1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2012 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
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
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
28 #include "logs-show.h"
32 #define PRINT_THRESHOLD 128
34 static bool contains_unprintable(const void *p, size_t l) {
37 for (j = p; j < (const char *) p + l; j++)
38 if (*j < ' ' || *j >= 127)
44 static int parse_field(const void *data, size_t length, const char *field, char **target, size_t *target_size) {
57 if (memcmp(data, field, fl))
62 memcpy(buf, (const char*) data + fl, nl);
65 log_error("Out of memory");
76 static bool shall_print(bool show_all, char *p, size_t l) {
80 if (l > PRINT_THRESHOLD)
83 if (contains_unprintable(p, l))
89 static int output_short(sd_journal *j, unsigned line, bool show_all, bool monotonic_mode) {
94 char *hostname = NULL, *identifier = NULL, *comm = NULL, *pid = NULL, *fake_pid = NULL, *message = NULL, *realtime = NULL, *monotonic = NULL;
95 size_t hostname_len = 0, identifier_len = 0, comm_len = 0, pid_len = 0, fake_pid_len = 0, message_len = 0, realtime_len = 0, monotonic_len = 0;
99 SD_JOURNAL_FOREACH_DATA(j, data, length) {
101 r = parse_field(data, length, "_HOSTNAME=", &hostname, &hostname_len);
107 r = parse_field(data, length, "SYSLOG_IDENTIFIER=", &identifier, &identifier_len);
113 r = parse_field(data, length, "_COMM=", &comm, &comm_len);
119 r = parse_field(data, length, "_PID=", &pid, &pid_len);
125 r = parse_field(data, length, "SYSLOG_PID=", &fake_pid, &fake_pid_len);
131 r = parse_field(data, length, "_SOURCE_REALTIME_TIMESTAMP=", &realtime, &realtime_len);
137 r = parse_field(data, length, "_SOURCE_MONOTONIC_TIMESTAMP=", &monotonic, &monotonic_len);
143 r = parse_field(data, length, "MESSAGE=", &message, &message_len);
153 if (monotonic_mode) {
160 r = safe_atou64(monotonic, &t);
163 r = sd_journal_get_monotonic_usec(j, &t, &boot_id);
166 log_error("Failed to get monotonic: %s", strerror(-r));
170 printf("[%5llu.%06llu]",
171 (unsigned long long) (t / USEC_PER_SEC),
172 (unsigned long long) (t % USEC_PER_SEC));
174 n += 1 + 5 + 1 + 6 + 1;
185 r = safe_atou64(realtime, &x);
188 r = sd_journal_get_realtime_usec(j, &x);
191 log_error("Failed to get realtime: %s", strerror(-r));
195 t = (time_t) (x / USEC_PER_SEC);
196 if (strftime(buf, sizeof(buf), "%b %d %H:%M:%S", localtime_r(&t, &tm)) <= 0) {
197 log_error("Failed to format time.");
205 if (hostname && shall_print(show_all, hostname, hostname_len)) {
206 printf(" %.*s", (int) hostname_len, hostname);
207 n += hostname_len + 1;
210 if (identifier && shall_print(show_all, identifier, identifier_len)) {
211 printf(" %.*s", (int) identifier_len, identifier);
212 n += identifier_len + 1;
213 } else if (comm && shall_print(show_all, comm, comm_len)) {
214 printf(" %.*s", (int) comm_len, comm);
218 if (pid && shall_print(show_all, pid, pid_len)) {
219 printf("[%.*s]", (int) pid_len, pid);
221 } else if (fake_pid && shall_print(show_all, fake_pid, fake_pid_len)) {
222 printf("[%.*s]", (int) fake_pid_len, fake_pid);
223 n += fake_pid_len + 2;
227 printf(": %.*s\n", (int) message_len, message);
228 else if (contains_unprintable(message, message_len))
229 fputs(": [blob data]\n", stdout);
230 else if (message_len + n < columns())
231 printf(": %.*s\n", (int) message_len, message);
232 else if (n < columns()) {
235 e = ellipsize_mem(message, message_len, columns() - n - 2, 90);
238 printf(": %.*s\n", (int) message_len, message);
261 static int output_short_realtime(sd_journal *j, unsigned line, bool show_all) {
262 return output_short(j, line, show_all, false);
265 static int output_short_monotonic(sd_journal *j, unsigned line, bool show_all) {
266 return output_short(j, line, show_all, true);
269 static int output_verbose(sd_journal *j, unsigned line, bool show_all) {
274 char ts[FORMAT_TIMESTAMP_MAX];
279 r = sd_journal_get_realtime_usec(j, &realtime);
281 log_error("Failed to get realtime timestamp: %s", strerror(-r));
285 r = sd_journal_get_cursor(j, &cursor);
287 log_error("Failed to get cursor: %s", strerror(-r));
292 format_timestamp(ts, sizeof(ts), realtime),
297 SD_JOURNAL_FOREACH_DATA(j, data, length) {
298 if (!show_all && (length > PRINT_THRESHOLD ||
299 contains_unprintable(data, length))) {
302 c = memchr(data, '=', length);
304 log_error("Invalid field.");
308 printf("\t%.*s=[blob data]\n",
