/* vi: set sw=4 ts=4: */
/*
 * Mini chgrp implementation for busybox
 *
 * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org>
 *
 * 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
 *
 */

/* BB_AUDIT SUSv3 defects - unsupported options -h, -H, -L, and -P. */
/* BB_AUDIT GNU defects - unsupported options -h, -c, -f, -v, and long options. */
/* BB_AUDIT Note: gnu chgrp does not support -H, -L, or -P. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/chgrp.html */

#include <stdlib.h>
#include <unistd.h>
#include "busybox.h"

/* Don't use lchown for libc5 or glibc older then 2.1.x */
#if (__GLIBC__ <= 2) && (__GLIBC_MINOR__ < 1)
#define lchown	chown
#endif

static int fileAction(const char *fileName, struct stat *statbuf, void* junk)
{
	if (lchown(fileName, statbuf->st_uid, *((long *) junk)) == 0) {
		return (TRUE);
	}
	bb_perror_msg("%s", fileName);	/* Avoid multibyte problems. */
	return (FALSE);
}

int chgrp_main(int argc, char **argv)
{
	long gid;
	int recursiveFlag;
	int retval = EXIT_SUCCESS;
	char *p;

	recursiveFlag = bb_getopt_ulflags(argc, argv, "R");

	if (argc - optind < 2) {
		bb_show_usage();
	}

	argv += optind;

	/* Find the selected group */
	gid = strtoul(*argv, &p, 10);	/* maybe it's already numeric */
	if (*p || (p == *argv)) {		/* trailing chars or nonnumeric */
		gid = my_getgrnam(*argv);
	}
	++argv;

	/* Ok, ready to do the deed now */
	do {
		if (! recursive_action (*argv, recursiveFlag, FALSE, FALSE, 
								fileAction, fileAction, &gid)) {
			retval = EXIT_FAILURE;
		}
	} while (*++argv);

	return retval;
}

/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/