commit 71de840f054e52a8a077b2333edc1f4243480359
from: Gleydson Soares <gsoares@gmail.com>
via: Russ Cox <rsc@swtch.com>
date: Mon Jun 29 02:25:42 2015 UTC

upas/nfs: search for stunnele3 in $PATH

Do not hardcode stunnel directory path, just make sure that is installed
in user '$PATH'. it is required for 'mailfs -t' TLS support, so printout
an error string if it was not found.

Tested with latest stunnel version 5.17 on OpenBSD and macosx.

% mailfs -t imap.gmail.com ; echo $?
0

Change-Id: Icbd507c7efa81ef2aa7aed37bec5f639b37526cb
Reviewed-on: https://plan9port-review.googlesource.com/1280
Reviewed-by: Russ Cox <rsc@swtch.com>

commit - 3f1c876e14e7eb45c1e17e1f3f4a28d98ff9b35f
commit + 71de840f054e52a8a077b2333edc1f4243480359
blob - b36f40bb9346c88466b53140b6329e4497123f57
blob + 1936c115c9d1d08df06b9cae5175d913e4b17e08
--- src/cmd/upas/nfs/imap.c
+++ src/cmd/upas/nfs/imap.c
@@ -779,6 +779,7 @@ imapdial(char *server, int mode)
 	int p[2];
 	int fd[3];
 	char *tmp;
+	char *fpath;
 	
 	switch(mode){
 	default:
@@ -797,10 +798,12 @@ imapdial(char *server, int mode)
 		fd[2] = dup(2, -1);
 #ifdef PLAN9PORT
 		tmp = esmprint("%s:993", server);
-		if(threadspawnl(fd, "/usr/sbin/stunnel3", "stunnel3", "-c", "-r", tmp, nil) < 0
-		    && threadspawnl(fd, "/usr/bin/stunnel3", "stunnel3", "-c", "-r", tmp, nil) < 0
-		    && threadspawnl(fd, "/usr/sbin/stunnel", "stunnel", "-c", "-r", tmp, nil) < 0
-		    && threadspawnl(fd, "/usr/bin/stunnel", "stunnel", "-c", "-r", tmp, nil) < 0){
+		fpath = searchpath("stunnel3");
+		if (!fpath) {
+			werrstr("stunnel not found. it is required for tls support.");
+			return -1;
+		}
+		if(threadspawnl(fd, fpath, "stunnel", "-c", "-r", tmp, nil) < 0) {
 #else
 		tmp = esmprint("tcp!%s!993", server);
 		if(threadspawnl(fd, "/bin/tlsclient", "tlsclient", tmp, nil) < 0){