGNAL] = "COREDUMP_SIGNAL=", | |
793 | [CONTEXT_TIMESTAMP] = "COREDUMP_TIMESTAMP=", | |
794 | [CONTEXT_COMM] = "COREDUMP_COMM=", | |
795 | [CONTEXT_EXE] = "COREDUMP_EXE=", | |
bdfd7b2c | 796 | [CONTEXT_RLIMIT] = "COREDUMP_RLIMIT=", |
3c171f0b LP |
797 | }; |
798 | ||
799 | unsigned i; | |
800 | ||
801 | assert(iovec); | |
802 | assert(context); | |
803 | ||
804 | for (i = 0; i < _CONTEXT_MAX; i++) { | |
805 | size_t l; | |
806 | ||
807 | l = strlen(context_field_names[i]); | |
808 | if (iovec->iov_len < l) | |
809 | continue; | |
810 | ||
811 | if (memcmp(iovec->iov_base, context_field_names[i], l) != 0) | |
812 | continue; | |
813 | ||
814 | /* Note that these strings are NUL terminated, because we made sure that a trailing NUL byte is in the | |
815 | * buffer, though not included in the iov_len count. (see below) */ | |
816 | context[i] = (char*) iovec->iov_base + l; | |
817 | break; | |
818 | } | |
819 | } | |
820 | ||
821 | static int process_socket(int fd) { | |
822 | _cleanup_close_ int coredump_fd = -1; | |
823 | struct iovec *iovec = NULL; | |
80002f66 | 824 | size_t n_iovec = 0, n_allocated = 0, i, k; |
3c171f0b LP |
825 | const char *context[_CONTEXT_MAX] = {}; |
826 | int r; | |
827 | ||
828 | assert(fd >= 0); | |
829 | ||
830 | log_set_target(LOG_TARGET_AUTO); | |
831 | log_parse_environment(); | |
832 | log_open(); | |
833 | ||
988e89ee ZJS |
834 | log_debug("Processing coredump received on stdin..."); |
835 | ||
3c171f0b LP |
836 | for (;;) { |
837 | union { | |
838 | struct cmsghdr cmsghdr; | |
839 | uint8_t buf[CMSG_SPACE(sizeof(int))]; | |
840 | } control = {}; | |
841 | struct msghdr mh = { | |
842 | .msg_control = &control, | |
843 | .msg_controllen = sizeof(control), | |
844 | .msg_iovlen = 1, | |
845 | }; | |
846 | ssize_t n; | |
fe1ef0f8 | 847 | ssize_t l; |
3c171f0b | 848 | |
5b45a160 | 849 | if (!GREEDY_REALLOC(iovec, n_allocated, n_iovec + 3)) { |
3c171f0b LP |
850 | r = log_oom(); |
851 | goto finish; | |
852 | } | |
853 | ||
fe1ef0f8 EV |
854 | l = next_datagram_size_fd(fd); |
855 | if (l < 0) { | |
856 | r = log_error_errno(l, "Failed to determine datagram size to read: %m"); | |
3c171f0b LP |
857 | goto finish; |
858 | } | |
859 | ||
860 | assert(l >= 0); | |
861 | ||
862 | iovec[n_iovec].iov_len = l; | |
863 | iovec[n_iovec].iov_base = malloc(l + 1); | |
3c171f0b LP |
864 | if (!iovec[n_iovec].iov_base) { |
865 | r = log_oom(); | |
866 | goto finish; | |
867 | } | |
868 | ||
869 | mh.msg_iov = iovec + n_iovec; | |
870 | ||
871 | n = recvmsg(fd, &mh, MSG_NOSIGNAL|MSG_CMSG_CLOEXEC); | |
872 | if (n < 0) { | |
873 | free(iovec[n_iovec].iov_base); | |
874 | r = log_error_errno(errno, "Failed to receive datagram: %m"); | |
875 | goto finish; | |
876 | } | |
877 | ||
878 | if (n == 0) { | |
879 | struct cmsghdr *cmsg, *found = NULL; | |
880 | /* The final zero-length datagram carries the file descriptor and tells us that we're done. */ | |
881 | ||
882 | free(iovec[n_iovec].iov_base); | |
883 | ||
884 | CMSG_FOREACH(cmsg, &mh) { | |
885 | if (cmsg->cmsg_level == SOL_SOCKET && | |
