install.c@ 1710

最後變更在這個檔案從1710是 1710,由 bird 提交於 17 年前
kmk: Made chmod build on windows. Some cleanup of the bsdisms.
屬性 svn:eol-style 設為 `native` 屬性 svn:keywords 設為 `Author Date Id Revision`
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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
35	static 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
42	static 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
85	extern void * bsd_setmode(const char *p);
86	extern 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
122	static gid_t gid;
123	static uid_t uid;
124	static int dobackup, docompare, dodir, dopreserve, dostrip, nommap, safecopy, verbose;
125	static mode_t mode = S_IRWXU \| S_IRGRP \| S_IXGRP \| S_IROTH \| S_IXOTH;
126	static const char *suffix = BACKUP_SUFFIX;
127
128	static struct option long_options[] =
129	{
130	{ "help", no_argument, 0, 261 },
131	{ "version", no_argument, 0, 262 },
132	{ 0, 0, 0, 0 },
133	};
134
135
136	static int copy(int, const char , int, const char , off_t);
137	static int compare(int, const char , size_t, int, const char , size_t);
138	static int create_newfile(const char , int, struct stat );
139	static int create_tempfile(const char , char , size_t);
140	static int install(const char , const char , u_long, u_int);
141	static int install_dir(char *);
142	static u_long numeric_id(const char , const char );
143	static int strip(const char *);
144	#ifdef USE_MMAP
145	static int trymmap(int);
146	#endif
147	static int usage(FILE *);
148	static char last_slash(const char );
149
150	int
151	kmk_builtin_install(int argc, char argv[], char *envp)
152	{
153	struct stat from_sb, to_sb;
154	mode_t *set;
155	u_long fset = 0;
156	int ch, no_target;
157	u_int iflags;
158	char *flags;
159	const char group, owner, *to_name;
160
161	/* reinitialize globals */
162	mode = S_IRWXU \| S_IRGRP \| S_IXGRP \| S_IROTH \| S_IXOTH;
163	suffix = BACKUP_SUFFIX;
164	gid = 0;
165	uid = 0;
166	dobackup = docompare = dodir = dopreserve = dostrip = nommap = safecopy = verbose = 0;
167
168	/* reset getopt and set progname. */
169	g_progname = argv[0];
170	opterr = 1;
171	optarg = NULL;
172	optopt = 0;
173	optind = 0; /* init */
174
175	iflags = 0;
176	group = owner = NULL;
177	while ((ch = getopt_long(argc, argv, "B:bCcdf:g:Mm:o:pSsv", long_options, NULL)) != -1)
178	switch(ch) {
179	case 'B':
180	suffix = optarg;
181	/* FALLTHROUGH */
182	case 'b':
183	dobackup = 1;
184	break;
185	case 'C':
186	docompare = 1;
187	break;
188	case 'c':
189	/* For backwards compatibility. */
190	break;
191	case 'd':
192	dodir = 1;
193	break;
194	case 'f':
195	#ifdef UF_IMMUTABLE
196	flags = optarg;
197	if (strtofflags(&flags, &fset, NULL))
198	return errx(EX_USAGE, "%s: invalid flag", flags);
199	iflags \|= SETFLAGS;
200	#else
201	(void)flags;
202	#endif
203	break;
204	case 'g':
205	group = optarg;
206	break;
207	case 'M':
208	nommap = 1;
209	break;
210	case 'm':
211	if (!(set = bsd_setmode(optarg)))
212	return errx(EX_USAGE, "invalid file mode: %s",
213	optarg);
214	mode = bsd_getmode(set, 0);
215	free(set);
216	break;
217	case 'o':
218	owner = optarg;
219	break;
220	case 'p':
221	docompare = dopreserve = 1;
222	break;
223	case 'S':
224	safecopy = 1;
225	break;
226	case 's':
227	dostrip = 1;
228	break;
229	case 'v':
230	verbose = 1;
231	break;
232	case 261:
233	usage(stdout);
234	return 0;
235	case 262:
236	return kbuild_version(argv[0]);
