rgb.c: if filename is too long, report error instead of truncating

Avoid possibly creating a file of unknown name/location

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/rgb.c b/rgb.c
index bf4d032..287dcd6 100644
--- a/rgb.c
+++ b/rgb.c
@@ -80,6 +80,13 @@ main(int argc, char **argv)
     else
 	dbname = RGB_DB;
 
+    if (strlen(dbname) > (sizeof(name) - 5)) {
+        fprintf (stderr,
+		 "%s:  dbm file name too long: \"%s\" (%lu max allowed)\n",
+		 ProgramName, dbname, sizeof(name) - 5);
+	exit (1);
+    }
+
     snprintf (name, sizeof(name), "%s.dir", dbname);
     fd = open (name, O_WRONLY|O_CREAT, 0666);
     if (fd < 0) {