source: trunk/src/kmk/kmkbuiltin/install.c@ 1750

Last change on this file since 1750 was 1730, checked in by bird, 17 years ago

kmk_install: --[no-]ignore-perm-errors on chmod and chown. This defaults to true unless we're root.
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File size: 24.6 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#include "getopt.h"
76#ifdef __sun__
77# include "solfakes.h"
78#endif
79#ifdef _MSC_VER
80# include "mscfakes.h"
81#endif
82#include "kmkbuiltin.h"
83
84
85extern void * bsd_setmode(const char *p);
86extern mode_t bsd_getmode(const void *bbox, mode_t omode);
87
88#ifndef __unused
89# define __unused
90#endif
91
92#ifndef MAXBSIZE
93# define MAXBSIZE 0x20000
94#endif
95
96/* Bootstrap aid - this doesn't exist in most older releases */
97#ifndef MAP_FAILED
98#define MAP_FAILED ((void *)-1) /* from <sys/mman.h> */
99#endif
100
101#define MAX_CMP_SIZE (16 * 1024 * 1024)
102
103#define DIRECTORY 0x01 /* Tell install it's a directory. */
104#define SETFLAGS 0x02 /* Tell install to set flags. */
105#define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND)
106#define BACKUP_SUFFIX ".old"
107
108#ifndef O_BINARY
109# define O_BINARY 0
110#endif
111
112#ifndef EFTYPE
113# define EFTYPE EINVAL
114#endif
115
116#if defined(__WIN32__) || defined(__WIN64__) || defined(__OS2__)
117# define IS_SLASH(ch) ((ch) == '/' || (ch) == '\\')
118#else
119# define IS_SLASH(ch) ((ch) == '/')
120#endif
121
122static gid_t gid;
123static uid_t uid;
124static int dobackup, docompare, dodir, dopreserve, dostrip, nommap, safecopy, verbose;
125static mode_t mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
126static const char *suffix = BACKUP_SUFFIX;
127static int ignore_perm_errors;
128
129static struct option long_options[] =
130{
131 { "help", no_argument, 0, 261 },
132 { "version", no_argument, 0, 262 },
133 { "ignore-perm-errors", no_argument, 0, 263 },
134 { "no-ignore-perm-errors", no_argument, 0, 264 },
135 { 0, 0, 0, 0 },
136};
137
138
139static int copy(int, const char *, int, const char *, off_t);
140static int compare(int, const char *, size_t, int, const char *, size_t);
141static int create_newfile(const char *, int, struct stat *);
142static int create_tempfile(const char *, char *, size_t);
143static int install(const char *, const char *, u_long, u_int);
144static int install_dir(char *);
145static u_long numeric_id(const char *, const char *);
146static int strip(const char *);
147#ifdef USE_MMAP
148static int trymmap(int);
149#endif
150static int usage(FILE *);
151static char *last_slash(const char *);
152
153int
154kmk_builtin_install(int argc, char *argv[], char ** envp)
155{
156 struct stat from_sb, to_sb;
157 mode_t *set;
158 u_long fset = 0;
159 int ch, no_target;
160 u_int iflags;
161 char *flags;
162 const char *group, *owner, *to_name;
163 (void)envp;
164
165 /* reinitialize globals */
166 mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
167 suffix = BACKUP_SUFFIX;
168 gid = 0;
169 uid = 0;
170 dobackup = docompare = dodir = dopreserve = dostrip = nommap = safecopy = verbose = 0;
171 ignore_perm_errors = geteuid() != 0;
172
173 /* reset getopt and set progname. */
174 g_progname = argv[0];
175 opterr = 1;
176 optarg = NULL;
177 optopt = 0;
178 optind = 0; /* init */
179
180 iflags = 0;
181 group = owner = NULL;
