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1 /*
2  * Copyright (c) 2012, 2013 SRI International
3  * Copyright (c) 1987, 1993
4  *      The Regents of the University of California.  All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 4. Neither the name of the University nor the names of its contributors
15  *    may be used to endorse or promote products derived from this software
16  *    without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  */
30
31 #ifndef lint
32 static const char copyright[] =
33 "@(#) Copyright (c) 1987, 1993\n\
34         The Regents of the University of California.  All rights reserved.\n";
35 #endif /* not lint */
36
37 #if 0
38 #ifndef lint
39 static char sccsid[] = "@(#)xinstall.c  8.1 (Berkeley) 7/21/93";
40 #endif /* not lint */
41 #endif
42
43 #include <sys/cdefs.h>
44 __FBSDID("$FreeBSD$");
45
46 #include <sys/param.h>
47 #include <sys/mman.h>
48 #include <sys/mount.h>
49 #include <sys/stat.h>
50 #include <sys/time.h>
51 #include <sys/wait.h>
52
53 #include <err.h>
54 #include <errno.h>
55 #include <fcntl.h>
56 #include <grp.h>
57 #include <libgen.h>
58 #include <md5.h>
59 #include <paths.h>
60 #include <pwd.h>
61 #include <ripemd.h>
62 #include <sha.h>
63 #include <sha256.h>
64 #include <sha512.h>
65 #include <stdint.h>
66 #include <stdio.h>
67 #include <stdlib.h>
68 #include <string.h>
69 #include <sysexits.h>
70 #include <unistd.h>
71 #include <vis.h>
72
73 #include "mtree.h"
74
75 /* Bootstrap aid - this doesn't exist in most older releases */
76 #ifndef MAP_FAILED
77 #define MAP_FAILED ((void *)-1) /* from <sys/mman.h> */
78 #endif
79
80 #define MAX_CMP_SIZE    (16 * 1024 * 1024)
81
82 #define LN_ABSOLUTE     0x01
83 #define LN_RELATIVE     0x02
84 #define LN_HARD         0x04
85 #define LN_SYMBOLIC     0x08
86 #define LN_MIXED        0x10
87
88 #define DIRECTORY       0x01            /* Tell install it's a directory. */
89 #define SETFLAGS        0x02            /* Tell install to set flags. */
90 #define NOCHANGEBITS    (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND)
91 #define BACKUP_SUFFIX   ".old"
92
93 typedef union {
94         MD5_CTX         MD5;
95         RIPEMD160_CTX   RIPEMD160;
96         SHA1_CTX        SHA1;
97         SHA256_CTX      SHA256;
98         SHA512_CTX      SHA512;
99 }       DIGEST_CTX;
100
101 static enum {
102         DIGEST_NONE = 0,
103         DIGEST_MD5,
104         DIGEST_RIPEMD160,
105         DIGEST_SHA1,
106         DIGEST_SHA256,
107         DIGEST_SHA512,
108 } digesttype = DIGEST_NONE;
109
110 static gid_t gid;
111 static uid_t uid;
112 static int dobackup, docompare, dodir, dolink, dopreserve, dostrip, dounpriv,
113     safecopy, verbose;
114 static int haveopt_f, haveopt_g, haveopt_m, haveopt_o;
115 static mode_t mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
116 static FILE *metafp;
117 static const char *group, *owner;
118 static const char *suffix = BACKUP_SUFFIX;
119 static char *destdir, *digest, *fflags, *metafile, *tags;
120
121 static int      compare(int, const char *, size_t, int, const char *, size_t,
122                     char **);
123 static char     *copy(int, const char *, int, const char *, off_t);
124 static int      create_newfile(const char *, int, struct stat *);
125 static int      create_tempfile(const char *, char *, size_t);
126 static char     *quiet_mktemp(char *template);
127 static char     *digest_file(const char *);
128 static void     digest_init(DIGEST_CTX *);
129 static void     digest_update(DIGEST_CTX *, const unsigned char *, size_t);
130 static char     *digest_end(DIGEST_CTX *, char *);
131 static int      do_link(const char *, const char *, const struct stat *);
132 static void     do_symlink(const char *, const char *, const struct stat *);
133 static void     makelink(const char *, const char *, const struct stat *);
134 static void     install(const char *, const char *, u_long, u_int);
135 static void     install_dir(char *);
136 static void     metadata_log(const char *, const char *, struct timeval *,
137                     const char *, const char *, off_t);
138 static int      parseid(const char *, id_t *);
139 static void     strip(const char *);
140 static int      trymmap(int);
141 static void     usage(void);
142
143 int
144 main(int argc, char *argv[])
145 {
146         struct stat from_sb, to_sb;
147         mode_t *set;
148         u_long fset;
149         int ch, no_target;
150         u_int iflags;
151         char *p;
152         const char *to_name;
153
154         iflags = 0;
155         group = owner = NULL;
156         while ((ch = getopt(argc, argv, "B:bCcD:df:g:h:l:M:m:N:o:pSsT:Uv")) !=
157              -1)
158                 switch((char)ch) {
159                 case 'B':
160                         suffix = optarg;
161                         /* FALLTHROUGH */
162                 case 'b':
163                         dobackup = 1;
164                         break;
165                 case 'C':
166                         docompare = 1;
167                         break;
168                 case 'c':
169                         /* For backwards compatibility. */
170                         break;
171                 case 'D':
172                         destdir = optarg;
173                         break;
174                 case 'd':
175                         dodir = 1;
176                         break;
177                 case 'f':
178                         haveopt_f = 1;
179                         fflags = optarg;
180                         break;
181                 case 'g':
182                         haveopt_g = 1;
183                         group = optarg;
184                         break;
185                 case 'h':
186                         digest = optarg;
187                         break;
188                 case 'l':
189                         for (p = optarg; *p != '\0'; p++)
190                                 switch (*p) {
191                                 case 's':
192                                         dolink &= ~(LN_HARD|LN_MIXED);
193                                         dolink |= LN_SYMBOLIC;
194                                         break;
195                                 case 'h':
196                                         dolink &= ~(LN_SYMBOLIC|LN_MIXED);
197                                         dolink |= LN_HARD;
198                                         break;
199                                 case 'm':
200                                         dolink &= ~(LN_SYMBOLIC|LN_HARD);
201                                         dolink |= LN_MIXED;
