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Commit | Line | Data |
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5ef05369 | 1 | /* |
9abd5e4b KZ |
2 | * SPDX-License-Identifier: GPL-2.0-or-later |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
5ef05369 | 9 | * dmesg.c -- Print out the contents of the kernel ring buffer |
7eda085c | 10 | * |
5ef05369 | 11 | * Copyright (C) 1993 Theodore Ts'o <tytso@athena.mit.edu> |
9abd5e4b | 12 | * Copyright (C) 2011-2023 Karel Zak <kzak@redhat.com> |
6dbe3af9 | 13 | */ |
6dbe3af9 KZ |
14 | #include <stdio.h> |
15 | #include <getopt.h> | |
467a5b31 | 16 | #include <stdbool.h> |
fd6b7a7f | 17 | #include <stdlib.h> |
467a5b31 | 18 | #include <string.h> |
15673c15 | 19 | #include <sys/klog.h> |
f06ec64f | 20 | #include <sys/syslog.h> |
bd304d92 | 21 | #include <sys/time.h> |
42fac79a | 22 | #include <sys/sysinfo.h> |
15103c4b | 23 | #include <ctype.h> |
bd304d92 | 24 | #include <time.h> |
c672220f KZ |
25 | #include <sys/mman.h> |
26 | #include <sys/types.h> | |
27 | #include <sys/stat.h> | |
28 | #include <unistd.h> | |
29 | #include <fcntl.h> | |
5423ccb1 | 30 | |
15103c4b | 31 | #include "c.h" |
098ce273 | 32 | #include "colors.h" |
5423ccb1 | 33 | #include "nls.h" |
15673c15 | 34 | #include "strutils.h" |
15103c4b | 35 | #include "xalloc.h" |
b8300c0a | 36 | #include "widechar.h" |
e12c9866 | 37 | #include "all-io.h" |
636a6207 | 38 | #include "bitops.h" |
efb8854f | 39 | #include "closestream.h" |
94920134 | 40 | #include "optutils.h" |
d12d063b | 41 | #include "timeutils.h" |
cd2876d2 | 42 | #include "monotonic.h" |
ddca870a | 43 | #include "mangle.h" |
aa192520 | 44 | #include "pager.h" |
506b5451 | 45 | #include "jsonwrt.h" |
467a5b31 | 46 | #include "pathnames.h" |
6dbe3af9 | 47 | |
59a14899 KZ |
48 | /* Close the log. Currently a NOP. */ |
49 | #define SYSLOG_ACTION_CLOSE 0 | |
50 | /* Open the log. Currently a NOP. */ | |
51 | #define SYSLOG_ACTION_OPEN 1 | |
52 | /* Read from the log. */ | |
53 | #define SYSLOG_ACTION_READ 2 | |
54 | /* Read all messages remaining in the ring buffer. (allowed for non-root) */ | |
55 | #define SYSLOG_ACTION_READ_ALL 3 | |
56 | /* Read and clear all messages remaining in the ring buffer */ | |
57 | #define SYSLOG_ACTION_READ_CLEAR 4 | |
58 | /* Clear ring buffer. */ | |
59 | #define SYSLOG_ACTION_CLEAR 5 | |
60 | /* Disable printk's to console */ | |
61 | #define SYSLOG_ACTION_CONSOLE_OFF 6 | |
62 | /* Enable printk's to console */ | |
63 | #define SYSLOG_ACTION_CONSOLE_ON 7 | |
64 | /* Set level of messages printed to console */ | |
65 | #define SYSLOG_ACTION_CONSOLE_LEVEL 8 | |
66 | /* Return number of unread characters in the log buffer */ | |
67 | #define SYSLOG_ACTION_SIZE_UNREAD 9 | |
68 | /* Return size of the log buffer */ | |
69 | #define SYSLOG_ACTION_SIZE_BUFFER 10 | |
70 | ||
467a5b31 EC |
71 | #define PID_CHARS_MAX sizeof(stringify_value(LONG_MAX)) |
72 | #define PID_CHARS_DEFAULT sizeof(stringify_value(INT_MAX)) | |
73 | #define SYSLOG_DEFAULT_CALLER_ID_CHARS sizeof(stringify_value(SHRT_MAX))-1 | |
74 | #define DMESG_CALLER_PREFIX "caller=" | |
75 | #define DMESG_CALLER_PREFIXSZ (sizeof(DMESG_CALLER_PREFIX)-1) | |
76 | ||
5aaee63c | 77 | /* |
f4bc7f96 | 78 | * Color scheme |
5aaee63c | 79 | */ |
f4bc7f96 KZ |
80 | struct dmesg_color { |
81 | const char *scheme; /* name used in termina-colors.d/dmesg.scheme */ | |
82 | const char *dflt; /* default color ESC sequence */ | |
83 | }; | |
84 | ||
85 | enum { | |
86 | DMESG_COLOR_SUBSYS, | |
87 | DMESG_COLOR_TIME, | |
33ecab2b | 88 | DMESG_COLOR_TIMEBREAK, |
f4bc7f96 KZ |
89 | DMESG_COLOR_ALERT, |
90 | DMESG_COLOR_CRIT, | |
91 | DMESG_COLOR_ERR, | |
92 | DMESG_COLOR_WARN, | |
93 | DMESG_COLOR_SEGFAULT | |
94 | }; | |
95 | ||
96 | static const struct dmesg_color colors[] = | |
97 | { | |
98 | [DMESG_COLOR_SUBSYS] = { "subsys", UL_COLOR_BROWN }, | |
99 | [DMESG_COLOR_TIME] = { "time", UL_COLOR_GREEN }, | |
33ecab2b | 100 | [DMESG_COLOR_TIMEBREAK] = { "timebreak",UL_COLOR_GREEN UL_COLOR_BOLD }, |
f4bc7f96 KZ |
101 | [DMESG_COLOR_ALERT] = { "alert", UL_COLOR_REVERSE UL_COLOR_RED }, |
102 | [DMESG_COLOR_CRIT] = { "crit", UL_COLOR_BOLD UL_COLOR_RED }, | |
103 | [DMESG_COLOR_ERR] = { "err", UL_COLOR_RED }, | |
104 | [DMESG_COLOR_WARN] = { "warn", UL_COLOR_BOLD }, | |
105 | [DMESG_COLOR_SEGFAULT] = { "segfault", UL_COLOR_HALFBRIGHT UL_COLOR_RED } | |
106 | }; | |
107 | ||
108 | #define dmesg_enable_color(_id) \ | |
109 | color_scheme_enable(colors[_id].scheme, colors[_id].dflt); | |
5aaee63c | 110 | |
f06ec64f | 111 | /* |
5ef05369 | 112 | * Priority and facility names |
f06ec64f KZ |
113 | */ |
114 | struct dmesg_name { | |
115 | const char *name; | |
116 | const char *help; | |
117 | }; | |
118 | ||
5ef05369 KZ |
119 | /* |
120 | * Priority names -- based on sys/syslog.h | |
121 | */ | |
f06ec64f KZ |
122 | static const struct dmesg_name level_names[] = |
123 | { | |
124 | [LOG_EMERG] = { "emerg", N_("system is unusable") }, | |
125 | [LOG_ALERT] = { "alert", N_("action must be taken immediately") }, | |
126 | [LOG_CRIT] = { "crit", N_("critical conditions") }, | |
127 | [LOG_ERR] = { "err", N_("error conditions") }, | |
128 | [LOG_WARNING] = { "warn", N_("warning conditions") }, | |
129 | [LOG_NOTICE] = { "notice",N_("normal but significant condition") }, | |
130 | [LOG_INFO] = { "info", N_("informational") }, | |
131 | [LOG_DEBUG] = { "debug", N_("debug-level messages") } | |
132 | }; | |
133 | ||
85f3cc55 KZ |
134 | /* |
135 | * sys/syslog.h uses (f << 3) for all facility codes. | |
9e930041 | 136 | * We want to use the codes as array indexes, so shift back... |
85f3cc55 KZ |
137 | * |
138 | * Note that libc LOG_FAC() macro returns the base codes, not the | |
139 | * shifted code :-) | |
140 | */ | |
141 | #define FAC_BASE(f) ((f) >> 3) | |
38a4480b | 142 | #define LOG_RAW_FAC_PRI(fac, pri) ((fac << 3) | pri) |
85f3cc55 KZ |
143 | |
144 | static const struct dmesg_name facility_names[] = | |
145 | { | |
146 | [FAC_BASE(LOG_KERN)] = { "kern", N_("kernel messages") }, | |
147 | [FAC_BASE(LOG_USER)] = { "user", N_("random user-level messages") }, | |
148 | [FAC_BASE(LOG_MAIL)] = { "mail", N_("mail system") }, | |
149 | [FAC_BASE(LOG_DAEMON)] = { "daemon", N_("system daemons") }, | |
150 | [FAC_BASE(LOG_AUTH)] = { "auth", N_("security/authorization messages") }, | |
151 | [FAC_BASE(LOG_SYSLOG)] = { "syslog", N_("messages generated internally by syslogd") }, | |
152 | [FAC_BASE(LOG_LPR)] = { "lpr", N_("line printer subsystem") }, | |
153 | [FAC_BASE(LOG_NEWS)] = { "news", N_("network news subsystem") }, | |
154 | [FAC_BASE(LOG_UUCP)] = { "uucp", N_("UUCP subsystem") }, | |
155 | [FAC_BASE(LOG_CRON)] = { "cron", N_("clock daemon") }, | |
156 | [FAC_BASE(LOG_AUTHPRIV)] = { "authpriv", N_("security/authorization messages (private)") }, | |
4df28845 | 157 | [FAC_BASE(LOG_FTP)] = { "ftp", N_("FTP daemon") }, |
04056728 TW |
158 | [FAC_BASE(LOG_FTP) + 1] = { "res0", N_("reserved 0") }, |
159 | [FAC_BASE(LOG_FTP) + 2] = { "res1", N_("reserved 1") }, | |
160 | [FAC_BASE(LOG_FTP) + 3] = { "res2", N_("reserved 2") }, | |
161 | [FAC_BASE(LOG_FTP) + 4] = { "res3", N_("reserved 3") }, | |
162 | [FAC_BASE(LOG_LOCAL0)] = { "local0", N_("local use 0") }, | |
163 | [FAC_BASE(LOG_LOCAL1)] = { "local1", N_("local use 1") }, | |
164 | [FAC_BASE(LOG_LOCAL2)] = { "local2", N_("local use 2") }, | |
165 | [FAC_BASE(LOG_LOCAL3)] = { "local3", N_("local use 3") }, | |
166 | [FAC_BASE(LOG_LOCAL4)] = { "local4", N_("local use 4") }, | |
167 | [FAC_BASE(LOG_LOCAL5)] = { "local5", N_("local use 5") }, | |
168 | [FAC_BASE(LOG_LOCAL6)] = { "local6", N_("local use 6") }, | |
169 | [FAC_BASE(LOG_LOCAL7)] = { "local7", N_("local use 7") }, | |
85f3cc55 KZ |
170 | }; |
171 | ||
e6471b9f KZ |
172 | /* supported methods to read message buffer |
173 | */ | |
174 | enum { | |
7af23060 | 175 | DMESG_METHOD_KMSG, /* read messages from /dev/kmsg (default) */ |
e6471b9f KZ |
176 | DMESG_METHOD_SYSLOG, /* klogctl() buffer */ |
177 | DMESG_METHOD_MMAP /* mmap file with records (see --file) */ | |
178 | }; | |
179 | ||
776eabe7 SK |
180 | enum { |
181 | DMESG_TIMEFTM_NONE = 0, | |
182 | DMESG_TIMEFTM_CTIME, /* [ctime] */ | |
183 | DMESG_TIMEFTM_CTIME_DELTA, /* [ctime <delta>] */ | |
184 | DMESG_TIMEFTM_DELTA, /* [<delta>] */ | |
185 | DMESG_TIMEFTM_RELTIME, /* [relative] */ | |
186 | DMESG_TIMEFTM_TIME, /* [time] */ | |
8a8be309 | 187 | DMESG_TIMEFTM_TIME_DELTA, /* [time <delta>] */ |
423ed6e6 KZ |
188 | DMESG_TIMEFTM_ISO8601, /* 2013-06-13T22:11:00,123456+0100 */ |
189 | ||
190 | __DMESG_TIMEFTM_COUNT | |
776eabe7 | 191 | }; |
423ed6e6 KZ |
192 | |
193 | #define DMESG_TIMEFTM_DEFAULT DMESG_TIMEFTM_TIME | |
776eabe7 | 194 | |
aca1633a KZ |
195 | struct dmesg_control { |
196 | /* bit arrays -- see include/bitops.h */ | |
197 | char levels[ARRAY_SIZE(level_names) / NBBY + 1]; | |
198 | char facilities[ARRAY_SIZE(facility_names) / NBBY + 1]; | |
199 | ||
bd304d92 | 200 | struct timeval lasttime; /* last printed timestamp */ |
60464b1f | 201 | struct tm lasttm; /* last localtime */ |
3c5384d0 | 202 | struct timeval boot_time; /* system boot time */ |
02f3ecd6 | 203 | usec_t suspended_time; /* time spent in suspended state */ |
bd304d92 | 204 | |
e6471b9f KZ |
205 | int action; /* SYSLOG_ACTION_* */ |
206 | int method; /* DMESG_METHOD_* */ | |
298a073c KZ |
207 | |
208 | size_t bufsize; /* size of syslog buffer */ | |
209 | ||
7af23060 | 210 | int kmsg; /* /dev/kmsg file descriptor */ |
298a073c | 211 | ssize_t kmsg_first_read;/* initial read() return code */ |