182 while ((ch = getopt_long(argc, argv, "B:bCcdf:g:Mm:o:pSsv", long_options, NULL)) != -1)
183 switch(ch) {
184 case 'B':
185 suffix = optarg;
186 /* FALLTHROUGH */
187 case 'b':
188 dobackup = 1;
189 break;
190 case 'C':
191 docompare = 1;
192 break;
193 case 'c':
194 /* For backwards compatibility. */
195 break;
196 case 'd':
197 dodir = 1;
198 break;
199 case 'f':
200#ifdef UF_IMMUTABLE
201 flags = optarg;
202 if (strtofflags(&flags, &fset, NULL))
203 return errx(EX_USAGE, "%s: invalid flag", flags);
204 iflags |= SETFLAGS;
205#else
206 (void)flags;
207#endif
208 break;
209 case 'g':
210 group = optarg;
211 break;
212 case 'M':
213 nommap = 1;
214 break;
215 case 'm':
216 if (!(set = bsd_setmode(optarg)))
217 return errx(EX_USAGE, "invalid file mode: %s",
218 optarg);
219 mode = bsd_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 263:
243 ignore_perm_errors = 1;
244 break;
245 case 264:
246 ignore_perm_errors = 0;
247 break;
248 case '?':
249 default:
250 return usage(stderr);
251 }
252 argc -= optind;
253 argv += optind;
254
255 /* some options make no sense when creating directories */
256 if (dostrip && dodir) {
257 warnx("-d and -s may not be specified together");
258 return usage(stderr);
259 }
260
261 /* must have at least two arguments, except when creating directories */
262 if (argc == 0 || (argc == 1 && !dodir))
263 return usage(stderr);
264
265 /* need to make a temp copy so we can compare stripped version */
266 if (docompare && dostrip)
267 safecopy = 1;
268
269 /* get group and owner id's */
270 if (group != NULL) {
271#ifndef _MSC_VER
272 struct group *gp;
273 if ((gp = getgrnam(group)) != NULL)
274 gid = gp->gr_gid;
275 else
276#endif
277 {
278 gid = (gid_t)numeric_id(group, "group");
279 if (gid == (gid_t)-1)
280 return 1;
281 }
282 } else
283 gid = (gid_t)-1;
284
285 if (owner != NULL) {
286#ifndef _MSC_VER
287 struct passwd *pp;
288 if ((pp = getpwnam(owner)) != NULL)
289 uid = pp->pw_uid;
290 else
291#endif
292 {
293 uid = (uid_t)numeric_id(owner, "user");
294 if (uid == (uid_t)-1)
295 return 1;
296 }
297 } else
298 uid = (uid_t)-1;
299
300 if (dodir) {
301 for (; *argv != NULL; ++argv) {
302 int rc = install_dir(*argv);
303 if (rc)
304 return rc;
305 }
306 return EX_OK;
307 /* NOTREACHED */
308 }
309
310 no_target = stat(to_name = argv[argc - 1], &to_sb);
311 if (!no_target && S_ISDIR(to_sb.st_mode)) {
312 for (; *argv != to_name; ++argv) {
313 int rc = install(*argv, to_name, fset, iflags | DIRECTORY);
314 if (rc)
315 return rc;
316 }
317 return EX_OK;
318 }
319
320 /* can't do file1 file2 directory/file */
321 if (argc != 2) {
322 warnx("wrong number or types of arguments");
323 return usage(stderr);
324 }
325
326 if (!no_target) {
327 if (stat(*argv, &from_sb))
328 return err(EX_OSERR, "%s", *argv);
329 if (!S_ISREG(to_sb.st_mode)) {
330 errno = EFTYPE;
331 return err(EX_OSERR, "%s", to_name);
332 }
333 if (to_sb.st_dev == from_sb.st_dev &&
334 to_sb.st_dev != 0 &&
335 to_sb.st_ino == from_sb.st_ino &&
336 to_sb.st_ino != 0)
337 return errx(EX_USAGE,
338 "%s and %s are the same file", *argv, to_name);
339 }
340 return install(*argv, to_name, fset, iflags);
341}
342
343static u_long
344numeric_id(const char *name, const char *type)
345{
346 u_long val;
347 char *ep;
348
349 /*
350 * XXX
351 * We know that uid_t's and gid_t's are unsigned longs.
