threads / patch / 46393

patchset FD_CLOEXEC properly when O_CLOEXEC is not supported

Subject: [PATCH] set FD_CLOEXEC properly when O_CLOEXEC is not supported

## tl;dr

One message between Jul 15, 2017 and Jul 15, 2017. Diffs are folded; open one to read it.

replies: 0people: 1as markdown or json

Eric Wong· Jul 15, 2017, 18:55 UTC · lore

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>
---
 sha1_file.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
Show changes to sha1_file.c +3 −3
diff --git a/sha1_file.c b/sha1_file.c
index fca165f13c..b60ae15f70 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1684,14 +1684,14 @@ int git_open_cloexec(const char *name, int flags)
 		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 */
-			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;
 		}
 	}
-- 
EW

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