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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
875c2e22 | 2 | |
b5efdb8a | 3 | #include "alloc-util.h" |
07630cea | 4 | #include "audit-type.h" |
0648f9be | 5 | #include "errno-util.h" |
3ffd4af2 | 6 | #include "fd-util.h" |
afc5dbf3 LP |
7 | #include "hexdecoct.h" |
8 | #include "io-util.h" | |
3ffd4af2 | 9 | #include "journald-audit.h" |
f5947a5e | 10 | #include "missing_audit.h" |
07630cea | 11 | #include "string-util.h" |
875c2e22 LP |
12 | |
13 | typedef struct MapField { | |
14 | const char *audit_field; | |
15 | const char *journal_field; | |
d3070fbd | 16 | int (*map)(const char *field, const char **p, struct iovec **iov, size_t *n_iov_allocated, size_t *n_iov); |
875c2e22 LP |
17 | } MapField; |
18 | ||
d3070fbd | 19 | static int map_simple_field(const char *field, const char **p, struct iovec **iov, size_t *n_iov_allocated, size_t *n_iov) { |
875c2e22 LP |
20 | _cleanup_free_ char *c = NULL; |
21 | size_t l = 0, allocated = 0; | |
22 | const char *e; | |
23 | ||
24 | assert(field); | |
25 | assert(p); | |
26 | assert(iov); | |
27 | assert(n_iov); | |
28 | ||
29 | l = strlen(field); | |
30 | allocated = l + 1; | |
31 | c = malloc(allocated); | |
32 | if (!c) | |
33 | return -ENOMEM; | |
34 | ||
35 | memcpy(c, field, l); | |
4c701096 | 36 | for (e = *p; !IN_SET(*e, 0, ' '); e++) { |
875c2e22 LP |
37 | if (!GREEDY_REALLOC(c, allocated, l+2)) |
38 | return -ENOMEM; | |
39 | ||
40 | c[l++] = *e; | |
41 | } | |
42 | ||
43 | c[l] = 0; | |
44 | ||
45 | if (!GREEDY_REALLOC(*iov, *n_iov_allocated, *n_iov + 1)) | |
46 | return -ENOMEM; | |
47 | ||
dde26374 | 48 | (*iov)[(*n_iov)++] = IOVEC_MAKE(c, l); |
875c2e22 LP |
49 | |
50 | *p = e; | |
51 | c = NULL; | |
52 | ||
53 | return 1; | |
54 | } | |
55 | ||
d3070fbd | 56 | static int map_string_field_internal(const char *field, const char **p, struct iovec **iov, size_t *n_iov_allocated, size_t *n_iov, bool filter_printable) { |
875c2e22 LP |
57 | _cleanup_free_ char *c = NULL; |
58 | const char *s, *e; | |
59 | size_t l; | |
60 | ||
61 | assert(field); | |
62 | assert(p); | |
63 | assert(iov); | |
64 | assert(n_iov); | |
65 | ||
66 | /* The kernel formats string fields in one of two formats. */ | |
67 | ||
68 | if (**p == '"') { | |
69 | /* Normal quoted syntax */ | |
70 | s = *p + 1; | |
71 | e = strchr(s, '"'); | |
72 | if (!e) | |
73 | return 0; | |
74 | ||
75 | l = strlen(field) + (e - s); | |
76 | c = malloc(l+1); | |
77 | if (!c) | |
78 | return -ENOMEM; | |
79 | ||
80 | *((char*) mempcpy(stpcpy(c, field), s, e - s)) = 0; | |
81 | ||
82 | e += 1; | |
83 | ||
84 | } else if (unhexchar(**p) >= 0) { | |
85 | /* Hexadecimal escaping */ | |
86 | size_t allocated = 0; | |
87 | ||
88 | l = strlen(field); | |
89 | allocated = l + 2; | |
90 | c = malloc(allocated); | |
91 | if (!c) | |
92 | return -ENOMEM; | |
93 | ||
94 | memcpy(c, field, l); | |
4c701096 | 95 | for (e = *p; !IN_SET(*e, 0, ' '); e += 2) { |
875c2e22 | 96 | int a, b; |
78fe420f | 97 | uint8_t x; |
875c2e22 LP |
98 | |
99 | a = unhexchar(e[0]); | |
100 | if (a < 0) | |
101 | return 0; | |
102 | ||
103 | b = unhexchar(e[1]); | |
104 | if (b < 0) | |
105 | return 0; | |
106 | ||
78fe420f LP |
107 | x = ((uint8_t) a << 4 | (uint8_t) b); |
