[FFmpeg-cvslog] cws2fws: check lseek() return

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri Oct 26 17:30:15 2012 +0200| [86aba86b1b031ec7c7cc43dd679c0991929e6305] | committer: Michael Niedermayer

cws2fws: check lseek() return

Fixes: CID733721
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=86aba86b1b031ec7c7cc43dd679c0991929e6305
---

 tools/cws2fws.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/cws2fws.c b/tools/cws2fws.c
index 8dc285b..c7b62df 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;
         }