1/*	$NetBSD: compare.c,v 1.11 1996/09/05 09:56:48 mycroft Exp $	*/
2/*	$OpenBSD: compare.c,v 1.31 2024/04/23 13:34:51 jsg Exp $	*/
3
4/*-
5 * Copyright (c) 1989, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/stat.h>
34#include <fcntl.h>
35#include <fts.h>
36#include <errno.h>
37#include <stdio.h>
38#include <time.h>
39#include <unistd.h>
40#include <limits.h>
41#include <md5.h>
42#include <rmd160.h>
43#include <sha1.h>
44#include <sha2.h>
45#include "mtree.h"
46#include "extern.h"
47
48extern int lflag, tflag, uflag;
49
50static char *ftype(u_int);
51
52#define	INDENTNAMELEN	8
53#define	LABEL \
54	if (!label++) { \
55		len = printf("%s: ", RP(p)); \
56		if (len > INDENTNAMELEN) { \
57			tab = "\t"; \
58			(void)printf("\n"); \
59		} else { \
60			tab = ""; \
61			(void)printf("%*s", INDENTNAMELEN - (int)len, ""); \
62		} \
63	}
64
65#define REPLACE_COMMA(x)						\
66	do {								\
67		char *l;						\
68		for (l = x; *l; l++) {					\
69			if (*l == ',')					\
70				*l = ' ';				\
71		}							\
72	} while (0)							\
73
74int
75compare(char *name, NODE *s, FTSENT *p)
76{
77	u_int32_t len, val;
78	int fd, label;
79	char *cp, *tab = "";
80
81	label = 0;
82	switch(s->type) {
83	case F_BLOCK:
84		if (!S_ISBLK(p->fts_statp->st_mode))
85			goto typeerr;
86		break;
87	case F_CHAR:
88		if (!S_ISCHR(p->fts_statp->st_mode))
89			goto typeerr;
90		break;
91	case F_DIR:
92		if (!S_ISDIR(p->fts_statp->st_mode))
93			goto typeerr;
94		break;
95	case F_FIFO:
96		if (!S_ISFIFO(p->fts_statp->st_mode))
97			goto typeerr;
98		break;
99	case F_FILE:
100		if (!S_ISREG(p->fts_statp->st_mode))
101			goto typeerr;
102		break;
103	case F_LINK:
104		if (!S_ISLNK(p->fts_statp->st_mode))
105			goto typeerr;
106		break;
107	case F_SOCK:
108		if (!S_ISSOCK(p->fts_statp->st_mode)) {
109typeerr:		LABEL;
110			(void)printf("\ttype (%s, %s)\n",
111			    ftype(s->type), inotype(p->fts_statp->st_mode));
112		}
113		break;
114	}
115	/* Set the uid/gid first, then set the mode. */
116	if (s->flags & (F_UID | F_UNAME) && s->st_uid != p->fts_statp->st_uid) {
117		LABEL;
118		(void)printf("%suser (%u, %u",
119		    tab, s->st_uid, p->fts_statp->st_uid);
120		if (uflag)
121			if (chown(p->fts_accpath, s->st_uid, -1))
122				(void)printf(", not modified: %s)\n",
123				    strerror(errno));
124			else
125				(void)printf(", modified)\n");
126		else
127			(void)printf(")\n");
128		tab = "\t";
129	}
130	if (s->flags & (F_GID | F_GNAME) && s->st_gid != p->fts_statp->st_gid) {
131		LABEL;
132		(void)printf("%sgid (%u, %u",
133		    tab, s->st_gid, p->fts_statp->st_gid);
134		if (uflag)
135			if (chown(p->fts_accpath, -1, s->st_gid))
136				(void)printf(", not modified: %s)\n",
137				    strerror(errno));
138			else
139				(void)printf(", modified)\n");
140		else
141			(void)printf(")\n");
142		tab = "\t";
143	}
144	if (s->flags & F_MODE &&
145	    s->st_mode != (p->fts_statp->st_mode & MBITS)) {
146		if (lflag) {
147			mode_t tmode, mode;
148
149			tmode = s->st_mode;
150			mode = p->fts_statp->st_mode & MBITS;
151			/*
152			 * if none of the suid/sgid/etc bits are set,
153			 * then if the mode is a subset of the target,
154			 * skip.
