]>
Commit | Line | Data |
---|---|---|
87d2c1ff LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2011 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
87d2c1ff LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
87d2c1ff | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
87d2c1ff LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <fcntl.h> | |
23 | #include <errno.h> | |
24 | #include <stddef.h> | |
3fbf9cbb LP |
25 | #include <string.h> |
26 | #include <stdio.h> | |
27 | #include <unistd.h> | |
28 | #include <stdlib.h> | |
50f20cfd | 29 | #include <sys/poll.h> |
72f59706 | 30 | #include <time.h> |
0d43c694 | 31 | #include <getopt.h> |
50940700 | 32 | #include <sys/stat.h> |
87d2c1ff | 33 | |
81527be1 LP |
34 | #include <systemd/sd-journal.h> |
35 | ||
3fbf9cbb | 36 | #include "log.h" |
72f59706 | 37 | #include "util.h" |
0d43c694 LP |
38 | #include "build.h" |
39 | #include "pager.h" | |
86aa7ba4 | 40 | #include "logs-show.h" |
250d54b5 | 41 | |
50940700 SL |
42 | #define SD_JOURNALCTL_EXE "_EXE=" |
43 | ||
df50185b | 44 | static OutputMode arg_output = OUTPUT_SHORT; |
72f59706 LP |
45 | static bool arg_follow = false; |
46 | static bool arg_show_all = false; | |
0d43c694 | 47 | static bool arg_no_pager = false; |
2100675e | 48 | static int arg_lines = -1; |
e91af489 | 49 | static bool arg_no_tail = false; |
39f7f5c1 | 50 | static bool arg_new_id128 = false; |
43673799 | 51 | static bool arg_quiet = false; |
2bd3c38a | 52 | static bool arg_local = false; |
50f20cfd | 53 | |
0d43c694 LP |
54 | static int help(void) { |
55 | ||
89834a7c | 56 | printf("%s [OPTIONS...] [MATCH]\n\n" |
df50185b | 57 | "Send control commands to or query the journal.\n\n" |
0d43c694 LP |
58 | " -h --help Show this help\n" |
59 | " --version Show package version\n" | |
60 | " --no-pager Do not pipe output into a pager\n" | |
2af777ba | 61 | " -a --all Show all fields, including long and unprintable\n" |
0d43c694 | 62 | " -f --follow Follow journal\n" |
df50185b | 63 | " -n --lines=INTEGER Journal entries to show\n" |
e91af489 | 64 | " --no-tail Show all lines, even in follow mode\n" |
d3f2bdbf LP |
65 | " -o --output=STRING Change journal output mode (short, short-monotonic,\n" |
66 | " verbose, export, json, cat)\n" | |
43673799 | 67 | " -q --quiet Don't show privilege warning\n" |
2bd3c38a LP |
68 | " --new-id128 Generate a new 128 Bit id\n" |
69 | " -l --local Only local entries\n", | |
0d43c694 LP |
70 | program_invocation_short_name); |
71 | ||
72 | return 0; | |
73 | } | |
74 | ||
75 | static int parse_argv(int argc, char *argv[]) { | |
76 | ||
77 | enum { | |
78 | ARG_VERSION = 0x100, | |
e91af489 | 79 | ARG_NO_PAGER, |
55ee336c | 80 | ARG_NO_TAIL, |
39f7f5c1 | 81 | ARG_NEW_ID128 |
0d43c694 LP |
82 | }; |
83 | ||
84 | static const struct option options[] = { | |
85 | { "help", no_argument, NULL, 'h' }, | |
86 | { "version" , no_argument, NULL, ARG_VERSION }, | |
87 | { "no-pager", no_argument, NULL, ARG_NO_PAGER }, | |
88 | { "follow", no_argument, NULL, 'f' }, | |
89 | { "output", required_argument, NULL, 'o' }, | |
90 | { "all", no_argument, NULL, 'a' }, | |
2100675e | 91 | { "lines", required_argument, NULL, 'n' }, |
e91af489 | 92 | { "no-tail", no_argument, NULL, ARG_NO_TAIL }, |
39f7f5c1 | 93 | { "new-id128", no_argument, NULL, ARG_NEW_ID128 }, |
43673799 | 94 | { "quiet", no_argument, NULL, 'q' }, |
2bd3c38a | 95 | { "local", no_argument, NULL, 'l' }, |
0d43c694 LP |
96 | { NULL, 0, NULL, 0 } |
97 | }; | |
98 | ||
2100675e | 99 | int c, r; |
0d43c694 LP |
100 | |
101 | assert(argc >= 0); | |
102 | assert(argv); | |
103 | ||
2bd3c38a | 104 | while ((c = getopt_long(argc, argv, "hfo:an:ql", options, NULL)) >= 0) { |
0d43c694 LP |
105 | |
106 | switch (c) { | |
107 | ||
