/*      $NetBSD: main.c,v 1.24 2015/06/16 23:18:55 christos Exp $       */

/*
 * Copyright (C) 1995 Wolfgang Solfrank
 * Copyright (c) 1995 Martin Husemann
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: main.c,v 1.24 2015/06/16 23:18:55 christos Exp $");
#endif /* not lint */

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

#include "fsutil.h"
#include "snapshot.h"
#include "ext.h"
#include "exitvalues.h"

int alwaysno;           /* assume "no" for all questions */
int alwaysyes;          /* assume "yes" for all questions */
int preen;              /* set when preening */
int rdonly;             /* device is opened read only (supersedes above) */

static void usage(void) __dead;

static void
usage(void)
{
        (void)fprintf(stderr,
            "Usage: %s [-fnpy] [-x snap_backup] filesystem ... \n",
            getprogname());
        exit(FSCK_EXIT_USAGE);
}

int
main(int argc, char **argv)
{
        int ret = FSCK_EXIT_OK, erg;
        int ch, snapfd;
        char *snap_backup = NULL, *snap_dev;

        while ((ch = getopt(argc, argv, "pPqynfx:")) != -1) {
                switch (ch) {
                case 'f':
                        /*
                         * We are always forced, since we don't
                         * have a clean flag
                         */
                        break;
                case 'n':
                        alwaysno = 1;
                        alwaysyes = preen = 0;
                        break;
                case 'y':
                        alwaysyes = 1;
                        alwaysno = preen = 0;
                        break;

                case 'p':
                        preen = 1;
                        alwaysyes = alwaysno = 0;
                        break;

                case 'P':               /* Progress meter not implemented. */
                        break;

                case 'q':               /* Quiet not implemented. */
                        break;

                case 'x':
                        snap_backup = optarg;
                        break;

                default:
                        usage();
                        break;
                }
        }
        if (snap_backup != NULL && (!alwaysno || alwaysyes)) {
                warnx("Cannot use -x without -n");
                snap_backup = NULL;
        }
        argc -= optind;
        argv += optind;

        if (!argc)
                usage();

        if (signal(SIGINT, SIG_IGN) != SIG_IGN)
                (void) signal(SIGINT, catch);
        if (preen)
                (void) signal(SIGQUIT, catch);

        while (--argc >= 0) {
                setcdevname(*argv, preen);
                if (snap_backup != NULL) {
                        snapfd = snap_open(*argv, snap_backup, NULL, &snap_dev);
                        if (snapfd < 0) {
                                warn("can't take snapshot of %s", *argv);
                                erg = checkfilesys(*argv);
                        } else {
                                erg = checkfilesys(snap_dev);
                                close(snapfd);
                        }
                        argv++;
                } else
                        erg = checkfilesys(*argv++);
                if (erg > ret)
                        ret = erg;
        }

        return ret;
}


/*VARARGS*/
int
ask(int def, const char *fmt, ...)
{
        va_list ap;

        char prompt[256];
        int c;

        if (preen) {
                if (rdonly)
                        def = 0;
                if (def)
                        printf("FIXED\n");
                return def;
        }

        va_start(ap, fmt);
        vsnprintf(prompt, sizeof(prompt), fmt, ap);
        va_end(ap);
        if (alwaysyes || rdonly) {
                printf("%s? %s\n", prompt, rdonly ? "no" : "yes");
                return !rdonly;
        }
        do {
                printf("%s? [yn] ", prompt);
                fflush(stdout);
                c = getchar();
                while (c != '\n' && getchar() != '\n')
                        if (feof(stdin))
                                return 0;
        } while (c != 'y' && c != 'Y' && c != 'n' && c != 'N');
        return c == 'y' || c == 'Y';
}