202                                         break;
203                                 case 'a':
204                                         dolink &= ~LN_RELATIVE;
205                                         dolink |= LN_ABSOLUTE;
206                                         break;
207                                 case 'r':
208                                         dolink &= ~LN_ABSOLUTE;
209                                         dolink |= LN_RELATIVE;
210                                         break;
211                                 default:
212                                         errx(1, "%c: invalid link type", *p);
213                                         /* NOTREACHED */
214                                 }
215                         break;
216                 case 'M':
217                         metafile = optarg;
218                         break;
219                 case 'm':
220                         haveopt_m = 1;
221                         if (!(set = setmode(optarg)))
222                                 errx(EX_USAGE, "invalid file mode: %s",
223                                      optarg);
224                         mode = getmode(set, 0);
225                         free(set);
226                         break;
227                 case 'N':
228                         if (!setup_getid(optarg))
229                                 err(EX_OSERR, "Unable to use user and group "
230                                     "databases in `%s'", optarg);
231                         break;
232                 case 'o':
233                         haveopt_o = 1;
234                         owner = optarg;
235                         break;
236                 case 'p':
237                         docompare = dopreserve = 1;
238                         break;
239                 case 'S':
240                         safecopy = 1;
241                         break;
242                 case 's':
243                         dostrip = 1;
244                         break;
245                 case 'T':
246                         tags = optarg;
247                         break;
248                 case 'U':
249                         dounpriv = 1;
250                         break;
251                 case 'v':
252                         verbose = 1;
253                         break;
254                 case '?':
255                 default:
256                         usage();
257                 }
258         argc -= optind;
259         argv += optind;
260
261         /* some options make no sense when creating directories */
262         if (dostrip && dodir) {
263                 warnx("-d and -s may not be specified together");
264                 usage();
265         }
266
267         if (getenv("DONTSTRIP") != NULL) {
268                 warnx("DONTSTRIP set - will not strip installed binaries");
269                 dostrip = 0;
270         }
271
272         /* must have at least two arguments, except when creating directories */
273         if (argc == 0 || (argc == 1 && !dodir))
274                 usage();
275
276         if (digest != NULL) {
277                 if (strcmp(digest, "none") == 0) {
278                         digesttype = DIGEST_NONE;
279                 } else if (strcmp(digest, "md5") == 0) {
280                        digesttype = DIGEST_MD5;
281                 } else if (strcmp(digest, "rmd160") == 0) {
282                         digesttype = DIGEST_RIPEMD160;
283                 } else if (strcmp(digest, "sha1") == 0) {
284                         digesttype = DIGEST_SHA1;
285                 } else if (strcmp(digest, "sha256") == 0) {
286                         digesttype = DIGEST_SHA256;
287                 } else if (strcmp(digest, "sha512") == 0) {
288                         digesttype = DIGEST_SHA512;
289                 } else {
290                         warnx("unknown digest `%s'", digest);
291                         usage();
292                 }
293         }
294
295         /* need to make a temp copy so we can compare stripped version */
296         if (docompare && dostrip)
297                 safecopy = 1;
298
299         /* get group and owner id's */
300         if (group != NULL && !dounpriv) {
301                 if (gid_from_group(group, &gid) == -1) {
302                         id_t id;
303                         if (!parseid(group, &id))
304                                 errx(1, "unknown group %s", group);
305                         gid = id;
306                 }
307         } else
308                 gid = (gid_t)-1;
309
310         if (owner != NULL && !dounpriv) {
311                 if (uid_from_user(owner, &uid) == -1) {
312                         id_t id;
313                         if (!parseid(owner, &id))
314                                 errx(1, "unknown user %s", owner);
315                         uid = id;
316                 }
317         } else
318                 uid = (uid_t)-1;
319
320         if (fflags != NULL && !dounpriv) {
321                 if (strtofflags(&fflags, &fset, NULL))
322                         errx(EX_USAGE, "%s: invalid flag", fflags);
323                 iflags |= SETFLAGS;
324         }
325
326         if (metafile != NULL) {
327                 if ((metafp = fopen(metafile, "a")) == NULL)
328                         warn("open %s", metafile);
329         } else
330                 digesttype = DIGEST_NONE;
331
332         if (dodir) {
333                 for (; *argv != NULL; ++argv)
334                         install_dir(*argv);
335                 exit(EX_OK);
336                 /* NOTREACHED */
337         }
338
339         to_name = argv[argc - 1];
340         no_target = stat(to_name, &to_sb);
341         if (!no_target && S_ISDIR(to_sb.st_mode)) {
342                 if (dolink & LN_SYMBOLIC) {
343                         if (lstat(to_name, &to_sb) != 0)
344                                 err(EX_OSERR, "%s vanished", to_name);
345                         if (S_ISLNK(to_sb.st_mode)) {
346                                 if (argc != 2) {
347                                         errno = ENOTDIR;
348                                         err(EX_USAGE, "%s", to_name);
349                                 }
350                                 install(*argv, to_name, fset, iflags);
351                                 exit(EX_OK);
352                         }
353                 }
354                 for (; *argv != to_name; ++argv)
355                         install(*argv, to_name, fset, iflags | DIRECTORY);
356                 exit(EX_OK);
357                 /* NOTREACHED */
