source: trunk/src/kmk/kmkbuiltin/install.c@ 1308

Last change on this file since 1308 was 1194, checked in by bird, 18 years ago

Fixed a couple of slash problems in cp and install (dos based systems).
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 23.8 KB
Line 
1/*
2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1987, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
38#endif /* not lint */
39
40#if 0
41#ifndef lint
42static char sccsid[] = "@(#)xinstall.c 8.1 (Berkeley) 7/21/93";
43#endif /* not lint */
44
45#include <sys/cdefs.h>
46__FBSDID("$FreeBSD: src/usr.bin/xinstall/xinstall.c,v 1.66 2005/01/25 14:34:57 ssouhlal Exp $");
47#endif
48
49#ifndef _MSC_VER
50# include <sys/param.h>
51# ifdef USE_MMAP
52# include <sys/mman.h>
53# endif
54# include <sys/mount.h>
55# include <sys/wait.h>
56# include <sys/time.h>
57#endif /* !_MSC_VER */
58#include <sys/stat.h>
59
60#include <ctype.h>
61#include "err.h"
62#include <errno.h>
63#include <fcntl.h>
64#include <grp.h>
65#include <paths.h>
66#include <pwd.h>
67#include <stdio.h>
68#include <stdlib.h>
69#include <string.h>
70#include <sysexits.h>
71#include <unistd.h>
72#if defined(__EMX__) || defined(_MSC_VER)
73# include <process.h>
74#endif
75
76#ifdef __sun__
77# include "solfakes.h"
78#endif
79#ifdef _MSC_VER
80# include "mscfakes.h"
81#endif
82
83#include "kmkbuiltin.h"
84
85
86extern void * setmode(const char *p);
87extern mode_t getmode(const void *bbox, mode_t omode);
88
89#ifndef __unused
90# define __unused
91#endif
92
93#ifndef MAXBSIZE
94# define MAXBSIZE 0x20000
95#endif
96
97/* Bootstrap aid - this doesn't exist in most older releases */
98#ifndef MAP_FAILED
99#define MAP_FAILED ((void *)-1) /* from <sys/mman.h> */
100#endif
101
102#define MAX_CMP_SIZE (16 * 1024 * 1024)
103
104#define DIRECTORY 0x01 /* Tell install it's a directory. */
105#define SETFLAGS 0x02 /* Tell install to set flags. */
106#define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND)
107#define BACKUP_SUFFIX ".old"
108
109#ifndef O_BINARY
110# define O_BINARY 0
111#endif
112
113#ifndef EFTYPE
114# define EFTYPE EINVAL
115#endif
116
117#if defined(__WIN32__) || defined(__WIN64__) || defined(__OS2__)
118# define IS_SLASH(ch) ((ch) == '/' || (ch) == '\\')
119#else
120# define IS_SLASH(ch) ((ch) == '/')
121#endif
122
123static gid_t gid;
124static uid_t uid;
125static int dobackup, docompare, dodir, dopreserve, dostrip, nommap, safecopy, verbose;
126static mode_t mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
127static const char *suffix = BACKUP_SUFFIX;
128
129static struct option long_options[] =
130{
131 { "help", no_argument, 0, 261 },
132 { "version", no_argument, 0, 262 },
133 { 0, 0, 0, 0 },
134};
135
136
137static int copy(int, const char *, int, const char *, off_t);
138static int compare(int, const char *, size_t, int, const char *, size_t);
139static int create_newfile(const char *, int, struct stat *);
140static int create_tempfile(const char *, char *, size_t);
141static int install(const char *, const char *, u_long, u_int);
142static int install_dir(char *);
143static u_long numeric_id(const char *, const char *);
