git_mkstemps: correctly test return value of open()

open() returns -1 on failure, and indeed 0 is a possible success value
if the user closed stdin in our process.  Fix the test.

Signed-off-by: Thomas Rast <trast@inf.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/wrapper.c b/wrapper.c
index bac59d2..094b2ab 100644 (file)
--- a/wrapper.c
+++ b/wrapper.c
@@ -322,7 +322,7 @@ int git_mkstemps_mode(char *pattern, int suffix_len, int mode)
                template[5] = letters[v % num_letters]; v /= num_letters;
 
                fd = open(pattern, O_CREAT | O_EXCL | O_RDWR, mode);
-               if (fd > 0)
+               if (fd >= 0)
                        return fd;
                /*
                 * Fatal error (EPERM, ENOSPC etc).