/*-
 * 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.
 */

/*
 * Disk quota editor.
 */

#include <sys/file.h>
#include <sys/mount.h>
#include <sys/wait.h>
#include <ufs/ufs/quota.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fstab.h>
#include <grp.h>
#include <inttypes.h>
#include <libutil.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "pathnames.h"

/* Let's be paranoid about block size */
#if 10 > DEV_BSHIFT
#define dbtokb(db) \
        ((off_t)(db) >> (10-DEV_BSHIFT))
#elif 10 < DEV_BSHIFT
#define dbtokb(db) \
        ((off_t)(db) << (DEV_BSHIFT-10))
#else
#define dbtokb(db)      (db)
#endif

static const char *qfextension[] = INITQFNAMES;
static char tmpfil[] = _PATH_TMP;
static int hflag;

struct quotause {
        struct  quotause *next;
        struct  quotafile *qf;
        struct  dqblk dqblk;
        int     flags;
        char    fsname[MAXPATHLEN + 1];
};
#define FOUND   0x01

int alldigits(const char *s);
int cvtatos(uint64_t, char *, uint64_t *);
char *cvtstoa(uint64_t);
uint64_t cvtblkval(uint64_t, char, const char *);
uint64_t cvtinoval(uint64_t, char, const char *);
int editit(char *);
char *fmthumanvalblks(int64_t);
char *fmthumanvalinos(int64_t);
void freeprivs(struct quotause *);
int getentry(const char *, int);
struct quotause *getprivs(long, int, char *);
void putprivs(long, struct quotause *);
int readprivs(struct quotause *, char *);
int readtimes(struct quotause *, char *);
static void usage(void) __dead2;
int writetimes(struct quotause *, int, int);
int writeprivs(struct quotause *, int, char *, int);

int
main(int argc, char *argv[])
{
        struct quotause *qup, *protoprivs, *curprivs;
        long id, protoid;
        int i, quotatype, range, tmpfd;
        uid_t startuid, enduid;
        uint64_t lim;
        char *protoname, *cp, *endpt, *oldoptarg;
        int eflag = 0, tflag = 0, pflag = 0, ch;
        char *fspath = NULL;
        char buf[MAXLOGNAME];

