xref: /minix3/usr.sbin/mtree/compare.c (revision f5cfab17d6413e078dce9ac989b064b527446211) 
1 /*	$NetBSD: compare.c,v 1.55 2012/10/05 00:59:35 christos Exp $	*/
2 
3 /*-
4  * Copyright (c) 1989, 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  * 3. 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 
32 #if HAVE_NBTOOL_CONFIG_H
33 #include "nbtool_config.h"
34 #endif
35 
36 #include <sys/cdefs.h>
37 #if defined(__RCSID) && !defined(lint)
38 #if 0
39 static char sccsid[] = "@(#)compare.c	8.1 (Berkeley) 6/6/93";
40 #else
41 __RCSID("$NetBSD: compare.c,v 1.55 2012/10/05 00:59:35 christos Exp $");
42 #endif
43 #endif /* not lint */
44 
45 #include <sys/param.h>
46 #include <sys/stat.h>
47 
48 #include <errno.h>
49 #include <fcntl.h>
50 #include <stdio.h>
51 #include <stdlib.h>
52 #include <string.h>
53 #include <time.h>
54 #include <unistd.h>
55 
56 #ifndef NO_MD5
57 #include <md5.h>
58 #endif
59 #ifndef NO_RMD160
60 #include <rmd160.h>
61 #endif
62 #ifndef NO_SHA1
63 #include <sha1.h>
64 #endif
65 #ifndef NO_SHA2
66 #include <sha2.h>
67 #endif
68 
69 #include "extern.h"
70 
71 #define	INDENTNAMELEN	8
72 #define MARK								\
73 do {									\
74 	len = printf("%s: ", RP(p));					\
75 	if (len > INDENTNAMELEN) {					\
76 		tab = "\t";						\
77 		printf("\n");						\
78 	} else {							\
79 		tab = "";						\
80 		printf("%*s", INDENTNAMELEN - (int)len, "");		\
81 	}								\
82 } while (0)
83 #define	LABEL if (!label++) MARK
84 
85 #if HAVE_STRUCT_STAT_ST_FLAGS
86 
87 
88 #define CHANGEFLAGS							\
89 	if (flags != p->fts_statp->st_flags) {				\
90 		char *sf;						\
91 		if (!label) {						\
92 			MARK;						\
93 			sf = flags_to_string(p->fts_statp->st_flags, "none"); \
94 			printf("%sflags (\"%s\"", tab, sf);		\
95 			free(sf);					\
96 		}							\
97 		if (lchflags(p->fts_accpath, flags)) {			\
98 			label++;					\
99 			printf(", not modified: %s)\n",			\
100 			    strerror(errno));				\
101 		} else {						\
102 			sf = flags_to_string(flags, "none");		\
103 			printf(", modified to \"%s\")\n", sf);		\
104 			free(sf);					\
105 		}							\
106 	}
107 
108 /* SETFLAGS:
109  * given pflags, additionally set those flags specified in s->st_flags and
110  * selected by mask (the other flags are left unchanged).
111  */
112 #define SETFLAGS(pflags, mask)						\
113 do {									\
114 	flags = (s->st_flags & (mask)) | (pflags);			\
115 	CHANGEFLAGS;							\
116 } while (0)
117 
118 /* CLEARFLAGS:
119  * given pflags, reset the flags specified in s->st_flags and selected by mask
120  * (the other flags are left unchanged).
