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/*
Copyright (C) 2009 Andreas Gruenbacher <agruen@suse.de>
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 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/>.
*/
/*
* Example how to preserve Extended Attributes in file manager style
* applications. This does NOT also copy Access Control Lists!
*
* Andreas Gruenbacher, SuSE Labs, SuSE Linux AG
* 23 January 2003
*/
#include "config.h"
#include <sys/stat.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdarg.h>
#include <locale.h>
/* #include <libintl.h> */
#ifdef HAVE_ATTR_ERROR_CONTEXT_H
# include <attr/error_context.h>
#endif
#ifdef HAVE_ATTR_LIBATTR_H
# include <attr/libattr.h>
#endif
/*
* We don't fully internationalize this example!
*/
#define _(msg) (msg)
/*
* Optional error handler for attr_copy_file(). CTX is the error
* context passed to attr_copy_file(), ERR is the errno value
* that occurred. FMT and the rest are printf style arguments.
*/
static void
error(struct error_context *ctx, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if (vfprintf(stderr, fmt, ap))
fprintf(stderr, ": ");
fprintf(stderr, "%s\n", strerror(errno));
va_end(ap);
}
/*
* Optional handler for quoting path names in error messages.
* (This is a very stupid example!)
*/
static const char *
quote(struct error_context *ctx, const char *pathname)
{
char *pn = strdup(pathname), *p;
pathname = strdup(pathname);
for (p = pn; *p != '\0'; p++)
if (*p & 0x80)
*p='?';
return pn;
}
static void
quote_free(struct error_context *ctx, const char *name)
{
free((void *)name);
}
/*
* The error context we pass to attr_copy_file().
*/
struct error_context ctx = { error, quote, quote_free };
/*
* Optional attribute filter for attr_copy_file(). This example
* excludes all attributes other than extended user attributes.
*/
static int is_user_attr(const char *name, struct error_context *ctx)
{
return strncmp(name, "user.", 5) == 0;
}
int
main(int argc, char *argv[])
{
int ret;
/*
* Set the locale to enable message translation
*/
setlocale(LC_MESSAGES, "");
setlocale(LC_CTYPE, "");
if (argc != 3) {
fprintf(stderr, _("Usage: %s from to\n"), argv[0]);
exit(1);
}
#if defined(HAVE_ATTR_COPY_FILE)
/*
* If the third parameter is NULL, all extended attributes
* except those that define Access Control Lists are copied.
* ACLs are excluded by default because copying them between
* file systems with and without ACL support needs some
* additional logic so that no unexpected permissions result.
*
* For copying ACLs, please use perm_copy_file() from libacl.
*
* The CTX parameter could also be NULL, in which case attr_copy_file
* would print no error messages.
*/
ret = attr_copy_file(argv[1], argv[2], is_user_attr, &ctx);
#else
fprintf(stderr, _("No support for copying extended attributes\n"));
ret = -1;
#endif
if (ret != 0)
return EXIT_FAILURE;
return EXIT_SUCCESS;
}
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