309 (int) (c - (const char*) data),
312 printf("\t%.*s\n", (int) length, (const char*) data);
318 static int output_export(sd_journal *j, unsigned line, bool show_all) {
322 usec_t realtime, monotonic;
329 r = sd_journal_get_realtime_usec(j, &realtime);
331 log_error("Failed to get realtime timestamp: %s", strerror(-r));
335 r = sd_journal_get_monotonic_usec(j, &monotonic, &boot_id);
337 log_error("Failed to get monotonic timestamp: %s", strerror(-r));
341 r = sd_journal_get_cursor(j, &cursor);
343 log_error("Failed to get cursor: %s", strerror(-r));
347 printf(".cursor=%s\n"
352 (unsigned long long) realtime,
353 (unsigned long long) monotonic,
354 sd_id128_to_string(boot_id, sid));
358 SD_JOURNAL_FOREACH_DATA(j, data, length) {
360 if (contains_unprintable(data, length)) {
364 c = memchr(data, '=', length);
366 log_error("Invalid field.");
370 fwrite(data, c - (const char*) data, 1, stdout);
372 le64 = htole64(length - (c - (const char*) data) - 1);
373 fwrite(&le64, sizeof(le64), 1, stdout);
374 fwrite(c + 1, length - (c - (const char*) data) - 1, 1, stdout);
376 fwrite(data, length, 1, stdout);
386 static void json_escape(const char* p, size_t l) {
388 if (contains_unprintable(p, l)) {
389 bool not_first = false;
395 printf(", %u", (uint8_t) *p);
398 printf("%u", (uint8_t) *p);
410 if (*p == '"' || *p == '\\') {
424 static int output_json(sd_journal *j, unsigned line, bool show_all) {
425 uint64_t realtime, monotonic;
435 r = sd_journal_get_realtime_usec(j, &realtime);
437 log_error("Failed to get realtime timestamp: %s", strerror(-r));
441 r = sd_journal_get_monotonic_usec(j, &monotonic, &boot_id);
443 log_error("Failed to get monotonic timestamp: %s", strerror(-r));
447 r = sd_journal_get_cursor(j, &cursor);
449 log_error("Failed to get cursor: %s", strerror(-r));
456 fputs(",\n", stdout);
459 "\t\".cursor\" : \"%s\",\n"
460 "\t\".realtime\" : %llu,\n"
461 "\t\".monotonic\" : %llu,\n"
462 "\t\".boot_id\" : \"%s\"",
464 (unsigned long long) realtime,
465 (unsigned long long) monotonic,
466 sd_id128_to_string(boot_id, sid));
470 SD_JOURNAL_FOREACH_DATA(j, data, length) {
473 c = memchr(data, '=', length);
475 log_error("Invalid field.");
479 fputs(",\n\t", stdout);
480 json_escape(data, c - (const char*) data);
481 fputs(" : ", stdout);
482 json_escape(c + 1, length - (c - (const char*) data) - 1);
485 fputs("\n}", stdout);
491 static int output_cat(sd_journal *j, unsigned line, bool show_all) {
498 r = sd_journal_get_data(j, "MESSAGE", &data, &l);
500 log_error("Failed to get data: %s", strerror(-r));
506 fwrite((const char*) data + 8, 1, l - 8, stdout);
512 static int (*output_funcs[_OUTPUT_MODE_MAX])(sd_journal*j, unsigned line, bool show_all) = {
513 [OUTPUT_SHORT] = output_short_realtime,
514 [OUTPUT_SHORT_MONOTONIC] = output_short_monotonic,
515 [OUTPUT_VERBOSE] = output_verbose,
516 [OUTPUT_EXPORT] = output_export,
517 [OUTPUT_JSON] = output_json,
518 [OUTPUT_CAT] = output_cat
521 int output_journal(sd_journal *j, OutputMode mode, unsigned line, bool show_all) {
523 assert(mode < _OUTPUT_MODE_MAX);
525 return output_funcs[mode](j, line, show_all);
528 int show_journal_by_unit(
543 bool need_seek = false;
546 assert(mode < _OUTPUT_MODE_MAX);
549 if (!endswith(unit, ".service") &&
550 !endswith(unit, ".socket") &&
551 !endswith(unit, ".mount") &&
552 !endswith(unit, ".swap"))
559 n_columns = columns();
564 if (asprintf(&m, "_SYSTEMD_UNIT=%s", unit) < 0) {
569 r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM_ONLY);
573 fd = sd_journal_get_fd(j);
577 r = sd_journal_add_match(j, m, strlen(m));
581 r = sd_journal_seek_tail(j);
585 r = sd_journal_previous_skip(j, how_many);
589 if (mode == OUTPUT_JSON) {
599 r = sd_journal_next(j);
609 if (not_before > 0) {
610 r = sd_journal_get_monotonic_usec(j, &usec, NULL);
612 /* -ESTALE is returned if the
613 timestamp is not from this boot */
619 if (usec < not_before)
625 r = output_journal(j, mode, line, show_all);
633 r = fd_wait_for_event(fd, POLLIN);
637 r = sd_journal_process(j);
643 if (mode == OUTPUT_JSON)
644 fputs("\n]\n", stdout);
656 static const char *const output_mode_table[_OUTPUT_MODE_MAX] = {
657 [OUTPUT_SHORT] = "short",
658 [OUTPUT_SHORT_MONOTONIC] = "short-monotonic",
659 [OUTPUT_VERBOSE] = "verbose",
660 [OUTPUT_EXPORT] = "export",
661 [OUTPUT_JSON] = "json",
665 DEFINE_STRING_TABLE_LOOKUP(output_mode, OutputMode);