358         }
359
360         /* can't do file1 file2 directory/file */
361         if (argc != 2) {
362                 if (no_target)
363                         warnx("target directory `%s' does not exist", 
364                             argv[argc - 1]);
365                 else
366                         warnx("target `%s' is not a directory",
367                             argv[argc - 1]);
368                 usage();
369         }
370
371         if (!no_target && !dolink) {
372                 if (stat(*argv, &from_sb))
373                         err(EX_OSERR, "%s", *argv);
374                 if (!S_ISREG(to_sb.st_mode)) {
375                         errno = EFTYPE;
376                         err(EX_OSERR, "%s", to_name);
377                 }
378                 if (to_sb.st_dev == from_sb.st_dev &&
379                     to_sb.st_ino == from_sb.st_ino)
380                         errx(EX_USAGE, 
381                             "%s and %s are the same file", *argv, to_name);
382         }
383         install(*argv, to_name, fset, iflags);
384         exit(EX_OK);
385         /* NOTREACHED */
386 }
387
388 static char *
389 digest_file(const char *name)
390 {
391
392         switch (digesttype) {
393         case DIGEST_MD5:
394                 return (MD5File(name, NULL));
395         case DIGEST_RIPEMD160:
396                 return (RIPEMD160_File(name, NULL));
397         case DIGEST_SHA1:
398                 return (SHA1_File(name, NULL));
399         case DIGEST_SHA256:
400                 return (SHA256_File(name, NULL));
401         case DIGEST_SHA512:
402                 return (SHA512_File(name, NULL));
403         default:
404                 return (NULL);
405         }
406 }
407
408 static void
409 digest_init(DIGEST_CTX *c)
410 {
411
412         switch (digesttype) {
413         case DIGEST_NONE:
414                 break;
415         case DIGEST_MD5:
416                 MD5Init(&(c->MD5));
417                 break;
418         case DIGEST_RIPEMD160:
419                 RIPEMD160_Init(&(c->RIPEMD160));
420                 break;
421         case DIGEST_SHA1:
422                 SHA1_Init(&(c->SHA1));
423                 break;
424         case DIGEST_SHA256:
425                 SHA256_Init(&(c->SHA256));
426                 break;
427         case DIGEST_SHA512:
428                 SHA512_Init(&(c->SHA512));
429                 break;
430         }
431 }
432
433 static void
434 digest_update(DIGEST_CTX *c, const unsigned char *data, size_t len)
435 {
436
437         switch (digesttype) {
438         case DIGEST_NONE:
439                 break;
440         case DIGEST_MD5:
441                 MD5Update(&(c->MD5), data, len);
442                 break;
443         case DIGEST_RIPEMD160:
444                 RIPEMD160_Update(&(c->RIPEMD160), data, len);
445                 break;
446         case DIGEST_SHA1:
447                 SHA1_Update(&(c->SHA1), data, len);
448                 break;
449         case DIGEST_SHA256:
450                 SHA256_Update(&(c->SHA256), data, len);
451                 break;
452         case DIGEST_SHA512:
453                 SHA512_Update(&(c->SHA512), data, len);
454                 break;
455         }
456 }
457
458 static char *
459 digest_end(DIGEST_CTX *c, char *buf)
460 {
461
462         switch (digesttype) {
463         case DIGEST_MD5:
464                 return (MD5End(&(c->MD5), buf));
465         case DIGEST_RIPEMD160:
466                 return (RIPEMD160_End(&(c->RIPEMD160), buf));
467         case DIGEST_SHA1:
468                 return (SHA1_End(&(c->SHA1), buf));
469         case DIGEST_SHA256:
470                 return (SHA256_End(&(c->SHA256), buf));
471         case DIGEST_SHA512:
472                 return (SHA512_End(&(c->SHA512), buf));
473         default:
474                 return (NULL);
475         }
476 }
477
478 /*
479  * parseid --
480  *      parse uid or gid from arg into id, returning non-zero if successful
481  */
482 static int
483 parseid(const char *name, id_t *id)
484 {
485         char    *ep;
486         errno = 0;
487         *id = (id_t)strtoul(name, &ep, 10);
488         if (errno || *ep != '\0')
489                 return (0);
490         return (1);
491 }
492
493 /*
494  * quiet_mktemp --
495  *      mktemp implementation used mkstemp to avoid mktemp warnings.  We
496  *      really do need mktemp semantics here as we will be creating a link.
497  */
498 static char *
499 quiet_mktemp(char *template)
500 {
501         int fd;
502
503         if ((fd = mkstemp(template)) == -1)
504                 return (NULL);
505         close (fd);
506         if (unlink(template) == -1)
507                 err(EX_OSERR, "unlink %s", template);
508         return (template);
509 }
510
511 /*
512  * do_link --
513  *      make a hard link, obeying dorename if set
514  *      return -1 on failure
515  */
516 static int
517 do_link(const char *from_name, const char *to_name,
518     const struct stat *target_sb)
519 {
520         char tmpl[MAXPATHLEN];
521         int ret;
522
523         if (safecopy && target_sb != NULL) {
524                 (void)snprintf(tmpl, sizeof(tmpl), "%s.inst.XXXXXX", to_name);
525                 /* This usage is safe. */
526                 if (quiet_mktemp(tmpl) == NULL)
527                         err(EX_OSERR, "%s: mktemp", tmpl);
528                 ret = link(from_name, tmpl);
529                 if (ret == 0) {
530                         if (target_sb->st_mode & S_IFDIR && rmdir(to_name) ==
531                             -1) {
532                                 unlink(tmpl);
533                                 err(EX_OSERR, "%s", to_name);
534                         }
535                         if (target_sb->st_flags & NOCHANGEBITS)
536                                 (void)chflags(to_name, target_sb->st_flags &
537                                      ~NOCHANGEBITS);
538                         unlink(to_name);
539                         ret = rename(tmpl, to_name);
540                         /*
541                          * If rename has posix semantics, then the temporary
542                          * file may still exist when from_name and to_name point
543                          * to the same file, so unlink it unconditionally.
544                          */
545                         (void)unlink(tmpl);
546                 }
547                 return (ret);
548         } else
549                 return (link(from_name, to_name));
550 }
551
552 /*
553  * do_symlink --
554  *      Make a symbolic link, obeying dorename if set. Exit on failure.