144static int strip(const char *);
145#ifdef USE_MMAP
146static int trymmap(int);
147#endif
148static int usage(FILE *);
149static char *last_slash(const char *);
150
151int
152kmk_builtin_install(int argc, char *argv[], char **envp)
153{
154 struct stat from_sb, to_sb;
155 mode_t *set;
156 u_long fset = 0;
157 int ch, no_target;
158 u_int iflags;
159 char *flags;
160 const char *group, *owner, *to_name;
161
162 /* reinitialize globals */
163 mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
164 suffix = BACKUP_SUFFIX;
165 gid = 0;
166 uid = 0;
167 dobackup = docompare = dodir = dopreserve = dostrip = nommap = safecopy = verbose = 0;
168
169 /* reset getopt and set progname. */
170 g_progname = argv[0];
171 opterr = 1;
172 optarg = NULL;
173 optopt = 0;
174 optind = 0; /* init */
175
176 iflags = 0;
177 group = owner = NULL;
178 while ((ch = getopt_long(argc, argv, "B:bCcdf:g:Mm:o:pSsv", long_options, NULL)) != -1)
179 switch((char)ch) {
180 case 'B':
181 suffix = optarg;
182 /* FALLTHROUGH */
183 case 'b':
184 dobackup = 1;
185 break;
186 case 'C':
187 docompare = 1;
188 break;
189 case 'c':
190 /* For backwards compatibility. */
191 break;
192 case 'd':
193 dodir = 1;
194 break;
195 case 'f':
196#ifdef UF_IMMUTABLE
197 flags = optarg;
198 if (strtofflags(&flags, &fset, NULL))
199 return errx(EX_USAGE, "%s: invalid flag", flags);
200 iflags |= SETFLAGS;
201#else
202 (void)flags;
203#endif
204 break;
205 case 'g':
206 group = optarg;
207 break;
208 case 'M':
209 nommap = 1;
210 break;
211 case 'm':
212#ifdef __EMX__
213 if (!(set = bsd_setmode(optarg)))
214#else
215 if (!(set = setmode(optarg)))
216#endif
217 return errx(EX_USAGE, "invalid file mode: %s",
218 optarg);
219 mode = getmode(set, 0);
220 free(set);
221 break;
222 case 'o':
223 owner = optarg;
224 break;
225 case 'p':
226 docompare = dopreserve = 1;
227 break;
228 case 'S':
229 safecopy = 1;
230 break;
231 case 's':
232 dostrip = 1;
233 break;
234 case 'v':
235 verbose = 1;
236 break;
237 case 261:
238 usage(stdout);
239 return 0;
240 case 262:
241 return kbuild_version(argv[0]);
242 case '?':
243 default:
244 return usage(stderr);
245 }
246 argc -= optind;
247 argv += optind;
248
249 /* some options make no sense when creating directories */
250 if (dostrip && dodir) {
251 warnx("-d and -s may not be specified together");
252 return usage(stderr);
253 }
254
255 /* must have at least two arguments, except when creating directories */
256 if (argc == 0 || (argc == 1 && !dodir))
257 return usage(stderr);
258
259 /* need to make a temp copy so we can compare stripped version */
260 if (docompare && dostrip)
261 safecopy = 1;
262
263 /* get group and owner id's */
264 if (group != NULL) {
265#ifndef _MSC_VER
266 struct group *gp;
267 if ((gp = getgrnam(group)) != NULL)
268 gid = gp->gr_gid;
269 else
270#endif
271 {
272 gid = (gid_t)numeric_id(group, "group");
273 if (gid == (gid_t)-1)
274 return 1;
275 }
276 } else
277 gid = (gid_t)-1;
278
279 if (owner != NULL) {
280#ifndef _MSC_VER
281 struct passwd *pp;
282 if ((pp = getpwnam(owner)) != NULL)
283 uid = pp->pw_uid;
284 else
285#endif
286 {
