From 0a1750934f58d72682f5f8d441a249f5e6f22c24 Mon Sep 17 00:00:00 2001 From: Zbigniew Jędrzejewski-Szmek Date: Fri, 12 Aug 2016 00:34:45 -0400 Subject: journalctl: allow --root argument for journal watching It is useful to look at a (possibly inactive) container or other os tree with --root=/path/to/container. This is similar to specifying --directory=/path/to/container/var/log/journal --directory=/path/to/container/run/systemd/journal (if using --directory multiple times was allowed), but doesn't require as much typing. --- src/journal/journalctl.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'src') diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c index 6f841efb69..381e219390 100644 --- a/src/journal/journalctl.c +++ b/src/journal/journalctl.c @@ -310,7 +310,7 @@ static void help(void) { " -m --merge Show entries from all available journals\n" " -D --directory=PATH Show journal files from directory\n" " --file=PATH Show journal file\n" - " --root=ROOT Operate on catalog files below a root directory\n" + " --root=ROOT Operate on files below a root directory\n" #ifdef HAVE_GCRYPT " --interval=TIME Time interval for changing the FSS sealing key\n" " --verify-key=KEY Specify FSS verification key\n" @@ -848,8 +848,8 @@ static int parse_argv(int argc, char *argv[]) { if (arg_follow && !arg_no_tail && !arg_since && arg_lines == ARG_LINES_DEFAULT) arg_lines = 10; - if (!!arg_directory + !!arg_file + !!arg_machine > 1) { - log_error("Please specify either -D/--directory= or --file= or -M/--machine=, not more than one."); + if (!!arg_directory + !!arg_file + !!arg_machine + !!arg_root > 1) { + log_error("Please specify at most one of -D/--directory=, --file=, -M/--machine=, --root."); return -EINVAL; } @@ -1267,7 +1267,7 @@ static int add_boot(sd_journal *j) { * We can do this only when we logs are coming from the current machine, * so take the slow path if log location is specified. */ if (arg_boot_offset == 0 && sd_id128_is_null(arg_boot_id) && - !arg_directory && !arg_file) + !arg_directory && !arg_file && !arg_root) return add_match_this_boot(j, arg_machine); @@ -2161,6 +2161,8 @@ int main(int argc, char *argv[]) { if (arg_directory) r = sd_journal_open_directory(&j, arg_directory, arg_journal_type); + else if (arg_root) + r = sd_journal_open_directory(&j, arg_root, arg_journal_type | SD_JOURNAL_OS_ROOT); else if (arg_file_stdin) { int ifd = STDIN_FILENO; r = sd_journal_open_files_fd(&j, &ifd, 1, 0); -- cgit v1.2.3-54-g00ecf