555  */
556 static void
557 do_symlink(const char *from_name, const char *to_name,
558     const struct stat *target_sb)
559 {
560         char tmpl[MAXPATHLEN];
561
562         if (safecopy && target_sb != NULL) {
563                 (void)snprintf(tmpl, sizeof(tmpl), "%s.inst.XXXXXX", to_name);
564                 /* This usage is safe. */
565                 if (quiet_mktemp(tmpl) == NULL)
566                         err(EX_OSERR, "%s: mktemp", tmpl);
567
568                 if (symlink(from_name, tmpl) == -1)
569                         err(EX_OSERR, "symlink %s -> %s", from_name, tmpl);
570
571                 if (target_sb->st_mode & S_IFDIR && rmdir(to_name) == -1) {
572                         (void)unlink(tmpl);
573                         err(EX_OSERR, "%s", to_name);
574                 }
575                 if (target_sb->st_flags & NOCHANGEBITS)
576                         (void)chflags(to_name, target_sb->st_flags &
577                              ~NOCHANGEBITS);
578                 unlink(to_name);
579
580                 if (rename(tmpl, to_name) == -1) {
581                         /* Remove temporary link before exiting. */
582                         (void)unlink(tmpl);
583                         err(EX_OSERR, "%s: rename", to_name);
584                 }
585         } else {
586                 if (symlink(from_name, to_name) == -1)
587                         err(EX_OSERR, "symlink %s -> %s", from_name, to_name);
588         }
589 }
590
591 /*
592  * makelink --
593  *      make a link from source to destination
594  */
595 static void
596 makelink(const char *from_name, const char *to_name,
597     const struct stat *target_sb)
598 {
599         char    src[MAXPATHLEN], dst[MAXPATHLEN], lnk[MAXPATHLEN];
600         struct stat     to_sb;
601
602         /* Try hard links first. */
603         if (dolink & (LN_HARD|LN_MIXED)) {
604                 if (do_link(from_name, to_name, target_sb) == -1) {
605                         if ((dolink & LN_HARD) || errno != EXDEV)
606                                 err(EX_OSERR, "link %s -> %s", from_name, to_name);
607                 } else {
608                         if (stat(to_name, &to_sb))
609                                 err(EX_OSERR, "%s: stat", to_name);
610                         if (S_ISREG(to_sb.st_mode)) {
611                                 /*
612                                  * XXX: hard links to anything other than
613                                  * plain files are not metalogged
614                                  */
615                                 int omode;
616                                 const char *oowner, *ogroup;
617                                 char *offlags;
618                                 char *dres;
619
620                                 /*
621                                  * XXX: use underlying perms, unless
622                                  * overridden on command line.
623                                  */
624                                 omode = mode;
625                                 if (!haveopt_m)
626                                         mode = (to_sb.st_mode & 0777);
627                                 oowner = owner;
628                                 if (!haveopt_o)
629                                         owner = NULL;
630                                 ogroup = group;
631                                 if (!haveopt_g)
632                                         group = NULL;
633                                 offlags = fflags;
634                                 if (!haveopt_f)
635                                         fflags = NULL;
636                                 dres = digest_file(from_name);
637                                 metadata_log(to_name, "file", NULL, NULL,
638                                     dres, to_sb.st_size);
639                                 free(dres);
640                                 mode = omode;
641                                 owner = oowner;
642                                 group = ogroup;
643                                 fflags = offlags;
644                         }
645                         return;
646                 }
647         }
648
649         /* Symbolic links. */
650         if (dolink & LN_ABSOLUTE) {
651                 /* Convert source path to absolute. */
652                 if (realpath(from_name, src) == NULL)
653                         err(EX_OSERR, "%s: realpath", from_name);
654                 do_symlink(src, to_name, target_sb);
655                 /* XXX: src may point outside of destdir */
656                 metadata_log(to_name, "link", NULL, src, NULL, 0);
657                 return;
658         }
659
660         if (dolink & LN_RELATIVE) {
661                 char *cp, *d, *s;
662
663                 /* Resolve pathnames. */
664                 if (realpath(from_name, src) == NULL)
665                         err(EX_OSERR, "%s: realpath", from_name);
666
667                 /*
668                  * The last component of to_name may be a symlink,
669                  * so use realpath to resolve only the directory.
670                  */
671                 cp = dirname(to_name);
672                 if (realpath(cp, dst) == NULL)
673                         err(EX_OSERR, "%s: realpath", cp);
674                 /* .. and add the last component. */
675                 if (strcmp(dst, "/") != 0) {
676                         if (strlcat(dst, "/", sizeof(dst)) > sizeof(dst))
677                                 errx(1, "resolved pathname too long");
678                 }
679                 cp = basename(to_name);
680                 if (strlcat(dst, cp, sizeof(dst)) > sizeof(dst))
681                         errx(1, "resolved pathname too long");
682
683                 /* Trim common path components. */
684                 for (s = src, d = dst; *s == *d; s++, d++)
685                         continue;
686                 while (*s != '/')
687                         s--, d--;
688
689                 /* Count the number of directories we need to backtrack. */
690                 for (++d, lnk[0] = '\0'; *d; d++)
691                         if (*d == '/')
692                                 (void)strlcat(lnk, "../", sizeof(lnk));
693
694                 (void)strlcat(lnk, ++s, sizeof(lnk));
695
696                 do_symlink(lnk, to_name, target_sb);
697                 /* XXX: Link may point outside of destdir. */
698                 metadata_log(to_name, "link", NULL, lnk, NULL, 0);
699                 return;
700         }
701
702         /*
703          * If absolute or relative was not specified, try the names the
704          * user provided.