        if (argc < 2)
                usage();
        if (getuid())
                errx(1, "permission denied");
        quotatype = USRQUOTA;
        protoprivs = NULL;
        curprivs = NULL;
        protoname = NULL;
        while ((ch = getopt(argc, argv, "ughtf:p:e:")) != -1) {
                switch(ch) {
                case 'f':
                        fspath = optarg;
                        break;
                case 'p':
                        if (eflag) {
                                warnx("cannot specify both -e and -p");
                                usage();
                                /* not reached */
                        }
                        protoname = optarg;
                        pflag++;
                        break;
                case 'g':
                        quotatype = GRPQUOTA;
                        break;
                case 'h':
                        hflag++;
                        break;
                case 'u':
                        quotatype = USRQUOTA;
                        break;
                case 't':
                        tflag++;
                        break;
                case 'e':
                        if (pflag) {
                                warnx("cannot specify both -e and -p");
                                usage();
                                /* not reached */
                        }
                        if ((qup = calloc(1, sizeof(*qup))) == NULL)
                                errx(2, "out of memory");
                        oldoptarg = optarg;
                        for (i = 0, cp = optarg;
                             (cp = strsep(&optarg, ":")) != NULL; i++) {
                                if (cp != oldoptarg)
                                        *(cp - 1) = ':';
                                if (i > 0 && !isdigit(*cp)) {
                                        warnx("incorrect quota specification: "
                                            "%s", oldoptarg);
                                        usage();
                                        /* Not Reached */
                                }
                                switch (i) {
                                case 0:
                                        strlcpy(qup->fsname, cp,
                                            sizeof(qup->fsname));
                                        break;
                                case 1:
                                        lim = strtoll(cp, &endpt, 10);
                                        qup->dqblk.dqb_bsoftlimit =
                                                cvtblkval(lim, *endpt,
                                                    "block soft limit");
                                        continue;
                                case 2:
                                        lim = strtoll(cp, &endpt, 10);
                                        qup->dqblk.dqb_bhardlimit =
                                                cvtblkval(lim, *endpt,
                                                    "block hard limit");
                                        continue;
                                case 3:
                                        lim = strtoll(cp, &endpt, 10);
                                        qup->dqblk.dqb_isoftlimit =
                                                cvtinoval(lim, *endpt,
                                                    "inode soft limit");
                                        continue;
                                case 4:
                                        lim = strtoll(cp, &endpt, 10);
                                        qup->dqblk.dqb_ihardlimit =
                                                cvtinoval(lim, *endpt,
                                                    "inode hard limit");
                                        continue;
                                default:
                                        warnx("incorrect quota specification: "
                                            "%s", oldoptarg);
                                        usage();
                                        /* Not Reached */
                                }
                        }
                        if (protoprivs == NULL) {
                                protoprivs = curprivs = qup;
                        } else {
                                curprivs->next = qup;
                                curprivs = qup;
                        }
                        eflag++;
                        break;
                default:
                        usage();
                        /* Not Reached */
                }
        }
        argc -= optind;
        argv += optind;
        if (pflag || eflag) {
                if (pflag) {
                        if ((protoid = getentry(protoname, quotatype)) == -1)
                                exit(1);
                        protoprivs = getprivs(protoid, quotatype, fspath);
                        if (protoprivs == NULL)
                                exit(0);
                        for (qup = protoprivs; qup; qup = qup->next) {
                                qup->dqblk.dqb_btime = 0;
                                qup->dqblk.dqb_itime = 0;
                        }
                }
                for (; argc-- > 0; argv++) {
                        if (strspn(*argv, "0123456789-") == strlen(*argv) &&
                            (cp = strchr(*argv, '-')) != NULL) {
                                *cp++ = '\0';
                                startuid = atoi(*argv);
                                enduid = atoi(cp);
                                if (enduid < startuid)
                                        errx(1,
        "ending uid (%d) must be >= starting uid (%d) when using uid ranges",
                                                enduid, startuid);
                                range = 1;
                        } else {
                                startuid = enduid = 0;
                                range = 0;
                        }
                        for ( ; startuid <= enduid; startuid++) {
                                if (range)
                                        snprintf(buf, sizeof(buf), "%d",
                                            startuid);
                                else
                                        snprintf(buf, sizeof(buf), "%s",
                                                *argv);
                                if ((id = getentry(buf, quotatype)) < 0)
                                        continue;
                                if (pflag) {
                                        putprivs(id, protoprivs);
                                        continue;
                                }
                                for (qup = protoprivs; qup; qup = qup->next) {
                                        curprivs = getprivs(id, quotatype,
                                            qup->fsname);
                                        if (curprivs == NULL)
                                                continue;
                                        curprivs->dqblk = qup->dqblk;
                                        putprivs(id, curprivs);
                                        freeprivs(curprivs);
                                }
                        }
                }
                if (pflag)
                        freeprivs(protoprivs);
                exit(0);
        }
        tmpfd = mkostemp(tmpfil, O_CLOEXEC);
        fchown(tmpfd, getuid(), getgid());
        if (tflag) {
                if ((protoprivs = getprivs(0, quotatype, fspath)) != NULL) {
                        if (writetimes(protoprivs, tmpfd, quotatype) != 0 &&
                            editit(tmpfil) && readtimes(protoprivs, tmpfil))
                                putprivs(0L, protoprivs);
                        freeprivs(protoprivs);
                }
                close(tmpfd);
                unlink(tmpfil);
                exit(0);
        }
        for ( ; argc > 0; argc--, argv++) {
                if ((id = getentry(*argv, quotatype)) == -1)
                        continue;
                if ((curprivs = getprivs(id, quotatype, fspath)) == NULL)
                        exit(1);
                if (writeprivs(curprivs, tmpfd, *argv, quotatype) == 0)
                        continue;
                if (editit(tmpfil) && readprivs(curprivs, tmpfil))
                        putprivs(id, curprivs);
                freeprivs(curprivs);
        }
        close(tmpfd);
        unlink(tmpfil);
        exit(0);
}

static void
usage(void)
{
        fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
                "usage: edquota [-uh] [-f fspath] [-p username] username ...",
                "       edquota [-u] -e fspath[:bslim[:bhlim[:islim[:ihlim]]]] [-e ...]",
                "               username ...",
                "       edquota -g [-h] [-f fspath] [-p groupname] groupname ...",
                "       edquota -g -e fspath[:bslim[:bhlim[:islim[:ihlim]]]] [-e ...]",
                "               groupname ...",
                "       edquota [-u] -t [-f fspath]",
                "       edquota -g -t [-f fspath]");
        exit(1);
}

