xref: /freebsd/contrib/mtree/create.c (revision fcb560670601b2a4d87bb31d7531c8dcc37ee71b) 
1 /*	$NetBSD: create.c,v 1.73 2014/04/24 17:22:41 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[] = "@(#)create.c	8.1 (Berkeley) 6/6/93";
40 #else
41 __RCSID("$NetBSD: create.c,v 1.73 2014/04/24 17:22:41 christos Exp $");
42 #endif
43 #endif /* not lint */
44 
45 #include <sys/param.h>
46 #include <sys/stat.h>
47 
48 #if ! HAVE_NBTOOL_CONFIG_H
49 #include <dirent.h>
50 #endif
51 
52 #include <errno.h>
53 #include <fcntl.h>
54 #include <grp.h>
55 #include <pwd.h>
56 #include <stdio.h>
57 #include <stdarg.h>
58 #include <stdint.h>
59 #include <stdlib.h>
60 #include <string.h>
61 #include <time.h>
62 #include <unistd.h>
63 
64 #ifndef NO_MD5
65 #include <md5.h>
66 #endif
67 #ifndef NO_RMD160
68 #include <rmd160.h>
69 #endif
70 #ifndef NO_SHA1
71 #include <sha1.h>
72 #endif
73 #ifndef NO_SHA2
74 #include <sha2.h>
75 #endif
76 
77 #include "extern.h"
78 
79 #define	INDENTNAMELEN	15
80 #define	MAXLINELEN	80
81 
82 static gid_t gid;
83 static uid_t uid;
84 static mode_t mode;
85 static u_long flags;
86 
87 #ifdef __FreeBSD__
88 #define	FTS_CONST const
89 #else
90 #define	FTS_CONST
91 #endif
92 
93 static int	dcmp(const FTSENT *FTS_CONST *, const FTSENT *FTS_CONST *);
94 static void	output(FILE *, int, int *, const char *, ...)
95     __printflike(4, 5);
96 static int	statd(FILE *, FTS *, FTSENT *, uid_t *, gid_t *, mode_t *,
97     u_long *);
98 static void	statf(FILE *, int, FTSENT *);
99 
100 void
101 cwalk(FILE *fp)
102 {
103 	FTS *t;
104 	FTSENT *p;
105 	time_t clocktime;
106 	char host[MAXHOSTNAMELEN + 1];
107 	const char *user;
108 	char *argv[2];
109 	char  dot[] = ".";
110 	int indent = 0;
111 
112 	argv[0] = dot;
113 	argv[1] = NULL;
114 
115 	time(&clocktime);
116 	gethostname(host, sizeof(host));
117 	host[sizeof(host) - 1] = '\0';
118 	if ((user = getlogin()) == NULL) {
119 		struct passwd *pw;
120 		user = (pw = getpwuid(getuid())) == NULL ? pw->pw_name :
121 		    "<unknown>";
122 	}
123 
124 	if (!nflag)
125 		fprintf(fp,
126 	    	    "#\t   user: %s\n#\tmachine: %s\n#\t   tree: %s\n"
127 		    "#\t   date: %s",
128 		    user, host, fullpath, ctime(&clocktime));
129 
130 	if ((t = fts_open(argv, ftsoptions, dcmp)) == NULL)
131 		mtree_err("fts_open: %s", strerror(errno));
132 	while ((p = fts_read(t)) != NULL) {
133 		if (jflag)
134 			indent = p->fts_level * 4;
135 		if (check_excludes(p->fts_name, p->fts_path)) {
136 			fts_set(t, p, FTS_SKIP);
137 			continue;
138 		}
139 		if (!find_only(p->fts_path)) {
140 			fts_set(t, p, FTS_SKIP);
141 			continue;
142 		}
143 		switch(p->fts_info) {
144 		case FTS_D:
145 			if (!bflag)
146 				fprintf(fp, "\n");
147 			if (!nflag)
148 				fprintf(fp, "# %s\n", p->fts_path);
149 			statd(fp, t, p, &uid, &gid, &mode, &flags);
150 			statf(fp, indent, p);
151 			break;
152 		case FTS_DP:
153 			if (p->fts_level > 0)
154 				if (!nflag)
155 					fprintf(fp, "%*s# %s\n", indent, "",
156 					    p->fts_path);