705          */
706         do_symlink(from_name, to_name, target_sb);
707         /* XXX: from_name may point outside of destdir. */
708         metadata_log(to_name, "link", NULL, from_name, NULL, 0);
709 }
710
711 /*
712  * install --
713  *      build a path name and install the file
714  */
715 static void
716 install(const char *from_name, const char *to_name, u_long fset, u_int flags)
717 {
718         struct stat from_sb, temp_sb, to_sb;
719         struct timeval tvb[2];
720         int devnull, files_match, from_fd, serrno, target;
721         int tempcopy, temp_fd, to_fd;
722         char backup[MAXPATHLEN], *p, pathbuf[MAXPATHLEN], tempfile[MAXPATHLEN];
723         char *digestresult;
724
725         files_match = 0;
726         from_fd = -1;
727         to_fd = -1;
728
729         /* If try to install NULL file to a directory, fails. */
730         if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) {
731                 if (!dolink) {
732                         if (stat(from_name, &from_sb))
733                                 err(EX_OSERR, "%s", from_name);
734                         if (!S_ISREG(from_sb.st_mode)) {
735                                 errno = EFTYPE;
736                                 err(EX_OSERR, "%s", from_name);
737                         }
738                 }
739                 /* Build the target path. */
740                 if (flags & DIRECTORY) {
741                         (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s",
742                             to_name,
743                             (p = strrchr(from_name, '/')) ? ++p : from_name);
744                         to_name = pathbuf;
745                 }
746                 devnull = 0;
747         } else {
748                 devnull = 1;
749         }
750
751         target = (lstat(to_name, &to_sb) == 0);
752
753         if (dolink) {
754                 if (target && !safecopy) {
755                         if (to_sb.st_mode & S_IFDIR && rmdir(to_name) == -1)
756                                 err(EX_OSERR, "%s", to_name);
757                         if (to_sb.st_flags & NOCHANGEBITS)
758                                 (void)chflags(to_name,
759                                     to_sb.st_flags & ~NOCHANGEBITS);
760                         unlink(to_name);
761                 }
762                 makelink(from_name, to_name, target ? &to_sb : NULL);
763                 return;
764         }
765
766         if (target && !S_ISREG(to_sb.st_mode) && !S_ISLNK(to_sb.st_mode)) {
767                 errno = EFTYPE;
768                 warn("%s", to_name);
769                 return;
770         }
771
772         /* Only copy safe if the target exists. */
773         tempcopy = safecopy && target;
774
775         if (!devnull && (from_fd = open(from_name, O_RDONLY, 0)) < 0)
776                 err(EX_OSERR, "%s", from_name);
777
778         /* If we don't strip, we can compare first. */
779         if (docompare && !dostrip && target && S_ISREG(to_sb.st_mode)) {
780                 if ((to_fd = open(to_name, O_RDONLY, 0)) < 0)
781                         err(EX_OSERR, "%s", to_name);
782                 if (devnull)
783                         files_match = to_sb.st_size == 0;
784                 else
785                         files_match = !(compare(from_fd, from_name,
786                             (size_t)from_sb.st_size, to_fd,
787                             to_name, (size_t)to_sb.st_size, &digestresult));
788
789                 /* Close "to" file unless we match. */
790                 if (!files_match)
791                         (void)close(to_fd);
792         }
793
794         if (!files_match) {
795                 if (tempcopy) {
796                         to_fd = create_tempfile(to_name, tempfile,
797                             sizeof(tempfile));
798                         if (to_fd < 0)
799                                 err(EX_OSERR, "%s", tempfile);
800                 } else {
801                         if ((to_fd = create_newfile(to_name, target,
802                             &to_sb)) < 0)
803                                 err(EX_OSERR, "%s", to_name);
804                         if (verbose)
805                                 (void)printf("install: %s -> %s\n",
806                                     from_name, to_name);
807                 }
808                 if (!devnull)
809                         digestresult = copy(from_fd, from_name, to_fd,
810                              tempcopy ? tempfile : to_name, from_sb.st_size);
811                 else
812                         digestresult = NULL;
813         }
814
815         if (dostrip) {
816                 strip(tempcopy ? tempfile : to_name);
817
818                 /*
819                  * Re-open our fd on the target, in case we used a strip
820                  * that does not work in-place -- like GNU binutils strip.
821                  */
822                 close(to_fd);
823                 to_fd = open(tempcopy ? tempfile : to_name, O_RDONLY, 0);
824                 if (to_fd < 0)
825                         err(EX_OSERR, "stripping %s", to_name);
826         }
827
828         /*
829          * Compare the stripped temp file with the target.
830          */
831         if (docompare && dostrip && target && S_ISREG(to_sb.st_mode)) {
832                 temp_fd = to_fd;
833
834                 /* Re-open to_fd using the real target name. */
835                 if ((to_fd = open(to_name, O_RDONLY, 0)) < 0)
836                         err(EX_OSERR, "%s", to_name);
837
838                 if (fstat(temp_fd, &temp_sb)) {
839                         serrno = errno;
840                         (void)unlink(tempfile);
841                         errno = serrno;
842                         err(EX_OSERR, "%s", tempfile);
843                 }
844
845                 if (compare(temp_fd, tempfile, (size_t)temp_sb.st_size, to_fd,
846                             to_name, (size_t)to_sb.st_size, &digestresult)
847                             == 0) {
848                         /*
849                          * If target has more than one link we need to
850                          * replace it in order to snap the extra links.
851                          * Need to preserve target file times, though.
852                          */
853                         if (to_sb.st_nlink != 1) {
854                                 tvb[0].tv_sec = to_sb.st_atime;
855                                 tvb[0].tv_usec = 0;
856                                 tvb[1].tv_sec = to_sb.st_mtime;
857                                 tvb[1].tv_usec = 0;
858                                 (void)utimes(tempfile, tvb);
859                         } else {
860                                 files_match = 1;
861                                 (void)unlink(tempfile);
862                         }
863                         (void) close(temp_fd);
864                 }
865         } else if (dostrip)
866                 digestresult = digest_file(tempfile);
867
868         /*
869          * Move the new file into place if doing a safe copy
870          * and the files are different (or just not compared).
871          */
872         if (tempcopy && !files_match) {
873                 /* Try to turn off the immutable bits. */
874                 if (to_sb.st_flags & NOCHANGEBITS)
875                         (void)chflags(to_name, to_sb.st_flags & ~NOCHANGEBITS);
876                 if (dobackup) {
877                         if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s", to_name,
878                             suffix) != strlen(to_name) + strlen(suffix)) {
879                                 unlink(tempfile);
880                                 errx(EX_OSERR, "%s: backup filename too long",
881                                     to_name);
882                         }
883                         if (verbose)
884                                 (void)printf("install: %s -> %s\n", to_name, backup);
885                         if (rename(to_name, backup) < 0) {
886                                 serrno = errno;
887                                 unlink(tempfile);
888                                 errno = serrno;
889                                 err(EX_OSERR, "rename: %s to %s", to_name,
890                                      backup);
891                         }
892                 }
893                 if (verbose)
894                         (void)printf("install: %s -> %s\n", from_name, to_name);
895                 if (rename(tempfile, to_name) < 0) {
896                         serrno = errno;
897                         unlink(tempfile);
898                         errno = serrno;
899                         err(EX_OSERR, "rename: %s to %s",
900                             tempfile, to_name);
901                 }
902
903                 /* Re-open to_fd so we aren't hosed by the rename(2). */
904                 (void) close(to_fd);
905                 if ((to_fd = open(to_name, O_RDONLY, 0)) < 0)
906                         err(EX_OSERR, "%s", to_name);
907         }
908
909         /*
910          * Preserve the timestamp of the source file if necessary.
