/*      $OpenBSD: mtree.c,v 1.28 2022/12/04 23:50:51 cheloha Exp $      */
/*      $NetBSD: mtree.c,v 1.7 1996/09/05 23:29:22 thorpej Exp $        */

/*-
 * Copyright (c) 1989, 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <limits.h>
#include <fts.h>
#include <grp.h>
#include <pwd.h>
#include "mtree.h"
#include "extern.h"

extern u_int32_t crc_total;

int ftsoptions = FTS_PHYSICAL;
int cflag, dflag, eflag, iflag, lflag, nflag, qflag, rflag, sflag, tflag,
    uflag, Uflag;
u_int keys;
char fullpath[PATH_MAX];

static void usage(void);

int
main(int argc, char *argv[])
{
        int ch;
        char *dir, *p;
        int status;

        dir = NULL;
        keys = KEYDEFAULT;
        while ((ch = getopt(argc, argv, "cdef:iK:k:lnp:qrs:tUux")) != -1)
                switch(ch) {
                case 'c':
                        cflag = 1;
                        break;
                case 'd':
                        dflag = 1;
                        break;
                case 'e':
                        eflag = 1;
                        break;
                case 'f':
                        if (!(freopen(optarg, "r", stdin)))
                                error("%s: %s", optarg, strerror(errno));
                        break;
                case 'i':
                        iflag = 1;
                        break;
                case 'K':
                        while ((p = strsep(&optarg, " \t,")) != NULL)
                                if (*p != '\0')
                                        keys |= parsekey(p, NULL);
                        break;
                case 'k':
                        keys = F_TYPE;
                        while ((p = strsep(&optarg, " \t,")) != NULL)
                                if (*p != '\0')
                                        keys |= parsekey(p, NULL);
                        break;
                case 'l':
                        lflag = 1;
                        break;
                case 'n':
                        nflag = 1;
                        break;
                case 'p':
                        dir = optarg;
                        break;
                case 'q':
                        qflag = 1;
                        break;
                case 'r':
                        rflag = 1;
                        break;
                case 's':
                        sflag = 1;
                        crc_total = ~strtol(optarg, &p, 0);
                        if (*p)
                                error("illegal seed value -- %s", optarg);
                        break;
                case 't':
                        tflag = 1;
                        break;
                case 'U':
                        Uflag = 1;
                        uflag = 1;
                        break;
                case 'u':
                        uflag = 1;
                        break;
                case 'x':
                        ftsoptions |= FTS_XDEV;
                        break;
                default:
                        usage();
                }
        argc -= optind;
        argv += optind;

        if (argc)
                usage();

        /*
         * If uflag is set we can't make any pledges because we must be able
         * to chown and place setugid bits.  Make sure that we're pledged
         * when -c was specified.
         */
        if (!uflag || cflag) {
                if (rflag && tflag) {
                        if (pledge("stdio rpath cpath getpw fattr", NULL) == -1)
                                err(1, "pledge");
                } else if (rflag && !tflag) {
                        if (pledge("stdio rpath cpath getpw", NULL) == -1)
                                err(1, "pledge");
                } else if (!rflag && tflag) {
                        if (pledge("stdio rpath getpw fattr", NULL) == -1)
                                err(1, "pledge");
                } else {
                        if (pledge("stdio rpath getpw", NULL) == -1)
                                err(1, "pledge");
                }
        }

        /* Keep passwd and group files open for faster lookups. */
        setpassent(1);
        setgroupent(1);

        if (dir && chdir(dir))
                error("%s: %s", dir, strerror(errno));

        if ((cflag || sflag) && !getcwd(fullpath, sizeof fullpath))
                error("getcwd: %s", strerror(errno));

        if (lflag == 1 && uflag == 1)
                error("-l and -u flags are mutually exclusive");

        if (cflag) {
                cwalk();
                exit(0);
        }
        status = verify();
        if (Uflag && (status == MISMATCHEXIT))
                status = 0;
        exit(status);
}

static void
usage(void)
{
        (void)fprintf(stderr,
            "usage: mtree [-cdeilnqrtUux] [-f spec] [-K keywords] "
            "[-k keywords] [-p path]\n"
            "             [-s seed]\n");
        exit(1);
}