155			 */
156			if (!((tmode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) ||
157			    (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO))))
158				if ((mode | tmode) == tmode)
159					goto skip;
160		}
161		LABEL;
162		(void)printf("%spermissions (%#o, %#o",
163		    tab, s->st_mode, p->fts_statp->st_mode & MBITS);
164		if (uflag)
165			if (chmod(p->fts_accpath, s->st_mode))
166				(void)printf(", not modified: %s)\n",
167				    strerror(errno));
168			else
169				(void)printf(", modified)\n");
170		else
171			(void)printf(")\n");
172		tab = "\t";
173	skip:
174		;
175	}
176	if (s->flags & F_NLINK && s->type != F_DIR &&
177	    s->st_nlink != p->fts_statp->st_nlink) {
178		LABEL;
179		(void)printf("%slink count (%u, %u)\n",
180		    tab, s->st_nlink, p->fts_statp->st_nlink);
181		tab = "\t";
182	}
183	if (s->flags & F_SIZE && s->st_size != p->fts_statp->st_size) {
184		LABEL;
185		(void)printf("%ssize (%lld, %lld)\n",
186		    tab, (long long)s->st_size,
187		    (long long)p->fts_statp->st_size);
188		tab = "\t";
189	}
190	/*
191	 * XXX
192	 * Since utimes(2) only takes a timeval, there's no point in
193	 * comparing the low bits of the timespec nanosecond field.  This
194	 * will only result in mismatches that we can never fix.
195	 *
196	 * Doesn't display microsecond differences.
197	 */
198	if (s->flags & F_TIME) {
199		struct timespec ts[2];
200
201		ts[0] = s->st_mtim;
202		ts[1] = p->fts_statp->st_mtim;
203		if (ts[0].tv_sec != ts[1].tv_sec ||
204		    ts[0].tv_nsec != ts[1].tv_nsec) {
205			LABEL;
206			(void)printf("%smodification time (%.24s, ",
207			    tab, ctime(&s->st_mtime));
208			(void)printf("%.24s", ctime(&p->fts_statp->st_mtime));
209			if (tflag) {
210				ts[1] = ts[0];
211				if (utimensat(AT_FDCWD, p->fts_accpath, ts, 0))
212					(void)printf(", not modified: %s)\n",
213					    strerror(errno));
214				else
215					(void)printf(", modified)\n");
216			} else
217				(void)printf(")\n");
218			tab = "\t";
219		}
220	}
221	if (s->flags & F_CKSUM) {
222		if ((fd = open(p->fts_accpath, MTREE_O_FLAGS)) == -1) {
223			LABEL;
224			(void)printf("%scksum: %s: %s\n",
225			    tab, p->fts_accpath, strerror(errno));
226			tab = "\t";
227		} else if (crc(fd, &val, &len)) {
228			(void)close(fd);
229			LABEL;
230			(void)printf("%scksum: %s: %s\n",
231			    tab, p->fts_accpath, strerror(errno));
232			tab = "\t";
233		} else {
234			(void)close(fd);
235			if (s->cksum != val) {
236				LABEL;
237				(void)printf("%scksum (%u, %u)\n",
238				    tab, s->cksum, val);
239			}
240			tab = "\t";
241		}
242	}
243	if (s->flags & F_MD5) {
244		char *new_digest, buf[MD5_DIGEST_STRING_LENGTH];
245
246		new_digest = MD5File(p->fts_accpath, buf);
247		if (!new_digest) {
248			LABEL;
249			printf("%sMD5File: %s: %s\n", tab, p->fts_accpath,
250			       strerror(errno));
251			tab = "\t";
252		} else if (strcmp(new_digest, s->md5digest)) {
253			LABEL;
254			printf("%sMD5 (%s, %s)\n", tab, s->md5digest,
255			       new_digest);
256			tab = "\t";
257		}
258	}
259	if (s->flags & F_RMD160) {
260		char *new_digest, buf[RMD160_DIGEST_STRING_LENGTH];
261
262		new_digest = RMD160File(p->fts_accpath, buf);
263		if (!new_digest) {
264			LABEL;
265			printf("%sRMD160File: %s: %s\n", tab, p->fts_accpath,
266			       strerror(errno));
267			tab = "\t";
