compare.c revision 256996 
1/*	$NetBSD: compare.c,v 1.56 2013/09/09 23:27:43 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
39static char sccsid[] = "@(#)compare.c	8.1 (Berkeley) 6/6/93";
40#else
41__RCSID("$NetBSD: compare.c,v 1.56 2013/09/09 23:27:43 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 <stdint.h>
51#include <stdio.h>
52#include <stdlib.h>
53#include <string.h>
54#include <time.h>
55#include <unistd.h>
56
57#ifndef NO_MD5
58#include <md5.h>
59#endif
60#ifndef NO_RMD160
61#include <rmd160.h>
62#endif
63#ifndef NO_SHA1
64#include <sha1.h>
65#endif
66#ifndef NO_SHA2
67#include <sha2.h>
68#endif
69
70#include "extern.h"
71
72#define	INDENTNAMELEN	8
73#define MARK								\
74do {									\
75	len = printf("%s: ", RP(p));					\
76	if (len > INDENTNAMELEN) {					\
77		tab = "\t";						\
78		printf("\n");						\
79	} else {							\
80		tab = "";						\
81		printf("%*s", INDENTNAMELEN - (int)len, "");		\
82	}								\
83} while (0)
84#define	LABEL if (!label++) MARK
85
86#if HAVE_STRUCT_STAT_ST_FLAGS
87
88
89#define CHANGEFLAGS							\
90	if (flags != p->fts_statp->st_flags) {				\
91		char *sf;						\
92		if (!label) {						\
93			MARK;						\
94			sf = flags_to_string(p->fts_statp->st_flags, "none"); \
95			printf("%sflags (\"%s\"", tab, sf);		\
96			free(sf);					\
97		}							\
98		if (lchflags(p->fts_accpath, flags)) {			\
99			label++;					\
100			printf(", not modified: %s)\n",			\
101			    strerror(errno));				\
102		} else {						\
103			sf = flags_to_string(flags, "none");		\
104			printf(", modified to \"%s\")\n", sf);		\
105			free(sf);					\
106		}							\
107	}
108
109/* SETFLAGS:
110 * given pflags, additionally set those flags specified in s->st_flags and
111 * selected by mask (the other flags are left unchanged).
112 */
113#define SETFLAGS(pflags, mask)						\
114do {									\
115	flags = (s->st_flags & (mask)) | (pflags);			\
116	CHANGEFLAGS;							\
117} while (0)
118
119/* CLEARFLAGS:
120 * given pflags, reset the flags specified in s->st_flags and selected by mask
121 * (the other flags are left unchanged).
122 */
123#define CLEARFLAGS(pflags, mask)					\
124do {									\
125	flags = (~(s->st_flags & (mask)) & CH_MASK) & (pflags);		\
126	CHANGEFLAGS;							\
127} while (0)
128#endif	/* HAVE_STRUCT_STAT_ST_FLAGS */
129
130int
131compare(NODE *s, FTSENT *p)
132{
133	u_int32_t len, val, flags;
134	int fd, label;
135	const char *cp, *tab;
136#if !defined(NO_MD5) || !defined(NO_RMD160) || !defined(NO_SHA1) || !defined(NO_SHA2)
137	char *digestbuf;
138#endif
139
140	tab = NULL;
141	label = 0;
142	switch(s->type) {
143	case F_BLOCK:
144		if (!S_ISBLK(p->fts_statp->st_mode))
145			goto typeerr;
146		break;
147	case F_CHAR:
148		if (!S_ISCHR(p->fts_statp->st_mode))
149			goto typeerr;
150		break;
151	case F_DIR:
152		if (!S_ISDIR(p->fts_statp->st_mode))
153			goto typeerr;
154		break;
155	case F_FIFO:
156		if (!S_ISFIFO(p->fts_statp->st_mode))
157			goto typeerr;
158		break;
159	case F_FILE:
160		if (!S_ISREG(p->fts_statp->st_mode))
161			goto typeerr;
162		break;
163	case F_LINK:
164		if (!S_ISLNK(p->fts_statp->st_mode))
165			goto typeerr;
166		break;
167#ifdef S_ISSOCK
168	case F_SOCK:
169		if (!S_ISSOCK(p->fts_statp->st_mode))
170			goto typeerr;
171		break;
172#endif
173typeerr:		LABEL;
174		printf("\ttype (%s, %s)\n",
175		    nodetype(s->type), inotype(p->fts_statp->st_mode));
176		return (label);
177	}
178	if (mtree_Wflag)
179		goto afterpermwhack;
180#if HAVE_STRUCT_STAT_ST_FLAGS
