Make command argument optional

2 files changed, 18 insertions, 5 deletions

diff --git a/src/randsleep.1 b/src/randsleep.1
index 41d2fac..d051b73 100644
--- a/src/randsleep.1
+++ b/src/randsleep.1
@@ -12,7 +12,8 @@
 .Sh SYNOPSIS
 .
 .Nm
-.Ar time command args ...
+.Ar time
+.Op Ar command args ...
 .
 .
 .Sh VERSION
@@ -32,6 +33,14 @@ after sleeping for up to
 seconds.
 It is intended for use in cronjobs and similar.
 .
+.Pp
+.
+If
+.Ar command
+is not specified,
+.Nm
+will simply return after sleeping.
+.
 .
 .Sh RATIONALE
 .
diff --git a/src/randsleep.c b/src/randsleep.c
index 389e3a7..ea9c588 100644
--- a/src/randsleep.c
+++ b/src/randsleep.c
@@ -7,8 +7,8 @@ int main (int argc, char **argv) {
 	long maxsleep;
 	struct timespec ntime;
 
-	if (argc <= 2) {
-		fputs("Usage: randsleep <max> <cmd>\n", stdout);
+	if (argc < 2) {
+		fputs("Usage: randsleep <max> [<cmd>]\n", stdout);
 		return 1;
 	}
 
@@ -21,6 +21,10 @@ int main (int argc, char **argv) {
 
 	sleep(rand() % maxsleep);
 
-	execvp(argv[2], argv + 2);
-	perror("execvp");
+	if (argc > 2) {
+		execvp(argv[2], argv + 2);
+		perror("execvp");
+	}
+
+	return 0;
 }