commit-tree: check return value from write_sha1_file()

... found by Matthias Kestenholz.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/commit-tree.c b/commit-tree.c
index 88871b0..16c1787 100644 (file)
--- a/commit-tree.c
+++ b/commit-tree.c
@@ -125,7 +125,10 @@ int main(int argc, char **argv)
        while (fgets(comment, sizeof(comment), stdin) != NULL)
                add_buffer(&buffer, &size, "%s", comment);
 
-       write_sha1_file(buffer, size, "commit", commit_sha1);
-       printf("%s\n", sha1_to_hex(commit_sha1));
-       return 0;
+       if (!write_sha1_file(buffer, size, "commit", commit_sha1)) {
+               printf("%s\n", sha1_to_hex(commit_sha1));
+               return 0;
+       }
+       else
+               return 1;
 }