287 uid = (uid_t)numeric_id(owner, "user");
288 if (uid == (uid_t)-1)
289 return 1;
290 }
291 } else
292 uid = (uid_t)-1;
293
294 if (dodir) {
295 for (; *argv != NULL; ++argv) {
296 int rc = install_dir(*argv);
297 if (rc)
298 return rc;
299 }
300 return EX_OK;
301 /* NOTREACHED */
302 }
303
304 no_target = stat(to_name = argv[argc - 1], &to_sb);
305 if (!no_target && S_ISDIR(to_sb.st_mode)) {
306 for (; *argv != to_name; ++argv) {
307 int rc = install(*argv, to_name, fset, iflags | DIRECTORY);
308 if (rc)
309 return rc;
310 }
311 return EX_OK;
312 }
313
314 /* can't do file1 file2 directory/file */
315 if (argc != 2) {
316 warnx("wrong number or types of arguments");
317 return usage(stderr);
318 }
319
320 if (!no_target) {
321 if (stat(*argv, &from_sb))
322 return err(EX_OSERR, "%s", *argv);
323 if (!S_ISREG(to_sb.st_mode)) {
324 errno = EFTYPE;
325 return err(EX_OSERR, "%s", to_name);
326 }
327 if (to_sb.st_dev == from_sb.st_dev &&
328 to_sb.st_dev != 0 &&
329 to_sb.st_ino == from_sb.st_ino &&
330 to_sb.st_ino != 0)
331 return errx(EX_USAGE,
332 "%s and %s are the same file", *argv, to_name);
333 }
334 return install(*argv, to_name, fset, iflags);
335}
336
337static u_long
338numeric_id(const char *name, const char *type)
339{
340 u_long val;
341 char *ep;
342
343 /*
344 * XXX
345 * We know that uid_t's and gid_t's are unsigned longs.
346 */
347 errno = 0;
348 val = strtoul(name, &ep, 10);
349 if (errno)
350 return err(-1, "%s", name);
351 if (*ep != '\0')
352 return errx(-1, "unknown %s %s", type, name);
353 return (val);
354}
355
356/*
357 * install --
358 * build a path name and install the file
359 */
360static int
361install(const char *from_name, const char *to_name, u_long fset, u_int flags)
362{
363 struct stat from_sb, temp_sb, to_sb;
364 struct timeval tvb[2];
365 int devnull, files_match, from_fd, serrno, target;
366 int tempcopy, temp_fd, to_fd;
367 char backup[MAXPATHLEN], *p, pathbuf[MAXPATHLEN], tempfile[MAXPATHLEN];
368 int rc = EX_OK;
369
370 files_match = 0;
371 from_fd = -1;
372 to_fd = -1;
373 temp_fd = -1;
374
375 /* If try to install NULL file to a directory, fails. */
376 if (flags & DIRECTORY
377#if defined(__EMX__) || defined(_MSC_VER)
378 || ( stricmp(from_name, _PATH_DEVNULL)
379 && stricmp(from_name, "nul")
380#ifdef __EMX__
381 && stricmp(from_name, "/dev/nul")
382#endif
383 )
384#else
385 || strcmp(from_name, _PATH_DEVNULL)
386#endif
387 ) {
388 if (stat(from_name, &from_sb))
389 return err(EX_OSERR, "%s", from_name);
390 if (!S_ISREG(from_sb.st_mode)) {
391 errno = EFTYPE;
392 return err(EX_OSERR, "%s", from_name);
393 }
394 /* Build the target path. */
395 if (flags & DIRECTORY) {
396 (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s",
397 to_name,
398 (p = last_slash(from_name)) ? ++p : from_name);
399 to_name = pathbuf;
400 }
401 devnull = 0;
402 } else {
403 devnull = 1;
404 }
405
406 target = stat(to_name, &to_sb) == 0;
407
408 /* Only install to regular files. */
409 if (target && !S_ISREG(to_sb.st_mode)) {
410 errno = EFTYPE;
411 warn("%s", to_name);
412 return EX_OK;
413 }
414
415 /* Only copy safe if the target exists. */
416 tempcopy = safecopy && target;
