Import glibc-mainline for 2006-08-16

git-svn-id: svn://svn.eglibc.org/fsf/trunk@4 7b3dc134-2b1b-0410-93df-9e9f96275f8d

1 files changed, 101 insertions, 0 deletions

diff --git a/libc/sysdeps/unix/sysv/linux/futimes.c b/libc/sysdeps/unix/sysv/linux/futimes.c
new file mode 100644
index 000000000..b307c3ff6
--- /dev/null
+++ b/libc/sysdeps/unix/sysv/linux/futimes.c
@@ -0,0 +1,101 @@
+/* futimes -- change access and modification times of open file.  Linux version.
+   Copyright (C) 2002,2003,2005,2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <sysdep.h>
+#include <string.h>
+#include <utime.h>
+#include <sys/time.h>
+#include <stdio-common/_itoa.h>
+#include <fcntl.h>
+
+#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.  */
+int
+__futimes (int fd, const struct timeval tvp[2])
+{
+  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
+  result = INLINE_SYSCALL (utimes, 2, cp, tvp);
+# ifndef __ASSUME_UTIMES
+  if (result == -1 && errno == ENOSYS)
+# 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
+      struct utimbuf buf;
+      struct utimbuf *times;
+
+      if (tvp != NULL)
+	{
+	  times = &buf;
+	  buf.actime = tvp[0].tv_sec + (tvp[0].tv_usec + 500000) / 1000000;
+	  buf.modtime = tvp[1].tv_sec + (tvp[1].tv_usec + 500000) / 1000000;
+	}
+      else
+	times = NULL;
+
+      result = INLINE_SYSCALL (utime, 2, cp, times);
+#endif
+    }
+
+  if (result == -1)
+    /* Check for errors that result from failing to find /proc.
+       This means we can't do futimes at all, so return ENOSYS
+       rather than some confusing error.  */
+    switch (errno)
+      {
+      case EACCES:
+	if (tvp == NULL)  /* Could be a path problem or a file problem.  */
+	  break;
+	/*FALLTHROUGH*/
+      case ELOOP:
+      case ENAMETOOLONG:
+      case ENOTDIR:
+	__set_errno (ENOSYS);
+	break;
+
+      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 (INLINE_SYSCALL (fcntl, 3, fd, F_GETFD, 0) != -1)
+	  __set_errno (ENOSYS);
+	break;
+      }
+
+  return result;
+}
+weak_alias (__futimes, futimes)