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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2011 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <fcntl.h>
#include <errno.h>
#include <stddef.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/poll.h>
#include "sd-journal.h"
#include "log.h"
static bool arg_follow = true;
int main(int argc, char *argv[]) {
int r, i, fd;
sd_journal *j = NULL;
log_set_max_level(LOG_DEBUG);
log_set_target(LOG_TARGET_CONSOLE);
log_parse_environment();
log_open();
r = sd_journal_open(&j);
if (r < 0) {
log_error("Failed to open journal: %s", strerror(-r));
goto finish;
}
for (i = 1; i < argc; i++) {
r = sd_journal_add_match(j, argv[i], strlen(argv[i]));
if (r < 0) {
log_error("Failed to add match: %s", strerror(-r));
goto finish;
}
}
fd = sd_journal_get_fd(j);
if (fd < 0) {
log_error("Failed to get wakeup fd: %s", strerror(-fd));
goto finish;
}
r = sd_journal_seek_head(j);
if (r < 0) {
log_error("Failed to seek to head: %s", strerror(-r));
goto finish;
}
for (;;) {
struct pollfd pollfd;
while (sd_journal_next(j) > 0) {
const void *data;
size_t length;
char *cursor;
uint64_t realtime = 0, monotonic = 0;
r = sd_journal_get_cursor(j, &cursor);
if (r < 0) {
log_error("Failed to get cursor: %s", strerror(-r));
goto finish;
}
printf("entry: %s\n", cursor);
free(cursor);
sd_journal_get_realtime_usec(j, &realtime);
sd_journal_get_monotonic_usec(j, &monotonic, NULL);
printf("realtime: %llu\n"
"monotonic: %llu\n",
(unsigned long long) realtime,
(unsigned long long) monotonic);
SD_JOURNAL_FOREACH_DATA(j, data, length)
printf("\t%.*s\n", (int) length, (const char*) data);
}
if (!arg_follow)
break;
zero(pollfd);
pollfd.fd = fd;
pollfd.events = POLLIN;
if (poll(&pollfd, 1, -1) < 0) {
if (errno == EINTR)
break;
log_error("poll(): %m");
r = -errno;
goto finish;
}
r = sd_journal_process(j);
if (r < 0) {
log_error("Failed to process: %s", strerror(-r));
goto finish;
}
}
finish:
if (j)
sd_journal_close(j);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
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