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Commit | Line | Data |
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5ef05369 KZ |
1 | /* |
2 | * dmesg.c -- Print out the contents of the kernel ring buffer | |
7eda085c | 3 | * |
5ef05369 KZ |
4 | * Copyright (C) 1993 Theodore Ts'o <tytso@athena.mit.edu> |
5 | * Copyright (C) 2011 Karel Zak <kzak@redhat.com> | |
6 | * | |
7 | * This program comes with ABSOLUTELY NO WARRANTY. | |
6dbe3af9 | 8 | */ |
6dbe3af9 KZ |
9 | #include <stdio.h> |
10 | #include <getopt.h> | |
fd6b7a7f | 11 | #include <stdlib.h> |
15673c15 | 12 | #include <sys/klog.h> |
f06ec64f | 13 | #include <sys/syslog.h> |
bd304d92 | 14 | #include <sys/time.h> |
42fac79a | 15 | #include <sys/sysinfo.h> |
15103c4b | 16 | #include <ctype.h> |
bd304d92 | 17 | #include <time.h> |
c672220f KZ |
18 | #include <sys/mman.h> |
19 | #include <sys/types.h> | |
20 | #include <sys/stat.h> | |
21 | #include <unistd.h> | |
22 | #include <fcntl.h> | |
5423ccb1 | 23 | |
15103c4b | 24 | #include "c.h" |
098ce273 | 25 | #include "colors.h" |
5423ccb1 | 26 | #include "nls.h" |
15673c15 | 27 | #include "strutils.h" |
15103c4b | 28 | #include "xalloc.h" |
b8300c0a | 29 | #include "widechar.h" |
e12c9866 | 30 | #include "all-io.h" |
636a6207 | 31 | #include "bitops.h" |
efb8854f | 32 | #include "closestream.h" |
94920134 | 33 | #include "optutils.h" |
d12d063b | 34 | #include "timeutils.h" |
cd2876d2 | 35 | #include "monotonic.h" |
ddca870a | 36 | #include "mangle.h" |
aa192520 | 37 | #include "pager.h" |
506b5451 | 38 | #include "jsonwrt.h" |
6dbe3af9 | 39 | |
59a14899 KZ |
40 | /* Close the log. Currently a NOP. */ |
41 | #define SYSLOG_ACTION_CLOSE 0 | |
42 | /* Open the log. Currently a NOP. */ | |
43 | #define SYSLOG_ACTION_OPEN 1 | |
44 | /* Read from the log. */ | |
45 | #define SYSLOG_ACTION_READ 2 | |
46 | /* Read all messages remaining in the ring buffer. (allowed for non-root) */ | |
47 | #define SYSLOG_ACTION_READ_ALL 3 | |
48 | /* Read and clear all messages remaining in the ring buffer */ | |
49 | #define SYSLOG_ACTION_READ_CLEAR 4 | |
50 | /* Clear ring buffer. */ | |
51 | #define SYSLOG_ACTION_CLEAR 5 | |
52 | /* Disable printk's to console */ | |
53 | #define SYSLOG_ACTION_CONSOLE_OFF 6 | |
54 | /* Enable printk's to console */ | |
55 | #define SYSLOG_ACTION_CONSOLE_ON 7 | |
56 | /* Set level of messages printed to console */ | |
57 | #define SYSLOG_ACTION_CONSOLE_LEVEL 8 | |
58 | /* Return number of unread characters in the log buffer */ | |
59 | #define SYSLOG_ACTION_SIZE_UNREAD 9 | |
60 | /* Return size of the log buffer */ | |
61 | #define SYSLOG_ACTION_SIZE_BUFFER 10 | |
62 | ||
5aaee63c | 63 | /* |
f4bc7f96 | 64 | * Color scheme |
5aaee63c | 65 | */ |
f4bc7f96 KZ |
66 | struct dmesg_color { |
67 | const char *scheme; /* name used in termina-colors.d/dmesg.scheme */ | |
68 | const char *dflt; /* default color ESC sequence */ | |
69 | }; | |
70 | ||
71 | enum { | |
72 | DMESG_COLOR_SUBSYS, | |
73 | DMESG_COLOR_TIME, | |
33ecab2b | 74 | DMESG_COLOR_TIMEBREAK, |
f4bc7f96 KZ |
75 | DMESG_COLOR_ALERT, |
76 | DMESG_COLOR_CRIT, | |
77 | DMESG_COLOR_ERR, | |
78 | DMESG_COLOR_WARN, | |
79 | DMESG_COLOR_SEGFAULT | |
80 | }; | |
81 | ||
82 | static const struct dmesg_color colors[] = | |
83 | { | |
84 | [DMESG_COLOR_SUBSYS] = { "subsys", UL_COLOR_BROWN }, | |
85 | [DMESG_COLOR_TIME] = { "time", UL_COLOR_GREEN }, | |
33ecab2b | 86 | [DMESG_COLOR_TIMEBREAK] = { "timebreak",UL_COLOR_GREEN UL_COLOR_BOLD }, |
f4bc7f96 KZ |
87 | [DMESG_COLOR_ALERT] = { "alert", UL_COLOR_REVERSE UL_COLOR_RED }, |
88 | [DMESG_COLOR_CRIT] = { "crit", UL_COLOR_BOLD UL_COLOR_RED }, | |
89 | [DMESG_COLOR_ERR] = { "err", UL_COLOR_RED }, | |
90 | [DMESG_COLOR_WARN] = { "warn", UL_COLOR_BOLD }, | |
91 | [DMESG_COLOR_SEGFAULT] = { "segfault", UL_COLOR_HALFBRIGHT UL_COLOR_RED } | |
92 | }; | |
93 | ||
94 | #define dmesg_enable_color(_id) \ | |
95 | color_scheme_enable(colors[_id].scheme, colors[_id].dflt); | |
5aaee63c | 96 | |
f06ec64f | 97 | /* |
5ef05369 | 98 | * Priority and facility names |
f06ec64f KZ |
99 | */ |
100 | struct dmesg_name { | |
101 | const char *name; | |
102 | const char *help; | |
103 | }; | |
104 | ||
5ef05369 KZ |
105 | /* |
106 | * Priority names -- based on sys/syslog.h | |
107 | */ | |
f06ec64f KZ |
108 | static const struct dmesg_name level_names[] = |
109 | { | |
110 | [LOG_EMERG] = { "emerg", N_("system is unusable") }, | |
111 | [LOG_ALERT] = { "alert", N_("action must be taken immediately") }, | |
112 | [LOG_CRIT] = { "crit", N_("critical conditions") }, | |
113 | [LOG_ERR] = { "err", N_("error conditions") }, | |
114 | [LOG_WARNING] = { "warn", N_("warning conditions") }, | |
115 | [LOG_NOTICE] = { "notice",N_("normal but significant condition") }, | |
116 | [LOG_INFO] = { "info", N_("informational") }, | |
117 | [LOG_DEBUG] = { "debug", N_("debug-level messages") } | |
118 | }; | |
119 | ||
85f3cc55 KZ |
120 | /* |
121 | * sys/syslog.h uses (f << 3) for all facility codes. | |
9e930041 | 122 | * We want to use the codes as array indexes, so shift back... |
85f3cc55 KZ |
123 | * |
124 | * Note that libc LOG_FAC() macro returns the base codes, not the | |
125 | * shifted code :-) | |
126 | */ | |
127 | #define FAC_BASE(f) ((f) >> 3) | |
128 | ||
129 | static const struct dmesg_name facility_names[] = | |
130 | { | |
131 | [FAC_BASE(LOG_KERN)] = { "kern", N_("kernel messages") }, | |
132 | [FAC_BASE(LOG_USER)] = { "user", N_("random user-level messages") }, | |
133 | [FAC_BASE(LOG_MAIL)] = { "mail", N_("mail system") }, | |
134 | [FAC_BASE(LOG_DAEMON)] = { "daemon", N_("system daemons") }, | |
135 | [FAC_BASE(LOG_AUTH)] = { "auth", N_("security/authorization messages") }, | |
136 | [FAC_BASE(LOG_SYSLOG)] = { "syslog", N_("messages generated internally by syslogd") }, | |
137 | [FAC_BASE(LOG_LPR)] = { "lpr", N_("line printer subsystem") }, | |
138 | [FAC_BASE(LOG_NEWS)] = { "news", N_("network news subsystem") }, | |
139 | [FAC_BASE(LOG_UUCP)] = { "uucp", N_("UUCP subsystem") }, | |
140 | [FAC_BASE(LOG_CRON)] = { "cron", N_("clock daemon") }, | |
141 | [FAC_BASE(LOG_AUTHPRIV)] = { "authpriv", N_("security/authorization messages (private)") }, | |
4df28845 | 142 | [FAC_BASE(LOG_FTP)] = { "ftp", N_("FTP daemon") }, |
85f3cc55 KZ |
143 | }; |
144 | ||
e6471b9f KZ |
145 | /* supported methods to read message buffer |
146 | */ | |
147 | enum { | |
7af23060 | 148 | DMESG_METHOD_KMSG, /* read messages from /dev/kmsg (default) */ |
e6471b9f KZ |
149 | DMESG_METHOD_SYSLOG, /* klogctl() buffer */ |
150 | DMESG_METHOD_MMAP /* mmap file with records (see --file) */ | |
151 | }; | |
152 | ||
776eabe7 SK |
153 | enum { |
154 | DMESG_TIMEFTM_NONE = 0, | |
155 | DMESG_TIMEFTM_CTIME, /* [ctime] */ | |
156 | DMESG_TIMEFTM_CTIME_DELTA, /* [ctime <delta>] */ | |
157 | DMESG_TIMEFTM_DELTA, /* [<delta>] */ | |
158 | DMESG_TIMEFTM_RELTIME, /* [relative] */ | |
159 | DMESG_TIMEFTM_TIME, /* [time] */ | |
8a8be309 SK |
160 | DMESG_TIMEFTM_TIME_DELTA, /* [time <delta>] */ |
161 | DMESG_TIMEFTM_ISO8601 /* 2013-06-13T22:11:00,123456+0100 */ | |
776eabe7 | 162 | }; |
15a1e371 | 163 | #define is_timefmt(c, f) ((c)->time_fmt == (DMESG_TIMEFTM_ ##f)) |
776eabe7 | 164 | |
aca1633a KZ |
165 | struct dmesg_control { |
166 | /* bit arrays -- see include/bitops.h */ | |
167 | char levels[ARRAY_SIZE(level_names) / NBBY + 1]; | |
168 | char facilities[ARRAY_SIZE(facility_names) / NBBY + 1]; | |
169 | ||
bd304d92 | 170 | struct timeval lasttime; /* last printed timestamp */ |
60464b1f | 171 | struct tm lasttm; /* last localtime */ |
3c5384d0 | 172 | struct timeval boot_time; /* system boot time */ |
aa1c7a76 | 173 | time_t suspended_time; /* time spent in suspended state */ |
bd304d92 | 174 | |
e6471b9f KZ |
175 | int action; /* SYSLOG_ACTION_* */ |
176 | int method; /* DMESG_METHOD_* */ | |
298a073c KZ |
177 | |
178 | size_t bufsize; /* size of syslog buffer */ | |
179 | ||
7af23060 | 180 | int kmsg; /* /dev/kmsg file descriptor */ |
298a073c KZ |
181 | ssize_t kmsg_first_read;/* initial read() return code */ |
182 | char kmsg_buf[BUFSIZ];/* buffer to read kmsg data */ | |