efb18899 | 212 | /* |
213 | * the kernel will give EINVAL if we do read() on /proc/kmsg with | |
214 | * length insufficient for the next message. messages may be up to | |
215 | * PRINTK_MESSAGE_MAX, which is defined as 2048, so we must be | |
216 | * able to buffer at least that much in one call | |
217 | */ | |
218 | char kmsg_buf[2048]; /* buffer to read kmsg data */ | |
e6471b9f | 219 | |
d1e5764c TW |
220 | usec_t since; /* filter records by time */ |
221 | usec_t until; /* filter records by time */ | |
732d7594 | 222 | |
c672220f KZ |
223 | /* |
224 | * For the --file option we mmap whole file. The unnecessary (already | |
225 | * printed) pages are always unmapped. The result is that we have in | |
455fe9a0 | 226 | * memory only the currently used page(s). |
c672220f | 227 | */ |
9b3a6984 | 228 | char *filename; |
c672220f KZ |
229 | char *mmap_buff; |
230 | size_t pagesize; | |
3de2e556 | 231 | size_t ntime_fmts; |
423ed6e6 | 232 | unsigned int time_fmts[2 * __DMESG_TIMEFTM_COUNT]; /* time format */ |
c672220f | 233 | |
506b5451 KZ |
234 | struct ul_jsonwrt jfmt; /* -J formatting */ |
235 | ||
0fd12a96 | 236 | unsigned int follow:1, /* wait for new messages */ |
d7881b0e | 237 | end:1, /* seek to the of buffer */ |
0fd12a96 | 238 | raw:1, /* raw mode */ |
646bba41 | 239 | noesc:1, /* no escape */ |
9feec79c KZ |
240 | fltr_lev:1, /* filter out by levels[] */ |
241 | fltr_fac:1, /* filter out by facilities[] */ | |
242 | decode:1, /* use "facility: level: " prefix */ | |
aa192520 | 243 | pager:1, /* pipe output into a pager */ |
5f538ac4 | 244 | color:1, /* colorize messages */ |
506b5451 | 245 | json:1, /* JSON output */ |
5f538ac4 PB |
246 | force_prefix:1; /* force timestamp and decode prefix |
247 | on each line */ | |
b45c3da2 | 248 | int indent; /* due to timestamps if newline */ |
467a5b31 | 249 | size_t caller_id_size; /* PRINTK_CALLERID max field size */ |
aca1633a | 250 | }; |
f4fa5b44 | 251 | |
a7ee94f2 KZ |
252 | struct dmesg_record { |
253 | const char *mesg; | |
254 | size_t mesg_size; | |
255 | ||
256 | int level; | |
257 | int facility; | |
bd304d92 | 258 | struct timeval tv; |
467a5b31 | 259 | char caller_id[PID_CHARS_MAX]; |
a7ee94f2 KZ |
260 | |
261 | const char *next; /* buffer with next unparsed record */ | |
262 | size_t next_size; /* size of the next buffer */ | |
263 | }; | |
264 | ||
ddca870a KZ |
265 | #define INIT_DMESG_RECORD(_r) do { \ |
266 | (_r)->mesg = NULL; \ | |
267 | (_r)->mesg_size = 0; \ | |
268 | (_r)->facility = -1; \ | |
269 | (_r)->level = -1; \ | |
270 | (_r)->tv.tv_sec = 0; \ | |
271 | (_r)->tv.tv_usec = 0; \ | |
467a5b31 | 272 | (_r)->caller_id[0] = 0; \ |
ddca870a KZ |
273 | } while (0) |
274 | ||
d8253226 | 275 | static int process_kmsg(struct dmesg_control *ctl); |
01c54718 | 276 | static int process_kmsg_file(struct dmesg_control *ctl, char **buf); |
ddca870a | 277 | |
5aaee63c | 278 | static int set_level_color(int log_level, const char *mesg, size_t mesgsz) |
098ce273 | 279 | { |
f4bc7f96 KZ |
280 | int id = -1; |
281 | ||
098ce273 OO |
282 | switch (log_level) { |
283 | case LOG_ALERT: | |
f4bc7f96 KZ |
284 | id = DMESG_COLOR_ALERT; |
285 | break; | |
098ce273 | 286 | case LOG_CRIT: |
f4bc7f96 KZ |
287 | id = DMESG_COLOR_CRIT; |
288 | break; | |
098ce273 | 289 | case LOG_ERR: |
f4bc7f96 KZ |
290 | id = DMESG_COLOR_ERR; |
291 | break; | |
5aaee63c | 292 | case LOG_WARNING: |
f4bc7f96 KZ |
293 | id = DMESG_COLOR_WARN; |
294 | break; | |
098ce273 OO |
295 | default: |
296 | break; | |
297 | } | |
298 | ||
9e930041 | 299 | /* well, sometimes the messages contains important keywords, but in |
5aaee63c KZ |
300 | * non-warning/error messages |
301 | */ | |
f4bc7f96 KZ |
302 | if (id < 0 && memmem(mesg, mesgsz, "segfault at", 11)) |
303 | id = DMESG_COLOR_SEGFAULT; | |
5aaee63c | 304 | |
f4bc7f96 KZ |
305 | if (id >= 0) |
306 | dmesg_enable_color(id); | |
307 | ||
308 | return id >= 0 ? 0 : -1; | |
098ce273 | 309 | } |
ddca870a | 310 | |
6e1eda6f | 311 | static void __attribute__((__noreturn__)) usage(void) |
15103c4b | 312 | { |
6e1eda6f | 313 | FILE *out = stdout; |
738767b9 | 314 | size_t i; |
f06ec64f | 315 | |
fbbc4c88 SK |
316 | fputs(USAGE_HEADER, out); |
317 | fprintf(out, _(" %s [options]\n"), program_invocation_short_name); | |
451dbcfa BS |
318 | |
319 | fputs(USAGE_SEPARATOR, out); | |
320 | fputs(_("Display or control the kernel ring buffer.\n"), out); | |
321 | ||
fbbc4c88 SK |
322 | fputs(USAGE_OPTIONS, out); |
323 | fputs(_(" -C, --clear clear the kernel ring buffer\n"), out); | |
324 | fputs(_(" -c, --read-clear read and clear all messages\n"), out); | |
325 | fputs(_(" -D, --console-off disable printing messages to console\n"), out); | |
fbbc4c88 SK |
326 | fputs(_(" -E, --console-on enable printing messages to console\n"), out); |
327 | fputs(_(" -F, --file <file> use the file instead of the kernel log buffer\n"), out); | |
01c54718 | 328 | fputs(_(" -K, --kmsg-file <file> use the file in kmsg format\n"), out); |
fbbc4c88 | 329 | fputs(_(" -f, --facility <list> restrict output to defined facilities\n"), out); |
f0a3a1ca | 330 | fputs(_(" -H, --human human readable output\n"), out); |
506b5451 | 331 | fputs(_(" -J, --json use JSON output format\n"), out); |
fbbc4c88 | 332 | fputs(_(" -k, --kernel display kernel messages\n"), out); |
a7466bdc SK |
333 | fprintf(out, |
334 | _(" -L, --color[=<when>] colorize messages (%s, %s or %s)\n"), "auto", "always", "never"); | |
5d51dc2a KZ |
335 | fprintf(out, |
336 | " %s\n", USAGE_COLORS_DEFAULT); | |
fbbc4c88 SK |
337 | fputs(_(" -l, --level <list> restrict output to defined levels\n"), out); |
338 | fputs(_(" -n, --console-level <level> set level of messages printed to console\n"), out); | |
aa192520 | 339 | fputs(_(" -P, --nopager do not pipe output into a pager\n"), out); |
5f538ac4 | 340 | fputs(_(" -p, --force-prefix force timestamp output on each line of multi-line messages\n"), out); |
fbbc4c88 | 341 | fputs(_(" -r, --raw print the raw message buffer\n"), out); |
646bba41 | 342 | fputs(_(" --noescape don't escape unprintable character\n"), out); |
fbbc4c88 SK |
343 | fputs(_(" -S, --syslog force to use syslog(2) rather than /dev/kmsg\n"), out); |
344 | fputs(_(" -s, --buffer-size <size> buffer size to query the kernel ring buffer\n"), out); | |
fbbc4c88 SK |
345 | fputs(_(" -u, --userspace display userspace messages\n"), out); |
346 | fputs(_(" -w, --follow wait for new messages\n"), out); | |
d7881b0e | 347 | fputs(_(" -W, --follow-new wait and print only new messages\n"), out); |
fbbc4c88 | 348 | fputs(_(" -x, --decode decode facility and level to readable string\n"), out); |
06dd56f9 SK |
349 | fputs(_(" -d, --show-delta show time delta between printed messages\n"), out); |
350 | fputs(_(" -e, --reltime show local time and time delta in readable format\n"), out); | |
0825fe16 BS |
351 | fputs(_(" -T, --ctime show human-readable timestamp (may be inaccurate!)\n"), out); |
352 | fputs(_(" -t, --notime don't show any timestamp with messages\n"), out); | |
353 | fputs(_(" --time-format <format> show timestamp using the given format:\n" | |
3de2e556 | 354 | " [delta|reltime|ctime|notime|iso|raw]\n" |
06dd56f9 | 355 | "Suspending/resume will make ctime and iso timestamps inaccurate.\n"), out); |
732d7594 KZ |
356 | fputs(_(" --since <time> display the lines since the specified time\n"), out); |
357 | fputs(_(" --until <time> display the lines until the specified time\n"), out); | |
358 | ||
fbbc4c88 | 359 | fputs(USAGE_SEPARATOR, out); |
bad4c729 | 360 | fprintf(out, USAGE_HELP_OPTIONS(29)); |
dcd16b0f | 361 | fputs(_("\nSupported log facilities:\n"), out); |
e07c072c | 362 | for (i = 0; i < ARRAY_SIZE(facility_names); i++) |
963ac507 | 363 | fprintf(out, " %7s - %s\n", |
fbbc4c88 SK |
364 | facility_names[i].name, |
365 | _(facility_names[i].help)); | |
85f3cc55 | 366 | |
dcd16b0f | 367 | fputs(_("\nSupported log levels (priorities):\n"), out); |
fbbc4c88 | 368 | for (i = 0; i < ARRAY_SIZE(level_names); i++) |
963ac507 | 369 | fprintf(out, " %7s - %s\n", |
fbbc4c88 SK |
370 | level_names[i].name, |
371 | _(level_names[i].help)); | |
b3054454 | 372 | |
bad4c729 | 373 | fprintf(out, USAGE_MAN_TAIL("dmesg(1)")); |
6e1eda6f | 374 | exit(EXIT_SUCCESS); |
6dbe3af9 KZ |
375 | } |
376 | ||
3de2e556 RT |
377 | static void reset_time_fmts(struct dmesg_control *ctl) |
378 | { | |
379 | memset(ctl->time_fmts, 0, | |
423ed6e6 KZ |
380 | __DMESG_TIMEFTM_COUNT * sizeof(*(ctl->time_fmts))); |
381 | ctl->time_fmts[0] = DMESG_TIMEFTM_DEFAULT; | |
3de2e556 RT |
382 | } |
383 | ||
384 | static int is_time_fmt_set(struct dmesg_control *ctl, unsigned int time_format) | |
385 | { | |
386 | size_t i; | |
387 | ||
388 | if (ctl->ntime_fmts == 0) | |
423ed6e6 | 389 | return time_format == DMESG_TIMEFTM_DEFAULT; |
3de2e556 | 390 | |
423ed6e6 | 391 | for (i = 0; i < ctl->ntime_fmts; i++) { |
3de2e556 RT |
392 | if (ctl->time_fmts[i] == time_format) |
393 | return 1; | |
423ed6e6 | 394 | } |
3de2e556 RT |
395 | return 0; |
396 | } | |
397 | ||
398 | static void include_time_fmt(struct dmesg_control *ctl, unsigned int time_format) | |
399 | { | |
400 | if (ctl->ntime_fmts > 0 && is_time_fmt_set(ctl, time_format)) | |
401 | return; | |
402 | ||
423ed6e6 | 403 | if (ctl->ntime_fmts < __DMESG_TIMEFTM_COUNT) |
3de2e556 RT |
404 | ctl->time_fmts[ctl->ntime_fmts++] = time_format; |
405 | } | |
406 | ||
407 | static void exclude_time_fmt(struct dmesg_control *ctl, unsigned int time_format) | |
408 | { | |
409 | size_t idx = 0; | |
410 | ||
411 | while (idx < ctl->ntime_fmts && ctl->time_fmts[idx] != time_format) | |