417
418 if (!devnull && (from_fd = open(from_name, O_RDONLY | O_BINARY, 0)) < 0)
419 return err(EX_OSERR, "%s", from_name);
420
421 /* If we don't strip, we can compare first. */
422 if (docompare && !dostrip && target) {
423 if ((to_fd = open(to_name, O_RDONLY | O_BINARY, 0)) < 0) {
424 rc = err(EX_OSERR, "%s", to_name);
425 goto l_done;
426 }
427 if (devnull)
428 files_match = to_sb.st_size == 0;
429 else
430 files_match = !(compare(from_fd, from_name,
431 (size_t)from_sb.st_size, to_fd,
432 to_name, (size_t)to_sb.st_size));
433
434 /* Close "to" file unless we match. */
435 if (!files_match) {
436 (void)close(to_fd);
437 to_fd = -1;
438 }
439 }
440
441 if (!files_match) {
442 if (tempcopy) {
443 to_fd = create_tempfile(to_name, tempfile,
444 sizeof(tempfile));
445 if (to_fd < 0) {
446 rc = err(EX_OSERR, "%s", tempfile);
447 goto l_done;
448 }
449 } else {
450 if ((to_fd = create_newfile(to_name, target,
451 &to_sb)) < 0) {
452 rc = err(EX_OSERR, "%s", to_name);
453 goto l_done;
454 }
455 if (verbose)
456 (void)printf("install: %s -> %s\n",
457 from_name, to_name);
458 }
459 if (!devnull) {
460 rc = copy(from_fd, from_name, to_fd,
461 tempcopy ? tempfile : to_name, from_sb.st_size);
462 if (rc)
463 goto l_done;
464 }
465 }
466
467 if (dostrip) {
468#if defined(__EMX__) || defined(_MSC_VER)
469 /* close before we strip. */
470 close(to_fd);
471 to_fd = -1;
472#endif
473 rc = strip(tempcopy ? tempfile : to_name);
474 if (rc)
475 goto l_done;
476
477 /*
478 * Re-open our fd on the target, in case we used a strip
479 * that does not work in-place -- like GNU binutils strip.
480 */
481#if !defined(__EMX__) && !defined(_MSC_VER)
482 close(to_fd);
483#endif
484 to_fd = open(tempcopy ? tempfile : to_name, O_RDONLY | O_BINARY, 0);
485 if (to_fd < 0) {
486 rc = err(EX_OSERR, "stripping %s", to_name);
487 goto l_done;
488 }
489 }
490
491 /*
492 * Compare the stripped temp file with the target.
493 */
494 if (docompare && dostrip && target) {
495 temp_fd = to_fd;
496
497 /* Re-open to_fd using the real target name. */
498 if ((to_fd = open(to_name, O_RDONLY | O_BINARY, 0)) < 0) {
499 rc = err(EX_OSERR, "%s", to_name);
500 goto l_done;
501 }
502
503 if (fstat(temp_fd, &temp_sb)) {
504 serrno = errno;
505 (void)unlink(tempfile);
506 errno = serrno;
507 rc = err(EX_OSERR, "%s", tempfile);
508 goto l_done;
509 }
510
511 if (compare(temp_fd, tempfile, (size_t)temp_sb.st_size, to_fd,
512 to_name, (size_t)to_sb.st_size) == 0) {
513 /*
514 * If target has more than one link we need to
515 * replace it in order to snap the extra links.
516 * Need to preserve target file times, though.
517 */
518#if !defined(_MSC_VER) && !defined(__EMX__)
519 if (to_sb.st_nlink != 1) {
520 tvb[0].tv_sec = to_sb.st_atime;
521 tvb[0].tv_usec = 0;
522 tvb[1].tv_sec = to_sb.st_mtime;
523 tvb[1].tv_usec = 0;
524 (void)utimes(tempfile, tvb);
525 } else
526#endif
527 {
528
529 files_match = 1;
530 (void)unlink(tempfile);
531 }
532 (void) close(temp_fd);
533 temp_fd = -1;
534 }
535 }
536
537 /*
538 * Move the new file into place if doing a safe copy
539 * and the files are different (or just not compared).