/*
 * This routine converts a name for a particular quota type to
 * an identifier. This routine must agree with the kernel routine
 * getinoquota as to the interpretation of quota types.
 */
int
getentry(const char *name, int quotatype)
{
        struct passwd *pw;
        struct group *gr;

        if (alldigits(name))
                return (atoi(name));
        switch(quotatype) {
        case USRQUOTA:
                if ((pw = getpwnam(name)))
                        return (pw->pw_uid);
                warnx("%s: no such user", name);
                sleep(3);
                break;
        case GRPQUOTA:
                if ((gr = getgrnam(name)))
                        return (gr->gr_gid);
                warnx("%s: no such group", name);
                sleep(3);
                break;
        default:
                warnx("%d: unknown quota type", quotatype);
                sleep(3);
                break;
        }
        sleep(1);
        return (-1);
}

/*
 * Collect the requested quota information.
 */
struct quotause *
getprivs(long id, int quotatype, char *fspath)
{
        struct quotafile *qf;
        struct fstab *fs;
        struct quotause *qup, *quptail;
        struct quotause *quphead;

        setfsent();
        quphead = quptail = NULL;
        while ((fs = getfsent())) {
                if (fspath && *fspath && strcmp(fspath, fs->fs_spec) &&
                    strcmp(fspath, fs->fs_file))
                        continue;
                if (strcmp(fs->fs_vfstype, "ufs"))
                        continue;
                if ((qf = quota_open(fs, quotatype, O_CREAT|O_RDWR)) == NULL) {
                        if (errno != EOPNOTSUPP)
                                warn("cannot open quotas on %s", fs->fs_file);
                        continue;
                }
                if ((qup = (struct quotause *)calloc(1, sizeof(*qup))) == NULL)
                        errx(2, "out of memory");
                qup->qf = qf;
                strlcpy(qup->fsname, fs->fs_file, sizeof(qup->fsname));
                if (quota_read(qf, &qup->dqblk, id) == -1) {
                        warn("cannot read quotas on %s", fs->fs_file);
                        freeprivs(qup);
                        continue;
                }
                if (quphead == NULL)
                        quphead = qup;
                else
                        quptail->next = qup;
                quptail = qup;
                qup->next = 0;
        }
        if (quphead == NULL) {
                warnx("No quotas on %s", fspath ? fspath : "any filesystems");
        }
        endfsent();
        return (quphead);
}

/*
 * Store the requested quota information.
 */
void
putprivs(long id, struct quotause *quplist)
{
        struct quotause *qup;

        for (qup = quplist; qup; qup = qup->next)
                if (quota_write_limits(qup->qf, &qup->dqblk, id) == -1)
                        warn("%s", qup->fsname);
}

/*
 * Take a list of privileges and get it edited.
 */
int
editit(char *tmpf)
{
        long omask;
        int pid, status;

        omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
 top:
        if ((pid = fork()) < 0) {

                if (errno == EPROCLIM) {
                        warnx("you have too many processes");
                        return(0);
                }
                if (errno == EAGAIN) {
                        sleep(1);
                        goto top;
                }
                warn("fork");
                return (0);
        }
        if (pid == 0) {
                const char *ed;

                sigsetmask(omask);
                if (setgid(getgid()) != 0)
                        err(1, "setgid failed");
                if (setuid(getuid()) != 0)
                        err(1, "setuid failed");
                if ((ed = getenv("EDITOR")) == (char *)0)
                        ed = _PATH_VI;
                execlp(ed, ed, tmpf, (char *)0);
                err(1, "%s", ed);
        }
        waitpid(pid, &status, 0);
        sigsetmask(omask);
        if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
                return (0);
        return (1);
}

