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5211717f | 1 | /* |
21e5ab9a KB |
2 | * Copyright (c) 1990, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
5211717f | 4 | * |
70ab3c27 | 5 | * %sccs.include.redist.c% |
5211717f KM |
6 | */ |
7 | ||
8 | #ifndef lint | |
68b09ac6 | 9 | static char sccsid[] = "@(#)preen.c 8.3 (Berkeley) %G%"; |
5211717f KM |
10 | #endif /* not lint */ |
11 | ||
12 | #include <sys/param.h> | |
13 | #include <sys/stat.h> | |
14 | #include <sys/wait.h> | |
15 | #include <fstab.h> | |
38dde0cd | 16 | #include <string.h> |
5211717f | 17 | #include <stdio.h> |
d72e970b | 18 | #include <stdlib.h> |
5211717f KM |
19 | #include <ctype.h> |
20 | ||
d72e970b | 21 | char *rawname(), *unrawname(), *blockcheck(); |
5211717f KM |
22 | |
23 | struct part { | |
24 | struct part *next; /* forward link of partitions on disk */ | |
25 | char *name; /* device name */ | |
26 | char *fsname; /* mounted filesystem name */ | |
27 | long auxdata; /* auxillary data for application */ | |
28 | } *badlist, **badnext = &badlist; | |
29 | ||
30 | struct disk { | |
31 | char *name; /* disk base name */ | |
32 | struct disk *next; /* forward link for list of disks */ | |
33 | struct part *part; /* head of list of partitions on disk */ | |
34 | int pid; /* If != 0, pid of proc working on */ | |
35 | } *disks; | |
36 | ||
5f229d0b KM |
37 | int nrun, ndisks; |
38 | char hotroot; | |
5211717f KM |
39 | |
40 | checkfstab(preen, maxrun, docheck, chkit) | |
41 | int preen, maxrun; | |
42 | int (*docheck)(), (*chkit)(); | |
43 | { | |
44 | register struct fstab *fsp; | |
45 | register struct disk *dk, *nextdisk; | |
46 | register struct part *pt; | |
47 | int ret, pid, retcode, passno, sumstatus, status; | |
48 | long auxdata; | |
49 | char *name; | |
50 | ||
51 | sumstatus = 0; | |
52 | for (passno = 1; passno <= 2; passno++) { | |
53 | if (setfsent() == 0) { | |
54 | fprintf(stderr, "Can't open checklist file: %s\n", | |
55 | _PATH_FSTAB); | |
56 | return (8); | |
57 | } | |
58 | while ((fsp = getfsent()) != 0) { | |
59 | if ((auxdata = (*docheck)(fsp)) == 0) | |
60 | continue; | |
61 | if (preen == 0 || passno == 1 && fsp->fs_passno == 1) { | |
62 | if (name = blockcheck(fsp->fs_spec)) { | |
63 | if (sumstatus = (*chkit)(name, | |
d08e3849 | 64 | fsp->fs_file, auxdata, 0)) |
5211717f KM |
65 | return (sumstatus); |
66 | } else if (preen) | |
67 | return (8); | |
68 | } else if (passno == 2 && fsp->fs_passno > 1) { | |
69 | if ((name = blockcheck(fsp->fs_spec)) == NULL) { | |
70 | fprintf(stderr, "BAD DISK NAME %s\n", | |
71 | fsp->fs_spec); | |
72 | sumstatus |= 8; | |
73 | continue; | |
74 | } | |
75 | addpart(name, fsp->fs_file, auxdata); | |
76 | } | |
77 | } | |
78 | if (preen == 0) | |
79 | return (0); | |
80 | } | |
81 | if (preen) { | |
82 | if (maxrun == 0) | |
83 | maxrun = ndisks; | |
84 | if (maxrun > ndisks) | |
85 | maxrun = ndisks; | |
86 | nextdisk = disks; | |
87 | for (passno = 0; passno < maxrun; ++passno) { | |
88 | while (ret = startdisk(nextdisk, chkit) && nrun > 0) | |
89 | sleep(10); | |
90 | if (ret) | |
91 | return (ret); | |
92 | nextdisk = nextdisk->next; | |
93 | } | |
94 | while ((pid = wait(&status)) != -1) { | |
95 | for (dk = disks; dk; dk = dk->next) | |
96 | if (dk->pid == pid) | |
97 | break; | |
98 | if (dk == 0) { | |
99 | printf("Unknown pid %d\n", pid); | |
100 | continue; | |
101 | } | |
102 | if (WIFEXITED(status)) | |
103 | retcode = WEXITSTATUS(status); | |
104 | else | |
105 | retcode = 0; | |
