fix possible buffer underrun by 1

diff --git a/citadel/control.c b/citadel/control.c
index 242cac8163cf97c247c5ebeff6e3b2d14bbd4967..2e5bf43c876aa27896ad9da9b87d4b4f7240905c 100644 (file)
--- a/citadel/control.c
+++ b/citadel/control.c
@@ -686,9 +686,12 @@ void cmd_conf(char *argbuf)
                extract_token(confname, argbuf, 1, '|', sizeof confname);
                confptr = CtdlGetSysConfig(confname);
                if (confptr != NULL) {
+                       long len; 
+
+                       len = strlen(confptr);
                        cprintf("%d %s\n", LISTING_FOLLOWS, confname);
-                       client_write(confptr, strlen(confptr));
-                       if (confptr[strlen(confptr) - 1] != 10)
+                       client_write(confptr, len);
+                       if ((len > 0) && (confptr[len - 1] != 10))
                                client_write("\n", 1);
                        cprintf("000\n");
                        free(confptr);