xref: /freebsd/contrib/mtree/compare.c (revision d184218c) 
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 int
130 compare(NODE *s, FTSENT *p)
131 {
132 	u_int32_t len, val, flags;
133 	int fd, label;
134 	const char *cp, *tab;
135 #if !defined(NO_MD5) || !defined(NO_RMD160) || !defined(NO_SHA1) || !defined(NO_SHA2)
136 	char *digestbuf;
137 #endif
138 
139 	tab = NULL;
140 	label = 0;
141 	switch(s->type) {
142 	case F_BLOCK:
143 		if (!S_ISBLK(p->fts_statp->st_mode))
144 			goto typeerr;
145 		break;
146 	case F_CHAR:
147 		if (!S_ISCHR(p->fts_statp->st_mode))
148 			goto typeerr;
149 		break;
150 	case F_DIR:
151 		if (!S_ISDIR(p->fts_statp->st_mode))
152 			goto typeerr;
153 		break;
154 	case F_FIFO:
155 		if (!S_ISFIFO(p->fts_statp->st_mode))
156 			goto typeerr;
157 		break;
158 	case F_FILE:
159 		if (!S_ISREG(p->fts_statp->st_mode))
160 			goto typeerr;
161 		break;
162 	case F_LINK:
163 		if (!S_ISLNK(p->fts_statp->st_mode))
164 			goto typeerr;
165 		break;
166 #ifdef S_ISSOCK
167 	case F_SOCK:
168 		if (!S_ISSOCK(p->fts_statp->st_mode))
169 			goto typeerr;
170 		break;
171 #endif
172 typeerr:		LABEL;
173 		printf("\ttype (%s, %s)\n",
174 		    nodetype(s->type), inotype(p->fts_statp->st_mode));
175 		return (label);
176 	}
177 	if (mtree_Wflag)
178 		goto afterpermwhack;
179 #if HAVE_STRUCT_STAT_ST_FLAGS
180 	if (iflag && !uflag) {
181 		if (s->flags & F_FLAGS)
182 		    SETFLAGS(p->fts_statp->st_flags, SP_FLGS);
183 		return (label);
184         }
185 	if (mflag && !uflag) {
186 		if (s->flags & F_FLAGS)
187 		    CLEARFLAGS(p->fts_statp->st_flags, SP_FLGS);
188 		return (label);
189         }
190 #endif
191 	if (s->flags & F_DEV &&
192 	    (s->type == F_BLOCK || s->type == F_CHAR) &&
193 	    s->st_rdev != p->fts_statp->st_rdev) {
194 		LABEL;
195 		printf("%sdevice (%#llx, %#llx",
196 		    tab, (long long)s->st_rdev,
197 		    (long long)p->fts_statp->st_rdev);
198 		if (uflag) {
199 			if ((unlink(p->fts_accpath) == -1) ||
200 			    (mknod(p->fts_accpath,
201 			      s->st_mode | nodetoino(s->type),
202 			      s->st_rdev) == -1) ||
203 			    (lchown(p->fts_accpath, p->fts_statp->st_uid,
204 			      p->fts_statp->st_gid) == -1) )
205 				printf(", not modified: %s)\n",
206 				    strerror(errno));
207 			 else
208 				printf(", modified)\n");
209 		} else
210 			printf(")\n");
211 		tab = "\t";
212 	}
213 	/* Set the uid/gid first, then set the mode. */
214 	if (s->flags & (F_UID | F_UNAME) && s->st_uid != p->fts_statp->st_uid) {
215 		LABEL;
216 		printf("%suser (%lu, %lu",
217 		    tab, (u_long)s->st_uid, (u_long)p->fts_statp->st_uid);
218 		if (uflag) {
219 			if (lchown(p->fts_accpath, s->st_uid, -1))
220 				printf(", not modified: %s)\n",
221 				    strerror(errno));
222 			else
223 				printf(", modified)\n");
224 		} else
225 			printf(")\n");
226 		tab = "\t";
227 	}
228 	if (s->flags & (F_GID | F_GNAME) && s->st_gid != p->fts_statp->st_gid) {
229 		LABEL;
230 		printf("%sgid (%lu, %lu",
231 		    tab, (u_long)s->st_gid, (u_long)p->fts_statp->st_gid);
232 		if (uflag) {
233 			if (lchown(p->fts_accpath, -1, s->st_gid))
234 				printf(", not modified: %s)\n",
235 				    strerror(errno));
236 			else
237 				printf(", modified)\n");
238 		}
239 		else
240 			printf(")\n");
241 		tab = "\t";
242 	}
243 	if (s->flags & F_MODE &&
244 	    s->st_mode != (p->fts_statp->st_mode & MBITS)) {
245 		if (lflag) {
246 			mode_t tmode, mode;
247 
248 			tmode = s->st_mode;
249 			mode = p->fts_statp->st_mode & MBITS;
250 			/*
251 			 * if none of the suid/sgid/etc bits are set,
252 			 * then if the mode is a subset of the target,
253 			 * skip.
