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authorHarald Hoyer <harald@redhat.com>2014-08-19 11:27:34 +0200
committerHarald Hoyer <harald@redhat.com>2014-08-21 14:16:29 +0200
commit730836403aee5f5bb998e6e3622ea7068fce0699 (patch)
tree247df19cca0b6f9e083d7ef275bbaad0a24f36ab
parent9b364545435d2b65fcf73519b3064bb7c28093b7 (diff)
journalctl: add "-t --identifier=STRING" option
This turns journalctl to the counterpart of systemd-cat. Messages sent with systemd-cat --identifier foo --prioritiy debug can now be shown with journalctl --identifier foo --prioritiy debug "--identifier" is not merged with "--unit" to make a clear distinction between syslog and systemd units. syslog identifiers can be chosen freely by anyone.
-rw-r--r--man/journalctl.xml14
-rw-r--r--src/journal/journalctl.c43
2 files changed, 56 insertions, 1 deletions
diff --git a/man/journalctl.xml b/man/journalctl.xml
index e10918a9c6..d4e031619a 100644
--- a/man/journalctl.xml
+++ b/man/journalctl.xml
@@ -498,6 +498,20 @@
</varlistentry>
<varlistentry>
+ <term><option>-t</option></term>
+ <term><option>--identifier=<replaceable>SYSLOG_IDENTIFIER</replaceable>|<replaceable>PATTERN</replaceable></option></term>
+
+ <listitem><para>Show messages for the
+ specified syslog identifier
+ <replaceable>SYSLOG_IDENTIFIER</replaceable>, or
+ for any of the messages with a <literal>SYSLOG_IDENTIFIER</literal>
+ matched by <replaceable>PATTERN</replaceable>.</para>
+
+ <para>This parameter can be specified
+ multiple times.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
<term><option>-u</option></term>
<term><option>--unit=<replaceable>UNIT</replaceable>|<replaceable>PATTERN</replaceable></option></term>
diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c
index 5c4a71d618..f3680d1ce2 100644
--- a/src/journal/journalctl.c
+++ b/src/journal/journalctl.c
@@ -89,6 +89,7 @@ static bool arg_force = false;
#endif
static usec_t arg_since, arg_until;
static bool arg_since_set = false, arg_until_set = false;
+static char **arg_syslog_identifier = NULL;
static char **arg_system_units = NULL;
static char **arg_user_units = NULL;
static const char *arg_field = NULL;
@@ -180,6 +181,7 @@ static void help(void) {
" -k --dmesg Show kernel message log from the current boot\n"
" -u --unit=UNIT Show data only from the specified unit\n"
" --user-unit=UNIT Show data only from the specified user session unit\n"
+ " -t --identifier=STRING Show only messages with the specified syslog identifier\n"
" -p --priority=RANGE Show only messages within the specified priority range\n"
" -e --pager-end Immediately jump to end of the journal in the pager\n"
" -f --follow Follow the journal\n"
@@ -276,6 +278,7 @@ static int parse_argv(int argc, char *argv[]) {
{ "file", required_argument, NULL, ARG_FILE },
{ "root", required_argument, NULL, ARG_ROOT },
{ "header", no_argument, NULL, ARG_HEADER },
+ { "identifier", required_argument, NULL, 't' },
{ "priority", required_argument, NULL, 'p' },
{ "setup-keys", no_argument, NULL, ARG_SETUP_KEYS },
{ "interval", required_argument, NULL, ARG_INTERVAL },
@@ -304,7 +307,7 @@ static int parse_argv(int argc, char *argv[]) {
assert(argc >= 0);
assert(argv);
- while ((c = getopt_long(argc, argv, "hefo:aln::qmb::kD:p:c:u:F:xrM:", options, NULL)) >= 0)
+ while ((c = getopt_long(argc, argv, "hefo:aln::qmb::kD:p:c:t:u:F:xrM:", options, NULL)) >= 0)
switch (c) {
@@ -590,6 +593,12 @@ static int parse_argv(int argc, char *argv[]) {
arg_until_set = true;
break;
+ case 't':
+ r = strv_extend(&arg_syslog_identifier, optarg);
+ if (r < 0)
+ return log_oom();
+ break;
+
case 'u':
r = strv_extend(&arg_system_units, optarg);
if (r < 0)
@@ -1212,6 +1221,32 @@ static int add_priorities(sd_journal *j) {
return 0;
}
+
+static int add_syslog_identifier(sd_journal *j) {
+ int r;
+ char **i;
+
+ assert(j);
+
+ STRV_FOREACH(i, arg_syslog_identifier) {
+ char *u;
+
+ u = strappenda("SYSLOG_IDENTIFIER=", *i);
+ r = sd_journal_add_match(j, u, 0);
+ if (r < 0)
+ return r;
+ r = sd_journal_add_disjunction(j);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_journal_add_conjunction(j);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
static int setup_keys(void) {
#ifdef HAVE_GCRYPT
size_t mpk_size, seed_size, state_size, i;
@@ -1705,6 +1740,12 @@ int main(int argc, char *argv[]) {
return EXIT_FAILURE;
}
+ r = add_syslog_identifier(j);
+ if (r < 0) {
+ log_error("Failed to add filter for syslog identifiers: %s", strerror(-r));
+ return EXIT_FAILURE;
+ }
+
r = add_priorities(j);
if (r < 0) {
log_error("Failed to add filter for priorities: %s", strerror(-r));