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1/*-
2 * Copyright (c) 2002 Dima Dorfman.
3 * 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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27/*
28 * Rule subsystem manipulation.
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: head/sbin/devfs/rule.c 100805 2002-07-28 06:59:40Z dd $");
32__FBSDID("$FreeBSD: head/sbin/devfs/rule.c 124830 2004-01-22 07:23:36Z grehan $");
33
34#include <sys/param.h>
35#include <sys/conf.h>
36#include <sys/ioctl.h>
37
38#include <assert.h>
39#include <err.h>
40#include <errno.h>
41#include <grp.h>
42#include <pwd.h>
43#include <stdio.h>
44#include <stdlib.h>
45#include <string.h>
46#include <unistd.h>
47
48#include "extern.h"
49
50static void rulespec_infp(FILE *fp, unsigned long reqest, devfs_rsnum rsnum);
51static void rulespec_instr(struct devfs_rule *dr, const char *str,
52 devfs_rsnum rsnum);
53static void rulespec_intok(struct devfs_rule *dr, int ac, char **av,
54 devfs_rsnum rsnum);
55static void rulespec_outfp(FILE *fp, struct devfs_rule *dr);
56
57static command_t rule_add, rule_apply, rule_applyset;
58static command_t rule_del, rule_delset, rule_show, rule_showsets;
59
60static ctbl_t ctbl_rule = {
61 { "add", rule_add },
62 { "apply", rule_apply },
63 { "applyset", rule_applyset },
64 { "del", rule_del },
65 { "delset", rule_delset },
66 { "show", rule_show },
67 { "showsets", rule_showsets },
68 { NULL, NULL }
69};
70
71static struct intstr ist_type[] = {
72 { "disk", D_DISK },
73 { "mem", D_MEM },
74 { "tape", D_TAPE },
75 { "tty", D_TTY },
76 { NULL, -1 }
77};
78
79devfs_rsnum in_rsnum;
80
81int
82rule_main(int ac, char **av)
83{
84 struct cmd *c;
85 char ch;
85 int ch;
86
87 setprogname("devfs rule");
88 optreset = optind = 1;
89 while ((ch = getopt(ac, av, "s:")) != -1)
90 switch (ch) {
91 case 's':
92 in_rsnum = eatonum(optarg);
93 break;
94 default:
95 usage();
96 }
97 ac -= optind;
98 av += optind;
99 if (ac < 1)
100 usage();
101
102 for (c = ctbl_rule; c->name != NULL; ++c)
103 if (strcmp(c->name, av[0]) == 0)
104 exit((*c->handler)(ac, av));
105 errx(1, "unknown command: %s", av[0]);
106}
107
108static int
109rule_add(int ac, char **av)
110{
111 struct devfs_rule dr;
112 int rv;
113
114 if (ac < 2)
115 usage();
116 if (strcmp(av[1], "-") == 0)
117 rulespec_infp(stdin, DEVFSIO_RADD, in_rsnum);
118 else {
119 rulespec_intok(&dr, ac - 1, av + 1, in_rsnum);
120 rv = ioctl(mpfd, DEVFSIO_RADD, &dr);
121 if (rv == -1)
122 err(1, "ioctl DEVFSIO_RADD");
123 }
124 return (0);
125}
126
127static int
128rule_apply(int ac __unused, char **av __unused)
129{
130 struct devfs_rule dr;
131 devfs_rnum rnum;
132 devfs_rid rid;
133 int rv;
134
135 if (ac < 2)
136 usage();
137 if (!atonum(av[1], &rnum)) {
138 if (strcmp(av[1], "-") == 0)
139 rulespec_infp(stdin, DEVFSIO_RAPPLY, in_rsnum);
140 else {
141 rulespec_intok(&dr, ac - 1, av + 1, in_rsnum);