886 | cmsg->cmsg_type == SCM_RIGHTS && | |
887 | cmsg->cmsg_len == CMSG_LEN(sizeof(int))) { | |
888 | assert(!found); | |
889 | found = cmsg; | |
890 | } | |
891 | } | |
892 | ||
893 | if (!found) { | |
894 | log_error("Coredump file descriptor missing."); | |
895 | r = -EBADMSG; | |
896 | goto finish; | |
897 | } | |
898 | ||
899 | assert(coredump_fd < 0); | |
900 | coredump_fd = *(int*) CMSG_DATA(found); | |
901 | break; | |
902 | } | |
903 | ||
904 | /* Add trailing NUL byte, in case these are strings */ | |
905 | ((char*) iovec[n_iovec].iov_base)[n] = 0; | |
906 | iovec[n_iovec].iov_len = (size_t) n; | |
907 | ||
908 | cmsg_close_all(&mh); | |
909 | map_context_fields(iovec + n_iovec, context); | |
910 | n_iovec++; | |
911 | } | |
912 | ||
5b45a160 | 913 | if (!GREEDY_REALLOC(iovec, n_allocated, n_iovec + 3)) { |
3c171f0b | 914 | r = log_oom(); |
34c10968 LP |
915 | goto finish; |
916 | } | |
917 | ||
61233823 | 918 | /* Make sure we got all data we really need */ |
3c171f0b LP |
919 | assert(context[CONTEXT_PID]); |
920 | assert(context[CONTEXT_UID]); | |
921 | assert(context[CONTEXT_GID]); | |
922 | assert(context[CONTEXT_SIGNAL]); | |
923 | assert(context[CONTEXT_TIMESTAMP]); | |
bdfd7b2c | 924 | assert(context[CONTEXT_RLIMIT]); |
3c171f0b LP |
925 | assert(context[CONTEXT_COMM]); |
926 | assert(coredump_fd >= 0); | |
927 | ||
80002f66 LP |
928 | /* Small quirk: the journal fields contain the timestamp padded with six zeroes, so that the kernel-supplied 1s |
929 | * granularity timestamps becomes 1µs granularity, i.e. the granularity systemd usually operates in. Since we | |
930 | * are reconstructing the original kernel context, we chop this off again, here. */ | |
931 | k = strlen(context[CONTEXT_TIMESTAMP]); | |
932 | if (k > 6) | |
933 | context[CONTEXT_TIMESTAMP] = strndupa(context[CONTEXT_TIMESTAMP], k - 6); | |
934 | ||
5b45a160 | 935 | r = submit_coredump(context, iovec, n_allocated, n_iovec, coredump_fd); |
3c171f0b LP |
936 | |
937 | finish: | |
938 | for (i = 0; i < n_iovec; i++) | |
939 | free(iovec[i].iov_base); | |
940 | free(iovec); | |
941 | ||
942 | return r; | |
943 | } | |
944 | ||
945 | static int send_iovec(const struct iovec iovec[], size_t n_iovec, int input_fd) { | |
946 | ||
947 | static const union sockaddr_union sa = { | |
948 | .un.sun_family = AF_UNIX, | |
949 | .un.sun_path = "/run/systemd/coredump", | |
950 | }; | |
951 | _cleanup_close_ int fd = -1; | |
952 | size_t i; | |
953 | int r; | |
954 | ||
955 | assert(iovec || n_iovec <= 0); | |
956 | assert(input_fd >= 0); | |
957 | ||
958 | fd = socket(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0); | |
959 | if (fd < 0) | |
960 | return log_error_errno(errno, "Failed to create coredump socket: %m"); | |
961 | ||
fc2fffe7 | 962 | if (connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) |
3c171f0b LP |
963 | return log_error_errno(errno, "Failed to connect to coredump service: %m"); |
964 | ||
965 | for (i = 0; i < n_iovec; i++) { | |
fec603eb LP |
966 | struct msghdr mh = { |
967 | .msg_iov = (struct iovec*) iovec + i, | |
