From: Jon Steinhart <jon@fourwinds.com>
Date: Mon, 9 Sep 2002 14:30:16 +0000 (+0000)
Subject: New routine that provides interface to external programs.
X-Git-Tag: RELEASE_1_2~114
X-Git-Url: http://git.marmaro.de/?a=commitdiff_plain;h=d38818cda73ca94e1e62bdf30a0a024781a54cb5;p=mmh

New routine that provides interface to external programs.
---

diff --git a/sbr/ext_hook.c b/sbr/ext_hook.c
new file mode 100644
index 0000000..d228848
--- /dev/null
+++ b/sbr/ext_hook.c
@@ -0,0 +1,61 @@
+/*	$Id$
+ *
+ *	Run a program that hooks into some other system.  The first argument is
+ *	name of the hook to use, the second is the full path name of a mail message.
+ *	The third argument is also the full path name of a mail message, or a NULL
+ *	pointer if it isn't needed.  Look in the context for an error message if
+ *	something goes wrong; there is a built-in message in case one isn't specified.
+ *	Only produce the error message once.
+ */
+
+#include <h/mh.h>
+
+int
+ext_hook(char *hook_name, char *message_file_name_1, char *message_file_name_2)
+{
+    char	*hook;			/* hook program from context */
+    pid_t	pid;			/* ID of child process */
+    int		status;			/* exit or other child process status */
+    char	*vec[4];		/* argument vector for child process */
+
+    static  int	did_message = 0;	/* set if we've already output a message */
+
+    if ((hook = context_find(hook_name)) == (char *)0)
+	return (OK);
+
+    switch (pid = vfork()) {
+    case -1:
+	status = NOTOK;
+	advise(NULL, "external database may be out-of-date.");
+	break;
+
+    case 0:
+	vec[0] = r1bindex(hook, '/');
+	vec[1] = message_file_name_1;
+	vec[2] = message_file_name_2;
+	vec[3] = (char *)0;
+	execvp(hook, vec);
+	_exit(-1);
+	/* NOTREACHED */
+
+    default:
+	status = pidwait(pid, -1);
+	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);
+    }
+
+    else
+	return (OK);
+}