static int journal_previous_skip (lua_State *L) {
sd_journal *j = check_journal(L, 1);
uint64_t skip = luaL_checkuint64(L, 2);
int err = sd_journal_previous_skip(j, skip);
if (err < 0) return handle_error(L, -err);
lua_pushinteger(L, err);
return 1;
}
static void test_skip(void (*setup)(void))
{
char t[] = "/tmp/journal-skip-XXXXXX";
sd_journal *j;
int r;
assert_se(mkdtemp(t));
assert_se(chdir(t) >= 0);
setup();
/* Seek to head, iterate down.
*/
assert_ret(sd_journal_open_directory(&j, t, 0));
assert_ret(sd_journal_seek_head(j));
assert_ret(sd_journal_next(j));
test_check_numbers_down(j, 4);
sd_journal_close(j);
/* Seek to tail, iterate up.
*/
assert_ret(sd_journal_open_directory(&j, t, 0));
assert_ret(sd_journal_seek_tail(j));
assert_ret(sd_journal_previous(j));
test_check_numbers_up(j, 4);
sd_journal_close(j);
/* Seek to tail, skip to head, iterate down.
*/
assert_ret(sd_journal_open_directory(&j, t, 0));
assert_ret(sd_journal_seek_tail(j));
assert_ret(r = sd_journal_previous_skip(j, 4));
assert_se(r == 4);
test_check_numbers_down(j, 4);
sd_journal_close(j);
/* Seek to head, skip to tail, iterate up.
*/
assert_ret(sd_journal_open_directory(&j, t, 0));
assert_ret(sd_journal_seek_head(j));
assert_ret(r = sd_journal_next_skip(j, 4));
assert_se(r == 4);
test_check_numbers_up(j, 4);
sd_journal_close(j);
log_info("Done...");
if (arg_keep)
log_info("Not removing %s", t);
else {
journal_directory_vacuum(".", 3000000, 0, 0, NULL);
assert_se(rm_rf_dangerous(t, false, true, false) >= 0);
}
puts("------------------------------------------------------------");
}
void
systemd_init(pmdaInterface *dp)
{
int sts;
int journal_fd;
dp->version.six.desc = systemd_desc;
dp->version.six.fetch = systemd_fetch;
dp->version.six.text = systemd_text;
dp->version.six.attribute = systemd_contextAttributeCallBack;
pmdaSetFetchCallBack(dp, systemd_fetchCallBack);
pmdaSetEndContextCallBack(dp, systemd_end_contextCallBack);
pmdaInit(dp, NULL, 0, metrictab, sizeof(metrictab)/sizeof(metrictab[0]));
/* Initialize the systemd side. This is failure-tolerant. */
/* XXX: SD_JOURNAL_{LOCAL|RUNTIME|SYSTEM}_ONLY */
sts = sd_journal_open(& journald_context, 0);
if (sts < 0) {
__pmNotifyErr(LOG_ERR, "sd_journal_open failure: %s",
strerror(-sts));
dp->status = sts;
return;
}
sts = sd_journal_open(& journald_context_seeky, 0);
if (sts < 0) {
__pmNotifyErr(LOG_ERR, "sd_journal_open #2 failure: %s",
strerror(-sts));
dp->status = sts;
return;
}
sts = sd_journal_seek_tail(journald_context);
if (sts < 0) {
__pmNotifyErr(LOG_ERR, "sd_journal_seek_tail failure: %s",
strerror(-sts));
}
/* Work around RHBZ979487. */
sts = sd_journal_previous_skip(journald_context, 1);
if (sts < 0) {
__pmNotifyErr(LOG_ERR, "sd_journal_previous_skip failure: %s",
strerror(-sts));
}
/* Arrange to wake up for journal events. */
journal_fd = sd_journal_get_fd(journald_context);
if (journal_fd < 0) {
__pmNotifyErr(LOG_ERR, "sd_journal_get_fd failure: %s",
strerror(-journal_fd));
/* NB: not a fatal error; the select() loop will still time out and
periodically poll. This makes it ok for sd_journal_reliable_fd()
to be 0. */
} else {
FD_SET(journal_fd, &fds);
if (journal_fd > maxfd) maxfd = journal_fd;
}
/* NB: One queue is used for both .records and .records_raw; they