/*
 * Convert a quotause list to an ASCII file.
 */
int
writeprivs(struct quotause *quplist, int outfd, char *name, int quotatype)
{
        struct quotause *qup;
        FILE *fd;

        ftruncate(outfd, 0);
        lseek(outfd, 0, L_SET);
        if ((fd = fdopen(dup(outfd), "w")) == NULL)
                err(1, "%s", tmpfil);
        fprintf(fd, "Quotas for %s %s:\n", qfextension[quotatype], name);
        for (qup = quplist; qup; qup = qup->next) {
                fprintf(fd, "%s: in use: %s, ", qup->fsname,
                    fmthumanvalblks(qup->dqblk.dqb_curblocks));
                fprintf(fd, "limits (soft = %s, ",
                    fmthumanvalblks(qup->dqblk.dqb_bsoftlimit));
                fprintf(fd, "hard = %s)\n",
                    fmthumanvalblks(qup->dqblk.dqb_bhardlimit));
                fprintf(fd, "\tinodes in use: %s, ",
                    fmthumanvalinos(qup->dqblk.dqb_curinodes));
                fprintf(fd, "limits (soft = %s, ",
                    fmthumanvalinos(qup->dqblk.dqb_isoftlimit));
                fprintf(fd, "hard = %s)\n",
                    fmthumanvalinos(qup->dqblk.dqb_ihardlimit));
        }
        fclose(fd);
        return (1);
}

char *
fmthumanvalblks(int64_t blocks)
{
        static char numbuf[20];

        if (hflag) {
                humanize_number(numbuf, blocks < 0 ? 7 : 6,
                    dbtob(blocks), "", HN_AUTOSCALE, HN_NOSPACE);
                return (numbuf);
        }
        snprintf(numbuf, sizeof(numbuf), "%juk", (uintmax_t)dbtokb(blocks));
        return(numbuf);
}

char *
fmthumanvalinos(int64_t inos)
{
        static char numbuf[20];

        if (hflag) {
                humanize_number(numbuf, inos < 0 ? 7 : 6,
                    inos, "", HN_AUTOSCALE, HN_NOSPACE | HN_DIVISOR_1000);
                return (numbuf);
        }
        snprintf(numbuf, sizeof(numbuf), "%ju", (uintmax_t)inos);
        return(numbuf);
}

/*
 * Merge changes to an ASCII file into a quotause list.
 */
int
readprivs(struct quotause *quplist, char *inname)
{
        struct quotause *qup;
        FILE *fd;
        uintmax_t hardlimit, softlimit, curitems;
        char hardunits, softunits, curitemunits;
        int cnt;
        char *cp;
        struct dqblk dqblk;
        char *fsp, line1[BUFSIZ], line2[BUFSIZ];