352 */
353 errno = 0;
354 val = strtoul(name, &ep, 10);
355 if (errno)
356 return err(-1, "%s", name);
357 if (*ep != '\0')
358 return errx(-1, "unknown %s %s", type, name);
359 return (val);
360}
361
362/*
363 * install --
364 * build a path name and install the file
365 */
366static int
367install(const char *from_name, const char *to_name, u_long fset, u_int flags)
368{
369 struct stat from_sb, temp_sb, to_sb;
370 struct timeval tvb[2];
371 int devnull, files_match, from_fd, serrno, target;
372 int tempcopy, temp_fd, to_fd;
373 char backup[MAXPATHLEN], *p, pathbuf[MAXPATHLEN], tempfile[MAXPATHLEN];
374 int rc = EX_OK;
375
376 files_match = 0;
377 from_fd = -1;
378 to_fd = -1;
379 temp_fd = -1;
380
381 /* If try to install NULL file to a directory, fails. */
382 if (flags & DIRECTORY
383#if defined(__EMX__) || defined(_MSC_VER)
384 || ( stricmp(from_name, _PATH_DEVNULL)
385 && stricmp(from_name, "nul")
386#ifdef __EMX__
387 && stricmp(from_name, "/dev/nul")
388#endif
389 )
390#else
391 || strcmp(from_name, _PATH_DEVNULL)
392#endif
393 ) {
394 if (stat(from_name, &from_sb))
395 return err(EX_OSERR, "%s", from_name);
396 if (!S_ISREG(from_sb.st_mode)) {
397 errno = EFTYPE;
398 return err(EX_OSERR, "%s", from_name);
399 }
400 /* Build the target path. */
401 if (flags & DIRECTORY) {
402 (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s",
403 to_name,
404 (p = last_slash(from_name)) ? ++p : from_name);
405 to_name = pathbuf;
406 }
407 devnull = 0;
408 } else {
409 devnull = 1;
410 }
411
412 target = stat(to_name, &to_sb) == 0;
413
414 /* Only install to regular files. */
415 if (target && !S_ISREG(to_sb.st_mode)) {
416 errno = EFTYPE;
417 warn("%s", to_name);
418 return EX_OK;
419 }
420
421 /* Only copy safe if the target exists. */
422 tempcopy = safecopy && target;
423
424 if (!devnull && (from_fd = open(from_name, O_RDONLY | O_BINARY, 0)) < 0)
425 return err(EX_OSERR, "%s", from_name);
426
427 /* If we don't strip, we can compare first. */
428 if (docompare && !dostrip && target) {
429 if ((to_fd = open(to_name, O_RDONLY | O_BINARY, 0)) < 0) {
430 rc = err(EX_OSERR, "%s", to_name);
431 goto l_done;
432 }
433 if (devnull)
434 files_match = to_sb.st_size == 0;
435 else
436 files_match = !(compare(from_fd, from_name,
437 (size_t)from_sb.st_size, to_fd,
438 to_name, (size_t)to_sb.st_size));
439
440 /* Close "to" file unless we match. */
441 if (!files_match) {
442 (void)close(to_fd);
443 to_fd = -1;
444 }
445 }
446
447 if (!files_match) {
448 if (tempcopy) {
449 to_fd = create_tempfile(to_name, tempfile,
450 sizeof(tempfile));
451 if (to_fd < 0) {
452 rc = err(EX_OSERR, "%s", tempfile);
453 goto l_done;
454 }
455 } else {
456 if ((to_fd = create_newfile(to_name, target,
457 &to_sb)) < 0) {
458 rc = err(EX_OSERR, "%s", to_name);
459 goto l_done;
460 }
461 if (verbose)
462 (void)printf("install: %s -> %s\n",
463 from_name, to_name);
464 }
465 if (!devnull) {
466 rc = copy(from_fd, from_name, to_fd,
467 tempcopy ? tempfile : to_name, from_sb.st_size);
468 if (rc)
469 goto l_done;
470 }
471 }
472
473 if (dostrip) {
474#if defined(__EMX__) || defined(_MSC_VER)
475 /* close before we strip. */
476 close(to_fd);
477 to_fd = -1;
478#endif
479 rc = strip(tempcopy ? tempfile : to_name);
480 if (rc)
481 goto l_done;
482
483 /*
484 * Re-open our fd on the target, in case we used a strip
485 * that does not work in-place -- like GNU binutils strip.