181	if (iflag && !uflag) {
182		if (s->flags & F_FLAGS)
183		    SETFLAGS(p->fts_statp->st_flags, SP_FLGS);
184		return (label);
185        }
186	if (mflag && !uflag) {
187		if (s->flags & F_FLAGS)
188		    CLEARFLAGS(p->fts_statp->st_flags, SP_FLGS);
189		return (label);
190        }
191#endif
192	if (s->flags & F_DEV &&
193	    (s->type == F_BLOCK || s->type == F_CHAR) &&
194	    s->st_rdev != p->fts_statp->st_rdev) {
195		LABEL;
196		printf("%sdevice (%#jx, %#jx",
197		    tab, (uintmax_t)s->st_rdev,
198		    (uintmax_t)p->fts_statp->st_rdev);
199		if (uflag) {
200			if ((unlink(p->fts_accpath) == -1) ||
201			    (mknod(p->fts_accpath,
202			      s->st_mode | nodetoino(s->type),
203			      s->st_rdev) == -1) ||
204			    (lchown(p->fts_accpath, p->fts_statp->st_uid,
205			      p->fts_statp->st_gid) == -1) )
206				printf(", not modified: %s)\n",
207				    strerror(errno));
208			 else
209				printf(", modified)\n");
210		} else
211			printf(")\n");
212		tab = "\t";
213	}
214	/* Set the uid/gid first, then set the mode. */
215	if (s->flags & (F_UID | F_UNAME) && s->st_uid != p->fts_statp->st_uid) {
216		LABEL;
217		printf("%suser (%lu, %lu",
218		    tab, (u_long)s->st_uid, (u_long)p->fts_statp->st_uid);
219		if (uflag) {
220			if (lchown(p->fts_accpath, s->st_uid, -1))
221				printf(", not modified: %s)\n",
222				    strerror(errno));
223			else
224				printf(", modified)\n");
225		} else
226			printf(")\n");
227		tab = "\t";
228	}
229	if (s->flags & (F_GID | F_GNAME) && s->st_gid != p->fts_statp->st_gid) {
230		LABEL;
231		printf("%sgid (%lu, %lu",
232		    tab, (u_long)s->st_gid, (u_long)p->fts_statp->st_gid);
233		if (uflag) {
234			if (lchown(p->fts_accpath, -1, s->st_gid))
235				printf(", not modified: %s)\n",
236				    strerror(errno));
237			else
238				printf(", modified)\n");
239		}
240		else
241			printf(")\n");
242		tab = "\t";
243	}
244	if (s->flags & F_MODE &&
245	    s->st_mode != (p->fts_statp->st_mode & MBITS)) {
246		if (lflag) {
247			mode_t tmode, mode;
248
249			tmode = s->st_mode;
250			mode = p->fts_statp->st_mode & MBITS;
251			/*
252			 * if none of the suid/sgid/etc bits are set,
253			 * then if the mode is a subset of the target,
254			 * skip.
255			 */
256			if (!((tmode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) ||
257			    (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO))))
258				if ((mode | tmode) == tmode)
259					goto skip;
260		}
261
262		LABEL;
263		printf("%spermissions (%#lo, %#lo",
264		    tab, (u_long)s->st_mode,
265		    (u_long)p->fts_statp->st_mode & MBITS);
266		if (uflag) {
267			if (lchmod(p->fts_accpath, s->st_mode))
268				printf(", not modified: %s)\n",
269				    strerror(errno));
270			else
271				printf(", modified)\n");
272		}
273		else
274			printf(")\n");
275		tab = "\t";
276	skip:	;
277	}
278	if (s->flags & F_NLINK && s->type != F_DIR &&
279	    s->st_nlink != p->fts_statp->st_nlink) {
280		LABEL;
281		printf("%slink count (%lu, %lu)\n",
282		    tab, (u_long)s->st_nlink, (u_long)p->fts_statp->st_nlink);
283		tab = "\t";
284	}
285	if (s->flags & F_SIZE && s->st_size != p->fts_statp->st_size) {
286		LABEL;
287		printf("%ssize (%ju, %ju)\n",
288		    tab, (uintmax_t)s->st_size,
289		    (uintmax_t)p->fts_statp->st_size);
290		tab = "\t";
291	}
292	/*
293	 * XXX
294	 * Since utimes(2) only takes a timeval, there's no point in
295	 * comparing the low bits of the timespec nanosecond field.  This
296	 * will only result in mismatches that we can never fix.
