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))
61 buf = memdup((const char*) data + fl, nl);
63 log_error("Out of memory");
74 static bool shall_print(bool show_all, char *p, size_t l) {
78 if (l > PRINT_THRESHOLD)
81 if (contains_unprintable(p, l))
87 static int output_short(sd_journal *j, unsigned line, bool show_all, bool monotonic) {
92 char *hostname = NULL, *identifier = NULL, *comm = NULL, *pid = NULL, *fake_pid = NULL, *message = NULL;
93 size_t hostname_len = 0, identifier_len = 0, comm_len = 0, pid_len = 0, fake_pid_len = 0, message_len = 0;
97 SD_JOURNAL_FOREACH_DATA(j, data, length) {
99 r = parse_field(data, length, "_HOSTNAME=", &hostname, &hostname_len);
105 r = parse_field(data, length, "SYSLOG_IDENTIFIER=", &identifier, &identifier_len);
111 r = parse_field(data, length, "_COMM=", &comm, &comm_len);
117 r = parse_field(data, length, "_PID=", &pid, &pid_len);
123 r = parse_field(data, length, "SYSLOG_PID=", &fake_pid, &fake_pid_len);
129 r = parse_field(data, length, "MESSAGE=", &message, &message_len);
142 r = sd_journal_get_monotonic_usec(j, &t, NULL);
144 printf("[%5llu.%06llu]",
145 (unsigned long long) (t / USEC_PER_SEC),
146 (unsigned long long) (t % USEC_PER_SEC));
148 n += 1 + 5 + 1 + 6 + 1;
157 r = sd_journal_get_realtime_usec(j, &realtime);
159 log_error("Failed to get realtime: %s", strerror(-r));
163 t = (time_t) (realtime / USEC_PER_SEC);
164 if (strftime(buf, sizeof(buf), "%b %d %H:%M:%S", localtime_r(&t, &tm)) <= 0) {
165 log_error("Failed to format time.");
173 if (hostname && shall_print(show_all, hostname, hostname_len)) {
174 printf(" %.*s", (int) hostname_len, hostname);
175 n += hostname_len + 1;
178 if (identifier && shall_print(show_all, identifier, identifier_len)) {
179 printf(" %.*s", (int) identifier_len, identifier);
180 n += identifier_len + 1;
181 } else if (comm && shall_print(show_all, comm, comm_len)) {
182 printf(" %.*s", (int) comm_len, comm);
186 if (pid && shall_print(show_all, pid, pid_len)) {
187 printf("[%.*s]", (int) pid_len, pid);
189 } else if (fake_pid && shall_print(show_all, fake_pid, fake_pid_len)) {
190 printf("[%.*s]", (int) fake_pid_len, fake_pid);
191 n += fake_pid_len + 2;
195 printf(": %.*s\n", (int) message_len, message);
196 else if (contains_unprintable(message, message_len))
197 fputs(": [blob data]\n", stdout);
198 else if (message_len + n < columns())
199 printf(": %.*s\n", (int) message_len, message);
200 else if (n < columns()) {
203 e = ellipsize_mem(message, message_len, columns() - n - 2, 90);
206 printf(": %.*s\n", (int) message_len, message);
227 static int output_short_realtime(sd_journal *j, unsigned line, bool show_all) {
228 return output_short(j, line, show_all, false);
231 static int output_short_monotonic(sd_journal *j, unsigned line, bool show_all) {
232 return output_short(j, line, show_all, true);
235 static int output_verbose(sd_journal *j, unsigned line, bool show_all) {
240 char ts[FORMAT_TIMESTAMP_MAX];
245 r = sd_journal_get_realtime_usec(j, &realtime);
247 log_error("Failed to get realtime timestamp: %s", strerror(-r));
251 r = sd_journal_get_cursor(j, &cursor);
253 log_error("Failed to get cursor: %s", strerror(-r));
258 format_timestamp(ts, sizeof(ts), realtime),
263 SD_JOURNAL_FOREACH_DATA(j, data, length) {
264 if (!show_all && (length > PRINT_THRESHOLD ||
265 contains_unprintable(data, length))) {
268 c = memchr(data, '=', length);
270 log_error("Invalid field.");
274 printf("\t%.*s=[blob data]\n",
275 (int) (c - (const char*) data),
278 printf("\t%.*s\n", (int) length, (const char*) data);
284 static int output_export(sd_journal *j, unsigned line, bool show_all) {
288 usec_t realtime, monotonic;
295 r = sd_journal_get_realtime_usec(j, &realtime);
297 log_error("Failed to get realtime timestamp: %s", strerror(-r));