157 			if (p->fts_level > 0 || flavor == F_FREEBSD9) {
158 				fprintf(fp, "%*s..\n", indent, "");
159 				if (!bflag)
160 					fprintf(fp, "\n");
161 			}
162 			break;
163 		case FTS_DNR:
164 		case FTS_ERR:
165 		case FTS_NS:
166 			mtree_err("%s: %s",
167 			    p->fts_path, strerror(p->fts_errno));
168 			break;
169 		default:
170 			if (!dflag)
171 				statf(fp, indent, p);
172 			break;
173 
174 		}
175 	}
176 	fts_close(t);
177 	if (sflag && keys & F_CKSUM)
178 		mtree_err("%s checksum: %u", fullpath, crc_total);
179 }
180 
181 static void
182 statf(FILE *fp, int indent, FTSENT *p)
183 {
184 	u_int32_t len, val;
185 	int fd, offset;
186 	const char *name = NULL;
187 #if !defined(NO_MD5) || !defined(NO_RMD160) || !defined(NO_SHA1) || !defined(NO_SHA2)
188 	char *digestbuf;
189 #endif
190 
191 	offset = fprintf(fp, "%*s%s%s", indent, "",
192 	    S_ISDIR(p->fts_statp->st_mode) ? "" : "    ", vispath(p->fts_name));
193 
194 	if (offset > (INDENTNAMELEN + indent))
195 		offset = MAXLINELEN;
196 	else
197 		offset += fprintf(fp, "%*s",
198 		    (INDENTNAMELEN + indent) - offset, "");
199 
200 	if (!S_ISREG(p->fts_statp->st_mode) && (flavor == F_NETBSD6 || !dflag))
201 		output(fp, indent, &offset, "type=%s",
202 		    inotype(p->fts_statp->st_mode));
203 	if (keys & (F_UID | F_UNAME) && p->fts_statp->st_uid != uid) {
204 		if (keys & F_UNAME &&
205 		    (name = user_from_uid(p->fts_statp->st_uid, 1)) != NULL)
206 			output(fp, indent, &offset, "uname=%s", name);
207 		if (keys & F_UID || (keys & F_UNAME && name == NULL))
208 			output(fp, indent, &offset, "uid=%u",
209 			    p->fts_statp->st_uid);
210 	}
211 	if (keys & (F_GID | F_GNAME) && p->fts_statp->st_gid != gid) {
212 		if (keys & F_GNAME &&
213 		    (name = group_from_gid(p->fts_statp->st_gid, 1)) != NULL)
214 			output(fp, indent, &offset, "gname=%s", name);
215 		if (keys & F_GID || (keys & F_GNAME && name == NULL))
216 			output(fp, indent, &offset, "gid=%u",
217 			    p->fts_statp->st_gid);
218 	}
219 	if (keys & F_MODE && (p->fts_statp->st_mode & MBITS) != mode)
220 		output(fp, indent, &offset, "mode=%#o",
221 		    p->fts_statp->st_mode & MBITS);
222 	if (keys & F_DEV &&
223 	    (S_ISBLK(p->fts_statp->st_mode) || S_ISCHR(p->fts_statp->st_mode)))
224 		output(fp, indent, &offset, "device=%#jx",
225 		    (uintmax_t)p->fts_statp->st_rdev);
226 	if (keys & F_NLINK && p->fts_statp->st_nlink != 1)
227 		output(fp, indent, &offset, "nlink=%u", p->fts_statp->st_nlink);
228 	if (keys & F_SIZE &&
229 	    (flavor == F_FREEBSD9 || S_ISREG(p->fts_statp->st_mode)))
230 		output(fp, indent, &offset, "size=%ju",
231 		    (uintmax_t)p->fts_statp->st_size);
232 	if (keys & F_TIME)
233 #if defined(BSD4_4) && !defined(HAVE_NBTOOL_CONFIG_H)
234 		output(fp, indent, &offset, "time=%jd.%09ld",
235 		    (intmax_t)p->fts_statp->st_mtimespec.tv_sec,
236 		    p->fts_statp->st_mtimespec.tv_nsec);
237 #else
238 		output(fp, indent, &offset, "time=%jd.%09ld",
239 		    (intmax_t)p->fts_statp->st_mtime, (long)0);