486 */
487#if !defined(__EMX__) && !defined(_MSC_VER)
488 close(to_fd);
489#endif
490 to_fd = open(tempcopy ? tempfile : to_name, O_RDONLY | O_BINARY, 0);
491 if (to_fd < 0) {
492 rc = err(EX_OSERR, "stripping %s", to_name);
493 goto l_done;
494 }
495 }
496
497 /*
498 * Compare the stripped temp file with the target.
499 */
500 if (docompare && dostrip && target) {
501 temp_fd = to_fd;
502
503 /* Re-open to_fd using the real target name. */
504 if ((to_fd = open(to_name, O_RDONLY | O_BINARY, 0)) < 0) {
505 rc = err(EX_OSERR, "%s", to_name);
506 goto l_done;
507 }
508
509 if (fstat(temp_fd, &temp_sb)) {
510 serrno = errno;
511 (void)unlink(tempfile);
512 errno = serrno;
513 rc = err(EX_OSERR, "%s", tempfile);
514 goto l_done;
515 }
516
517 if (compare(temp_fd, tempfile, (size_t)temp_sb.st_size, to_fd,
518 to_name, (size_t)to_sb.st_size) == 0) {
519 /*
520 * If target has more than one link we need to
521 * replace it in order to snap the extra links.
522 * Need to preserve target file times, though.
523 */
524#if !defined(_MSC_VER) && !defined(__EMX__)
525 if (to_sb.st_nlink != 1) {
526 tvb[0].tv_sec = to_sb.st_atime;
527 tvb[0].tv_usec = 0;
528 tvb[1].tv_sec = to_sb.st_mtime;
529 tvb[1].tv_usec = 0;
530 (void)utimes(tempfile, tvb);
531 } else
532#endif
533 {
534
535 files_match = 1;
536 (void)unlink(tempfile);
537 }
538 (void) close(temp_fd);
539 temp_fd = -1;
540 }
541 }
542
543 /*
544 * Move the new file into place if doing a safe copy
545 * and the files are different (or just not compared).
546 */
547 if (tempcopy && !files_match) {
548#ifdef UF_IMMUTABLE
549 /* Try to turn off the immutable bits. */
550 if (to_sb.st_flags & NOCHANGEBITS)
551 (void)chflags(to_name, to_sb.st_flags & ~NOCHANGEBITS);
552#endif
553 if (dobackup) {
554 if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s", to_name,
555 suffix) != strlen(to_name) + strlen(suffix)) {
556 unlink(tempfile);
557 rc = errx(EX_OSERR, "%s: backup filename too long",
558 to_name);
559 goto l_done;
560 }
561 if (verbose)
562 (void)printf("install: %s -> %s\n", to_name, backup);
563 if (rename(to_name, backup) < 0) {
564 serrno = errno;
565 unlink(tempfile);
566 errno = serrno;
567 rc = err(EX_OSERR, "rename: %s to %s", to_name,
568 backup);
569 goto l_done;
570 }
571 }
572 if (verbose)
573 (void)printf("install: %s -> %s\n", from_name, to_name);
574 if (rename(tempfile, to_name) < 0) {
575 serrno = errno;
576 unlink(tempfile);
577 errno = serrno;
578 rc = err(EX_OSERR, "rename: %s to %s",
579 tempfile, to_name);
580 goto l_done;
581 }
582
583 /* Re-open to_fd so we aren't hosed by the rename(2). */
584 (void) close(to_fd);
585 if ((to_fd = open(to_name, O_RDONLY | O_BINARY, 0)) < 0) {
586 rc = err(EX_OSERR, "%s", to_name);
587 goto l_done;
588 }
589 }
590
591 /*
592 * Preserve the timestamp of the source file if necessary.