412 | idx++; | |
413 | ||
414 | if (idx < ctl->ntime_fmts && ctl->time_fmts[idx] == time_format) { | |
415 | while (idx + 1 < ctl->ntime_fmts) { | |
416 | ctl->time_fmts[idx] = ctl->time_fmts[idx+1]; | |
417 | idx++; | |
418 | } | |
419 | ctl->ntime_fmts--; | |
420 | if (ctl->ntime_fmts == 0) | |
421 | reset_time_fmts(ctl); | |
422 | } | |
423 | } | |
424 | ||
5ef05369 KZ |
425 | /* |
426 | * LEVEL ::= <number> | <name> | |
8c8fa302 BM |
427 | * <number> ::= @len is set: number in range <0..N>, where N < ARRAY_SIZE(level_names) |
428 | * ::= @len not set: number in range <1..N>, where N <= ARRAY_SIZE(level_names) | |
5ef05369 | 429 | * <name> ::= case-insensitive text |
8c8fa302 BM |
430 | * |
431 | * Note that @len argument is not set when parsing "-n <level>" command line | |
9e930041 | 432 | * option. The console_level is interpreted as "log level less than the value". |
8c8fa302 BM |
433 | * |
434 | * For example "dmesg -n 8" or "dmesg -n debug" enables debug console log | |
435 | * level by klogctl(SYSLOG_ACTION_CONSOLE_LEVEL, NULL, 8). The @str argument | |
436 | * has to be parsed to number in range <1..8>. | |
5ef05369 | 437 | */ |
5c8f6bc6 | 438 | static int parse_level(const char *str, size_t len) |
f06ec64f | 439 | { |
8c8fa302 BM |
440 | int offset = 0; |
441 | ||
5c8f6bc6 | 442 | if (!str) |
f06ec64f | 443 | return -1; |
8c8fa302 | 444 | if (!len) { |
5c8f6bc6 | 445 | len = strlen(str); |
8c8fa302 BM |
446 | offset = 1; |
447 | } | |
5c8f6bc6 | 448 | errno = 0; |
f06ec64f | 449 | |
5c8f6bc6 KZ |
450 | if (isdigit(*str)) { |
451 | char *end = NULL; | |
8c8fa302 | 452 | long x = strtol(str, &end, 10) - offset; |
5c8f6bc6 | 453 | |
738767b9 KZ |
454 | if (!errno && end && end > str && (size_t) (end - str) == len && |
455 | x >= 0 && (size_t) x < ARRAY_SIZE(level_names)) | |
8c8fa302 | 456 | return x + offset; |
5c8f6bc6 | 457 | } else { |
738767b9 KZ |
458 | size_t i; |
459 | ||
5c8f6bc6 KZ |
460 | for (i = 0; i < ARRAY_SIZE(level_names); i++) { |
461 | const char *n = level_names[i].name; | |
462 | ||
463 | if (strncasecmp(str, n, len) == 0 && *(n + len) == '\0') | |
8c8fa302 | 464 | return i + offset; |
5c8f6bc6 KZ |
465 | } |
466 | } | |
467 | ||
468 | if (errno) | |
469 | err(EXIT_FAILURE, _("failed to parse level '%s'"), str); | |
470 | ||
471 | errx(EXIT_FAILURE, _("unknown level '%s'"), str); | |
f06ec64f KZ |
472 | return -1; |
473 | } | |
474 | ||
5ef05369 KZ |
475 | /* |
476 | * FACILITY ::= <number> | <name> | |
477 | * <number> ::= number in range <0..N>, where N < ARRAY_SIZE(facility_names) | |
478 | * <name> ::= case-insensitive text | |
479 | */ | |
0e24df3b KZ |
480 | static int parse_facility(const char *str, size_t len) |
481 | { | |
0e24df3b KZ |
482 | if (!str) |
483 | return -1; | |
484 | if (!len) | |
485 | len = strlen(str); | |
486 | errno = 0; | |
487 | ||
488 | if (isdigit(*str)) { | |
489 | char *end = NULL; | |
738767b9 | 490 | long x = strtol(str, &end, 10); |
0e24df3b | 491 | |
738767b9 KZ |
492 | if (!errno && end && end > str && (size_t) (end - str) == len && |
493 | x >= 0 && (size_t) x < ARRAY_SIZE(facility_names)) | |
494 | return x; | |
0e24df3b | 495 | } else { |
738767b9 KZ |
496 | size_t i; |
497 | ||
0e24df3b KZ |
498 | for (i = 0; i < ARRAY_SIZE(facility_names); i++) { |
499 | const char *n = facility_names[i].name; | |
500 | ||
501 | if (strncasecmp(str, n, len) == 0 && *(n + len) == '\0') | |
502 | return i; | |
503 | } | |
504 | } | |
505 | ||
506 | if (errno) | |
507 | err(EXIT_FAILURE, _("failed to parse facility '%s'"), str); | |
508 | ||
509 | errx(EXIT_FAILURE, _("unknown facility '%s'"), str); | |
510 | return -1; | |
511 | } | |
512 | ||
5ef05369 KZ |
513 | /* |
514 | * Parses numerical prefix used for all messages in kernel ring buffer. | |
515 | * | |
516 | * Priorities/facilities are encoded into a single 32-bit quantity, where the | |
517 | * bottom 3 bits are the priority (0-7) and the top 28 bits are the facility | |
518 | * (0-big number). | |
519 | * | |
ddca870a | 520 | * Note that the number has to end with '>' or ',' char. |
5ef05369 | 521 | */ |
636a6207 KZ |
522 | static const char *parse_faclev(const char *str, int *fac, int *lev) |
523 | { | |
524 | long num; | |
525 | char *end = NULL; | |
526 | ||
527 | if (!str) | |
528 | return str; | |
529 | ||
530 | errno = 0; | |
531 | num = strtol(str, &end, 10); | |
532 | ||
533 | if (!errno && end && end > str) { | |
534 | *fac = LOG_FAC(num); | |
535 | *lev = LOG_PRI(num); | |
85f3cc55 | 536 | |
738767b9 | 537 | if (*lev < 0 || (size_t) *lev > ARRAY_SIZE(level_names)) |
85f3cc55 | 538 | *lev = -1; |
738767b9 | 539 | if (*fac < 0 || (size_t) *fac > ARRAY_SIZE(facility_names)) |
85f3cc55 | 540 | *fac = -1; |
ddca870a | 541 | return end + 1; /* skip '<' or ',' */ |
636a6207 KZ |
542 | } |
543 | ||
544 | return str; | |
545 | } | |
546 | ||
ddca870a KZ |
547 | /* |
548 | * Parses timestamp from syslog message prefix, expected format: | |
549 | * | |
550 | * seconds.microseconds] | |
551 | * | |
552 | * the ']' is the timestamp field terminator. | |
553 | */ | |
554 | static const char *parse_syslog_timestamp(const char *str0, struct timeval *tv) | |
bd304d92 KZ |
555 | { |
556 | const char *str = str0; | |
557 | char *end = NULL; | |
558 | ||
559 | if (!str0) | |
560 | return str0; | |
561 | ||
562 | errno = 0; | |
563 | tv->tv_sec = strtol(str, &end, 10); | |
564 | ||
565 | if (!errno && end && *end == '.' && *(end + 1)) { | |
566 | str = end + 1; | |
567 | end = NULL; | |
568 | tv->tv_usec = strtol(str, &end, 10); | |
569 | } | |
570 | if (errno || !end || end == str || *end != ']') | |
571 | return str0; | |
572 | ||
573 | return end + 1; /* skip ']' */ | |
574 | } | |
575 | ||
ddca870a KZ |
576 | /* |
577 | * Parses timestamp from /dev/kmsg, expected formats: | |
578 | * | |
579 | * microseconds, | |
580 | * microseconds; | |
581 | * | |
582 | * the ',' is fields separators and ';' items terminator (for the last item) | |
583 | */ | |
584 | static const char *parse_kmsg_timestamp(const char *str0, struct timeval *tv) | |
585 | { | |
586 | const char *str = str0; | |
587 | char *end = NULL; | |
588 | uint64_t usec; | |
589 | ||
590 | if (!str0) | |
591 | return str0; | |
592 | ||
593 | errno = 0; | |
594 | usec = strtoumax(str, &end, 10); | |
595 | ||
596 | if (!errno && end && (*end == ';' || *end == ',')) { | |
899f554f TW |
597 | tv->tv_usec = usec % USEC_PER_SEC; |
598 | tv->tv_sec = usec / USEC_PER_SEC; | |
ddca870a KZ |
599 | } else |
600 | return str0; | |
601 | ||
602 | return end + 1; /* skip separator */ | |
603 | } | |
604 | ||
bd304d92 KZ |
605 | static double time_diff(struct timeval *a, struct timeval *b) |
606 | { | |
899f554f | 607 | return (a->tv_sec - b->tv_sec) + (a->tv_usec - b->tv_usec) / USEC_PER_SEC; |
bd304d92 KZ |
608 | } |
609 | ||
7ff1f63f | 610 | static int get_syslog_buffer_size(void) |
eed99b2a KZ |
611 | { |
612 | int n = klogctl(SYSLOG_ACTION_SIZE_BUFFER, NULL, 0); | |
613 | ||
614 | return n > 0 ? n : 0; | |
615 | } | |
616 | ||
467a5b31 EC |
617 | /* |
618 | * Get the number of characters needed to hold the maximum number | |
619 | * of tasks this system supports. This size of string could hold | |
620 | * a thread id large enough for the highest thread id. | |
621 | * This is needed to determine the number of characters reserved for | |
622 | * the PRINTK_CALLER field if it has been configured in the Linux Kernel. | |
623 | * | |
624 | * The number of digits sets the max value since the value can't exceed | |
625 | * a value of that size. The /proc field defined by _PATH_PROC_PIDMAX | |
626 | * holds the maximum number of PID values that may be ussed by the system, | |
627 | * so 0 to that value minus one. | |
628 | * | |
629 | * For determining the size of the PRINTK_CALLER field, we make the safe | |
630 | * assumption that the number of threads >= number of cpus. This because | |
631 | * the PRINTK_CALLER field can hold either a thread id or a CPU id value. | |
632 | * | |
633 | * If we can't access the pid max kernel proc entry we assign a default | |
634 | * field size of 5 characters as that is what the old syslog interface | |
635 | * uses as the reserved field size. This is justified because 32-bit Linux | |
636 | * systems are limited to PID values between (0-32767). | |
637 | * | |
638 | */ | |
639 | static size_t max_threads_id_size(void) | |
640 | { | |
641 | char taskmax[PID_CHARS_MAX] = {'\0'}; | |
642 | ssize_t rdsize; | |
643 | int fd; | |
644 | ||
645 | fd = open(_PATH_PROC_PIDMAX, O_RDONLY); | |
646 | if (fd == -1) | |
647 | return PID_CHARS_DEFAULT; | |
648 | ||
649 | rdsize = read(fd, taskmax, sizeof(taskmax)); | |
dd13d516 KZ |
650 | close(fd); |
651 | ||
467a5b31 EC |
652 | if (rdsize == -1) |
653 | return PID_CHARS_DEFAULT; | |
654 | ||
655 | return strnlen(taskmax, sizeof(taskmax)); | |
656 | } | |
657 | ||
c672220f | 658 | /* |
7ff1f63f | 659 | * Reads messages from regular file by mmap |
c672220f | 660 | */ |
7ff1f63f | 661 | static ssize_t mmap_file_buffer(struct dmesg_control *ctl, char **buf) |
c672220f KZ |
662 | { |
663 | struct stat st; | |
9b3a6984 | 664 | int fd; |
c672220f | 665 | |
9b3a6984 KZ |
666 | if (!ctl->filename) |
667 | return -1; | |
668 | ||
669 | fd = open(ctl->filename, O_RDONLY); | |
c672220f | 670 | if (fd < 0) |
9b3a6984 | 671 | err(EXIT_FAILURE, _("cannot open %s"), ctl->filename); |
c672220f | 672 | if (fstat(fd, &st)) |
fc14ceba | 673 | err(EXIT_FAILURE, _("stat of %s failed"), ctl->filename); |
c672220f KZ |
674 | |
