busybox/coreutils/realpath.c

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/*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
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/* BB_AUDIT SUSv3 N/A -- Apparently a busybox extension. */
/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
* Now does proper error checking on output and returns a failure exit code
* if one or more paths can not be resolved.
*/
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#include <limits.h>
#include <stdlib.h>
#include "busybox.h"
int realpath_main(int argc, char **argv)
{
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int retval = EXIT_SUCCESS;
RESERVE_CONFIG_BUFFER(resolved_path, PATH_MAX);
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if (--argc == 0) {
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bb_show_usage();
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}
do {
argv++;
if (realpath(*argv, resolved_path) != NULL) {
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puts(resolved_path);
} else {
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retval = EXIT_FAILURE;
bb_perror_msg("%s", *argv);
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}
} while (--argc);
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#ifdef CONFIG_FEATURE_CLEAN_UP
RELEASE_CONFIG_BUFFER(resolved_path);
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#endif
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bb_fflush_stdout_and_exit(retval);
}