968 | .msg_iovlen = 1, | |
969 | }; | |
970 | struct iovec copy[2]; | |
971 | ||
972 | for (;;) { | |
973 | if (sendmsg(fd, &mh, MSG_NOSIGNAL) >= 0) | |
974 | break; | |
975 | ||
976 | if (errno == EMSGSIZE && mh.msg_iov[0].iov_len > 0) { | |
977 | /* This field didn't fit? That's a pity. Given that this is just metadata, | |
978 | * let's truncate the field at half, and try again. We append three dots, in | |
979 | * order to show that this is truncated. */ | |
980 | ||
981 | if (mh.msg_iov != copy) { | |
982 | /* We don't want to modify the caller's iovec, hence let's create our | |
983 | * own array, consisting of two new iovecs, where the first is a | |
984 | * (truncated) copy of what we want to send, and the second one | |
985 | * contains the trailing dots. */ | |
986 | copy[0] = iovec[i]; | |
987 | copy[1] = (struct iovec) { | |
988 | .iov_base = (char[]) { '.', '.', '.' }, | |
989 | .iov_len = 3, | |
990 | }; | |
991 | ||
992 | mh.msg_iov = copy; | |
993 | mh.msg_iovlen = 2; | |
994 | } | |
995 | ||
996 | copy[0].iov_len /= 2; /* halve it, and try again */ | |
997 | continue; | |
998 | } | |
3c171f0b | 999 | |
3c171f0b | 1000 | return log_error_errno(errno, "Failed to send coredump datagram: %m"); |
fec603eb | 1001 | } |
1eef15b1 ZJS |
1002 | } |
1003 | ||
3c171f0b LP |
1004 | r = send_one_fd(fd, input_fd, 0); |
1005 | if (r < 0) | |
1006 | return log_error_errno(r, "Failed to send coredump fd: %m"); | |
1eef15b1 | 1007 | |
3c171f0b LP |
1008 | return 0; |
1009 | } | |
1eef15b1 | 1010 | |
78f043f7 | 1011 | static int process_special_crash(const char *context[], int input_fd) { |
3c171f0b LP |
1012 | _cleanup_close_ int coredump_fd = -1, coredump_node_fd = -1; |
1013 | _cleanup_free_ char *filename = NULL; | |
1014 | uint64_t coredump_size; | |
1015 | int r; | |
803a3464 | 1016 | |
3c171f0b LP |
1017 | assert(context); |
1018 | assert(input_fd >= 0); | |
803a3464 | 1019 | |
78f043f7 | 1020 | /* If we are pid1 or journald, we cut things short, don't write to the journal, but still create a coredump. */ |
34c10968 | 1021 | |
3c171f0b LP |
1022 | if (arg_storage != COREDUMP_STORAGE_NONE) |
1023 | arg_storage = COREDUMP_STORAGE_EXTERNAL; | |
34c10968 | 1024 | |
3c171f0b LP |
1025 | r = save_external_coredump(context, input_fd, &filename, &coredump_node_fd, &coredump_fd, &coredump_size); |
1026 | if (r < 0) | |
1027 | return r; | |
34c10968 | 1028 | |
3c171f0b LP |
1029 | r = maybe_remove_external_coredump(filename, coredump_size); |
1030 | if (r < 0) | |
1031 | return r; | |
34c10968 | 1032 | |
78f043f7 LP |
1033 | log_notice("Detected coredump of the journal daemon or PID 1, diverted to %s.", filename); |
1034 | ||
3c171f0b LP |
1035 | return 0; |
1036 | } | |
1037 | ||
9aa82023 ZJS |
1038 | static char* set_iovec_field(struct iovec iovec[27], size_t *n_iovec, const char *field, const char *value) { |
1039 | char *x; | |
3c171f0b | 1040 | |
9aa82023 ZJS |
1041 | x = strappend(field, value); |
1042 | if (x) | |
1043 | IOVEC_SET_STRING(iovec[(*n_iovec)++], x); | |
1044 | return x; | |
1045 | } | |
