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