[PATCH v3 06/48] access: Use faccessat if arch does not have the access syscall
Markos Chandras
markos.chandras at gmail.com
Wed Jan 23 11:41:30 UTC 2013
From: Markos Chandras <markos.chandras at imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras at imgtec.com>
---
include/unistd.h | 1 +
libc/sysdeps/linux/common/access.c | 10 ++++++++++
libc/sysdeps/linux/common/faccessat.c | 1 +
3 files changed, 12 insertions(+)
diff --git a/include/unistd.h b/include/unistd.h
index e4ec298..e1169b4 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -307,6 +307,7 @@ extern int eaccess (const char *__name, int __type)
otherwise use real IDs like `access'. */
extern int faccessat (int __fd, const char *__file, int __type, int __flag)
__THROW __nonnull ((2)) __wur;
+libc_hidden_proto(faccessat)
#endif /* Use GNU. */
diff --git a/libc/sysdeps/linux/common/access.c b/libc/sysdeps/linux/common/access.c
index a075d42..fd676d9 100644
--- a/libc/sysdeps/linux/common/access.c
+++ b/libc/sysdeps/linux/common/access.c
@@ -8,5 +8,15 @@
*/
#include <sys/syscall.h>
+#include <fcntl.h>
#include <unistd.h>
+
+#if defined(__NR_faccessat) && !defined(__NR_access)
+int access(const char *pathname, int mode)
+{
+ return faccessat(AT_FDCWD, pathname, mode, 0);
+}
+
+#else
_syscall2(int, access, const char *, pathname, int, mode)
+#endif
diff --git a/libc/sysdeps/linux/common/faccessat.c b/libc/sysdeps/linux/common/faccessat.c
index 09ca129..156df64 100644
--- a/libc/sysdeps/linux/common/faccessat.c
+++ b/libc/sysdeps/linux/common/faccessat.c
@@ -11,6 +11,7 @@
#ifdef __NR_faccessat
_syscall4(int, faccessat, int, fd, const char *, file, int, type, int, flag)
+libc_hidden_def(faccessat)
#else
/* should add emulation with faccess() and /proc/self/fd/ ... */
#endif
--
1.8.1.1
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