e6471b9f | 183 | |
732d7594 KZ |
184 | time_t since; /* filter records by time */ |
185 | time_t until; /* filter records by time */ | |
186 | ||
c672220f KZ |
187 | /* |
188 | * For the --file option we mmap whole file. The unnecessary (already | |
189 | * printed) pages are always unmapped. The result is that we have in | |
455fe9a0 | 190 | * memory only the currently used page(s). |
c672220f | 191 | */ |
9b3a6984 | 192 | char *filename; |
c672220f KZ |
193 | char *mmap_buff; |
194 | size_t pagesize; | |
776eabe7 | 195 | unsigned int time_fmt; /* time format */ |
c672220f | 196 | |
506b5451 KZ |
197 | struct ul_jsonwrt jfmt; /* -J formatting */ |
198 | ||
0fd12a96 | 199 | unsigned int follow:1, /* wait for new messages */ |
d7881b0e | 200 | end:1, /* seek to the of buffer */ |
0fd12a96 | 201 | raw:1, /* raw mode */ |
646bba41 | 202 | noesc:1, /* no escape */ |
9feec79c KZ |
203 | fltr_lev:1, /* filter out by levels[] */ |
204 | fltr_fac:1, /* filter out by facilities[] */ | |
205 | decode:1, /* use "facility: level: " prefix */ | |
aa192520 | 206 | pager:1, /* pipe output into a pager */ |
5f538ac4 | 207 | color:1, /* colorize messages */ |
506b5451 | 208 | json:1, /* JSON output */ |
5f538ac4 PB |
209 | force_prefix:1; /* force timestamp and decode prefix |
210 | on each line */ | |
b45c3da2 | 211 | int indent; /* due to timestamps if newline */ |
aca1633a | 212 | }; |
f4fa5b44 | 213 | |
a7ee94f2 KZ |
214 | struct dmesg_record { |
215 | const char *mesg; | |
216 | size_t mesg_size; | |
217 | ||
218 | int level; | |
219 | int facility; | |
bd304d92 | 220 | struct timeval tv; |
a7ee94f2 KZ |
221 | |
222 | const char *next; /* buffer with next unparsed record */ | |
223 | size_t next_size; /* size of the next buffer */ | |
224 | }; | |
225 | ||
ddca870a KZ |
226 | #define INIT_DMESG_RECORD(_r) do { \ |
227 | (_r)->mesg = NULL; \ | |
228 | (_r)->mesg_size = 0; \ | |
229 | (_r)->facility = -1; \ | |
230 | (_r)->level = -1; \ | |
231 | (_r)->tv.tv_sec = 0; \ | |
232 | (_r)->tv.tv_usec = 0; \ | |
233 | } while (0) | |
234 | ||
235 | static int read_kmsg(struct dmesg_control *ctl); | |
236 | ||
5aaee63c | 237 | static int set_level_color(int log_level, const char *mesg, size_t mesgsz) |
098ce273 | 238 | { |
f4bc7f96 KZ |
239 | int id = -1; |
240 | ||
098ce273 OO |
241 | switch (log_level) { |
242 | case LOG_ALERT: | |
f4bc7f96 KZ |
243 | id = DMESG_COLOR_ALERT; |
244 | break; | |
098ce273 | 245 | case LOG_CRIT: |
f4bc7f96 KZ |
246 | id = DMESG_COLOR_CRIT; |
247 | break; | |
098ce273 | 248 | case LOG_ERR: |
f4bc7f96 KZ |
249 | id = DMESG_COLOR_ERR; |
250 | break; | |
5aaee63c | 251 | case LOG_WARNING: |
f4bc7f96 KZ |
252 | id = DMESG_COLOR_WARN; |
253 | break; | |
098ce273 OO |
254 | default: |
255 | break; | |
256 | } | |
257 | ||
9e930041 | 258 | /* well, sometimes the messages contains important keywords, but in |
5aaee63c KZ |
259 | * non-warning/error messages |
260 | */ | |
f4bc7f96 KZ |
261 | if (id < 0 && memmem(mesg, mesgsz, "segfault at", 11)) |
262 | id = DMESG_COLOR_SEGFAULT; | |
5aaee63c | 263 | |
f4bc7f96 KZ |
264 | if (id >= 0) |
265 | dmesg_enable_color(id); | |
266 | ||
267 | return id >= 0 ? 0 : -1; | |
098ce273 | 268 | } |
ddca870a | 269 | |
6e1eda6f | 270 | static void __attribute__((__noreturn__)) usage(void) |
15103c4b | 271 | { |
6e1eda6f | 272 | FILE *out = stdout; |
738767b9 | 273 | size_t i; |
f06ec64f | 274 | |
fbbc4c88 SK |
275 | fputs(USAGE_HEADER, out); |
276 | fprintf(out, _(" %s [options]\n"), program_invocation_short_name); | |
451dbcfa BS |
277 | |
278 | fputs(USAGE_SEPARATOR, out); | |
279 | fputs(_("Display or control the kernel ring buffer.\n"), out); | |
280 | ||
fbbc4c88 SK |
281 | fputs(USAGE_OPTIONS, out); |
282 | fputs(_(" -C, --clear clear the kernel ring buffer\n"), out); | |
283 | fputs(_(" -c, --read-clear read and clear all messages\n"), out); | |
284 | fputs(_(" -D, --console-off disable printing messages to console\n"), out); | |
fbbc4c88 SK |
285 | fputs(_(" -E, --console-on enable printing messages to console\n"), out); |
286 | fputs(_(" -F, --file <file> use the file instead of the kernel log buffer\n"), out); | |
287 | fputs(_(" -f, --facility <list> restrict output to defined facilities\n"), out); | |
f0a3a1ca | 288 | fputs(_(" -H, --human human readable output\n"), out); |
506b5451 | 289 | fputs(_(" -J, --json use JSON output format\n"), out); |
fbbc4c88 | 290 | fputs(_(" -k, --kernel display kernel messages\n"), out); |
a7466bdc SK |
291 | fprintf(out, |
292 | _(" -L, --color[=<when>] colorize messages (%s, %s or %s)\n"), "auto", "always", "never"); | |
5d51dc2a KZ |
293 | fprintf(out, |
294 | " %s\n", USAGE_COLORS_DEFAULT); | |
fbbc4c88 SK |
295 | fputs(_(" -l, --level <list> restrict output to defined levels\n"), out); |
296 | fputs(_(" -n, --console-level <level> set level of messages printed to console\n"), out); | |
aa192520 | 297 | fputs(_(" -P, --nopager do not pipe output into a pager\n"), out); |
5f538ac4 | 298 | fputs(_(" -p, --force-prefix force timestamp output on each line of multi-line messages\n"), out); |
fbbc4c88 | 299 | fputs(_(" -r, --raw print the raw message buffer\n"), out); |
646bba41 | 300 | fputs(_(" --noescape don't escape unprintable character\n"), out); |
fbbc4c88 SK |
301 | fputs(_(" -S, --syslog force to use syslog(2) rather than /dev/kmsg\n"), out); |
302 | fputs(_(" -s, --buffer-size <size> buffer size to query the kernel ring buffer\n"), out); | |
fbbc4c88 SK |
303 | fputs(_(" -u, --userspace display userspace messages\n"), out); |
304 | fputs(_(" -w, --follow wait for new messages\n"), out); | |
d7881b0e | 305 | fputs(_(" -W, --follow-new wait and print only new messages\n"), out); |
fbbc4c88 | 306 | fputs(_(" -x, --decode decode facility and level to readable string\n"), out); |
06dd56f9 SK |
307 | fputs(_(" -d, --show-delta show time delta between printed messages\n"), out); |
308 | fputs(_(" -e, --reltime show local time and time delta in readable format\n"), out); | |
0825fe16 BS |
309 | fputs(_(" -T, --ctime show human-readable timestamp (may be inaccurate!)\n"), out); |
310 | fputs(_(" -t, --notime don't show any timestamp with messages\n"), out); | |
311 | fputs(_(" --time-format <format> show timestamp using the given format:\n" | |
06dd56f9 SK |
312 | " [delta|reltime|ctime|notime|iso]\n" |
313 | "Suspending/resume will make ctime and iso timestamps inaccurate.\n"), out); | |
732d7594 KZ |
314 | fputs(_(" --since <time> display the lines since the specified time\n"), out); |
315 | fputs(_(" --until <time> display the lines until the specified time\n"), out); | |
316 | ||
fbbc4c88 | 317 | fputs(USAGE_SEPARATOR, out); |
f45f3ec3 | 318 | printf(USAGE_HELP_OPTIONS(29)); |
dcd16b0f | 319 | fputs(_("\nSupported log facilities:\n"), out); |
fbbc4c88 | 320 | for (i = 0; i < ARRAY_SIZE(level_names); i++) |
963ac507 | 321 | fprintf(out, " %7s - %s\n", |
fbbc4c88 SK |
322 | facility_names[i].name, |
323 | _(facility_names[i].help)); | |
85f3cc55 | 324 | |
dcd16b0f | 325 | fputs(_("\nSupported log levels (priorities):\n"), out); |
fbbc4c88 | 326 | for (i = 0; i < ARRAY_SIZE(level_names); i++) |
963ac507 | 327 | fprintf(out, " %7s - %s\n", |
fbbc4c88 SK |
328 | level_names[i].name, |
329 | _(level_names[i].help)); | |
b3054454 | 330 | |
f45f3ec3 | 331 | printf(USAGE_MAN_TAIL("dmesg(1)")); |
6e1eda6f | 332 | exit(EXIT_SUCCESS); |
6dbe3af9 KZ |
333 | } |
334 | ||
5ef05369 KZ |
335 | /* |
336 | * LEVEL ::= <number> | <name> | |
8c8fa302 BM |
337 | * <number> ::= @len is set: number in range <0..N>, where N < ARRAY_SIZE(level_names) |
338 | * ::= @len not set: number in range <1..N>, where N <= ARRAY_SIZE(level_names) | |
5ef05369 | 339 | * <name> ::= case-insensitive text |
8c8fa302 BM |
340 | * |
341 | * Note that @len argument is not set when parsing "-n <level>" command line | |
9e930041 | 342 | * option. The console_level is interpreted as "log level less than the value". |
8c8fa302 BM |
343 | * |
344 | * For example "dmesg -n 8" or "dmesg -n debug" enables debug console log | |
345 | * level by klogctl(SYSLOG_ACTION_CONSOLE_LEVEL, NULL, 8). The @str argument | |
