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journalctl: support -b all to negate effect of -b

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Also fix an issue where -b without argument didn't always behave as -b0
This commit is contained in:
dana 2019-03-06 19:20:06 -06:00 committed by Zbigniew Jędrzejewski-Szmek
parent b5587fa994
commit 4890482531
3 changed files with 41 additions and 17 deletions
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8
man/journalctl.xml
View File

@ -461,8 +461,8 @@
</varlistentry>
<varlistentry>
<term><option>-b <optional><replaceable>ID</replaceable></optional><optional><replaceable>±offset</replaceable></optional></option></term>
<term><option>--boot=<optional><replaceable>ID</replaceable></optional><optional><replaceable>±offset</replaceable></optional></option></term>
<term><option>-b <optional><optional><replaceable>ID</replaceable></optional><optional><replaceable>±offset</replaceable></optional>|<constant>all</constant></optional></option></term>
<term><option>--boot<optional>=<optional><replaceable>ID</replaceable></optional><optional><replaceable>±offset</replaceable></optional>|<constant>all</constant></optional></option></term>
<listitem><para>Show messages from a specific boot. This will
add a match for <literal>_BOOT_ID=</literal>.</para>
@ -494,6 +494,10 @@
<replaceable>offset</replaceable> is not specified, a value of
zero is assumed, and the logs for the boot given by
<replaceable>ID</replaceable> are shown.</para>
<para>The special argument <constant>all</constant> can be
used to negate the effect of an earlier use of
<option>-b</option>.</para>
</listitem>
</varlistentry>

30
src/journal/journalctl.c
View File

@ -266,7 +266,11 @@ static int parse_boot_descriptor(const char *x, sd_id128_t *boot_id, int *offset
sd_id128_t id = SD_ID128_NULL;
int off = 0, r;
if (strlen(x) >= 32) {
if (streq(x, "all")) {
*boot_id = SD_ID128_NULL;
*offset = 0;
return 0;
} else if (strlen(x) >= 32) {
char *t;
t = strndupa(x, 32);
@ -294,7 +298,7 @@ static int parse_boot_descriptor(const char *x, sd_id128_t *boot_id, int *offset
if (offset)
*offset = off;
return 0;
return 1;
}
static int help(void) {
@ -593,30 +597,34 @@ static int parse_argv(int argc, char *argv[]) {
case ARG_THIS_BOOT:
arg_boot = true;
arg_boot_id = SD_ID128_NULL;
arg_boot_offset = 0;
break;
case 'b':
arg_boot = true;
arg_boot_id = SD_ID128_NULL;
arg_boot_offset = 0;
if (optarg) {
r = parse_boot_descriptor(optarg, &arg_boot_id, &arg_boot_offset);
if (r < 0) {
log_error("Failed to parse boot descriptor '%s'", optarg);
return -EINVAL;
}
} else {
if (r < 0)
return log_error_errno(r, "Failed to parse boot descriptor '%s'", optarg);
arg_boot = r;
/* Hmm, no argument? Maybe the next
* word on the command line is
* supposed to be the argument? Let's
* see if there is one and is parsable
* as a boot descriptor... */
if (optind < argc &&
parse_boot_descriptor(argv[optind], &arg_boot_id, &arg_boot_offset) >= 0)
} else if (optind < argc) {
r = parse_boot_descriptor(argv[optind], &arg_boot_id, &arg_boot_offset);
if (r >= 0) {
arg_boot = r;
optind++;
}
}
break;
case ARG_LIST_BOOTS:

12
test/TEST-04-JOURNAL/test-journal.sh
View File

@ -63,6 +63,18 @@ grep -q '^PRIORITY=6$' /output
! grep -q '^FOO=' /output
! grep -q '^SYSLOG_FACILITY=' /output
# `-b all` negates earlier use of -b (-b and -m are otherwise exclusive)
journalctl -b -1 -b all -m > /dev/null
# -b always behaves like -b0
journalctl -q -b-1 -b0 | head -1 > /expected
journalctl -q -b-1 -b | head -1 > /output
cmp /expected /output
# ... even when another option follows (both of these should fail due to -m)
{ journalctl -ball -b0 -m 2>&1 || :; } | head -1 > /expected
{ journalctl -ball -b -m 2>&1 || :; } | head -1 > /output
cmp /expected /output
# Don't lose streams on restart
systemctl start forever-print-hola
sleep 3