[PATCH] git_getpass: fix ssh-askpass behaviour

[Alexander Sulfrian <alexander@sulfrian.net>]

call ssh-askpass only if the display environment variable is also set
---
 connect.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/connect.c b/connect.c
index 57dc20c..2810e3b 100644
--- a/connect.c
+++ b/connect.c
@@ -621,7 +621,7 @@ int finish_connect(struct child_process *conn)
 
 char *git_getpass(const char *prompt)
 {
-	const char *askpass;
+	const char *askpass, *display;
 	struct child_process pass;
 	const char *args[3];
 	static struct strbuf buffer = STRBUF_INIT;
@@ -631,7 +631,10 @@ char *git_getpass(const char *prompt)
 		askpass = askpass_program;
 	if (!askpass)
 		askpass = getenv("SSH_ASKPASS");
-	if (!askpass || !(*askpass)) {
+
+	/* only call askpass if display is set */
+	display = getenv("DISPLAY");
+	if (!display || !(*display) || !askpass || !(*askpass))
 		char *result = getpass(prompt);
 		if (!result)
 			die_errno("Could not read password");
-- 
1.7.2.2