675 | *buf = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0); | |
676 | if (*buf == MAP_FAILED) | |
9b3a6984 | 677 | err(EXIT_FAILURE, _("cannot mmap: %s"), ctl->filename); |
c672220f KZ |
678 | ctl->mmap_buff = *buf; |
679 | ctl->pagesize = getpagesize(); | |
680 | close(fd); | |
681 | ||
682 | return st.st_size; | |
683 | } | |
684 | ||
5ef05369 | 685 | /* |
7ff1f63f | 686 | * Reads messages from kernel ring buffer by klogctl() |
5ef05369 | 687 | */ |
7ff1f63f | 688 | static ssize_t read_syslog_buffer(struct dmesg_control *ctl, char **buf) |
65e3eed9 KZ |
689 | { |
690 | size_t sz; | |
691 | int rc = -1; | |
65e3eed9 | 692 | |
e6471b9f KZ |
693 | if (ctl->bufsize) { |
694 | sz = ctl->bufsize + 8; | |
65e3eed9 | 695 | *buf = xmalloc(sz * sizeof(char)); |
50cc6332 | 696 | rc = klogctl(SYSLOG_ACTION_READ_ALL, *buf, sz); |
65e3eed9 KZ |
697 | } else { |
698 | sz = 16392; | |
699 | while (1) { | |
700 | *buf = xmalloc(sz * sizeof(char)); | |
701 | rc = klogctl(SYSLOG_ACTION_READ_ALL, *buf, sz); | |
738767b9 KZ |
702 | if (rc < 0) |
703 | break; | |
704 | if ((size_t) rc != sz || sz > (1 << 28)) | |
65e3eed9 KZ |
705 | break; |
706 | free(*buf); | |
707 | *buf = NULL; | |
708 | sz *= 4; | |
709 | } | |
65e3eed9 KZ |
710 | } |
711 | ||
712 | return rc; | |
713 | } | |
714 | ||
7ff1f63f | 715 | /* |
d8253226 | 716 | * Top level function to read (and print in case of kmesg) messages |
7ff1f63f | 717 | */ |
d8253226 | 718 | static ssize_t process_buffer(struct dmesg_control *ctl, char **buf) |
e6471b9f KZ |
719 | { |
720 | ssize_t n = -1; | |
721 | ||
722 | switch (ctl->method) { | |
723 | case DMESG_METHOD_MMAP: | |
7ff1f63f | 724 | n = mmap_file_buffer(ctl, buf); |
e6471b9f KZ |
725 | break; |
726 | case DMESG_METHOD_SYSLOG: | |
727 | if (!ctl->bufsize) | |
7ff1f63f | 728 | ctl->bufsize = get_syslog_buffer_size(); |
e6471b9f | 729 | |
7ff1f63f | 730 | n = read_syslog_buffer(ctl, buf); |
467a5b31 EC |
731 | /* Set number of PID characters for caller_id spacing */ |
732 | ctl->caller_id_size = SYSLOG_DEFAULT_CALLER_ID_CHARS; | |
e6471b9f | 733 | break; |
ddca870a | 734 | case DMESG_METHOD_KMSG: |
01c54718 TW |
735 | if (ctl->filename) |
736 | n = process_kmsg_file(ctl, buf); | |
737 | else | |
738 | /* | |
739 | * Since kernel 3.5.0 | |
740 | */ | |
741 | n = process_kmsg(ctl); | |
ddca870a | 742 | break; |
f6f1356f SK |
743 | default: |
744 | abort(); /* impossible method -> drop core */ | |
e6471b9f KZ |
745 | } |
746 | ||
747 | return n; | |
748 | } | |
749 | ||
b8300c0a KZ |
750 | static int fwrite_hex(const char *buf, size_t size, FILE *out) |
751 | { | |
738767b9 | 752 | size_t i; |
b8300c0a KZ |
753 | |
754 | for (i = 0; i < size; i++) { | |
2e45524d | 755 | int rc = fprintf(out, "\\x%02hhx", buf[i]); |
b8300c0a KZ |
756 | if (rc < 0) |
757 | return rc; | |
758 | } | |
759 | return 0; | |
760 | } | |
761 | ||
5ef05369 KZ |
762 | /* |
763 | * Prints to 'out' and non-printable chars are replaced with \x<hex> sequences. | |
764 | */ | |
646bba41 | 765 | static void safe_fwrite(struct dmesg_control *ctl, const char *buf, size_t size, int indent, FILE *out) |
b8300c0a | 766 | { |
738767b9 | 767 | size_t i; |
b8300c0a KZ |
768 | #ifdef HAVE_WIDECHAR |
769 | mbstate_t s; | |
fd7b0b4e | 770 | wchar_t wc; |
b8300c0a KZ |
771 | memset(&s, 0, sizeof (s)); |
772 | #endif | |
773 | for (i = 0; i < size; i++) { | |
774 | const char *p = buf + i; | |
775 | int rc, hex = 0; | |
646bba41 | 776 | size_t len = 1; |
b8300c0a | 777 | |
646bba41 | 778 | if (!ctl->noesc) { |
fd7b0b4e KZ |
779 | if (*p == '\0') { |
780 | hex = 1; | |
781 | goto doprint; | |
782 | } | |
b8300c0a | 783 | #ifdef HAVE_WIDECHAR |
646bba41 KZ |
784 | len = mbrtowc(&wc, p, size - i, &s); |
785 | ||
786 | if (len == 0) /* L'\0' */ | |
787 | return; | |
788 | ||
789 | if (len == (size_t)-1 || len == (size_t)-2) { /* invalid sequence */ | |
790 | memset(&s, 0, sizeof (s)); | |
791 | len = hex = 1; | |
792 | i += len - 1; | |
793 | } else if (len > 1) { | |
794 | if (!iswprint(wc) && !iswspace(wc)) /* non-printable multibyte */ | |
795 | hex = 1; | |
796 | i += len - 1; | |
797 | } else | |
0720766e | 798 | #endif |
646bba41 KZ |
799 | { |
800 | len = 1; | |
801 | if (!isprint((unsigned char) *p) && | |
802 | !isspace((unsigned char) *p)) /* non-printable */ | |
803 | hex = 1; | |
804 | } | |
3661aab4 KZ |
805 | } |
806 | ||
fd7b0b4e | 807 | doprint: |
b8300c0a KZ |
808 | if (hex) |
809 | rc = fwrite_hex(p, len, out); | |
b45c3da2 | 810 | else if (*p == '\n' && *(p + 1) && indent) { |
f1300e2c SK |
811 | rc = fwrite(p, 1, len, out) != len; |
812 | if (fprintf(out, "%*s", indent, "") != indent) | |
813 | rc |= 1; | |
3661aab4 | 814 | } else |
85f3cc55 | 815 | rc = fwrite(p, 1, len, out) != len; |
3661aab4 | 816 | |
97c32789 KZ |
817 | if (rc != 0) { |
818 | if (errno != EPIPE) | |
819 | err(EXIT_FAILURE, _("write failed")); | |
820 | exit(EXIT_SUCCESS); | |
821 | } | |
b8300c0a KZ |
822 | } |
823 | } | |
824 | ||
ddca870a KZ |
825 | static const char *skip_item(const char *begin, const char *end, const char *sep) |
826 | { | |
827 | while (begin < end) { | |
828 | int c = *begin++; | |
829 | ||
830 | if (c == '\0' || strchr(sep, c)) | |
831 | break; | |
832 | } | |
833 | ||
834 | return begin; | |
835 | } | |
836 | ||
467a5b31 EC |
837 | /* |
838 | * Checks to see if the caller (caller id) field is present in the kmsg record. | |
839 | * This is true if the PRINTK_CALLER config option has been set in the kernel. | |
840 | * | |
841 | * If the caller_id is found in the kmsg buffer then return the id and id type | |
842 | * to the caller in dmesg caller_id. Returns string pointer to next value. | |
843 | * | |
844 | */ | |
845 | static const char *parse_callerid(const char *p_str, const char *end, | |
846 | struct dmesg_record *p_drec) | |
847 | { | |
848 | const char *p_after; | |
849 | const char *p_next; | |
850 | size_t cid_size; | |
851 | char *p_scn; | |
852 | char *p_cid; | |
853 | ||
854 | /* Check for PRINTK_CALLER prefix, must be before msg text */ | |
855 | p_cid = strstr(p_str, DMESG_CALLER_PREFIX); | |
856 | p_scn = strchr(p_str, ';'); | |
857 | if (p_cid != NULL && p_drec != NULL && p_scn != NULL && p_cid < p_scn) { | |
858 | p_next = p_cid + DMESG_CALLER_PREFIXSZ; | |
859 | p_after = skip_item(p_next, end, ",;"); | |
860 | cid_size = p_after - p_next; | |
861 | if (cid_size < sizeof(p_drec->caller_id)) | |
862 | xstrncpy(p_drec->caller_id, p_next, cid_size); | |
863 | else | |
864 | return p_str; | |
865 | return p_after; | |
866 | } | |
867 | return p_str; | |
868 | } | |
869 | ||
60464b1f KZ |
870 | /* |
871 | * Parses one record from syslog(2) buffer | |
872 | */ | |
7af23060 KZ |
873 | static int get_next_syslog_record(struct dmesg_control *ctl, |
874 | struct dmesg_record *rec) | |
f4fa5b44 | 875 | { |
738767b9 | 876 | size_t i; |
b8300c0a KZ |
877 | const char *begin = NULL; |
878 | ||
7af23060 KZ |
879 | if (ctl->method != DMESG_METHOD_MMAP && |
880 | ctl->method != DMESG_METHOD_SYSLOG) | |
881 | return -1; | |
882 | ||
a7ee94f2 KZ |
883 | if (!rec->next || !rec->next_size) |
884 | return 1; | |
f4fa5b44 | 885 | |
ddca870a | 886 | INIT_DMESG_RECORD(rec); |
a7ee94f2 | 887 | |
c672220f KZ |
888 | /* |
889 | * Unmap already printed file data from memory | |
890 | */ | |
891 | if (ctl->mmap_buff && (size_t) (rec->next - ctl->mmap_buff) > ctl->pagesize) { | |
892 | void *x = ctl->mmap_buff; | |
893 | ||
894 | ctl->mmap_buff += ctl->pagesize; | |
895 | munmap(x, ctl->pagesize); | |
896 | } | |
897 | ||
a7ee94f2 KZ |
898 | for (i = 0; i < rec->next_size; i++) { |
899 | const char *p = rec->next + i; | |
900 | const char *end = NULL; | |
b8300c0a KZ |
901 | |
902 | if (!begin) | |
903 | begin = p; | |
a7ee94f2 | 904 | if (i + 1 == rec->next_size) { |
b8300c0a | 905 | end = p + 1; |
f4fa5b44 | 906 | i++; |
22f69825 KZ |
907 | } else if (*p == '\n' && *(p + 1) == '<') |
908 | end = p; | |
909 | ||
a7ee94f2 KZ |
910 | if (begin && !*begin) |
911 | begin = NULL; /* zero(s) at the end of the buffer? */ | |
b8300c0a KZ |
912 | if (!begin || !end) |
913 | continue; | |
914 | if (end <= begin) | |
915 | continue; /* error or empty line? */ | |
916 | ||
636a6207 | 917 | if (*begin == '<') { |
506b5451 | 918 | if (ctl->fltr_lev || ctl->fltr_fac || ctl->decode || ctl->color || ctl->json) |
a7ee94f2 KZ |
919 | begin = parse_faclev(begin + 1, &rec->facility, |
920 | &rec->level); | |
ddca870a KZ |
921 | else |
922 | begin = skip_item(begin, end, ">"); | |
b8300c0a KZ |
923 | } |
924 | ||
bd304d92 KZ |
925 | if (*begin == '[' && (*(begin + 1) == ' ' || |
926 | isdigit(*(begin + 1)))) { | |
776eabe7 | 927 | |
3de2e556 | 928 | if (!is_time_fmt_set(ctl, DMESG_TIMEFTM_NONE)) |
ddca870a | 929 | begin = parse_syslog_timestamp(begin + 1, &rec->tv); |
776eabe7 | 930 | else |
ddca870a KZ |
931 | begin = skip_item(begin, end, "]"); |
932 | ||
31c9099a KZ |
933 | if (begin < end && *begin == ' ') |
934 | begin++; | |
a7ee94f2 | 935 | } |
d74b8dfc | 936 | |
467a5b31 EC |
937 | if (*begin == '[' && (*(begin + 1) == ' ' || |
938 | (*(begin + 1) == 'T' || *(begin + 1) == 'C'))) { | |
939 | const char *start = begin + 1; | |
940 | size_t id_size; | |
941 | ||
942 | start = start + strspn(start, " "); | |
943 | begin = skip_item(begin, end, "]"); | |
944 | id_size = begin - start; | |
945 | if (id_size < sizeof(rec->caller_id)) | |
946 | xstrncpy(rec->caller_id, start, id_size); | |
947 | rec->mesg = begin + 1; | |
948 | rec->mesg_size = end - begin - 1; | |
949 | } else { | |
950 | rec->mesg = begin; | |
951 | rec->mesg_size = end - begin; | |
952 | } | |