297	 *
298	 * Doesn't display microsecond differences.
299	 */
300	if (s->flags & F_TIME) {
301		struct timeval tv[2];
302		struct stat *ps = p->fts_statp;
303		time_t smtime = s->st_mtimespec.tv_sec;
304
305#if defined(BSD4_4) && !defined(HAVE_NBTOOL_CONFIG_H)
306		time_t pmtime = ps->st_mtimespec.tv_sec;
307
308		TIMESPEC_TO_TIMEVAL(&tv[0], &s->st_mtimespec);
309		TIMESPEC_TO_TIMEVAL(&tv[1], &ps->st_mtimespec);
310#else
311		time_t pmtime = (time_t)ps->st_mtime;
312
313		tv[0].tv_sec = smtime;
314		tv[0].tv_usec = 0;
315		tv[1].tv_sec = pmtime;
316		tv[1].tv_usec = 0;
317#endif
318
319		if (tv[0].tv_sec != tv[1].tv_sec ||
320		    tv[0].tv_usec != tv[1].tv_usec) {
321			LABEL;
322			printf("%smodification time (%.24s, ",
323			    tab, ctime(&smtime));
324			printf("%.24s", ctime(&pmtime));
325			if (tflag) {
326				tv[1] = tv[0];
327				if (utimes(p->fts_accpath, tv))
328					printf(", not modified: %s)\n",
329					    strerror(errno));
330				else
331					printf(", modified)\n");
332			} else
333				printf(")\n");
334			tab = "\t";
335		}
336	}
337#if HAVE_STRUCT_STAT_ST_FLAGS
338	/*
339	 * XXX
340	 * since lchflags(2) will reset file times, the utimes() above
341	 * may have been useless!  oh well, we'd rather have correct
342	 * flags, rather than times?
343	 */
344        if ((s->flags & F_FLAGS) && ((s->st_flags != p->fts_statp->st_flags)
345	    || mflag || iflag)) {
346		if (s->st_flags != p->fts_statp->st_flags) {
347			char *f_s;
348			LABEL;
349			f_s = flags_to_string(s->st_flags, "none");
350			printf("%sflags (\"%s\" is not ", tab, f_s);
351			free(f_s);
352			f_s = flags_to_string(p->fts_statp->st_flags, "none");
353			printf("\"%s\"", f_s);
354			free(f_s);
355		}
356		if (uflag) {
357			if (iflag)
358				SETFLAGS(0, CH_MASK);
359			else if (mflag)
360				CLEARFLAGS(0, SP_FLGS);
361			else
362				SETFLAGS(0, (~SP_FLGS & CH_MASK));
363		} else
364			printf(")\n");
365		tab = "\t";
366	}
367#endif	/* HAVE_STRUCT_STAT_ST_FLAGS */
368
369	/*
370	 * from this point, no more permission checking or whacking
371	 * occurs, only checking of stuff like checksums and symlinks.
372	 */
373 afterpermwhack:
374	if (s->flags & F_CKSUM) {
375		if ((fd = open(p->fts_accpath, O_RDONLY, 0)) < 0) {
376			LABEL;
377			printf("%scksum: %s: %s\n",
378			    tab, p->fts_accpath, strerror(errno));
379			tab = "\t";
380		} else if (crc(fd, &val, &len)) {
381			close(fd);
382			LABEL;
383			printf("%scksum: %s: %s\n",
384			    tab, p->fts_accpath, strerror(errno));
385			tab = "\t";
386		} else {
387			close(fd);
388			if (s->cksum != val) {
389				LABEL;
390				printf("%scksum (%lu, %lu)\n",
391				    tab, s->cksum, (unsigned long)val);
392			}
393			tab = "\t";
394		}
395	}
396#ifndef NO_MD5
397	if (s->flags & F_MD5) {
398		if ((digestbuf = MD5File(p->fts_accpath, NULL)) == NULL) {
399			LABEL;
400			printf("%s%s: %s: %s\n",
401			    tab, MD5KEY, p->fts_accpath, strerror(errno));
402			tab = "\t";
403		} else {
404			if (strcmp(s->md5digest, digestbuf)) {
405				LABEL;
406				printf("%s%s (0x%s, 0x%s)\n",
407				    tab, MD5KEY, s->md5digest, digestbuf);
408			}
409			tab = "\t";
410			free(digestbuf);
411		}