346 | * has to be parsed to number in range <1..8>. | |
5ef05369 | 347 | */ |
5c8f6bc6 | 348 | static int parse_level(const char *str, size_t len) |
f06ec64f | 349 | { |
8c8fa302 BM |
350 | int offset = 0; |
351 | ||
5c8f6bc6 | 352 | if (!str) |
f06ec64f | 353 | return -1; |
8c8fa302 | 354 | if (!len) { |
5c8f6bc6 | 355 | len = strlen(str); |
8c8fa302 BM |
356 | offset = 1; |
357 | } | |
5c8f6bc6 | 358 | errno = 0; |
f06ec64f | 359 | |
5c8f6bc6 KZ |
360 | if (isdigit(*str)) { |
361 | char *end = NULL; | |
8c8fa302 | 362 | long x = strtol(str, &end, 10) - offset; |
5c8f6bc6 | 363 | |
738767b9 KZ |
364 | if (!errno && end && end > str && (size_t) (end - str) == len && |
365 | x >= 0 && (size_t) x < ARRAY_SIZE(level_names)) | |
8c8fa302 | 366 | return x + offset; |
5c8f6bc6 | 367 | } else { |
738767b9 KZ |
368 | size_t i; |
369 | ||
5c8f6bc6 KZ |
370 | for (i = 0; i < ARRAY_SIZE(level_names); i++) { |
371 | const char *n = level_names[i].name; | |
372 | ||
373 | if (strncasecmp(str, n, len) == 0 && *(n + len) == '\0') | |
8c8fa302 | 374 | return i + offset; |
5c8f6bc6 KZ |
375 | } |
376 | } | |
377 | ||
378 | if (errno) | |
379 | err(EXIT_FAILURE, _("failed to parse level '%s'"), str); | |
380 | ||
381 | errx(EXIT_FAILURE, _("unknown level '%s'"), str); | |
f06ec64f KZ |
382 | return -1; |
383 | } | |
384 | ||
5ef05369 KZ |
385 | /* |
386 | * FACILITY ::= <number> | <name> | |
387 | * <number> ::= number in range <0..N>, where N < ARRAY_SIZE(facility_names) | |
388 | * <name> ::= case-insensitive text | |
389 | */ | |
0e24df3b KZ |
390 | static int parse_facility(const char *str, size_t len) |
391 | { | |
0e24df3b KZ |
392 | if (!str) |
393 | return -1; | |
394 | if (!len) | |
395 | len = strlen(str); | |
396 | errno = 0; | |
397 | ||
398 | if (isdigit(*str)) { | |
399 | char *end = NULL; | |
738767b9 | 400 | long x = strtol(str, &end, 10); |
0e24df3b | 401 | |
738767b9 KZ |
402 | if (!errno && end && end > str && (size_t) (end - str) == len && |
403 | x >= 0 && (size_t) x < ARRAY_SIZE(facility_names)) | |
404 | return x; | |
0e24df3b | 405 | } else { |
738767b9 KZ |
406 | size_t i; |
407 | ||
0e24df3b KZ |
408 | for (i = 0; i < ARRAY_SIZE(facility_names); i++) { |
409 | const char *n = facility_names[i].name; | |
410 | ||
411 | if (strncasecmp(str, n, len) == 0 && *(n + len) == '\0') | |
412 | return i; | |
413 | } | |
414 | } | |
415 | ||
416 | if (errno) | |
417 | err(EXIT_FAILURE, _("failed to parse facility '%s'"), str); | |
418 | ||
419 | errx(EXIT_FAILURE, _("unknown facility '%s'"), str); | |
420 | return -1; | |
421 | } | |
422 | ||
5ef05369 KZ |
423 | /* |
424 | * Parses numerical prefix used for all messages in kernel ring buffer. | |
425 | * | |
426 | * Priorities/facilities are encoded into a single 32-bit quantity, where the | |
427 | * bottom 3 bits are the priority (0-7) and the top 28 bits are the facility | |
428 | * (0-big number). | |
429 | * | |
ddca870a | 430 | * Note that the number has to end with '>' or ',' char. |
5ef05369 | 431 | */ |
636a6207 KZ |
432 | static const char *parse_faclev(const char *str, int *fac, int *lev) |
433 | { | |
434 | long num; | |
435 | char *end = NULL; | |
436 | ||
437 | if (!str) | |
438 | return str; | |
439 | ||
440 | errno = 0; | |
441 | num = strtol(str, &end, 10); | |
442 | ||
443 | if (!errno && end && end > str) { | |
444 | *fac = LOG_FAC(num); | |
445 | *lev = LOG_PRI(num); | |
85f3cc55 | 446 | |
738767b9 | 447 | if (*lev < 0 || (size_t) *lev > ARRAY_SIZE(level_names)) |
85f3cc55 | 448 | *lev = -1; |
738767b9 | 449 | if (*fac < 0 || (size_t) *fac > ARRAY_SIZE(facility_names)) |
85f3cc55 | 450 | *fac = -1; |
ddca870a | 451 | return end + 1; /* skip '<' or ',' */ |
636a6207 KZ |
452 | } |
453 | ||
454 | return str; | |
455 | } | |
456 | ||
ddca870a KZ |
457 | /* |
458 | * Parses timestamp from syslog message prefix, expected format: | |
459 | * | |
460 | * seconds.microseconds] | |
461 | * | |
462 | * the ']' is the timestamp field terminator. | |
463 | */ | |
464 | static const char *parse_syslog_timestamp(const char *str0, struct timeval *tv) | |
bd304d92 KZ |
465 | { |
466 | const char *str = str0; | |
467 | char *end = NULL; | |
468 | ||
469 | if (!str0) | |
470 | return str0; | |
471 | ||
472 | errno = 0; | |
473 | tv->tv_sec = strtol(str, &end, 10); | |
474 | ||
475 | if (!errno && end && *end == '.' && *(end + 1)) { | |
476 | str = end + 1; | |
477 | end = NULL; | |
478 | tv->tv_usec = strtol(str, &end, 10); | |
479 | } | |
480 | if (errno || !end || end == str || *end != ']') | |
481 | return str0; | |
482 | ||
483 | return end + 1; /* skip ']' */ | |
484 | } | |
485 | ||
ddca870a KZ |
486 | /* |
487 | * Parses timestamp from /dev/kmsg, expected formats: | |
488 | * | |
489 | * microseconds, | |
490 | * microseconds; | |
491 | * | |
492 | * the ',' is fields separators and ';' items terminator (for the last item) | |
493 | */ | |
494 | static const char *parse_kmsg_timestamp(const char *str0, struct timeval *tv) | |
495 | { | |
496 | const char *str = str0; | |
497 | char *end = NULL; | |
498 | uint64_t usec; | |
499 | ||
500 | if (!str0) | |
501 | return str0; | |
502 | ||
503 | errno = 0; | |
504 | usec = strtoumax(str, &end, 10); | |
505 | ||
506 | if (!errno && end && (*end == ';' || *end == ',')) { | |
507 | tv->tv_usec = usec % 1000000; | |
508 | tv->tv_sec = usec / 1000000; | |
509 | } else | |
510 | return str0; | |
511 | ||
512 | return end + 1; /* skip separator */ | |
513 | } | |
514 | ||
bd304d92 KZ |
515 | |
516 | static double time_diff(struct timeval *a, struct timeval *b) | |
517 | { | |
518 | return (a->tv_sec - b->tv_sec) + (a->tv_usec - b->tv_usec) / 1E6; | |
519 | } | |
520 | ||
7ff1f63f | 521 | static int get_syslog_buffer_size(void) |
eed99b2a KZ |
522 | { |
523 | int n = klogctl(SYSLOG_ACTION_SIZE_BUFFER, NULL, 0); | |
524 | ||
525 | return n > 0 ? n : 0; | |
526 | } | |
527 | ||
c672220f | 528 | /* |
7ff1f63f | 529 | * Reads messages from regular file by mmap |
c672220f | 530 | */ |
7ff1f63f | 531 | static ssize_t mmap_file_buffer(struct dmesg_control *ctl, char **buf) |
c672220f KZ |
532 | { |
533 | struct stat st; | |
9b3a6984 | 534 | int fd; |
c672220f | 535 | |
9b3a6984 KZ |
536 | if (!ctl->filename) |
537 | return -1; | |
538 | ||
539 | fd = open(ctl->filename, O_RDONLY); | |
c672220f | 540 | if (fd < 0) |
9b3a6984 | 541 | err(EXIT_FAILURE, _("cannot open %s"), ctl->filename); |
c672220f | 542 | if (fstat(fd, &st)) |
fc14ceba | 543 | err(EXIT_FAILURE, _("stat of %s failed"), ctl->filename); |
c672220f KZ |
544 | |
545 | *buf = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0); | |
546 | if (*buf == MAP_FAILED) | |
9b3a6984 | 547 | err(EXIT_FAILURE, _("cannot mmap: %s"), ctl->filename); |
c672220f KZ |
548 | ctl->mmap_buff = *buf; |
549 | ctl->pagesize = getpagesize(); | |
550 | close(fd); | |
551 | ||
552 | return st.st_size; | |
553 | } | |
554 | ||
5ef05369 | 555 | /* |
7ff1f63f | 556 | * Reads messages from kernel ring buffer by klogctl() |
5ef05369 | 557 | */ |
7ff1f63f | 558 | static ssize_t read_syslog_buffer(struct dmesg_control *ctl, char **buf) |
65e3eed9 KZ |
559 | { |
560 | size_t sz; | |
561 | int rc = -1; | |
65e3eed9 | 562 | |
e6471b9f KZ |
563 | if (ctl->bufsize) { |
564 | sz = ctl->bufsize + 8; | |
65e3eed9 | 565 | *buf = xmalloc(sz * sizeof(char)); |
50cc6332 | 566 | rc = klogctl(SYSLOG_ACTION_READ_ALL, *buf, sz); |
65e3eed9 KZ |
567 | } else { |
568 | sz = 16392; | |
569 | while (1) { | |
570 | *buf = xmalloc(sz * sizeof(char)); | |
571 | rc = klogctl(SYSLOG_ACTION_READ_ALL, *buf, sz); | |
738767b9 KZ |
572 | if (rc < 0) |
573 | break; | |
574 | if ((size_t) rc != sz || sz > (1 << 28)) | |
65e3eed9 KZ |
575 | break; |
576 | free(*buf); | |
577 | *buf = NULL; | |
578 | sz *= 4; | |
579 | } | |
65e3eed9 KZ |
580 | } |
581 | ||
582 | return rc; | |
583 | } | |
584 | ||
7ff1f63f KZ |
585 | /* |
586 | * Top level function to read messages | |
587 | */ | |
e6471b9f KZ |
588 | static ssize_t read_buffer(struct dmesg_control *ctl, char **buf) |
589 | { | |
590 | ssize_t n = -1; | |
591 | ||
592 | switch (ctl->method) { | |