254 			 */
255 			if (!((tmode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) ||
256 			    (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO))))
257 				if ((mode | tmode) == tmode)
258 					goto skip;
259 		}
260 
261 		LABEL;
262 		printf("%spermissions (%#lo, %#lo",
263 		    tab, (u_long)s->st_mode,
264 		    (u_long)p->fts_statp->st_mode & MBITS);
265 		if (uflag) {
266 			if (lchmod(p->fts_accpath, s->st_mode))
267 				printf(", not modified: %s)\n",
268 				    strerror(errno));
269 			else
270 				printf(", modified)\n");
271 		}
272 		else
273 			printf(")\n");
274 		tab = "\t";
275 	skip:	;
276 	}
277 	if (s->flags & F_NLINK && s->type != F_DIR &&
278 	    s->st_nlink != p->fts_statp->st_nlink) {
279 		LABEL;
280 		printf("%slink count (%lu, %lu)\n",
281 		    tab, (u_long)s->st_nlink, (u_long)p->fts_statp->st_nlink);
282 		tab = "\t";
283 	}
284 	if (s->flags & F_SIZE && s->st_size != p->fts_statp->st_size) {
285 		LABEL;
286 		printf("%ssize (%lld, %lld)\n",
287 		    tab, (long long)s->st_size,
288 		    (long long)p->fts_statp->st_size);
289 		tab = "\t";
290 	}
291 	/*
292 	 * XXX
293 	 * Since utimes(2) only takes a timeval, there's no point in
294 	 * comparing the low bits of the timespec nanosecond field.  This
295 	 * will only result in mismatches that we can never fix.
296 	 *
297 	 * Doesn't display microsecond differences.
298 	 */
299 	if (s->flags & F_TIME) {
300 		struct timeval tv[2];
301 		struct stat *ps = p->fts_statp;
302 		time_t smtime = s->st_mtimespec.tv_sec;
303 
304 #if defined(BSD4_4) && !defined(HAVE_NBTOOL_CONFIG_H)
305 		time_t pmtime = ps->st_mtimespec.tv_sec;
306 
307 		TIMESPEC_TO_TIMEVAL(&tv[0], &s->st_mtimespec);
308 		TIMESPEC_TO_TIMEVAL(&tv[1], &ps->st_mtimespec);
309 #else
310 		time_t pmtime = (time_t)ps->st_mtime;
311 
312 		tv[0].tv_sec = smtime;
313 		tv[0].tv_usec = 0;
314 		tv[1].tv_sec = pmtime;
315 		tv[1].tv_usec = 0;
316 #endif
317 
318 		if (tv[0].tv_sec != tv[1].tv_sec ||
319 		    tv[0].tv_usec != tv[1].tv_usec) {
320 			LABEL;
321 			printf("%smodification time (%.24s, ",
322 			    tab, ctime(&smtime));
323 			printf("%.24s", ctime(&pmtime));
324 			if (tflag) {
325 				tv[1] = tv[0];
326 				if (utimes(p->fts_accpath, tv))
327 					printf(", not modified: %s)\n",
328 					    strerror(errno));
329 				else
330 					printf(", modified)\n");
331 			} else
332 				printf(")\n");
333 			tab = "\t";
334 		}
335 	}
336 #if HAVE_STRUCT_STAT_ST_FLAGS
337 	/*
338 	 * XXX
339 	 * since lchflags(2) will reset file times, the utimes() above
340 	 * may have been useless!  oh well, we'd rather have correct
341 	 * flags, rather than times?
