sbin/quotacheck/preen.c

   1 /*      $NetBSD: preen.c,v 1.18 1998/07/26 20:02:36 mycroft Exp $       */
   2
   3 /*
   4  * Copyright (c) 1990, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 4. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * $FreeBSD$
  32  */
  33
  34 #include <sys/cdefs.h>
  35 #ifndef lint
  36 #if 0
  37 static char sccsid[] = "@(#)preen.c     8.5 (Berkeley) 4/28/95";
  38 #else
  39 __RCSID("$NetBSD: preen.c,v 1.18 1998/07/26 20:02:36 mycroft Exp $");
  40 #endif
  41 #endif /* not lint */
  42
  43 #include <sys/param.h>
  44 #include <sys/stat.h>
  45 #include <sys/wait.h>
  46 #include <sys/queue.h>
  47
  48 #include <ufs/ufs/quota.h>
  49
  50 #include <err.h>
  51 #include <ctype.h>
  52 #include <fcntl.h>
  53 #include <fstab.h>
  54 #include <libutil.h>
  55 #include <string.h>
  56 #include <stdio.h>
  57 #include <stdlib.h>
  58 #include <unistd.h>
  59
  60 #include "quotacheck.h"
  61
  62 struct partentry {
  63         TAILQ_ENTRY(partentry)   p_entries;
  64         char                    *p_devname;     /* device name */
  65         const char              *p_mntpt;       /* mount point */
  66         struct quotafile        *p_qfu;         /* user quota file info ptr */
  67         struct quotafile        *p_qfg;         /* group quota file info */
  68 };
  69
  70 TAILQ_HEAD(part, partentry) badh;
  71
  72 struct diskentry {
  73         TAILQ_ENTRY(diskentry)      d_entries;
  74         char                       *d_name;     /* disk base name */
  75         TAILQ_HEAD(prt, partentry)  d_part;     /* list of partitions on disk */
  76         int                         d_pid;      /* 0 or pid of fsck proc */
  77 };
  78
  79 TAILQ_HEAD(disk, diskentry) diskh;
  80
  81 static struct diskentry *finddisk(const char *);
  82 static void addpart(struct fstab *, struct quotafile *, struct quotafile *);
  83 static int startdisk(struct diskentry *);
  84 extern void *emalloc(size_t);
  85 extern char *estrdup(const char *);
  86
  87 int
  88 checkfstab(int uflag, int gflag)
  89 {
  90         struct fstab *fs;
  91         struct diskentry *d, *nextdisk;
  92         struct partentry *p;
  93         int ret, pid, retcode, passno, sumstatus, status, nextpass;
  94         struct quotafile *qfu, *qfg;
  95
  96         TAILQ_INIT(&badh);
  97         TAILQ_INIT(&diskh);
  98
  99         sumstatus = 0;
 100
 101         nextpass = 0;
 102         for (passno = 1; nextpass != INT_MAX; passno = nextpass) {
 103                 nextpass = INT_MAX;
 104                 if (setfsent() == 0) {
 105                         warnx("Can't open checklist file: %s\n", _PATH_FSTAB);
 106                         return (8);
 107                 }
 108                 while ((fs = getfsent()) != 0) {
 109                         if (fs->fs_passno > passno && fs->fs_passno < nextpass)
 110                                 nextpass = fs->fs_passno;
 111
 112                         if (passno != fs->fs_passno)
 113                                 continue;
 114
 115                         qfu = NULL;
 116                         if (uflag)
 117                                 qfu = quota_open(fs, USRQUOTA, O_CREAT|O_RDWR);
 118                         qfg = NULL;
 119                         if (gflag)
 120                                 qfg = quota_open(fs, GRPQUOTA, O_CREAT|O_RDWR);
 121                         if (qfu == NULL && qfg == NULL)
 122                                 continue;
 123
 124                         if (passno == 1) {
 125                                 sumstatus = chkquota(fs->fs_spec, qfu, qfg);
 126                                 if (qfu)
 127                                         quota_close(qfu);
 128                                 if (qfg)
 129                                         quota_close(qfg);
 130                                 if (sumstatus)
 131                                         return (sumstatus);
 132                                 continue;
 133                         }
 134                         addpart(fs, qfu, qfg);
 135                 }
 136
 137                 if (passno == 1)
 138                         continue;
 139
 140                 TAILQ_FOREACH(nextdisk, &diskh, d_entries) {
 141                         if ((ret = startdisk(nextdisk)) != 0)
 142                                 return ret;
 143                 }
 144
 145                 while ((pid = wait(&status)) != -1) {
 146                         TAILQ_FOREACH(d, &diskh, d_entries)
 147                                 if (d->d_pid == pid)
 148                                         break;
 149
 150                         if (d == NULL) {
 151                                 warnx("Unknown pid %d\n", pid);
 152                                 continue;
 153                         }
 154