593 | case DMESG_METHOD_MMAP: | |
7ff1f63f | 594 | n = mmap_file_buffer(ctl, buf); |
e6471b9f KZ |
595 | break; |
596 | case DMESG_METHOD_SYSLOG: | |
597 | if (!ctl->bufsize) | |
7ff1f63f | 598 | ctl->bufsize = get_syslog_buffer_size(); |
e6471b9f | 599 | |
7ff1f63f | 600 | n = read_syslog_buffer(ctl, buf); |
e6471b9f | 601 | break; |
ddca870a KZ |
602 | case DMESG_METHOD_KMSG: |
603 | /* | |
604 | * Since kernel 3.5.0 | |
605 | */ | |
606 | n = read_kmsg(ctl); | |
607 | break; | |
f6f1356f SK |
608 | default: |
609 | abort(); /* impossible method -> drop core */ | |
e6471b9f KZ |
610 | } |
611 | ||
612 | return n; | |
613 | } | |
614 | ||
b8300c0a KZ |
615 | static int fwrite_hex(const char *buf, size_t size, FILE *out) |
616 | { | |
738767b9 | 617 | size_t i; |
b8300c0a KZ |
618 | |
619 | for (i = 0; i < size; i++) { | |
2e45524d | 620 | int rc = fprintf(out, "\\x%02hhx", buf[i]); |
b8300c0a KZ |
621 | if (rc < 0) |
622 | return rc; | |
623 | } | |
624 | return 0; | |
625 | } | |
626 | ||
5ef05369 KZ |
627 | /* |
628 | * Prints to 'out' and non-printable chars are replaced with \x<hex> sequences. | |
629 | */ | |
646bba41 | 630 | static void safe_fwrite(struct dmesg_control *ctl, const char *buf, size_t size, int indent, FILE *out) |
b8300c0a | 631 | { |
738767b9 | 632 | size_t i; |
b8300c0a KZ |
633 | #ifdef HAVE_WIDECHAR |
634 | mbstate_t s; | |
fd7b0b4e | 635 | wchar_t wc; |
b8300c0a KZ |
636 | memset(&s, 0, sizeof (s)); |
637 | #endif | |
638 | for (i = 0; i < size; i++) { | |
639 | const char *p = buf + i; | |
640 | int rc, hex = 0; | |
646bba41 | 641 | size_t len = 1; |
b8300c0a | 642 | |
646bba41 | 643 | if (!ctl->noesc) { |
fd7b0b4e KZ |
644 | if (*p == '\0') { |
645 | hex = 1; | |
646 | goto doprint; | |
647 | } | |
b8300c0a | 648 | #ifdef HAVE_WIDECHAR |
646bba41 KZ |
649 | len = mbrtowc(&wc, p, size - i, &s); |
650 | ||
651 | if (len == 0) /* L'\0' */ | |
652 | return; | |
653 | ||
654 | if (len == (size_t)-1 || len == (size_t)-2) { /* invalid sequence */ | |
655 | memset(&s, 0, sizeof (s)); | |
656 | len = hex = 1; | |
657 | i += len - 1; | |
658 | } else if (len > 1) { | |
659 | if (!iswprint(wc) && !iswspace(wc)) /* non-printable multibyte */ | |
660 | hex = 1; | |
661 | i += len - 1; | |
662 | } else | |
0720766e | 663 | #endif |
646bba41 KZ |
664 | { |
665 | len = 1; | |
666 | if (!isprint((unsigned char) *p) && | |
667 | !isspace((unsigned char) *p)) /* non-printable */ | |
668 | hex = 1; | |
669 | } | |
3661aab4 KZ |
670 | } |
671 | ||
fd7b0b4e | 672 | doprint: |
b8300c0a KZ |
673 | if (hex) |
674 | rc = fwrite_hex(p, len, out); | |
b45c3da2 | 675 | else if (*p == '\n' && *(p + 1) && indent) { |
f1300e2c SK |
676 | rc = fwrite(p, 1, len, out) != len; |
677 | if (fprintf(out, "%*s", indent, "") != indent) | |
678 | rc |= 1; | |
3661aab4 | 679 | } else |
85f3cc55 | 680 | rc = fwrite(p, 1, len, out) != len; |
3661aab4 | 681 | |
97c32789 KZ |
682 | if (rc != 0) { |
683 | if (errno != EPIPE) | |
684 | err(EXIT_FAILURE, _("write failed")); | |
685 | exit(EXIT_SUCCESS); | |
686 | } | |
b8300c0a KZ |
687 | } |
688 | } | |
689 | ||
ddca870a KZ |
690 | static const char *skip_item(const char *begin, const char *end, const char *sep) |
691 | { | |
692 | while (begin < end) { | |
693 | int c = *begin++; | |
694 | ||
695 | if (c == '\0' || strchr(sep, c)) | |
696 | break; | |
697 | } | |
698 | ||
699 | return begin; | |
700 | } | |
701 | ||
60464b1f KZ |
702 | /* |
703 | * Parses one record from syslog(2) buffer | |
704 | */ | |
7af23060 KZ |
705 | static int get_next_syslog_record(struct dmesg_control *ctl, |
706 | struct dmesg_record *rec) | |
f4fa5b44 | 707 | { |
738767b9 | 708 | size_t i; |
b8300c0a KZ |
709 | const char *begin = NULL; |
710 | ||
7af23060 KZ |
711 | if (ctl->method != DMESG_METHOD_MMAP && |
712 | ctl->method != DMESG_METHOD_SYSLOG) | |
713 | return -1; | |
714 | ||
a7ee94f2 KZ |
715 | if (!rec->next || !rec->next_size) |
716 | return 1; | |
f4fa5b44 | 717 | |
ddca870a | 718 | INIT_DMESG_RECORD(rec); |
a7ee94f2 | 719 | |
c672220f KZ |
720 | /* |
721 | * Unmap already printed file data from memory | |
722 | */ | |
723 | if (ctl->mmap_buff && (size_t) (rec->next - ctl->mmap_buff) > ctl->pagesize) { | |
724 | void *x = ctl->mmap_buff; | |
725 | ||
726 | ctl->mmap_buff += ctl->pagesize; | |
727 | munmap(x, ctl->pagesize); | |
728 | } | |
729 | ||
a7ee94f2 KZ |
730 | for (i = 0; i < rec->next_size; i++) { |
731 | const char *p = rec->next + i; | |
732 | const char *end = NULL; | |
b8300c0a KZ |
733 | |
734 | if (!begin) | |
735 | begin = p; | |
a7ee94f2 | 736 | if (i + 1 == rec->next_size) { |
b8300c0a | 737 | end = p + 1; |
f4fa5b44 | 738 | i++; |
22f69825 KZ |
739 | } else if (*p == '\n' && *(p + 1) == '<') |
740 | end = p; | |
741 | ||
a7ee94f2 KZ |
742 | if (begin && !*begin) |
743 | begin = NULL; /* zero(s) at the end of the buffer? */ | |
b8300c0a KZ |
744 | if (!begin || !end) |
745 | continue; | |
746 | if (end <= begin) | |
747 | continue; /* error or empty line? */ | |
748 | ||
636a6207 | 749 | if (*begin == '<') { |
506b5451 | 750 | if (ctl->fltr_lev || ctl->fltr_fac || ctl->decode || ctl->color || ctl->json) |
a7ee94f2 KZ |
751 | begin = parse_faclev(begin + 1, &rec->facility, |
752 | &rec->level); | |
ddca870a KZ |
753 | else |
754 | begin = skip_item(begin, end, ">"); | |
b8300c0a KZ |
755 | } |
756 | ||
bd304d92 KZ |
757 | if (*begin == '[' && (*(begin + 1) == ' ' || |
758 | isdigit(*(begin + 1)))) { | |
776eabe7 SK |
759 | |
760 | if (!is_timefmt(ctl, NONE)) | |
ddca870a | 761 | begin = parse_syslog_timestamp(begin + 1, &rec->tv); |
776eabe7 | 762 | else |
ddca870a KZ |
763 | begin = skip_item(begin, end, "]"); |
764 | ||
31c9099a KZ |
765 | if (begin < end && *begin == ' ') |
766 | begin++; | |
a7ee94f2 | 767 | } |
d74b8dfc | 768 | |
a7ee94f2 KZ |
769 | rec->mesg = begin; |
770 | rec->mesg_size = end - begin; | |
b8300c0a | 771 | |
5f538ac4 PB |
772 | /* Don't count \n from the last message to the message size */ |
773 | if (*end != '\n' && *(end - 1) == '\n') | |
774 | rec->mesg_size--; | |
775 | ||
a7ee94f2 KZ |
776 | rec->next_size -= end - rec->next; |
777 | rec->next = rec->next_size > 0 ? end + 1 : NULL; | |
59202950 PU |
778 | if (rec->next_size > 0) |
779 | rec->next_size--; | |
a7ee94f2 KZ |
780 | |
781 | return 0; | |
782 | } | |
783 | ||
784 | return 1; | |
785 | } | |
786 | ||
732d7594 KZ |
787 | static time_t record_time(struct dmesg_control *ctl, struct dmesg_record *rec) |
788 | { | |
789 | return ctl->boot_time.tv_sec + ctl->suspended_time + rec->tv.tv_sec; | |
790 | } | |
791 | ||
a7ee94f2 KZ |
792 | static int accept_record(struct dmesg_control *ctl, struct dmesg_record *rec) |
793 | { | |
794 | if (ctl->fltr_lev && (rec->facility < 0 || | |
795 | !isset(ctl->levels, rec->level))) | |
796 | return 0; | |
797 | ||
798 | if (ctl->fltr_fac && (rec->facility < 0 || | |
799 | !isset(ctl->facilities, rec->facility))) | |
800 | return 0; | |
801 | ||
732d7594 KZ |
802 | if (ctl->since && ctl->since >= record_time(ctl, rec)) |
803 | return 0; | |
804 | ||
805 | if (ctl->until && ctl->until <= record_time(ctl, rec)) | |
806 | return 0; | |
807 | ||
a7ee94f2 KZ |
808 | return 1; |
809 | } | |
810 | ||
7ff1f63f | 811 | static void raw_print(struct dmesg_control *ctl, const char *buf, size_t size) |
c672220f KZ |
812 | { |
813 | int lastc = '\n'; | |
814 | ||
815 | if (!ctl->mmap_buff) { | |
816 | /* | |
817 | * Print whole ring buffer | |
818 | */ | |
646bba41 | 819 | safe_fwrite(ctl, buf, size, 0, stdout); |
c672220f KZ |
820 | lastc = buf[size - 1]; |
821 | } else { | |
822 | /* | |
823 | * Print file in small chunks to save memory | |
824 | */ | |
825 | while (size) { | |
826 | size_t sz = size > ctl->pagesize ? ctl->pagesize : size; | |
827 | char *x = ctl->mmap_buff; | |
828 | ||
646bba41 | 829 | safe_fwrite(ctl, x, sz, 0, stdout); |
c672220f KZ |
830 | lastc = x[sz - 1]; |
831 | size -= sz; | |
832 | ctl->mmap_buff += sz; | |
833 | munmap(x, sz); | |
834 | } | |
835 | } | |
836 | ||
837 | if (lastc != '\n') | |
838 | putchar('\n'); | |
839 | } | |
840 | ||
60464b1f KZ |
