From c27d2078135ca3df129850f87598660252d6906a Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Thu, 10 May 2007 21:44:41 +0000
Subject: * sysdeps/unix/sysv/linux/powerpc/bits/stat.h: Define UTIME_NOW and

	UTIME_OMIT.
	* sysdeps/unix/sysv/linux/x86_64/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/ia64/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/kernel-features.h: Define __ASSUME_UTIMENSAT.
	* io/sys/stat.h: Declare utimensat, futimens.
	* io/utimensat.c: New file.
	* io/futimens.c: New file.
	* sysdeps/unix/sysv/linux/utimensat.c: New file.
	* sysdeps/unix/sysv/linux/futimens.c: New file.
	* io/Makefile (routines): Add utimensat, futimens.
	* io/Versions: Add utimensat, futimens to GLIBC_2.6.
	* sysdeps/unix/sysv/linux/lutimes.c: New file.
	* sysdeps/unix/sysv/linux/futimes.c: Use utimensat syscall if
	available.

	* include/sys/cdefs.h: Redefine __nonnull so that test for
	incorrect parameters in the libc code itself are not omitted.
---
 sysdeps/unix/sysv/linux/futimes.c | 63 +++++++++++++++++++++++++++++++--------
 1 file changed, 50 insertions(+), 13 deletions(-)

(limited to 'sysdeps/unix/sysv/linux/futimes.c')

diff --git a/sysdeps/unix/sysv/linux/futimes.c b/sysdeps/unix/sysv/linux/futimes.c
index b307c3ff64..610f1deb29 100644
--- a/sysdeps/unix/sysv/linux/futimes.c
+++ b/sysdeps/unix/sysv/linux/futimes.c
@@ -20,6 +20,7 @@
 #include <errno.h>
 #include <sysdep.h>
 #include <string.h>
+#include <time.h>
 #include <utime.h>
 #include <sys/time.h>
 #include <stdio-common/_itoa.h>
@@ -27,32 +28,67 @@
 
 #include <kernel-features.h>
 
-/* Change the access time of FILE to TVP[0] and
-   the modification time of FILE to TVP[1], but do not follow symlinks.
 
-   The Linux kernel has no futimes() syscall so we use the /proc
-   filesystem.  */
+#ifndef __ASSUME_UTIMENSAT
+static int miss_utimensat;
+#endif
+
+/* Change the access time of the file associated with FD to TVP[0] and
+   the modification time of FILE to TVP[1].
+
+   Starting with 2.6.22 the Linux kernel has the utimensat syscall which
+   can be used to implement futimes.  Earlier kernels have no futimes()
+   syscall so we use the /proc filesystem.  */
 int
 __futimes (int fd, const struct timeval tvp[2])
 {
+  /* The utimensat system call expects timespec not timeval.  */
+  struct timespec ts[2];
+  if (tvp != NULL)
+    {
+      if (tvp[0].tv_usec < 0 || tvp[0].tv_usec >= 1000000
+          || tvp[1].tv_usec < 0 || tvp[1].tv_usec >= 1000000)
+	{
+	  __set_errno (EINVAL);
+	  return -1;
+	}
+
+      TIMEVAL_TO_TIMESPEC (&tvp[0], &ts[0]);
+      TIMEVAL_TO_TIMESPEC (&tvp[1], &ts[1]);
+    }
+
+#ifdef __ASSUME_UTIMENSAT
+  return INLINE_SYSCALL (utimensat, 4, fd, NULL, tvp ? &ts : NULL, 0);
+#else
+  int result;
+# ifdef __NR_utimensat
+  if (!__builtin_expect (miss_utimensat, 0))
+    {
+      result = INLINE_SYSCALL (utimensat, 4, fd, NULL, tvp ? &ts : NULL, 0);
+      if (__builtin_expect (result, 0) != -1 || errno != ENOSYS)
+	return result;
+
+      miss_utimensat = 1;
+    }
+# endif
+
   static const char selffd[] = "/proc/self/fd/";
   char fname[sizeof (selffd) + 3 * sizeof (int)];
   fname[sizeof (fname) - 1] = '\0';
   char *cp = _itoa_word ((unsigned int) fd, fname + sizeof (fname) - 1, 10, 0);
   cp = memcpy (cp - sizeof (selffd) + 1, selffd, sizeof (selffd) - 1);
 
-  int result;
-#ifdef __NR_utimes
+# ifdef __NR_utimes
   result = INLINE_SYSCALL (utimes, 2, cp, tvp);
-# ifndef __ASSUME_UTIMES
+#  ifndef __ASSUME_UTIMES
   if (result == -1 && errno == ENOSYS)
+#  endif
 # endif
-#endif
     {
       /* The utimes() syscall does not exist or is not available in the
 	 used kernel.  Use utime().  For this we have to convert to the
 	 data format utime() expects.  */
-#ifndef __ASSUME_UTIMES
+# ifndef __ASSUME_UTIMES
       struct utimbuf buf;
       struct utimbuf *times;
 
@@ -66,7 +102,7 @@ __futimes (int fd, const struct timeval tvp[2])
 	times = NULL;
 
       result = INLINE_SYSCALL (utime, 2, cp, times);
-#endif
+# endif
     }
 
   if (result == -1)
@@ -88,14 +124,15 @@ __futimes (int fd, const struct timeval tvp[2])
       case ENOENT:
 	/* Validate the file descriptor by letting fcntl set errno to
 	   EBADF if it's bogus.  Otherwise it's a /proc issue.  */
-#if !defined __NR_fcntl && defined __NR_fcntl64
-# define __NR_fcntl __NR_fcntl64
-#endif
+# if !defined __NR_fcntl && defined __NR_fcntl64
+#  define __NR_fcntl __NR_fcntl64
+# endif
 	if (INLINE_SYSCALL (fcntl, 3, fd, F_GETFD, 0) != -1)
 	  __set_errno (ENOSYS);
 	break;
       }
 
   return result;
+#endif
 }
 weak_alias (__futimes, futimes)
-- 
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