[git commit] lchown: Use fchownat if arch does not have the lchown syscall
Bernhard Reutner-Fischer
rep.dot.nop at gmail.com
Wed Feb 20 12:45:11 UTC 2013
commit: http://git.uclibc.org/uClibc/commit/?id=d8386ad5e72b0e0583cc233d476c5b50ca66a4e5
branch: http://git.uclibc.org/uClibc/commit/?id=refs/heads/master
Signed-off-by: Markos Chandras <markos.chandras at imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop at gmail.com>
---
libc/sysdeps/linux/common/lchown.c | 25 ++++++++++++++++++-------
1 files changed, 18 insertions(+), 7 deletions(-)
diff --git a/libc/sysdeps/linux/common/lchown.c b/libc/sysdeps/linux/common/lchown.c
index c0f8ce7..4d310fd 100644
--- a/libc/sysdeps/linux/common/lchown.c
+++ b/libc/sysdeps/linux/common/lchown.c
@@ -11,17 +11,26 @@
#include <unistd.h>
#include <bits/wordsize.h>
-#if (__WORDSIZE == 32 && defined(__NR_lchown32)) || __WORDSIZE == 64
-# ifdef __NR_lchown32
-# undef __NR_lchown
-# define __NR_lchown __NR_lchown32
-# endif
+#if defined __NR_fchownat && !defined __NR_lchown
+# include <fcntl.h>
+int lchown(const char *path, uid_t owner, gid_t group)
+{
+ return fchownat(AT_FDCWD, path, owner, group, AT_SYMLINK_NOFOLLOW);
+}
+
+#else
+
+# if (__WORDSIZE == 32 && defined(__NR_lchown32)) || __WORDSIZE == 64
+# ifdef __NR_lchown32
+# undef __NR_lchown
+# define __NR_lchown __NR_lchown32
+# endif
_syscall3(int, lchown, const char *, path, uid_t, owner, gid_t, group)
-#else
+# else
-# define __NR___syscall_lchown __NR_lchown
+# define __NR___syscall_lchown __NR_lchown
static __inline__ _syscall3(int, __syscall_lchown, const char *, path,
__kernel_uid_t, owner, __kernel_gid_t, group)
@@ -35,4 +44,6 @@ int lchown(const char *path, uid_t owner, gid_t group)
return __syscall_lchown(path, owner, group);
}
+# endif
+
#endif
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