841 | static struct tm *record_localtime(struct dmesg_control *ctl, |
842 | struct dmesg_record *rec, | |
843 | struct tm *tm) | |
844 | { | |
732d7594 | 845 | time_t t = record_time(ctl, rec); |
60464b1f KZ |
846 | return localtime_r(&t, tm); |
847 | } | |
848 | ||
0d1b3300 KZ |
849 | static char *record_ctime(struct dmesg_control *ctl, |
850 | struct dmesg_record *rec, | |
851 | char *buf, size_t bufsiz) | |
852 | { | |
60464b1f | 853 | struct tm tm; |
0d1b3300 | 854 | |
60464b1f | 855 | record_localtime(ctl, rec, &tm); |
0d1b3300 | 856 | |
f45c8180 KZ |
857 | /* TRANSLATORS: dmesg uses strftime() fo generate date-time string |
858 | where %a is abbreviated name of the day, %b is abbreviated month | |
859 | name and %e is day of the month as a decimal number. Please, set | |
860 | proper month/day order here */ | |
861 | if (strftime(buf, bufsiz, _("%a %b %e %H:%M:%S %Y"), &tm) == 0) | |
0d1b3300 KZ |
862 | *buf = '\0'; |
863 | return buf; | |
864 | } | |
865 | ||
60464b1f KZ |
866 | static char *short_ctime(struct tm *tm, char *buf, size_t bufsiz) |
867 | { | |
f45c8180 KZ |
868 | /* TRANSLATORS: dmesg uses strftime() fo generate date-time string |
869 | where: %b is abbreviated month and %e is day of the month as a | |
870 | decimal number. Please, set proper month/day order here. */ | |
871 | if (strftime(buf, bufsiz, _("%b%e %H:%M"), tm) == 0) | |
60464b1f KZ |
872 | *buf = '\0'; |
873 | return buf; | |
874 | } | |
875 | ||
8a8be309 | 876 | static char *iso_8601_time(struct dmesg_control *ctl, struct dmesg_record *rec, |
3c6e7c54 | 877 | char *buf, size_t bufsz) |
8a8be309 | 878 | { |
3c6e7c54 | 879 | struct timeval tv = { |
9bf622da | 880 | .tv_sec = ctl->boot_time.tv_sec + ctl->suspended_time + rec->tv.tv_sec, |
3c6e7c54 KZ |
881 | .tv_usec = rec->tv.tv_usec |
882 | }; | |
883 | ||
4111bb3a | 884 | if (strtimeval_iso(&tv, ISO_TIMESTAMP_COMMA_T, buf, bufsz) != 0) |
3c6e7c54 KZ |
885 | return NULL; |
886 | ||
8a8be309 SK |
887 | return buf; |
888 | } | |
889 | ||
60464b1f KZ |
890 | static double record_count_delta(struct dmesg_control *ctl, |
891 | struct dmesg_record *rec) | |
892 | { | |
893 | double delta = 0; | |
894 | ||
895 | if (timerisset(&ctl->lasttime)) | |
896 | delta = time_diff(&rec->tv, &ctl->lasttime); | |
897 | ||
898 | ctl->lasttime = rec->tv; | |
899 | return delta; | |
900 | } | |
901 | ||
5aaee63c KZ |
902 | static const char *get_subsys_delimiter(const char *mesg, size_t mesg_size) |
903 | { | |
904 | const char *p = mesg; | |
905 | size_t sz = mesg_size; | |
906 | ||
907 | while (sz > 0) { | |
908 | const char *d = strnchr(p, sz, ':'); | |
909 | if (!d) | |
910 | return NULL; | |
fcd90d9a | 911 | sz -= d - p + 1; |
5aaee63c | 912 | if (sz) { |
5fd8d655 CD |
913 | if (sz >= 2 && isblank(*(d + 1))) |
914 | return d + 2; | |
5aaee63c KZ |
915 | p = d + 1; |
916 | } | |
917 | } | |
918 | return NULL; | |
919 | } | |
920 | ||
506b5451 KZ |
921 | #define is_facpri_valid(_r) \ |
922 | (((_r)->level > -1) && ((_r)->level < (int) ARRAY_SIZE(level_names)) && \ | |
923 | ((_r)->facility > -1) && \ | |
924 | ((_r)->facility < (int) ARRAY_SIZE(facility_names))) | |
925 | ||
926 | ||
60464b1f KZ |
927 | static void print_record(struct dmesg_control *ctl, |
928 | struct dmesg_record *rec) | |
7af23060 | 929 | { |
5f538ac4 PB |
930 | char buf[128]; |
931 | char fpbuf[32] = "\0"; | |
932 | char tsbuf[64] = "\0"; | |
aec01d72 | 933 | size_t mesg_size = rec->mesg_size; |
5f538ac4 PB |
934 | int timebreak = 0; |
935 | char *mesg_copy = NULL; | |
936 | const char *line = NULL; | |
7af23060 KZ |
937 | |
938 | if (!accept_record(ctl, rec)) | |
939 | return; | |
940 | ||
941 | if (!rec->mesg_size) { | |
506b5451 KZ |
942 | if (!ctl->json) |
943 | putchar('\n'); | |
7af23060 KZ |
944 | return; |
945 | } | |
946 | ||
506b5451 KZ |
947 | if (ctl->json) { |
948 | if (!ul_jsonwrt_is_ready(&ctl->jfmt)) { | |
949 | ul_jsonwrt_init(&ctl->jfmt, stdout, 0); | |
950 | ul_jsonwrt_root_open(&ctl->jfmt); | |
951 | ul_jsonwrt_array_open(&ctl->jfmt, "dmesg"); | |
952 | } | |
953 | ul_jsonwrt_object_open(&ctl->jfmt, NULL); | |
954 | } | |
955 | ||
0d1b3300 | 956 | /* |
5f538ac4 | 957 | * Compose syslog(2) compatible raw output -- used for /dev/kmsg for |
0d1b3300 KZ |
958 | * backward compatibility with syslog(2) buffers only |
959 | */ | |
37b04d6c | 960 | if (ctl->raw) { |
5f538ac4 PB |
961 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), |
962 | "<%d>[%5ld.%06ld] ", | |
963 | LOG_MAKEPRI(rec->facility, rec->level), | |
964 | (long) rec->tv.tv_sec, | |
965 | (long) rec->tv.tv_usec); | |
6963338c | 966 | goto full_output; |
37b04d6c KZ |
967 | } |
968 | ||
5f538ac4 | 969 | /* Store decode information (facility & priority level) in a buffer */ |
506b5451 | 970 | if (!ctl->json && ctl->decode && is_facpri_valid(rec)) |
5f538ac4 PB |
971 | snprintf(fpbuf, sizeof(fpbuf), "%-6s:%-6s: ", |
972 | facility_names[rec->facility].name, | |
973 | level_names[rec->level].name); | |
974 | ||
975 | /* Store the timestamp in a buffer */ | |
776eabe7 | 976 | switch (ctl->time_fmt) { |
60464b1f KZ |
977 | double delta; |
978 | struct tm cur; | |
776eabe7 | 979 | case DMESG_TIMEFTM_NONE: |
b45c3da2 | 980 | ctl->indent = 0; |
776eabe7 SK |
981 | break; |
982 | case DMESG_TIMEFTM_CTIME: | |
5f538ac4 PB |
983 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), "[%s] ", |
984 | record_ctime(ctl, rec, buf, sizeof(buf))); | |
776eabe7 SK |
985 | break; |
986 | case DMESG_TIMEFTM_CTIME_DELTA: | |
5f538ac4 PB |
987 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), "[%s <%12.06f>] ", |
988 | record_ctime(ctl, rec, buf, sizeof(buf)), | |
989 | record_count_delta(ctl, rec)); | |
776eabe7 SK |
990 | break; |
991 | case DMESG_TIMEFTM_DELTA: | |
5f538ac4 PB |
992 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), "[<%12.06f>] ", |
993 | record_count_delta(ctl, rec)); | |
776eabe7 SK |
994 | break; |
995 | case DMESG_TIMEFTM_RELTIME: | |
60464b1f KZ |
996 | record_localtime(ctl, rec, &cur); |
997 | delta = record_count_delta(ctl, rec); | |
776eabe7 | 998 | if (cur.tm_min != ctl->lasttm.tm_min || |
60464b1f | 999 | cur.tm_hour != ctl->lasttm.tm_hour || |
5aaee63c | 1000 | cur.tm_yday != ctl->lasttm.tm_yday) { |
5f538ac4 PB |
1001 | timebreak = 1; |
1002 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), "[%s] ", | |
1003 | short_ctime(&cur, buf, | |
1004 | sizeof(buf))); | |
5aaee63c | 1005 | } else { |
5aaee63c | 1006 | if (delta < 10) |
5f538ac4 PB |
1007 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), |
1008 | "[ %+8.06f] ", delta); | |
5aaee63c | 1009 | else |
5f538ac4 PB |
1010 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), |
1011 | "[ %+9.06f] ", delta); | |
5aaee63c | 1012 | } |
60464b1f | 1013 | ctl->lasttm = cur; |
776eabe7 SK |
1014 | break; |
1015 | case DMESG_TIMEFTM_TIME: | |
506b5451 KZ |
1016 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), |
1017 | ctl->json ? "%5ld.%06ld" : "[%5ld.%06ld] ", | |
5f538ac4 PB |
1018 | (long)rec->tv.tv_sec, |
1019 | (long)rec->tv.tv_usec); | |
776eabe7 SK |
1020 | break; |
1021 | case DMESG_TIMEFTM_TIME_DELTA: | |
5f538ac4 PB |
1022 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), "[%5ld.%06ld <%12.06f>] ", |
1023 | (long)rec->tv.tv_sec, | |
1024 | (long)rec->tv.tv_usec, | |
1025 | record_count_delta(ctl, rec)); | |
776eabe7 | 1026 | break; |
8a8be309 | 1027 | case DMESG_TIMEFTM_ISO8601: |
5f538ac4 PB |
1028 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), "%s ", |
1029 | iso_8601_time(ctl, rec, buf, | |
1030 | sizeof(buf))); | |
8a8be309 | 1031 | break; |
776eabe7 SK |
1032 | default: |
1033 | abort(); | |
60464b1f | 1034 | } |
7af23060 | 1035 | |
5f538ac4 PB |
1036 | ctl->indent += strlen(fpbuf); |
1037 | ||
1038 | full_output: | |
1039 | /* Output the decode information */ | |
506b5451 | 1040 | if (*fpbuf) { |
5f538ac4 | 1041 | fputs(fpbuf, stdout); |
506b5451 KZ |
1042 | } else if (ctl->json && is_facpri_valid(rec)) { |
1043 | if (ctl->decode) { | |
1044 | ul_jsonwrt_value_s(&ctl->jfmt, "fac", facility_names[rec->facility].name); | |
1045 | ul_jsonwrt_value_s(&ctl->jfmt, "pri", level_names[rec->level].name); | |