108 | ||
109 | if (filter_printable && x < (uint8_t) ' ') | |
110 | x = (uint8_t) ' '; | |
111 | ||
875c2e22 LP |
112 | if (!GREEDY_REALLOC(c, allocated, l+2)) |
113 | return -ENOMEM; | |
114 | ||
78fe420f | 115 | c[l++] = (char) x; |
875c2e22 LP |
116 | } |
117 | ||
118 | c[l] = 0; | |
119 | } else | |
120 | return 0; | |
121 | ||
122 | if (!GREEDY_REALLOC(*iov, *n_iov_allocated, *n_iov + 1)) | |
123 | return -ENOMEM; | |
124 | ||
dde26374 | 125 | (*iov)[(*n_iov)++] = IOVEC_MAKE(c, l); |
875c2e22 LP |
126 | |
127 | *p = e; | |
128 | c = NULL; | |
129 | ||
130 | return 1; | |
131 | } | |
132 | ||
d3070fbd | 133 | static int map_string_field(const char *field, const char **p, struct iovec **iov, size_t *n_iov_allocated, size_t *n_iov) { |
78fe420f LP |
134 | return map_string_field_internal(field, p, iov, n_iov_allocated, n_iov, false); |
135 | } | |
136 | ||
d3070fbd | 137 | static int map_string_field_printable(const char *field, const char **p, struct iovec **iov, size_t *n_iov_allocated, size_t *n_iov) { |
78fe420f LP |
138 | return map_string_field_internal(field, p, iov, n_iov_allocated, n_iov, true); |
139 | } | |
140 | ||
d3070fbd | 141 | static int map_generic_field(const char *prefix, const char **p, struct iovec **iov, size_t *n_iov_allocated, size_t *n_iov) { |
875c2e22 LP |
142 | const char *e, *f; |
143 | char *c, *t; | |
144 | int r; | |
145 | ||
146 | /* Implements fallback mappings for all fields we don't know */ | |
147 | ||
148 | for (e = *p; e < *p + 16; e++) { | |
149 | ||
4c701096 | 150 | if (IN_SET(*e, 0, ' ')) |
875c2e22 LP |
151 | return 0; |
152 | ||
153 | if (*e == '=') | |
154 | break; | |
155 | ||
156 | if (!((*e >= 'a' && *e <= 'z') || | |
157 | (*e >= 'A' && *e <= 'Z') || | |
158 | (*e >= '0' && *e <= '9') || | |
4c701096 | 159 | IN_SET(*e, '_', '-'))) |
875c2e22 LP |
160 | return 0; |
161 | } | |
162 | ||
163 | if (e <= *p || e >= *p + 16) | |
164 | return 0; | |
165 | ||
6e9417f5 | 166 | c = newa(char, strlen(prefix) + (e - *p) + 2); |
875c2e22 LP |
167 | |
168 | t = stpcpy(c, prefix); | |
9833a66c LP |
169 | for (f = *p; f < e; f++) { |
170 | char x; | |
171 | ||
172 | if (*f >= 'a' && *f <= 'z') | |
173 | x = (*f - 'a') + 'A'; /* uppercase */ | |
174 | else if (*f == '-') | |
175 | x = '_'; /* dashes → underscores */ | |
176 | else | |
177 | x = *f; | |
178 | ||
179 | *(t++) = x; | |
180 | } | |
875c2e22 LP |
181 | strcpy(t, "="); |
182 | ||
313cefa1 | 183 | e++; |
875c2e22 LP |
184 | |
185 | r = map_simple_field(c, &e, iov, n_iov_allocated, n_iov); | |
186 | if (r < 0) | |
187 | return r; | |
188 | ||
189 | *p = e; | |
190 | return r; | |
191 | } | |
192 | ||
f131770b | 193 | /* Kernel fields are those occurring in the audit string before |
875c2e22 LP |
194 | * msg='. All of these fields are trusted, hence carry the "_" prefix. |
195 | * We try to translate the fields we know into our native names. The | |
196 | * other's are generically mapped to _AUDIT_FIELD_XYZ= */ | |
197 | static const MapField map_fields_kernel[] = { | |
198 | ||
199 | /* First, we map certain well-known audit fields into native | |
200 | * well-known fields */ | |
500cbc4e LP |
201 | { "pid=", "_PID=", map_simple_field }, |
202 | { "ppid=", "_PPID=", map_simple_field }, | |