106 | if (WIFSIGNALED(status)) { | |
107 | printf("%s (%s): EXITED WITH SIGNAL %d\n", | |
108 | dk->part->name, dk->part->fsname, | |
109 | WTERMSIG(status)); | |
110 | retcode = 8; | |
111 | } | |
112 | if (retcode != 0) { | |
113 | sumstatus |= retcode; | |
114 | *badnext = dk->part; | |
115 | badnext = &dk->part->next; | |
116 | dk->part = dk->part->next; | |
117 | *badnext = NULL; | |
118 | } else | |
119 | dk->part = dk->part->next; | |
120 | dk->pid = 0; | |
121 | nrun--; | |
122 | if (dk->part == NULL) | |
123 | ndisks--; | |
124 | ||
125 | if (nextdisk == NULL) { | |
126 | if (dk->part) { | |
127 | while (ret = startdisk(dk, chkit) && | |
128 | nrun > 0) | |
129 | sleep(10); | |
130 | if (ret) | |
131 | return (ret); | |
132 | } | |
133 | } else if (nrun < maxrun && nrun < ndisks) { | |
134 | for ( ;; ) { | |
135 | if ((nextdisk = nextdisk->next) == NULL) | |
136 | nextdisk = disks; | |
137 | if (nextdisk->part != NULL && | |
138 | nextdisk->pid == 0) | |
139 | break; | |
140 | } | |
141 | while (ret = startdisk(nextdisk, chkit) && | |
142 | nrun > 0) | |
143 | sleep(10); | |
144 | if (ret) | |
145 | return (ret); | |
146 | } | |
147 | } | |
148 | } | |
149 | if (sumstatus) { | |
150 | if (badlist == 0) | |
151 | return (sumstatus); | |
152 | fprintf(stderr, "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t", | |
153 | badlist->next ? "S" : "", "UNEXPECTED INCONSISTENCY:"); | |
154 | for (pt = badlist; pt; pt = pt->next) | |
155 | fprintf(stderr, "%s (%s)%s", pt->name, pt->fsname, | |
156 | pt->next ? ", " : "\n"); | |
157 | return (sumstatus); | |
158 | } | |
159 | (void)endfsent(); | |
160 | return (0); | |
161 | } | |
162 | ||
163 | struct disk * | |
164 | finddisk(name) | |
165 | char *name; | |
166 | { | |
167 | register struct disk *dk, **dkp; | |
168 | register char *p; | |
d72e970b | 169 | size_t len; |
5211717f KM |
170 | |
171 | for (p = name + strlen(name) - 1; p >= name; --p) | |
172 | if (isdigit(*p)) { | |
173 | len = p - name + 1; | |
174 | break; | |
175 | } | |
176 | if (p < name) | |
177 | len = strlen(name); | |
178 | ||
179 | for (dk = disks, dkp = &disks; dk; dkp = &dk->next, dk = dk->next) { | |
180 | if (strncmp(dk->name, name, len) == 0 && | |
181 | dk->name[len] == 0) | |
182 | return (dk); | |
183 | } | |
184 | if ((*dkp = (struct disk *)malloc(sizeof(struct disk))) == NULL) { | |
185 | fprintf(stderr, "out of memory"); | |
186 | exit (8); | |
187 | } | |
188 | dk = *dkp; | |
d72e970b | 189 | if ((dk->name = malloc(len + 1)) == NULL) { |
5211717f KM |
190 | fprintf(stderr, "out of memory"); |
191 | exit (8); | |
192 | } | |
d72e970b | 193 | (void)strncpy(dk->name, name, len); |
5211717f KM |
194 | dk->name[len] = '\0'; |
195 | dk->part = NULL; | |
196 | dk->next = NULL; | |
197 | dk->pid = 0; | |
198 | ndisks++; | |
199 | return (dk); | |
200 | } | |
201 | ||
202 | addpart(name, fsname, auxdata) | |
203 | char *name, *fsname; | |
204 | long auxdata; | |
205 | { | |
206 | struct disk *dk = finddisk(name); | |
207 | register struct part *pt, **ppt = &dk->part; | |
208 | ||
209 | for (pt = dk->part; pt; ppt = &pt->next, pt = pt->next) | |
210 | if (strcmp(pt->name, name) == 0) { | |
211 | printf("%s in fstab more than once!\n", name); | |
212 | return; | |
213 | } | |
214 | if ((*ppt = (struct part *)malloc(sizeof(struct part))) == NULL) { | |
215 | fprintf(stderr, "out of memory"); | |
216 | exit (8); | |
217 | } | |
218 | pt = *ppt; | |
d72e970b | 219 | if ((pt->name = malloc(strlen(name) + 1)) == NULL) { |