1046 | } else | |
1047 | ul_jsonwrt_value_u64(&ctl->jfmt, "pri", LOG_MAKEPRI(rec->facility, rec->level)); | |
1048 | } | |
5f538ac4 PB |
1049 | |
1050 | /* Output the timestamp buffer */ | |
1051 | if (*tsbuf) { | |
1052 | /* Colorize the timestamp */ | |
1053 | if (ctl->color) | |
1054 | dmesg_enable_color(timebreak ? DMESG_COLOR_TIMEBREAK : | |
1055 | DMESG_COLOR_TIME); | |
1056 | if (ctl->time_fmt != DMESG_TIMEFTM_RELTIME) { | |
506b5451 KZ |
1057 | if (ctl->json) |
1058 | ul_jsonwrt_value_raw(&ctl->jfmt, "time", tsbuf); | |
1059 | else | |
1060 | fputs(tsbuf, stdout); | |
5f538ac4 PB |
1061 | } else { |
1062 | /* | |
1063 | * For relative timestamping, the first line's | |
1064 | * timestamp is the offset and all other lines will | |
1065 | * report an offset of 0.000000. | |
1066 | */ | |
506b5451 | 1067 | fputs(!line ? tsbuf : "[ +0.000000] ", stdout); |
5f538ac4 PB |
1068 | } |
1069 | if (ctl->color) | |
1070 | color_disable(); | |
1071 | } | |
ddca870a | 1072 | |
5f538ac4 PB |
1073 | /* |
1074 | * A kernel message may contain several lines of output, separated | |
1075 | * by '\n'. If the timestamp and decode outputs are forced then each | |
1076 | * line of the message must be displayed with that information. | |
1077 | */ | |
1078 | if (ctl->force_prefix) { | |
1079 | if (!line) { | |
dd83526a | 1080 | mesg_copy = xstrdup(rec->mesg); |
5f538ac4 | 1081 | line = strtok(mesg_copy, "\n"); |
2d278988 KZ |
1082 | if (!line) |
1083 | goto done; /* only when something is wrong */ | |
5f538ac4 PB |
1084 | mesg_size = strlen(line); |
1085 | } | |
1086 | } else { | |
1087 | line = rec->mesg; | |
1088 | mesg_size = rec->mesg_size; | |
1089 | } | |
5aaee63c | 1090 | |
5f538ac4 | 1091 | /* Colorize kernel message output */ |
5aaee63c | 1092 | if (ctl->color) { |
5f538ac4 PB |
1093 | /* Subsystem prefix */ |
1094 | const char *subsys = get_subsys_delimiter(line, mesg_size); | |
1095 | int has_color = 0; | |
1096 | ||
5aaee63c | 1097 | if (subsys) { |
f4bc7f96 | 1098 | dmesg_enable_color(DMESG_COLOR_SUBSYS); |
646bba41 | 1099 | safe_fwrite(ctl, line, subsys - line, ctl->indent, stdout); |
5aaee63c KZ |
1100 | color_disable(); |
1101 | ||
5f538ac4 PB |
1102 | mesg_size -= subsys - line; |
1103 | line = subsys; | |
5aaee63c | 1104 | } |
5f538ac4 PB |
1105 | /* Error, alert .. etc. colors */ |
1106 | has_color = set_level_color(rec->level, line, mesg_size) == 0; | |
646bba41 | 1107 | safe_fwrite(ctl, line, mesg_size, ctl->indent, stdout); |
5aaee63c KZ |
1108 | if (has_color) |
1109 | color_disable(); | |
506b5451 KZ |
1110 | } else { |
1111 | if (ctl->json) | |
1112 | ul_jsonwrt_value_s(&ctl->jfmt, "msg", line); | |
1113 | else | |
1114 | safe_fwrite(ctl, line, mesg_size, ctl->indent, stdout); | |
1115 | } | |
5f538ac4 PB |
1116 | |
1117 | /* Get the next line */ | |
1118 | if (ctl->force_prefix) { | |
1119 | line = strtok(NULL, "\n"); | |
1120 | if (line && *line) { | |
1121 | putchar('\n'); | |
1122 | mesg_size = strlen(line); | |
1123 | goto full_output; | |
1124 | } | |
5f538ac4 | 1125 | } |
098ce273 | 1126 | |
2d278988 | 1127 | done: |
fb9ed3b4 | 1128 | free(mesg_copy); |
506b5451 KZ |
1129 | if (ctl->json) |
1130 | ul_jsonwrt_object_close(&ctl->jfmt); | |
1131 | else | |
1132 | putchar('\n'); | |
7af23060 KZ |
1133 | } |
1134 | ||
a7ee94f2 KZ |
1135 | /* |
1136 | * Prints the 'buf' kernel ring buffer; the messages are filtered out according | |
1137 | * to 'levels' and 'facilities' bitarrays. | |
1138 | */ | |
7ff1f63f KZ |
1139 | static void print_buffer(struct dmesg_control *ctl, |
1140 | const char *buf, size_t size) | |
a7ee94f2 KZ |
1141 | { |
1142 | struct dmesg_record rec = { .next = buf, .next_size = size }; | |
1143 | ||
1144 | if (ctl->raw) { | |
7ff1f63f | 1145 | raw_print(ctl, buf, size); |
a7ee94f2 KZ |
1146 | return; |
1147 | } | |
1148 | ||
7af23060 KZ |
1149 | while (get_next_syslog_record(ctl, &rec) == 0) |
1150 | print_record(ctl, &rec); | |
1151 | } | |
a7ee94f2 | 1152 | |
4ceb601d MB |
1153 | static ssize_t read_kmsg_one(struct dmesg_control *ctl) |
1154 | { | |
1155 | ssize_t size; | |
1156 | ||
8a6f0cfd | 1157 | /* kmsg returns EPIPE if record was modified while reading */ |
4ceb601d | 1158 | do { |
8a6f0cfd KZ |
1159 | size = read(ctl->kmsg, ctl->kmsg_buf, |
1160 | sizeof(ctl->kmsg_buf) - 1); | |
1161 | } while (size < 0 && errno == EPIPE); | |
4ceb601d MB |
1162 | |
1163 | return size; | |
1164 | } | |
1165 | ||
7af23060 KZ |
1166 | static int init_kmsg(struct dmesg_control *ctl) |
1167 | { | |
0fd12a96 KZ |
1168 | int mode = O_RDONLY; |
1169 | ||
1170 | if (!ctl->follow) | |
1171 | mode |= O_NONBLOCK; | |
3938c08c KZ |
1172 | else |
1173 | setlinebuf(stdout); | |
0fd12a96 KZ |
1174 | |
1175 | ctl->kmsg = open("/dev/kmsg", mode); | |
c677ffba KZ |
1176 | if (ctl->kmsg < 0) |
1177 | return -1; | |
1178 | ||
1179 | /* | |
1180 | * Seek after the last record available at the time | |
1181 | * the last SYSLOG_ACTION_CLEAR was issued. | |
1182 | * | |
1183 | * ... otherwise SYSLOG_ACTION_CLEAR will have no effect for kmsg. | |
1184 | */ | |
d7881b0e | 1185 | lseek(ctl->kmsg, 0, ctl->end ? SEEK_END : SEEK_DATA); |
298a073c KZ |
1186 | |
1187 | /* | |
29e204d1 KZ |
1188 | * Old kernels (<3.5) can successfully open /dev/kmsg for read-only, |
1189 | * but read() returns -EINVAL :-((( | |
298a073c KZ |
1190 | * |
1191 | * Let's try to read the first record. The record is later processed in | |
1192 | * read_kmsg(). | |
1193 | */ | |
4ceb601d | 1194 | ctl->kmsg_first_read = read_kmsg_one(ctl); |
298a073c KZ |
1195 | if (ctl->kmsg_first_read < 0) { |
1196 | close(ctl->kmsg); | |
1197 | ctl->kmsg = -1; | |
1198 | return -1; | |
1199 | } | |
1200 | ||
c677ffba | 1201 | return 0; |
f4fa5b44 KZ |
1202 | } |
1203 | ||
ddca870a KZ |
1204 | /* |
1205 | * /dev/kmsg record format: | |
1206 | * | |
9e930041 | 1207 | * faclev,seqnum,timestamp[optional, ...];message\n |
ddca870a KZ |
1208 | * TAGNAME=value |
1209 | * ... | |
1210 | * | |
1211 | * - fields are separated by ',' | |
1212 | * - last field is terminated by ';' | |
1213 | * | |
1214 | */ | |
1215 | #define LAST_KMSG_FIELD(s) (!s || !*s || *(s - 1) == ';') | |
1216 | ||
1217 | static int parse_kmsg_record(struct dmesg_control *ctl, | |
1218 | struct dmesg_record *rec, | |
1219 | char *buf, | |
1220 | size_t sz) | |
1221 | { | |
1222 | const char *p = buf, *end; | |
1223 | ||
1224 | if (sz == 0 || !buf || !*buf) | |
1225 | return -1; | |
1226 | ||
1227 | end = buf + (sz - 1); | |
1228 | INIT_DMESG_RECORD(rec); | |
1229 | ||
1230 | while (p < end && isspace(*p)) | |
1231 | p++; | |
1232 | ||
1233 | /* A) priority and facility */ | |
098ce273 | 1234 | if (ctl->fltr_lev || ctl->fltr_fac || ctl->decode || |
506b5451 | 1235 | ctl->raw || ctl->color || ctl->json) |
ddca870a KZ |
1236 | p = parse_faclev(p, &rec->facility, &rec->level); |
1237 | else | |
1238 | p = skip_item(p, end, ","); | |
1239 | if (LAST_KMSG_FIELD(p)) | |
1240 | goto mesg; | |
1241 | ||
1242 | /* B) sequence number */ | |
1243 | p = skip_item(p, end, ",;"); | |
1244 | if (LAST_KMSG_FIELD(p)) | |
1245 | goto mesg; | |
1246 | ||
1247 | /* C) timestamp */ | |
776eabe7 | 1248 | if (is_timefmt(ctl, NONE)) |
ddca870a KZ |
1249 | p = skip_item(p, end, ",;"); |
1250 | else | |
1251 | p = parse_kmsg_timestamp(p, &rec->tv); | |
1252 | if (LAST_KMSG_FIELD(p)) | |
1253 | goto mesg; | |
1254 | ||
8a6f0cfd | 1255 | /* D) optional fields (ignore) */ |
ddca870a | 1256 | p = skip_item(p, end, ";"); |
ddca870a KZ |
1257 | |
1258 | mesg: | |
8a6f0cfd | 1259 | /* E) message text */ |
ddca870a KZ |
1260 | rec->mesg = p; |
1261 | p = skip_item(p, end, "\n"); | |
ddca870a KZ |
1262 | if (!p) |
1263 | return -1; | |
1264 | ||
5f538ac4 PB |
1265 | /* The message text is terminated by \n, but it's possible that the |
1266 | * message contains another stuff behind this linebreak; in this case | |
1267 | * the previous skip_item() returns pointer to the stuff behind \n. | |
73afd3f8 | 1268 | * Let's normalize all these situations and make sure we always point to |
5f538ac4 PB |
1269 | * the \n. |
1270 | * | |