121  */
122 #define CLEARFLAGS(pflags, mask)					\
123 do {									\
124 	flags = (~(s->st_flags & (mask)) & CH_MASK) & (pflags);		\
125 	CHANGEFLAGS;							\
126 } while (0)
127 #endif	/* HAVE_STRUCT_STAT_ST_FLAGS */
128 
129 #ifdef __minix
130 #if 0
131 int
132 lchmod(const char *path, mode_t flags)
133 {
134 	return -1;
135 }
136 
137 int
138 lchown(const char *path, uid_t owner, gid_t group)
139 {
140 	return -1;
141 }
142 #endif
143 
144 static int
145 utimes(const char *path, const struct timeval times[2])
146 {
147 	return -1;
148 }
149 #endif
150 
151 int
152 compare(NODE *s, FTSENT *p)
153 {
154 	u_int32_t len, val;
155 #if HAVE_STRUCT_STAT_ST_FLAGS
156 	u_int32_t flags;
157 #endif
158 	int fd, label;
159 	const char *cp, *tab;
160 #if !defined(NO_MD5) || !defined(NO_RMD160) || !defined(NO_SHA1) || !defined(NO_SHA2)
161 	char *digestbuf;
162 #endif
163 
164 	tab = NULL;
165 	label = 0;
166 	switch(s->type) {
167 	case F_BLOCK:
168 		if (!S_ISBLK(p->fts_statp->st_mode))
169 			goto typeerr;
170 		break;
171 	case F_CHAR:
172 		if (!S_ISCHR(p->fts_statp->st_mode))
173 			goto typeerr;
174 		break;
175 	case F_DIR:
176 		if (!S_ISDIR(p->fts_statp->st_mode))
177 			goto typeerr;
178 		break;
179 	case F_FIFO:
180 		if (!S_ISFIFO(p->fts_statp->st_mode))
181 			goto typeerr;
182 		break;
183 	case F_FILE:
184 		if (!S_ISREG(p->fts_statp->st_mode))
185 			goto typeerr;
186 		break;
187 	case F_LINK:
188 		if (!S_ISLNK(p->fts_statp->st_mode))
189 			goto typeerr;
190 		break;
191 #ifdef S_ISSOCK
192 	case F_SOCK:
193 		if (!S_ISSOCK(p->fts_statp->st_mode))
194 			goto typeerr;
195 		break;
196 #endif
197 typeerr:		LABEL;
198 		printf("\ttype (%s, %s)\n",
199 		    nodetype(s->type), inotype(p->fts_statp->st_mode));
200 		return (label);
201 	}
202 	if (mtree_Wflag)
203 		goto afterpermwhack;
204 #if HAVE_STRUCT_STAT_ST_FLAGS
205 	if (iflag && !uflag) {
206 		if (s->flags & F_FLAGS)
207 		    SETFLAGS(p->fts_statp->st_flags, SP_FLGS);
208 		return (label);
209         }
210 	if (mflag && !uflag) {
211 		if (s->flags & F_FLAGS)
212 		    CLEARFLAGS(p->fts_statp->st_flags, SP_FLGS);
213 		return (label);
214         }
215 #endif
216 	if (s->flags & F_DEV &&
217 	    (s->type == F_BLOCK || s->type == F_CHAR) &&
218 	    s->st_rdev != p->fts_statp->st_rdev) {
219 		LABEL;
220 		printf("%sdevice (%#llx, %#llx",
221 		    tab, (long long)s->st_rdev,
222 		    (long long)p->fts_statp->st_rdev);
223 		if (uflag) {
224 			if ((unlink(p->fts_accpath) == -1) ||
225 			    (mknod(p->fts_accpath,
226 			      s->st_mode | nodetoino(s->type),
227 			      s->st_rdev) == -1) ||
228 			    (lchown(p->fts_accpath, p->fts_statp->st_uid,
229 			      p->fts_statp->st_gid) == -1) )
230 				printf(", not modified: %s)\n",
231 				    strerror(errno));
232 			 else
233 				printf(", modified)\n");
234 		} else
235 			printf(")\n");
236 		tab = "\t";
237 	}
238 	/* Set the uid/gid first, then set the mode. */
239 	if (s->flags & (F_UID | F_UNAME) && s->st_uid != p->fts_statp->st_uid) {
240 		LABEL;
241 		printf("%suser (%lu, %lu",
242 		    tab, (u_long)s->st_uid, (u_long)p->fts_statp->st_uid);
243 		if (uflag) {
244 			if (lchown(p->fts_accpath, s->st_uid, -1))
245 				printf(", not modified: %s)\n",
246 				    strerror(errno));
247 			else
248 				printf(", modified)\n");
249 		} else
250 			printf(")\n");
251 		tab = "\t";
252 	}
253 	if (s->flags & (F_GID | F_GNAME) && s->st_gid != p->fts_statp->st_gid) {
254 		LABEL;
255 		printf("%sgid (%lu, %lu",
256 		    tab, (u_long)s->st_gid, (u_long)p->fts_statp->st_gid);
257 		if (uflag) {
258 			if (lchown(p->fts_accpath, -1, s->st_gid))
259 				printf(", not modified: %s)\n",
260 				    strerror(errno));
261 			else
262 				printf(", modified)\n");
263 		}
264 		else
265 			printf(")\n");
266 		tab = "\t";
267 	}
268 	if (s->flags & F_MODE &&
269 	    s->st_mode != (p->fts_statp->st_mode & MBITS)) {
270 		if (lflag) {
271 			mode_t tmode, mode;
272 
273 			tmode = s->st_mode;
274 			mode = p->fts_statp->st_mode & MBITS;
275 			/*
276 			 * if none of the suid/sgid/etc bits are set,
277 			 * then if the mode is a subset of the target,
278 			 * skip.
