/* Copying of files.
- Copyright (C) 2001-2003, 2006-2007 Free Software Foundation, Inc.
+ Copyright (C) 2001-2003, 2006-2007, 2009-2014 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
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#endif
#include "error.h"
+#include "ignore-value.h"
#include "safe-read.h"
#include "full-write.h"
#include "acl.h"
#include "binary-io.h"
+#include "quote.h"
#include "gettext.h"
+#include "xalloc.h"
#define _(str) gettext (str)
#undef open
#undef close
+enum { IO_SIZE = 32 * 1024 };
-void
-copy_file_preserving (const char *src_filename, const char *dest_filename)
+int
+qcopy_file_preserving (const char *src_filename, const char *dest_filename)
{
+ int err = 0;
int src_fd;
struct stat statbuf;
int mode;
int dest_fd;
- char buf[4096];
- const size_t 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);
+ if (src_fd < 0)
+ {
+ err = GL_COPY_ERR_OPEN_READ;
+ goto error;
+ }
+ if (fstat (src_fd, &statbuf) < 0)
+ {
+ err = GL_COPY_ERR_OPEN_READ;
+ goto error_src;
+ }
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);
+ {
+ err = GL_COPY_ERR_OPEN_BACKUP_WRITE;
+ goto error_src;
+ }
/* 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);
+ {
+ err = GL_COPY_ERR_READ;
+ goto error_src_dest;
+ }
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);
+ {
+ err = GL_COPY_ERR_WRITE;
+ goto error_src_dest;
+ }
}
+ free (buf);
+
#if !USE_ACL
if (close (dest_fd) < 0)
- error (EXIT_FAILURE, errno, _("error writing \"%s\""), dest_filename);
+ {
+ err = GL_COPY_ERR_WRITE;
+ goto error_src;
+ }
if (close (src_fd) < 0)
- error (EXIT_FAILURE, errno, _("error after reading \"%s\""), src_filename);
+ {
+ err = GL_COPY_ERR_AFTER_READ;
+ goto error;
+ }
#endif
/* Preserve the access and modification times. */
#if HAVE_CHOWN
/* Preserve the owner and group. */
- chown (dest_filename, statbuf.st_uid, statbuf.st_gid);
+ ignore_value (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);
+ switch (qcopy_acl (src_filename, src_fd, dest_filename, dest_fd, mode))
+ {
+ case -2:
+ err = GL_COPY_ERR_GET_ACL;
+ goto error_src_dest;
+ case -1:
+ err = GL_COPY_ERR_SET_ACL;
+ goto error_src_dest;
+ }
#else
chmod (dest_filename, mode);
#endif
#if USE_ACL
if (close (dest_fd) < 0)
- error (EXIT_FAILURE, errno, _("error writing \"%s\""), dest_filename);
+ {
+ err = GL_COPY_ERR_WRITE;
+ goto error_src;
+ }
if (close (src_fd) < 0)
- error (EXIT_FAILURE, errno, _("error after reading \"%s\""), src_filename);
+ {
+ err = GL_COPY_ERR_AFTER_READ;
+ goto error;
+ }
#endif
+
+ return 0;
+
+ error_src_dest:
+ close (dest_fd);
+ error_src:
+ close (src_fd);
+ error:
+ return err;
+}
+
+void
+copy_file_preserving (const char *src_filename, const char *dest_filename)
+{
+ switch (qcopy_file_preserving (src_filename, dest_filename))
+ {
+ case 0:
+ return;
+
+ case GL_COPY_ERR_OPEN_READ:
+ error (EXIT_FAILURE, errno, _("error while opening %s for reading"),
+ quote (src_filename));
+
+ case GL_COPY_ERR_OPEN_BACKUP_WRITE:
+ error (EXIT_FAILURE, errno, _("cannot open backup file %s for writing"),
+ quote (dest_filename));
+
+ case GL_COPY_ERR_READ:
+ error (EXIT_FAILURE, errno, _("error reading %s"),
+ quote (src_filename));
+
+ case GL_COPY_ERR_WRITE:
+ error (EXIT_FAILURE, errno, _("error writing %s"),
+ quote (dest_filename));
+
+ case GL_COPY_ERR_AFTER_READ:
+ error (EXIT_FAILURE, errno, _("error after reading %s"),
+ quote (src_filename));
+
+ case GL_COPY_ERR_GET_ACL:
+ error (EXIT_FAILURE, errno, "%s", quote (src_filename));
+
+ case GL_COPY_ERR_SET_ACL:
+ error (EXIT_FAILURE, errno, _("preserving permissions for %s"),
+ quote (dest_filename));
+
+ default:
+ abort ();
+ }
}
projects / gnulib.git / blobdiff