b8300c0a | 953 | |
5f538ac4 PB |
954 | /* Don't count \n from the last message to the message size */ |
955 | if (*end != '\n' && *(end - 1) == '\n') | |
956 | rec->mesg_size--; | |
957 | ||
a7ee94f2 KZ |
958 | rec->next_size -= end - rec->next; |
959 | rec->next = rec->next_size > 0 ? end + 1 : NULL; | |
59202950 PU |
960 | if (rec->next_size > 0) |
961 | rec->next_size--; | |
a7ee94f2 KZ |
962 | |
963 | return 0; | |
964 | } | |
965 | ||
966 | return 1; | |
967 | } | |
968 | ||
d1e5764c | 969 | static usec_t record_time(struct dmesg_control *ctl, struct dmesg_record *rec) |
732d7594 | 970 | { |
d1e5764c TW |
971 | return timeval_to_usec(&ctl->boot_time) + |
972 | ctl->suspended_time + | |
973 | timeval_to_usec(&rec->tv); | |
732d7594 KZ |
974 | } |
975 | ||
a7ee94f2 KZ |
976 | static int accept_record(struct dmesg_control *ctl, struct dmesg_record *rec) |
977 | { | |
978 | if (ctl->fltr_lev && (rec->facility < 0 || | |
979 | !isset(ctl->levels, rec->level))) | |
980 | return 0; | |
981 | ||
982 | if (ctl->fltr_fac && (rec->facility < 0 || | |
983 | !isset(ctl->facilities, rec->facility))) | |
984 | return 0; | |
985 | ||
732d7594 KZ |
986 | if (ctl->since && ctl->since >= record_time(ctl, rec)) |
987 | return 0; | |
988 | ||
989 | if (ctl->until && ctl->until <= record_time(ctl, rec)) | |
990 | return 0; | |
991 | ||
a7ee94f2 KZ |
992 | return 1; |
993 | } | |
994 | ||
7ff1f63f | 995 | static void raw_print(struct dmesg_control *ctl, const char *buf, size_t size) |
c672220f KZ |
996 | { |
997 | int lastc = '\n'; | |
998 | ||
999 | if (!ctl->mmap_buff) { | |
1000 | /* | |
1001 | * Print whole ring buffer | |
1002 | */ | |
646bba41 | 1003 | safe_fwrite(ctl, buf, size, 0, stdout); |
c672220f KZ |
1004 | lastc = buf[size - 1]; |
1005 | } else { | |
1006 | /* | |
1007 | * Print file in small chunks to save memory | |
1008 | */ | |
1009 | while (size) { | |
1010 | size_t sz = size > ctl->pagesize ? ctl->pagesize : size; | |
1011 | char *x = ctl->mmap_buff; | |
1012 | ||
646bba41 | 1013 | safe_fwrite(ctl, x, sz, 0, stdout); |
c672220f KZ |
1014 | lastc = x[sz - 1]; |
1015 | size -= sz; | |
1016 | ctl->mmap_buff += sz; | |
1017 | munmap(x, sz); | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | if (lastc != '\n') | |
1022 | putchar('\n'); | |
1023 | } | |
1024 | ||
60464b1f KZ |
1025 | static struct tm *record_localtime(struct dmesg_control *ctl, |
1026 | struct dmesg_record *rec, | |
1027 | struct tm *tm) | |
1028 | { | |
d1e5764c | 1029 | time_t t = record_time(ctl, rec) / USEC_PER_SEC; |
60464b1f KZ |
1030 | return localtime_r(&t, tm); |
1031 | } | |
1032 | ||
0d1b3300 KZ |
1033 | static char *record_ctime(struct dmesg_control *ctl, |
1034 | struct dmesg_record *rec, | |
1035 | char *buf, size_t bufsiz) | |
1036 | { | |
60464b1f | 1037 | struct tm tm; |
0d1b3300 | 1038 | |
60464b1f | 1039 | record_localtime(ctl, rec, &tm); |
0d1b3300 | 1040 | |
f45c8180 KZ |
1041 | /* TRANSLATORS: dmesg uses strftime() fo generate date-time string |
1042 | where %a is abbreviated name of the day, %b is abbreviated month | |
1043 | name and %e is day of the month as a decimal number. Please, set | |
1044 | proper month/day order here */ | |
1045 | if (strftime(buf, bufsiz, _("%a %b %e %H:%M:%S %Y"), &tm) == 0) | |
0d1b3300 KZ |
1046 | *buf = '\0'; |
1047 | return buf; | |
1048 | } | |
1049 | ||
60464b1f KZ |
1050 | static char *short_ctime(struct tm *tm, char *buf, size_t bufsiz) |
1051 | { | |
f45c8180 KZ |
1052 | /* TRANSLATORS: dmesg uses strftime() fo generate date-time string |
1053 | where: %b is abbreviated month and %e is day of the month as a | |
1054 | decimal number. Please, set proper month/day order here. */ | |
1055 | if (strftime(buf, bufsiz, _("%b%e %H:%M"), tm) == 0) | |
60464b1f KZ |
1056 | *buf = '\0'; |
1057 | return buf; | |
1058 | } | |
1059 | ||
8a8be309 | 1060 | static char *iso_8601_time(struct dmesg_control *ctl, struct dmesg_record *rec, |
3c6e7c54 | 1061 | char *buf, size_t bufsz) |
8a8be309 | 1062 | { |
8949ec93 TW |
1063 | struct timeval tv = usec_to_timeval( |
1064 | timeval_to_usec(&ctl->boot_time) + ctl->suspended_time + | |
1065 | timeval_to_usec(&rec->tv) | |
1066 | ); | |
3c6e7c54 | 1067 | |
4111bb3a | 1068 | if (strtimeval_iso(&tv, ISO_TIMESTAMP_COMMA_T, buf, bufsz) != 0) |
3c6e7c54 KZ |
1069 | return NULL; |
1070 | ||
8a8be309 SK |
1071 | return buf; |
1072 | } | |
1073 | ||
60464b1f KZ |
1074 | static double record_count_delta(struct dmesg_control *ctl, |
1075 | struct dmesg_record *rec) | |
1076 | { | |
1077 | double delta = 0; | |
1078 | ||
1079 | if (timerisset(&ctl->lasttime)) | |
1080 | delta = time_diff(&rec->tv, &ctl->lasttime); | |
1081 | ||
1082 | ctl->lasttime = rec->tv; | |
1083 | return delta; | |
1084 | } | |
1085 | ||
5aaee63c KZ |
1086 | static const char *get_subsys_delimiter(const char *mesg, size_t mesg_size) |
1087 | { | |
1088 | const char *p = mesg; | |
1089 | size_t sz = mesg_size; | |
1090 | ||
1091 | while (sz > 0) { | |
1092 | const char *d = strnchr(p, sz, ':'); | |
1093 | if (!d) | |
1094 | return NULL; | |
fcd90d9a | 1095 | sz -= d - p + 1; |
5aaee63c | 1096 | if (sz) { |
5fd8d655 CD |
1097 | if (sz >= 2 && isblank(*(d + 1))) |
1098 | return d + 2; | |
5aaee63c KZ |
1099 | p = d + 1; |
1100 | } | |
1101 | } | |
1102 | return NULL; | |
1103 | } | |
1104 | ||
506b5451 KZ |
1105 | #define is_facpri_valid(_r) \ |
1106 | (((_r)->level > -1) && ((_r)->level < (int) ARRAY_SIZE(level_names)) && \ | |
1107 | ((_r)->facility > -1) && \ | |
1108 | ((_r)->facility < (int) ARRAY_SIZE(facility_names))) | |
1109 | ||
1110 | ||
60464b1f KZ |
1111 | static void print_record(struct dmesg_control *ctl, |
1112 | struct dmesg_record *rec) | |
7af23060 | 1113 | { |
5f538ac4 PB |
1114 | char buf[128]; |
1115 | char fpbuf[32] = "\0"; | |
1116 | char tsbuf[64] = "\0"; | |
423ed6e6 | 1117 | char full_tsbuf[64 * __DMESG_TIMEFTM_COUNT] = "\0"; |
aec01d72 | 1118 | size_t mesg_size = rec->mesg_size; |
5f538ac4 PB |
1119 | int timebreak = 0; |
1120 | char *mesg_copy = NULL; | |
1121 | const char *line = NULL; | |
423ed6e6 | 1122 | double delta = 0; |
3de2e556 | 1123 | size_t format_iter = 0; |
7af23060 KZ |
1124 | |
1125 | if (!accept_record(ctl, rec)) | |
1126 | return; | |
1127 | ||
1128 | if (!rec->mesg_size) { | |
506b5451 KZ |
1129 | if (!ctl->json) |
1130 | putchar('\n'); | |
7af23060 KZ |
1131 | return; |
1132 | } | |
1133 | ||
423ed6e6 KZ |
1134 | delta = record_count_delta(ctl, rec); |
1135 | ||
506b5451 KZ |
1136 | if (ctl->json) { |
1137 | if (!ul_jsonwrt_is_ready(&ctl->jfmt)) { | |
1138 | ul_jsonwrt_init(&ctl->jfmt, stdout, 0); | |
1139 | ul_jsonwrt_root_open(&ctl->jfmt); | |
1140 | ul_jsonwrt_array_open(&ctl->jfmt, "dmesg"); | |
1141 | } | |
1142 | ul_jsonwrt_object_open(&ctl->jfmt, NULL); | |
1143 | } | |
1144 | ||
0d1b3300 | 1145 | /* |
5f538ac4 | 1146 | * Compose syslog(2) compatible raw output -- used for /dev/kmsg for |
0d1b3300 KZ |
1147 | * backward compatibility with syslog(2) buffers only |
1148 | */ | |
37b04d6c | 1149 | if (ctl->raw) { |
3de2e556 | 1150 | ctl->indent = snprintf(full_tsbuf, sizeof(full_tsbuf), |
5f538ac4 | 1151 | "<%d>[%5ld.%06ld] ", |
fa6ac102 | 1152 | LOG_RAW_FAC_PRI(rec->facility, rec->level), |
5f538ac4 PB |
1153 | (long) rec->tv.tv_sec, |
1154 | (long) rec->tv.tv_usec); | |
6963338c | 1155 | goto full_output; |
37b04d6c KZ |
1156 | } |
1157 | ||
5f538ac4 | 1158 | /* Store decode information (facility & priority level) in a buffer */ |
506b5451 | 1159 | if (!ctl->json && ctl->decode && is_facpri_valid(rec)) |
5f538ac4 PB |
1160 | snprintf(fpbuf, sizeof(fpbuf), "%-6s:%-6s: ", |
1161 | facility_names[rec->facility].name, | |
1162 | level_names[rec->level].name); | |
1163 | ||
1164 | /* Store the timestamp in a buffer */ | |
423ed6e6 KZ |
1165 | for (format_iter = 0; |
1166 | format_iter < (ctl->ntime_fmts > 0 ? ctl->ntime_fmts : 1); | |
1167 | format_iter++) { | |
3de2e556 RT |
1168 | switch (ctl->time_fmts[format_iter]) { |
1169 | struct tm cur; | |
1170 | case DMESG_TIMEFTM_NONE: | |
1171 | ctl->indent = 0; | |
1172 | break; | |
1173 | case DMESG_TIMEFTM_CTIME: | |
5f538ac4 | 1174 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), "[%s] ", |
3de2e556 RT |
1175 | record_ctime(ctl, rec, buf, sizeof(buf))); |
1176 | break; | |
1177 | case DMESG_TIMEFTM_CTIME_DELTA: | |
1178 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), "[%s <%12.06f>] ", | |
1179 | record_ctime(ctl, rec, buf, sizeof(buf)), | |
1180 | delta); | |
1181 | break; | |
1182 | case DMESG_TIMEFTM_DELTA: | |
1183 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), "[<%12.06f>] ", | |
1184 | delta); | |
1185 | break; | |
1186 | case DMESG_TIMEFTM_RELTIME: | |
1187 | record_localtime(ctl, rec, &cur); | |
1188 | if (cur.tm_min != ctl->lasttm.tm_min || | |
1189 | cur.tm_hour != ctl->lasttm.tm_hour || | |
1190 | cur.tm_yday != ctl->lasttm.tm_yday) { | |
1191 | timebreak = 1; | |
1192 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), "[%s] ", | |
1193 | short_ctime(&cur, buf, | |
1194 | sizeof(buf))); | |
1195 | } else { | |
1196 | if (delta < 10) | |
1197 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), | |
1198 | "[ %+8.06f] ", delta); | |
1199 | else | |
1200 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), | |
1201 | "[ %+9.06f] ", delta); | |
1202 | } | |
1203 | ctl->lasttm = cur; | |
1204 | break; | |
1205 | case DMESG_TIMEFTM_TIME: | |
1206 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), | |
1207 | ctl->json ? "%5ld.%06ld" : "[%5ld.%06ld] ", | |
1208 | (long)rec->tv.tv_sec, | |
1209 | (long)rec->tv.tv_usec); | |