237	case '?':
238	default:
239	return usage(stderr);
240	}
241	argc -= optind;
242	argv += optind;
243
244	/* some options make no sense when creating directories */
245	if (dostrip && dodir) {
246	warnx("-d and -s may not be specified together");
247	return usage(stderr);
248	}
249
250	/* must have at least two arguments, except when creating directories */
251	if (argc == 0 \|\| (argc == 1 && !dodir))
252	return usage(stderr);
253
254	/* need to make a temp copy so we can compare stripped version */
255	if (docompare && dostrip)
256	safecopy = 1;
257
258	/* get group and owner id's */
259	if (group != NULL) {
260	#ifndef _MSC_VER
261	struct group *gp;
262	if ((gp = getgrnam(group)) != NULL)
263	gid = gp->gr_gid;
264	else
265	#endif
266	{
267	gid = (gid_t)numeric_id(group, "group");
268	if (gid == (gid_t)-1)
269	return 1;
270	}
271	} else
272	gid = (gid_t)-1;
273
274	if (owner != NULL) {
275	#ifndef _MSC_VER
276	struct passwd *pp;
277	if ((pp = getpwnam(owner)) != NULL)
278	uid = pp->pw_uid;
279	else
280	#endif
281	{
282	uid = (uid_t)numeric_id(owner, "user");
283	if (uid == (uid_t)-1)
284	return 1;
285	}
286	} else
287	uid = (uid_t)-1;
288
289	if (dodir) {
290	for (; *argv != NULL; ++argv) {
291	int rc = install_dir(*argv);
292	if (rc)
293	return rc;
294	}
295	return EX_OK;
296	/* NOTREACHED */
297	}
298
299	no_target = stat(to_name = argv[argc - 1], &to_sb);
300	if (!no_target && S_ISDIR(to_sb.st_mode)) {
301	for (; *argv != to_name; ++argv) {
302	int rc = install(*argv, to_name, fset, iflags \| DIRECTORY);
303	if (rc)
304	return rc;
305	}
306	return EX_OK;
307	}
308
309	/* can't do file1 file2 directory/file */
310	if (argc != 2) {
311	warnx("wrong number or types of arguments");
312	return usage(stderr);
313	}
314
315	if (!no_target) {
316	if (stat(*argv, &from_sb))
317	return err(EX_OSERR, "%s", *argv);
318	if (!S_ISREG(to_sb.st_mode)) {
319	errno = EFTYPE;
320	return err(EX_OSERR, "%s", to_name);
321	}
322	if (to_sb.st_dev == from_sb.st_dev &&
323	to_sb.st_dev != 0 &&
324	to_sb.st_ino == from_sb.st_ino &&
325	to_sb.st_ino != 0)
326	return errx(EX_USAGE,
327	"%s and %s are the same file", *argv, to_name);
328	}
329	return install(*argv, to_name, fset, iflags);
330	}
331
332	static u_long
333	numeric_id(const char name, const char type)
334	{
335	u_long val;
336	char *ep;
337
338	/*
339	* XXX
340	* We know that uid_t's and gid_t's are unsigned longs.
341	*/
342	errno = 0;
343	val = strtoul(name, &ep, 10);
344	if (errno)
345	return err(-1, "%s", name);
346	if (*ep != '\0')
347	return errx(-1, "unknown %s %s", type, name);
348	return (val);
349	}
350
351	/*
352	* install --
353	* build a path name and install the file
354	*/
355	static int
356	install(const char from_name, const char to_name, u_long fset, u_int flags)
357	{
358	struct stat from_sb, temp_sb, to_sb;
359	struct timeval tvb[2];
360	int devnull, files_match, from_fd, serrno, target;
361	int tempcopy, temp_fd, to_fd;
362	char backup[MAXPATHLEN], *p, pathbuf[MAXPATHLEN], tempfile[MAXPATHLEN];
363	int rc = EX_OK;
364
365	files_match = 0;
366	from_fd = -1;
367	to_fd = -1;
368	temp_fd = -1;
369
370	/* If try to install NULL file to a directory, fails. */
371	if (flags & DIRECTORY
372	#if defined(__EMX__) \|\| defined(_MSC_VER)
373	\|\| ( stricmp(from_name, _PATH_DEVNULL)
374	&& stricmp(from_name, "nul")
375	#ifdef __EMX__
376	&& stricmp(from_name, "/dev/nul")
377	#endif