3c171f0b | 1046 | |
9aa82023 ZJS |
1047 | static char* set_iovec_field_free(struct iovec iovec[27], size_t *n_iovec, const char *field, char *value) { |
1048 | char *x; | |
1049 | ||
1050 | x = set_iovec_field(iovec, n_iovec, field, value); | |
1051 | free(value); | |
1052 | return x; | |
1053 | } | |
1054 | ||
86562420 | 1055 | static int gather_pid_metadata_and_process_special_crash( |
9aa82023 ZJS |
1056 | const char *context[_CONTEXT_MAX], |
1057 | char **comm_fallback, | |
988e89ee | 1058 | char **comm_ret, |
5b45a160 | 1059 | struct iovec *iovec, size_t *n_iovec) { |
d14bcb4e LP |
1060 | |
1061 | /* We need 26 empty slots in iovec! | |
1062 | * | |
1063 | * Note that if we fail on oom later on, we do not roll-back changes to the iovec structure. (It remains valid, | |
1064 | * with the first n_iovec fields initialized.) */ | |
3c171f0b LP |
1065 | |
1066 | _cleanup_free_ char *exe = NULL, *comm = NULL; | |
3c171f0b | 1067 | uid_t owner_uid; |
3c171f0b LP |
1068 | pid_t pid; |
1069 | char *t; | |
9aa82023 | 1070 | const char *p; |
d14bcb4e | 1071 | int r, signo; |
3c171f0b | 1072 | |
9aa82023 | 1073 | r = parse_pid(context[CONTEXT_PID], &pid); |
3c171f0b | 1074 | if (r < 0) |
988e89ee | 1075 | return log_error_errno(r, "Failed to parse PID \"%s\": %m", context[CONTEXT_PID]); |
3c171f0b LP |
1076 | |
1077 | r = get_process_comm(pid, &comm); | |
1078 | if (r < 0) { | |
1079 | log_warning_errno(r, "Failed to get COMM, falling back to the command line: %m"); | |
9aa82023 | 1080 | comm = strv_join(comm_fallback, " "); |
3c171f0b LP |
1081 | if (!comm) |
1082 | return log_oom(); | |
1083 | } | |
1084 | ||
1085 | r = get_process_exe(pid, &exe); | |
1086 | if (r < 0) | |
1087 | log_warning_errno(r, "Failed to get EXE, ignoring: %m"); | |
1088 | ||
3c171f0b LP |
1089 | if (cg_pid_get_unit(pid, &t) >= 0) { |
1090 | ||
c8091d92 LP |
1091 | /* If this is PID 1 disable coredump collection, we'll unlikely be able to process it later on. */ |
1092 | if (streq(t, SPECIAL_INIT_SCOPE)) { | |
1093 | log_notice("Due to PID 1 having crashed coredump collection will now be turned off."); | |
1094 | (void) write_string_file("/proc/sys/kernel/core_pattern", "|/bin/false", 0); | |
1095 | } | |
1096 | ||
78f043f7 LP |
1097 | /* Let's avoid dead-locks when processing journald and init crashes, as socket activation and logging |
1098 | * are unlikely to work then. */ | |
1099 | if (STR_IN_SET(t, SPECIAL_JOURNALD_SERVICE, SPECIAL_INIT_SCOPE)) { | |
3c171f0b | 1100 | free(t); |
86562420 LP |
1101 | r = process_special_crash(context, STDIN_FILENO); |
1102 | if (r < 0) | |
1103 | return r; | |
1104 | ||
1105 | return 1; /* > 0 means: we have already processed it, because it's a special crash */ | |
803a3464 LP |
1106 | } |
1107 | ||
9aa82023 | 1108 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_UNIT=", t); |
8c8549db | 1109 | } |
803a3464 | 1110 | |
3c171f0b | 1111 | /* OK, now we know it's not the journal, hence we can make use of it now. */ |
803a3464 LP |
1112 | log_set_target(LOG_TARGET_JOURNAL_OR_KMSG); |
1113 | log_open(); | |