        fd = fopen(inname, "r");
        if (fd == NULL) {
                warnx("can't re-read temp file!!");
                return (0);
        }
        /*
         * Discard title line, then read pairs of lines to process.
         */
        (void) fgets(line1, sizeof (line1), fd);
        while (fgets(line1, sizeof (line1), fd) != NULL &&
               fgets(line2, sizeof (line2), fd) != NULL) {
                if ((fsp = strtok(line1, " \t:")) == NULL) {
                        warnx("%s: bad format", line1);
                        return (0);
                }
                if ((cp = strtok((char *)0, "\n")) == NULL) {
                        warnx("%s: %s: bad format", fsp, &fsp[strlen(fsp) + 1]);
                        return (0);
                }
                cnt = sscanf(cp,
                    " in use: %ju%c, limits (soft = %ju%c, hard = %ju%c)",
                    &curitems, &curitemunits, &softlimit, &softunits,
                    &hardlimit, &hardunits);
                /*
                 * The next three check for old-style input formats.
                 */
                if (cnt != 6)
                        cnt = sscanf(cp,
                         " in use: %ju%c, limits (soft = %ju%c hard = %ju%c",
                            &curitems, &curitemunits, &softlimit,
                            &softunits, &hardlimit, &hardunits);
                if (cnt != 6)
                        cnt = sscanf(cp,
                        " in use: %ju%c, limits (soft = %ju%c hard = %ju%c)",
                            &curitems, &curitemunits, &softlimit,
                            &softunits, &hardlimit, &hardunits);
                if (cnt != 6)
                        cnt = sscanf(cp,
                        " in use: %ju%c, limits (soft = %ju%c, hard = %ju%c",
                            &curitems, &curitemunits, &softlimit,
                            &softunits, &hardlimit, &hardunits);
                if (cnt != 6) {
                        warnx("%s:%s: bad format", fsp, cp);
                        return (0);
                }
                dqblk.dqb_curblocks = cvtblkval(curitems, curitemunits,
                    "current block count");
                dqblk.dqb_bsoftlimit = cvtblkval(softlimit, softunits,
                    "block soft limit");
                dqblk.dqb_bhardlimit = cvtblkval(hardlimit, hardunits,
                    "block hard limit");
                if ((cp = strtok(line2, "\n")) == NULL) {
                        warnx("%s: %s: bad format", fsp, line2);
                        return (0);
                }
                cnt = sscanf(&cp[7],
                    " in use: %ju%c limits (soft = %ju%c, hard = %ju%c)",
                    &curitems, &curitemunits, &softlimit,
                    &softunits, &hardlimit, &hardunits);
                /*
                 * The next three check for old-style input formats.
                 */
                if (cnt != 6)
                        cnt = sscanf(&cp[7],
                         " in use: %ju%c limits (soft = %ju%c hard = %ju%c",
                            &curitems, &curitemunits, &softlimit,
                            &softunits, &hardlimit, &hardunits);
                if (cnt != 6)
                        cnt = sscanf(&cp[7],
                        " in use: %ju%c limits (soft = %ju%c hard = %ju%c)",
                            &curitems, &curitemunits, &softlimit,
                            &softunits, &hardlimit, &hardunits);
                if (cnt != 6)
                        cnt = sscanf(&cp[7],
                        " in use: %ju%c limits (soft = %ju%c, hard = %ju%c",
                            &curitems, &curitemunits, &softlimit,
                            &softunits, &hardlimit, &hardunits);
                if (cnt != 6) {
                        warnx("%s: %s: bad format cnt %d", fsp, &cp[7], cnt);
                        return (0);
                }
                dqblk.dqb_curinodes = cvtinoval(curitems, curitemunits,
                    "current inode count");
                dqblk.dqb_isoftlimit = cvtinoval(softlimit, softunits,
                    "inode soft limit");
                dqblk.dqb_ihardlimit = cvtinoval(hardlimit, hardunits,
                    "inode hard limit");
                for (qup = quplist; qup; qup = qup->next) {
                        if (strcmp(fsp, qup->fsname))
                                continue;
                        /*
                         * Cause time limit to be reset when the quota
                         * is next used if previously had no soft limit
                         * or were under it, but now have a soft limit
                         * and are over it.
                         */
                        if (dqblk.dqb_bsoftlimit &&
                            qup->dqblk.dqb_curblocks >= dqblk.dqb_bsoftlimit &&
                            (qup->dqblk.dqb_bsoftlimit == 0 ||
                             qup->dqblk.dqb_curblocks <
                             qup->dqblk.dqb_bsoftlimit))
                                qup->dqblk.dqb_btime = 0;
                        if (dqblk.dqb_isoftlimit &&
                            qup->dqblk.dqb_curinodes >= dqblk.dqb_isoftlimit &&
                            (qup->dqblk.dqb_isoftlimit == 0 ||
                             qup->dqblk.dqb_curinodes <
                             qup->dqblk.dqb_isoftlimit))
                                qup->dqblk.dqb_itime = 0;
                        qup->dqblk.dqb_bsoftlimit = dqblk.dqb_bsoftlimit;
                        qup->dqblk.dqb_bhardlimit = dqblk.dqb_bhardlimit;
                        qup->dqblk.dqb_isoftlimit = dqblk.dqb_isoftlimit;
                        qup->dqblk.dqb_ihardlimit = dqblk.dqb_ihardlimit;
                        qup->flags |= FOUND;
                        /* Humanized input returns only approximate counts */
                        if (hflag ||
                            (dqblk.dqb_curblocks == qup->dqblk.dqb_curblocks &&
                             dqblk.dqb_curinodes == qup->dqblk.dqb_curinodes))
                                break;
                        warnx("%s: cannot change current allocation", fsp);
                        break;
                }
        }
        fclose(fd);
        /*
         * Disable quotas for any filesystems that have not been found.
         */
        for (qup = quplist; qup; qup = qup->next) {
                if (qup->flags & FOUND) {
                        qup->flags &= ~FOUND;
                        continue;
                }
                qup->dqblk.dqb_bsoftlimit = 0;
                qup->dqblk.dqb_bhardlimit = 0;
                qup->dqblk.dqb_isoftlimit = 0;
                qup->dqblk.dqb_ihardlimit = 0;
        }
        return (1);
}