378	)
379	#else
380	\|\| strcmp(from_name, _PATH_DEVNULL)
381	#endif
382	) {
383	if (stat(from_name, &from_sb))
384	return err(EX_OSERR, "%s", from_name);
385	if (!S_ISREG(from_sb.st_mode)) {
386	errno = EFTYPE;
387	return err(EX_OSERR, "%s", from_name);
388	}
389	/* Build the target path. */
390	if (flags & DIRECTORY) {
391	(void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s",
392	to_name,
393	(p = last_slash(from_name)) ? ++p : from_name);
394	to_name = pathbuf;
395	}
396	devnull = 0;
397	} else {
398	devnull = 1;
399	}
400
401	target = stat(to_name, &to_sb) == 0;
402
403	/* Only install to regular files. */
404	if (target && !S_ISREG(to_sb.st_mode)) {
405	errno = EFTYPE;
406	warn("%s", to_name);
407	return EX_OK;
408	}
409
410	/* Only copy safe if the target exists. */
411	tempcopy = safecopy && target;
412
413	if (!devnull && (from_fd = open(from_name, O_RDONLY \| O_BINARY, 0)) < 0)
414	return err(EX_OSERR, "%s", from_name);
415
416	/* If we don't strip, we can compare first. */
417	if (docompare && !dostrip && target) {
418	if ((to_fd = open(to_name, O_RDONLY \| O_BINARY, 0)) < 0) {
419	rc = err(EX_OSERR, "%s", to_name);
420	goto l_done;
421	}
422	if (devnull)
423	files_match = to_sb.st_size == 0;
424	else
425	files_match = !(compare(from_fd, from_name,
426	(size_t)from_sb.st_size, to_fd,
427	to_name, (size_t)to_sb.st_size));
428
429	/* Close "to" file unless we match. */
430	if (!files_match) {
431	(void)close(to_fd);
432	to_fd = -1;
433	}
434	}
435
436	if (!files_match) {
437	if (tempcopy) {
438	to_fd = create_tempfile(to_name, tempfile,
439	sizeof(tempfile));
440	if (to_fd < 0) {
441	rc = err(EX_OSERR, "%s", tempfile);
442	goto l_done;
443	}
444	} else {
445	if ((to_fd = create_newfile(to_name, target,
446	&to_sb)) < 0) {
447	rc = err(EX_OSERR, "%s", to_name);
448	goto l_done;
449	}
450	if (verbose)
451	(void)printf("install: %s -> %s\n",
452	from_name, to_name);
453	}
454	if (!devnull) {
455	rc = copy(from_fd, from_name, to_fd,
456	tempcopy ? tempfile : to_name, from_sb.st_size);
457	if (rc)
458	goto l_done;
459	}
460	}
461
462	if (dostrip) {
463	#if defined(__EMX__) \|\| defined(_MSC_VER)
464	/* close before we strip. */
465	close(to_fd);
466	to_fd = -1;
467	#endif
468	rc = strip(tempcopy ? tempfile : to_name);
469	if (rc)
470	goto l_done;
471
472	/*
473	* Re-open our fd on the target, in case we used a strip
474	* that does not work in-place -- like GNU binutils strip.
475	*/
476	#if !defined(__EMX__) && !defined(_MSC_VER)
477	close(to_fd);
478	#endif
479	to_fd = open(tempcopy ? tempfile : to_name, O_RDONLY \| O_BINARY, 0);
480	if (to_fd < 0) {
481	rc = err(EX_OSERR, "stripping %s", to_name);
482	goto l_done;
483	}
484	}
485
486	/*
487	* Compare the stripped temp file with the target.
488	*/
489	if (docompare && dostrip && target) {
490	temp_fd = to_fd;
491
492	/* Re-open to_fd using the real target name. */
493	if ((to_fd = open(to_name, O_RDONLY \| O_BINARY, 0)) < 0) {
494	rc = err(EX_OSERR, "%s", to_name);
495	goto l_done;
496	}
497
498	if (fstat(temp_fd, &temp_sb)) {
499	serrno = errno;
500	(void)unlink(tempfile);
501	errno = serrno;
502	rc = err(EX_OSERR, "%s", tempfile);
503	goto l_done;
504	}
505
506	if (compare(temp_fd, tempfile, (size_t)temp_sb.st_size, to_fd,
507	to_name, (size_t)to_sb.st_size) == 0) {
508	/*
509	* If target has more than one link we need to
510	* replace it in order to snap the extra links.