1114 | ||
9aa82023 ZJS |
1115 | if (cg_pid_get_user_unit(pid, &t) >= 0) |
1116 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_USER_UNIT=", t); | |
3c171f0b | 1117 | |
9aa82023 ZJS |
1118 | /* The next few are mandatory */ |
1119 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_PID=", context[CONTEXT_PID])) | |
1120 | return log_oom(); | |
3c171f0b | 1121 | |
9aa82023 ZJS |
1122 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_UID=", context[CONTEXT_UID])) |
1123 | return log_oom(); | |
f5e04665 | 1124 | |
9aa82023 ZJS |
1125 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_GID=", context[CONTEXT_GID])) |
1126 | return log_oom(); | |
f5e04665 | 1127 | |
9aa82023 ZJS |
1128 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_SIGNAL=", context[CONTEXT_SIGNAL])) |
1129 | return log_oom(); | |
f5e04665 | 1130 | |
9aa82023 ZJS |
1131 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_RLIMIT=", context[CONTEXT_RLIMIT])) |
1132 | return log_oom(); | |
f5e04665 | 1133 | |
9aa82023 ZJS |
1134 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_COMM=", comm)) |
1135 | return log_oom(); | |
bdfd7b2c | 1136 | |
9aa82023 ZJS |
1137 | if (exe && |
1138 | !set_iovec_field(iovec, n_iovec, "COREDUMP_EXE=", exe)) | |
1139 | return log_oom(); | |
f5e04665 | 1140 | |
9aa82023 ZJS |
1141 | if (sd_pid_get_session(pid, &t) >= 0) |
1142 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_SESSION=", t); | |
f5e04665 | 1143 | |
a035f819 | 1144 | if (sd_pid_get_owner_uid(pid, &owner_uid) >= 0) { |
9aa82023 | 1145 | r = asprintf(&t, "COREDUMP_OWNER_UID=" UID_FMT, owner_uid); |
7de80bfe | 1146 | if (r > 0) |
9aa82023 | 1147 | IOVEC_SET_STRING(iovec[(*n_iovec)++], t); |
f5e04665 LP |
1148 | } |
1149 | ||
9aa82023 ZJS |
1150 | if (sd_pid_get_slice(pid, &t) >= 0) |
1151 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_SLICE=", t); | |
f5e04665 | 1152 | |
9aa82023 ZJS |
1153 | if (get_process_cmdline(pid, 0, false, &t) >= 0) |
1154 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CMDLINE=", t); | |
a035f819 | 1155 | |
9aa82023 ZJS |
1156 | if (cg_pid_get_path_shifted(pid, NULL, &t) >= 0) |
1157 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CGROUP=", t); | |
a035f819 | 1158 | |
9aa82023 ZJS |
1159 | if (compose_open_fds(pid, &t) >= 0) |
1160 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_OPEN_FDS=", t); | |
3f132692 JF |
1161 | |
1162 | p = procfs_file_alloca(pid, "status"); | |
9aa82023 ZJS |
1163 | if (read_full_file(p, &t, NULL) >= 0) |
1164 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_STATUS=", t); | |
3f132692 JF |
1165 | |
1166 | p = procfs_file_alloca(pid, "maps"); | |
9aa82023 ZJS |
1167 | if (read_full_file(p, &t, NULL) >= 0) |
1168 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_MAPS=", t); | |
3f132692 JF |
1169 | |
1170 | p = procfs_file_alloca(pid, "limits"); | |
9aa82023 ZJS |
1171 | if (read_full_file(p, &t, NULL) >= 0) |
1172 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_LIMITS=", t); | |
3f132692 JF |
1173 | |
1174 | p = procfs_file_alloca(pid, "cgroup"); | |
