Fix segfault when displaying usage for installed iphoneinfo and iphonesyslog

[#54 state:resolved]

Signed-off-by: Matt Colyer <matt@colyer.name>

1 files changed, 4 insertions, 1 deletions

diff --git a/dev/syslog_relay.c b/dev/syslog_relay.c
index e552e9c..6698653 100644
--- a/dev/syslog_relay.c
+++ b/dev/syslog_relay.c
@@ -154,7 +154,10 @@ int main(int argc, char *argv[])
 
 void print_usage(int argc, char **argv)
 {
-        printf("Usage: %s [OPTIONS]\n", (strrchr(argv[0], '/') + 1));
+        char *name = NULL;
+        
+        name = strrchr(argv[0], '/');
+        printf("Usage: %s [OPTIONS]\n", (name ? name + 1: argv[0]));
         printf("Relay syslog of a connected iPhone/iPod Touch.\n\n");
         printf("  -d, --debug\t\tenable communication debugging\n");
         printf("  -u, --uuid UUID\ttarget specific device by its 40-digit device UUID\n");