 155                         if (WIFEXITED(status))
 156                                 retcode = WEXITSTATUS(status);
 157                         else
 158                                 retcode = 0;
 159
 160                         p = TAILQ_FIRST(&d->d_part);
 161
 162                         if (WIFSIGNALED(status)) {
 163                                 (void) fprintf(stderr,
 164                                     "%s: (%s): EXITED WITH SIGNAL %d\n",
 165                                     p->p_devname, p->p_mntpt,
 166                                     WTERMSIG(status));
 167                                 retcode = 8;
 168                         }
 169
 170                         TAILQ_REMOVE(&d->d_part, p, p_entries);
 171
 172                         if (retcode != 0) {
 173                                 TAILQ_INSERT_TAIL(&badh, p, p_entries);
 174                                 sumstatus |= retcode;
 175                         } else {
 176                                 free(p->p_devname);
 177                                 if (p->p_qfu)
 178                                         quota_close(p->p_qfu);
 179                                 if (p->p_qfg)
 180                                         quota_close(p->p_qfg);
 181                                 free(p);
 182                         }
 183                         d->d_pid = 0;
 184
 185                         if (TAILQ_EMPTY(&d->d_part)) {
 186                                 TAILQ_REMOVE(&diskh, d, d_entries);
 187                         } else {
 188                                 if ((ret = startdisk(d)) != 0)
 189                                         return ret;
 190                         }
 191                 }
 192         }
 193
 194         if (sumstatus) {
 195                 p = TAILQ_FIRST(&badh);
 196                 if (p == NULL)
 197                         return (sumstatus);
 198
 199                 (void) fprintf(stderr,
 200                         "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t",
 201                         TAILQ_NEXT(p, p_entries) ? "S" : "",
 202                         "UNEXPECTED INCONSISTENCY:");
 203
 204                 for (; p; p = TAILQ_NEXT(p, p_entries))
 205                         (void) fprintf(stderr,
 206                             "%s: (%s)%s", p->p_devname, p->p_mntpt,
 207                             TAILQ_NEXT(p, p_entries) ? ", " : "\n");
 208
 209                 return sumstatus;
 210         }
 211         (void) endfsent();
 212         return (0);
 213 }
 214
 215
 216 static struct diskentry *
 217 finddisk(const char *name)
 218 {
 219         const char *p;
 220         size_t len = 0;
 221         struct diskentry *d;
 222
 223         p = strrchr(name, '/');
 224         if (p == NULL)
 225                 p = name;
 226         else
 227                 p++;
 228         for (; *p && !isdigit(*p); p++)
 229                 continue;
 230         for (; *p && isdigit(*p); p++)
 231                 continue;
 232         len = p - name;
 233         if (len == 0)
 234                 len = strlen(name);
 235
 236         TAILQ_FOREACH(d, &diskh, d_entries)
 237                 if (strncmp(d->d_name, name, len) == 0 && d->d_name[len] == 0)
 238                         return d;
 239
 240         d = emalloc(sizeof(*d));
 241         d->d_name = estrdup(name);
 242         d->d_name[len] = '\0';
 243         TAILQ_INIT(&d->d_part);
 244         d->d_pid = 0;
 245
 246         TAILQ_INSERT_TAIL(&diskh, d, d_entries);
 247
 248         return d;
 249 }
 250
 251 static void
 252 addpart(struct fstab *fs, struct quotafile *qfu, struct quotafile *qfg)
 253 {
 254         struct diskentry *d = finddisk(fs->fs_spec);
 255         struct partentry *p;
 256
 257         TAILQ_FOREACH(p, &d->d_part, p_entries)
 258                 if (strcmp(p->p_devname, fs->fs_spec) == 0) {
 259                         warnx("%s in fstab more than once!\n", fs->fs_spec);
 260                         return;
 261                 }
 262
 263         p = emalloc(sizeof(*p));
 264         p->p_devname = estrdup(blockcheck(fs->fs_spec));
 265         if (qfu != NULL)
 266                 p->p_mntpt = quota_fsname(qfu);
 267         else
 268                 p->p_mntpt = quota_fsname(qfg);
 269         p->p_qfu = qfu;
 270         p->p_qfg = qfg;
 271
 272         TAILQ_INSERT_TAIL(&d->d_part, p, p_entries);
 273 }
 274
 275
 276 static int
 277 startdisk(struct diskentry *d)
 278 {
 279         struct partentry *p = TAILQ_FIRST(&d->d_part);
 280
 281         d->d_pid = fork();
 282         if (d->d_pid < 0) {
 283                 perror("fork");
 284                 return (8);
 285         }
 286         if (d->d_pid == 0)
 287                 exit(chkquota(p->p_devname, p->p_qfu, p->p_qfg));
 288         return (0);
 289 }