911          */
912         if (dopreserve && !files_match && !devnull) {
913                 tvb[0].tv_sec = from_sb.st_atime;
914                 tvb[0].tv_usec = 0;
915                 tvb[1].tv_sec = from_sb.st_mtime;
916                 tvb[1].tv_usec = 0;
917                 (void)utimes(to_name, tvb);
918         }
919
920         if (fstat(to_fd, &to_sb) == -1) {
921                 serrno = errno;
922                 (void)unlink(to_name);
923                 errno = serrno;
924                 err(EX_OSERR, "%s", to_name);
925         }
926
927         /*
928          * Set owner, group, mode for target; do the chown first,
929          * chown may lose the setuid bits.
930          */
931         if (!dounpriv && ((gid != (gid_t)-1 && gid != to_sb.st_gid) ||
932             (uid != (uid_t)-1 && uid != to_sb.st_uid) ||
933             (mode != (to_sb.st_mode & ALLPERMS)))) {
934                 /* Try to turn off the immutable bits. */
935                 if (to_sb.st_flags & NOCHANGEBITS)
936                         (void)fchflags(to_fd, to_sb.st_flags & ~NOCHANGEBITS);
937         }
938
939         if (!dounpriv & 
940             (gid != (gid_t)-1 && gid != to_sb.st_gid) ||
941             (uid != (uid_t)-1 && uid != to_sb.st_uid))
942                 if (fchown(to_fd, uid, gid) == -1) {
943                         serrno = errno;
944                         (void)unlink(to_name);
945                         errno = serrno;
946                         err(EX_OSERR,"%s: chown/chgrp", to_name);
947                 }
948
949         if (mode != (to_sb.st_mode & ALLPERMS)) {
950                 if (fchmod(to_fd,
951                      dounpriv ? mode & (S_IRWXU|S_IRWXG|S_IRWXO) : mode)) {
952                         serrno = errno;
953                         (void)unlink(to_name);
954                         errno = serrno;
955                         err(EX_OSERR, "%s: chmod", to_name);
956                 }
957         }
958
959         /*
960          * If provided a set of flags, set them, otherwise, preserve the
961          * flags, except for the dump flag.
962          * NFS does not support flags.  Ignore EOPNOTSUPP flags if we're just
963          * trying to turn off UF_NODUMP.  If we're trying to set real flags,
964          * then warn if the fs doesn't support it, otherwise fail.
965          */
966         if (!dounpriv & !devnull && (flags & SETFLAGS ||
967             (from_sb.st_flags & ~UF_NODUMP) != to_sb.st_flags) &&
968             fchflags(to_fd,
969             flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) {
970                 if (flags & SETFLAGS) {
971                         if (errno == EOPNOTSUPP)
972                                 warn("%s: chflags", to_name);
973                         else {
974                                 serrno = errno;
975                                 (void)unlink(to_name);
976                                 errno = serrno;
977                                 err(EX_OSERR, "%s: chflags", to_name);
978                         }
979                 }
980         }
981
982         (void)close(to_fd);
983         if (!devnull)
984                 (void)close(from_fd);
985
986         metadata_log(to_name, "file", tvb, NULL, digestresult, to_sb.st_size);
987         free(digestresult);
988 }
989
990 /*
991  * compare --
992  *      compare two files; non-zero means files differ
993  */
994 static int
995 compare(int from_fd, const char *from_name __unused, size_t from_len,
996         int to_fd, const char *to_name __unused, size_t to_len,
997         char **dresp)
998 {
999         char *p, *q;
1000         int rv;
1001         int done_compare;
1002         DIGEST_CTX ctx;
1003
1004         rv = 0;
1005         if (from_len != to_len)
1006                 return 1;
1007
1008         if (from_len <= MAX_CMP_SIZE) {
1009                 if (dresp != NULL)
1010                         digest_init(&ctx);
1011                 done_compare = 0;
1012                 if (trymmap(from_fd) && trymmap(to_fd)) {
1013                         p = mmap(NULL, from_len, PROT_READ, MAP_SHARED,
1014                             from_fd, (off_t)0);
1015                         if (p == (char *)MAP_FAILED)
1016                                 goto out;
1017                         q = mmap(NULL, from_len, PROT_READ, MAP_SHARED,
1018                             to_fd, (off_t)0);
1019                         if (q == (char *)MAP_FAILED) {
1020                                 munmap(p, from_len);
1021                                 goto out;
1022                         }
1023
1024                         rv = memcmp(p, q, from_len);
1025                         if (dresp != NULL)
1026                                 digest_update(&ctx, p, from_len);
1027                         munmap(p, from_len);
1028                         munmap(q, from_len);
1029                         done_compare = 1;
1030                 }
1031         out:
1032                 if (!done_compare) {
1033                         char buf1[MAXBSIZE];
1034                         char buf2[MAXBSIZE];
1035                         int n1, n2;
1036
1037                         rv = 0;
1038                         lseek(from_fd, 0, SEEK_SET);
1039                         lseek(to_fd, 0, SEEK_SET);
1040                         while (rv == 0) {
1041                                 n1 = read(from_fd, buf1, sizeof(buf1));
1042                                 if (n1 == 0)
1043                                         break;          /* EOF */
1044                                 else if (n1 > 0) {
1045                                         n2 = read(to_fd, buf2, n1);
1046                                         if (n2 == n1)
1047                                                 rv = memcmp(buf1, buf2, n1);
1048                                         else
1049                                                 rv = 1; /* out of sync */
1050                                 } else
1051                                         rv = 1;         /* read failure */
1052                                 digest_update(&ctx, buf1, n1);
1053                         }
1054                         lseek(from_fd, 0, SEEK_SET);
1055                         lseek(to_fd, 0, SEEK_SET);
1056                 }
1057         } else
1058                 rv = 1; /* don't bother in this case */
1059
1060         if (dresp != NULL) {
1061                 if (rv == 0)
1062                         *dresp = digest_end(&ctx, NULL);
1063                 else
1064                         (void)digest_end(&ctx, NULL);
1065         }
1066
1067         return rv;
1068 }
1069
1070 /*
1071  * create_tempfile --
1072  *      create a temporary file based on path and open it
1073  */
1074 static int
1075 create_tempfile(const char *path, char *temp, size_t tsize)
1076 {
1077         char *p;
1078
1079         (void)strncpy(temp, path, tsize);
1080         temp[tsize - 1] = '\0';
1081         if ((p = strrchr(temp, '/')) != NULL)
1082                 p++;
1083         else
1084                 p = temp;
1085         (void)strncpy(p, "INS@XXXX", &temp[tsize - 1] - p);
1086         temp[tsize - 1] = '\0';
1087         return (mkstemp(temp));
1088 }
1089
1090 /*
1091  * create_newfile --
1092  *      create a new file, overwriting an existing one if necessary
1093  */
1094 static int
1095 create_newfile(const char *path, int target, struct stat *sbp)
1096 {
1097         char backup[MAXPATHLEN];
1098         int saved_errno = 0;
1099         int newfd;
1100
1101         if (target) {
1102                 /*
1103                  * Unlink now... avoid ETXTBSY errors later.  Try to turn
1104                  * off the append/immutable bits -- if we fail, go ahead,
1105                  * it might work.
