From 86aba86b1b031ec7c7cc43dd679c0991929e6305 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Fri, 26 Oct 2012 17:30:15 +0200
Subject: [PATCH] cws2fws: check lseek() return

Fixes: CID733721
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 tools/cws2fws.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/cws2fws.c b/tools/cws2fws.c
index 8dc285bfff1..c7b62df9106 100644
--- a/tools/cws2fws.c
+++ b/tools/cws2fws.c
@@ -128,8 +128,8 @@ int main(int argc, char *argv[])
         buf_in[2] = ((zstream.total_out + 8) >> 16) & 0xff;
         buf_in[3] = ((zstream.total_out + 8) >> 24) & 0xff;
 
-        lseek(fd_out, 4, SEEK_SET);
-        if (write(fd_out, &buf_in, 4) < 4) {
+        if (   lseek(fd_out, 4, SEEK_SET) < 0
+            || write(fd_out, &buf_in, 4) < 4) {
             perror("Error writing output file");
             return 1;
         }
-- 
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