511	* Need to preserve target file times, though.
512	*/
513	#if !defined(_MSC_VER) && !defined(__EMX__)
514	if (to_sb.st_nlink != 1) {
515	tvb[0].tv_sec = to_sb.st_atime;
516	tvb[0].tv_usec = 0;
517	tvb[1].tv_sec = to_sb.st_mtime;
518	tvb[1].tv_usec = 0;
519	(void)utimes(tempfile, tvb);
520	} else
521	#endif
522	{
523
524	files_match = 1;
525	(void)unlink(tempfile);
526	}
527	(void) close(temp_fd);
528	temp_fd = -1;
529	}
530	}
531
532	/*
533	* Move the new file into place if doing a safe copy
534	* and the files are different (or just not compared).
535	*/
536	if (tempcopy && !files_match) {
537	#ifdef UF_IMMUTABLE
538	/* Try to turn off the immutable bits. */
539	if (to_sb.st_flags & NOCHANGEBITS)
540	(void)chflags(to_name, to_sb.st_flags & ~NOCHANGEBITS);
541	#endif
542	if (dobackup) {
543	if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s", to_name,
544	suffix) != strlen(to_name) + strlen(suffix)) {
545	unlink(tempfile);
546	rc = errx(EX_OSERR, "%s: backup filename too long",
547	to_name);
548	goto l_done;
549	}
550	if (verbose)
551	(void)printf("install: %s -> %s\n", to_name, backup);
552	if (rename(to_name, backup) < 0) {
553	serrno = errno;
554	unlink(tempfile);
555	errno = serrno;
556	rc = err(EX_OSERR, "rename: %s to %s", to_name,
557	backup);
558	goto l_done;
559	}
560	}
561	if (verbose)
562	(void)printf("install: %s -> %s\n", from_name, to_name);
563	if (rename(tempfile, to_name) < 0) {
564	serrno = errno;
565	unlink(tempfile);
566	errno = serrno;
567	rc = err(EX_OSERR, "rename: %s to %s",
568	tempfile, to_name);
569	goto l_done;
570	}
571
572	/* Re-open to_fd so we aren't hosed by the rename(2). */
573	(void) close(to_fd);
574	if ((to_fd = open(to_name, O_RDONLY \| O_BINARY, 0)) < 0) {
575	rc = err(EX_OSERR, "%s", to_name);
576	goto l_done;
577	}
578	}
579
580	/*
581	* Preserve the timestamp of the source file if necessary.
582	*/
583	if (dopreserve && !files_match && !devnull) {
584	tvb[0].tv_sec = from_sb.st_atime;
585	tvb[0].tv_usec = 0;
586	tvb[1].tv_sec = from_sb.st_mtime;
587	tvb[1].tv_usec = 0;
588	(void)utimes(to_name, tvb);
589	}
590
591	if (fstat(to_fd, &to_sb) == -1) {
592	serrno = errno;
593	(void)unlink(to_name);
594	errno = serrno;
595	rc = err(EX_OSERR, "%s", to_name);
596	goto l_done;
597	}
598
599	/*
600	* Set owner, group, mode for target; do the chown first,
601	* chown may lose the setuid bits.
602	*/
603	#ifdef UF_IMMUTABLE
604	if ((gid != (gid_t)-1 && gid != to_sb.st_gid) \|\|
605	(uid != (uid_t)-1 && uid != to_sb.st_uid) \|\|
606	(mode != (to_sb.st_mode & ALLPERMS))) {
607	/* Try to turn off the immutable bits. */
608	if (to_sb.st_flags & NOCHANGEBITS)
609	(void)fchflags(to_fd, to_sb.st_flags & ~NOCHANGEBITS);
610	}
611	#endif
612
613	if ((gid != (gid_t)-1 && gid != to_sb.st_gid) \|\|
614	(uid != (uid_t)-1 && uid != to_sb.st_uid))
615	if (fchown(to_fd, uid, gid) == -1) {
616	serrno = errno;
617	(void)unlink(to_name);
618	errno = serrno;
619	rc = err(EX_OSERR,"%s: chown/chgrp", to_name);
620	goto l_done;
621	}
622
623	if (mode != (to_sb.st_mode & ALLPERMS))
624	if (fchmod(to_fd, mode)) {
625	serrno = errno;
626	(void)unlink(to_name);
627	errno = serrno;
628	rc = err(EX_OSERR, "%s: chmod", to_name);
629	goto l_done;
630	}
631
632	/*
633	* If provided a set of flags, set them, otherwise, preserve the
634	* flags, except for the dump flag.