1271 | * Note that the next unhexmangle_to_buffer() will replace \n by \0. | |
1272 | */ | |
1273 | if (*p && *p != '\n') | |
1274 | p--; | |
ddca870a KZ |
1275 | |
1276 | /* | |
9e930041 | 1277 | * Kernel escapes non-printable characters, unfortunately kernel |
ddca870a KZ |
1278 | * definition of "non-printable" is too strict. On UTF8 console we can |
1279 | * print many chars, so let's decode from kernel. | |
1280 | */ | |
5f538ac4 PB |
1281 | rec->mesg_size = unhexmangle_to_buffer(rec->mesg, |
1282 | (char *) rec->mesg, p - rec->mesg + 1); | |
1283 | ||
1284 | rec->mesg_size--; /* don't count \0 */ | |
ddca870a | 1285 | |
8a6f0cfd | 1286 | /* F) message tags (ignore) */ |
ddca870a KZ |
1287 | |
1288 | return 0; | |
1289 | } | |
1290 | ||
1291 | /* | |
1292 | * Note that each read() call for /dev/kmsg returns always one record. It means | |
1293 | * that we don't have to read whole message buffer before the records parsing. | |
1294 | * | |
1295 | * So this function does not compose one huge buffer (like read_syslog_buffer()) | |
1296 | * and print_buffer() is unnecessary. All is done in this function. | |
1297 | * | |
1298 | * Returns 0 on success, -1 on error. | |
1299 | */ | |
1300 | static int read_kmsg(struct dmesg_control *ctl) | |
1301 | { | |
ddca870a | 1302 | struct dmesg_record rec; |
298a073c | 1303 | ssize_t sz; |
ddca870a KZ |
1304 | |
1305 | if (ctl->method != DMESG_METHOD_KMSG || ctl->kmsg < 0) | |
1306 | return -1; | |
1307 | ||
298a073c KZ |
1308 | /* |
1309 | * The very first read() call is done in kmsg_init() where we test | |
1310 | * /dev/kmsg usability. The return code from the initial read() is | |
1311 | * stored in ctl->kmsg_first_read; | |
1312 | */ | |
1313 | sz = ctl->kmsg_first_read; | |
ddca870a | 1314 | |
298a073c KZ |
1315 | while (sz > 0) { |
1316 | *(ctl->kmsg_buf + sz) = '\0'; /* for debug messages */ | |
ddca870a | 1317 | |
298a073c KZ |
1318 | if (parse_kmsg_record(ctl, &rec, |
1319 | ctl->kmsg_buf, (size_t) sz) == 0) | |
1320 | print_record(ctl, &rec); | |
37b04d6c | 1321 | |
4ceb601d | 1322 | sz = read_kmsg_one(ctl); |
298a073c | 1323 | } |
ddca870a KZ |
1324 | |
1325 | return 0; | |
1326 | } | |
1327 | ||
eb2306e6 | 1328 | static int which_time_format(const char *s) |
babf605d | 1329 | { |
eb2306e6 | 1330 | if (!strcmp(s, "notime")) |
babf605d | 1331 | return DMESG_TIMEFTM_NONE; |
eb2306e6 | 1332 | if (!strcmp(s, "ctime")) |
babf605d | 1333 | return DMESG_TIMEFTM_CTIME; |
eb2306e6 | 1334 | if (!strcmp(s, "delta")) |
babf605d | 1335 | return DMESG_TIMEFTM_DELTA; |
eb2306e6 | 1336 | if (!strcmp(s, "reltime")) |
babf605d | 1337 | return DMESG_TIMEFTM_RELTIME; |
eb2306e6 | 1338 | if (!strcmp(s, "iso")) |
8a8be309 | 1339 | return DMESG_TIMEFTM_ISO8601; |
eb2306e6 | 1340 | errx(EXIT_FAILURE, _("unknown time format: %s"), s); |
babf605d SK |
1341 | } |
1342 | ||
5a34fb8a KZ |
1343 | #ifdef TEST_DMESG |
1344 | static inline int dmesg_get_boot_time(struct timeval *tv) | |
1345 | { | |
1346 | char *str = getenv("DMESG_TEST_BOOTIME"); | |
1347 | uintmax_t sec, usec; | |
1348 | ||
1349 | if (str && sscanf(str, "%ju.%ju", &sec, &usec) == 2) { | |
1350 | tv->tv_sec = sec; | |
1351 | tv->tv_usec = usec; | |
1352 | return tv->tv_sec >= 0 && tv->tv_usec >= 0 ? 0 : -EINVAL; | |
1353 | } | |
1354 | ||
1355 | return get_boot_time(tv); | |
1356 | } | |
9bf622da KK |
1357 | |
1358 | static inline time_t dmesg_get_suspended_time(void) | |
1359 | { | |
1360 | if (getenv("DMESG_TEST_BOOTIME")) | |
1361 | return 0; | |
1362 | return get_suspended_time(); | |
1363 | } | |
5a34fb8a KZ |
1364 | #else |
1365 | # define dmesg_get_boot_time get_boot_time | |
9bf622da | 1366 | # define dmesg_get_suspended_time get_suspended_time |
5a34fb8a KZ |
1367 | #endif |
1368 | ||
15103c4b MP |
1369 | int main(int argc, char *argv[]) |
1370 | { | |
1371 | char *buf = NULL; | |
aa192520 | 1372 | int c, nopager = 0; |
48c5c662 | 1373 | int console_level = 0; |
6e9b06cc | 1374 | int klog_rc = 0; |
776eabe7 | 1375 | int delta = 0; |
6e9b06cc | 1376 | ssize_t n; |
9b3a6984 | 1377 | static struct dmesg_control ctl = { |
e6471b9f | 1378 | .filename = NULL, |
7ff1f63f | 1379 | .action = SYSLOG_ACTION_READ_ALL, |
ed61acc2 | 1380 | .method = DMESG_METHOD_KMSG, |
7af23060 | 1381 | .kmsg = -1, |
776eabe7 | 1382 | .time_fmt = DMESG_TIMEFTM_TIME, |
b45c3da2 | 1383 | .indent = 0, |
9b3a6984 | 1384 | }; |
d0c9ddc3 | 1385 | int colormode = UL_COLORMODE_UNDEF; |
babf605d SK |
1386 | enum { |
1387 | OPT_TIME_FORMAT = CHAR_MAX + 1, | |
732d7594 KZ |
1388 | OPT_NOESC, |
1389 | OPT_SINCE, | |
1390 | OPT_UNTIL | |
babf605d | 1391 | }; |
6dbe3af9 | 1392 | |
4a3b7949 | 1393 | static const struct option longopts[] = { |
4a3b7949 | 1394 | { "buffer-size", required_argument, NULL, 's' }, |
5ef05369 | 1395 | { "clear", no_argument, NULL, 'C' }, |
9bc2b51a | 1396 | { "color", optional_argument, NULL, 'L' }, |
4a3b7949 | 1397 | { "console-level", required_argument, NULL, 'n' }, |
bd304d92 KZ |
1398 | { "console-off", no_argument, NULL, 'D' }, |
1399 | { "console-on", no_argument, NULL, 'E' }, | |
5ef05369 | 1400 | { "decode", no_argument, NULL, 'x' }, |
c672220f | 1401 | { "file", required_argument, NULL, 'F' }, |
0e24df3b | 1402 | { "facility", required_argument, NULL, 'f' }, |
0fd12a96 | 1403 | { "follow", no_argument, NULL, 'w' }, |
d7881b0e | 1404 | { "follow-new", no_argument, NULL, 'W' }, |
f0a3a1ca | 1405 | { "human", no_argument, NULL, 'H' }, |
4a3b7949 | 1406 | { "help", no_argument, NULL, 'h' }, |
506b5451 | 1407 | { "json", no_argument, NULL, 'J' }, |
25000180 | 1408 | { "kernel", no_argument, NULL, 'k' }, |
5ef05369 | 1409 | { "level", required_argument, NULL, 'l' }, |
732d7594 | 1410 | { "since", required_argument, NULL, OPT_SINCE }, |
ed61acc2 | 1411 | { "syslog", no_argument, NULL, 'S' }, |
5ef05369 KZ |
1412 | { "raw", no_argument, NULL, 'r' }, |
1413 | { "read-clear", no_argument, NULL, 'c' }, | |
60464b1f | 1414 | { "reltime", no_argument, NULL, 'e' }, |
bd304d92 | 1415 | { "show-delta", no_argument, NULL, 'd' }, |
42fac79a | 1416 | { "ctime", no_argument, NULL, 'T' }, |
646bba41 | 1417 | { "noescape", no_argument, NULL, OPT_NOESC }, |
d74b8dfc | 1418 | { "notime", no_argument, NULL, 't' }, |
aa192520 | 1419 | { "nopager", no_argument, NULL, 'P' }, |
732d7594 | 1420 | { "until", required_argument, NULL, OPT_UNTIL }, |
25000180 | 1421 | { "userspace", no_argument, NULL, 'u' }, |
5ef05369 | 1422 | { "version", no_argument, NULL, 'V' }, |
babf605d | 1423 | { "time-format", required_argument, NULL, OPT_TIME_FORMAT }, |
5f538ac4 | 1424 | { "force-prefix", no_argument, NULL, 'p' }, |
4a3b7949 KZ |
1425 | { NULL, 0, NULL, 0 } |
1426 | }; | |
1427 | ||
a7349ee3 | 1428 | static const ul_excl_t excl[] = { /* rows and cols in ASCII order */ |
1a38ad5c | 1429 | { 'C','D','E','c','n','r' }, /* clear,off,on,read-clear,level,raw*/ |
f0a3a1ca | 1430 | { 'H','r' }, /* human, raw */ |
5aaee63c | 1431 | { 'L','r' }, /* color, raw */ |
43d2eeef | 1432 | { 'S','w' }, /* syslog,follow */ |
1a38ad5c KZ |
1433 | { 'T','r' }, /* ctime, raw */ |
1434 | { 'd','r' }, /* delta, raw */ | |
1435 | { 'e','r' }, /* reltime, raw */ | |
1436 | { 'r','x' }, /* raw, decode */ | |
1437 | { 'r','t' }, /* notime, raw */ | |
43d2eeef KZ |
1438 | { 0 } |
1439 | }; | |
1440 | int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT; | |
1441 | ||
df1dddf9 KZ |
1442 | setlocale(LC_ALL, ""); |
1443 | bindtextdomain(PACKAGE, LOCALEDIR); | |
1444 | textdomain(PACKAGE); | |
2c308875 | 1445 | close_stdout_atexit(); |
7eda085c | 1446 | |
506b5451 | 1447 | while ((c = getopt_long(argc, argv, "CcDdEeF:f:HhJkL::l:n:iPprSs:TtuVWwx", |
aca1633a | 1448 | longopts, NULL)) != -1) { |
43d2eeef KZ |
1449 | |
1450 | err_exclusive_options(c, longopts, excl, excl_st); | |
1451 | ||
df1dddf9 | 1452 | switch (c) { |
04199860 | 1453 | case 'C': |
e6471b9f | 1454 | ctl.action = SYSLOG_ACTION_CLEAR; |
04199860 | 1455 | break; |
df1dddf9 | 1456 | case 'c': |
e6471b9f | 1457 | ctl.action = SYSLOG_ACTION_READ_CLEAR; |
df1dddf9 | 1458 | break; |
bd304d92 | 1459 | case 'D': |
e6471b9f | 1460 | ctl.action = SYSLOG_ACTION_CONSOLE_OFF; |