1106                  */
1107                 if (sbp->st_flags & NOCHANGEBITS)
1108                         (void)chflags(path, sbp->st_flags & ~NOCHANGEBITS);
1109
1110                 if (dobackup) {
1111                         if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s",
1112                             path, suffix) != strlen(path) + strlen(suffix))
1113                                 errx(EX_OSERR, "%s: backup filename too long",
1114                                     path);
1115                         (void)snprintf(backup, MAXPATHLEN, "%s%s",
1116                             path, suffix);
1117                         if (verbose)
1118                                 (void)printf("install: %s -> %s\n",
1119                                     path, backup);
1120                         if (rename(path, backup) < 0)
1121                                 err(EX_OSERR, "rename: %s to %s", path, backup);
1122                 } else
1123                         if (unlink(path) < 0)
1124                                 saved_errno = errno;
1125         }
1126
1127         newfd = open(path, O_CREAT | O_RDWR | O_TRUNC, S_IRUSR | S_IWUSR);
1128         if (newfd < 0 && saved_errno != 0)
1129                 errno = saved_errno;
1130         return newfd;
1131 }
1132
1133 /*
1134  * copy --
1135  *      copy from one file to another
1136  */
1137 static char *
1138 copy(int from_fd, const char *from_name, int to_fd, const char *to_name,
1139     off_t size)
1140 {
1141         int nr, nw;
1142         int serrno;
1143         char *p, buf[MAXBSIZE];
1144         int done_copy;
1145         DIGEST_CTX ctx;
1146
1147         /* Rewind file descriptors. */
1148         if (lseek(from_fd, (off_t)0, SEEK_SET) == (off_t)-1)
1149                 err(EX_OSERR, "lseek: %s", from_name);
1150         if (lseek(to_fd, (off_t)0, SEEK_SET) == (off_t)-1)
1151                 err(EX_OSERR, "lseek: %s", to_name);
1152
1153         digest_init(&ctx);
1154
1155         /*
1156          * Mmap and write if less than 8M (the limit is so we don't totally
1157          * trash memory on big files.  This is really a minor hack, but it
1158          * wins some CPU back.
1159          */
1160         done_copy = 0;
1161         if (size <= 8 * 1048576 && trymmap(from_fd) &&
1162             (p = mmap(NULL, (size_t)size, PROT_READ, MAP_SHARED,
1163                     from_fd, (off_t)0)) != (char *)MAP_FAILED) {
1164                 nw = write(to_fd, p, size);
1165                 if (nw != size) {
1166                         serrno = errno;
1167                         (void)unlink(to_name);
1168                         if (nw >= 0) {
1169                                 errx(EX_OSERR,
1170      "short write to %s: %jd bytes written, %jd bytes asked to write",
1171                                     to_name, (uintmax_t)nw, (uintmax_t)size);
1172                         } else {
1173                                 errno = serrno;
1174                                 err(EX_OSERR, "%s", to_name);
1175                         }
1176                 }
1177                 digest_update(&ctx, p, size);
1178                 (void)munmap(p, size);
1179                 done_copy = 1;
1180         }
1181         if (!done_copy) {
1182                 while ((nr = read(from_fd, buf, sizeof(buf))) > 0) {
1183                         if ((nw = write(to_fd, buf, nr)) != nr) {
1184                                 serrno = errno;
1185                                 (void)unlink(to_name);
1186                                 if (nw >= 0) {
1187                                         errx(EX_OSERR,
1188      "short write to %s: %jd bytes written, %jd bytes asked to write",
1189                                             to_name, (uintmax_t)nw,
1190                                             (uintmax_t)size);
1191                                 } else {
1192                                         errno = serrno;
1193                                         err(EX_OSERR, "%s", to_name);
1194                                 }
1195                         }
1196                         digest_update(&ctx, buf, nr);
1197                 }
1198                 if (nr != 0) {
1199                         serrno = errno;
1200                         (void)unlink(to_name);
1201                         errno = serrno;
1202                         err(EX_OSERR, "%s", from_name);
1203                 }
1204         }
1205         return (digest_end(&ctx, NULL));
1206 }
1207
1208 /*
1209  * strip --
1210  *      use strip(1) to strip the target file
1211  */
1212 static void
1213 strip(const char *to_name)
1214 {
1215         const char *stripbin;
1216         int serrno, status;
1217
1218         switch (fork()) {
1219         case -1:
1220                 serrno = errno;
1221                 (void)unlink(to_name);
1222                 errno = serrno;
1223                 err(EX_TEMPFAIL, "fork");
1224         case 0:
1225                 stripbin = getenv("STRIPBIN");
1226                 if (stripbin == NULL)
1227                         stripbin = "strip";
1228                 execlp(stripbin, stripbin, to_name, (char *)NULL);
1229                 err(EX_OSERR, "exec(%s)", stripbin);
1230         default:
1231                 if (wait(&status) == -1 || status) {
1232                         serrno = errno;
1233                         (void)unlink(to_name);
1234                         errc(EX_SOFTWARE, serrno, "wait");
1235                         /* NOTREACHED */
1236                 }
1237         }
1238 }
1239
1240 /*
1241  * install_dir --
1242  *      build directory hierarchy
1243  */
1244 static void
1245 install_dir(char *path)
1246 {
1247         char *p;
1248         struct stat sb;
1249         int ch;
1250
1251         for (p = path;; ++p)
1252                 if (!*p || (p != path && *p  == '/')) {
1253                         ch = *p;
1254                         *p = '\0';
1255                         if (stat(path, &sb)) {
1256                                 if (errno != ENOENT || mkdir(path, 0755) < 0) {
1257                                         err(EX_OSERR, "mkdir %s", path);
1258                                         /* NOTREACHED */
1259                                 } else if (verbose)
1260                                         (void)printf("install: mkdir %s\n",
1261                                                      path);
1262                         } else if (!S_ISDIR(sb.st_mode))
1263                                 errx(EX_OSERR, "%s exists but is not a directory", path);
1264                         if (!(*p = ch))
1265                                 break;
1266                 }
1267
1268         if (!dounpriv) {
1269                 if ((gid != (gid_t)-1 || uid != (uid_t)-1) &&
1270                     chown(path, uid, gid))
1271                         warn("chown %u:%u %s", uid, gid, path);
1272                 /* XXXBED: should we do the chmod in the dounpriv case? */
1273                 if (chmod(path, mode))
1274                         warn("chmod %o %s", mode, path);
1275         }
1276         metadata_log(path, "dir", NULL, NULL, NULL, 0);
1277 }
1278
1279 /*
1280  * metadata_log --
1281  *      if metafp is not NULL, output mtree(8) full path name and settings to
1282  *      metafp, to allow permissions to be set correctly by other tools,
1283  *      or to allow integrity checks to be performed.
