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