279 			 */
280 			if (!((tmode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) ||
281 			    (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO))))
282 				if ((mode | tmode) == tmode)
283 					goto skip;
284 		}
285 
286 		LABEL;
287 		printf("%spermissions (%#lo, %#lo",
288 		    tab, (u_long)s->st_mode,
289 		    (u_long)p->fts_statp->st_mode & MBITS);
290 		if (uflag) {
291 			if (lchmod(p->fts_accpath, s->st_mode))
292 				printf(", not modified: %s)\n",
293 				    strerror(errno));
294 			else
295 				printf(", modified)\n");
296 		}
297 		else
298 			printf(")\n");
299 		tab = "\t";
300 	skip:	;
301 	}
302 	if (s->flags & F_NLINK && s->type != F_DIR &&
303 	    s->st_nlink != p->fts_statp->st_nlink) {
304 		LABEL;
305 		printf("%slink count (%lu, %lu)\n",
306 		    tab, (u_long)s->st_nlink, (u_long)p->fts_statp->st_nlink);
307 		tab = "\t";
308 	}
309 	if (s->flags & F_SIZE && s->st_size != p->fts_statp->st_size) {
310 		LABEL;
311 		printf("%ssize (%lld, %lld)\n",
312 		    tab, (long long)s->st_size,
313 		    (long long)p->fts_statp->st_size);
314 		tab = "\t";
315 	}
316 	/*
317 	 * XXX
318 	 * Since utimes(2) only takes a timeval, there's no point in
319 	 * comparing the low bits of the timespec nanosecond field.  This
320 	 * will only result in mismatches that we can never fix.
321 	 *
322 	 * Doesn't display microsecond differences.
323 	 */
324 	if (s->flags & F_TIME) {
325 		struct timeval tv[2];
326 		struct stat *ps = p->fts_statp;
327 		time_t smtime = s->st_mtimespec.tv_sec;
328 
329 #if defined(BSD4_4) && !defined(HAVE_NBTOOL_CONFIG_H)
330 		time_t pmtime = ps->st_mtimespec.tv_sec;
331 
332 		TIMESPEC_TO_TIMEVAL(&tv[0], &s->st_mtimespec);
333 		TIMESPEC_TO_TIMEVAL(&tv[1], &ps->st_mtimespec);
334 #else
335 		time_t pmtime = (time_t)ps->st_mtime;
336 
337 		tv[0].tv_sec = smtime;
338 		tv[0].tv_usec = 0;
339 		tv[1].tv_sec = pmtime;
340 		tv[1].tv_usec = 0;
341 #endif
342 
343 		if (tv[0].tv_sec != tv[1].tv_sec ||
344 		    tv[0].tv_usec != tv[1].tv_usec) {
345 			LABEL;
346 			printf("%smodification time (%.24s, ",
347 			    tab, ctime(&smtime));
348 			printf("%.24s", ctime(&pmtime));
349 			if (tflag) {
350 				tv[1] = tv[0];
351 				if (utimes(p->fts_accpath, tv))
352 					printf(", not modified: %s)\n",
353 					    strerror(errno));
354 				else
355 					printf(", modified)\n");
356 			} else
357 				printf(")\n");
358 			tab = "\t";
359 		}
360 	}
361 #if HAVE_STRUCT_STAT_ST_FLAGS
362 	/*
363 	 * XXX
364 	 * since lchflags(2) will reset file times, the utimes() above
365 	 * may have been useless!  oh well, we'd rather have correct
366 	 * flags, rather than times?