342 	 */
343         if ((s->flags & F_FLAGS) && ((s->st_flags != p->fts_statp->st_flags)
344 	    || mflag || iflag)) {
345 		if (s->st_flags != p->fts_statp->st_flags) {
346 			char *f_s;
347 			LABEL;
348 			f_s = flags_to_string(s->st_flags, "none");
349 			printf("%sflags (\"%s\" is not ", tab, f_s);
350 			free(f_s);
351 			f_s = flags_to_string(p->fts_statp->st_flags, "none");
352 			printf("\"%s\"", f_s);
353 			free(f_s);
354 		}
355 		if (uflag) {
356 			if (iflag)
357 				SETFLAGS(0, CH_MASK);
358 			else if (mflag)
359 				CLEARFLAGS(0, SP_FLGS);
360 			else
361 				SETFLAGS(0, (~SP_FLGS & CH_MASK));
362 		} else
363 			printf(")\n");
364 		tab = "\t";
365 	}
366 #endif	/* HAVE_STRUCT_STAT_ST_FLAGS */
367 
368 	/*
369 	 * from this point, no more permission checking or whacking
370 	 * occurs, only checking of stuff like checksums and symlinks.
371 	 */
372  afterpermwhack:
373 	if (s->flags & F_CKSUM) {
374 		if ((fd = open(p->fts_accpath, O_RDONLY, 0)) < 0) {
375 			LABEL;
376 			printf("%scksum: %s: %s\n",
377 			    tab, p->fts_accpath, strerror(errno));
378 			tab = "\t";
379 		} else if (crc(fd, &val, &len)) {
380 			close(fd);
381 			LABEL;
382 			printf("%scksum: %s: %s\n",
383 			    tab, p->fts_accpath, strerror(errno));
384 			tab = "\t";
385 		} else {
386 			close(fd);
387 			if (s->cksum != val) {
388 				LABEL;
389 				printf("%scksum (%lu, %lu)\n",
390 				    tab, s->cksum, (unsigned long)val);
391 			}
392 			tab = "\t";
393 		}
394 	}
395 #ifndef NO_MD5
396 	if (s->flags & F_MD5) {
397 		if ((digestbuf = MD5File(p->fts_accpath, NULL)) == NULL) {
398 			LABEL;
399 			printf("%s%s: %s: %s\n",
400 			    tab, MD5KEY, p->fts_accpath, strerror(errno));
401 			tab = "\t";
402 		} else {
403 			if (strcmp(s->md5digest, digestbuf)) {
404 				LABEL;
405 				printf("%s%s (0x%s, 0x%s)\n",
406 				    tab, MD5KEY, s->md5digest, digestbuf);
407 			}
408 			tab = "\t";
409 			free(digestbuf);
410 		}
411 	}
412 #endif	/* ! NO_MD5 */
413 #ifndef NO_RMD160
414 	if (s->flags & F_RMD160) {
415 		if ((digestbuf = RMD160File(p->fts_accpath, NULL)) == NULL) {
416 			LABEL;
417 			printf("%s%s: %s: %s\n",
418 			    tab, RMD160KEY, p->fts_accpath, strerror(errno));
419 			tab = "\t";
420 		} else {
421 			if (strcmp(s->rmd160digest, digestbuf)) {
422 				LABEL;
423 				printf("%s%s (0x%s, 0x%s)\n",
424 				    tab, RMD160KEY, s->rmd160digest, digestbuf);
425 			}
426 			tab = "\t";
427 			free(digestbuf);
428 		}
429 	}
430 #endif	/* ! NO_RMD160 */
431 #ifndef NO_SHA1
432 	if (s->flags & F_SHA1) {
433 		if ((digestbuf = SHA1File(p->fts_accpath, NULL)) == NULL) {
