From 9be74cac45fa878c7797ea301c6279f8273ea1ec Mon Sep 17 00:00:00 2001
From: "Todd C. Miller" <Todd.Miller@courtesan.com>
Date: Tue, 27 Mar 2012 12:41:28 -0400
Subject: [PATCH] If there is nothing to read from the askpass program, set
 errno to EINTR.  This makes the cancel button behave like the user entered ^C
 at the password prompt when PAM is used.

---
 src/tgetpass.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/tgetpass.c b/src/tgetpass.c
index c19e83b9c..8b12bdc8e 100644
--- a/src/tgetpass.c
+++ b/src/tgetpass.c
@@ -254,6 +254,9 @@ sudo_askpass(const char *askpass, const char *prompt)
     (void) close(pfd[0]);
     (void) sigaction(SIGPIPE, &saved_sa_pipe, NULL);
 
+    if (pass == NULL)
+	errno = EINTR;	/* make cancel button simulate ^C */
+
     debug_return_str_masked(pass);
 }
 
-- 
2.40.0