142 rv = ioctl(mpfd, DEVFSIO_RAPPLY, &dr);
143 if (rv == -1)
144 err(1, "ioctl DEVFSIO_RAPPLY");
145 }
146 } else {
147 rid = mkrid(in_rsnum, rnum);
148 rv = ioctl(mpfd, DEVFSIO_RAPPLYID, &rid);
149 if (rv == -1)
150 err(1, "ioctl DEVFSIO_RAPPLYID");
151 }
152 return (0);
153}
154
155static int
156rule_applyset(int ac, char **av __unused)
157{
158 int rv;
159
160 if (ac != 1)
161 usage();
162 rv = ioctl(mpfd, DEVFSIO_SAPPLY, &in_rsnum);
163 if (rv == -1)
164 err(1, "ioctl DEVFSIO_SAPPLY");
165 return (0);
166}
167
168static int
169rule_del(int ac __unused, char **av)
170{
171 devfs_rid rid;
172 int rv;
173
174 if (av[1] == NULL)
175 usage();
176 rid = mkrid(in_rsnum, eatoi(av[1]));
177 rv = ioctl(mpfd, DEVFSIO_RDEL, &rid);
178 if (rv == -1)
179 err(1, "ioctl DEVFSIO_RDEL");
180 return (0);
181}
182
183static int
184rule_delset(int ac, char **av __unused)
185{
186 struct devfs_rule dr;
187 int rv;
188
189 if (ac != 1)
190 usage();
191 memset(&dr, '\0', sizeof(dr));
192 dr.dr_magic = DEVFS_MAGIC;
193 dr.dr_id = mkrid(in_rsnum, 0);
194 while (ioctl(mpfd, DEVFSIO_RGETNEXT, &dr) != -1) {
195 rv = ioctl(mpfd, DEVFSIO_RDEL, &dr.dr_id);
196 if (rv == -1)
197 err(1, "ioctl DEVFSIO_RDEL");
198 }
199 if (errno != ENOENT)
200 err(1, "ioctl DEVFSIO_RGETNEXT");
201 return (0);
202}
203
204static int
205rule_show(int ac __unused, char **av)
206{
207 struct devfs_rule dr;
208 devfs_rnum rnum;
209 int rv;
210
211 memset(&dr, '\0', sizeof(dr));
212 dr.dr_magic = DEVFS_MAGIC;
213 if (av[1] != NULL) {
214 rnum = eatoi(av[1]);
215 dr.dr_id = mkrid(in_rsnum, rnum - 1);
216 rv = ioctl(mpfd, DEVFSIO_RGETNEXT, &dr);
217 if (rv == -1)
218 err(1, "ioctl DEVFSIO_RGETNEXT");
219 if (rid2rn(dr.dr_id) == rnum)
220 rulespec_outfp(stdout, &dr);
221 } else {
222 dr.dr_id = mkrid(in_rsnum, 0);
223 while (ioctl(mpfd, DEVFSIO_RGETNEXT, &dr) != -1)
224 rulespec_outfp(stdout, &dr);
225 if (errno != ENOENT)
226 err(1, "ioctl DEVFSIO_RGETNEXT");
227 }
228 return (0);
229}
230
231static int
232rule_showsets(int ac, char **av __unused)
233{
234 devfs_rsnum rsnum;
235
236 if (ac != 1)
237 usage();
238 rsnum = 0;
239 while (ioctl(mpfd, DEVFSIO_SGETNEXT, &rsnum) != -1)
240 printf("%d\n", rsnum);
241 if (errno != ENOENT)
242 err(1, "ioctl DEVFSIO_SGETNEXT");
243 return (0);
244}
245
246int
247ruleset_main(int ac, char **av)
248{
249 devfs_rsnum rsnum;
250 int rv;
251
252 setprogname("devfs ruleset");
253 if (ac < 2)
254 usage();
255 rsnum = eatonum(av[1]);
256 rv = ioctl(mpfd, DEVFSIO_SUSE, &rsnum);
257 if (rv == -1)
258 err(1, "ioctl DEVFSIO_SUSE");
259 return (0);
260}
261
262
263/*
264 * Input rules from a file (probably the standard input). This
265 * differs from the other rulespec_in*() routines in that it also
266 * calls ioctl() for the rules, since it is impractical (and not very
267 * useful) to return a list (or array) of rules, just so the caller
268 * can call call ioctl() for each of them.
