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2a18434a KM |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
7a7c7584 KB |
3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that this notice is preserved and that due credit is given | |
7 | * to the University of California at Berkeley. The name of the University | |
8 | * may not be used to endorse or promote products derived from this | |
9 | * software without specific prior written permission. This software | |
10 | * is provided ``as is'' without express or implied warranty. | |
2a18434a KM |
11 | */ |
12 | ||
13 | #ifndef lint | |
14 | char copyright[] = | |
15 | "@(#) Copyright (c) 1980 Regents of the University of California.\n\ | |
16 | All rights reserved.\n"; | |
7a7c7584 | 17 | #endif /* not lint */ |
2a18434a | 18 | |
311ea057 | 19 | #ifndef lint |
7a7c7584 KB |
20 | static char sccsid[] = "@(#)edquota.c 5.5 (Berkeley) %G%"; |
21 | #endif /* not lint */ | |
311ea057 KM |
22 | |
23 | /* | |
24 | * Disk quota editor. | |
25 | */ | |
26 | #include <stdio.h> | |
27 | #include <signal.h> | |
28 | #include <errno.h> | |
29 | #include <pwd.h> | |
30 | #include <ctype.h> | |
31 | #include <fstab.h> | |
32 | ||
33 | #include <sys/param.h> | |
311ea057 KM |
34 | #include <sys/stat.h> |
35 | #include <sys/file.h> | |
61184f42 | 36 | #include <sys/quota.h> |
311ea057 | 37 | |
311ea057 | 38 | #define DEFEDITOR "/usr/ucb/vi" |
311ea057 KM |
39 | |
40 | struct dquot dq[NMOUNT]; | |
41 | struct dquot odq[NMOUNT]; | |
42 | char dqf[NMOUNT][MAXPATHLEN + 1]; | |
43 | char odqf[NMOUNT][MAXPATHLEN + 1]; | |
44 | ||
45 | char tmpfil[] = "/tmp/EdP.aXXXXX"; | |
1cfb1c19 | 46 | char *qfname = "quotas"; |
311ea057 KM |
47 | char *getenv(); |
48 | ||
49 | main(argc, argv) | |
50 | char **argv; | |
51 | { | |
61184f42 KM |
52 | int uid; |
53 | char *arg0; | |
311ea057 KM |
54 | |
55 | mktemp(tmpfil); | |
56 | close(creat(tmpfil, 0600)); | |
57 | chown(tmpfil, getuid(), getgid()); | |
58 | arg0 = *argv++; | |
59 | if (argc < 2) { | |
61184f42 | 60 | fprintf(stderr, "Usage: %s [-p username] username ...\n", arg0); |
311ea057 KM |
61 | unlink(tmpfil); |
62 | exit(1); | |
63 | } | |
64 | --argc; | |
65 | if (getuid()) { | |
66 | fprintf(stderr, "%s: permission denied\n", arg0); | |
67 | unlink(tmpfil); | |
68 | exit(1); | |
69 | } | |
61184f42 KM |
70 | if (argc > 2 && strcmp(*argv, "-p") == 0) { |
71 | argc--, argv++; | |
72 | uid = getentry(*argv++); | |
73 | if (uid < 0) { | |
74 | unlink(tmpfil); | |
75 | exit(1); | |
76 | } | |
77 | getprivs(uid); | |
78 | argc--; | |
79 | while (argc-- > 0) { | |
80 | uid = getentry(*argv++); | |
81 | if (uid < 0) | |
82 | continue; | |
83 | getdiscq(uid, odq, odqf); | |
84 | putprivs(uid); | |
85 | } | |
86 | unlink(tmpfil); | |
87 | exit(0); | |
88 | } | |
89 | while (--argc >= 0) { | |
90 | uid = getentry(*argv++); | |
91 | if (uid < 0) | |
92 | continue; | |
93 | getprivs(uid); | |
94 | if (editit()) | |
95 | putprivs(uid); | |
96 | } | |
311ea057 KM |
97 | unlink(tmpfil); |
98 | exit(0); | |
99 | } | |
100 | ||
61184f42 KM |
101 | getentry(name) |