108 | case 'h': | |
109 | help(); | |
110 | return 0; | |
111 | ||
112 | case ARG_VERSION: | |
113 | puts(PACKAGE_STRING); | |
114 | puts(DISTRIBUTION); | |
115 | puts(SYSTEMD_FEATURES); | |
116 | return 0; | |
117 | ||
118 | case ARG_NO_PAGER: | |
119 | arg_no_pager = true; | |
120 | break; | |
121 | ||
122 | case 'f': | |
123 | arg_follow = true; | |
124 | break; | |
125 | ||
126 | case 'o': | |
df50185b LP |
127 | arg_output = output_mode_from_string(optarg); |
128 | if (arg_output < 0) { | |
0d43c694 LP |
129 | log_error("Unknown output '%s'.", optarg); |
130 | return -EINVAL; | |
131 | } | |
df50185b | 132 | |
0d43c694 LP |
133 | break; |
134 | ||
135 | case 'a': | |
136 | arg_show_all = true; | |
137 | break; | |
138 | ||
2100675e LP |
139 | case 'n': |
140 | r = safe_atoi(optarg, &arg_lines); | |
e91af489 | 141 | if (r < 0 || arg_lines < 0) { |
2100675e LP |
142 | log_error("Failed to parse lines '%s'", optarg); |
143 | return -EINVAL; | |
144 | } | |
145 | break; | |
146 | ||
e91af489 LP |
147 | case ARG_NO_TAIL: |
148 | arg_no_tail = true; | |
149 | break; | |
150 | ||
39f7f5c1 LP |
151 | case ARG_NEW_ID128: |
152 | arg_new_id128 = true; | |
55ee336c LP |
153 | break; |
154 | ||
43673799 LP |
155 | case 'q': |
156 | arg_quiet = true; | |
490e567d | 157 | break; |
43673799 | 158 | |
2bd3c38a LP |
159 | case 'l': |
160 | arg_local = true; | |
161 | break; | |
162 | ||
0d43c694 LP |
163 | case '?': |
164 | return -EINVAL; | |
165 | ||
166 | default: | |
167 | log_error("Unknown option code %c", c); | |
168 | return -EINVAL; | |
169 | } | |
170 | } | |
171 | ||
62f21ec9 | 172 | if (arg_follow && !arg_no_tail && arg_lines < 0) |
e91af489 LP |
173 | arg_lines = 10; |
174 | ||
0d43c694 LP |
175 | return 1; |
176 | } | |
177 | ||
39f7f5c1 | 178 | static int generate_new_id128(void) { |
55ee336c LP |
179 | sd_id128_t id; |
180 | int r; | |
181 | unsigned i; | |
182 | ||
183 | r = sd_id128_randomize(&id); | |
184 | if (r < 0) { | |
185 | log_error("Failed to generate ID: %s", strerror(-r)); | |
186 | return r; | |
187 | } | |
188 | ||
189 | printf("As string:\n" | |
190 | SD_ID128_FORMAT_STR "\n\n" | |
191 | "As UUID:\n" | |
192 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n\n" | |
193 | "As macro:\n" | |
194 | "#define MESSAGE_XYZ SD_ID128_MAKE(", | |
195 | SD_ID128_FORMAT_VAL(id), | |
196 | SD_ID128_FORMAT_VAL(id)); | |
197 | ||
198 | for (i = 0; i < 16; i++) | |
199 | printf("%02x%s", id.bytes[i], i != 15 ? "," : ""); | |
200 | ||
201 | fputs(")\n", stdout); | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
87d2c1ff | 206 | int main(int argc, char *argv[]) { |
50f20cfd | 207 | int r, i, fd; |
3fbf9cbb | 208 | sd_journal *j = NULL; |
72f59706 | 209 | unsigned line = 0; |
6f003b43 | 210 | bool need_seek = false; |
50940700 SL |
211 | struct stat st; |
212 | char* journal_exe_buff; | |
3fbf9cbb | 213 | |
87d2c1ff LP |
214 | log_parse_environment(); |
215 | log_open(); | |
216 | ||
0d43c694 LP |
217 | r = parse_argv(argc, argv); |
218 | if (r <= 0) | |
219 | goto finish; | |
220 | ||
39f7f5c1 LP |
221 | if (arg_new_id128) { |
222 | r = generate_new_id128(); | |
55ee336c LP |
223 | goto finish; |
224 | } | |
225 | ||
4f4d6a70 | 226 | #ifdef HAVE_ACL |
43673799 LP |
227 | if (!arg_quiet && geteuid() != 0 && in_group("adm") <= 0) |
228 | log_warning("Showing user generated messages only. Users in the group 'adm' can see all messages. Pass -q to turn this message off."); | |
4f4d6a70 | 229 | #endif |
43673799 | 230 | |
2bd3c38a | 231 | r = sd_journal_open(&j, arg_local ? SD_JOURNAL_LOCAL_ONLY : 0); |
87d2c1ff LP |
232 | if (r < 0) { |
233 | log_error("Failed to open journal: %s", strerror(-r)); | |
3fbf9cbb | 234 | goto finish; |
87d2c1ff LP |
235 | } |
236 | ||