269 */
270static void
271rulespec_infp(FILE *fp, unsigned long request, devfs_rsnum rsnum)
272{
273 struct devfs_rule dr;
274 char *line;
275 int rv;
276
277 assert(fp == stdin); /* XXX: De-hardcode "stdin" from error msg. */
278 while (efgetln(fp, &line)) {
279 rulespec_instr(&dr, line, rsnum);
280 rv = ioctl(mpfd, request, &dr);
281 if (rv == -1)
282 err(1, "ioctl");
283 free(line); /* efgetln() always malloc()s. */
284 }
285 if (ferror(stdin))
286 err(1, "stdin");
287}
288
289/*
290 * Construct a /struct devfs_rule/ from a string.
291 */
292static void
293rulespec_instr(struct devfs_rule *dr, const char *str, devfs_rsnum rsnum)
294{
295 char **av;
296 int ac;
297
298 tokenize(str, &ac, &av);
299 if (ac == 0)
300 errx(1, "unexpected end of rulespec");
301 rulespec_intok(dr, ac, av, rsnum);
302 free(av[0]);
303 free(av);
304}
305
306/*
307 * Construct a /struct devfs_rule/ from ac and av.
308 */
309static void
310rulespec_intok(struct devfs_rule *dr, int ac __unused, char **av,
311 devfs_rsnum rsnum)
312{
313 struct intstr *is;
314 struct passwd *pw;
315 struct group *gr;
316 devfs_rnum rnum;
317 char *cp;
318 long l;
319
320 memset(dr, '\0', sizeof(*dr));
321
322 /*
323 * We don't maintain ac hereinafter.
324 */
325 if (av[0] == NULL)
326 errx(1, "unexpected end of rulespec");
327
328 /* If the first argument is an integer, treat it as a rule number. */
329 if (!atonum(av[0], &rnum))
330 rnum = 0; /* auto-number */
331 else
332 ++av;
333
334 /*
335 * These aren't table-driven since that would result in more
336 * tiny functions than I care to deal with.
337 */
338 for (;;) {
339 if (av[0] == NULL)
340 break;
341 else if (strcmp(av[0], "type") == 0) {
342 if (av[1] == NULL)
343 errx(1, "expecting argument for type");
344 for (is = ist_type; is->s != NULL; ++is)
345 if (strcmp(av[1], is->s) == 0) {
346 dr->dr_dswflags |= is->i;
347 break;
348 }
349 if (is->s == NULL)
350 errx(1, "unknown type: %s", av[1]);
351 dr->dr_icond |= DRC_DSWFLAGS;
352 av += 2;
353 } else if (strcmp(av[0], "path") == 0) {
354 if (av[1] == NULL)
355 errx(1, "expecting argument for path");
356 if (strlcpy(dr->dr_pathptrn, av[1], DEVFS_MAXPTRNLEN)
357 >= DEVFS_MAXPTRNLEN)
358 warnx("pattern specified too long; truncated");
359 dr->dr_icond |= DRC_PATHPTRN;
360 av += 2;
361 } else if (strcmp(av[0], "major") == 0) {
362 if (av[1] == NULL)
363 errx(1, "expecting argument for major");
364 dr->dr_major = eatoi(av[1]);
365 dr->dr_icond |= DRC_MAJOR;
366 av += 2;
367 } else
368 break;
369 }
370 for (;;) {
371 if (av[0] == NULL)
372 break;
373 else if (strcmp(av[0], "hide") == 0) {
374 dr->dr_iacts |= DRA_BACTS;
375 dr->dr_bacts |= DRB_HIDE;
376 ++av;
377 } else if (strcmp(av[0], "unhide") == 0) {