102 | char *name; | |
311ea057 | 103 | { |
61184f42 KM |
104 | struct passwd *pw; |
105 | int uid; | |
311ea057 KM |
106 | |
107 | if (alldigits(name)) | |
108 | uid = atoi(name); | |
109 | else if (pw = getpwnam(name)) | |
110 | uid = pw->pw_uid; | |
111 | else { | |
61184f42 | 112 | fprintf(stderr, "%s: no such user\n", name); |
311ea057 | 113 | sleep(1); |
61184f42 | 114 | return (-1); |
311ea057 | 115 | } |
61184f42 | 116 | return (uid); |
311ea057 KM |
117 | } |
118 | ||
119 | editit() | |
120 | { | |
a08c12bc KB |
121 | register int pid, xpid; |
122 | long omask; | |
123 | int stat; | |
311ea057 | 124 | |
a08c12bc | 125 | omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); |
311ea057 KM |
126 | top: |
127 | if ((pid = fork()) < 0) { | |
128 | extern errno; | |
129 | ||
130 | if (errno == EPROCLIM) { | |
131 | fprintf(stderr, "You have too many processes\n"); | |
132 | return(0); | |
133 | } | |
134 | if (errno == EAGAIN) { | |
135 | sleep(1); | |
136 | goto top; | |
137 | } | |
138 | perror("fork"); | |
139 | return (0); | |
140 | } | |
141 | if (pid == 0) { | |
142 | register char *ed; | |
143 | ||
8daa86a6 | 144 | sigsetmask(omask); |
311ea057 KM |
145 | setgid(getgid()); |
146 | setuid(getuid()); | |
311ea057 KM |
147 | if ((ed = getenv("EDITOR")) == (char *)0) |
148 | ed = DEFEDITOR; | |
149 | execlp(ed, ed, tmpfil, 0); | |
150 | perror(ed); | |
151 | exit(1); | |
152 | } | |
153 | while ((xpid = wait(&stat)) >= 0) | |
154 | if (xpid == pid) | |
155 | break; | |
8daa86a6 | 156 | sigsetmask(omask); |
311ea057 KM |
157 | return (!stat); |
158 | } | |
159 | ||
160 | getprivs(uid) | |
161 | register uid; | |
162 | { | |
163 | register i; | |
164 | FILE *fd; | |
165 | ||
166 | getdiscq(uid, dq, dqf); | |
167 | for (i = 0; i < NMOUNT; i++) { | |
168 | odq[i] = dq[i]; | |
169 | strcpy(odqf[i], dqf[i]); | |
170 | } | |
171 | if ((fd = fopen(tmpfil, "w")) == NULL) { | |
172 | fprintf(stderr, "edquota: "); | |
173 | perror(tmpfil); | |
174 | exit(1); | |
175 | } | |
176 | for (i = 0; i < NMOUNT; i++) { | |
177 | if (*dqf[i] == '\0') | |
178 | continue; | |
179 | fprintf(fd, | |
180 | "fs %s blocks (soft = %d, hard = %d) inodes (soft = %d, hard = %d)\n" | |
181 | , dqf[i] | |
285a6d40 JB |
182 | , dbtob(dq[i].dq_bsoftlimit) / 1024 |
183 | , dbtob(dq[i].dq_bhardlimit) / 1024 | |
311ea057 KM |
184 | , dq[i].dq_isoftlimit |
185 | , dq[i].dq_ihardlimit | |
186 | ); | |
187 | } | |
188 | fclose(fd); | |
189 | } | |
190 | ||
191 | putprivs(uid) | |
192 | register uid; | |
193 | { | |
194 | register i, j; | |
195 | int n; | |
196 | FILE *fd; | |
197 | char line[BUFSIZ]; | |
198 | ||
199 | fd = fopen(tmpfil, "r"); | |
200 | if (fd == NULL) { | |
201 | fprintf(stderr, "Can't re-read temp file!!\n"); | |
202 | return; | |
203 | } | |
204 | for (i = 0; i < NMOUNT; i++) { | |
205 | char *cp, *dp, *next(); | |
206 | ||
207 | if (fgets(line, sizeof (line), fd) == NULL) | |
208 | break; | |
209 | cp = next(line, " \t"); | |
210 | if (cp == NULL) | |
211 | break; | |
212 | *cp++ = '\0'; | |
213 | while (*cp && *cp == '\t' && *cp == ' ') | |