593 */
594 if (dopreserve && !files_match && !devnull) {
595 tvb[0].tv_sec = from_sb.st_atime;
596 tvb[0].tv_usec = 0;
597 tvb[1].tv_sec = from_sb.st_mtime;
598 tvb[1].tv_usec = 0;
599 (void)utimes(to_name, tvb);
600 }
601
602 if (fstat(to_fd, &to_sb) == -1) {
603 serrno = errno;
604 (void)unlink(to_name);
605 errno = serrno;
606 rc = err(EX_OSERR, "%s", to_name);
607 goto l_done;
608 }
609
610 /*
611 * Set owner, group, mode for target; do the chown first,
612 * chown may lose the setuid bits.
613 */
614#ifdef UF_IMMUTABLE
615 if ((gid != (gid_t)-1 && gid != to_sb.st_gid) ||
616 (uid != (uid_t)-1 && uid != to_sb.st_uid) ||
617 (mode != (to_sb.st_mode & ALLPERMS))) {
618 /* Try to turn off the immutable bits. */
619 if (to_sb.st_flags & NOCHANGEBITS)
620 (void)fchflags(to_fd, to_sb.st_flags & ~NOCHANGEBITS);
621 }
622#endif
623
624 if ((gid != (gid_t)-1 && gid != to_sb.st_gid) ||
625 (uid != (uid_t)-1 && uid != to_sb.st_uid))
626 if (fchown(to_fd, uid, gid) == -1) {
627 if (errno == EPERM && ignore_perm_errors) {
628 warn("%s: ignoring chown uid=%d gid=%d failure", to_name, (int)uid, (int)gid);
629 } else {
630 serrno = errno;
631 (void)unlink(to_name);
632 errno = serrno;
633 rc = err(EX_OSERR,"%s: chown/chgrp", to_name);
634 goto l_done;
635 }
636 }
637
638 if (mode != (to_sb.st_mode & ALLPERMS))
639 if (fchmod(to_fd, mode)) {
640 serrno = errno;
641 if (serrno == EPERM && ignore_perm_errors) {
642 fchmod(to_fd, mode & (ALLPERMS & ~0007000));
643 errno = errno;
644 warn("%s: ignoring chmod 0%o failure", to_name, (int)(mode & ALLPERMS));
645 } else {
646 serrno = errno;
647 (void)unlink(to_name);
648 errno = serrno;
649 rc = err(EX_OSERR, "%s: chmod", to_name);
650 goto l_done;
651 }
652 }
653
654 /*
655 * If provided a set of flags, set them, otherwise, preserve the
656 * flags, except for the dump flag.
657 * NFS does not support flags. Ignore EOPNOTSUPP flags if we're just
658 * trying to turn off UF_NODUMP. If we're trying to set real flags,
659 * then warn if the the fs doesn't support it, otherwise fail.