434 			LABEL;
435 			printf("%s%s: %s: %s\n",
436 			    tab, SHA1KEY, p->fts_accpath, strerror(errno));
437 			tab = "\t";
438 		} else {
439 			if (strcmp(s->sha1digest, digestbuf)) {
440 				LABEL;
441 				printf("%s%s (0x%s, 0x%s)\n",
442 				    tab, SHA1KEY, s->sha1digest, digestbuf);
443 			}
444 			tab = "\t";
445 			free(digestbuf);
446 		}
447 	}
448 #endif	/* ! NO_SHA1 */
449 #ifndef NO_SHA2
450 	if (s->flags & F_SHA256) {
451 		if ((digestbuf = SHA256_File(p->fts_accpath, NULL)) == NULL) {
452 			LABEL;
453 			printf("%s%s: %s: %s\n",
454 			    tab, SHA256KEY, p->fts_accpath, strerror(errno));
455 			tab = "\t";
456 		} else {
457 			if (strcmp(s->sha256digest, digestbuf)) {
458 				LABEL;
459 				printf("%s%s (0x%s, 0x%s)\n",
460 				    tab, SHA256KEY, s->sha256digest, digestbuf);
461 			}
462 			tab = "\t";
463 			free(digestbuf);
464 		}
465 	}
466 #ifdef SHA384_BLOCK_LENGTH
467 	if (s->flags & F_SHA384) {
468 		if ((digestbuf = SHA384_File(p->fts_accpath, NULL)) == NULL) {
469 			LABEL;
470 			printf("%s%s: %s: %s\n",
471 			    tab, SHA384KEY, p->fts_accpath, strerror(errno));
472 			tab = "\t";
473 		} else {
474 			if (strcmp(s->sha384digest, digestbuf)) {
475 				LABEL;
476 				printf("%s%s (0x%s, 0x%s)\n",
477 				    tab, SHA384KEY, s->sha384digest, digestbuf);
478 			}
479 			tab = "\t";
480 			free(digestbuf);
481 		}
482 	}
483 #endif
484 	if (s->flags & F_SHA512) {
485 		if ((digestbuf = SHA512_File(p->fts_accpath, NULL)) == NULL) {
486 			LABEL;
487 			printf("%s%s: %s: %s\n",
488 			    tab, SHA512KEY, p->fts_accpath, strerror(errno));
489 			tab = "\t";
490 		} else {
491 			if (strcmp(s->sha512digest, digestbuf)) {
492 				LABEL;
493 				printf("%s%s (0x%s, 0x%s)\n",
494 				    tab, SHA512KEY, s->sha512digest, digestbuf);
495 			}
496 			tab = "\t";
497 			free(digestbuf);
498 		}
499 	}
500 #endif	/* ! NO_SHA2 */
501 	if (s->flags & F_SLINK &&
502 	    strcmp(cp = rlink(p->fts_accpath), s->slink)) {
503 		LABEL;
504 		printf("%slink ref (%s, %s", tab, cp, s->slink);
505 		if (uflag) {
506 			if ((unlink(p->fts_accpath) == -1) ||
507 			    (symlink(s->slink, p->fts_accpath) == -1) )
508 				printf(", not modified: %s)\n",
509 				    strerror(errno));
510 			else
511 				printf(", modified)\n");
512 		} else
513 			printf(")\n");
514 	}
515 	return (label);
516 }
517 
518 const char *
519 rlink(const char *name)
520 {
521 	static char lbuf[MAXPATHLEN];
522 	int len;
523 
524 	if ((len = readlink(name, lbuf, sizeof(lbuf) - 1)) == -1)
525 		mtree_err("%s: %s", name, strerror(errno));
526 	lbuf[len] = '\0';
527 	return (lbuf);
528 }
529