214 | cp++; | |
215 | dp = cp, cp = next(cp, " \t"); | |
216 | if (cp == NULL) | |
217 | break; | |
218 | *cp++ = '\0'; | |
219 | while (*cp && *cp == '\t' && *cp == ' ') | |
220 | cp++; | |
221 | strcpy(dqf[i], dp); | |
222 | n = sscanf(cp, | |
223 | "blocks (soft = %d, hard = %d) inodes (soft = %hd, hard = %hd)\n" | |
224 | , &dq[i].dq_bsoftlimit | |
225 | , &dq[i].dq_bhardlimit | |
226 | , &dq[i].dq_isoftlimit | |
227 | , &dq[i].dq_ihardlimit | |
228 | ); | |
1cfb1c19 KM |
229 | if (n != 4) { |
230 | fprintf(stderr, "%s: bad format\n", cp); | |
231 | continue; | |
232 | } | |
285a6d40 JB |
233 | dq[i].dq_bsoftlimit = btodb(dq[i].dq_bsoftlimit * 1024); |
234 | dq[i].dq_bhardlimit = btodb(dq[i].dq_bhardlimit * 1024); | |
311ea057 KM |
235 | } |
236 | fclose(fd); | |
237 | n = i; | |
238 | for (i = 0; i < n; i++) { | |
239 | if (*dqf[i] == '\0') | |
240 | break; | |
241 | for (j = 0; j < NMOUNT; j++) { | |
242 | if (strcmp(dqf[i], odqf[j]) == 0) | |
243 | break; | |
244 | } | |
245 | if (j >= NMOUNT) | |
246 | continue; | |
247 | *odqf[j] = '\0'; | |
311ea057 KM |
248 | /* |
249 | * This isn't really good enough, it is quite likely | |
250 | * to have changed while we have been away editing, | |
251 | * but it's not important enough to worry about at | |
252 | * the minute. | |
253 | */ | |
254 | dq[i].dq_curblocks = odq[j].dq_curblocks; | |
255 | dq[i].dq_curinodes = odq[j].dq_curinodes; | |
256 | /* | |
257 | * If we've upped the inode or disk block limits | |
258 | * and the guy is out of warnings, reinitialize. | |
259 | */ | |
260 | if (dq[i].dq_bsoftlimit > odq[j].dq_bsoftlimit && | |
261 | dq[i].dq_bwarn == 0) | |
262 | dq[i].dq_bwarn = MAX_DQ_WARN; | |
263 | if (dq[i].dq_isoftlimit > odq[j].dq_isoftlimit && | |
264 | dq[i].dq_iwarn == 0) | |
265 | dq[i].dq_iwarn = MAX_IQ_WARN; | |
266 | } | |
267 | if (i < NMOUNT) { | |
268 | for (j = 0; j < NMOUNT; j++) { | |
269 | if (*odqf[j] == '\0') | |
270 | continue; | |
271 | strcpy(dqf[i], odqf[j]); | |
272 | dq[i].dq_isoftlimit = 0; | |
273 | dq[i].dq_ihardlimit = 0; | |
274 | dq[i].dq_bsoftlimit = 0; | |
275 | dq[i].dq_bhardlimit = 0; | |
276 | /* | |
277 | * Same applies as just above | |
278 | * but matters not at all, as we are just | |
279 | * turning quota'ing off for this filesys. | |
280 | */ | |
281 | dq[i].dq_curblocks = odq[j].dq_curblocks; | |
282 | dq[i].dq_curinodes = odq[j].dq_curinodes; | |
283 | if (++i >= NMOUNT) | |
284 | break; | |
285 | } | |
286 | } | |
287 | if (*dqf[0]) | |
288 | putdiscq(uid, dq, dqf); | |
289 | } | |
290 | ||
291 | char * | |
292 | next(cp, match) | |
293 | register char *cp; | |
294 | char *match; | |
295 | { | |
296 | register char *dp; | |
297 | ||
298 | while (cp && *cp) { | |
299 | for (dp = match; dp && *dp; dp++) | |
300 | if (*dp == *cp) | |
301 | return (cp); | |
302 | cp++; | |
303 | } | |
304 | return ((char *)0); | |
305 | } | |
306 | ||
307 | alldigits(s) | |
308 | register char *s; | |
309 | { | |
310 | register c; | |
311 | ||
312 | c = *s++; | |
313 | do { | |
314 | if (!isdigit(c)) | |
315 | return (0); | |