367 	 */
368         if ((s->flags & F_FLAGS) && ((s->st_flags != p->fts_statp->st_flags)
369 	    || mflag || iflag)) {
370 		if (s->st_flags != p->fts_statp->st_flags) {
371 			char *f_s;
372 			LABEL;
373 			f_s = flags_to_string(s->st_flags, "none");
374 			printf("%sflags (\"%s\" is not ", tab, f_s);
375 			free(f_s);
376 			f_s = flags_to_string(p->fts_statp->st_flags, "none");
377 			printf("\"%s\"", f_s);
378 			free(f_s);
379 		}
380 		if (uflag) {
381 			if (iflag)
382 				SETFLAGS(0, CH_MASK);
383 			else if (mflag)
384 				CLEARFLAGS(0, SP_FLGS);
385 			else
386 				SETFLAGS(0, (~SP_FLGS & CH_MASK));
387 		} else
388 			printf(")\n");
389 		tab = "\t";
390 	}
391 #endif	/* HAVE_STRUCT_STAT_ST_FLAGS */
392 
393 	/*
394 	 * from this point, no more permission checking or whacking
395 	 * occurs, only checking of stuff like checksums and symlinks.
396 	 */
397  afterpermwhack:
398 	if (s->flags & F_CKSUM) {
399 		if ((fd = open(p->fts_accpath, O_RDONLY, 0)) < 0) {
400 			LABEL;
401 			printf("%scksum: %s: %s\n",
402 			    tab, p->fts_accpath, strerror(errno));
403 			tab = "\t";
404 		} else if (crc(fd, &val, &len)) {
405 			close(fd);
406 			LABEL;
407 			printf("%scksum: %s: %s\n",
408 			    tab, p->fts_accpath, strerror(errno));
409 			tab = "\t";
410 		} else {
411 			close(fd);
412 			if (s->cksum != val) {
413 				LABEL;
414 				printf("%scksum (%lu, %lu)\n",
415 				    tab, s->cksum, (unsigned long)val);
416 			}
417 			tab = "\t";
418 		}
419 	}
420 #ifndef NO_MD5
421 	if (s->flags & F_MD5) {
422 		if ((digestbuf = MD5File(p->fts_accpath, NULL)) == NULL) {
423 			LABEL;
424 			printf("%s%s: %s: %s\n",
425 			    tab, MD5KEY, p->fts_accpath, strerror(errno));
426 			tab = "\t";
427 		} else {
428 			if (strcmp(s->md5digest, digestbuf)) {
429 				LABEL;
430 				printf("%s%s (0x%s, 0x%s)\n",
431 				    tab, MD5KEY, s->md5digest, digestbuf);
432 			}
433 			tab = "\t";
434 			free(digestbuf);
435 		}
436 	}
437 #endif	/* ! NO_MD5 */
438 #ifndef NO_RMD160
439 	if (s->flags & F_RMD160) {
440 		if ((digestbuf = RMD160File(p->fts_accpath, NULL)) == NULL) {
441 			LABEL;
442 			printf("%s%s: %s: %s\n",
443 			    tab, RMD160KEY, p->fts_accpath, strerror(errno));
444 			tab = "\t";
445 		} else {
446 			if (strcmp(s->rmd160digest, digestbuf)) {
447 				LABEL;
448 				printf("%s%s (0x%s, 0x%s)\n",
449 				    tab, RMD160KEY, s->rmd160digest, digestbuf);
450 			}
451 			tab = "\t";
452 			free(digestbuf);
453 		}
454 	}
455 #endif	/* ! NO_RMD160 */
456 #ifndef NO_SHA1
457 	if (s->flags & F_SHA1) {
458 		if ((digestbuf = SHA1File(p->fts_accpath, NULL)) == NULL) {