540 */
541 if (tempcopy && !files_match) {
542#ifdef UF_IMMUTABLE
543 /* Try to turn off the immutable bits. */
544 if (to_sb.st_flags & NOCHANGEBITS)
545 (void)chflags(to_name, to_sb.st_flags & ~NOCHANGEBITS);
546#endif
547 if (dobackup) {
548 if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s", to_name,
549 suffix) != strlen(to_name) + strlen(suffix)) {
550 unlink(tempfile);
551 rc = errx(EX_OSERR, "%s: backup filename too long",
552 to_name);
553 goto l_done;
554 }
555 if (verbose)
556 (void)printf("install: %s -> %s\n", to_name, backup);
557 if (rename(to_name, backup) < 0) {
558 serrno = errno;
559 unlink(tempfile);
560 errno = serrno;
561 rc = err(EX_OSERR, "rename: %s to %s", to_name,
562 backup);
563 goto l_done;
564 }
565 }
566 if (verbose)
567 (void)printf("install: %s -> %s\n", from_name, to_name);
568 if (rename(tempfile, to_name) < 0) {
569 serrno = errno;
570 unlink(tempfile);
571 errno = serrno;
572 rc = err(EX_OSERR, "rename: %s to %s",
573 tempfile, to_name);
574 goto l_done;
575 }
576
577 /* Re-open to_fd so we aren't hosed by the rename(2). */
578 (void) close(to_fd);
579 if ((to_fd = open(to_name, O_RDONLY | O_BINARY, 0)) < 0) {
580 rc = err(EX_OSERR, "%s", to_name);
581 goto l_done;
582 }
583 }
584
585 /*
586 * Preserve the timestamp of the source file if necessary.
587 */
588 if (dopreserve && !files_match && !devnull) {
589 tvb[0].tv_sec = from_sb.st_atime;
590 tvb[0].tv_usec = 0;
591 tvb[1].tv_sec = from_sb.st_mtime;
592 tvb[1].tv_usec = 0;
593 (void)utimes(to_name, tvb);
594 }
595
596 if (fstat(to_fd, &to_sb) == -1) {
597 serrno = errno;
598 (void)unlink(to_name);
599 errno = serrno;
600 rc = err(EX_OSERR, "%s", to_name);
601 goto l_done;
602 }
603
604 /*
605 * Set owner, group, mode for target; do the chown first,
606 * chown may lose the setuid bits.
607 */
608#ifdef UF_IMMUTABLE
609 if ((gid != (gid_t)-1 && gid != to_sb.st_gid) ||
610 (uid != (uid_t)-1 && uid != to_sb.st_uid) ||
611 (mode != (to_sb.st_mode & ALLPERMS))) {
612 /* Try to turn off the immutable bits. */
613 if (to_sb.st_flags & NOCHANGEBITS)
614 (void)fchflags(to_fd, to_sb.st_flags & ~NOCHANGEBITS);
615 }
616#endif
617
618 if ((gid != (gid_t)-1 && gid != to_sb.st_gid) ||
619 (uid != (uid_t)-1 && uid != to_sb.st_uid))
620 if (fchown(to_fd, uid, gid) == -1) {
621 serrno = errno;
622 (void)unlink(to_name);
623 errno = serrno;
624 rc = err(EX_OSERR,"%s: chown/chgrp", to_name);
625 goto l_done;
626 }
627
628 if (mode != (to_sb.st_mode & ALLPERMS))
629 if (fchmod(to_fd, mode)) {
630 serrno = errno;
631 (void)unlink(to_name);
632 errno = serrno;
633 rc = err(EX_OSERR, "%s: chmod", to_name);
634 goto l_done;
635 }
636
637 /*
638 * If provided a set of flags, set them, otherwise, preserve the
639 * flags, except for the dump flag.
640 * NFS does not support flags. Ignore EOPNOTSUPP flags if we're just
641 * trying to turn off UF_NODUMP. If we're trying to set real flags,
642 * then warn if the the fs doesn't support it, otherwise fail.