1210 | break; | |
1211 | case DMESG_TIMEFTM_TIME_DELTA: | |
1212 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), "[%5ld.%06ld <%12.06f>] ", | |
1213 | (long)rec->tv.tv_sec, | |
1214 | (long)rec->tv.tv_usec, | |
1215 | delta); | |
1216 | break; | |
1217 | case DMESG_TIMEFTM_ISO8601: | |
1218 | ctl->indent = snprintf(tsbuf, sizeof(tsbuf), "%s ", | |
1219 | iso_8601_time(ctl, rec, buf, | |
1220 | sizeof(buf))); | |
1221 | break; | |
1222 | default: | |
1223 | abort(); | |
5aaee63c | 1224 | } |
3de2e556 RT |
1225 | |
1226 | if (is_time_fmt_set(ctl, DMESG_TIMEFTM_NONE)) | |
1227 | break; | |
1228 | else if (*tsbuf) | |
1229 | strcat(full_tsbuf, tsbuf); | |
1230 | ||
60464b1f | 1231 | } |
7af23060 | 1232 | |
5f538ac4 PB |
1233 | ctl->indent += strlen(fpbuf); |
1234 | ||
1235 | full_output: | |
1236 | /* Output the decode information */ | |
506b5451 | 1237 | if (*fpbuf) { |
5f538ac4 | 1238 | fputs(fpbuf, stdout); |
506b5451 KZ |
1239 | } else if (ctl->json && is_facpri_valid(rec)) { |
1240 | if (ctl->decode) { | |
1241 | ul_jsonwrt_value_s(&ctl->jfmt, "fac", facility_names[rec->facility].name); | |
1242 | ul_jsonwrt_value_s(&ctl->jfmt, "pri", level_names[rec->level].name); | |
1243 | } else | |
fa6ac102 | 1244 | ul_jsonwrt_value_u64(&ctl->jfmt, "pri", LOG_RAW_FAC_PRI(rec->facility, rec->level)); |
506b5451 | 1245 | } |
5f538ac4 PB |
1246 | |
1247 | /* Output the timestamp buffer */ | |
3de2e556 | 1248 | if (*full_tsbuf) { |
5f538ac4 PB |
1249 | /* Colorize the timestamp */ |
1250 | if (ctl->color) | |
1251 | dmesg_enable_color(timebreak ? DMESG_COLOR_TIMEBREAK : | |
1252 | DMESG_COLOR_TIME); | |
3de2e556 | 1253 | if (!is_time_fmt_set(ctl, DMESG_TIMEFTM_RELTIME)) { |
506b5451 | 1254 | if (ctl->json) |
3de2e556 | 1255 | ul_jsonwrt_value_raw(&ctl->jfmt, "time", full_tsbuf); |
506b5451 | 1256 | else |
3de2e556 | 1257 | fputs(full_tsbuf, stdout); |
5f538ac4 PB |
1258 | } else { |
1259 | /* | |
1260 | * For relative timestamping, the first line's | |
1261 | * timestamp is the offset and all other lines will | |
1262 | * report an offset of 0.000000. | |
1263 | */ | |
3de2e556 | 1264 | fputs(!line ? full_tsbuf : "[ +0.000000] ", stdout); |
5f538ac4 PB |
1265 | } |
1266 | if (ctl->color) | |
1267 | color_disable(); | |
1268 | } | |
ddca870a | 1269 | |
467a5b31 EC |
1270 | if (*rec->caller_id) { |
1271 | if (ctl->json) { | |
1272 | ul_jsonwrt_value_s(&ctl->jfmt, "caller", rec->caller_id); | |
1273 | } else { | |
1274 | char cidbuf[PID_CHARS_MAX+3] = {'\0'}; | |
1275 | ||
1276 | sprintf(cidbuf, "[%*s] ", | |
1277 | (char)ctl->caller_id_size, rec->caller_id); | |
1278 | ctl->indent += strnlen(cidbuf, sizeof(cidbuf)); | |
1279 | fputs(cidbuf, stdout); | |
1280 | } | |
1281 | } | |
1282 | ||
5f538ac4 PB |
1283 | /* |
1284 | * A kernel message may contain several lines of output, separated | |
1285 | * by '\n'. If the timestamp and decode outputs are forced then each | |
1286 | * line of the message must be displayed with that information. | |
1287 | */ | |
1288 | if (ctl->force_prefix) { | |
1289 | if (!line) { | |
dd83526a | 1290 | mesg_copy = xstrdup(rec->mesg); |
5f538ac4 | 1291 | line = strtok(mesg_copy, "\n"); |
2d278988 KZ |
1292 | if (!line) |
1293 | goto done; /* only when something is wrong */ | |
5f538ac4 PB |
1294 | mesg_size = strlen(line); |
1295 | } | |
1296 | } else { | |
1297 | line = rec->mesg; | |
1298 | mesg_size = rec->mesg_size; | |
1299 | } | |
5aaee63c | 1300 | |
5f538ac4 | 1301 | /* Colorize kernel message output */ |
5aaee63c | 1302 | if (ctl->color) { |
5f538ac4 PB |
1303 | /* Subsystem prefix */ |
1304 | const char *subsys = get_subsys_delimiter(line, mesg_size); | |
1305 | int has_color = 0; | |
1306 | ||
5aaee63c | 1307 | if (subsys) { |
f4bc7f96 | 1308 | dmesg_enable_color(DMESG_COLOR_SUBSYS); |
646bba41 | 1309 | safe_fwrite(ctl, line, subsys - line, ctl->indent, stdout); |
5aaee63c KZ |
1310 | color_disable(); |
1311 | ||
5f538ac4 PB |
1312 | mesg_size -= subsys - line; |
1313 | line = subsys; | |
5aaee63c | 1314 | } |
5f538ac4 PB |
1315 | /* Error, alert .. etc. colors */ |
1316 | has_color = set_level_color(rec->level, line, mesg_size) == 0; | |
646bba41 | 1317 | safe_fwrite(ctl, line, mesg_size, ctl->indent, stdout); |
5aaee63c KZ |
1318 | if (has_color) |
1319 | color_disable(); | |
506b5451 KZ |
1320 | } else { |
1321 | if (ctl->json) | |
159ea147 | 1322 | ul_jsonwrt_value_s_sized(&ctl->jfmt, "msg", line, mesg_size); |
506b5451 KZ |
1323 | else |
1324 | safe_fwrite(ctl, line, mesg_size, ctl->indent, stdout); | |
1325 | } | |
5f538ac4 PB |
1326 | |
1327 | /* Get the next line */ | |
1328 | if (ctl->force_prefix) { | |
1329 | line = strtok(NULL, "\n"); | |
1330 | if (line && *line) { | |
1331 | putchar('\n'); | |
1332 | mesg_size = strlen(line); | |
1333 | goto full_output; | |
1334 | } | |
5f538ac4 | 1335 | } |
098ce273 | 1336 | |
2d278988 | 1337 | done: |
fb9ed3b4 | 1338 | free(mesg_copy); |
506b5451 KZ |
1339 | if (ctl->json) |
1340 | ul_jsonwrt_object_close(&ctl->jfmt); | |
1341 | else | |
1342 | putchar('\n'); | |
7af23060 KZ |
1343 | } |
1344 | ||
a7ee94f2 KZ |
1345 | /* |
1346 | * Prints the 'buf' kernel ring buffer; the messages are filtered out according | |
1347 | * to 'levels' and 'facilities' bitarrays. | |
1348 | */ | |
7ff1f63f KZ |
1349 | static void print_buffer(struct dmesg_control *ctl, |
1350 | const char *buf, size_t size) | |
a7ee94f2 KZ |
1351 | { |
1352 | struct dmesg_record rec = { .next = buf, .next_size = size }; | |
1353 | ||
1354 | if (ctl->raw) { | |
7ff1f63f | 1355 | raw_print(ctl, buf, size); |
a7ee94f2 KZ |
1356 | return; |
1357 | } | |
1358 | ||
7af23060 KZ |
1359 | while (get_next_syslog_record(ctl, &rec) == 0) |
1360 | print_record(ctl, &rec); | |
1361 | } | |
a7ee94f2 | 1362 | |
4ceb601d MB |
1363 | static ssize_t read_kmsg_one(struct dmesg_control *ctl) |
1364 | { | |
1365 | ssize_t size; | |
1366 | ||
8a6f0cfd | 1367 | /* kmsg returns EPIPE if record was modified while reading */ |
4ceb601d | 1368 | do { |
8a6f0cfd KZ |
1369 | size = read(ctl->kmsg, ctl->kmsg_buf, |
1370 | sizeof(ctl->kmsg_buf) - 1); | |
1371 | } while (size < 0 && errno == EPIPE); | |
4ceb601d MB |
1372 | |
1373 | return size; | |
1374 | } | |
1375 | ||
7af23060 KZ |
1376 | static int init_kmsg(struct dmesg_control *ctl) |
1377 | { | |
0fd12a96 KZ |
1378 | int mode = O_RDONLY; |
1379 | ||
1380 | if (!ctl->follow) | |
1381 | mode |= O_NONBLOCK; | |
3938c08c KZ |
1382 | else |
1383 | setlinebuf(stdout); | |
0fd12a96 KZ |
1384 | |
1385 | ctl->kmsg = open("/dev/kmsg", mode); | |
c677ffba KZ |
1386 | if (ctl->kmsg < 0) |
1387 | return -1; | |
1388 | ||
1389 | /* | |
1390 | * Seek after the last record available at the time | |
1391 | * the last SYSLOG_ACTION_CLEAR was issued. | |
1392 | * | |
1393 | * ... otherwise SYSLOG_ACTION_CLEAR will have no effect for kmsg. | |
1394 | */ | |
d7881b0e | 1395 | lseek(ctl->kmsg, 0, ctl->end ? SEEK_END : SEEK_DATA); |
298a073c KZ |
1396 | |
1397 | /* | |
29e204d1 KZ |
1398 | * Old kernels (<3.5) can successfully open /dev/kmsg for read-only, |
1399 | * but read() returns -EINVAL :-((( | |
298a073c KZ |
1400 | * |
1401 | * Let's try to read the first record. The record is later processed in | |
d8253226 | 1402 | * process_kmsg(). |
298a073c | 1403 | */ |
4ceb601d | 1404 | ctl->kmsg_first_read = read_kmsg_one(ctl); |
298a073c KZ |
1405 | if (ctl->kmsg_first_read < 0) { |
1406 | close(ctl->kmsg); | |
1407 | ctl->kmsg = -1; | |
1408 | return -1; | |
1409 | } | |
1410 | ||
c677ffba | 1411 | return 0; |
f4fa5b44 KZ |
1412 | } |
1413 | ||
ddca870a KZ |
1414 | /* |
1415 | * /dev/kmsg record format: | |
1416 | * | |
9e930041 | 1417 | * faclev,seqnum,timestamp[optional, ...];message\n |
ddca870a KZ |
1418 | * TAGNAME=value |
1419 | * ... | |
1420 | * | |
1421 | * - fields are separated by ',' | |
1422 | * - last field is terminated by ';' | |
1423 | * | |
1424 | */ | |
1425 | #define LAST_KMSG_FIELD(s) (!s || !*s || *(s - 1) == ';') | |
1426 | ||
1427 | static int parse_kmsg_record(struct dmesg_control *ctl, | |
1428 | struct dmesg_record *rec, | |
1429 | char *buf, | |
1430 | size_t sz) | |
1431 | { | |
1432 | const char *p = buf, *end; | |
1433 | ||
1434 | if (sz == 0 || !buf || !*buf) | |
1435 | return -1; | |
1436 | ||
1437 | end = buf + (sz - 1); | |
1438 | INIT_DMESG_RECORD(rec); | |
1439 | ||
1440 | while (p < end && isspace(*p)) | |
1441 | p++; | |
1442 | ||
1443 | /* A) priority and facility */ | |
098ce273 | 1444 | if (ctl->fltr_lev || ctl->fltr_fac || ctl->decode || |
506b5451 | 1445 | ctl->raw || ctl->color || ctl->json) |
ddca870a KZ |
1446 | p = parse_faclev(p, &rec->facility, &rec->level); |
1447 | else | |
1448 | p = skip_item(p, end, ","); | |
1449 | if (LAST_KMSG_FIELD(p)) | |
1450 | goto mesg; | |
1451 | ||
1452 | /* B) sequence number */ | |
1453 | p = skip_item(p, end, ",;"); | |
1454 | if (LAST_KMSG_FIELD(p)) | |
1455 | goto mesg; | |
1456 | ||
1457 | /* C) timestamp */ | |
3de2e556 | 1458 | if (is_time_fmt_set(ctl, DMESG_TIMEFTM_NONE)) |
ddca870a KZ |
1459 | p = skip_item(p, end, ",;"); |
1460 | else | |
1461 | p = parse_kmsg_timestamp(p, &rec->tv); | |
1462 | if (LAST_KMSG_FIELD(p)) | |
1463 | goto mesg; | |
1464 | ||
8a6f0cfd | 1465 | /* D) optional fields (ignore) */ |
467a5b31 EC |
1466 | p = skip_item(p, end, ",;"); |
1467 | ||
1468 | /* Include optional PRINTK_CALLER field if it is present */ | |
1469 | p = parse_callerid(p, end, rec); | |
ddca870a KZ |
1470 | |
1471 | mesg: | |
8a6f0cfd | 1472 | /* E) message text */ |
ddca870a KZ |
1473 | rec->mesg = p; |
1474 | p = skip_item(p, end, "\n"); | |
