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journalctl: show friendly info when using -b on runtime journal only

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Make it clear that specifing boot when there is actually only one has no
effect. This cosmetic patch improves user experience a bit.
This commit is contained in:
Jan Synacek 2016-02-01 09:25:22 +01:00
parent 39fd5b08a7
commit 0f1a9a830c
1 changed files with 7 additions and 0 deletions
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7
src/journal/journalctl.c
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@ -2091,6 +2091,13 @@ int main(int argc, char *argv[]) {
assert_not_reached("Unknown action");
}
if (arg_boot_offset != 0 &&
sd_journal_has_runtime_files(j) > 0 &&
sd_journal_has_persistent_files(j) == 0) {
log_info("Specifying boot ID has no effect, no persistent journal was found");
r = 0;
goto finish;
}
/* add_boot() must be called first!
* It may need to seek the journal to find parent boot IDs. */
r = add_boot(j);