240 #endif
241 	if (keys & F_CKSUM && S_ISREG(p->fts_statp->st_mode)) {
242 		if ((fd = open(p->fts_accpath, O_RDONLY, 0)) < 0 ||
243 		    crc(fd, &val, &len))
244 			mtree_err("%s: %s", p->fts_accpath, strerror(errno));
245 		close(fd);
246 		output(fp, indent, &offset, "cksum=%lu", (long)val);
247 	}
248 #ifndef NO_MD5
249 	if (keys & F_MD5 && S_ISREG(p->fts_statp->st_mode)) {
250 		if ((digestbuf = MD5File(p->fts_accpath, NULL)) == NULL)
251 			mtree_err("%s: MD5File failed: %s", p->fts_accpath,
252 			    strerror(errno));
253 		output(fp, indent, &offset, "%s=%s", MD5KEY, digestbuf);
254 		free(digestbuf);
255 	}
256 #endif	/* ! NO_MD5 */
257 #ifndef NO_RMD160
258 	if (keys & F_RMD160 && S_ISREG(p->fts_statp->st_mode)) {
259 		if ((digestbuf = RMD160File(p->fts_accpath, NULL)) == NULL)
260 			mtree_err("%s: RMD160File failed: %s", p->fts_accpath,
261 			    strerror(errno));
262 		output(fp, indent, &offset, "%s=%s", RMD160KEY, digestbuf);
263 		free(digestbuf);
264 	}
265 #endif	/* ! NO_RMD160 */
266 #ifndef NO_SHA1
267 	if (keys & F_SHA1 && S_ISREG(p->fts_statp->st_mode)) {
268 		if ((digestbuf = SHA1File(p->fts_accpath, NULL)) == NULL)
269 			mtree_err("%s: SHA1File failed: %s", p->fts_accpath,
270 			    strerror(errno));
271 		output(fp, indent, &offset, "%s=%s", SHA1KEY, digestbuf);
272 		free(digestbuf);
273 	}
274 #endif	/* ! NO_SHA1 */
275 #ifndef NO_SHA2
276 	if (keys & F_SHA256 && S_ISREG(p->fts_statp->st_mode)) {
277 		if ((digestbuf = SHA256_File(p->fts_accpath, NULL)) == NULL)
278 			mtree_err("%s: SHA256_File failed: %s", p->fts_accpath,
279 			    strerror(errno));
280 		output(fp, indent, &offset, "%s=%s", SHA256KEY, digestbuf);
281 		free(digestbuf);
282 	}
283 #ifdef SHA384_BLOCK_LENGTH
284 	if (keys & F_SHA384 && S_ISREG(p->fts_statp->st_mode)) {
285 		if ((digestbuf = SHA384_File(p->fts_accpath, NULL)) == NULL)
286 			mtree_err("%s: SHA384_File failed: %s", p->fts_accpath,
287 			    strerror(errno));
288 		output(fp, indent, &offset, "%s=%s", SHA384KEY, digestbuf);
289 		free(digestbuf);
290 	}
291 #endif
292 	if (keys & F_SHA512 && S_ISREG(p->fts_statp->st_mode)) {
293 		if ((digestbuf = SHA512_File(p->fts_accpath, NULL)) == NULL)
294 			mtree_err("%s: SHA512_File failed: %s", p->fts_accpath,
295 			    strerror(errno));
296 		output(fp, indent, &offset, "%s=%s", SHA512KEY, digestbuf);
297 		free(digestbuf);
298 	}
299 #endif	/* ! NO_SHA2 */
300 	if (keys & F_SLINK &&
301 	    (p->fts_info == FTS_SL || p->fts_info == FTS_SLNONE))
302 		output(fp, indent, &offset, "link=%s",
303 		    vispath(rlink(p->fts_accpath)));
304 #if HAVE_STRUCT_STAT_ST_FLAGS
305 	if (keys & F_FLAGS && p->fts_statp->st_flags != flags) {
306 		char *str = flags_to_string(p->fts_statp->st_flags, "none");
307 		output(fp, indent, &offset, "flags=%s", str);
308 		free(str);
309 	}
310 #endif
311 	putchar('\n');
312 }
313 
314 /* XXX
315  * FLAGS2INDEX will fail once the user and system settable bits need more
316  * than one byte, respectively.