412	}
413#endif	/* ! NO_MD5 */
414#ifndef NO_RMD160
415	if (s->flags & F_RMD160) {
416		if ((digestbuf = RMD160File(p->fts_accpath, NULL)) == NULL) {
417			LABEL;
418			printf("%s%s: %s: %s\n",
419			    tab, RMD160KEY, p->fts_accpath, strerror(errno));
420			tab = "\t";
421		} else {
422			if (strcmp(s->rmd160digest, digestbuf)) {
423				LABEL;
424				printf("%s%s (0x%s, 0x%s)\n",
425				    tab, RMD160KEY, s->rmd160digest, digestbuf);
426			}
427			tab = "\t";
428			free(digestbuf);
429		}
430	}
431#endif	/* ! NO_RMD160 */
432#ifndef NO_SHA1
433	if (s->flags & F_SHA1) {
434		if ((digestbuf = SHA1File(p->fts_accpath, NULL)) == NULL) {
435			LABEL;
436			printf("%s%s: %s: %s\n",
437			    tab, SHA1KEY, p->fts_accpath, strerror(errno));
438			tab = "\t";
439		} else {
440			if (strcmp(s->sha1digest, digestbuf)) {
441				LABEL;
442				printf("%s%s (0x%s, 0x%s)\n",
443				    tab, SHA1KEY, s->sha1digest, digestbuf);
444			}
445			tab = "\t";
446			free(digestbuf);
447		}
448	}
449#endif	/* ! NO_SHA1 */
450#ifndef NO_SHA2
451	if (s->flags & F_SHA256) {
452		if ((digestbuf = SHA256_File(p->fts_accpath, NULL)) == NULL) {
453			LABEL;
454			printf("%s%s: %s: %s\n",
455			    tab, SHA256KEY, p->fts_accpath, strerror(errno));
456			tab = "\t";
457		} else {
458			if (strcmp(s->sha256digest, digestbuf)) {
459				LABEL;
460				printf("%s%s (0x%s, 0x%s)\n",
461				    tab, SHA256KEY, s->sha256digest, digestbuf);
462			}
463			tab = "\t";
464			free(digestbuf);
465		}
466	}
467#ifdef SHA384_BLOCK_LENGTH
468	if (s->flags & F_SHA384) {
469		if ((digestbuf = SHA384_File(p->fts_accpath, NULL)) == NULL) {
470			LABEL;
471			printf("%s%s: %s: %s\n",
472			    tab, SHA384KEY, p->fts_accpath, strerror(errno));
473			tab = "\t";
474		} else {
475			if (strcmp(s->sha384digest, digestbuf)) {
476				LABEL;
477				printf("%s%s (0x%s, 0x%s)\n",
478				    tab, SHA384KEY, s->sha384digest, digestbuf);
479			}
480			tab = "\t";
481			free(digestbuf);
482		}
483	}
484#endif
485	if (s->flags & F_SHA512) {
486		if ((digestbuf = SHA512_File(p->fts_accpath, NULL)) == NULL) {
487			LABEL;
488			printf("%s%s: %s: %s\n",
489			    tab, SHA512KEY, p->fts_accpath, strerror(errno));
490			tab = "\t";
491		} else {
492			if (strcmp(s->sha512digest, digestbuf)) {
493				LABEL;
494				printf("%s%s (0x%s, 0x%s)\n",
495				    tab, SHA512KEY, s->sha512digest, digestbuf);
496			}
497			tab = "\t";
498			free(digestbuf);
499		}
500	}
501#endif	/* ! NO_SHA2 */
502	if (s->flags & F_SLINK &&
503	    strcmp(cp = rlink(p->fts_accpath), s->slink)) {
504		LABEL;
505		printf("%slink ref (%s, %s", tab, cp, s->slink);
506		if (uflag) {
507			if ((unlink(p->fts_accpath) == -1) ||
508			    (symlink(s->slink, p->fts_accpath) == -1) )
509				printf(", not modified: %s)\n",
510				    strerror(errno));
511			else
512				printf(", modified)\n");
513		} else
514			printf(")\n");
515	}
516	return (label);
517}
518
519const char *
520rlink(const char *name)
521{
522	static char lbuf[MAXPATHLEN];
523	int len;
524
525	if ((len = readlink(name, lbuf, sizeof(lbuf) - 1)) == -1)
526		mtree_err("%s: %s", name, strerror(errno));
527	lbuf[len] = '\0';
528	return (lbuf);
529}
530