set FD_CLOEXEC properly when O_CLOEXEC is not supported

FD_CLOEXEC only applies to the file descriptor, so it needs to be
manipuluated via F_GETFD/F_SETFD.  F_GETFL/F_SETFL are for file
description flags.

Verified via strace with o_cloexec set to zero.

Signed-off-by: Eric Wong <e@80x24.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/sha1_file.c b/sha1_file.c
index 64e1a21fc61ed24a0b33c12578eab50546ec6270..5e3b6e411a5f7750d36ff18a4c27a199e3993685 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1571,14 +1571,14 @@ int git_open_cloexec(const char *name, int flags)
                fd = open(name, flags | o_cloexec);
        }
 
                fd = open(name, flags | o_cloexec);
        }
 

-#if defined(F_GETFL) && defined(F_SETFL) && defined(FD_CLOEXEC)
+#if defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC)

        {
                static int fd_cloexec = FD_CLOEXEC;
 
                if (!o_cloexec && 0 <= fd && fd_cloexec) {
                        /* Opened w/o O_CLOEXEC?  try with fcntl(2) to add it */
        {
                static int fd_cloexec = FD_CLOEXEC;
 
                if (!o_cloexec && 0 <= fd && fd_cloexec) {
                        /* Opened w/o O_CLOEXEC?  try with fcntl(2) to add it */

-                       int flags = fcntl(fd, F_GETFL);
-                       if (fcntl(fd, F_SETFL, flags | fd_cloexec))
+                       int flags = fcntl(fd, F_GETFD);
+                       if (fcntl(fd, F_SETFD, flags | fd_cloexec))

                                fd_cloexec = 0;
                }
        }
                                fd_cloexec = 0;
                }
        }