317  */
318 #define FLAGS2INDEX(x)  (((x >> 8) & 0x0000ff00) | (x & 0x000000ff))
319 
320 #define	MTREE_MAXGID	5000
321 #define	MTREE_MAXUID	5000
322 #define	MTREE_MAXMODE	(MBITS + 1)
323 #if HAVE_STRUCT_STAT_ST_FLAGS
324 #define	MTREE_MAXFLAGS  (FLAGS2INDEX(CH_MASK) + 1)   /* 1808 */
325 #else
326 #define MTREE_MAXFLAGS	1
327 #endif
328 #define	MTREE_MAXS 16
329 
330 static int
331 statd(FILE *fp, FTS *t, FTSENT *parent, uid_t *puid, gid_t *pgid, mode_t *pmode,
332     u_long *pflags)
333 {
334 	FTSENT *p;
335 	gid_t sgid;
336 	uid_t suid;
337 	mode_t smode;
338 	u_long sflags = 0;
339 	const char *name = NULL;
340 	gid_t savegid;
341 	uid_t saveuid;
342 	mode_t savemode;
343 	u_long saveflags;
344 	u_short maxgid, maxuid, maxmode, maxflags;
345 	u_short g[MTREE_MAXGID], u[MTREE_MAXUID],
346 		m[MTREE_MAXMODE], f[MTREE_MAXFLAGS];
347 	static int first = 1;
348 
349 	savegid = *pgid;
350 	saveuid = *puid;
351 	savemode = *pmode;
352 	saveflags = *pflags;
353 	if ((p = fts_children(t, 0)) == NULL) {
354 		if (errno)
355 			mtree_err("%s: %s", RP(parent), strerror(errno));
356 		return (1);
357 	}
358 
359 	memset(g, 0, sizeof(g));
360 	memset(u, 0, sizeof(u));
361 	memset(m, 0, sizeof(m));
362 	memset(f, 0, sizeof(f));
363 
364 	maxuid = maxgid = maxmode = maxflags = 0;
365 	for (; p; p = p->fts_link) {
366 		if (flavor == F_NETBSD6 || !dflag ||
367 		    (dflag && S_ISDIR(p->fts_statp->st_mode))) {
368 			smode = p->fts_statp->st_mode & MBITS;
369 			if (smode < MTREE_MAXMODE && ++m[smode] > maxmode) {
370 				savemode = smode;
371 				maxmode = m[smode];
372 			}
373 			sgid = p->fts_statp->st_gid;
374 			if (sgid < MTREE_MAXGID && ++g[sgid] > maxgid) {
375 				savegid = sgid;
376 				maxgid = g[sgid];
377 			}
378 			suid = p->fts_statp->st_uid;
379 			if (suid < MTREE_MAXUID && ++u[suid] > maxuid) {
380 				saveuid = suid;
381 				maxuid = u[suid];
382 			}
383 
384 #if HAVE_STRUCT_STAT_ST_FLAGS
385 			sflags = FLAGS2INDEX(p->fts_statp->st_flags);
386 			if (sflags < MTREE_MAXFLAGS && ++f[sflags] > maxflags) {
387 				saveflags = p->fts_statp->st_flags;
388 				maxflags = f[sflags];
389 			}
390 #endif
391 		}
392 	}
393 	/*
394 	 * If the /set record is the same as the last one we do not need to
395 	 * output a new one.  So first we check to see if anything changed.