1284  */
1285 static void
1286 metadata_log(const char *path, const char *type, struct timeval *tv,
1287         const char *slink, const char *digestresult, off_t size)
1288 {
1289         static const char extra[] = { ' ', '\t', '\n', '\\', '#', '\0' };
1290         const char *p;
1291         char *buf;
1292         size_t destlen;
1293         struct flock metalog_lock;
1294
1295         if (!metafp)    
1296                 return;
1297         /* Buffer for strsvis(3). */
1298         buf = (char *)malloc(4 * strlen(path) + 1);
1299         if (buf == NULL) {
1300                 warnx("%s", strerror(ENOMEM));
1301                 return;
1302         }
1303
1304         /* Lock log file. */
1305         metalog_lock.l_start = 0;
1306         metalog_lock.l_len = 0;
1307         metalog_lock.l_whence = SEEK_SET;
1308         metalog_lock.l_type = F_WRLCK;
1309         if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1) {
1310                 warn("can't lock %s", metafile);
1311                 free(buf);
1312                 return;
1313         }
1314
1315         /* Remove destdir. */
1316         p = path;
1317         if (destdir) {
1318                 destlen = strlen(destdir);
1319                 if (strncmp(p, destdir, destlen) == 0 &&
1320                     (p[destlen] == '/' || p[destlen] == '\0'))
1321                         p += destlen;
1322         }
1323         while (*p && *p == '/')
1324                 p++;
1325         strsvis(buf, p, VIS_OCTAL, extra);
1326         p = buf;
1327         /* Print details. */
1328         fprintf(metafp, ".%s%s type=%s", *p ? "/" : "", p, type);
1329         if (owner)
1330                 fprintf(metafp, " uname=%s", owner);
1331         if (group)
1332                 fprintf(metafp, " gname=%s", group);
1333         fprintf(metafp, " mode=%#o", mode);
1334         if (slink) {
1335                 strsvis(buf, slink, VIS_CSTYLE, extra); /* encode link */
1336                 fprintf(metafp, " link=%s", buf);
1337         }
1338         if (*type == 'f') /* type=file */
1339                 fprintf(metafp, " size=%lld", (long long)size);
1340         if (tv != NULL && dopreserve)
1341                 fprintf(metafp, " time=%lld.%ld",
1342                         (long long)tv[1].tv_sec, (long)tv[1].tv_usec);
1343         if (digestresult && digest)
1344                 fprintf(metafp, " %s=%s", digest, digestresult);
1345         if (fflags)
1346                 fprintf(metafp, " flags=%s", fflags);
1347         if (tags)
1348                 fprintf(metafp, " tags=%s", tags);
1349         fputc('\n', metafp);
1350         /* Flush line. */
1351         fflush(metafp);
1352
1353         /* Unlock log file. */
1354         metalog_lock.l_type = F_UNLCK;
1355         if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1)
1356                 warn("can't unlock %s", metafile);
1357         free(buf);
1358 }
1359
1360 /*
1361  * usage --
1362  *      print a usage message and die
1363  */
1364 static void
1365 usage(void)
1366 {
1367         (void)fprintf(stderr,
1368 "usage: install [-bCcpSsUv] [-f flags] [-g group] [-m mode] [-o owner]\n"
1369 "               [-M log] [-D dest] [-h hash] [-T tags]\n"
1370 "               [-B suffix] [-l linkflags] [-N dbdir]\n"
1371 "               file1 file2\n"
1372 "       install [-bCcpSsUv] [-f flags] [-g group] [-m mode] [-o owner]\n"
1373 "               [-M log] [-D dest] [-h hash] [-T tags]\n"
1374 "               [-B suffix] [-l linkflags] [-N dbdir]\n"
1375 "               file1 ... fileN directory\n"
1376 "       install -dU [-vU] [-g group] [-m mode] [-N dbdir] [-o owner]\n"
1377 "               [-M log] [-D dest] [-h hash] [-T tags]\n"
1378 "               directory ...\n");
1379         exit(EX_USAGE);
1380         /* NOTREACHED */
1381 }
1382
1383 /*
1384  * trymmap --
1385  *      return true (1) if mmap should be tried, false (0) if not.
1386  */
1387 static int
1388 trymmap(int fd)
1389 {
1390 /*
1391  * The ifdef is for bootstrapping - f_fstypename doesn't exist in
1392  * pre-Lite2-merge systems.
1393  */
1394 #ifdef MFSNAMELEN
1395         struct statfs stfs;
1396
1397         if (fstatfs(fd, &stfs) != 0)
1398                 return (0);
1399         if (strcmp(stfs.f_fstypename, "ufs") == 0 ||
1400             strcmp(stfs.f_fstypename, "cd9660") == 0)
1401                 return (1);
1402 #endif
1403         return (0);
1404 }