journal: add call to determine current journal file disk usage

[elogind.git] / src / journal / journalctl.c

diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c
index 1a6464d5e7ac9d72864524149910517b1409c39f..e2600542fc74caf5b2dc4dab0062f485ff713f63 100644 (file)
--- a/src/journal/journalctl.c
+++ b/src/journal/journalctl.c
@@ -72,7 +72,8 @@ static enum {
         ACTION_NEW_ID128,
         ACTION_PRINT_HEADER,
         ACTION_SETUP_KEYS,
-        ACTION_VERIFY
+        ACTION_VERIFY,
+        ACTION_DISK_USAGE,
 } arg_action = ACTION_SHOW;
 
 static int help(void) {
@@ -96,6 +97,7 @@ static int help(void) {
                "Commands:\n"
                "     --new-id128         Generate a new 128 Bit ID\n"
                "     --header            Show journal header information\n"
+               "     --disk-usage        Show total disk usage\n"
 #ifdef HAVE_GCRYPT
                "     --setup-keys        Generate new FSS key pair\n"
                "       --interval=TIME   Time interval for changing the FSS sealing key\n"
@@ -118,7 +120,8 @@ static int parse_argv(int argc, char *argv[]) {
                 ARG_SETUP_KEYS,
                 ARG_INTERVAL,
                 ARG_VERIFY,
-                ARG_VERIFY_KEY
+                ARG_VERIFY_KEY,
+                ARG_DISK_USAGE
         };
 
         static const struct option options[] = {
@@ -141,6 +144,7 @@ static int parse_argv(int argc, char *argv[]) {
                 { "interval",     required_argument, NULL, ARG_INTERVAL     },
                 { "verify",       no_argument,       NULL, ARG_VERIFY       },
                 { "verify-key",   required_argument, NULL, ARG_VERIFY_KEY   },
+                { "disk-usage",   no_argument,       NULL, ARG_DISK_USAGE   },
                 { NULL,           0,                 NULL, 0                }
         };
 
@@ -224,6 +228,10 @@ static int parse_argv(int argc, char *argv[]) {
                         arg_action = ACTION_VERIFY;
                         break;
 
+                case ARG_DISK_USAGE:
+                        arg_action = ACTION_DISK_USAGE;
+                        break;
+
 #ifdef HAVE_GCRYPT
                 case ARG_SETUP_KEYS:
                         arg_action = ACTION_SETUP_KEYS;
@@ -746,6 +754,19 @@ int main(int argc, char *argv[]) {
                 goto finish;
         }
 
+        if (arg_action == ACTION_DISK_USAGE) {
+                uint64_t bytes;
+                char sbytes[FORMAT_BYTES_MAX];
+
+                r = sd_journal_get_usage(j, &bytes);
+                if (r < 0)
+                        goto finish;
+
+                printf("Journals take up %s on disk.\n", format_bytes(sbytes, sizeof(sbytes), bytes));
+                r = 0;
+                goto finish;
+        }
+
 #ifdef HAVE_ACL
         if (access("/var/log/journal", F_OK) < 0 && geteuid() != 0 && in_group("adm") <= 0) {
                 log_error("Unprivileged users can't see messages unless persistent log storage is enabled. Users in the group 'adm' can always see messages.");