9aa82023 ZJS |
1175 | if (read_full_file(p, &t, NULL) >=0) |
1176 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_CGROUP=", t); | |
3f132692 | 1177 | |
d7032b1f | 1178 | p = procfs_file_alloca(pid, "mountinfo"); |
9aa82023 ZJS |
1179 | if (read_full_file(p, &t, NULL) >=0) |
1180 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_MOUNTINFO=", t); | |
d7032b1f | 1181 | |
9aa82023 ZJS |
1182 | if (get_process_cwd(pid, &t) >= 0) |
1183 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CWD=", t); | |
3f132692 JF |
1184 | |
1185 | if (get_process_root(pid, &t) >= 0) { | |
9aa82023 ZJS |
1186 | bool proc_self_root_is_slash; |
1187 | ||
1188 | proc_self_root_is_slash = strcmp(t, "/") == 0; | |
3f132692 | 1189 | |
9aa82023 | 1190 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_ROOT=", t); |
7ed03ce6 JF |
1191 | |
1192 | /* If the process' root is "/", then there is a chance it has | |
1193 | * mounted own root and hence being containerized. */ | |
9aa82023 ZJS |
1194 | if (proc_self_root_is_slash && get_process_container_parent_cmdline(pid, &t) > 0) |
1195 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CONTAINER_CMDLINE=", t); | |
3f132692 JF |
1196 | } |
1197 | ||
9aa82023 ZJS |
1198 | if (get_process_environ(pid, &t) >= 0) |
1199 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_ENVIRON=", t); | |
1200 | ||
1201 | t = strjoin("COREDUMP_TIMESTAMP=", context[CONTEXT_TIMESTAMP], "000000", NULL); | |
1202 | if (t) | |
1203 | IOVEC_SET_STRING(iovec[(*n_iovec)++], t); | |
1204 | ||
d14bcb4e LP |
1205 | if (safe_atoi(context[CONTEXT_SIGNAL], &signo) >= 0 && SIGNAL_VALID(signo)) |
1206 | set_iovec_field(iovec, n_iovec, "COREDUMP_SIGNAL_NAME=SIG", signal_to_string(signo)); | |
1207 | ||
988e89ee ZJS |
1208 | if (comm_ret) { |
1209 | *comm_ret = comm; | |
1210 | comm = NULL; | |
1211 | } | |
1212 | ||
86562420 | 1213 | return 0; /* == 0 means: we successfully acquired all metadata */ |
9aa82023 | 1214 | } |
3f132692 | 1215 | |
9aa82023 ZJS |
1216 | static int process_kernel(int argc, char* argv[]) { |
1217 | ||
1218 | const char *context[_CONTEXT_MAX]; | |
d14bcb4e | 1219 | struct iovec iovec[28]; |
988e89ee | 1220 | size_t i, n_iovec, n_to_free = 0; |
9aa82023 ZJS |
1221 | int r; |
1222 | ||
988e89ee ZJS |
1223 | log_debug("Processing coredump received from the kernel..."); |
1224 | ||
9aa82023 | 1225 | if (argc < CONTEXT_COMM + 1) { |
988e89ee | 1226 | log_error("Not enough arguments passed by the kernel (%i, expected %i).", argc - 1, CONTEXT_COMM + 1 - 1); |
9aa82023 | 1227 | return -EINVAL; |
3f132692 JF |
1228 | } |
1229 | ||
9aa82023 ZJS |
1230 | context[CONTEXT_PID] = argv[CONTEXT_PID + 1]; |
1231 | context[CONTEXT_UID] = argv[CONTEXT_UID + 1]; | |
1232 | context[CONTEXT_GID] = argv[CONTEXT_GID + 1]; | |
1233 | context[CONTEXT_SIGNAL] = argv[CONTEXT_SIGNAL + 1]; | |
1234 | context[CONTEXT_TIMESTAMP] = argv[CONTEXT_TIMESTAMP + 1]; | |
1235 | context[CONTEXT_RLIMIT] = argv[CONTEXT_RLIMIT + 1]; | |
1236 | ||
86562420 | 1237 | r = gather_pid_metadata_and_process_special_crash(context, argv + CONTEXT_COMM + 1, NULL, iovec, &n_to_free); |