203 | { "uid=", "_UID=", map_simple_field }, | |
204 | { "euid=", "_EUID=", map_simple_field }, | |
205 | { "fsuid=", "_FSUID=", map_simple_field }, | |
206 | { "gid=", "_GID=", map_simple_field }, | |
207 | { "egid=", "_EGID=", map_simple_field }, | |
208 | { "fsgid=", "_FSGID=", map_simple_field }, | |
209 | { "tty=", "_TTY=", map_simple_field }, | |
210 | { "ses=", "_AUDIT_SESSION=", map_simple_field }, | |
211 | { "auid=", "_AUDIT_LOGINUID=", map_simple_field }, | |
212 | { "subj=", "_SELINUX_CONTEXT=", map_simple_field }, | |
213 | { "comm=", "_COMM=", map_string_field }, | |
214 | { "exe=", "_EXE=", map_string_field }, | |
215 | { "proctitle=", "_CMDLINE=", map_string_field_printable }, | |
875c2e22 LP |
216 | |
217 | /* Some fields don't map to native well-known fields. However, | |
218 | * we know that they are string fields, hence let's undo | |
219 | * string field escaping for them, though we stick to the | |
220 | * generic field names. */ | |
500cbc4e LP |
221 | { "path=", "_AUDIT_FIELD_PATH=", map_string_field }, |
222 | { "dev=", "_AUDIT_FIELD_DEV=", map_string_field }, | |
223 | { "name=", "_AUDIT_FIELD_NAME=", map_string_field }, | |
875c2e22 LP |
224 | {} |
225 | }; | |
226 | ||
f131770b | 227 | /* Userspace fields are those occurring in the audit string after |
875c2e22 LP |
228 | * msg='. All of these fields are untrusted, hence carry no "_" |
229 | * prefix. We map the fields we don't know to AUDIT_FIELD_XYZ= */ | |
230 | static const MapField map_fields_userspace[] = { | |
500cbc4e LP |
231 | { "cwd=", "AUDIT_FIELD_CWD=", map_string_field }, |
232 | { "cmd=", "AUDIT_FIELD_CMD=", map_string_field }, | |
233 | { "acct=", "AUDIT_FIELD_ACCT=", map_string_field }, | |
234 | { "exe=", "AUDIT_FIELD_EXE=", map_string_field }, | |
235 | { "comm=", "AUDIT_FIELD_COMM=", map_string_field }, | |
875c2e22 LP |
236 | {} |
237 | }; | |
238 | ||
239 | static int map_all_fields( | |
240 | const char *p, | |
241 | const MapField map_fields[], | |
242 | const char *prefix, | |
243 | bool handle_msg, | |
244 | struct iovec **iov, | |
245 | size_t *n_iov_allocated, | |
d3070fbd | 246 | size_t *n_iov) { |
875c2e22 LP |
247 | |
248 | int r; | |
249 | ||
250 | assert(p); | |
251 | assert(iov); | |
252 | assert(n_iov_allocated); | |
253 | assert(n_iov); | |
254 | ||
255 | for (;;) { | |
256 | bool mapped = false; | |
257 | const MapField *m; | |
258 | const char *v; | |
259 | ||
260 | p += strspn(p, WHITESPACE); | |
261 | ||
262 | if (*p == 0) | |
263 | return 0; | |
264 | ||
265 | if (handle_msg) { | |
266 | v = startswith(p, "msg='"); | |
267 | if (v) { | |
6d946490 | 268 | _cleanup_free_ char *c = NULL; |
875c2e22 | 269 | const char *e; |
875c2e22 LP |
270 | |
271 | /* Userspace message. It's enclosed in | |
272 | simple quotation marks, is not | |
273 | escaped, but the last field in the | |
274 | line, hence let's remove the | |
275 | quotation mark, and apply the | |
276 | userspace mapping instead of the | |
277 | kernel mapping. */ | |
278 | ||
279 | e = endswith(v, "'"); | |
280 | if (!e) | |
281 | return 0; /* don't continue splitting up if the final quotation mark is missing */ | |
282 | ||
6d946490 YW |
283 | c = strndup(v, e - v); |
284 | if (!c) | |
285 | return -ENOMEM; | |
286 | ||
875c2e22 LP |
