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, unsigned n_columns, 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 char bytes[FORMAT_BYTES_MAX];
230 printf(": [%s blob data]\n", format_bytes(bytes, sizeof(bytes), message_len));
231 } else if (message_len + n < n_columns)
232 printf(": %.*s\n", (int) message_len, message);
233 else if (n < n_columns) {
236 e = ellipsize_mem(message, message_len, n_columns - n - 2, 90);
239 printf(": %.*s\n", (int) message_len, message);
262 static int output_short_realtime(sd_journal *j, unsigned line, unsigned n_columns, bool show_all) {
263 return output_short(j, line, n_columns, show_all, false);
266 static int output_short_monotonic(sd_journal *j, unsigned line, unsigned n_columns, bool show_all) {
267 return output_short(j, line, n_columns, show_all, true);
270 static int output_verbose(sd_journal *j, unsigned line, unsigned n_columns, bool show_all) {
275 char ts[FORMAT_TIMESTAMP_MAX];
280 r = sd_journal_get_realtime_usec(j, &realtime);
282 log_error("Failed to get realtime timestamp: %s", strerror(-r));
286 r = sd_journal_get_cursor(j, &cursor);
288 log_error("Failed to get cursor: %s", strerror(-r));
293 format_timestamp(ts, sizeof(ts), realtime),
298 SD_JOURNAL_FOREACH_DATA(j, data, length) {
299 if (!show_all && (length > PRINT_THRESHOLD ||
300 contains_unprintable(data, length))) {
302 char bytes[FORMAT_BYTES_MAX];
304 c = memchr(data, '=', length);
306 log_error("Invalid field.");
310 printf("\t%.*s=[%s blob data]\n",
311 (int) (c - (const char*) data),
313 format_bytes(bytes, sizeof(bytes), length - (c - (const char *) data) - 1));
315 printf("\t%.*s\n", (int) length, (const char*) data);
321 static int output_export(sd_journal *j, unsigned line, unsigned n_columns, bool show_all) {
325 usec_t realtime, monotonic;
332 r = sd_journal_get_realtime_usec(j, &realtime);
334 log_error("Failed to get realtime timestamp: %s", strerror(-r));
338 r = sd_journal_get_monotonic_usec(j, &monotonic, &boot_id);
340 log_error("Failed to get monotonic timestamp: %s", strerror(-r));
344 r = sd_journal_get_cursor(j, &cursor);
346 log_error("Failed to get cursor: %s", strerror(-r));
350 printf(".cursor=%s\n"
355 (unsigned long long) realtime,
356 (unsigned long long) monotonic,
357 sd_id128_to_string(boot_id, sid));
361 SD_JOURNAL_FOREACH_DATA(j, data, length) {
363 if (contains_unprintable(data, length)) {
367 c = memchr(data, '=', length);
369 log_error("Invalid field.");
373 fwrite(data, c - (const char*) data, 1, stdout);
375 le64 = htole64(length - (c - (const char*) data) - 1);
376 fwrite(&le64, sizeof(le64), 1, stdout);
377 fwrite(c + 1, length - (c - (const char*) data) - 1, 1, stdout);
379 fwrite(data, length, 1, stdout);
389 static void json_escape(const char* p, size_t l) {
391 if (contains_unprintable(p, l)) {
392 bool not_first = false;
398 printf(", %u", (uint8_t) *p);
401 printf("%u", (uint8_t) *p);
413 if (*p == '"' || *p == '\\') {
427 static int output_json(sd_journal *j, unsigned line, unsigned n_columns, bool show_all) {
428 uint64_t realtime, monotonic;
438 r = sd_journal_get_realtime_usec(j, &realtime);
440 log_error("Failed to get realtime timestamp: %s", strerror(-r));
444 r = sd_journal_get_monotonic_usec(j, &monotonic, &boot_id);
446 log_error("Failed to get monotonic timestamp: %s", strerror(-r));
450 r = sd_journal_get_cursor(j, &cursor);
452 log_error("Failed to get cursor: %s", strerror(-r));
459 fputs(",\n", stdout);
462 "\t\".cursor\" : \"%s\",\n"
463 "\t\".realtime\" : %llu,\n"
464 "\t\".monotonic\" : %llu,\n"
465 "\t\".boot_id\" : \"%s\"",
467 (unsigned long long) realtime,
468 (unsigned long long) monotonic,
469 sd_id128_to_string(boot_id, sid));
473 SD_JOURNAL_FOREACH_DATA(j, data, length) {
476 c = memchr(data, '=', length);
478 log_error("Invalid field.");
482 fputs(",\n\t", stdout);
483 json_escape(data, c - (const char*) data);
484 fputs(" : ", stdout);
485 json_escape(c + 1, length - (c - (const char*) data) - 1);
488 fputs("\n}", stdout);
494 static int output_cat(sd_journal *j, unsigned line, unsigned n_columns, bool show_all) {
501 r = sd_journal_get_data(j, "MESSAGE", &data, &l);
503 log_error("Failed to get data: %s", strerror(-r));
509 fwrite((const char*) data + 8, 1, l - 8, stdout);
515 static int (*output_funcs[_OUTPUT_MODE_MAX])(sd_journal*j, unsigned line, unsigned n_columns, bool show_all) = {
516 [OUTPUT_SHORT] = output_short_realtime,
517 [OUTPUT_SHORT_MONOTONIC] = output_short_monotonic,
518 [OUTPUT_VERBOSE] = output_verbose,
519 [OUTPUT_EXPORT] = output_export,
520 [OUTPUT_JSON] = output_json,
521 [OUTPUT_CAT] = output_cat
524 int output_journal(sd_journal *j, OutputMode mode, unsigned line, unsigned n_columns, bool show_all) {
526 assert(mode < _OUTPUT_MODE_MAX);
529 n_columns = columns();
531 return output_funcs[mode](j, line, n_columns, show_all);
534 int show_journal_by_unit(
548 bool need_seek = false;
551 assert(mode < _OUTPUT_MODE_MAX);
554 if (!endswith(unit, ".service") &&
555 !endswith(unit, ".socket") &&
556 !endswith(unit, ".mount") &&
557 !endswith(unit, ".swap"))
563 if (asprintf(&m, "_SYSTEMD_UNIT=%s", unit) < 0) {
568 r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM_ONLY);
572 fd = sd_journal_get_fd(j);
576 r = sd_journal_add_match(j, m, strlen(m));
580 r = sd_journal_seek_tail(j);
584 r = sd_journal_previous_skip(j, how_many);
588 if (mode == OUTPUT_JSON) {
598 r = sd_journal_next(j);
608 if (not_before > 0) {
609 r = sd_journal_get_monotonic_usec(j, &usec, NULL);
611 /* -ESTALE is returned if the
612 timestamp is not from this boot */
618 if (usec < not_before)
624 r = output_journal(j, mode, line, n_columns, show_all);
632 r = fd_wait_for_event(fd, POLLIN, (usec_t) -1);
636 r = sd_journal_process(j);
642 if (mode == OUTPUT_JSON)
643 fputs("\n]\n", stdout);
655 static const char *const output_mode_table[_OUTPUT_MODE_MAX] = {
656 [OUTPUT_SHORT] = "short",
657 [OUTPUT_SHORT_MONOTONIC] = "short-monotonic",
658 [OUTPUT_VERBOSE] = "verbose",
659 [OUTPUT_EXPORT] = "export",
660 [OUTPUT_JSON] = "json",
664 DEFINE_STRING_TABLE_LOOKUP(output_mode, OutputMode);