459 			LABEL;
460 			printf("%s%s: %s: %s\n",
461 			    tab, SHA1KEY, p->fts_accpath, strerror(errno));
462 			tab = "\t";
463 		} else {
464 			if (strcmp(s->sha1digest, digestbuf)) {
465 				LABEL;
466 				printf("%s%s (0x%s, 0x%s)\n",
467 				    tab, SHA1KEY, s->sha1digest, digestbuf);
468 			}
469 			tab = "\t";
470 			free(digestbuf);
471 		}
472 	}
473 #endif	/* ! NO_SHA1 */
474 #ifndef NO_SHA2
475 	if (s->flags & F_SHA256) {
476 		if ((digestbuf = SHA256_File(p->fts_accpath, NULL)) == NULL) {
477 			LABEL;
478 			printf("%s%s: %s: %s\n",
479 			    tab, SHA256KEY, p->fts_accpath, strerror(errno));
480 			tab = "\t";
481 		} else {
482 			if (strcmp(s->sha256digest, digestbuf)) {
483 				LABEL;
484 				printf("%s%s (0x%s, 0x%s)\n",
485 				    tab, SHA256KEY, s->sha256digest, digestbuf);
486 			}
487 			tab = "\t";
488 			free(digestbuf);
489 		}
490 	}
491 #ifdef SHA384_BLOCK_LENGTH
492 	if (s->flags & F_SHA384) {
493 		if ((digestbuf = SHA384_File(p->fts_accpath, NULL)) == NULL) {
494 			LABEL;
495 			printf("%s%s: %s: %s\n",
496 			    tab, SHA384KEY, p->fts_accpath, strerror(errno));
497 			tab = "\t";
498 		} else {
499 			if (strcmp(s->sha384digest, digestbuf)) {
500 				LABEL;
501 				printf("%s%s (0x%s, 0x%s)\n",
502 				    tab, SHA384KEY, s->sha384digest, digestbuf);
503 			}
504 			tab = "\t";
505 			free(digestbuf);
506 		}
507 	}
508 #endif
509 	if (s->flags & F_SHA512) {
510 		if ((digestbuf = SHA512_File(p->fts_accpath, NULL)) == NULL) {
511 			LABEL;
512 			printf("%s%s: %s: %s\n",
513 			    tab, SHA512KEY, p->fts_accpath, strerror(errno));
514 			tab = "\t";
515 		} else {
516 			if (strcmp(s->sha512digest, digestbuf)) {
517 				LABEL;
518 				printf("%s%s (0x%s, 0x%s)\n",
519 				    tab, SHA512KEY, s->sha512digest, digestbuf);
520 			}
521 			tab = "\t";
522 			free(digestbuf);
523 		}
524 	}
525 #endif	/* ! NO_SHA2 */
526 	if (s->flags & F_SLINK &&
527 	    strcmp(cp = rlink(p->fts_accpath), s->slink)) {
528 		LABEL;
529 		printf("%slink ref (%s, %s", tab, cp, s->slink);
530 		if (uflag) {
531 			if ((unlink(p->fts_accpath) == -1) ||
532 			    (symlink(s->slink, p->fts_accpath) == -1) )
533 				printf(", not modified: %s)\n",
534 				    strerror(errno));
535 			else
536 				printf(", modified)\n");
537 		} else
538 			printf(")\n");
539 	}
540 	return (label);
541 }
542 
543 const char *
544 rlink(const char *name)
545 {
546 	static char lbuf[MAXPATHLEN];
547 	int len;
548 
549 	if ((len = readlink(name, lbuf, sizeof(lbuf) - 1)) == -1)
550 		mtree_err("%s: %s", name, strerror(errno));
551 	lbuf[len] = '\0';
552 	return (lbuf);
553 }
554