287 | return map_all_fields(c, map_fields_userspace, "AUDIT_FIELD_", false, iov, n_iov_allocated, n_iov); |
288 | } | |
289 | } | |
290 | ||
291 | /* Try to map the kernel fields to our own names */ | |
292 | for (m = map_fields; m->audit_field; m++) { | |
293 | v = startswith(p, m->audit_field); | |
294 | if (!v) | |
295 | continue; | |
296 | ||
297 | r = m->map(m->journal_field, &v, iov, n_iov_allocated, n_iov); | |
23bbb0de MS |
298 | if (r < 0) |
299 | return log_debug_errno(r, "Failed to parse audit array: %m"); | |
875c2e22 LP |
300 | |
301 | if (r > 0) { | |
302 | mapped = true; | |
303 | p = v; | |
304 | break; | |
305 | } | |
306 | } | |
307 | ||
308 | if (!mapped) { | |
309 | r = map_generic_field(prefix, &p, iov, n_iov_allocated, n_iov); | |
23bbb0de MS |
310 | if (r < 0) |
311 | return log_debug_errno(r, "Failed to parse audit array: %m"); | |
875c2e22 | 312 | |
ece174c5 | 313 | if (r == 0) |
875c2e22 LP |
314 | /* Couldn't process as generic field, let's just skip over it */ |
315 | p += strcspn(p, WHITESPACE); | |
875c2e22 LP |
316 | } |
317 | } | |
318 | } | |
319 | ||
090a20cf | 320 | void process_audit_string(Server *s, int type, const char *data, size_t size) { |
d3070fbd | 321 | size_t n_iov_allocated = 0, n_iov = 0, z; |
875c2e22 | 322 | _cleanup_free_ struct iovec *iov = NULL; |
875c2e22 | 323 | uint64_t seconds, msec, id; |
8bb3626d | 324 | const char *p, *type_name; |
875c2e22 LP |
325 | char id_field[sizeof("_AUDIT_ID=") + DECIMAL_STR_MAX(uint64_t)], |
326 | type_field[sizeof("_AUDIT_TYPE=") + DECIMAL_STR_MAX(int)], | |
327 | source_time_field[sizeof("_SOURCE_REALTIME_TIMESTAMP=") + DECIMAL_STR_MAX(usec_t)]; | |
14c1abcc | 328 | char *m, *type_field_name; |
d3070fbd | 329 | int k; |
875c2e22 LP |
330 | |
331 | assert(s); | |
332 | ||
333 | if (size <= 0) | |
334 | return; | |
335 | ||
336 | if (!data) | |
337 | return; | |
338 | ||
339 | /* Note that the input buffer is NUL terminated, but let's | |
340 | * check whether there is a spurious NUL byte */ | |
341 | if (memchr(data, 0, size)) | |
342 | return; | |
343 | ||
344 | p = startswith(data, "audit"); | |
345 | if (!p) | |
346 | return; | |
347 | ||
1dab14ab | 348 | k = 0; |
1fa2f38f | 349 | if (sscanf(p, "(%" PRIu64 ".%" PRIu64 ":%" PRIu64 "):%n", |
875c2e22 LP |
350 | &seconds, |
351 | &msec, | |
352 | &id, | |
1dab14ab | 353 | &k) != 3 || k == 0) |
875c2e22 LP |
354 | return; |
355 | ||
356 | p += k; | |
5034c7bc LP |
357 | p += strspn(p, WHITESPACE); |
358 | ||
359 | if (isempty(p)) | |
360 | return; | |
875c2e22 | 361 | |
14c1abcc | 362 | n_iov_allocated = N_IOVEC_META_FIELDS + 8; |
875c2e22 LP |
363 | iov = new(struct iovec, n_iov_allocated); |
364 | if (!iov) { | |
365 | log_oom(); | |
366 | return; | |
367 | } | |
368 | ||
e6a7ec4b | 369 | iov[n_iov++] = IOVEC_MAKE_STRING("_TRANSPORT=audit"); |
875c2e22 LP |
370 | |
371 | sprintf(source_time_field, "_SOURCE_REALTIME_TIMESTAMP=%" PRIu64, | |
372 | (usec_t) seconds * USEC_PER_SEC + (usec_t) msec * USEC_PER_MSEC); | |
e6a7ec4b | 373 | iov[n_iov++] = IOVEC_MAKE_STRING(source_time_field); |
875c2e22 LP |
374 | |
375 | sprintf(type_field, "_AUDIT_TYPE=%i", type); | |
e6a7ec4b | 376 | iov[n_iov++] = IOVEC_MAKE_STRING(type_field); |
875c2e22 LP |
377 | |
378 | sprintf(id_field, "_AUDIT_ID=%" PRIu64, id); | |