2170174e | 1461 | break; |
bd304d92 | 1462 | case 'd': |
776eabe7 | 1463 | delta = 1; |
bd304d92 KZ |
1464 | break; |
1465 | case 'E': | |
e6471b9f | 1466 | ctl.action = SYSLOG_ACTION_CONSOLE_ON; |
2170174e | 1467 | break; |
60464b1f | 1468 | case 'e': |
776eabe7 | 1469 | ctl.time_fmt = DMESG_TIMEFTM_RELTIME; |
60464b1f | 1470 | break; |
c672220f | 1471 | case 'F': |
9b3a6984 | 1472 | ctl.filename = optarg; |
e6471b9f | 1473 | ctl.method = DMESG_METHOD_MMAP; |
c672220f | 1474 | break; |
0e24df3b | 1475 | case 'f': |
aca1633a | 1476 | ctl.fltr_fac = 1; |
c87638ad KZ |
1477 | if (string_to_bitarray(optarg, |
1478 | ctl.facilities, parse_facility) < 0) | |
1479 | return EXIT_FAILURE; | |
0e24df3b | 1480 | break; |
f0a3a1ca | 1481 | case 'H': |
776eabe7 | 1482 | ctl.time_fmt = DMESG_TIMEFTM_RELTIME; |
81bd88e4 | 1483 | colormode = UL_COLORMODE_AUTO; |
aa192520 | 1484 | ctl.pager = 1; |
f0a3a1ca | 1485 | break; |
506b5451 KZ |
1486 | case 'J': |
1487 | ctl.json = 1; | |
1488 | break; | |
25000180 | 1489 | case 'k': |
aca1633a KZ |
1490 | ctl.fltr_fac = 1; |
1491 | setbit(ctl.facilities, FAC_BASE(LOG_KERN)); | |
25000180 | 1492 | break; |
098ce273 | 1493 | case 'L': |
9bc2b51a | 1494 | colormode = UL_COLORMODE_AUTO; |
b7faf991 KZ |
1495 | if (optarg) |
1496 | colormode = colormode_or_err(optarg, | |
1497 | _("unsupported color mode")); | |
098ce273 | 1498 | break; |
636a6207 | 1499 | case 'l': |
aca1633a | 1500 | ctl.fltr_lev= 1; |
c87638ad KZ |
1501 | if (string_to_bitarray(optarg, |
1502 | ctl.levels, parse_level) < 0) | |
1503 | return EXIT_FAILURE; | |
636a6207 | 1504 | break; |
5ef05369 | 1505 | case 'n': |
e6471b9f | 1506 | ctl.action = SYSLOG_ACTION_CONSOLE_LEVEL; |
5ef05369 KZ |
1507 | console_level = parse_level(optarg, 0); |
1508 | break; | |
aa192520 KZ |
1509 | case 'P': |
1510 | nopager = 1; | |
1511 | break; | |
5f538ac4 PB |
1512 | case 'p': |
1513 | ctl.force_prefix = 1; | |
1514 | break; | |
11ea22d5 | 1515 | case 'r': |
aca1633a | 1516 | ctl.raw = 1; |
11ea22d5 | 1517 | break; |
ed61acc2 KZ |
1518 | case 'S': |
1519 | ctl.method = DMESG_METHOD_SYSLOG; | |
1520 | break; | |
df1dddf9 | 1521 | case 's': |
e6471b9f KZ |
1522 | ctl.bufsize = strtou32_or_err(optarg, |
1523 | _("invalid buffer size argument")); | |
1524 | if (ctl.bufsize < 4096) | |
1525 | ctl.bufsize = 4096; | |
df1dddf9 | 1526 | break; |
42fac79a | 1527 | case 'T': |
776eabe7 | 1528 | ctl.time_fmt = DMESG_TIMEFTM_CTIME; |
42fac79a | 1529 | break; |
d74b8dfc | 1530 | case 't': |
776eabe7 | 1531 | ctl.time_fmt = DMESG_TIMEFTM_NONE; |
d74b8dfc | 1532 | break; |
25000180 | 1533 | case 'u': |
aca1633a | 1534 | ctl.fltr_fac = 1; |
738767b9 | 1535 | for (n = 1; (size_t) n < ARRAY_SIZE(facility_names); n++) |
aca1633a | 1536 | setbit(ctl.facilities, n); |
25000180 | 1537 | break; |
0fd12a96 | 1538 | case 'w': |
0fd12a96 KZ |
1539 | ctl.follow = 1; |
1540 | break; | |
d7881b0e KK |
1541 | case 'W': |
1542 | ctl.follow = 1; | |
1543 | ctl.end = 1; | |
1544 | break; | |
5ef05369 | 1545 | case 'x': |
aca1633a | 1546 | ctl.decode = 1; |
4a3b7949 | 1547 | break; |
babf605d SK |
1548 | case OPT_TIME_FORMAT: |
1549 | ctl.time_fmt = which_time_format(optarg); | |
1550 | break; | |
646bba41 KZ |
1551 | case OPT_NOESC: |
1552 | ctl.noesc = 1; | |
1553 | break; | |
732d7594 KZ |
1554 | case OPT_SINCE: |
1555 | { | |
1556 | usec_t p; | |
1557 | if (parse_timestamp(optarg, &p) < 0) | |
1558 | errx(EXIT_FAILURE, _("invalid time value \"%s\""), optarg); | |
1559 | ctl.since = (time_t) (p / 1000000); | |
1560 | break; | |
1561 | } | |
1562 | case OPT_UNTIL: | |
1563 | { | |
1564 | usec_t p; | |
1565 | if (parse_timestamp(optarg, &p) < 0) | |
1566 | errx(EXIT_FAILURE, _("invalid time value \"%s\""), optarg); | |
1567 | ctl.until = (time_t) (p / 1000000); | |
1568 | break; | |
1569 | } | |
2c308875 KZ |
1570 | case 'h': |
1571 | usage(); | |
1572 | case 'V': | |
1573 | print_version(EXIT_SUCCESS); | |
df1dddf9 | 1574 | default: |
677ec86c | 1575 | errtryhelp(EXIT_FAILURE); |
df1dddf9 KZ |
1576 | } |
1577 | } | |
e6c379eb | 1578 | |
6e1eda6f RM |
1579 | if (argc != optind) { |
1580 | warnx(_("bad usage")); | |
1581 | errtryhelp(EXIT_FAILURE); | |
1582 | } | |
6dbe3af9 | 1583 | |
506b5451 KZ |
1584 | if (ctl.json) { |
1585 | ctl.time_fmt = DMESG_TIMEFTM_TIME; | |
1586 | delta = 0; | |
1587 | ctl.force_prefix = 0; | |
1588 | ctl.raw = 0; | |
1589 | ctl.noesc = 1; | |
1590 | nopager = 1; | |
1591 | } | |
1592 | ||
74ce680a SK |
1593 | if ((is_timefmt(&ctl, RELTIME) || |
1594 | is_timefmt(&ctl, CTIME) || | |
c9667633 KZ |
1595 | is_timefmt(&ctl, ISO8601)) || |
1596 | ctl.since || | |
1597 | ctl.until) { | |
9bf622da KK |
1598 | if (dmesg_get_boot_time(&ctl.boot_time) != 0) |
1599 | ctl.time_fmt = DMESG_TIMEFTM_NONE; | |
1600 | else | |
1601 | ctl.suspended_time = dmesg_get_suspended_time(); | |
1602 | } | |
9bc2b51a | 1603 | |
776eabe7 SK |
1604 | if (delta) |
1605 | switch (ctl.time_fmt) { | |
1606 | case DMESG_TIMEFTM_CTIME: | |
1607 | ctl.time_fmt = DMESG_TIMEFTM_CTIME_DELTA; | |
1608 | break; | |
1609 | case DMESG_TIMEFTM_TIME: | |
1610 | ctl.time_fmt = DMESG_TIMEFTM_TIME_DELTA; | |
1611 | break; | |
e7ba987a SK |
1612 | case DMESG_TIMEFTM_ISO8601: |
1613 | warnx(_("--show-delta is ignored when used together with iso8601 time format")); | |
1614 | break; | |
776eabe7 SK |
1615 | default: |
1616 | ctl.time_fmt = DMESG_TIMEFTM_DELTA; | |
1617 | } | |
1618 | ||
776eabe7 | 1619 | |
506b5451 KZ |
1620 | if (!ctl.json) |
1621 | ctl.color = colors_init(colormode, "dmesg") ? 1 : 0; | |
5042cdcf KZ |
1622 | if (ctl.follow) |
1623 | nopager = 1; | |
aa192520 KZ |
1624 | ctl.pager = nopager ? 0 : ctl.pager; |
1625 | if (ctl.pager) | |
e215d467 | 1626 | pager_redirect(); |
aa192520 | 1627 | |
e6471b9f | 1628 | switch (ctl.action) { |
48c5c662 KZ |
1629 | case SYSLOG_ACTION_READ_ALL: |
1630 | case SYSLOG_ACTION_READ_CLEAR: | |
7af23060 KZ |
1631 | if (ctl.method == DMESG_METHOD_KMSG && init_kmsg(&ctl) != 0) |
1632 | ctl.method = DMESG_METHOD_SYSLOG; | |
1a38ad5c KZ |
1633 | |
1634 | if (ctl.raw | |
1635 | && ctl.method != DMESG_METHOD_KMSG | |
1636 | && (ctl.fltr_lev || ctl.fltr_fac)) | |
62698149 BS |
1637 | errx(EXIT_FAILURE, _("--raw can be used together with --level or " |
1638 | "--facility only when reading messages from /dev/kmsg")); | |
5f538ac4 PB |
1639 | |
1640 | /* only kmsg supports multi-line messages */ | |
1641 | if (ctl.force_prefix && ctl.method != DMESG_METHOD_KMSG) | |
1642 | ctl.force_prefix = 0; | |
aa192520 | 1643 | if (ctl.pager) |
e215d467 | 1644 | pager_redirect(); |
6e9b06cc KZ |
1645 | n = read_buffer(&ctl, &buf); |
1646 | if (n > 0) | |
1647 | print_buffer(&ctl, buf, n); | |
7ff1f63f | 1648 | if (!ctl.mmap_buff) |
c672220f | 1649 | free(buf); |
6e9b06cc KZ |
1650 | if (ctl.kmsg >= 0) |
1651 | close(ctl.kmsg); | |
506b5451 KZ |
1652 | if (ctl.json && ul_jsonwrt_is_ready(&ctl.jfmt)) { |
1653 | ul_jsonwrt_array_close(&ctl.jfmt); | |
1654 | ul_jsonwrt_root_close(&ctl.jfmt); | |
1655 | } | |
50cc6332 KZ |
1656 | if (n < 0) |
1657 | err(EXIT_FAILURE, _("read kernel buffer failed")); | |
0272f2ef | 1658 | else if (ctl.action == SYSLOG_ACTION_READ_CLEAR) |
50cc6332 KZ |
1659 | ; /* fallthrough */ |
1660 | else | |
1661 | break; | |
04199860 | 1662 | case SYSLOG_ACTION_CLEAR: |
50cc6332 KZ |
1663 | if (klogctl(SYSLOG_ACTION_CLEAR, NULL, 0) < 0) |
1664 | err(EXIT_FAILURE, _("clear kernel buffer failed")); | |
1665 | break; | |
2170174e KZ |
1666 | case SYSLOG_ACTION_CONSOLE_OFF: |
1667 | case SYSLOG_ACTION_CONSOLE_ON: | |
6e9b06cc | 1668 | klog_rc = klogctl(ctl.action, NULL, 0); |
04199860 | 1669 | break; |
48c5c662 | 1670 | case SYSLOG_ACTION_CONSOLE_LEVEL: |
6e9b06cc | 1671 | klog_rc = klogctl(ctl.action, NULL, console_level); |
48c5c662 KZ |
1672 | break; |
1673 | default: | |
1674 | errx(EXIT_FAILURE, _("unsupported command")); | |
1675 | break; | |
df1dddf9 | 1676 | } |
6dbe3af9 | 1677 | |
7af23060 | 1678 | |
6e9b06cc | 1679 | if (klog_rc) |
15103c4b | 1680 | err(EXIT_FAILURE, _("klogctl failed")); |
6dbe3af9 | 1681 | |
15103c4b | 1682 | return EXIT_SUCCESS; |
6dbe3af9 | 1683 | } |