660 */
661#ifdef UF_IMMUTABLE
662 if (!devnull && (flags & SETFLAGS ||
663 (from_sb.st_flags & ~UF_NODUMP) != to_sb.st_flags) &&
664 fchflags(to_fd,
665 flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) {
666 if (flags & SETFLAGS) {
667 if (errno == EOPNOTSUPP)
668 warn("%s: chflags", to_name);
669 else {
670 serrno = errno;
671 (void)unlink(to_name);
672 errno = serrno;
673 rc = err(EX_OSERR, "%s: chflags", to_name);
674 goto l_done;
675 }
676 }
677 }
678#endif
679
680l_done:
681 if (to_fd >= 0)
682 (void)close(to_fd);
683 if (temp_fd >= 0)
684 (void)close(temp_fd);
685 if (!devnull)
686 (void)close(from_fd);
687 return rc;
688}
689
690/*
691 * compare --
692 * compare two files; non-zero means files differ
693 */
694static int
695compare(int from_fd, const char *from_name __unused, size_t from_len,
696 int to_fd, const char *to_name __unused, size_t to_len)
697{
698 char *p, *q;
699 int rv;
700 int done_compare;
701
702 rv = 0;
703 if (from_len != to_len)
704 return 1;
705
706 if (from_len <= MAX_CMP_SIZE) {
707#ifdef USE_MMAP
708 done_compare = 0;
709 if (trymmap(from_fd) && trymmap(to_fd)) {
710 p = mmap(NULL, from_len, PROT_READ, MAP_SHARED, from_fd, (off_t)0);
711 if (p == (char *)MAP_FAILED)
712 goto out;
713 q = mmap(NULL, from_len, PROT_READ, MAP_SHARED, to_fd, (off_t)0);
714 if (q == (char *)MAP_FAILED) {
715 munmap(p, from_len);
716 goto out;
717 }
718
719 rv = memcmp(p, q, from_len);
720 munmap(p, from_len);
721 munmap(q, from_len);
722 done_compare = 1;
723 }
724 out:
725#else
726 (void)p; (void)q;
727 done_compare = 0;
728#endif
729 if (!done_compare) {
730 char buf1[MAXBSIZE];
731 char buf2[MAXBSIZE];
732 int n1, n2;
733
734 rv = 0;
735 lseek(from_fd, 0, SEEK_SET);
736 lseek(to_fd, 0, SEEK_SET);
737 while (rv == 0) {
738 n1 = read(from_fd, buf1, sizeof(buf1));
739 if (n1 == 0)
740 break; /* EOF */
741 else if (n1 > 0) {
742 n2 = read(to_fd, buf2, n1);
743 if (n2 == n1)
744 rv = memcmp(buf1, buf2, n1);
745 else
746 rv = 1; /* out of sync */
747 } else
748 rv = 1; /* read failure */
749 }
750 lseek(from_fd, 0, SEEK_SET);
751 lseek(to_fd, 0, SEEK_SET);
752 }
753 } else
754 rv = 1; /* don't bother in this case */
755
756 return rv;
757}
758
759/*
760 * create_tempfile --
761 * create a temporary file based on path and open it
762 */
763int
764create_tempfile(const char *path, char *temp, size_t tsize)
765{
766 char *p;
767
768 (void)strncpy(temp, path, tsize);
769 temp[tsize - 1] = '\0';
770 if ((p = last_slash(temp)) != NULL)
771 p++;
772 else
773 p = temp;
774 (void)strncpy(p, "INS@XXXX", &temp[tsize - 1] - p);
775 temp[tsize - 1] = '\0';
776 return (mkstemp(temp));
777}
778
779/*
780 * create_newfile --
781 * create a new file, overwriting an existing one if necessary
782 */
783int
784create_newfile(const char *path, int target, struct stat *sbp)
785{
786 char backup[MAXPATHLEN];
787 int saved_errno = 0;
788 int newfd;
789
790 if (target) {
791 /*
792 * Unlink now... avoid ETXTBSY errors later. Try to turn
793 * off the append/immutable bits -- if we fail, go ahead,
794 * it might work.