643 */
644#ifdef UF_IMMUTABLE
645 if (!devnull && (flags & SETFLAGS ||
646 (from_sb.st_flags & ~UF_NODUMP) != to_sb.st_flags) &&
647 fchflags(to_fd,
648 flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) {
649 if (flags & SETFLAGS) {
650 if (errno == EOPNOTSUPP)
651 warn("%s: chflags", to_name);
652 else {
653 serrno = errno;
654 (void)unlink(to_name);
655 errno = serrno;
656 rc = err(EX_OSERR, "%s: chflags", to_name);
657 goto l_done;
658 }
659 }
660 }
661#endif
662
663l_done:
664 if (to_fd >= 0)
665 (void)close(to_fd);
666 if (temp_fd >= 0)
667 (void)close(temp_fd);
668 if (!devnull)
669 (void)close(from_fd);
670 return rc;
671}
672
673/*
674 * compare --
675 * compare two files; non-zero means files differ
676 */
677static int
678compare(int from_fd, const char *from_name __unused, size_t from_len,
679 int to_fd, const char *to_name __unused, size_t to_len)
680{
681 char *p, *q;
682 int rv;
683 int done_compare;
684
685 rv = 0;
686 if (from_len != to_len)
687 return 1;
688
689 if (from_len <= MAX_CMP_SIZE) {
690#ifdef USE_MMAP
691 done_compare = 0;
692 if (trymmap(from_fd) && trymmap(to_fd)) {
693 p = mmap(NULL, from_len, PROT_READ, MAP_SHARED, from_fd, (off_t)0);
694 if (p == (char *)MAP_FAILED)
695 goto out;
696 q = mmap(NULL, from_len, PROT_READ, MAP_SHARED, to_fd, (off_t)0);
697 if (q == (char *)MAP_FAILED) {
698 munmap(p, from_len);
699 goto out;
700 }
701
702 rv = memcmp(p, q, from_len);
703 munmap(p, from_len);
704 munmap(q, from_len);
705 done_compare = 1;
706 }
707 out:
708#else
709 (void)p; (void)q;
710 done_compare = 0;
711#endif
712 if (!done_compare) {
713 char buf1[MAXBSIZE];
714 char buf2[MAXBSIZE];
715 int n1, n2;
716
717 rv = 0;
718 lseek(from_fd, 0, SEEK_SET);
719 lseek(to_fd, 0, SEEK_SET);
720 while (rv == 0) {
721 n1 = read(from_fd, buf1, sizeof(buf1));
722 if (n1 == 0)
723 break; /* EOF */
724 else if (n1 > 0) {
725 n2 = read(to_fd, buf2, n1);
726 if (n2 == n1)
727 rv = memcmp(buf1, buf2, n1);
728 else
729 rv = 1; /* out of sync */
730 } else
731 rv = 1; /* read failure */
732 }
733 lseek(from_fd, 0, SEEK_SET);
734 lseek(to_fd, 0, SEEK_SET);
735 }
736 } else
737 rv = 1; /* don't bother in this case */
738
739 return rv;
740}
741
742/*
743 * create_tempfile --
744 * create a temporary file based on path and open it
745 */
746int
747create_tempfile(const char *path, char *temp, size_t tsize)
748{
749 char *p;
750
751 (void)strncpy(temp, path, tsize);
752 temp[tsize - 1] = '\0';
753 if ((p = last_slash(temp)) != NULL)
754 p++;
755 else
756 p = temp;
757 (void)strncpy(p, "INS@XXXX", &temp[tsize - 1] - p);
758 temp[tsize - 1] = '\0';
759 return (mkstemp(temp));
760}
761
762/*
763 * create_newfile --
764 * create a new file, overwriting an existing one if necessary
765 */
766int
767create_newfile(const char *path, int target, struct stat *sbp)
768{
769 char backup[MAXPATHLEN];
770 int saved_errno = 0;
771 int newfd;
772
773 if (target) {
774 /*
775 * Unlink now... avoid ETXTBSY errors later. Try to turn
776 * off the append/immutable bits -- if we fail, go ahead,
777 * it might work.