ddca870a KZ |
1475 | if (!p) |
1476 | return -1; | |
1477 | ||
5f538ac4 PB |
1478 | /* The message text is terminated by \n, but it's possible that the |
1479 | * message contains another stuff behind this linebreak; in this case | |
1480 | * the previous skip_item() returns pointer to the stuff behind \n. | |
73afd3f8 | 1481 | * Let's normalize all these situations and make sure we always point to |
5f538ac4 PB |
1482 | * the \n. |
1483 | * | |
1484 | * Note that the next unhexmangle_to_buffer() will replace \n by \0. | |
1485 | */ | |
1486 | if (*p && *p != '\n') | |
1487 | p--; | |
ddca870a KZ |
1488 | |
1489 | /* | |
9e930041 | 1490 | * Kernel escapes non-printable characters, unfortunately kernel |
ddca870a KZ |
1491 | * definition of "non-printable" is too strict. On UTF8 console we can |
1492 | * print many chars, so let's decode from kernel. | |
1493 | */ | |
5f538ac4 PB |
1494 | rec->mesg_size = unhexmangle_to_buffer(rec->mesg, |
1495 | (char *) rec->mesg, p - rec->mesg + 1); | |
1496 | ||
1497 | rec->mesg_size--; /* don't count \0 */ | |
ddca870a | 1498 | |
8a6f0cfd | 1499 | /* F) message tags (ignore) */ |
ddca870a KZ |
1500 | |
1501 | return 0; | |
1502 | } | |
1503 | ||
1504 | /* | |
1505 | * Note that each read() call for /dev/kmsg returns always one record. It means | |
1506 | * that we don't have to read whole message buffer before the records parsing. | |
1507 | * | |
1508 | * So this function does not compose one huge buffer (like read_syslog_buffer()) | |
1509 | * and print_buffer() is unnecessary. All is done in this function. | |
1510 | * | |
1511 | * Returns 0 on success, -1 on error. | |
1512 | */ | |
d8253226 | 1513 | static int process_kmsg(struct dmesg_control *ctl) |
ddca870a | 1514 | { |
ddca870a | 1515 | struct dmesg_record rec; |
298a073c | 1516 | ssize_t sz; |
ddca870a KZ |
1517 | |
1518 | if (ctl->method != DMESG_METHOD_KMSG || ctl->kmsg < 0) | |
1519 | return -1; | |
1520 | ||
467a5b31 EC |
1521 | /* Determine number of PID characters for caller_id spacing */ |
1522 | ctl->caller_id_size = max_threads_id_size(); | |
1523 | ||
298a073c KZ |
1524 | /* |
1525 | * The very first read() call is done in kmsg_init() where we test | |
1526 | * /dev/kmsg usability. The return code from the initial read() is | |
1527 | * stored in ctl->kmsg_first_read; | |
1528 | */ | |
1529 | sz = ctl->kmsg_first_read; | |
ddca870a | 1530 | |
298a073c KZ |
1531 | while (sz > 0) { |
1532 | *(ctl->kmsg_buf + sz) = '\0'; /* for debug messages */ | |
ddca870a | 1533 | |
298a073c KZ |
1534 | if (parse_kmsg_record(ctl, &rec, |
1535 | ctl->kmsg_buf, (size_t) sz) == 0) | |
1536 | print_record(ctl, &rec); | |
37b04d6c | 1537 | |
4ceb601d | 1538 | sz = read_kmsg_one(ctl); |
298a073c | 1539 | } |
ddca870a KZ |
1540 | |
1541 | return 0; | |
1542 | } | |
1543 | ||
01c54718 TW |
1544 | static int process_kmsg_file(struct dmesg_control *ctl, char **buf) |
1545 | { | |
1546 | char str[sizeof(ctl->kmsg_buf)]; | |
1547 | struct dmesg_record rec; | |
1548 | ssize_t sz; | |
1549 | size_t len; | |
1550 | ||
1551 | if (ctl->method != DMESG_METHOD_KMSG || !ctl->filename) | |
1552 | return -1; | |
1553 | ||
1554 | sz = mmap_file_buffer(ctl, buf); | |
1555 | if (sz == -1) | |
1556 | return -1; | |
1557 | ||
1558 | while (sz > 0) { | |
1559 | len = strnlen(ctl->mmap_buff, sz); | |
1560 | if (len > sizeof(str)) | |
1561 | errx(EXIT_FAILURE, _("record too large")); | |
1562 | ||
1563 | memcpy(str, ctl->mmap_buff, len); | |
1564 | ||
1565 | if (parse_kmsg_record(ctl, &rec, str, len) == 0) | |
1566 | print_record(ctl, &rec); | |
1567 | ||
1568 | if (len < (size_t)sz) | |
1569 | len++; | |
1570 | ||
1571 | sz -= len; | |
1572 | ctl->mmap_buff += len; | |
1573 | } | |
1574 | ||
1575 | return 0; | |
1576 | } | |
1577 | ||
eb2306e6 | 1578 | static int which_time_format(const char *s) |
babf605d | 1579 | { |
eb2306e6 | 1580 | if (!strcmp(s, "notime")) |
babf605d | 1581 | return DMESG_TIMEFTM_NONE; |
eb2306e6 | 1582 | if (!strcmp(s, "ctime")) |
babf605d | 1583 | return DMESG_TIMEFTM_CTIME; |
eb2306e6 | 1584 | if (!strcmp(s, "delta")) |
babf605d | 1585 | return DMESG_TIMEFTM_DELTA; |
eb2306e6 | 1586 | if (!strcmp(s, "reltime")) |
babf605d | 1587 | return DMESG_TIMEFTM_RELTIME; |
eb2306e6 | 1588 | if (!strcmp(s, "iso")) |
8a8be309 | 1589 | return DMESG_TIMEFTM_ISO8601; |
3de2e556 RT |
1590 | if (!strcmp(s, "raw")) |
1591 | return DMESG_TIMEFTM_TIME; | |
eb2306e6 | 1592 | errx(EXIT_FAILURE, _("unknown time format: %s"), s); |
babf605d SK |
1593 | } |
1594 | ||
5a34fb8a KZ |
1595 | #ifdef TEST_DMESG |
1596 | static inline int dmesg_get_boot_time(struct timeval *tv) | |
1597 | { | |
1598 | char *str = getenv("DMESG_TEST_BOOTIME"); | |
1599 | uintmax_t sec, usec; | |
1600 | ||
1601 | if (str && sscanf(str, "%ju.%ju", &sec, &usec) == 2) { | |
1602 | tv->tv_sec = sec; | |
1603 | tv->tv_usec = usec; | |
1604 | return tv->tv_sec >= 0 && tv->tv_usec >= 0 ? 0 : -EINVAL; | |
1605 | } | |
1606 | ||
1607 | return get_boot_time(tv); | |
1608 | } | |
9bf622da | 1609 | |
02f3ecd6 | 1610 | static inline usec_t dmesg_get_suspended_time(void) |
9bf622da KK |
1611 | { |
1612 | if (getenv("DMESG_TEST_BOOTIME")) | |
1613 | return 0; | |
1614 | return get_suspended_time(); | |
1615 | } | |
5a34fb8a KZ |
1616 | #else |
1617 | # define dmesg_get_boot_time get_boot_time | |
9bf622da | 1618 | # define dmesg_get_suspended_time get_suspended_time |
5a34fb8a KZ |
1619 | #endif |
1620 | ||
15103c4b MP |
1621 | int main(int argc, char *argv[]) |
1622 | { | |
1623 | char *buf = NULL; | |
aa192520 | 1624 | int c, nopager = 0; |
48c5c662 | 1625 | int console_level = 0; |
6e9b06cc | 1626 | int klog_rc = 0; |
776eabe7 | 1627 | int delta = 0; |
6e9b06cc | 1628 | ssize_t n; |
9b3a6984 | 1629 | static struct dmesg_control ctl = { |
e6471b9f | 1630 | .filename = NULL, |
7ff1f63f | 1631 | .action = SYSLOG_ACTION_READ_ALL, |
ed61acc2 | 1632 | .method = DMESG_METHOD_KMSG, |
7af23060 | 1633 | .kmsg = -1, |
3de2e556 | 1634 | .ntime_fmts = 0, |
b45c3da2 | 1635 | .indent = 0, |
467a5b31 | 1636 | .caller_id_size = 0, |
9b3a6984 | 1637 | }; |
d0c9ddc3 | 1638 | int colormode = UL_COLORMODE_UNDEF; |
babf605d SK |
1639 | enum { |
1640 | OPT_TIME_FORMAT = CHAR_MAX + 1, | |
732d7594 KZ |
1641 | OPT_NOESC, |
1642 | OPT_SINCE, | |
1643 | OPT_UNTIL | |
babf605d | 1644 | }; |
6dbe3af9 | 1645 | |
4a3b7949 | 1646 | static const struct option longopts[] = { |
4a3b7949 | 1647 | { "buffer-size", required_argument, NULL, 's' }, |
5ef05369 | 1648 | { "clear", no_argument, NULL, 'C' }, |
9bc2b51a | 1649 | { "color", optional_argument, NULL, 'L' }, |
4a3b7949 | 1650 | { "console-level", required_argument, NULL, 'n' }, |
bd304d92 KZ |
1651 | { "console-off", no_argument, NULL, 'D' }, |
1652 | { "console-on", no_argument, NULL, 'E' }, | |
5ef05369 | 1653 | { "decode", no_argument, NULL, 'x' }, |
c672220f | 1654 | { "file", required_argument, NULL, 'F' }, |
0e24df3b | 1655 | { "facility", required_argument, NULL, 'f' }, |
0fd12a96 | 1656 | { "follow", no_argument, NULL, 'w' }, |
d7881b0e | 1657 | { "follow-new", no_argument, NULL, 'W' }, |
f0a3a1ca | 1658 | { "human", no_argument, NULL, 'H' }, |
4a3b7949 | 1659 | { "help", no_argument, NULL, 'h' }, |
506b5451 | 1660 | { "json", no_argument, NULL, 'J' }, |
25000180 | 1661 | { "kernel", no_argument, NULL, 'k' }, |
01c54718 | 1662 | { "kmsg-file", required_argument, NULL, 'K' }, |
5ef05369 | 1663 | { "level", required_argument, NULL, 'l' }, |
732d7594 | 1664 | { "since", required_argument, NULL, OPT_SINCE }, |
ed61acc2 | 1665 | { "syslog", no_argument, NULL, 'S' }, |
5ef05369 KZ |
1666 | { "raw", no_argument, NULL, 'r' }, |
1667 | { "read-clear", no_argument, NULL, 'c' }, | |
60464b1f | 1668 | { "reltime", no_argument, NULL, 'e' }, |
bd304d92 | 1669 | { "show-delta", no_argument, NULL, 'd' }, |
42fac79a | 1670 | { "ctime", no_argument, NULL, 'T' }, |
646bba41 | 1671 | { "noescape", no_argument, NULL, OPT_NOESC }, |
d74b8dfc | 1672 | { "notime", no_argument, NULL, 't' }, |
aa192520 | 1673 | { "nopager", no_argument, NULL, 'P' }, |
732d7594 | 1674 | { "until", required_argument, NULL, OPT_UNTIL }, |
25000180 | 1675 | { "userspace", no_argument, NULL, 'u' }, |
5ef05369 | 1676 | { "version", no_argument, NULL, 'V' }, |
babf605d | 1677 | { "time-format", required_argument, NULL, OPT_TIME_FORMAT }, |
5f538ac4 | 1678 | { "force-prefix", no_argument, NULL, 'p' }, |
4a3b7949 KZ |
1679 | { NULL, 0, NULL, 0 } |
1680 | }; | |
1681 | ||
a7349ee3 | 1682 | static const ul_excl_t excl[] = { /* rows and cols in ASCII order */ |
1a38ad5c | 1683 | { 'C','D','E','c','n','r' }, /* clear,off,on,read-clear,level,raw*/ |
01c54718 | 1684 | { 'F','K' }, /* file, kmsg-file */ |
f0a3a1ca | 1685 | { 'H','r' }, /* human, raw */ |
5aaee63c | 1686 | { 'L','r' }, /* color, raw */ |
43d2eeef | 1687 | { 'S','w' }, /* syslog,follow */ |
1a38ad5c KZ |
1688 | { 'T','r' }, /* ctime, raw */ |
1689 | { 'd','r' }, /* delta, raw */ | |
1690 | { 'e','r' }, /* reltime, raw */ | |
1691 | { 'r','x' }, /* raw, decode */ | |
1692 | { 'r','t' }, /* notime, raw */ | |
43d2eeef KZ |
1693 | { 0 } |
1694 | }; | |
1695 | int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT; | |
1696 | ||
df1dddf9 KZ |
1697 | setlocale(LC_ALL, ""); |
1698 | bindtextdomain(PACKAGE, LOCALEDIR); | |
1699 | textdomain(PACKAGE); | |
2c308875 | 1700 | close_stdout_atexit(); |
7eda085c | 1701 | |
423ed6e6 KZ |
1702 | ctl.time_fmts[0] = DMESG_TIMEFTM_DEFAULT; |
1703 | ||
01c54718 | 1704 | while ((c = getopt_long(argc, argv, "CcDdEeF:f:HhJK:kL::l:n:iPprSs:TtuVWwx", |
