2 files changed, 137 insertions, 0 deletions
diff --git a/gnulib b/gnulib
deleted file mode 160000
-Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1
diff --git a/gnulib/lib/copy-file.c b/gnulib/lib/copy-file.c
new file mode 100644
index 0000000..f9cd9c0
--- /dev/null
+++ b/gnulib/lib/copy-file.c
@@ -0,0 +1,137 @@
+/* Copying of files.
+   Copyright (C) 2001-2003, 2006-2007, 2009-2011 Free Software Foundation, Inc.
+   Written by Bruno Haible <haible@clisp.cons.org>, 2001.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+
+#include <config.h>
+
+/* Specification.  */
+#include "copy-file.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#if HAVE_UTIME || HAVE_UTIMES
+# if HAVE_UTIME_H
+#  include <utime.h>
+# else
+#  include <sys/utime.h>
+# endif
+#endif
+
+#include "error.h"
+#include "safe-read.h"
+#include "full-write.h"
+#include "acl.h"
+#include "binary-io.h"
+#include "gettext.h"
+#include "xalloc.h"
+
+#define _(str) gettext (str)
+
+/* The results of open() in this file are not used with fchdir,
+   therefore save some unnecessary work in fchdir.c.  */
+#undef open
+#undef close
+
+enum { IO_SIZE = 32 * 1024 };
+
+void
+copy_file_preserving (const char *src_filename, const char *dest_filename)
+{
+  int src_fd;
+  struct stat statbuf;
+  int mode;
+  int dest_fd;
+  char *buf = xmalloc (IO_SIZE);
+
+  src_fd = open (src_filename, O_RDONLY | O_BINARY);
+  if (src_fd < 0 || fstat (src_fd, &statbuf) < 0)
+    error (EXIT_FAILURE, errno, _("error while opening \"%s\" for reading"),
+           src_filename);
+
+  mode = statbuf.st_mode & 07777;
+
+  dest_fd = open (dest_filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0600);
+  if (dest_fd < 0)
+    error (EXIT_FAILURE, errno, _("cannot open backup file \"%s\" for writing"),
+           dest_filename);
+
+  /* Copy the file contents.  */
+  for (;;)
+    {
+      size_t n_read = safe_read (src_fd, buf, IO_SIZE);
+      if (n_read == SAFE_READ_ERROR)
+        error (EXIT_FAILURE, errno, _("error reading \"%s\""), src_filename);
+      if (n_read == 0)
+        break;
+
+      if (full_write (dest_fd, buf, n_read) < n_read)
+        error (EXIT_FAILURE, errno, _("error writing \"%s\""), dest_filename);
+    }
+
+  free (buf);
+
+#if !USE_ACL
+  if (close (dest_fd) < 0)
+    error (EXIT_FAILURE, errno, _("error writing \"%s\""), dest_filename);
+  if (close (src_fd) < 0)
+    error (EXIT_FAILURE, errno, _("error after reading \"%s\""), src_filename);
+#endif
+
+  /* Preserve the access and modification times.  */
+#if HAVE_UTIME
+  {
+    struct utimbuf ut;
+
+    ut.actime = statbuf.st_atime;
+    ut.modtime = statbuf.st_mtime;
+    utime (dest_filename, &ut);
+  }
+#elif HAVE_UTIMES
+  {
+    struct timeval ut[2];
+
+    ut[0].tv_sec = statbuf.st_atime; ut[0].tv_usec = 0;
+    ut[1].tv_sec = statbuf.st_mtime; ut[1].tv_usec = 0;
+    utimes (dest_filename, &ut);
+  }
+#endif
+
+#if HAVE_CHOWN
+  /* Preserve the owner and group.  */
+  chown (dest_filename, statbuf.st_uid, statbuf.st_gid);
+#endif
+
+  /* Preserve the access permissions.  */
+#if USE_ACL
+  if (copy_acl (src_filename, src_fd, dest_filename, dest_fd, mode))
+    exit (EXIT_FAILURE);
+#else
+  chmod (dest_filename, mode);
+#endif
+
+#if USE_ACL
+  if (close (dest_fd) < 0)
+    error (EXIT_FAILURE, errno, _("error writing \"%s\""), dest_filename);
+  if (close (src_fd) < 0)
+    error (EXIT_FAILURE, errno, _("error after reading \"%s\""), src_filename);
+#endif
+}