268		} else if (strcmp(new_digest, s->rmd160digest)) {
269			LABEL;
270			printf("%sRMD160 (%s, %s)\n", tab, s->rmd160digest,
271			       new_digest);
272			tab = "\t";
273		}
274	}
275	if (s->flags & F_SHA1) {
276		char *new_digest, buf[SHA1_DIGEST_STRING_LENGTH];
277
278		new_digest = SHA1File(p->fts_accpath, buf);
279		if (!new_digest) {
280			LABEL;
281			printf("%sSHA1File: %s: %s\n", tab, p->fts_accpath,
282			       strerror(errno));
283			tab = "\t";
284		} else if (strcmp(new_digest, s->sha1digest)) {
285			LABEL;
286			printf("%sSHA1 (%s, %s)\n", tab, s->sha1digest,
287			       new_digest);
288			tab = "\t";
289		}
290	}
291	if (s->flags & F_SHA256) {
292		char *new_digest, buf[SHA256_DIGEST_STRING_LENGTH];
293
294		new_digest = SHA256File(p->fts_accpath, buf);
295		if (!new_digest) {
296			LABEL;
297			printf("%sSHA256File: %s: %s\n", tab, p->fts_accpath,
298			       strerror(errno));
299			tab = "\t";
300		} else if (strcmp(new_digest, s->sha256digest)) {
301			LABEL;
302			printf("%sSHA256 (%s, %s)\n", tab, s->sha256digest,
303			       new_digest);
304			tab = "\t";
305		}
306	}
307	if (s->flags & F_SLINK && strcmp(cp = rlink(name), s->slink)) {
308		LABEL;
309		(void)printf("%slink ref (%s, %s)\n", tab, cp, s->slink);
310	}
311	if (s->flags & F_FLAGS && s->file_flags != p->fts_statp->st_flags) {
312		char *db_flags = NULL;
313		char *cur_flags = NULL;
314
315		if ((db_flags = fflagstostr(s->file_flags)) == NULL ||
316		    (cur_flags = fflagstostr(p->fts_statp->st_flags)) == NULL) {
317			LABEL;
318			(void)printf("%sflags: %s %s\n", tab, p->fts_accpath,
319				     strerror(errno));
320			tab = "\t";
321			free(db_flags);
322			free(cur_flags);
323		} else {
324			LABEL;
325			REPLACE_COMMA(db_flags);
326			REPLACE_COMMA(cur_flags);
327			printf("%sflags (%s, %s", tab, (*db_flags == '\0') ?
328						  "-" : db_flags,
329						  (*cur_flags == '\0') ?
330						  "-" : cur_flags);
331			tab = "\t";
332			if (uflag)
333				if (chflags(p->fts_accpath, s->file_flags))
334					(void)printf(", not modified: %s)\n",
335						strerror(errno));
336				else
337					(void)printf(", modified)\n");
338			else
339				(void)printf(")\n");
340			tab = "\t";
341
342			free(db_flags);
343			free(cur_flags);
344		}
345	}
346	return (label);
347}
348
349char *
350inotype(u_int type)
351{
352	switch(type & S_IFMT) {
353	case S_IFBLK:
354		return ("block");
355	case S_IFCHR:
356		return ("char");
357	case S_IFDIR:
358		return ("dir");
359	case S_IFIFO:
360		return ("fifo");
361	case S_IFREG:
362		return ("file");
363	case S_IFLNK:
364		return ("link");
365	case S_IFSOCK:
366		return ("socket");
367	default:
368		return ("unknown");
369	}
370	/* NOTREACHED */
371}
372
373static char *
374ftype(u_int type)
375{
376	switch(type) {
377	case F_BLOCK:
378		return ("block");
379	case F_CHAR:
380		return ("char");
381	case F_DIR:
382		return ("dir");
383	case F_FIFO:
384		return ("fifo");
385	case F_FILE:
386		return ("file");
387	case F_LINK:
388		return ("link");
389	case F_SOCK:
390		return ("socket");
391	default:
392		return ("unknown");
393	}
394	/* NOTREACHED */
395}
396
397char *
398rlink(char *name)
399{
400	static char lbuf[PATH_MAX];
401	int len;
402
403	if ((len = readlink(name, lbuf, sizeof(lbuf)-1)) == -1)
404		error("%s: %s", name, strerror(errno));
405	lbuf[len] = '\0';
406	return (lbuf);
407}
408