/*
 * Convert a quotause list to an ASCII file of grace times.
 */
int
writetimes(struct quotause *quplist, int outfd, int quotatype)
{
        struct quotause *qup;
        FILE *fd;

        ftruncate(outfd, 0);
        lseek(outfd, 0, L_SET);
        if ((fd = fdopen(dup(outfd), "w")) == NULL)
                err(1, "%s", tmpfil);
        fprintf(fd, "Time units may be: days, hours, minutes, or seconds\n");
        fprintf(fd, "Grace period before enforcing soft limits for %ss:\n",
            qfextension[quotatype]);
        for (qup = quplist; qup; qup = qup->next) {
                fprintf(fd, "%s: block grace period: %s, ",
                    qup->fsname, cvtstoa(qup->dqblk.dqb_btime));
                fprintf(fd, "file grace period: %s\n",
                    cvtstoa(qup->dqblk.dqb_itime));
        }
        fclose(fd);
        return (1);
}

/*
 * Merge changes of grace times in an ASCII file into a quotause list.
 */
int
readtimes(struct quotause *quplist, char *inname)
{
        struct quotause *qup;
        FILE *fd;
        int cnt;
        char *cp;
        uintmax_t itime, btime, iseconds, bseconds;
        char *fsp, bunits[10], iunits[10], line1[BUFSIZ];

        fd = fopen(inname, "r");
        if (fd == NULL) {
                warnx("can't re-read temp file!!");
                return (0);
        }
        /*
         * Discard two title lines, then read lines to process.
         */
        (void) fgets(line1, sizeof (line1), fd);
        (void) fgets(line1, sizeof (line1), fd);
        while (fgets(line1, sizeof (line1), fd) != NULL) {
                if ((fsp = strtok(line1, " \t:")) == NULL) {
                        warnx("%s: bad format", line1);
                        return (0);
                }
                if ((cp = strtok((char *)0, "\n")) == NULL) {
                        warnx("%s: %s: bad format", fsp, &fsp[strlen(fsp) + 1]);
                        return (0);
                }
                cnt = sscanf(cp,
                    " block grace period: %ju %s file grace period: %ju %s",
                    &btime, bunits, &itime, iunits);
                if (cnt != 4) {
                        warnx("%s:%s: bad format", fsp, cp);
                        return (0);
                }
                if (cvtatos(btime, bunits, &bseconds) == 0)
                        return (0);
                if (cvtatos(itime, iunits, &iseconds) == 0)
                        return (0);
                for (qup = quplist; qup; qup = qup->next) {
                        if (strcmp(fsp, qup->fsname))
                                continue;
                        qup->dqblk.dqb_btime = bseconds;
                        qup->dqblk.dqb_itime = iseconds;
                        qup->flags |= FOUND;
                        break;
                }
        }
        fclose(fd);
        /*
         * reset default grace periods for any filesystems
         * that have not been found.
         */
        for (qup = quplist; qup; qup = qup->next) {
                if (qup->flags & FOUND) {
                        qup->flags &= ~FOUND;
                        continue;
                }
                qup->dqblk.dqb_btime = 0;
                qup->dqblk.dqb_itime = 0;
        }
        return (1);
}