just use different decoder callbacks. */
queue_entries = pmdaEventNewQueue("systemd", maxmem);
if (queue_entries < 0)
__pmNotifyErr(LOG_ERR, "pmdaEventNewQueue failure: %s",
pmErrStr(queue_entries));
}
int main(int argc, char *argv[]) {
int r;
sd_journal *j = NULL;
unsigned line = 0;
bool need_seek = false;
sd_id128_t previous_boot_id;
bool previous_boot_id_valid = false;
bool have_pager;
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r <= 0)
goto finish;
if (arg_new_id128) {
r = generate_new_id128();
goto finish;
}
#ifdef HAVE_ACL
if (!arg_quiet && geteuid() != 0 && in_group("adm") <= 0)
log_warning("Showing user generated messages only. Users in the group 'adm' can see all messages. Pass -q to turn this message off.");
#endif
if (arg_directory)
r = sd_journal_open_directory(&j, arg_directory, 0);
else
r = sd_journal_open(&j, arg_local ? SD_JOURNAL_LOCAL_ONLY : 0);
if (r < 0) {
log_error("Failed to open journal: %s", strerror(-r));
goto finish;
}
if (arg_print_header) {
journal_print_header(j);
r = 0;
goto finish;
}
r = add_this_boot(j);
if (r < 0)
goto finish;
r = add_matches(j, argv + optind);
if (r < 0)
goto finish;
if (!arg_quiet) {
usec_t start, end;
char start_buf[FORMAT_TIMESTAMP_MAX], end_buf[FORMAT_TIMESTAMP_MAX];
r = sd_journal_get_cutoff_realtime_usec(j, &start, &end);
if (r < 0) {
log_error("Failed to get cutoff: %s", strerror(-r));
goto finish;
}
if (r > 0) {
if (arg_follow)
printf("Logs begin at %s.\n", format_timestamp(start_buf, sizeof(start_buf), start));
else
printf("Logs begin at %s, end at %s.\n",
format_timestamp(start_buf, sizeof(start_buf), start),
format_timestamp(end_buf, sizeof(end_buf), end));
}
}
if (arg_lines >= 0) {
r = sd_journal_seek_tail(j);
if (r < 0) {
log_error("Failed to seek to tail: %s", strerror(-r));
goto finish;
}
r = sd_journal_previous_skip(j, arg_lines);
} else {
r = sd_journal_seek_head(j);
if (r < 0) {
log_error("Failed to seek to head: %s", strerror(-r));
goto finish;
}
r = sd_journal_next(j);
}
if (r < 0) {
log_error("Failed to iterate through journal: %s", strerror(-r));
goto finish;
}
have_pager = !arg_no_pager && !arg_follow;
if (have_pager) {
columns();
pager_open();
}
if (arg_output == OUTPUT_JSON) {
fputc('[', stdout);
fflush(stdout);
}
for (;;) {
for (;;) {
sd_id128_t boot_id;
int flags = (arg_show_all*OUTPUT_SHOW_ALL |
have_pager*OUTPUT_FULL_WIDTH);
if (need_seek) {
r = sd_journal_next(j);
if (r < 0) {
log_error("Failed to iterate through journal: %s", strerror(-r));
goto finish;
}
}
if (r == 0)
break;
r = sd_journal_get_monotonic_usec(j, NULL, &boot_id);
if (r >= 0) {
if (previous_boot_id_valid &&
!sd_id128_equal(boot_id, previous_boot_id))
printf(ANSI_HIGHLIGHT_ON "----- Reboot -----" ANSI_HIGHLIGHT_OFF "\n");
previous_boot_id = boot_id;
previous_boot_id_valid = true;
}
line ++;
r = output_journal(j, arg_output, line, 0, flags);
if (r < 0)
goto finish;
need_seek = true;
}
if (!arg_follow)
break;
r = sd_journal_wait(j, (uint64_t) -1);
if (r < 0) {
log_error("Couldn't wait for log event: %s", strerror(-r));
goto finish;
}
}
if (arg_output == OUTPUT_JSON)
fputs("\n]\n", stdout);
finish:
if (j)
sd_journal_close(j);
pager_close();
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}