301 r = sd_journal_get_monotonic_usec(j, &monotonic, &boot_id);
303 log_error("Failed to get monotonic timestamp: %s", strerror(-r));
307 r = sd_journal_get_cursor(j, &cursor);
309 log_error("Failed to get cursor: %s", strerror(-r));
313 printf(".cursor=%s\n"
318 (unsigned long long) realtime,
319 (unsigned long long) monotonic,
320 sd_id128_to_string(boot_id, sid));
324 SD_JOURNAL_FOREACH_DATA(j, data, length) {
326 if (contains_unprintable(data, length)) {
330 c = memchr(data, '=', length);
332 log_error("Invalid field.");
336 fwrite(data, c - (const char*) data, 1, stdout);
338 le64 = htole64(length - (c - (const char*) data) - 1);
339 fwrite(&le64, sizeof(le64), 1, stdout);
340 fwrite(c + 1, length - (c - (const char*) data) - 1, 1, stdout);
342 fwrite(data, length, 1, stdout);
352 static void json_escape(const char* p, size_t l) {
354 if (contains_unprintable(p, l)) {
355 bool not_first = false;
361 printf(", %u", (uint8_t) *p);
364 printf("%u", (uint8_t) *p);
376 if (*p == '"' || *p == '\\') {
390 static int output_json(sd_journal *j, unsigned line, bool show_all) {
391 uint64_t realtime, monotonic;
401 r = sd_journal_get_realtime_usec(j, &realtime);
403 log_error("Failed to get realtime timestamp: %s", strerror(-r));
407 r = sd_journal_get_monotonic_usec(j, &monotonic, &boot_id);
409 log_error("Failed to get monotonic timestamp: %s", strerror(-r));
413 r = sd_journal_get_cursor(j, &cursor);
415 log_error("Failed to get cursor: %s", strerror(-r));
422 fputs(",\n", stdout);
425 "\t\".cursor\" : \"%s\",\n"
426 "\t\".realtime\" : %llu,\n"
427 "\t\".monotonic\" : %llu,\n"
428 "\t\".boot_id\" : \"%s\"",
430 (unsigned long long) realtime,
431 (unsigned long long) monotonic,
432 sd_id128_to_string(boot_id, sid));
436 SD_JOURNAL_FOREACH_DATA(j, data, length) {
439 c = memchr(data, '=', length);
441 log_error("Invalid field.");
445 fputs(",\n\t", stdout);
446 json_escape(data, c - (const char*) data);
447 fputs(" : ", stdout);
448 json_escape(c + 1, length - (c - (const char*) data) - 1);
451 fputs("\n}", stdout);
457 static int (*output_funcs[_OUTPUT_MODE_MAX])(sd_journal*j, unsigned line, bool show_all) = {
458 [OUTPUT_SHORT] = output_short_realtime,
459 [OUTPUT_SHORT_MONOTONIC] = output_short_monotonic,
460 [OUTPUT_VERBOSE] = output_verbose,
461 [OUTPUT_EXPORT] = output_export,
462 [OUTPUT_JSON] = output_json
465 int output_journal(sd_journal *j, OutputMode mode, unsigned line, bool show_all) {
467 assert(mode < _OUTPUT_MODE_MAX);
469 return output_funcs[mode](j, line, show_all);
472 int show_journal_by_unit(
487 bool need_seek = false;
490 assert(mode < _OUTPUT_MODE_MAX);
493 if (!endswith(unit, ".service") &&
494 !endswith(unit, ".socket") &&
495 !endswith(unit, ".mount") &&
496 !endswith(unit, ".swap"))
503 n_columns = columns();
508 if (asprintf(&m, "_SYSTEMD_UNIT=%s", unit) < 0) {
513 r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM_ONLY);
517 fd = sd_journal_get_fd(j);
521 r = sd_journal_add_match(j, m, strlen(m));
525 r = sd_journal_seek_tail(j);
529 r = sd_journal_previous_skip(j, how_many);
533 if (mode == OUTPUT_JSON) {
543 r = sd_journal_next(j);
553 if (not_before > 0) {
554 r = sd_journal_get_monotonic_usec(j, &usec, NULL);
556 /* -ESTALE is returned if the
557 timestamp is not from this boot */
563 if (usec < not_before)
569 r = output_journal(j, mode, line, show_all);
577 r = fd_wait_for_event(fd, POLLIN);
581 r = sd_journal_process(j);
587 if (mode == OUTPUT_JSON)
588 fputs("\n]\n", stdout);
600 static const char *const output_mode_table[_OUTPUT_MODE_MAX] = {
601 [OUTPUT_SHORT] = "short",
602 [OUTPUT_SHORT_MONOTONIC] = "short-monotonic",
603 [OUTPUT_VERBOSE] = "verbose",
604 [OUTPUT_EXPORT] = "export",
605 [OUTPUT_JSON] = "json"
608 DEFINE_STRING_TABLE_LOOKUP(output_mode, OutputMode);