778 */
779#ifdef UF_IMMUTABLE
780 if (sbp->st_flags & NOCHANGEBITS)
781 (void)chflags(path, sbp->st_flags & ~NOCHANGEBITS);
782#endif
783
784 if (dobackup) {
785 if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s",
786 path, suffix) != strlen(path) + strlen(suffix)) {
787 errx(EX_OSERR, "%s: backup filename too long",
788 path);
789 errno = ENAMETOOLONG;
790 return -1;
791 }
792 (void)snprintf(backup, MAXPATHLEN, "%s%s",
793 path, suffix);
794 if (verbose)
795 (void)printf("install: %s -> %s\n",
796 path, backup);
797 if (rename(path, backup) < 0) {
798 err(EX_OSERR, "rename: %s to %s", path, backup);
799 return -1;
800 }
801 } else
802 if (unlink(path) < 0)
803 saved_errno = errno;
804 }
805
806 newfd = open(path, O_CREAT | O_RDWR | O_TRUNC | O_BINARY, S_IRUSR | S_IWUSR);
807 if (newfd < 0 && saved_errno != 0)
808 errno = saved_errno;
809 return newfd;
810}
811
812/*
813 * copy --
814 * copy from one file to another
815 */
816static int
817copy(int from_fd, const char *from_name, int to_fd, const char *to_name,
818 off_t size)
819{
820 int nr, nw;
821 int serrno;
822 char *p, buf[MAXBSIZE];
823 int done_copy;
824
825 /* Rewind file descriptors. */
826 if (lseek(from_fd, (off_t)0, SEEK_SET) == (off_t)-1)
827 return err(EX_OSERR, "lseek: %s", from_name);
828 if (lseek(to_fd, (off_t)0, SEEK_SET) == (off_t)-1)
829 return err(EX_OSERR, "lseek: %s", to_name);
830
831 /*
832 * Mmap and write if less than 8M (the limit is so we don't totally
833 * trash memory on big files. This is really a minor hack, but it
834 * wins some CPU back.
835 */
836 done_copy = 0;
837#ifdef USE_MMAP
838 if (size <= 8 * 1048576 && trymmap(from_fd) &&
839 (p = mmap(NULL, (size_t)size, PROT_READ, MAP_SHARED,
840 from_fd, (off_t)0)) != (char *)MAP_FAILED) {
841 if ((nw = write(to_fd, p, size)) != size) {
842 serrno = errno;
843 (void)unlink(to_name);
844 errno = nw > 0 ? EIO : serrno;
845 err(EX_OSERR, "%s", to_name);
846 }
847 done_copy = 1;
848 }
849#else
850 (void)p;
851#endif
852 if (!done_copy) {
853 while ((nr = read(from_fd, buf, sizeof(buf))) > 0)
854 if ((nw = write(to_fd, buf, nr)) != nr) {
855 serrno = errno;
856 (void)unlink(to_name);
857 errno = nw > 0 ? EIO : serrno;
858 return err(EX_OSERR, "%s", to_name);
859 }
860 if (nr != 0) {
861 serrno = errno;
862 (void)unlink(to_name);
863 errno = serrno;
864 return err(EX_OSERR, "%s", from_name);
865 }
866 }
867 return EX_OK;
868}
869
870/*
871 * strip --
872 * use strip(1) to strip the target file
873 */
874static int
875strip(const char *to_name)
876{
877#if defined(__EMX__) || defined(_MSC_VER)
878 const char *stripbin = getenv("STRIPBIN");
879 if (stripbin == NULL)
880 stripbin = "strip";
881 return spawnlp(P_WAIT, stripbin, stripbin, to_name, NULL);
882#else
883 const char *stripbin;
884 int serrno, status;
885 pid_t pid;
886
887 pid = fork();
888 switch (pid) {
889 case -1:
890 serrno = errno;
891 (void)unlink(to_name);
892 errno = serrno;