396 	 * Note that we always output a /set record for the first directory.
397 	 */
398 	if (((keys & (F_UNAME | F_UID)) && (*puid != saveuid)) ||
399 	    ((keys & (F_GNAME | F_GID)) && (*pgid != savegid)) ||
400 	    ((keys & F_MODE) && (*pmode != savemode)) ||
401 	    ((keys & F_FLAGS) && (*pflags != saveflags)) ||
402 	    first) {
403 		first = 0;
404 		if (flavor != F_NETBSD6 && dflag)
405 			fprintf(fp, "/set type=dir");
406 		else
407 			fprintf(fp, "/set type=file");
408 		if (keys & (F_UID | F_UNAME)) {
409 			if (keys & F_UNAME &&
410 			    (name = user_from_uid(saveuid, 1)) != NULL)
411 				fprintf(fp, " uname=%s", name);
412 			if (keys & F_UID || (keys & F_UNAME && name == NULL))
413 				fprintf(fp, " uid=%lu", (u_long)saveuid);
414 		}
415 		if (keys & (F_GID | F_GNAME)) {
416 			if (keys & F_GNAME &&
417 			    (name = group_from_gid(savegid, 1)) != NULL)
418 				fprintf(fp, " gname=%s", name);
419 			if (keys & F_GID || (keys & F_GNAME && name == NULL))
420 				fprintf(fp, " gid=%lu", (u_long)savegid);
421 		}
422 		if (keys & F_MODE)
423 			fprintf(fp, " mode=%#lo", (u_long)savemode);
424 		if (keys & F_NLINK)
425 			fprintf(fp, " nlink=1");
426 		if (keys & F_FLAGS) {
427 			char *str = flags_to_string(saveflags, "none");
428 			fprintf(fp, " flags=%s", str);
429 			free(str);
430 		}
431 		fprintf(fp, "\n");
432 		*puid = saveuid;
433 		*pgid = savegid;
434 		*pmode = savemode;
435 		*pflags = saveflags;
436 	}
437 	return (0);
438 }
439 
440 /*
441  * dcmp --
442  *	used as a comparison function passed to fts_open() to control
443  *	the order in which fts_read() returns results.	We make
444  *	directories sort after non-directories, but otherwise sort in
445  *	strcmp() order.
446  *
447  * Keep this in sync with nodecmp() in spec.c.
448  */
449 static int
450 dcmp(const FTSENT *FTS_CONST *a, const FTSENT *FTS_CONST *b)
451 {
452 
453 	if (S_ISDIR((*a)->fts_statp->st_mode)) {
454 		if (!S_ISDIR((*b)->fts_statp->st_mode))
455 			return (1);
456 	} else if (S_ISDIR((*b)->fts_statp->st_mode))
457 		return (-1);
458 	return (strcmp((*a)->fts_name, (*b)->fts_name));
459 }
460 
461 void
462 output(FILE *fp, int indent, int *offset, const char *fmt, ...)
463 {
464 	va_list ap;
465 	char buf[1024];
466 
467 	va_start(ap, fmt);
468 	vsnprintf(buf, sizeof(buf), fmt, ap);
469 	va_end(ap);
470 
471 	if (*offset + strlen(buf) > MAXLINELEN - 3) {
472 		fprintf(fp, " \\\n%*s", INDENTNAMELEN + indent, "");
473 		*offset = INDENTNAMELEN + indent;
474 	}
475 	*offset += fprintf(fp, " %s", buf) + 1;
476 }
477