0d43c694 | 237 | for (i = optind; i < argc; i++) { |
50940700 SL |
238 | if (strchr(argv[i], '=')) { |
239 | r = sd_journal_add_match(j, argv[i], strlen(argv[i])); | |
240 | } else { | |
241 | if (stat(argv[i], &st) < 0) { | |
242 | log_error("Failed to add match: %s", strerror(-r)); | |
243 | goto finish; /* maybe try sd_journal_add_match() when stat() fails, | |
244 | * even thought we know there is no '=' ? */ | |
245 | } else if (S_ISREG(st.st_mode) && | |
246 | S_IXUSR & st.st_mode) { | |
247 | journal_exe_buff = malloc(strlen(SD_JOURNALCTL_EXE) + strlen(argv[i]) + 1); | |
248 | journal_exe_buff = strcpy(journal_exe_buff, SD_JOURNALCTL_EXE); | |
249 | strncat(journal_exe_buff, argv[i], strlen(argv[i])); | |
250 | r = sd_journal_add_match(j, journal_exe_buff, strlen(journal_exe_buff)); | |
251 | free(journal_exe_buff); | |
252 | } else { | |
253 | log_error("File is not a regular file or is not executable: %s", argv[i]); | |
254 | goto finish; | |
255 | } | |
256 | } | |
de7b95cd LP |
257 | if (r < 0) { |
258 | log_error("Failed to add match: %s", strerror(-r)); | |
259 | goto finish; | |
260 | } | |
261 | } | |
262 | ||
50f20cfd LP |
263 | fd = sd_journal_get_fd(j); |
264 | if (fd < 0) { | |
265 | log_error("Failed to get wakeup fd: %s", strerror(-fd)); | |
266 | goto finish; | |
267 | } | |
8725d60a | 268 | |
2100675e LP |
269 | if (arg_lines >= 0) { |
270 | r = sd_journal_seek_tail(j); | |
271 | if (r < 0) { | |
272 | log_error("Failed to seek to tail: %s", strerror(-r)); | |
273 | goto finish; | |
274 | } | |
275 | ||
276 | r = sd_journal_previous_skip(j, arg_lines); | |
2100675e LP |
277 | } else { |
278 | r = sd_journal_seek_head(j); | |
279 | if (r < 0) { | |
280 | log_error("Failed to seek to head: %s", strerror(-r)); | |
281 | goto finish; | |
282 | } | |
6f003b43 LP |
283 | |
284 | r = sd_journal_next(j); | |
285 | } | |
286 | ||
287 | if (r < 0) { | |
288 | log_error("Failed to iterate through journal: %s", strerror(-r)); | |
289 | goto finish; | |
50f20cfd | 290 | } |
87d2c1ff | 291 | |
0d43c694 LP |
292 | if (!arg_no_pager && !arg_follow) { |
293 | columns(); | |
294 | pager_open(); | |
295 | } | |
296 | ||
297 | if (arg_output == OUTPUT_JSON) { | |
72f59706 | 298 | fputc('[', stdout); |
0d43c694 LP |
299 | fflush(stdout); |
300 | } | |
72f59706 | 301 | |
50f20cfd | 302 | for (;;) { |
0d43c694 | 303 | for (;;) { |
6f003b43 LP |
304 | if (need_seek) { |
305 | r = sd_journal_next(j); | |
306 | if (r < 0) { | |
307 | log_error("Failed to iterate through journal: %s", strerror(-r)); | |
308 | goto finish; | |
309 | } | |
0d43c694 LP |
310 | } |
311 | ||
312 | if (r == 0) | |
313 | break; | |
314 | ||
72f59706 | 315 | line ++; |
50f20cfd | 316 | |
34a35ece | 317 | r = output_journal(j, arg_output, line, 0, arg_show_all); |
72f59706 LP |
318 | if (r < 0) |
319 | goto finish; | |
6f003b43 LP |
320 | |
321 | need_seek = true; | |
87d2c1ff LP |
322 | } |
323 | ||
50f20cfd LP |
324 | if (!arg_follow) |
325 | break; | |
326 | ||
8f2d43a0 | 327 | r = fd_wait_for_event(fd, POLLIN, (usec_t) -1); |
df50185b LP |
328 | if (r < 0) { |
329 | log_error("Couldn't wait for event: %s", strerror(-r)); | |
50f20cfd LP |
330 | goto finish; |
331 | } | |
8725d60a | 332 | |
50f20cfd LP |
333 | r = sd_journal_process(j); |
334 | if (r < 0) { | |
335 | log_error("Failed to process: %s", strerror(-r)); | |
336 | goto finish; | |
337 | } | |
de190aef | 338 | } |
87d2c1ff | 339 | |
72f59706 LP |
340 | if (arg_output == OUTPUT_JSON) |
341 | fputs("\n]\n", stdout); | |
342 | ||
87d2c1ff | 343 | finish: |
3fbf9cbb LP |
344 | if (j) |
345 | sd_journal_close(j); | |
87d2c1ff | 346 | |
0d43c694 LP |
347 | pager_close(); |
348 | ||
3fbf9cbb | 349 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
87d2c1ff | 350 | } |