635	* NFS does not support flags. Ignore EOPNOTSUPP flags if we're just
636	* trying to turn off UF_NODUMP. If we're trying to set real flags,
637	* then warn if the the fs doesn't support it, otherwise fail.
638	*/
639	#ifdef UF_IMMUTABLE
640	if (!devnull && (flags & SETFLAGS \|\|
641	(from_sb.st_flags & ~UF_NODUMP) != to_sb.st_flags) &&
642	fchflags(to_fd,
643	flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) {
644	if (flags & SETFLAGS) {
645	if (errno == EOPNOTSUPP)
646	warn("%s: chflags", to_name);
647	else {
648	serrno = errno;
649	(void)unlink(to_name);
650	errno = serrno;
651	rc = err(EX_OSERR, "%s: chflags", to_name);
652	goto l_done;
653	}
654	}
655	}
656	#endif
657
658	l_done:
659	if (to_fd >= 0)
660	(void)close(to_fd);
661	if (temp_fd >= 0)
662	(void)close(temp_fd);
663	if (!devnull)
664	(void)close(from_fd);
665	return rc;
666	}
667
668	/*
669	* compare --
670	* compare two files; non-zero means files differ
671	*/
672	static int
673	compare(int from_fd, const char *from_name __unused, size_t from_len,
674	int to_fd, const char *to_name __unused, size_t to_len)
675	{
676	char p, q;
677	int rv;
678	int done_compare;
679
680	rv = 0;
681	if (from_len != to_len)
682	return 1;
683
684	if (from_len <= MAX_CMP_SIZE) {
685	#ifdef USE_MMAP
686	done_compare = 0;
687	if (trymmap(from_fd) && trymmap(to_fd)) {
688	p = mmap(NULL, from_len, PROT_READ, MAP_SHARED, from_fd, (off_t)0);
689	if (p == (char *)MAP_FAILED)
690	goto out;
691	q = mmap(NULL, from_len, PROT_READ, MAP_SHARED, to_fd, (off_t)0);
692	if (q == (char *)MAP_FAILED) {
693	munmap(p, from_len);
694	goto out;
695	}
696
697	rv = memcmp(p, q, from_len);
698	munmap(p, from_len);
699	munmap(q, from_len);
700	done_compare = 1;
701	}
702	out:
703	#else
704	(void)p; (void)q;
705	done_compare = 0;
706	#endif
707	if (!done_compare) {
708	char buf1[MAXBSIZE];
709	char buf2[MAXBSIZE];
710	int n1, n2;
711
712	rv = 0;
713	lseek(from_fd, 0, SEEK_SET);
714	lseek(to_fd, 0, SEEK_SET);
715	while (rv == 0) {
716	n1 = read(from_fd, buf1, sizeof(buf1));
717	if (n1 == 0)
718	break; /* EOF */
719	else if (n1 > 0) {
720	n2 = read(to_fd, buf2, n1);
721	if (n2 == n1)
722	rv = memcmp(buf1, buf2, n1);
723	else
724	rv = 1; /* out of sync */
725	} else
726	rv = 1; /* read failure */
727	}
728	lseek(from_fd, 0, SEEK_SET);
729	lseek(to_fd, 0, SEEK_SET);
730	}
731	} else
732	rv = 1; /* don't bother in this case */
733
734	return rv;
735	}
736
737	/*
738	* create_tempfile --
739	* create a temporary file based on path and open it
740	*/
741	int
742	create_tempfile(const char path, char temp, size_t tsize)
743	{
744	char *p;
745
746	(void)strncpy(temp, path, tsize);
747	temp[tsize - 1] = '\0';
748	if ((p = last_slash(temp)) != NULL)
749	p++;
750	else
751	p = temp;
752	(void)strncpy(p, "INS@XXXX", &temp[tsize - 1] - p);
753	temp[tsize - 1] = '\0';
754	return (mkstemp(temp));
755	}
756
757	/*
758	* create_newfile --
759	* create a new file, overwriting an existing one if necessary
760	*/
761	int
762	create_newfile(const char path, int target, struct stat sbp)
763	{
764	char backup[MAXPATHLEN];
765	int saved_errno = 0;
766	int newfd;
767
768	if (target) {
769	/*
770	* Unlink now... avoid ETXTBSY errors later. Try to turn
771	* off the append/immutable bits -- if we fail, go ahead,
772	* it might work.