aca1633a | 1705 | longopts, NULL)) != -1) { |
43d2eeef KZ |
1706 | |
1707 | err_exclusive_options(c, longopts, excl, excl_st); | |
1708 | ||
df1dddf9 | 1709 | switch (c) { |
04199860 | 1710 | case 'C': |
e6471b9f | 1711 | ctl.action = SYSLOG_ACTION_CLEAR; |
04199860 | 1712 | break; |
df1dddf9 | 1713 | case 'c': |
e6471b9f | 1714 | ctl.action = SYSLOG_ACTION_READ_CLEAR; |
df1dddf9 | 1715 | break; |
bd304d92 | 1716 | case 'D': |
e6471b9f | 1717 | ctl.action = SYSLOG_ACTION_CONSOLE_OFF; |
2170174e | 1718 | break; |
bd304d92 | 1719 | case 'd': |
776eabe7 | 1720 | delta = 1; |
bd304d92 KZ |
1721 | break; |
1722 | case 'E': | |
e6471b9f | 1723 | ctl.action = SYSLOG_ACTION_CONSOLE_ON; |
2170174e | 1724 | break; |
60464b1f | 1725 | case 'e': |
3de2e556 | 1726 | include_time_fmt(&ctl, DMESG_TIMEFTM_RELTIME); |
60464b1f | 1727 | break; |
c672220f | 1728 | case 'F': |
9b3a6984 | 1729 | ctl.filename = optarg; |
e6471b9f | 1730 | ctl.method = DMESG_METHOD_MMAP; |
467a5b31 | 1731 | ctl.caller_id_size = SYSLOG_DEFAULT_CALLER_ID_CHARS; |
c672220f | 1732 | break; |
01c54718 TW |
1733 | case 'K': |
1734 | ctl.filename = optarg; | |
1735 | ctl.method = DMESG_METHOD_KMSG; | |
467a5b31 | 1736 | ctl.caller_id_size = max_threads_id_size(); |
01c54718 | 1737 | break; |
0e24df3b | 1738 | case 'f': |
aca1633a | 1739 | ctl.fltr_fac = 1; |
c87638ad | 1740 | if (string_to_bitarray(optarg, |
73a96af6 | 1741 | ctl.facilities, parse_facility, 0) < 0) |
c87638ad | 1742 | return EXIT_FAILURE; |
0e24df3b | 1743 | break; |
f0a3a1ca | 1744 | case 'H': |
3de2e556 | 1745 | include_time_fmt(&ctl, DMESG_TIMEFTM_RELTIME); |
81bd88e4 | 1746 | colormode = UL_COLORMODE_AUTO; |
aa192520 | 1747 | ctl.pager = 1; |
f0a3a1ca | 1748 | break; |
506b5451 KZ |
1749 | case 'J': |
1750 | ctl.json = 1; | |
1751 | break; | |
25000180 | 1752 | case 'k': |
aca1633a KZ |
1753 | ctl.fltr_fac = 1; |
1754 | setbit(ctl.facilities, FAC_BASE(LOG_KERN)); | |
25000180 | 1755 | break; |
098ce273 | 1756 | case 'L': |
9bc2b51a | 1757 | colormode = UL_COLORMODE_AUTO; |
b7faf991 KZ |
1758 | if (optarg) |
1759 | colormode = colormode_or_err(optarg, | |
1760 | _("unsupported color mode")); | |
098ce273 | 1761 | break; |
636a6207 | 1762 | case 'l': |
aca1633a | 1763 | ctl.fltr_lev= 1; |
c87638ad | 1764 | if (string_to_bitarray(optarg, |
73a96af6 TW |
1765 | ctl.levels, parse_level, |
1766 | ARRAY_SIZE(level_names)) < 0) | |
c87638ad | 1767 | return EXIT_FAILURE; |
636a6207 | 1768 | break; |
5ef05369 | 1769 | case 'n': |
e6471b9f | 1770 | ctl.action = SYSLOG_ACTION_CONSOLE_LEVEL; |
5ef05369 KZ |
1771 | console_level = parse_level(optarg, 0); |
1772 | break; | |
aa192520 KZ |
1773 | case 'P': |
1774 | nopager = 1; | |
1775 | break; | |
5f538ac4 PB |
1776 | case 'p': |
1777 | ctl.force_prefix = 1; | |
1778 | break; | |
11ea22d5 | 1779 | case 'r': |
aca1633a | 1780 | ctl.raw = 1; |
11ea22d5 | 1781 | break; |
ed61acc2 KZ |
1782 | case 'S': |
1783 | ctl.method = DMESG_METHOD_SYSLOG; | |
1784 | break; | |
df1dddf9 | 1785 | case 's': |
e6471b9f KZ |
1786 | ctl.bufsize = strtou32_or_err(optarg, |
1787 | _("invalid buffer size argument")); | |
1788 | if (ctl.bufsize < 4096) | |
1789 | ctl.bufsize = 4096; | |
df1dddf9 | 1790 | break; |
42fac79a | 1791 | case 'T': |
3de2e556 | 1792 | include_time_fmt(&ctl, DMESG_TIMEFTM_CTIME); |
42fac79a | 1793 | break; |
d74b8dfc | 1794 | case 't': |
3de2e556 RT |
1795 | reset_time_fmts(&ctl); |
1796 | include_time_fmt(&ctl, DMESG_TIMEFTM_NONE); | |
d74b8dfc | 1797 | break; |
25000180 | 1798 | case 'u': |
aca1633a | 1799 | ctl.fltr_fac = 1; |
738767b9 | 1800 | for (n = 1; (size_t) n < ARRAY_SIZE(facility_names); n++) |
aca1633a | 1801 | setbit(ctl.facilities, n); |
25000180 | 1802 | break; |
0fd12a96 | 1803 | case 'w': |
0fd12a96 KZ |
1804 | ctl.follow = 1; |
1805 | break; | |
d7881b0e KK |
1806 | case 'W': |
1807 | ctl.follow = 1; | |
1808 | ctl.end = 1; | |
1809 | break; | |
5ef05369 | 1810 | case 'x': |
aca1633a | 1811 | ctl.decode = 1; |
4a3b7949 | 1812 | break; |
babf605d | 1813 | case OPT_TIME_FORMAT: |
3de2e556 | 1814 | include_time_fmt(&ctl, which_time_format(optarg)); |
babf605d | 1815 | break; |
646bba41 KZ |
1816 | case OPT_NOESC: |
1817 | ctl.noesc = 1; | |
1818 | break; | |
732d7594 KZ |
1819 | case OPT_SINCE: |
1820 | { | |
d1e5764c | 1821 | if (parse_timestamp(optarg, &ctl.since) < 0) |
732d7594 | 1822 | errx(EXIT_FAILURE, _("invalid time value \"%s\""), optarg); |
732d7594 KZ |
1823 | break; |
1824 | } | |
1825 | case OPT_UNTIL: | |
1826 | { | |
d1e5764c | 1827 | if (parse_timestamp(optarg, &ctl.until) < 0) |
732d7594 | 1828 | errx(EXIT_FAILURE, _("invalid time value \"%s\""), optarg); |
732d7594 KZ |
1829 | break; |
1830 | } | |
2c308875 KZ |
1831 | case 'h': |
1832 | usage(); | |
1833 | case 'V': | |
1834 | print_version(EXIT_SUCCESS); | |
df1dddf9 | 1835 | default: |
677ec86c | 1836 | errtryhelp(EXIT_FAILURE); |
df1dddf9 KZ |
1837 | } |
1838 | } | |
e6c379eb | 1839 | |
6e1eda6f RM |
1840 | if (argc != optind) { |
1841 | warnx(_("bad usage")); | |
1842 | errtryhelp(EXIT_FAILURE); | |
1843 | } | |
6dbe3af9 | 1844 | |
506b5451 | 1845 | if (ctl.json) { |
3de2e556 RT |
1846 | reset_time_fmts(&ctl); |
1847 | ctl.ntime_fmts = 0; | |
506b5451 KZ |
1848 | delta = 0; |
1849 | ctl.force_prefix = 0; | |
1850 | ctl.raw = 0; | |
1851 | ctl.noesc = 1; | |
1852 | nopager = 1; | |
1853 | } | |
1854 | ||
3de2e556 RT |
1855 | if ((is_time_fmt_set(&ctl, DMESG_TIMEFTM_RELTIME) || |
1856 | is_time_fmt_set(&ctl, DMESG_TIMEFTM_CTIME) || | |
1857 | is_time_fmt_set(&ctl, DMESG_TIMEFTM_ISO8601)) || | |
c9667633 KZ |
1858 | ctl.since || |
1859 | ctl.until) { | |
9bf622da | 1860 | if (dmesg_get_boot_time(&ctl.boot_time) != 0) |
3de2e556 | 1861 | include_time_fmt(&ctl, DMESG_TIMEFTM_NONE); |
9bf622da KK |
1862 | else |
1863 | ctl.suspended_time = dmesg_get_suspended_time(); | |
1864 | } | |
9bc2b51a | 1865 | |
3de2e556 RT |
1866 | if (delta || is_time_fmt_set(&ctl, DMESG_TIMEFTM_DELTA)) { |
1867 | if (is_time_fmt_set(&ctl, DMESG_TIMEFTM_TIME)) { | |
1868 | if (ctl.ntime_fmts == 0) { | |
1869 | ctl.time_fmts[ctl.ntime_fmts++] = DMESG_TIMEFTM_TIME_DELTA; | |
1870 | } else { | |
1871 | exclude_time_fmt(&ctl, DMESG_TIMEFTM_DELTA); | |
1872 | for (n = 0; (size_t) n < ctl.ntime_fmts; n++) { | |
1873 | if (ctl.time_fmts[n] == DMESG_TIMEFTM_TIME) { | |
1874 | ctl.time_fmts[n] = DMESG_TIMEFTM_TIME_DELTA; | |
1875 | break; | |
1876 | } | |
1877 | } | |
1878 | } | |
1879 | } else if (is_time_fmt_set(&ctl, DMESG_TIMEFTM_CTIME)) { | |
1880 | exclude_time_fmt(&ctl, DMESG_TIMEFTM_DELTA); | |
1881 | for (n = 0; (size_t) n < ctl.ntime_fmts; n++) { | |
1882 | if (ctl.time_fmts[n] == DMESG_TIMEFTM_CTIME) { | |
1883 | ctl.time_fmts[n] = DMESG_TIMEFTM_CTIME_DELTA; | |
1884 | break; | |
1885 | } | |
1886 | } | |
1887 | } else { | |
1888 | include_time_fmt(&ctl, DMESG_TIMEFTM_DELTA); | |
776eabe7 | 1889 | } |
0619aa8f | 1890 | } |
776eabe7 | 1891 | |
506b5451 KZ |
1892 | if (!ctl.json) |
1893 | ctl.color = colors_init(colormode, "dmesg") ? 1 : 0; | |
5042cdcf KZ |
1894 | if (ctl.follow) |
1895 | nopager = 1; | |
aa192520 | 1896 | ctl.pager = nopager ? 0 : ctl.pager; |
aa192520 | 1897 | |
e6471b9f | 1898 | switch (ctl.action) { |
48c5c662 KZ |
1899 | case SYSLOG_ACTION_READ_ALL: |
1900 | case SYSLOG_ACTION_READ_CLEAR: | |
01c54718 | 1901 | if (ctl.method == DMESG_METHOD_KMSG && !ctl.filename && init_kmsg(&ctl) != 0) |
7af23060 | 1902 | ctl.method = DMESG_METHOD_SYSLOG; |
1a38ad5c KZ |
1903 | |
1904 | if (ctl.raw | |
1905 | && ctl.method != DMESG_METHOD_KMSG | |
1906 | && (ctl.fltr_lev || ctl.fltr_fac)) | |
62698149 BS |
1907 | errx(EXIT_FAILURE, _("--raw can be used together with --level or " |
1908 | "--facility only when reading messages from /dev/kmsg")); | |
5f538ac4 | 1909 | |
5f538ac4 | 1910 | if (ctl.force_prefix && ctl.method != DMESG_METHOD_KMSG) |
ead07631 | 1911 | errx(EXIT_FAILURE, _("only kmsg supports multi-line messages")); |
aa192520 | 1912 | if (ctl.pager) |
e215d467 | 1913 | pager_redirect(); |
d8253226 | 1914 | n = process_buffer(&ctl, &buf); |
6e9b06cc KZ |
1915 | if (n > 0) |
1916 | print_buffer(&ctl, buf, n); | |
7ff1f63f | 1917 | if (!ctl.mmap_buff) |
c672220f | 1918 | free(buf); |
6e9b06cc KZ |
1919 | if (ctl.kmsg >= 0) |
1920 | close(ctl.kmsg); | |
506b5451 KZ |
1921 | if (ctl.json && ul_jsonwrt_is_ready(&ctl.jfmt)) { |
1922 | ul_jsonwrt_array_close(&ctl.jfmt); | |
1923 | ul_jsonwrt_root_close(&ctl.jfmt); | |
1924 | } | |
50cc6332 KZ |
1925 | if (n < 0) |
1926 | err(EXIT_FAILURE, _("read kernel buffer failed")); | |
0272f2ef | 1927 | else if (ctl.action == SYSLOG_ACTION_READ_CLEAR) |
610538bf | 1928 | ; |
50cc6332 KZ |
1929 | else |
1930 | break; | |
610538bf | 1931 | /* fallthrough */ |
04199860 | 1932 | case SYSLOG_ACTION_CLEAR: |
50cc6332 KZ |
1933 | if (klogctl(SYSLOG_ACTION_CLEAR, NULL, 0) < 0) |
1934 | err(EXIT_FAILURE, _("clear kernel buffer failed")); | |
1935 | break; | |
2170174e KZ |
1936 | case SYSLOG_ACTION_CONSOLE_OFF: |
1937 | case SYSLOG_ACTION_CONSOLE_ON: | |
6e9b06cc | 1938 | klog_rc = klogctl(ctl.action, NULL, 0); |
04199860 | 1939 | break; |
48c5c662 | 1940 | case SYSLOG_ACTION_CONSOLE_LEVEL: |
6e9b06cc | 1941 | klog_rc = klogctl(ctl.action, NULL, console_level); |
48c5c662 KZ |
1942 | break; |
1943 | default: | |
1944 | errx(EXIT_FAILURE, _("unsupported command")); | |
1945 | break; | |
df1dddf9 | 1946 | } |
6dbe3af9 | 1947 | |
7af23060 | 1948 | |
6e9b06cc | 1949 | if (klog_rc) |
15103c4b | 1950 | err(EXIT_FAILURE, _("klogctl failed")); |
6dbe3af9 | 1951 | |
15103c4b | 1952 | return EXIT_SUCCESS; |
6dbe3af9 | 1953 | } |