/*
 * Copyright (c) 1992, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1992, 1993, 1994\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)chflags.c	8.4 (Berkeley) 03/31/94";
#endif /* not lint */

#include <sys/types.h>
#include <sys/stat.h>

#include <err.h>
#include <errno.h>
#include <fts.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

u_long	string_to_flags __P((char **, u_long *, u_long *));
void	usage __P((void));

int
main(argc, argv)
	int argc;
	char *argv[];
{
	FTS *ftsp;
	FTSENT *p;
	u_long clear, set;
	long val;
	int Hflag, Lflag, Pflag, Rflag, ch, fts_options, oct, rval;
	char *flags, *ep;

	Hflag = Lflag = Pflag = Rflag = 0;
	while ((ch = getopt(argc, argv, "HLPR")) != EOF)
		switch (ch) {
		case 'H':
			Hflag = 1;
			Lflag = Pflag = 0;
			break;
		case 'L':
			Lflag = 1;
			Hflag = Pflag = 0;
			break;
		case 'P':
			Pflag = 1;
			Hflag = Lflag = 0;
			break;
		case 'R':
			Rflag = 1;
			break;
		case '?':
		default:
			usage();
		}
	argv += optind;
	argc -= optind;

	if (argc < 2)
		usage();

	fts_options = FTS_PHYSICAL;
	if (Rflag) {
		if (Hflag)
			fts_options |= FTS_COMFOLLOW;
		if (Lflag) {
			fts_options &= ~FTS_PHYSICAL;
			fts_options |= FTS_LOGICAL;
		}
	}

	flags = *argv;
	if (*flags >= '0' && *flags <= '7') {
		errno = 0;
		val = strtol(flags, &ep, 8);
		if (val < 0)
			errno = ERANGE;
		if (errno)
                        err(1, "invalid flags: %s", flags);
                if (*ep)
                        errx(1, "invalid flags: %s", flags);
		set = val;
                oct = 1;
	} else {
		if (string_to_flags(&flags, &set, &clear))
                        errx(1, "invalid flag: %s", flags);
		clear = ~clear;
		oct = 0;
	}

	if ((ftsp = fts_open(++argv, fts_options , 0)) == NULL)
		err(1, NULL); 

	for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
		switch (p->fts_info) {
		case FTS_D:
			if (Rflag)		/* Change it at FTS_DP. */
				continue;
			fts_set(ftsp, p, FTS_SKIP);
			break;
		case FTS_DNR:			/* Warn, chflag, continue. */
			errno = p->fts_errno;
			warn("%s", p->fts_path);
			rval = 1;
			break;
		case FTS_ERR:			/* Warn, continue. */
		case FTS_NS:
			errno = p->fts_errno;
			warn("%s", p->fts_path);
			rval = 1;
			continue;
		case FTS_SL:			/* Ignore. */
		case FTS_SLNONE:
			/*
			 * The only symlinks that end up here are ones that
			 * don't point to anything and ones that we found
			 * doing a physical walk.
			 */
			continue;
		default:
			break;
		}
		if (oct) {
			if (!chflags(p->fts_accpath, set))
				continue;
		} else {
			p->fts_statp->st_flags |= set;
			p->fts_statp->st_flags &= clear;
			if (!chflags(p->fts_accpath, p->fts_statp->st_flags))
				continue;
		}
		warn("%s", p->fts_path);
		rval = 1;
	}
	if (errno)
		err(1, "fts_read");
	exit(rval);
}

void
usage()
{
	(void)fprintf(stderr,
	    "usage: chflags [-R [-H | -L | -P]] flags file ...\n");
	exit(1);
}