893 err(EX_TEMPFAIL, "fork");
894 case 0:
895 stripbin = getenv("STRIPBIN");
896 if (stripbin == NULL)
897 stripbin = "strip";
898 execlp(stripbin, stripbin, to_name, (char *)NULL);
899 err(EX_OSERR, "exec(%s)", stripbin);
900 default:
901 if (waitpid(pid, &status, 0) == -1 || status) {
902 serrno = errno;
903 (void)unlink(to_name);
904 errno = serrno;
905 err(EX_SOFTWARE, "waitpid");
906 /* NOTREACHED */
907 }
908 }
909#endif
910}
911
912/*
913 * install_dir --
914 * build directory heirarchy
915 */
916static int
917install_dir(char *path)
918{
919 char *p;
920 struct stat sb;
921 int ch;
922
923 for (p = path;; ++p)
924 if (!*p || (p != path && IS_SLASH(*p))) {
925 ch = *p;
926 *p = '\0';
927 if (stat(path, &sb)) {
928 if (errno != ENOENT || mkdir(path, 0755) < 0) {
929 return err(EX_OSERR, "mkdir %s", path);
930 /* NOTREACHED */
931 } else if (verbose)
932 (void)printf("install: mkdir %s\n",
933 path);
934 } else if (!S_ISDIR(sb.st_mode))
935 return errx(EX_OSERR, "%s exists but is not a directory", path);
936 if (!(*p = ch))
937 break;
938 }
939
940 if ((gid != (gid_t)-1 || uid != (uid_t)-1) && chown(path, uid, gid))
941 warn("chown %u:%u %s", uid, gid, path);
942 if (chmod(path, mode))
943 warn("chmod %o %s", mode, path);
944 return EX_OK;
945}
946
947/*
948 * usage --
949 * print a usage message and die
950 */
951static int
952usage(FILE *pf)
953{
954 fprintf(stderr,
955"usage: %s [-bCcpSsv] [-B suffix] [-f flags] [-g group] [-m mode]\n"
956" [-o owner] file1 file2\n"
957" or: %s [-bCcpSsv] [-B suffix] [-f flags] [-g group] [-m mode]\n"
958" [-o owner] file1 ... fileN directory\n"
959" or: %s -d [-v] [-g group] [-m mode] [-o owner] directory ...\n"
960" or: %s --help\n"
961" or: %s --version\n",
962 g_progname, g_progname, g_progname, g_progname, g_progname);
963 return EX_USAGE;
964}
965
966#ifdef USE_MMAP
967/*
968 * trymmap --
969 * return true (1) if mmap should be tried, false (0) if not.
970 */
971static int
972trymmap(int fd)
973{
974/*
975 * The ifdef is for bootstrapping - f_fstypename doesn't exist in
976 * pre-Lite2-merge systems.
977 */
978#ifdef MFSNAMELEN
979 struct statfs stfs;
980
981 if (nommap || fstatfs(fd, &stfs) != 0)
982 return (0);
983 if (strcmp(stfs.f_fstypename, "ufs") == 0 ||
984 strcmp(stfs.f_fstypename, "cd9660") == 0)
985 return (1);
986#endif
987 return (0);
988}
989#endif
990
991/* figures out where the last slash or colon is. */
992static char *
993last_slash(const char *path)
994{
995#if defined(__WIN32__) || defined(__WIN64__) || defined(__OS2__)
996 char *p = (char *)strrchr(path, '/');
997 if (p)
998 {
999 char *p2 = strrchr(p, '\\');
1000 if (p2)
1001 p = p2;
1002 }
1003 else
1004 {
1005 p = (char *)strrchr(path, '\\');
1006 if (!p && isalpha(path[0]) && path[1] == ':')
1007 p = (char *)&path[1];
1008 }
1009 return p;
1010#else
1011 return strrchr(path, '/');
1012#endif
1013}
1014
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