From: Bruce Guenter <bguenter-djb-qmail@qcc.sk.ca>
To: qmail@list.cr.yp.to
Subject: QMAILQUEUE patch for qmail-1.03
Date: Mon, 25 Jan 1999 15:37:21 -0600

Greetings.

Appended is a patch to qmail-1.03 that causes any program that would run
qmail-queue to look for an environment variable QMAILQUEUE.  If it is
present, it is used in place of the string "bin/qmail-queue" when
running qmail-queue.  This could be used, for example, to add a program
into the qmail-smtpd->qmail-queue pipeline that could do filtering,
rewrite broken headers, etc. (this is my planned usage for it).

This has undergone virtually no testing, but it looks so simple that it
almost has to be correct.  No warranties, etc.  Note that the chdir to
/var/qmail is always done before exec'ing the program.

Does this look like a reasonable thing to do?
-- 
Bruce Guenter, QCC Communications Corp.  EMail: bruce.guenter@qcc.sk.ca
Phone: (306)249-0220               WWW: http://www.qcc.sk.ca/~bguenter/

diff -u qmail-1.03-orig/Makefile qmail-1.03/Makefile
--- qmail-1.03-orig/Makefile	Mon Jun 15 04:53:16 1998
+++ qmail-1.03/Makefile	Tue Jan 19 10:52:24 1999
@@ -1483,12 +1483,12 @@
 trigger.o fmtqfn.o quote.o now.o readsubdir.o qmail.o date822fmt.o \
 datetime.a case.a ndelay.a getln.a wait.a seek.a fd.a sig.a open.a \
 lock.a stralloc.a alloc.a substdio.a error.a str.a fs.a auto_qmail.o \
-auto_split.o
+auto_split.o env.a
 	./load qmail-send qsutil.o control.o constmap.o newfield.o \
 	prioq.o trigger.o fmtqfn.o quote.o now.o readsubdir.o \
 	qmail.o date822fmt.o datetime.a case.a ndelay.a getln.a \
 	wait.a seek.a fd.a sig.a open.a lock.a stralloc.a alloc.a \
-	substdio.a error.a str.a fs.a auto_qmail.o auto_split.o 
+	substdio.a error.a str.a fs.a auto_qmail.o auto_split.o env.a
 
 qmail-send.0: \
 qmail-send.8
diff -u qmail-1.03-orig/qmail.c qmail-1.03/qmail.c
--- qmail-1.03-orig/qmail.c	Mon Jun 15 04:53:16 1998
+++ qmail-1.03/qmail.c	Tue Jan 19 09:57:36 1999
@@ -6,14 +6,25 @@
 #include "fd.h"
 #include "qmail.h"
 #include "auto_qmail.h"
+#include "env.h"
 
-static char *binqqargs[2] = { "bin/qmail-queue", 0 } ;
+static char *binqqargs[2] = { 0, 0 } ;
+
+static void setup_qqargs()
+{
+  if(!binqqargs[0])
+    binqqargs[0] = env_get("QMAILQUEUE");
+  if(!binqqargs[0])
+    binqqargs[0] = "bin/qmail-queue";
+}
 
 int qmail_open(qq)
 struct qmail *qq;
 {
   int pim[2];
   int pie[2];
+
+  setup_qqargs();
 
   if (pipe(pim) == -1) return -1;
   if (pipe(pie) == -1) { close(pim[0]); close(pim[1]); return -1; }