e6a7ec4b | 379 | iov[n_iov++] = IOVEC_MAKE_STRING(id_field); |
875c2e22 | 380 | |
d6f4302b | 381 | assert_cc(4 == LOG_FAC(LOG_AUTH)); |
e6a7ec4b LP |
382 | iov[n_iov++] = IOVEC_MAKE_STRING("SYSLOG_FACILITY=4"); |
383 | iov[n_iov++] = IOVEC_MAKE_STRING("SYSLOG_IDENTIFIER=audit"); | |
cd556b6c | 384 | |
8bb3626d ZJS |
385 | type_name = audit_type_name_alloca(type); |
386 | ||
14c1abcc JR |
387 | type_field_name = strjoina("_AUDIT_TYPE_NAME=", type_name); |
388 | iov[n_iov++] = IOVEC_MAKE_STRING(type_field_name); | |
389 | ||
8bb3626d | 390 | m = strjoina("MESSAGE=", type_name, " ", p); |
e6a7ec4b | 391 | iov[n_iov++] = IOVEC_MAKE_STRING(m); |
875c2e22 LP |
392 | |
393 | z = n_iov; | |
394 | ||
395 | map_all_fields(p, map_fields_kernel, "_AUDIT_FIELD_", true, &iov, &n_iov_allocated, &n_iov); | |
396 | ||
397 | if (!GREEDY_REALLOC(iov, n_iov_allocated, n_iov + N_IOVEC_META_FIELDS)) { | |
398 | log_oom(); | |
399 | goto finish; | |
400 | } | |
401 | ||
22e3a02b | 402 | server_dispatch_message(s, iov, n_iov, n_iov_allocated, NULL, NULL, LOG_NOTICE, 0); |
875c2e22 LP |
403 | |
404 | finish: | |
405 | /* free() all entries that map_all_fields() added. All others | |
406 | * are allocated on the stack or are constant. */ | |
407 | ||
408 | for (; z < n_iov; z++) | |
409 | free(iov[z].iov_base); | |
410 | } | |
411 | ||
412 | void server_process_audit_message( | |
413 | Server *s, | |
414 | const void *buffer, | |
415 | size_t buffer_size, | |
416 | const struct ucred *ucred, | |
875c2e22 LP |
417 | const union sockaddr_union *sa, |
418 | socklen_t salen) { | |
419 | ||
420 | const struct nlmsghdr *nl = buffer; | |
421 | ||
422 | assert(s); | |
423 | ||
424 | if (buffer_size < ALIGN(sizeof(struct nlmsghdr))) | |
425 | return; | |
426 | ||
427 | assert(buffer); | |
428 | ||
429 | /* Filter out fake data */ | |
430 | if (!sa || | |
431 | salen != sizeof(struct sockaddr_nl) || | |
432 | sa->nl.nl_family != AF_NETLINK || | |
433 | sa->nl.nl_pid != 0) { | |
434 | log_debug("Audit netlink message from invalid sender."); | |
435 | return; | |
436 | } | |
437 | ||
438 | if (!ucred || ucred->pid != 0) { | |
439 | log_debug("Audit netlink message with invalid credentials."); | |
440 | return; | |
441 | } | |
442 | ||
443 | if (!NLMSG_OK(nl, buffer_size)) { | |
444 | log_error("Audit netlink message truncated."); | |
445 | return; | |
446 | } | |
447 | ||
448 | /* Ignore special Netlink messages */ | |
449 | if (IN_SET(nl->nlmsg_type, NLMSG_NOOP, NLMSG_ERROR)) | |
450 | return; | |
451 | ||
5238e957 | 452 | /* Except AUDIT_USER, all messages below AUDIT_FIRST_USER_MSG are control messages, let's ignore those */ |
ed563b60 | 453 | if (nl->nlmsg_type < AUDIT_FIRST_USER_MSG && nl->nlmsg_type != AUDIT_USER) |
875c2e22 LP |
454 | return; |
455 | ||
0b97208d | 456 | process_audit_string(s, nl->nlmsg_type, NLMSG_DATA(nl), nl->nlmsg_len - ALIGN(sizeof(struct nlmsghdr))); |
875c2e22 LP |
457 | } |
458 | ||
4d9ced99 LP |
459 | static int enable_audit(int fd, bool b) { |
460 | struct { | |
461 | union { | |
462 | struct nlmsghdr header; | |
463 | uint8_t header_space[NLMSG_HDRLEN]; | |
464 | }; | |
465 | struct audit_status body; | |
466 | } _packed_ request = { | |
467 | .header.nlmsg_len = NLMSG_LENGTH(sizeof(struct audit_status)), | |
