diff options
Diffstat (limited to 'src/journal/journalctl.c')
| -rw-r--r-- | src/journal/journalctl.c | 106 |
1 files changed, 98 insertions, 8 deletions
diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c index 277adba904..071349666c 100644 --- a/src/journal/journalctl.c +++ b/src/journal/journalctl.c @@ -135,6 +135,7 @@ static enum { ACTION_FLUSH, ACTION_ROTATE, ACTION_VACUUM, + ACTION_SYNC, } arg_action = ACTION_SHOW; typedef struct BootId { @@ -201,7 +202,7 @@ static void help(void) { printf("%s [OPTIONS...] [MATCHES...]\n\n" "Query the journal.\n\n" - "Flags:\n" + "Options:\n" " --system Show the system journal\n" " --user Show the user journal for the current user\n" " -M --machine=CONTAINER Operate on local container\n" @@ -234,7 +235,7 @@ 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 underneath the root ROOT\n" + " --root=ROOT Operate on catalog 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" @@ -244,20 +245,21 @@ static void help(void) { " -h --help Show this help text\n" " --version Show package version\n" " -F --field=FIELD List all values that a specified field takes\n" - " --new-id128 Generate a new 128-bit ID\n" " --disk-usage Show total disk usage of all journal files\n" " --vacuum-size=BYTES Reduce disk usage below specified size\n" " --vacuum-files=INT Leave only the specified number of journal files\n" " --vacuum-time=TIME Remove journal files older than specified time\n" + " --verify Verify journal file consistency\n" + " --sync Synchronize unwritten journal messages to disk\n" " --flush Flush all journal data from /run into /var\n" " --rotate Request immediate rotation of the journal files\n" " --header Show journal header information\n" " --list-catalog Show all message IDs in the catalog\n" " --dump-catalog Show entries in the message catalog\n" " --update-catalog Update the message catalog database\n" + " --new-id128 Generate a new 128-bit ID\n" #ifdef HAVE_GCRYPT " --setup-keys Generate a new FSS key pair\n" - " --verify Verify journal file consistency\n" #endif , program_invocation_short_name); } @@ -289,6 +291,7 @@ static int parse_argv(int argc, char *argv[]) { ARG_UPDATE_CATALOG, ARG_FORCE, ARG_UTC, + ARG_SYNC, ARG_FLUSH, ARG_ROTATE, ARG_VACUUM_SIZE, @@ -345,6 +348,7 @@ static int parse_argv(int argc, char *argv[]) { { "machine", required_argument, NULL, 'M' }, { "utc", no_argument, NULL, ARG_UTC }, { "flush", no_argument, NULL, ARG_FLUSH }, + { "sync", no_argument, NULL, ARG_SYNC }, { "rotate", no_argument, NULL, ARG_ROTATE }, { "vacuum-size", required_argument, NULL, ARG_VACUUM_SIZE }, { "vacuum-files", required_argument, NULL, ARG_VACUUM_FILES }, @@ -729,6 +733,10 @@ static int parse_argv(int argc, char *argv[]) { arg_action = ACTION_ROTATE; break; + case ARG_SYNC: + arg_action = ACTION_SYNC; + break; + case '?': return -EINVAL; @@ -1782,10 +1790,8 @@ static int flush_to_var(void) { &error, NULL, "ssi", "systemd-journald.service", "main", SIGUSR1); - if (r < 0) { - log_error("Failed to kill journal service: %s", bus_error_message(&error, r)); - return r; - } + if (r < 0) + return log_error_errno(r, "Failed to kill journal service: %s", bus_error_message(&error, r)); mkdir_p("/run/systemd/journal", 0755); @@ -1840,6 +1846,85 @@ static int rotate(void) { return 0; } +static int sync_journal(void) { + _cleanup_bus_flush_close_unref_ sd_bus *bus = NULL; + _cleanup_close_ int watch_fd = -1; + usec_t start; + int r; + + start = now(CLOCK_REALTIME); + + /* Let's watch /run/systemd/sync until it's mtime is above + * the time we started the sync. Let's enqueue SIGRTMIN+1 to + * start the sync. */ + + for (;;) { + struct stat st; + + /* See if a sync happened by now. */ + if (stat("/run/systemd/journal/synced", &st) < 0) { + if (errno != ENOENT) + return log_error_errno(errno, "Failed to stat /run/systemd/journal/synced: %m"); + } else { + if (timespec_load(&st.st_mtim) >= start) + return 0; + } + + /* Let's ask for a sync, but only once. */ + if (!bus) { + _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; + + r = bus_connect_system_systemd(&bus); + if (r < 0) + return log_error_errno(r, "Failed to get D-Bus connection: %m"); + + r = sd_bus_call_method( + bus, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.systemd1.Manager", + "KillUnit", + &error, + NULL, + "ssi", "systemd-journald.service", "main", SIGRTMIN+1); + if (r < 0) + return log_error_errno(r, "Failed to kill journal service: %s", bus_error_message(&error, r)); + + continue; + } + + /* Let's install the inotify watch, if we didn't do that yet. */ + if (watch_fd < 0) { + + mkdir_p("/run/systemd/journal", 0755); + + watch_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); + if (watch_fd < 0) + return log_error_errno(errno, "Failed to create inotify watch: %m"); + + r = inotify_add_watch(watch_fd, "/run/systemd/journal", IN_CREATE|IN_ATTRIB|IN_DONT_FOLLOW|IN_ONLYDIR); + if (r < 0) + return log_error_errno(errno, "Failed to watch journal directory: %m"); + + /* Recheck the flag file immediately, so that we don't miss any event since the last check. */ + continue; + } + + /* OK, all preparatory steps done, let's wait until + * inotify reports an event. */ + + r = fd_wait_for_event(watch_fd, POLLIN, USEC_INFINITY); + if (r < 0) + return log_error_errno(r, "Failed to wait for event: %m"); + + r = flush_fd(watch_fd); + if (r < 0) + return log_error_errno(r, "Failed to flush inotify events: %m"); + } + + return 0; +} + int main(int argc, char *argv[]) { int r; _cleanup_journal_close_ sd_journal *j = NULL; @@ -1875,6 +1960,11 @@ int main(int argc, char *argv[]) { goto finish; } + if (arg_action == ACTION_SYNC) { + r = sync_journal(); + goto finish; + } + if (arg_action == ACTION_ROTATE) { r = rotate(); goto finish; |