5211717f KM |
220 | fprintf(stderr, "out of memory"); |
221 | exit (8); | |
222 | } | |
d72e970b KM |
223 | (void)strcpy(pt->name, name); |
224 | if ((pt->fsname = malloc(strlen(fsname) + 1)) == NULL) { | |
5211717f KM |
225 | fprintf(stderr, "out of memory"); |
226 | exit (8); | |
227 | } | |
d72e970b | 228 | (void)strcpy(pt->fsname, fsname); |
5211717f KM |
229 | pt->next = NULL; |
230 | pt->auxdata = auxdata; | |
231 | } | |
232 | ||
233 | startdisk(dk, checkit) | |
234 | register struct disk *dk; | |
235 | int (*checkit)(); | |
236 | { | |
237 | register struct part *pt = dk->part; | |
238 | ||
239 | dk->pid = fork(); | |
240 | if (dk->pid < 0) { | |
241 | perror("fork"); | |
242 | return (8); | |
243 | } | |
244 | if (dk->pid == 0) | |
d08e3849 | 245 | exit((*checkit)(pt->name, pt->fsname, pt->auxdata, 1)); |
5211717f KM |
246 | nrun++; |
247 | return (0); | |
248 | } | |
249 | ||
250 | char * | |
68b09ac6 KM |
251 | blockcheck(origname) |
252 | char *origname; | |
5211717f KM |
253 | { |
254 | struct stat stslash, stblock, stchar; | |
68b09ac6 | 255 | char *newname, *raw; |
5211717f KM |
256 | int retried = 0; |
257 | ||
258 | hotroot = 0; | |
259 | if (stat("/", &stslash) < 0) { | |
260 | perror("/"); | |
261 | printf("Can't stat root\n"); | |
68b09ac6 | 262 | return (origname); |
5211717f | 263 | } |
68b09ac6 | 264 | newname = origname; |
5211717f | 265 | retry: |
68b09ac6 KM |
266 | if (stat(newname, &stblock) < 0) { |
267 | perror(newname); | |
268 | printf("Can't stat %s\n", newname); | |
269 | return (origname); | |
5211717f KM |
270 | } |
271 | if ((stblock.st_mode & S_IFMT) == S_IFBLK) { | |
272 | if (stslash.st_dev == stblock.st_rdev) | |
273 | hotroot++; | |
68b09ac6 | 274 | raw = rawname(newname); |
5211717f KM |
275 | if (stat(raw, &stchar) < 0) { |
276 | perror(raw); | |
277 | printf("Can't stat %s\n", raw); | |
68b09ac6 | 278 | return (origname); |
5211717f KM |
279 | } |
280 | if ((stchar.st_mode & S_IFMT) == S_IFCHR) { | |
281 | return (raw); | |
282 | } else { | |
283 | printf("%s is not a character device\n", raw); | |
68b09ac6 | 284 | return (origname); |
5211717f KM |
285 | } |
286 | } else if ((stblock.st_mode & S_IFMT) == S_IFCHR && !retried) { | |
68b09ac6 | 287 | newname = unrawname(newname); |
5211717f KM |
288 | retried++; |
289 | goto retry; | |
290 | } | |
48f6b0df KM |
291 | /* |
292 | * Not a block or character device, just return name and | |
293 | * let the user decide whether to use it. | |
294 | */ | |
68b09ac6 | 295 | return (origname); |
5211717f KM |
296 | } |
297 | ||
298 | char * | |
299 | unrawname(name) | |
300 | char *name; | |
301 | { | |
302 | char *dp; | |
303 | struct stat stb; | |
304 | ||
305 | if ((dp = rindex(name, '/')) == 0) | |
306 | return (name); | |
307 | if (stat(name, &stb) < 0) | |
308 | return (name); | |
309 | if ((stb.st_mode & S_IFMT) != S_IFCHR) | |
310 | return (name); | |
a2186afe | 311 | if (dp[1] != 'r') |
5211717f | 312 | return (name); |
a2186afe | 313 | (void)strcpy(&dp[1], &dp[2]); |
5211717f KM |
314 | return (name); |
315 | } | |
316 | ||
317 | char * | |
318 | rawname(name) | |
319 | char *name; | |
320 | { | |
321 | static char rawbuf[32]; | |
322 | char *dp; | |
323 | ||
324 | if ((dp = rindex(name, '/')) == 0) | |
325 | return (0); | |
326 | *dp = 0; | |
327 | (void)strcpy(rawbuf, name); | |
328 | *dp = '/'; | |
329 | (void)strcat(rawbuf, "/r"); | |
a2186afe | 330 | (void)strcat(rawbuf, &dp[1]); |
5211717f KM |
331 | return (rawbuf); |
332 | } |