468 | .header.nlmsg_type = AUDIT_SET, | |
469 | .header.nlmsg_flags = NLM_F_REQUEST, | |
470 | .header.nlmsg_seq = 1, | |
471 | .header.nlmsg_pid = 0, | |
472 | .body.mask = AUDIT_STATUS_ENABLED, | |
473 | .body.enabled = b, | |
474 | }; | |
475 | union sockaddr_union sa = { | |
476 | .nl.nl_family = AF_NETLINK, | |
477 | .nl.nl_pid = 0, | |
478 | }; | |
479 | struct iovec iovec = { | |
480 | .iov_base = &request, | |
481 | .iov_len = NLMSG_LENGTH(sizeof(struct audit_status)), | |
482 | }; | |
483 | struct msghdr mh = { | |
484 | .msg_iov = &iovec, | |
485 | .msg_iovlen = 1, | |
486 | .msg_name = &sa.sa, | |
487 | .msg_namelen = sizeof(sa.nl), | |
488 | }; | |
489 | ||
490 | ssize_t n; | |
491 | ||
492 | n = sendmsg(fd, &mh, MSG_NOSIGNAL); | |
493 | if (n < 0) | |
494 | return -errno; | |
495 | if (n != NLMSG_LENGTH(sizeof(struct audit_status))) | |
496 | return -EIO; | |
497 | ||
498 | /* We don't wait for the result here, we can't do anything | |
499 | * about it anyway */ | |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
875c2e22 | 504 | int server_open_audit(Server *s) { |
875c2e22 LP |
505 | int r; |
506 | ||
507 | if (s->audit_fd < 0) { | |
508 | static const union sockaddr_union sa = { | |
509 | .nl.nl_family = AF_NETLINK, | |
510 | .nl.nl_pid = 0, | |
511 | .nl.nl_groups = AUDIT_NLGRP_READLOG, | |
512 | }; | |
513 | ||
514 | s->audit_fd = socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC|SOCK_NONBLOCK, NETLINK_AUDIT); | |
515 | if (s->audit_fd < 0) { | |
0648f9be | 516 | if (ERRNO_IS_NOT_SUPPORTED(errno)) |
875c2e22 LP |
517 | log_debug("Audit not supported in the kernel."); |
518 | else | |
56f64d95 | 519 | log_warning_errno(errno, "Failed to create audit socket, ignoring: %m"); |
875c2e22 LP |
520 | |
521 | return 0; | |
522 | } | |
523 | ||
417a7fdc LP |
524 | if (bind(s->audit_fd, &sa.sa, sizeof(sa.nl)) < 0) { |
525 | log_warning_errno(errno, | |
526 | "Failed to join audit multicast group. " | |
527 | "The kernel is probably too old or multicast reading is not supported. " | |
528 | "Ignoring: %m"); | |
529 | s->audit_fd = safe_close(s->audit_fd); | |
530 | return 0; | |
531 | } | |
875c2e22 | 532 | } else |
48440643 | 533 | (void) fd_nonblock(s->audit_fd, true); |
875c2e22 | 534 | |
2ff48e98 | 535 | r = setsockopt_int(s->audit_fd, SOL_SOCKET, SO_PASSCRED, true); |
4a62c710 | 536 | if (r < 0) |
2ff48e98 | 537 | return log_error_errno(r, "Failed to set SO_PASSCRED on audit socket: %m"); |
875c2e22 | 538 | |
8531ae70 | 539 | r = sd_event_add_io(s->event, &s->audit_event_source, s->audit_fd, EPOLLIN, server_process_datagram, s); |
23bbb0de MS |
540 | if (r < 0) |
541 | return log_error_errno(r, "Failed to add audit fd to event loop: %m"); | |
875c2e22 | 542 | |
511e03a3 LP |
543 | if (s->set_audit >= 0) { |
544 | /* We are listening now, try to enable audit if configured so */ | |
545 | r = enable_audit(s->audit_fd, s->set_audit); | |
546 | if (r < 0) | |
547 | log_warning_errno(r, "Failed to issue audit enable call: %m"); | |
548 | else if (s->set_audit > 0) | |
549 | log_debug("Auditing in kernel turned on."); | |
550 | else | |
551 | log_debug("Auditing in kernel turned off."); | |
552 | } | |
4d9ced99 | 553 | |
875c2e22 LP |
554 | return 0; |
555 | } |