[git commit] stat: Use fstatat64 if arch does not have the stat syscall

Bernhard Reutner-Fischer rep.dot.nop at gmail.com
Wed Feb 20 12:45:13 UTC 2013


commit: http://git.uclibc.org/uClibc/commit/?id=13f56c443b697190373d555b25e2577dcd32a3b6
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>
---
 include/sys/stat.h                  |    1 +
 libc/sysdeps/linux/common/fstatat.c |    1 +
 libc/sysdeps/linux/common/stat.c    |   22 +++++++++++++++++-----
 3 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/include/sys/stat.h b/include/sys/stat.h
index f3a52ad..495a68c 100644
--- a/include/sys/stat.h
+++ b/include/sys/stat.h
@@ -241,6 +241,7 @@ libc_hidden_proto(fstat64)
 extern int fstatat (int __fd, const char *__restrict __file,
 		    struct stat *__restrict __buf, int __flag)
      __THROW __nonnull ((2, 3));
+libc_hidden_proto(fstatat)
 # else
 #  ifdef __REDIRECT_NTH
 extern int __REDIRECT_NTH (fstatat, (int __fd, const char *__restrict __file,
diff --git a/libc/sysdeps/linux/common/fstatat.c b/libc/sysdeps/linux/common/fstatat.c
index 06c3ab9..4006814 100644
--- a/libc/sysdeps/linux/common/fstatat.c
+++ b/libc/sysdeps/linux/common/fstatat.c
@@ -38,6 +38,7 @@ int fstatat(int fd, const char *file, struct stat *buf, int flag)
 # endif /* __ARCH_HAS_DEPRECATED_SYSCALLS__ */
 	return ret;
 }
+libc_hidden_def(fstatat)
 #else
 /* should add emulation with fstat() and /proc/self/fd/ ... */
 #endif
diff --git a/libc/sysdeps/linux/common/stat.c b/libc/sysdeps/linux/common/stat.c
index 829f35a..c7e2138 100644
--- a/libc/sysdeps/linux/common/stat.c
+++ b/libc/sysdeps/linux/common/stat.c
@@ -10,14 +10,24 @@
 #include <sys/syscall.h>
 #include <unistd.h>
 #include <sys/stat.h>
-#include "xstatconv.h"
 
 #undef stat
 
+#if defined __NR_fstatat64 && !defined __NR_stat
+# include <fcntl.h>
+
+int stat(const char *file_name, struct stat *buf)
+{
+	return fstatat(AT_FDCWD, file_name, buf, 0);
+}
+
+#else
+# include "xstatconv.h"
+
 int stat(const char *file_name, struct stat *buf)
 {
 	int result;
-#ifdef __NR_stat64
+# ifdef __NR_stat64
 	/* normal stat call has limited values for various stat elements
 	 * e.g. uid device major/minor etc.
 	 * so we use 64 variant if available
@@ -28,19 +38,21 @@ int stat(const char *file_name, struct stat *buf)
 	if (result == 0) {
 		__xstat32_conv(&kbuf, buf);
 	}
-#else
+# else
 	struct kernel_stat kbuf;
 
 	result = INLINE_SYSCALL(stat, 2, file_name, &kbuf);
 	if (result == 0) {
 		__xstat_conv(&kbuf, buf);
 	}
-#endif
+# endif /* __NR_stat64 */
 	return result;
 }
+#endif /* __NR_fstat64 */
 libc_hidden_def(stat)
 
-#if ! defined __NR_stat64 && defined __UCLIBC_HAS_LFS__
+#if ! defined __NR_stat64 && ! defined __NR_fstatat64 && \
+	defined __UCLIBC_HAS_LFS__
 strong_alias_untyped(stat,stat64)
 libc_hidden_def(stat64)
 #endif


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