140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
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/*
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Copyright (C) 2009 Andreas Gruenbacher <agruen@suse.de>
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This program is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Example how to preserve Extended Attributes in file manager style
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* applications. This does NOT also copy Access Control Lists!
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*
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* Andreas Gruenbacher, SuSE Labs, SuSE Linux AG
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* 23 January 2003
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*/
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#include "config.h"
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <locale.h>
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/* #include <libintl.h> */
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#ifdef HAVE_ATTR_ERROR_CONTEXT_H
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# include <attr/error_context.h>
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#endif
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#ifdef HAVE_ATTR_LIBATTR_H
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# include <attr/libattr.h>
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#endif
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/*
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* We don't fully internationalize this example!
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*/
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#define _(msg) (msg)
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/*
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* Optional error handler for attr_copy_file(). CTX is the error
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* context passed to attr_copy_file(), ERR is the errno value
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* that occurred. FMT and the rest are printf style arguments.
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*/
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static void
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error(struct error_context *ctx, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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if (vfprintf(stderr, fmt, ap))
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fprintf(stderr, ": ");
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fprintf(stderr, "%s\n", strerror(errno));
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va_end(ap);
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}
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/*
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* Optional handler for quoting path names in error messages.
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* (This is a very stupid example!)
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*/
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static const char *
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quote(struct error_context *ctx, const char *pathname)
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{
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char *pn = strdup(pathname), *p;
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pathname = strdup(pathname);
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for (p = pn; *p != '\0'; p++)
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if (*p & 0x80)
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*p='?';
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return pn;
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}
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static void
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quote_free(struct error_context *ctx, const char *name)
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{
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free((void *)name);
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}
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/*
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* The error context we pass to attr_copy_file().
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*/
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struct error_context ctx = { error, quote, quote_free };
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/*
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* Optional attribute filter for attr_copy_file(). This example
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* excludes all attributes other than extended user attributes.
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*/
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static int is_user_attr(const char *name, struct error_context *ctx)
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{
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return strcmp(name, "user.") == 0;
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}
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int
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main(int argc, char *argv[])
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{
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int ret;
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/*
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* Set the locale to enable message translation
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*/
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setlocale(LC_MESSAGES, "");
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setlocale(LC_CTYPE, "");
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if (argc != 3) {
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fprintf(stderr, _("Usage: %s from to\n"), argv[0]);
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exit(1);
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}
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#if defined(HAVE_ATTR_COPY_FILE)
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/*
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* If the third parameter is NULL, all extended attributes
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* except those that define Access Control Lists are copied.
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* ACLs are excluded by default because copying them between
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* file systems with and without ACL support needs some
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* additional logic so that no unexpected permissions result.
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*
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* For copying ACLs, please use perm_copy_file() from libacl.
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*
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* The CTX parameter could also be NULL, in which case attr_copy_file
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* would print no error messages.
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*/
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ret = attr_copy_file(argv[1], argv[2], is_user_attr, &ctx);
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#else
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fprintf(stderr, _("No support for copying extended attributes\n"));
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ret = -1;
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#endif
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if (ret != 0)
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return EXIT_FAILURE;
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return EXIT_SUCCESS;
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}
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