9aa82023 ZJS |
1238 | if (r < 0) |
1239 | goto finish; | |
86562420 LP |
1240 | if (r > 0) { |
1241 | /* This was a special crash, and has already been processed. */ | |
1242 | r = 0; | |
1243 | goto finish; | |
1244 | } | |
1245 | ||
988e89ee | 1246 | n_iovec = n_to_free; |
f5e04665 | 1247 | |
2b044526 | 1248 | IOVEC_SET_STRING(iovec[n_iovec++], "MESSAGE_ID=" SD_MESSAGE_COREDUMP_STR); |
4850d39a LP |
1249 | |
1250 | assert_cc(2 == LOG_CRIT); | |
3c171f0b | 1251 | IOVEC_SET_STRING(iovec[n_iovec++], "PRIORITY=2"); |
0dc5d23c | 1252 | |
3c171f0b | 1253 | assert(n_iovec <= ELEMENTSOF(iovec)); |
34c10968 | 1254 | |
9aa82023 ZJS |
1255 | r = send_iovec(iovec, n_iovec, STDIN_FILENO); |
1256 | ||
1257 | finish: | |
1258 | for (i = 0; i < n_to_free; i++) | |
1259 | free(iovec[i].iov_base); | |
1260 | ||
1261 | return r; | |
3c171f0b | 1262 | } |
34c10968 | 1263 | |
988e89ee ZJS |
1264 | static int process_backtrace(int argc, char *argv[]) { |
1265 | const char *context[_CONTEXT_MAX]; | |
5b45a160 ZJS |
1266 | _cleanup_free_ char *comm = NULL, *message = NULL; |
1267 | _cleanup_free_ struct iovec *iovec = NULL; | |
1268 | size_t n_iovec, n_allocated, n_to_free = 0, i; | |
988e89ee | 1269 | int r; |
5b45a160 ZJS |
1270 | JournalImporter importer = { |
1271 | .fd = STDIN_FILENO, | |
1272 | }; | |
988e89ee ZJS |
1273 | |
1274 | log_debug("Processing backtrace on stdin..."); | |
1275 | ||
1276 | if (argc < CONTEXT_COMM + 1) { | |
1277 | log_error("Not enough arguments passed (%i, expected %i).", argc - 1, CONTEXT_COMM + 1 - 1); | |
1278 | return -EINVAL; | |
1279 | } | |
1280 | ||
1281 | context[CONTEXT_PID] = argv[CONTEXT_PID + 2]; | |
1282 | context[CONTEXT_UID] = argv[CONTEXT_UID + 2]; | |
1283 | context[CONTEXT_GID] = argv[CONTEXT_GID + 2]; | |
1284 | context[CONTEXT_SIGNAL] = argv[CONTEXT_SIGNAL + 2]; | |
1285 | context[CONTEXT_TIMESTAMP] = argv[CONTEXT_TIMESTAMP + 2]; | |
1286 | context[CONTEXT_RLIMIT] = argv[CONTEXT_RLIMIT + 2]; | |
1287 | ||
d14bcb4e | 1288 | n_allocated = 33; /* 25 metadata, 2 static, +unknown input, rounded up */ |
5b45a160 ZJS |
1289 | iovec = new(struct iovec, n_allocated); |
1290 | if (!iovec) | |
1291 | return log_oom(); | |
1292 | ||
86562420 | 1293 | r = gather_pid_metadata_and_process_special_crash(context, argv + CONTEXT_COMM + 2, &comm, iovec, &n_to_free); |
988e89ee ZJS |
1294 | if (r < 0) |
1295 | goto finish; | |
86562420 LP |
1296 | if (r > 0) { |
1297 | /* This was a special crash, and has already been processed. */ | |
1298 | r = 0; | |
1299 | goto finish; | |
1300 | } | |
5b45a160 | 1301 | n_iovec = n_to_free; |
988e89ee | 1302 | |
86562420 | 1303 | for (;;) { |
5b45a160 ZJS |
1304 | r = journal_importer_process_data(&importer); |
1305 | if (r < 0) { | |
1306 | log_error_errno(r, "Failed to parse journal entry on stdin: %m"); | |
1307 | goto finish; | |
1308 | } | |
1309 | if (r == 1) | |
1310 | break; | |
988e89ee | 1311 | } |
988e89ee | 1312 | |
5b45a160 ZJS |
1313 | if (!GREEDY_REALLOC(iovec, n_allocated, n_iovec + importer.iovw.count + 2)) |
