X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fcopy-file.c;h=f9cd9c06bcc6e2294f0a6e386f5185d5fa3ad1b5;hb=8d31711c57dba0cc1a1f579ed2d59b94bbe39176;hp=a03047b58ead3e87c2f9a9d023678771e04468e3;hpb=c845cbfc0d3b726794f95723a7a1105d98e8725d;p=gnulib.git

diff --git a/lib/copy-file.c b/lib/copy-file.c
index a03047b58..f9cd9c06b 100644
--- a/lib/copy-file.c
+++ b/lib/copy-file.c
@@ -1,11 +1,11 @@
 /* Copying of files.
-   Copyright (C) 2001-2003 Free Software Foundation, Inc.
+   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
+   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 2, or (at your option)
-   any later version.
+   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
@@ -13,24 +13,20 @@
    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, write to the Free Software Foundation,
-   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
+#include <config.h>
 
 /* Specification.  */
 #include "copy-file.h"
 
 #include <errno.h>
 #include <fcntl.h>
+#include <stddef.h>
+#include <stdlib.h>
 #include <sys/stat.h>
-
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 
 #if HAVE_UTIME || HAVE_UTIMES
 # if HAVE_UTIME_H
@@ -43,12 +39,20 @@
 #include "error.h"
 #include "safe-read.h"
 #include "full-write.h"
+#include "acl.h"
 #include "binary-io.h"
-#include "exit.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)
 {
@@ -56,38 +60,41 @@ copy_file_preserving (const char *src_filename, const char *dest_filename)
   struct stat statbuf;
   int mode;
   int dest_fd;
-  char buf[4096];
-  const int buf_size = sizeof (buf);
+  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);
+           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);
+           dest_filename);
 
   /* Copy the file contents.  */
   for (;;)
     {
-      size_t n_read = safe_read (src_fd, buf, buf_size);
+      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);
+        error (EXIT_FAILURE, errno, _("error reading \"%s\""), src_filename);
       if (n_read == 0)
-	break;
+        break;
 
       if (full_write (dest_fd, buf, n_read) < n_read)
-	error (EXIT_FAILURE, errno, _("error writing \"%s\""), dest_filename);
+        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
@@ -108,9 +115,23 @@ copy_file_preserving (const char *src_filename, const char *dest_filename)
   }
 #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
 }