/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1980, 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Robert Elz at The University of Melbourne.
 *
 * 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.
 */

/*
 * Turn quota on/off for a filesystem.
 */
#include <sys/param.h>
#include <sys/file.h>
#include <sys/mount.h>
#include <ufs/ufs/quota.h>
#include <err.h>
#include <fstab.h>
#include <libutil.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

static const char *qfextension[] = INITQFNAMES;

static int      aflag;          /* all filesystems */
static int      gflag;          /* operate on group quotas */
static int      uflag;          /* operate on user quotas */
static int      vflag;          /* verbose */

static int oneof(char *, char *[], int);
static int quotaonoff(struct fstab *fs, int, int);
static void usage(void) __dead2;

int
main(int argc, char **argv)
{
        struct fstab *fs;
        const char *whoami;
        long argnum, done = 0;
        int ch, i, offmode = 0, errs = 0;

        whoami = getprogname();
        if (strcmp(whoami, "quotaoff") == 0)
                offmode++;
        else if (strcmp(whoami, "quotaon") != 0)
                errx(1, "name must be quotaon or quotaoff");
        while ((ch = getopt(argc, argv, "avug")) != -1) {
                switch(ch) {
                case 'a':
                        aflag++;
                        break;
                case 'g':
                        gflag++;
                        break;
                case 'u':
                        uflag++;
                        break;
                case 'v':
                        vflag++;
                        break;
                default:
                        usage();
                }
        }
        argc -= optind;
        argv += optind;
        if (argc <= 0 && !aflag)
                usage();
        if (!gflag && !uflag) {
                gflag++;
                uflag++;
        }
        setfsent();
        while ((fs = getfsent()) != NULL) {
                if (strcmp(fs->fs_vfstype, "ufs") ||
                    strcmp(fs->fs_type, FSTAB_RW))
                        continue;
                if (aflag) {
                        if (gflag)
                                errs += quotaonoff(fs, offmode, GRPQUOTA);
                        if (uflag)
                                errs += quotaonoff(fs, offmode, USRQUOTA);
                        continue;
                }
                if ((argnum = oneof(fs->fs_file, argv, argc)) >= 0 ||
                    (argnum = oneof(fs->fs_spec, argv, argc)) >= 0) {
                        done |= 1 << argnum;
                        if (gflag)
                                errs += quotaonoff(fs, offmode, GRPQUOTA);
                        if (uflag)
                                errs += quotaonoff(fs, offmode, USRQUOTA);
                }
        }
        endfsent();
        for (i = 0; i < argc; i++)
                if ((done & (1 << i)) == 0)
                        warnx("%s not found in fstab", argv[i]);
        exit(errs);
}

static void
usage(void)
{

        fprintf(stderr, "%s\n%s\n%s\n%s\n",
                "usage: quotaon [-g] [-u] [-v] -a",
                "       quotaon [-g] [-u] [-v] filesystem ...",
                "       quotaoff [-g] [-u] [-v] -a",
                "       quotaoff [-g] [-u] [-v] filesystem ...");
        exit(1);
}

static int
quotaonoff(struct fstab *fs, int offmode, int type)
{
        struct quotafile *qf;

        if ((qf = quota_open(fs, type, O_RDONLY)) == NULL)
                return (0);
        if (offmode) {
                if (quota_off(qf) != 0) {
                        warn("%s", quota_fsname(qf));
                        return (1);
                }
                if (vflag)
                        printf("%s: quotas turned off\n", quota_fsname(qf));
                quota_close(qf);
                return(0);
        }
        if (quota_on(qf) != 0) {
                warn("using %s on %s", quota_qfname(qf), quota_fsname(qf));
                return (1);
        }
        if (vflag)
                printf("%s: %s quotas turned on with data file %s\n", 
                    quota_fsname(qf), qfextension[type], quota_qfname(qf));
        quota_close(qf);
        return(0);
}

/*
 * Check to see if target appears in list of size cnt.
 */
static int
oneof(char *target, char *list[], int cnt)
{
        int i;

        for (i = 0; i < cnt; i++)
                if (strcmp(target, list[i]) == 0)
                        return (i);
        return (-1);
}