1314 | return log_oom(); | |
1315 | ||
1316 | if (journal_importer_eof(&importer)) { | |
1317 | log_warning("Did not receive a full journal entry on stdin, ignoring message sent by reporter"); | |
988e89ee | 1318 | |
5b45a160 ZJS |
1319 | message = strjoin("MESSAGE=Process ", context[CONTEXT_PID], " (", comm, ")" |
1320 | " of user ", context[CONTEXT_UID], | |
1321 | " failed with ", context[CONTEXT_SIGNAL]); | |
1322 | if (!message) { | |
1323 | r = log_oom(); | |
1324 | goto finish; | |
1325 | } | |
1326 | IOVEC_SET_STRING(iovec[n_iovec++], message); | |
1327 | } else { | |
1328 | for (i = 0; i < importer.iovw.count; i++) | |
1329 | iovec[n_iovec++] = importer.iovw.iovec[i]; | |
1330 | } | |
988e89ee | 1331 | |
2b044526 | 1332 | IOVEC_SET_STRING(iovec[n_iovec++], "MESSAGE_ID=" SD_MESSAGE_BACKTRACE_STR); |
988e89ee ZJS |
1333 | assert_cc(2 == LOG_CRIT); |
1334 | IOVEC_SET_STRING(iovec[n_iovec++], "PRIORITY=2"); | |
1335 | ||
5b45a160 | 1336 | assert(n_iovec <= n_allocated); |
988e89ee ZJS |
1337 | |
1338 | r = sd_journal_sendv(iovec, n_iovec); | |
1339 | if (r < 0) | |
1340 | log_error_errno(r, "Failed to log backtrace: %m"); | |
1341 | ||
1342 | finish: | |
1343 | for (i = 0; i < n_to_free; i++) | |
1344 | free(iovec[i].iov_base); | |
1345 | ||
1346 | return r; | |
1347 | } | |
1348 | ||
3c171f0b LP |
1349 | int main(int argc, char *argv[]) { |
1350 | int r; | |
fee80f69 | 1351 | |
9aa82023 ZJS |
1352 | /* First, log to a safe place, since we don't know what crashed and it might |
1353 | * be journald which we'd rather not log to then. */ | |
8d4e028f | 1354 | |
3c171f0b LP |
1355 | log_set_target(LOG_TARGET_KMSG); |
1356 | log_open(); | |
8d4e028f | 1357 | |
3c171f0b LP |
1358 | /* Make sure we never enter a loop */ |
1359 | (void) prctl(PR_SET_DUMPABLE, 0); | |
8d4e028f | 1360 | |
3c171f0b LP |
1361 | /* Ignore all parse errors */ |
1362 | (void) parse_config(); | |
fee80f69 | 1363 | |
3c171f0b LP |
1364 | log_debug("Selected storage '%s'.", coredump_storage_to_string(arg_storage)); |
1365 | log_debug("Selected compression %s.", yes_no(arg_compress)); | |
fee80f69 | 1366 | |
3c171f0b LP |
1367 | r = sd_listen_fds(false); |
1368 | if (r < 0) { | |
1369 | log_error_errno(r, "Failed to determine number of file descriptor: %m"); | |
1370 | goto finish; | |
fee80f69 LP |
1371 | } |
1372 | ||
9aa82023 ZJS |
1373 | /* If we got an fd passed, we are running in coredumpd mode. Otherwise we |
1374 | * are invoked from the kernel as coredump handler. */ | |
988e89ee ZJS |
1375 | if (r == 0) { |
1376 | if (streq_ptr(argv[1], "--backtrace")) | |
1377 | r = process_backtrace(argc, argv); | |
1378 | else | |
1379 | r = process_kernel(argc, argv); | |
1380 | } else if (r == 1) | |
3c171f0b LP |
1381 | r = process_socket(SD_LISTEN_FDS_START); |
1382 | else { | |
1383 | log_error("Received unexpected number of file descriptors."); | |
1384 | r = -EINVAL; | |
1385 | } | |
f5e04665 LP |
1386 | |
1387 | finish: | |
f5e04665 LP |
1388 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
1389 | } |