tools: Check the return value of write().

This fixes several warnings of the type:
warning: ignoring return value of ‘write’, declared with attribute warn_unused_result

1 files changed, 5 insertions, 1 deletions

diff --git a/tools/pktdumper.c b/tools/pktdumper.c
index 3ab39ee675..80816d24b9 100644
--- a/tools/pktdumper.c
+++ b/tools/pktdumper.c
@@ -104,7 +104,11 @@ int main(int argc, char **argv)
         //printf("open(\"%s\")\n", pktfilename);
         if (!nowrite) {
             fd = open(pktfilename, O_WRONLY|O_CREAT, 0644);
-            write(fd, pkt.data, pkt.size);
+            err = write(fd, pkt.data, pkt.size);
+            if (err < 0) {
+                fprintf(stderr, "write: error %d\n", err);
+                return 1;
+            }
             close(fd);
         }
         av_free_packet(&pkt);