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edquota.c

/*
 * Copyright (c) 2002-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by the University of
 *    California, Berkeley and its contributors.
 * 4. 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.
 */

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1980, 1990, 1993\n\
      The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)edquota.c     8.3 (Berkeley) 4/27/95";
#endif /* not lint */

/*
 * Disk quota editor.
 */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/file.h>
#ifdef __APPLE__
#include <sys/mount.h>
#endif /* __APPLE__ */
#include <sys/wait.h>
#include <sys/queue.h>
#include <sys/quota.h>
#include <errno.h>
#include <fstab.h>
#include <pwd.h>
#include <grp.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "pathnames.h"

#ifdef __APPLE__
#include <libkern/OSByteOrder.h>
#endif /* __APPLE__ */

char *qfname = QUOTAFILENAME;
char *qfextension[] = INITQFNAMES;
char *quotagroup = QUOTAGROUP;
char tmpfil[] = _PATH_TMP;

#ifdef __APPLE__
u_int32_t quotamagic[MAXQUOTAS] = INITQMAGICS;
#endif /* __APPLE__ */

struct quotause {
      struct      quotause *next;
      long  flags;
      struct      dqblk dqblk;
      char  fsname[MAXPATHLEN + 1];
      char  qfname[1];  /* actually longer */
} *getprivs();
#define     FOUND 0x01

int   alldigits __P((char *));
int   cvtatos __P((time_t, char *, time_t *));
int   editit __P((char *));
void  freeprivs __P((struct quotause *));
int   getentry __P((char *, int));
int   hasquota __P((struct statfs *, int, char **));
void  putprivs __P((long, int, struct quotause *));
int   readprivs __P((struct quotause *, int));
int   readtimes __P((struct quotause *, int));
void  usage __P((void));
int   writeprivs __P((struct quotause *, int, char *, int));
int   writetimes __P((struct quotause *, int, int));

#ifdef __APPLE__
int   qfinit(int, struct statfs *, int);
int   qflookup(int, u_long, int, struct dqblk *);
int   qfupdate(int, u_long, int, struct dqblk *);
#endif /* __APPLE__ */


int
main(argc, argv)
      register char **argv;
      int argc;
{
      register struct quotause *qup, *protoprivs, *curprivs;
      extern char *optarg;
      extern int optind;
      register long id, protoid;
      register int quotatype, tmpfd;
      char *protoname = NULL, ch;
      int tflag = 0, pflag = 0;

      if (argc < 2)
            usage();
      if (getuid()) {
            fprintf(stderr, "edquota: permission denied\n");
            exit(1);
      }
      quotatype = USRQUOTA;

      while ((ch = getopt(argc, argv, "ugtp:")) != EOF) {
            switch(ch) {
            case 'p':
                  protoname = optarg;
                  pflag++;
                  break;
            case 'g':
                  quotatype = GRPQUOTA;
                  break;
            case 'u':
                  quotatype = USRQUOTA;
                  break;
            case 't':
                  tflag++;
                  break;
            default:
                  usage();
            }
      }
      argc -= optind;
      argv += optind;
      if (pflag) {
            if ((protoid = getentry(protoname, quotatype)) == -1)
                  exit(1);
            protoprivs = getprivs(protoid, quotatype);
#ifdef __APPLE__
            if (protoprivs == (struct quotause *) NULL)
                  exit(0);
#endif /* __APPLE__ */
            for (qup = protoprivs; qup; qup = qup->next) {
                  qup->dqblk.dqb_btime = 0;
                  qup->dqblk.dqb_itime = 0;
            }
            while (argc-- > 0) {
                  if ((id = getentry(*argv++, quotatype)) < 0)
                        continue;
                  putprivs(id, quotatype, protoprivs);
            }
            exit(0);
      }
      tmpfd = mkstemp(tmpfil);
      fchown(tmpfd, getuid(), getgid());
      if (tflag) {
            protoprivs = getprivs(0, quotatype);
#ifdef __APPLE__
            if (protoprivs == (struct quotause *) NULL)
              exit(0);
#endif /* __APPLE__ */
            if (writetimes(protoprivs, tmpfd, quotatype) == 0)
                  exit(1);
            if (editit(tmpfil)) {
                  /*
                   * Re-open tmpfil to be editor independent.
                   */
                  close(tmpfd);
                  tmpfd = open(tmpfil, O_RDWR, 0);
                  if (tmpfd < 0) {
                        freeprivs(protoprivs);
                        unlink(tmpfil);
                        exit(1);
                  }
                  if (readtimes(protoprivs, tmpfd))
                        putprivs(0, quotatype, protoprivs);
            }
            freeprivs(protoprivs);
            exit(0);
      }
      for ( ; argc > 0; argc--, argv++) {
            if ((id = getentry(*argv, quotatype)) == -1)
                  continue;
            curprivs = getprivs(id, quotatype);
#ifdef __APPLE__
            if (curprivs == (struct quotause *) NULL)
              exit(0);
#endif /* __APPLE__ */


            if (writeprivs(curprivs, tmpfd, *argv, quotatype) == 0) {
                  freeprivs(curprivs);
                  continue;
            }
            if (editit(tmpfil)) {
                  /*
                   * Re-open tmpfil to be editor independent.
                   */
                  close(tmpfd);
                  tmpfd = open(tmpfil, O_RDWR, 0);
                  if (tmpfd < 0) {
                        freeprivs(curprivs);
                        unlink(tmpfil);
                        exit(1);
                  }
                  if (readprivs(curprivs, tmpfd))
                        putprivs(id, quotatype, curprivs);
            }
            freeprivs(curprivs);
      }
      close(tmpfd);
      unlink(tmpfil);
      exit(0);
}

void
usage()
{
      fprintf(stderr, "%s%s%s%s",
            "Usage: edquota [-u] [-p username] username ...\n",
            "\tedquota -g [-p groupname] groupname ...\n",
            "\tedquota [-u] -t\n", "\tedquota -g -t\n");
#ifdef __APPLE__
      fprintf(stderr, "\nQuota file editing triggers only on filesystems with a\n");
      fprintf(stderr, "%s.%s or %s.%s file located at its root.\n", 
            QUOTAOPSNAME, qfextension[USRQUOTA],
            QUOTAOPSNAME, qfextension[GRPQUOTA]);
#endif /* __APPLE__ */
      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(name, quotatype)
      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);
            fprintf(stderr, "%s: no such user\n", name);
            break;
      case GRPQUOTA:
            if (gr = getgrnam(name))
                  return (gr->gr_gid);
            fprintf(stderr, "%s: no such group\n", name);
            break;
      default:
            fprintf(stderr, "%d: unknown quota type\n", quotatype);
            break;
      }
      sleep(1);
      return (-1);
}

/*
 * Collect the requested quota information.
 */
#ifdef __APPLE__
struct quotause *
getprivs(id, quotatype)
      register long id;
      int quotatype;
{
      struct statfs *fst;
      register struct quotause *qup, *quptail;
      struct quotause *quphead;
      int qcmd, qupsize, fd;
      char *qfpathname;
      static int warned = 0;
      int nfst, i;
      extern int errno;


      quptail = quphead = (struct quotause *)0;
      qcmd = QCMD(Q_GETQUOTA, quotatype);

      nfst = getmntinfo(&fst, MNT_WAIT);
        if (nfst==0) {
        fprintf(stderr, "edquota: no mounted filesystems\n");
        exit(1);
        }

      for (i=0; i<nfst; i++) {
              if (strcmp(fst[i].f_fstypename, "hfs")) {
                if (strcmp(fst[i].f_fstypename, "ufs"))
                    continue;
            }
            if (!hasquota(&fst[i], quotatype, &qfpathname))
                  continue;
            qupsize = sizeof(*qup) + strlen(qfpathname);
            if ((qup = (struct quotause *)malloc(qupsize)) == NULL) {
                  fprintf(stderr, "edquota: out of memory\n");
                  exit(2);
            }
            if (quotactl(fst[i].f_mntonname, qcmd, id, (char *)&qup->dqblk) != 0) {
                  if (errno == EOPNOTSUPP && !warned) {
                        warned++;
                        fprintf(stderr, "Warning: %s\n",
                            "Quotas are not compiled into this kernel");
                        sleep(3);
                  }
                  if ((fd = open(qfpathname, O_RDONLY)) < 0) {
                        fd = open(qfpathname, O_RDWR|O_CREAT, 0640);
                        if (fd < 0 && errno != ENOENT) {
                              perror(qfpathname);
                              free(qup);
                              continue;
                        }
                        fprintf(stderr, "Creating quota file %s\n",
                            qfpathname);
                        sleep(3);
                        (void) fchown(fd, getuid(),
                            getentry(quotagroup, GRPQUOTA));
                        (void) fchmod(fd, 0640);
                        if (qfinit(fd, &fst[i], quotatype)) {     
                              perror(qfpathname);
                              close(fd);
                              free(qup);
                              continue;
                        }
                  }
                  if (qflookup(fd, id, quotatype, &qup->dqblk) != 0) {
                        fprintf(stderr, "edquota: lookup error in ");
                        perror(qfpathname);
                        close(fd);
                        free(qup);
                        continue;
                  }
                  close(fd);
            }
            strcpy(qup->qfname, qfpathname);
            strcpy(qup->fsname, fst[i].f_mntonname);

            if (quphead == NULL)
                  quphead = qup;
            else
                  quptail->next = qup;
            quptail = qup;
            qup->next = 0;
      }
      return (quphead);
}
#else
struct quotause *
getprivs(id, quotatype)
      register long id;
      int quotatype;
{
      register struct fstab *fs;
      register struct quotause *qup, *quptail;
      struct quotause *quphead;
      int qcmd, qupsize, fd;
      char *qfpathname;
      static int warned = 0;
      extern int errno;

      setfsent();
      quphead = (struct quotause *)0;
      qcmd = QCMD(Q_GETQUOTA, quotatype);
      while (fs = getfsent()) {
            if (strcmp(fs->fs_vfstype, "ufs"))
                  continue;
            if (!hasquota(fs, quotatype, &qfpathname))
                  continue;
            qupsize = sizeof(*qup) + strlen(qfpathname);
            if ((qup = (struct quotause *)malloc(qupsize)) == NULL) {
                  fprintf(stderr, "edquota: out of memory\n");
                  exit(2);
            }
            if (quotactl(fs->fs_file, qcmd, id, &qup->dqblk) != 0) {
                  if (errno == EOPNOTSUPP && !warned) {
                        warned++;
                        fprintf(stderr, "Warning: %s\n",
                            "Quotas are not compiled into this kernel");
                        sleep(3);
                  }
                  if ((fd = open(qfpathname, O_RDONLY)) < 0) {
                        fd = open(qfpathname, O_RDWR|O_CREAT, 0640);
                        if (fd < 0 && errno != ENOENT) {
                              perror(qfpathname);
                              free(qup);
                              continue;
                        }
                        fprintf(stderr, "Creating quota file %s\n",
                            qfpathname);
                        sleep(3);
                        (void) fchown(fd, getuid(),
                            getentry(quotagroup, GRPQUOTA));
                        (void) fchmod(fd, 0640);
                  }
                  lseek(fd, (off_t)(id * sizeof(struct dqblk)), L_SET);
                  switch (read(fd, &qup->dqblk, sizeof(struct dqblk))) {
                  case 0:                 /* EOF */
                        /*
                         * Convert implicit 0 quota (EOF)
                         * into an explicit one (zero'ed dqblk)
                         */
                        bzero((caddr_t)&qup->dqblk,
                            sizeof(struct dqblk));
                        break;

                  case sizeof(struct dqblk):    /* OK */
                        break;

                  default:          /* ERROR */
                        fprintf(stderr, "edquota: read error in ");
                        perror(qfpathname);
                        close(fd);
                        free(qup);
                        continue;
                  }
                  close(fd);
            }
            strcpy(qup->qfname, qfpathname);
            strcpy(qup->fsname, fs->fs_file);
            if (quphead == NULL)
                  quphead = qup;
            else
                  quptail->next = qup;
            quptail = qup;
            qup->next = 0;
      }
      endfsent();
      return (quphead);
}
#endif /* __APPLE */

#ifdef __APPLE__
#define ONEGIGABYTE        (1024*1024*1024)
/*
 * Initialize a new quota file.
 */
int
qfinit(fd, fst, type)
      int fd;
      struct statfs *fst;
      int type;
{
      struct dqfilehdr dqhdr = {0};
      u_int64_t fs_size;
      int max = 0;

      /*
       * Calculate the size of the hash table from the size of
       * the file system.  Note that the open addressing hashing
       * used by the quota file assumes that this table will not
       * be more than 90% full.
       */
      fs_size = (u_int64_t)fst->f_blocks * (u_int64_t)fst->f_bsize;

      if (type == USRQUOTA) {
            max = QF_USERS_PER_GB * (fs_size / ONEGIGABYTE);

            if (max < QF_MIN_USERS)
                  max = QF_MIN_USERS;
            else if (max > QF_MAX_USERS)
                  max = QF_MAX_USERS;
      } else if (type == GRPQUOTA) {
            max = QF_GROUPS_PER_GB * (fs_size / ONEGIGABYTE);

            if (max < QF_MIN_GROUPS)
                  max = QF_MIN_GROUPS;
            else if (max > QF_MAX_GROUPS)
                  max = QF_MAX_GROUPS;
      }
      /* Round up to a power of 2 */
      if (max && !powerof2(max)) {
            int x = max;
            max = 4;
            while (x>>1 != 1) {
                  x = x >> 1;
                  max = max << 1;
            }
      }

      (void) ftruncate(fd, (off_t)((max + 1) * sizeof(struct dqblk)));
      dqhdr.dqh_magic      = OSSwapHostToBigInt32(quotamagic[type]);
      dqhdr.dqh_version    = OSSwapHostToBigConstInt32(QF_VERSION);
      dqhdr.dqh_maxentries = OSSwapHostToBigInt32(max);
      dqhdr.dqh_btime      = OSSwapHostToBigConstInt32(MAX_DQ_TIME);
      dqhdr.dqh_itime      = OSSwapHostToBigConstInt32(MAX_IQ_TIME);
      memmove(dqhdr.dqh_string, QF_STRING_TAG, strlen(QF_STRING_TAG));
      (void) lseek(fd, 0, L_SET);
      (void) write(fd, &dqhdr, sizeof(dqhdr));

      return (0);
}

/*
 * Lookup an entry in a quota file.
 */
int
qflookup(fd, id, type, dqbp)
      int fd;
      u_long id;
      int type;
      struct dqblk *dqbp;
{
      struct dqfilehdr dqhdr;
      int i, skip, last, m;
      u_long mask;

      bzero(dqbp, sizeof(struct dqblk));

      if (id == 0)
            return (0);

      lseek(fd, 0, L_SET);
      if (read(fd, &dqhdr, sizeof(struct dqfilehdr)) != sizeof(struct dqfilehdr))
            return (-1);

      /* Sanity check the quota file header. */
      if ((OSSwapBigToHostInt32(dqhdr.dqh_magic) != quotamagic[type]) ||
          (OSSwapBigToHostInt32(dqhdr.dqh_version) > 1) ||
          (!powerof2(OSSwapBigToHostInt32(dqhdr.dqh_maxentries)))) {
            fprintf(stderr, "quota: invalid quota file header\n");
            return (-1);
      }

      m = OSSwapBigToHostInt32(dqhdr.dqh_maxentries);
      mask = m - 1;
      i = dqhash1(id, dqhashshift(m), mask);
      skip = dqhash2(id, mask);

      for (last = (i + (m-1) * skip) & mask;
           i != last;
           i = (i + skip) & mask) {
            lseek(fd, dqoffset(i), L_SET);
            if (read(fd, dqbp, sizeof(struct dqblk)) < sizeof(struct dqblk))
                  return (-1);
            /*
             * Stop when an empty entry is found
             * or we encounter a matching id.
             */
            if (dqbp->dqb_id == 0 || OSSwapBigToHostInt32(dqbp->dqb_id) == id)
                  break;
      }
      /* Put data in host native byte order. */
      dqbp->dqb_bhardlimit = OSSwapBigToHostInt64(dqbp->dqb_bhardlimit);
      dqbp->dqb_bsoftlimit = OSSwapBigToHostInt64(dqbp->dqb_bsoftlimit);
      dqbp->dqb_curbytes   = OSSwapBigToHostInt64(dqbp->dqb_curbytes);
      dqbp->dqb_ihardlimit = OSSwapBigToHostInt32(dqbp->dqb_ihardlimit);
      dqbp->dqb_isoftlimit = OSSwapBigToHostInt32(dqbp->dqb_isoftlimit);
      dqbp->dqb_curinodes  = OSSwapBigToHostInt32(dqbp->dqb_curinodes);
      dqbp->dqb_btime      = OSSwapBigToHostInt32(dqbp->dqb_btime);
      dqbp->dqb_itime      = OSSwapBigToHostInt32(dqbp->dqb_itime);
      dqbp->dqb_id         = OSSwapBigToHostInt32(dqbp->dqb_id);

      return (0);
}
#endif /* __APPLE */


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

      qcmd = QCMD(Q_SETQUOTA, quotatype);
      for (qup = quplist; qup; qup = qup->next) {
            if (quotactl(qup->fsname, qcmd, id, (char *)&qup->dqblk) == 0)
                  continue;
#ifdef __APPLE__
            if ((fd = open(qup->qfname, O_RDWR)) < 0) {
                  perror(qup->qfname);
            } else {
                  if (qfupdate(fd, id, quotatype, &qup->dqblk) != 0) {
                        fprintf(stderr, "edquota: ");
                        perror(qup->qfname);
                  }
#else
            if ((fd = open(qup->qfname, O_WRONLY)) < 0) {
                  perror(qup->qfname);
            } else {
                  lseek(fd,
                      (off_t)(id * (long)sizeof (struct dqblk)), L_SET);
                  if (write(fd, &qup->dqblk, sizeof (struct dqblk)) !=
                      sizeof (struct dqblk)) {
                        fprintf(stderr, "edquota: ");
                        perror(qup->qfname);
                  }
#endif /* __APPLE */
                  close(fd);
            }
      }
}

#ifdef __APPLE__
/*
 * Update an entry in a quota file.
 */
int
qfupdate(fd, id, type, dqbp)
      int fd;
      u_long id;
      int type;
      struct dqblk *dqbp;
{
      struct dqblk dqbuf;
      struct dqfilehdr dqhdr;
      int i, skip, last, m;
      u_long mask;

      if (id == 0)
            return (0);

      lseek(fd, 0, L_SET);
      if (read(fd, &dqhdr, sizeof(struct dqfilehdr)) != sizeof(struct dqfilehdr))
            return (-1);

      /* Sanity check the quota file header. */
      if ((OSSwapBigToHostInt32(dqhdr.dqh_magic) != quotamagic[type]) ||
          (OSSwapBigToHostInt32(dqhdr.dqh_version) > QF_VERSION) ||
          (!powerof2(OSSwapBigToHostInt32(dqhdr.dqh_maxentries)))) {
            fprintf(stderr, "quota: invalid quota file header\n");
            return (EINVAL);
      }

      m = OSSwapBigToHostInt32(dqhdr.dqh_maxentries);
      mask = m - 1;
      i = dqhash1(id, dqhashshift(m), mask);
      skip = dqhash2(id, mask);

      for (last = (i + (m-1) * skip) & mask;
           i != last;
           i = (i + skip) & mask) {
            lseek(fd, dqoffset(i), L_SET);
            if (read(fd, &dqbuf, sizeof(struct dqblk)) < sizeof(struct dqblk))
                  return (-1);
            /*
             * Stop when an empty entry is found
             * or we encounter a matching id.
             */
            if (dqbuf.dqb_id == 0 || OSSwapBigToHostInt32(dqbuf.dqb_id) == id) {

                  /* Convert buffer to big endian before writing. */
                  dqbp->dqb_bhardlimit = OSSwapHostToBigInt64(dqbp->dqb_bhardlimit);
                  dqbp->dqb_bsoftlimit = OSSwapHostToBigInt64(dqbp->dqb_bsoftlimit);
                  dqbp->dqb_curbytes   = OSSwapHostToBigInt64(dqbp->dqb_curbytes);
                  dqbp->dqb_ihardlimit = OSSwapHostToBigInt32(dqbp->dqb_ihardlimit);
                  dqbp->dqb_isoftlimit = OSSwapHostToBigInt32(dqbp->dqb_isoftlimit);
                  dqbp->dqb_curinodes  = OSSwapHostToBigInt32(dqbp->dqb_curinodes);
                  dqbp->dqb_btime      = OSSwapHostToBigInt32(dqbp->dqb_btime);
                  dqbp->dqb_itime      = OSSwapHostToBigInt32(dqbp->dqb_itime);
                  dqbp->dqb_id         = OSSwapHostToBigInt32(id);

                  lseek(fd, dqoffset(i), L_SET);
                  if (write(fd, dqbp, sizeof (struct dqblk)) !=
                      sizeof (struct dqblk)) {
                        return (-1);
                  }
                  return (0);
            }
      }
      errno = ENOSPC;
      return (-1);
}
#endif /* __APPLE__ */

/*
 * Take a list of priviledges and get it edited.
 */
int
editit(tmpfile)
      char *tmpfile;
{
      long omask;
      int pid, stat;
      extern char *getenv();

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

            if (errno == EPROCLIM) {
                  fprintf(stderr, "You have too many processes\n");
                  return(0);
            }
            if (errno == EAGAIN) {
                  sleep(1);
                  goto top;
            }
            perror("fork");
            return (0);
      }
      if (pid == 0) {
            register char *ed;

            sigsetmask(omask);
            setgid(getgid());
            setuid(getuid());
            if ((ed = getenv("EDITOR")) == (char *)0)
                  ed = _PATH_VI;
            execlp(ed, ed, tmpfile, NULL);
            perror(ed);
            exit(1);
      }
      waitpid(pid, &stat, 0);
      sigsetmask(omask);
      if (!WIFEXITED(stat) || WEXITSTATUS(stat) != 0)
            return (0);
      return (1);
}

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

      ftruncate(outfd, 0);
      lseek(outfd, 0, L_SET);
      if ((fd = fdopen(dup(outfd), "w")) == NULL) {
            fprintf(stderr, "edquota: ");
            perror(tmpfil);
            exit(1);
      }
      fprintf(fd, "Quotas for %s %s:\n", qfextension[quotatype], name);
      for (qup = quplist; qup; qup = qup->next) {
#ifdef __APPLE__
              fprintf(fd, "%s: %s %qd, limits (soft = %qd, hard = %qd)\n",
                qup->fsname, "1K blocks in use:",
                qup->dqblk.dqb_curbytes / 1024,
                qup->dqblk.dqb_bsoftlimit / 1024,
                qup->dqblk.dqb_bhardlimit / 1024);
#else
            fprintf(fd, "%s: %s %d, limits (soft = %d, hard = %d)\n",
                qup->fsname, "blocks in use:",
                dbtob(qup->dqblk.dqb_curblocks) / 1024,
                dbtob(qup->dqblk.dqb_bsoftlimit) / 1024,
                dbtob(qup->dqblk.dqb_bhardlimit) / 1024);
#endif /* __APPLE__ */

            fprintf(fd, "%s %d, limits (soft = %d, hard = %d)\n",
                "\tinodes in use:", qup->dqblk.dqb_curinodes,
                qup->dqblk.dqb_isoftlimit, qup->dqblk.dqb_ihardlimit);
      }
      fclose(fd);
      return (1);
}

/*
 * Merge changes to an ASCII file into a quotause list.
 */
int
readprivs(quplist, infd)
      struct quotause *quplist;
      int infd;
{
      register struct quotause *qup;
      FILE *fd;
      int cnt;
      register char *cp;
      struct dqblk dqblk;
      char *fsp, line1[BUFSIZ], line2[BUFSIZ];

      lseek(infd, 0, L_SET);
      fd = fdopen(dup(infd), "r");
      if (fd == NULL) {
            fprintf(stderr, "Can't re-read temp file!!\n");
            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) {
                  fprintf(stderr, "%s: bad format\n", line1);
                  return (0);
            }
            if ((cp = strtok((char *)0, "\n")) == NULL) {
                  fprintf(stderr, "%s: %s: bad format\n", fsp,
                      &fsp[strlen(fsp) + 1]);
                  return (0);
            }
#ifdef __APPLE__
            /* We expect input to be in 1K blocks */
            cnt = sscanf(cp,
                         " 1K blocks in use: %qd, limits (soft = %qd, hard = %qd)",
                         &dqblk.dqb_curbytes, &dqblk.dqb_bsoftlimit,
                         &dqblk.dqb_bhardlimit);
            if (cnt != 3) {
                  fprintf(stderr, "%s:%s: bad format\n", fsp, cp);
                  return (0);
            }

            /* convert default 1K blocks to byte count */
            dqblk.dqb_curbytes = dqblk.dqb_curbytes * 1024;
            dqblk.dqb_bsoftlimit = dqblk.dqb_bsoftlimit * 1024;
            dqblk.dqb_bhardlimit = dqblk.dqb_bhardlimit * 1024;
#else
            cnt = sscanf(cp,
                " blocks in use: %d, limits (soft = %d, hard = %d)",
                &dqblk.dqb_curblocks, &dqblk.dqb_bsoftlimit,
                &dqblk.dqb_bhardlimit);
            if (cnt != 3) {
                  fprintf(stderr, "%s:%s: bad format\n", fsp, cp);
                  return (0);
            }
            dqblk.dqb_curblocks = btodb(dqblk.dqb_curblocks * 1024);
            dqblk.dqb_bsoftlimit = btodb(dqblk.dqb_bsoftlimit * 1024);
            dqblk.dqb_bhardlimit = btodb(dqblk.dqb_bhardlimit * 1024);
#endif /* __APPLE__ */

            if ((cp = strtok(line2, "\n")) == NULL) {
                  fprintf(stderr, "%s: %s: bad format\n", fsp, line2);
                  return (0);
            }
            cnt = sscanf(cp,
                "\tinodes in use: %d, limits (soft = %d, hard = %d)",
                &dqblk.dqb_curinodes, &dqblk.dqb_isoftlimit,
                &dqblk.dqb_ihardlimit);
            if (cnt != 3) {
                  fprintf(stderr, "%s: %s: bad format\n", fsp, line2);
                  return (0);
            }
            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.
                   */
#ifdef __APPLE__
                  if (dqblk.dqb_bsoftlimit &&
                      qup->dqblk.dqb_curbytes >= dqblk.dqb_bsoftlimit &&
                      (qup->dqblk.dqb_bsoftlimit == 0 ||
                       qup->dqblk.dqb_curbytes <
                       qup->dqblk.dqb_bsoftlimit))
                        qup->dqblk.dqb_btime = 0;
#else
                  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;
#endif /* __APPLE__ */
                  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;
#ifdef __APPLE__
                  if (dqblk.dqb_curbytes == qup->dqblk.dqb_curbytes &&
                      dqblk.dqb_curinodes == qup->dqblk.dqb_curinodes)
                        break;
#else
                  if (dqblk.dqb_curblocks == qup->dqblk.dqb_curblocks &&
                      dqblk.dqb_curinodes == qup->dqblk.dqb_curinodes)
                        break;
#endif /* __APPLE__ */
                  fprintf(stderr,
                      "%s: cannot change current allocation\n", 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(quplist, outfd, quotatype)
      struct quotause *quplist;
      int outfd;
      int quotatype;
{
      register struct quotause *qup;
      char *cvtstoa();
      FILE *fd;

      ftruncate(outfd, 0);
      lseek(outfd, 0, L_SET);
      if ((fd = fdopen(dup(outfd), "w")) == NULL) {
            fprintf(stderr, "edquota: ");
            perror(tmpfil);
            exit(1);
      }
      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(quplist, infd)
      struct quotause *quplist;
      int infd;
{
      register struct quotause *qup;
      FILE *fd;
      int cnt;
      register char *cp;
      time_t itime, btime, iseconds, bseconds;
      char *fsp, bunits[10], iunits[10], line1[BUFSIZ];

      lseek(infd, 0, L_SET);
      fd = fdopen(dup(infd), "r");
      if (fd == NULL) {
            fprintf(stderr, "Can't re-read temp file!!\n");
            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) {
                  fprintf(stderr, "%s: bad format\n", line1);
                  return (0);
            }
            if ((cp = strtok((char *)0, "\n")) == NULL) {
                  fprintf(stderr, "%s: %s: bad format\n", fsp,
                      &fsp[strlen(fsp) + 1]);
                  return (0);
            }
            cnt = sscanf(cp,
                " block grace period: %d %s file grace period: %d %s",
                &btime, bunits, &itime, iunits);
            if (cnt != 4) {
                  fprintf(stderr, "%s:%s: bad format\n", 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(time)
      time_t time;
{
      static char buf[20];

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

/*
 * Convert ASCII input times to seconds.
 */
int
cvtatos(time, units, seconds)
      time_t time;
      char *units;
      time_t *seconds;
{

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

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

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

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

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

/*
 * Check to see if a particular quota is to be enabled.
 */
#ifdef __APPLE__
int
hasquota(fst, type, qfnamep)
        register struct statfs *fst;
      int type;
      char **qfnamep;
{
        struct stat sb;
      static char initname, usrname[100], grpname[100];
      static char buf[BUFSIZ];

      if (!initname) {
            sprintf(usrname, "%s%s", qfextension[USRQUOTA], qfname);
            sprintf(grpname, "%s%s", qfextension[GRPQUOTA], qfname);
            initname = 1;
      }

        /*
        We only support the default path to the
        on disk quota files.
      */

        (void)sprintf(buf, "%s/%s.%s", fst->f_mntonname,
                  QUOTAOPSNAME, qfextension[type] );
        if (stat(buf, &sb) != 0) {
          /* There appears to be no mount option file */
          return(0);
        }

      (void) sprintf(buf, "%s/%s.%s", fst->f_mntonname, qfname, qfextension[type]);
      *qfnamep = buf;
      return (1);
}
#else
hasquota(fs, type, qfnamep)
      register struct fstab *fs;
      int type;
      char **qfnamep;
{
      register char *opt;
      char *cp, *index(), *strtok();
      static char initname, usrname[100], grpname[100];
      static char buf[BUFSIZ];

      if (!initname) {
            sprintf(usrname, "%s%s", qfextension[USRQUOTA], qfname);
            sprintf(grpname, "%s%s", qfextension[GRPQUOTA], qfname);
            initname = 1;
      }
      strcpy(buf, fs->fs_mntops);
      for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
            if (cp = index(opt, '='))
                  *cp++ = '\0';
            if (type == USRQUOTA && strcmp(opt, usrname) == 0)
                  break;
            if (type == GRPQUOTA && strcmp(opt, grpname) == 0)
                  break;
      }
      if (!opt)
            return (0);
      if (cp) {
            *qfnamep = cp;
            return (1);
      }
      (void) sprintf(buf, "%s/%s.%s", fs->fs_file, qfname, qfextension[type]);
      *qfnamep = buf;
      return (1);
}
#endif /* __APPLE */

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