From 6b92a27195e21e9d96ce2f324c3da593a01a7ae0 Mon Sep 17 00:00:00 2001
From: Ludwig Nussel <ludwig.nussel@suse.de>
Date: Tue, 29 Sep 2009 11:09:31 +0200
Subject: [PATCH] Fail if piped input is broken.

---
 ChangeLog   |    1 +
 lib/utils.c |   13 ++++++++++---
 2 files changed, 11 insertions(+), 3 deletions(-)

Index: cryptsetup-1.0.7/lib/utils.c
===================================================================
--- cryptsetup-1.0.7.orig/lib/utils.c
+++ cryptsetup-1.0.7/lib/utils.c
@@ -361,6 +361,7 @@ int get_key(char *prompt, char **key, un
 	char *pass = NULL;
 	int newline_stop;
 	int read_horizon;
+	int regular_file = 0;
 
 	if(key_file && !strcmp(key_file, "-")) {
 		/* Allow binary reading from stdin */
@@ -435,6 +436,8 @@ int get_key(char *prompt, char **key, un
 				// goto out_err;
 				fprintf(stderr,"Warning: exhausting read requested, but key file is not a regular file, function might never return.\n");
 			}
+			else
+				regular_file = 1;
 		}
 		buflen = 0;
 		for(i = 0; read_horizon == 0 || i < read_horizon; i++) {
@@ -452,6 +455,10 @@ int get_key(char *prompt, char **key, un
 		}
 		if(key_file)
 			close(fd);
+		/* Fail if piped input dies reading nothing */
+		if(!i && !regular_file) {
+			goto out_err;
+		}
 		pass[i] = 0;
 		*key = pass;
 		*passLen = i;