From: Rich Felker <dalias@aerifal.cx>
Date: Mon, 10 Oct 2011 02:51:03 +0000 (-0400)
Subject: fix F_GETOWN return value handling
X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=commitdiff_plain;h=8e8ddeff7eee6294e24c0a9a29053164f990f1b3

fix F_GETOWN return value handling

the fcntl syscall can return a negative value when the command is
F_GETOWN, and this is not an error code but an actual value. thus we
must special-case it and avoid calling __syscall_ret to set errno.
this fix is better than the glibc fix (using F_GETOWN_EX) which only
works on newer kernels and is more complex.
---

diff --git a/src/fcntl/fcntl.c b/src/fcntl/fcntl.c
index 2c9fb6f3..cc3d6cce 100644
--- a/src/fcntl/fcntl.c
+++ b/src/fcntl/fcntl.c
@@ -13,6 +13,7 @@ int fcntl(int fd, int cmd, ...)
 	va_end(ap);
 	if (cmd == F_SETFL) arg |= O_LARGEFILE;
 	if (cmd == F_SETLKW) return syscall_cp(SYS_fcntl, fd, cmd, arg);
+	if (cmd == F_GETOWN) return __syscall(SYS_fcntl, fd, cmd, arg);
 	return syscall(SYS_fcntl, fd, cmd, arg);
 }