378 dr->dr_iacts |= DRA_BACTS;
379 dr->dr_bacts |= DRB_UNHIDE;
380 ++av;
381 } else if (strcmp(av[0], "user") == 0) {
382 if (av[1] == NULL)
383 errx(1, "expecting argument for user");
384 dr->dr_iacts |= DRA_UID;
385 pw = getpwnam(av[1]);
386 if (pw != NULL)
387 dr->dr_uid = pw->pw_uid;
388 else
389 dr->dr_uid = eatoi(av[1]); /* XXX overflow */
390 av += 2;
391 } else if (strcmp(av[0], "group") == 0) {
392 if (av[1] == NULL)
393 errx(1, "expecting argument for group");
394 dr->dr_iacts |= DRA_GID;
395 gr = getgrnam(av[1]);
396 if (gr != NULL)
397 dr->dr_gid = gr->gr_gid;
398 else
399 dr->dr_gid = eatoi(av[1]); /* XXX overflow */
400 av += 2;
401 } else if (strcmp(av[0], "mode") == 0) {
402 if (av[1] == NULL)
403 errx(1, "expecting argument for mode");
404 dr->dr_iacts |= DRA_MODE;
405 l = strtol(av[1], &cp, 8);
406 if (l > (1 << (sizeof(dr->dr_mode) * 8)) - 1 ||
407 *cp != '\0')
408 errx(1, "invalid mode: %s", av[1]);
409 dr->dr_mode = l;
410 av += 2;
411 } else if (strcmp(av[0], "include") == 0) {
412 if (av[1] == NULL)
413 errx(1, "expecting argument for include");
414 dr->dr_iacts |= DRA_INCSET;
415 dr->dr_incset = eatonum(av[1]);
416 av += 2;
417 } else
418 errx(1, "unknown argument: %s", av[0]);
419 }
420
421 dr->dr_id = mkrid(rsnum, rnum);
422 dr->dr_magic = DEVFS_MAGIC;
423}
424
425/*
426 * Write a human-readable (and machine-parsable, by rulespec_in*())
427 * representation of dr to bufp. *bufp should be free(3)'d when the
428 * caller is finished with it.
429 */
430static void
431rulespec_outfp(FILE *fp, struct devfs_rule *dr)
432{
433 struct intstr *is;
434 struct passwd *pw;
435 struct group *gr;
436
437 fprintf(fp, "%d", rid2rn(dr->dr_id));
438
439 if (dr->dr_icond & DRC_DSWFLAGS)
440 for (is = ist_type; is->s != NULL; ++is)
441 if (dr->dr_dswflags & is->i)
442 fprintf(fp, " type %s", is->s);
443 if (dr->dr_icond & DRC_PATHPTRN)
444 fprintf(fp, " path %s", dr->dr_pathptrn);
445 if (dr->dr_icond & DRC_MAJOR)
446 fprintf(fp, " major %d", dr->dr_major);
447
448 if (dr->dr_iacts & DRA_BACTS) {
449 if (dr->dr_bacts & DRB_HIDE)
450 fprintf(fp, " hide");
451 if (dr->dr_bacts & DRB_UNHIDE)
452 fprintf(fp, " unhide");
453 }
454 if (dr->dr_iacts & DRA_UID) {
455 pw = getpwuid(dr->dr_uid);
456 if (pw == NULL)
457 fprintf(fp, " user %d", dr->dr_uid);
458 else
459 fprintf(fp, " user %s", pw->pw_name);
460 }
461 if (dr->dr_iacts & DRA_GID) {
462 gr = getgrgid(dr->dr_gid);
463 if (gr == NULL)
464 fprintf(fp, " group %d", dr->dr_gid);
465 else
466 fprintf(fp, " group %s", gr->gr_name);
467 }
468 if (dr->dr_iacts & DRA_MODE)
469 fprintf(fp, " mode %o", dr->dr_mode);
470 if (dr->dr_iacts & DRA_INCSET)
471 fprintf(fp, " include %d", dr->dr_incset);
472
473 fprintf(fp, "\n");
474}