773	*/
774	#ifdef UF_IMMUTABLE
775	if (sbp->st_flags & NOCHANGEBITS)
776	(void)chflags(path, sbp->st_flags & ~NOCHANGEBITS);
777	#endif
778
779	if (dobackup) {
780	if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s",
781	path, suffix) != strlen(path) + strlen(suffix)) {
782	errx(EX_OSERR, "%s: backup filename too long",
783	path);
784	errno = ENAMETOOLONG;
785	return -1;
786	}
787	(void)snprintf(backup, MAXPATHLEN, "%s%s",
788	path, suffix);
789	if (verbose)
790	(void)printf("install: %s -> %s\n",
791	path, backup);
792	if (rename(path, backup) < 0) {
793	err(EX_OSERR, "rename: %s to %s", path, backup);
794	return -1;
795	}
796	} else
797	if (unlink(path) < 0)
798	saved_errno = errno;
799	}
800
801	newfd = open(path, O_CREAT \| O_RDWR \| O_TRUNC \| O_BINARY, S_IRUSR \| S_IWUSR);
802	if (newfd < 0 && saved_errno != 0)
803	errno = saved_errno;
804	return newfd;
805	}
806
807	/*
808	* copy --
809	* copy from one file to another
810	*/
811	static int
812	copy(int from_fd, const char from_name, int to_fd, const char to_name,
813	off_t size)
814	{
815	int nr, nw;
816	int serrno;
817	char *p, buf[MAXBSIZE];
818	int done_copy;
819
820	/* Rewind file descriptors. */
821	if (lseek(from_fd, (off_t)0, SEEK_SET) == (off_t)-1)
822	return err(EX_OSERR, "lseek: %s", from_name);
823	if (lseek(to_fd, (off_t)0, SEEK_SET) == (off_t)-1)
824	return err(EX_OSERR, "lseek: %s", to_name);
825
826	/*
827	* Mmap and write if less than 8M (the limit is so we don't totally
828	* trash memory on big files. This is really a minor hack, but it
829	* wins some CPU back.
830	*/
831	done_copy = 0;
832	#ifdef USE_MMAP
833	if (size <= 8 * 1048576 && trymmap(from_fd) &&
834	(p = mmap(NULL, (size_t)size, PROT_READ, MAP_SHARED,
835	from_fd, (off_t)0)) != (char *)MAP_FAILED) {
836	if ((nw = write(to_fd, p, size)) != size) {
837	serrno = errno;
838	(void)unlink(to_name);
839	errno = nw > 0 ? EIO : serrno;
840	err(EX_OSERR, "%s", to_name);
841	}
842	done_copy = 1;
843	}
844	#else
845	(void)p;
846	#endif
847	if (!done_copy) {
848	while ((nr = read(from_fd, buf, sizeof(buf))) > 0)
849	if ((nw = write(to_fd, buf, nr)) != nr) {
850	serrno = errno;
851	(void)unlink(to_name);
852	errno = nw > 0 ? EIO : serrno;
853	return err(EX_OSERR, "%s", to_name);
854	}
855	if (nr != 0) {
856	serrno = errno;
857	(void)unlink(to_name);
858	errno = serrno;
859	return err(EX_OSERR, "%s", from_name);
860	}
861	}
862	return EX_OK;
863	}
864
865	/*
866	* strip --
867	* use strip(1) to strip the target file
868	*/
869	static int
870	strip(const char *to_name)
871	{
872	#if defined(__EMX__) \|\| defined(_MSC_VER)
873	const char *stripbin = getenv("STRIPBIN");
874	if (stripbin == NULL)
875	stripbin = "strip";
876	return spawnlp(P_WAIT, stripbin, stripbin, to_name, NULL);
877	#else
878	const char *stripbin;
879	int serrno, status;
880	pid_t pid;
881
882	pid = fork();
883	switch (pid) {
884	case -1:
885	serrno = errno;
886	(void)unlink(to_name);
887	errno = serrno;
888	return err(EX_TEMPFAIL, "fork");
