irmd: Add option to print version

This adds the --version option to the IRMd. With this option it will
print the version of Ouroboros to stdout and exit. Checking the
version does not require root privileges.

Also fixes calling log functions before log_init() and after
log_fini().

1 files changed, 16 insertions, 9 deletions

diff --git a/src/irmd/main.c b/src/irmd/main.c
index 84c55e93..99a34af2 100644
--- a/src/irmd/main.c
+++ b/src/irmd/main.c
@@ -2272,8 +2272,10 @@ static int irm_init(void)
 
 static void usage(void)
 {
-        log_err("Usage: irmd \n\n"
-                 "         [--stdout (Print to stdout instead of logs)]\n");
+        printf("Usage: irmd \n"
+               "         [--stdout  (Log to stdout instead of system log)]\n"
+               "         [--version (Print version number and exit)]\n"
+               "\n");
 }
 
 int main(int     argc,
@@ -2289,11 +2291,6 @@ int main(int     argc,
         sigaddset(&sigset, SIGHUP);
         sigaddset(&sigset, SIGPIPE);
 
-        if (geteuid() != 0) {
-                log_err("IPC Resource Manager must be run as root.");
-                exit(EXIT_FAILURE);
-        }
-
         argc--;
         argv++;
         while (argc > 0) {
@@ -2301,12 +2298,22 @@ int main(int     argc,
                         use_stdout = true;
                         argc--;
                         argv++;
+                } else if (strcmp(*argv, "--version") == 0) {
+                        printf("Ouroboros version %d.%d\n",
+                               OUROBOROS_VERSION_MAJOR,
+                               OUROBOROS_VERSION_MINOR);
+                        exit(EXIT_SUCCESS);
                 } else {
                         usage();
                         exit(EXIT_FAILURE);
                 }
         }
 
+        if (geteuid() != 0) {
+                printf("IPC Resource Manager must be run as root.\n");
+                exit(EXIT_FAILURE);
+        }
+
         /* Init sig_act. */
         memset(&sig_act, 0, sizeof sig_act);
 
@@ -2369,10 +2376,10 @@ int main(int     argc,
 
         pthread_sigmask(SIG_UNBLOCK, &sigset, NULL);
 
-        log_fini();
-
         log_info("Bye.");
 
+        log_fini();
+
         exit(EXIT_SUCCESS);
 
  fail_acceptor: