usr.sbin/quotaon/quotaon.c

   1 /*
   2  * Copyright (c) 1980, 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Robert Elz at The University of Melbourne.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#) Copyright (c) 1980, 1990, 1993 The Regents of the University of California.  All rights reserved.
  37  * @(#)quotaon.c        8.1 (Berkeley) 6/6/93
  38  * $FreeBSD: src/usr.sbin/quotaon/quotaon.c,v 1.4.2.1 2001/07/19 05:17:06 kris Exp $
  39  * $DragonFly: src/usr.sbin/quotaon/quotaon.c,v 1.8 2005/03/18 00:52:49 joerg Exp $
  40  */
  41
  42 /*
  43  * Turn quota on/off for a filesystem.
  44  */
  45 #include <sys/param.h>
  46 #include <sys/file.h>
  47 #include <sys/mount.h>
  48 #include <vfs/ufs/quota.h>
  49 #include <err.h>
  50 #include <fstab.h>
  51 #include <stdio.h>
  52 #include <stdlib.h>
  53 #include <string.h>
  54 #include <unistd.h>
  55
  56 const char *qfname = QUOTAFILENAME;
  57 const char *qfextension[] = INITQFNAMES;
  58
  59 int     aflag;          /* all file systems */
  60 int     gflag;          /* operate on group quotas */
  61 int     uflag;          /* operate on user quotas */
  62 int     vflag;          /* verbose */
  63
  64 int hasquota(struct fstab *, int, char **);
  65 int oneof(char *, char *[], int);
  66 int quotaonoff(struct fstab *fs, int, int, char *);
  67 int readonly(struct fstab *);
  68 static void usage(void);
  69
  70 int
  71 main(int argc, char **argv)
  72 {
  73         struct fstab *fs;
  74         char ch, *qfnp, *whoami;
  75         long argnum, done = 0;
  76         int i, offmode = 0, errs = 0;
  77
  78         whoami = strrchr(*argv, '/') + 1;
  79         if (whoami == (char *)1)
  80                 whoami = *argv;
  81         if (strcmp(whoami, "quotaoff") == 0)
  82                 offmode++;
  83         else if (strcmp(whoami, "quotaon") != 0)
  84                 errx(1, "name must be quotaon or quotaoff");
  85         while ((ch = getopt(argc, argv, "avug")) != -1) {
  86                 switch(ch) {
  87                 case 'a':
  88                         aflag++;
  89                         break;
  90                 case 'g':
  91                         gflag++;
  92                         break;
  93                 case 'u':
  94                         uflag++;
  95                         break;
  96                 case 'v':
  97                         vflag++;
  98                         break;
  99                 default:
 100                         usage();
 101                 }
 102         }
 103         argc -= optind;
 104         argv += optind;
 105         if (argc <= 0 && !aflag)
 106                 usage();
 107         if (!gflag && !uflag) {
 108                 gflag++;
 109                 uflag++;
 110         }
 111         setfsent();
 112         while ((fs = getfsent()) != NULL) {
 113                 if (strcmp(fs->fs_vfstype, "ufs") ||
 114                     strcmp(fs->fs_type, FSTAB_RW))
 115                         continue;
 116                 if (aflag) {
 117                         if (gflag && hasquota(fs, GRPQUOTA, &qfnp))
 118                                 errs += quotaonoff(fs, offmode, GRPQUOTA, qfnp);
 119                         if (uflag && hasquota(fs, USRQUOTA, &qfnp))
 120                                 errs += quotaonoff(fs, offmode, USRQUOTA, qfnp);
 121                         continue;
 122                 }
 123                 if ((argnum = oneof(fs->fs_file, argv, argc)) >= 0 ||
 124                     (argnum = oneof(fs->fs_spec, argv, argc)) >= 0) {
 125                         done |= 1 << argnum;
 126                         if (gflag && hasquota(fs, GRPQUOTA, &qfnp))
 127                                 errs += quotaonoff(fs, offmode, GRPQUOTA, qfnp);
 128                         if (uflag && hasquota(fs, USRQUOTA, &qfnp))
 129                                 errs += quotaonoff(fs, offmode, USRQUOTA, qfnp);
 130                 }
 131         }
 132         endfsent();
 133         for (i = 0; i < argc; i++)
 134                 if ((done & (1 << i)) == 0)
 135                         warnx("%s not found in fstab", argv[i]);
 136         exit(errs);
 137 }
 138
 139 static void
 140 usage(void)
 141 {
 142         fprintf(stderr, "%s\n%s\n%s\n%s\n",
 143                 "usage: quotaon [-g] [-u] [-v] -a",
 144                 "       quotaon [-g] [-u] [-v] filesystem ...",
 145                 "       quotaoff [-g] [-u] [-v] -a",
 146                 "       quotaoff [-g] [-u] [-v] filesystem ...");
 147         exit(1);
 148 }
 149
 150 int
 151 quotaonoff(struct fstab *fs, int offmode, int type, char *qfpathname)
 152 {
 153         if (strcmp(fs->fs_file, "/") && readonly(fs))
 154                 return (1);
 155         if (offmode) {
 156                 if (quotactl(fs->fs_file, QCMD(Q_QUOTAOFF, type), 0, 0) < 0) {
 157                         warn("%s", fs->fs_file);
 158                         return (1);
 159                 }
 160                 if (vflag)
 161                         printf("%s: quotas turned off\n", fs->fs_file);
 162                 return (0);
 163         }
 164         if (quotactl(fs->fs_file, QCMD(Q_QUOTAON, type), 0, qfpathname) < 0) {
 165                 warnx("using %s on", qfpathname);
 166                 warn("%s", fs->fs_file);
 167                 return (1);
 168         }
 169         if (vflag)
 170                 printf("%s: %s quotas turned on\n", fs->fs_file,
 171                     qfextension[type]);
 172         return (0);
 173 }
 174
 175 /*
 176  * Check to see if target appears in list of size cnt.
 177  */
 178 int
 179 oneof(char *target, char *list[], int cnt)
 180 {
 181         int i;
 182
 183         for (i = 0; i < cnt; i++)
 184                 if (strcmp(target, list[i]) == 0)
 185                         return (i);
 186         return (-1);
 187 }
 188
 189 /*
 190  * Check to see if a particular quota is to be enabled.
 191  */
 192 int
 193 hasquota(struct fstab *fs, int type, char **qfnamep)
 194 {
 195         char *opt;
 196         char *cp;
 197         static char initname, usrname[100], grpname[100];
 198         static char buf[BUFSIZ];
 199
 200         if (!initname) {
 201                 sprintf(usrname, "%s%s", qfextension[USRQUOTA], qfname);
 202                 sprintf(grpname, "%s%s", qfextension[GRPQUOTA], qfname);
 203                 initname = 1;
 204         }
 205         strcpy(buf, fs->fs_mntops);
 206         for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
 207                 if ((cp = strchr(opt, '=')))
 208                         *cp++ = '\0';
 209                 if (type == USRQUOTA && strcmp(opt, usrname) == 0)
 210                         break;
 211                 if (type == GRPQUOTA && strcmp(opt, grpname) == 0)
 212                         break;
 213         }
 214         if (!opt)
 215                 return (0);
 216         if (cp) {
 217                 *qfnamep = cp;
 218                 return (1);
 219         }
 220         sprintf(buf, "%s/%s.%s", fs->fs_file, qfname, qfextension[type]);
 221         *qfnamep = buf;
 222         return (1);
 223 }
 224
 225 /*
 226  * Verify file system is mounted and not readonly.
 227  */
 228 int
 229 readonly(struct fstab *fs)
 230 {
 231         struct statfs fsbuf;
 232
 233         if (statfs(fs->fs_file, &fsbuf) < 0 ||
 234             strcmp(fsbuf.f_mntonname, fs->fs_file) ||
 235             strcmp(fsbuf.f_mntfromname, fs->fs_spec)) {
 236                 printf("%s: not mounted\n", fs->fs_file);
 237                 return (1);
 238         }
 239         if (fsbuf.f_flags & MNT_RDONLY) {
 240                 printf("%s: mounted read-only\n", fs->fs_file);
 241                 return (1);
 242         }
 243         return (0);
 244 }