889	case 0:
890	stripbin = getenv("STRIPBIN");
891	if (stripbin == NULL)
892	stripbin = "strip";
893	execlp(stripbin, stripbin, to_name, (char *)NULL);
894	err(EX_OSERR, "exec(%s)", stripbin);
895	exit(EX_OSERR);
896	default:
897	if (waitpid(pid, &status, 0) == -1 \|\| status) {
898	serrno = errno;
899	(void)unlink(to_name);
900	errno = serrno;
901	return err(EX_SOFTWARE, "waitpid");
902	/* NOTREACHED */
903	}
904	}
905	return 0;
906	#endif
907	}
908
909	/*
910	* install_dir --
911	* build directory heirarchy
912	*/
913	static int
914	install_dir(char *path)
915	{
916	char *p;
917	struct stat sb;
918	int ch;
919
920	for (p = path;; ++p)
921	if (!p \|\| (p != path && IS_SLASH(p))) {
922	ch = *p;
923	*p = '\0';
924	if (stat(path, &sb)) {
925	if (errno != ENOENT \|\| mkdir(path, 0755) < 0) {
926	return err(EX_OSERR, "mkdir %s", path);
927	/* NOTREACHED */
928	} else if (verbose)
929	(void)printf("install: mkdir %s\n",
930	path);
931	} else if (!S_ISDIR(sb.st_mode))
932	return errx(EX_OSERR, "%s exists but is not a directory", path);
933	if (!(*p = ch))
934	break;
935	}
936
937	if ((gid != (gid_t)-1 \|\| uid != (uid_t)-1) && chown(path, uid, gid))
938	warn("chown %u:%u %s", uid, gid, path);
939	if (chmod(path, mode))
940	warn("chmod %o %s", mode, path);
941	return EX_OK;
942	}
943
944	/*
945	* usage --
946	* print a usage message and die
947	*/
948	static int
949	usage(FILE *pf)
950	{
951	fprintf(stderr,
952	"usage: %s [-bCcpSsv] [-B suffix] [-f flags] [-g group] [-m mode]\n"
953	" [-o owner] file1 file2\n"
954	" or: %s [-bCcpSsv] [-B suffix] [-f flags] [-g group] [-m mode]\n"
955	" [-o owner] file1 ... fileN directory\n"
956	" or: %s -d [-v] [-g group] [-m mode] [-o owner] directory ...\n"
957	" or: %s --help\n"
958	" or: %s --version\n",
959	g_progname, g_progname, g_progname, g_progname, g_progname);
960	return EX_USAGE;
961	}
962
963	#ifdef USE_MMAP
964	/*
965	* trymmap --
966	* return true (1) if mmap should be tried, false (0) if not.
967	*/
968	static int
969	trymmap(int fd)
970	{
971	/*
972	* The ifdef is for bootstrapping - f_fstypename doesn't exist in
973	* pre-Lite2-merge systems.
974	*/
975	#ifdef MFSNAMELEN
976	struct statfs stfs;
977
978	if (nommap \|\| fstatfs(fd, &stfs) != 0)
979	return (0);
980	if (strcmp(stfs.f_fstypename, "ufs") == 0 \|\|
981	strcmp(stfs.f_fstypename, "cd9660") == 0)
982	return (1);
983	#endif
984	return (0);
985	}
986	#endif
987
988	/* figures out where the last slash or colon is. */
989	static char *
990	last_slash(const char *path)
991	{
992	#if defined(__WIN32__) \|\| defined(__WIN64__) \|\| defined(__OS2__)
993	char p = (char )strrchr(path, '/');
994	if (p)
995	{
996	char *p2 = strrchr(p, '\\');
997	if (p2)
998	p = p2;
999	}
1000	else
1001	{
1002	p = (char *)strrchr(path, '\\');
1003	if (!p && isalpha(path[0]) && path[1] == ':')
1004	p = (char *)&path[1];
1005	}
1006	return p;
1007	#else
1008	return strrchr(path, '/');
1009	#endif
1010	}
1011

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