795 */
796#ifdef UF_IMMUTABLE
797 if (sbp->st_flags & NOCHANGEBITS)
798 (void)chflags(path, sbp->st_flags & ~NOCHANGEBITS);
799#endif
800
801 if (dobackup) {
802 if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s",
803 path, suffix) != strlen(path) + strlen(suffix)) {
804 errx(EX_OSERR, "%s: backup filename too long",
805 path);
806 errno = ENAMETOOLONG;
807 return -1;
808 }
809 (void)snprintf(backup, MAXPATHLEN, "%s%s",
810 path, suffix);
811 if (verbose)
812 (void)printf("install: %s -> %s\n",
813 path, backup);
814 if (rename(path, backup) < 0) {
815 err(EX_OSERR, "rename: %s to %s", path, backup);
816 return -1;
817 }
818 } else
819 if (unlink(path) < 0)
820 saved_errno = errno;
821 }
822
823 newfd = open(path, O_CREAT | O_RDWR | O_TRUNC | O_BINARY, S_IRUSR | S_IWUSR);
824 if (newfd < 0 && saved_errno != 0)
825 errno = saved_errno;
826 return newfd;
827}
828
829/*
830 * copy --
831 * copy from one file to another
832 */
833static int
834copy(int from_fd, const char *from_name, int to_fd, const char *to_name,
835 off_t size)
836{
837 int nr, nw;
838 int serrno;
839 char *p, buf[MAXBSIZE];
840 int done_copy;
841
842 /* Rewind file descriptors. */
843 if (lseek(from_fd, (off_t)0, SEEK_SET) == (off_t)-1)
844 return err(EX_OSERR, "lseek: %s", from_name);
845 if (lseek(to_fd, (off_t)0, SEEK_SET) == (off_t)-1)
846 return err(EX_OSERR, "lseek: %s", to_name);
847
848 /*
849 * Mmap and write if less than 8M (the limit is so we don't totally
850 * trash memory on big files. This is really a minor hack, but it
851 * wins some CPU back.
852 */
853 done_copy = 0;
854#ifdef USE_MMAP
855 if (size <= 8 * 1048576 && trymmap(from_fd) &&
856 (p = mmap(NULL, (size_t)size, PROT_READ, MAP_SHARED,
857 from_fd, (off_t)0)) != (char *)MAP_FAILED) {
858 if ((nw = write(to_fd, p, size)) != size) {
859 serrno = errno;
860 (void)unlink(to_name);
861 errno = nw > 0 ? EIO : serrno;
862 err(EX_OSERR, "%s", to_name);
863 }
864 done_copy = 1;
865 }
866#else
867 (void)p; (void)size;
868#endif
869 if (!done_copy) {
870 while ((nr = read(from_fd, buf, sizeof(buf))) > 0)
871 if ((nw = write(to_fd, buf, nr)) != nr) {
872 serrno = errno;
873 (void)unlink(to_name);
874 errno = nw > 0 ? EIO : serrno;
875 return err(EX_OSERR, "%s", to_name);
876 }
877 if (nr != 0) {
878 serrno = errno;
879 (void)unlink(to_name);
880 errno = serrno;
881 return err(EX_OSERR, "%s", from_name);
882 }
883 }
884 return EX_OK;
885}
886
887/*
888 * strip --
889 * use strip(1) to strip the target file
890 */
891static int
892strip(const char *to_name)
893{
894#if defined(__EMX__) || defined(_MSC_VER)
895 const char *stripbin = getenv("STRIPBIN");
896 if (stripbin == NULL)
897 stripbin = "strip";
898 return spawnlp(P_WAIT, stripbin, stripbin, to_name, NULL);
899#else
900 const char *stripbin;
901 int serrno, status;
902 pid_t pid;
903
904 pid = fork();
905 switch (pid) {
906 case -1:
907 serrno = errno;
908 (void)unlink(to_name);
909 errno = serrno;
910 return err(EX_TEMPFAIL, "fork");
911 case 0:
912 stripbin = getenv("STRIPBIN");
913 if (stripbin == NULL)
914 stripbin = "strip";
915 execlp(stripbin, stripbin, to_name, (char *)NULL);
916 err(EX_OSERR, "exec(%s)", stripbin);
917 exit(EX_OSERR);
918 default:
919 if (waitpid(pid, &status, 0) == -1 || status) {
920 serrno = errno;
921 (void)unlink(to_name);
922 errno = serrno;
923 return err(EX_SOFTWARE, "waitpid");
924 /* NOTREACHED */
925 }
926 }
927 return 0;
928#endif
929}
930
931/*
932 * install_dir --
933 * build directory heirarchy
934 */
935static int
936install_dir(char *path)
937{
938 char *p;
939 struct stat sb;
940 int ch;
941
942 for (p = path;; ++p)
943 if (!*p || (p != path && IS_SLASH(*p))) {
944 ch = *p;
945 *p = '\0';
946 if (stat(path, &sb)) {
947 if (errno != ENOENT || mkdir(path, 0755) < 0) {
948 return err(EX_OSERR, "mkdir %s", path);
949 /* NOTREACHED */
950 } else if (verbose)
951 (void)printf("install: mkdir %s\n",
952 path);
953 } else if (!S_ISDIR(sb.st_mode))
954 return errx(EX_OSERR, "%s exists but is not a directory", path);
955 if (!(*p = ch))
956 break;
957 }
958
959 if ((gid != (gid_t)-1 || uid != (uid_t)-1) && chown(path, uid, gid))
960 warn("chown %u:%u %s", uid, gid, path);
961 if (chmod(path, mode))
962 warn("chmod %o %s", mode, path);
963 return EX_OK;
964}
965
966/*
967 * usage --
968 * print a usage message and die
969 */
970static int
971usage(FILE *pf)
972{
973 fprintf(pf,
974"usage: %s [-bCcpSsv] [--[no-]ignore-perm-errors] [-B suffix] [-f flags]\n"
975" [-g group] [-m mode] [-o owner] file1 file2\n"
976" or: %s [-bCcpSsv] [--[no-]ignore-perm-errors] [-B suffix] [-f flags]\n"
977" [-g group] [-m mode] [-o owner] file1 ... fileN directory\n"
978" or: %s -d [-v] [-g group] [-m mode] [-o owner] directory ...\n"
979" or: %s --help\n"
980" or: %s --version\n",
981 g_progname, g_progname, g_progname, g_progname, g_progname);
982 return EX_USAGE;
983}
984
985#ifdef USE_MMAP
986/*
987 * trymmap --
988 * return true (1) if mmap should be tried, false (0) if not.
989 */
990static int
991trymmap(int fd)
992{
993/*
994 * The ifdef is for bootstrapping - f_fstypename doesn't exist in
995 * pre-Lite2-merge systems.
996 */
997#ifdef MFSNAMELEN
998 struct statfs stfs;
999
1000 if (nommap || fstatfs(fd, &stfs) != 0)
1001 return (0);
1002 if (strcmp(stfs.f_fstypename, "ufs") == 0 ||
1003 strcmp(stfs.f_fstypename, "cd9660") == 0)
1004 return (1);
1005#endif
1006 return (0);
1007}
1008#endif
1009
1010/* figures out where the last slash or colon is. */
1011static char *
1012last_slash(const char *path)
1013{
1014#if defined(__WIN32__) || defined(__WIN64__) || defined(__OS2__)
1015 char *p = (char *)strrchr(path, '/');
1016 if (p)
1017 {
1018 char *p2 = strrchr(p, '\\');
1019 if (p2)
1020 p = p2;
1021 }
1022 else
1023 {
1024 p = (char *)strrchr(path, '\\');
1025 if (!p && isalpha(path[0]) && path[1] == ':')
1026 p = (char *)&path[1];
1027 }
1028 return p;
1029#else
1030 return strrchr(path, '/');
1031#endif
1032}
1033
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