Fix invalid pointer arithmetic.

[nmh] / sbr / ext_hook.c

diff --git a/sbr/ext_hook.c b/sbr/ext_hook.c
index 26f2c1c08d6b745fec482a9bf9d9bdc04b0c4fdf..ac88ac7bea59669251c6e086178a23e0fe395f28 100644 (file)
--- a/sbr/ext_hook.c
+++ b/sbr/ext_hook.c
@@ -22,13 +22,13 @@ ext_hook(char *hook_name, char *message_file_name_1, char *message_file_name_2)
 
     static  int        did_message = 0;        /* set if we've already output a message */
 
-    if ((hook = context_find(hook_name)) == (char *)0)
-       return (OK);
+    if ((hook = context_find(hook_name)) == NULL)
+       return OK;
 
     switch (pid = fork()) {
     case -1:
        status = NOTOK;
-       advise(NULL, "external database may be out-of-date.");
+       inform("external database may be out-of-date.");
        break;
 
     case 0:
@@ -37,7 +37,8 @@ ext_hook(char *hook_name, char *message_file_name_1, char *message_file_name_2)
        vec[vecp++] = message_file_name_2;
        vec[vecp++] = NULL;
        execvp(program, vec);
-       _exit(-1);
+       advise(program, "Unable to execute");
+       _exit(1);
        /* NOTREACHED */
 
     default:
@@ -45,19 +46,20 @@ ext_hook(char *hook_name, char *message_file_name_1, char *message_file_name_2)
        break;
     }
 
-    if (status != OK) {
-       if (did_message == 0) {
-           if ((hook = context_find("msg-hook")) != (char *)0)
-               advise(NULL, hook);
-           else
-               advise(NULL, "external hook (%s) did not work properly.", hook);
-       
-           did_message = 1;
-       }
-
-       return (NOTOK);
+    if (status == OK)
+       return OK;
+
+    if (did_message == 0) {
+        char *msghook;
+        if ((msghook = context_find("msg-hook")) != NULL)
+            inform("%s", msghook);
+        else {
+            char errbuf[BUFSIZ];
+            snprintf(errbuf, sizeof(errbuf), "external hook \"%s\"", hook);
+            pidstatus(status, stderr, errbuf);
+        }
+        did_message = 1;
     }
 
-    else
-       return (OK);
+    return NOTOK;
 }