316 | } while (c = *s++); | |
317 | return (1); | |
318 | } | |
319 | ||
320 | getdiscq(uid, dq, dqf) | |
321 | register uid; | |
322 | register struct dquot *dq; | |
323 | register char (*dqf)[MAXPATHLEN + 1]; | |
324 | { | |
325 | register struct fstab *fs; | |
1cfb1c19 | 326 | char qfilename[MAXPATHLEN + 1]; |
1b102e0f KM |
327 | struct stat statb; |
328 | struct dqblk dqblk; | |
329 | dev_t fsdev; | |
330 | int fd; | |
331 | static int warned = 0; | |
332 | extern int errno; | |
311ea057 KM |
333 | |
334 | setfsent(); | |
335 | while (fs = getfsent()) { | |
311ea057 KM |
336 | if (stat(fs->fs_spec, &statb) < 0) |
337 | continue; | |
338 | fsdev = statb.st_rdev; | |
1cfb1c19 KM |
339 | sprintf(qfilename, "%s/%s", fs->fs_file, qfname); |
340 | if (stat(qfilename, &statb) < 0 || statb.st_dev != fsdev) | |
311ea057 KM |
341 | continue; |
342 | if (quota(Q_GETDLIM, uid, fsdev, &dqblk) != 0) { | |
1b102e0f KM |
343 | if (errno == EINVAL && !warned) { |
344 | warned++; | |
345 | fprintf(stderr, "Warning: %s\n", | |
346 | "Quotas are not compiled into this kernel"); | |
347 | sleep(3); | |
348 | } | |
349 | fd = open(qfilename, O_RDONLY); | |
311ea057 KM |
350 | if (fd < 0) |
351 | continue; | |
6f999543 | 352 | lseek(fd, (long)(uid * sizeof dqblk), L_SET); |
a1d76d07 S |
353 | switch (read(fd, &dqblk, sizeof dqblk)) { |
354 | case 0: /* EOF */ | |
355 | /* | |
356 | * Convert implicit 0 quota (EOF) | |
357 | * into an explicit one (zero'ed dqblk) | |
358 | */ | |
359 | bzero((caddr_t)&dqblk, sizeof dqblk); | |
360 | break; | |
361 | ||
362 | case sizeof dqblk: /* OK */ | |
363 | break; | |
364 | ||
365 | default: /* ERROR */ | |
366 | fprintf(stderr, "edquota: read error in "); | |
367 | perror(qfilename); | |
311ea057 KM |
368 | close(fd); |
369 | continue; | |
370 | } | |
371 | close(fd); | |
311ea057 KM |
372 | } |
373 | dq->dq_dqb = dqblk; | |
374 | dq->dq_dev = fsdev; | |
375 | strcpy(*dqf, fs->fs_file); | |
376 | dq++, dqf++; | |
377 | } | |
378 | endfsent(); | |
379 | **dqf = '\0'; | |
380 | } | |
381 | ||
382 | putdiscq(uid, dq, dqf) | |
383 | register uid; | |
384 | register struct dquot *dq; | |
385 | register char (*dqf)[MAXPATHLEN + 1]; | |
386 | { | |
387 | register fd, cnt; | |
388 | struct stat sb; | |
389 | struct fstab *fs; | |
390 | ||
391 | cnt = 0; | |
392 | for (cnt = 0; ++cnt <= NMOUNT && **dqf; dq++, dqf++) { | |
393 | fs = getfsfile(*dqf); | |
1cfb1c19 KM |
394 | if (fs == NULL) { |
395 | fprintf(stderr, "%s: not in /etc/fstab\n", *dqf); | |
396 | continue; | |
397 | } | |
398 | strcat(*dqf, "/"); | |
399 | strcat(*dqf, qfname); | |
400 | if (stat(*dqf, &sb) >= 0) | |
401 | quota(Q_SETDLIM, uid, sb.st_dev, &dq->dq_dqb); | |
402 | if ((fd = open(*dqf, 1)) < 0) { | |
403 | perror(*dqf); | |
404 | } else { | |
311ea057 KM |
405 | lseek(fd, (long)uid * (long)sizeof (struct dqblk), 0); |
406 | if (write(fd, &dq->dq_dqb, sizeof (struct dqblk)) != | |
407 | sizeof (struct dqblk)) { | |
408 | fprintf(stderr, "edquota: "); | |
409 | perror(*dqf); | |
410 | } | |
411 | close(fd); | |
412 | } | |
311ea057 KM |
413 | } |
414 | } |