/*
 * Convert seconds to ASCII times.
 */
char *
cvtstoa(uint64_t secs)
{
        static char buf[20];

        if (secs % (24 * 60 * 60) == 0) {
                secs /= 24 * 60 * 60;
                sprintf(buf, "%ju day%s", (uintmax_t)secs,
                    secs == 1 ? "" : "s");
        } else if (secs % (60 * 60) == 0) {
                secs /= 60 * 60;
                sprintf(buf, "%ju hour%s", (uintmax_t)secs,
                    secs == 1 ? "" : "s");
        } else if (secs % 60 == 0) {
                secs /= 60;
                sprintf(buf, "%ju minute%s", (uintmax_t)secs,
                    secs == 1 ? "" : "s");
        } else
                sprintf(buf, "%ju second%s", (uintmax_t)secs,
                    secs == 1 ? "" : "s");
        return (buf);
}

/*
 * Convert ASCII input times to seconds.
 */
int
cvtatos(uint64_t period, char *units, uint64_t *seconds)
{

        if (bcmp(units, "second", 6) == 0)
                *seconds = period;
        else if (bcmp(units, "minute", 6) == 0)
                *seconds = period * 60;
        else if (bcmp(units, "hour", 4) == 0)
                *seconds = period * 60 * 60;
        else if (bcmp(units, "day", 3) == 0)
                *seconds = period * 24 * 60 * 60;
        else {
                warnx("%s: bad units, specify %s\n", units,
                    "days, hours, minutes, or seconds");
                return (0);
        }
        return (1);
}

/*
 * Convert a limit to number of disk blocks.
 */
uint64_t
cvtblkval(uint64_t limit, char units, const char *itemname)
{

        switch(units) {
        case 'B':
        case 'b':
                limit = btodb(limit);
                break;
        case '\0':      /* historic behavior */
        case ',':       /* historic behavior */
        case ')':       /* historic behavior */
        case 'K':
        case 'k':
                limit *= btodb(1024);
                break;
        case 'M':
        case 'm':
                limit *= btodb(1048576);
                break;
        case 'G':
        case 'g':
                limit *= btodb(1073741824);
                break;
        case 'T':
        case 't':
                limit *= btodb(1099511627776);
                break;
        case 'P':
        case 'p':
                limit *= btodb(1125899906842624);
                break;
        case 'E':
        case 'e':
                limit *= btodb(1152921504606846976);
                break;
        case ' ':
                errx(2, "No space permitted between value and units for %s\n",
                    itemname);
                break;
        default:
                errx(2, "%ju%c: unknown units for %s, specify "
                    "none, K, M, G, T, P, or E\n",
                    (uintmax_t)limit, units, itemname);
                break;
        }
        return (limit);
}

/*
 * Convert a limit to number of inodes.
 */
uint64_t
cvtinoval(uint64_t limit, char units, const char *itemname)
{

        switch(units) {
        case 'B':
        case 'b':
        case '\0':      /* historic behavior */
        case ',':       /* historic behavior */
        case ')':       /* historic behavior */
                break;
        case 'K':
        case 'k':
                limit *= 1000;
                break;
        case 'M':
        case 'm':
                limit *= 1000000;
                break;
        case 'G':
        case 'g':
                limit *= 1000000000;
                break;
        case 'T':
        case 't':
                limit *= 1000000000000;
                break;
        case 'P':
        case 'p':
                limit *= 1000000000000000;
                break;
        case 'E':
        case 'e':
                limit *= 1000000000000000000;
                break;
        case ' ':
                errx(2, "No space permitted between value and units for %s\n",
                    itemname);
                break;
        default:
                errx(2, "%ju%c: unknown units for %s, specify "
                    "none, K, M, G, T, P, or E\n",
                    (uintmax_t)limit, units, itemname);
                break;
        }
        return (limit);
}

/*
 * Free a list of quotause structures.
 */
void
freeprivs(struct quotause *quplist)
{
        struct quotause *qup, *nextqup;

        for (qup = quplist; qup; qup = nextqup) {
                quota_close(qup->qf);
                nextqup = qup->next;
                free(qup);
        }
}

/*
 * Check whether a string is completely composed of digits.
 */
int
alldigits(const char *s)
{
        int c;

        c = *s++;
        do {
                if (!isdigit(c))
                        return (0);
        } while ((c = *s++));
        return (1);
}