install.c@ 2321

Last change on this file since 2321 was 2113, checked in by bird, 16 years ago
kmkbuiltin: include config.h
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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
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	#include "config.h"
50	#ifndef _MSC_VER
51	# include <sys/param.h>
52	# ifdef USE_MMAP
53	# include <sys/mman.h>
54	# endif
55	# include <sys/mount.h>
56	# include <sys/wait.h>
57	# include <sys/time.h>
58	#endif /* !_MSC_VER */
59	#include <sys/stat.h>
60
61	#include <ctype.h>
62	#include "err.h"
63	#include <errno.h>
64	#include <fcntl.h>
65	#include <grp.h>
66	#include <paths.h>
67	#include <pwd.h>
68	#include <stdio.h>
69	#include <stdlib.h>
70	#include <string.h>
71	#include <sysexits.h>
72	#include <unistd.h>
73	#if defined(__EMX__) \|\| defined(_MSC_VER)
74	# include <process.h>
75	#endif
76	#include "getopt.h"
77	#ifdef __sun__
78	# include "solfakes.h"
79	#endif
80	#ifdef _MSC_VER
81	# include "mscfakes.h"
82	#endif
83	#include "kmkbuiltin.h"
84
85
86	extern void * bsd_setmode(const char *p);
87	extern mode_t bsd_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
123	static gid_t gid;
124	static uid_t uid;
125	static int dobackup, docompare, dodir, dopreserve, dostrip, nommap, safecopy, verbose;
126	static mode_t mode = S_IRWXU \| S_IRGRP \| S_IXGRP \| S_IROTH \| S_IXOTH;
127	static const char *suffix = BACKUP_SUFFIX;
128	static int ignore_perm_errors;
129
130	static struct option long_options[] =
131	{
132	{ "help", no_argument, 0, 261 },
133	{ "version", no_argument, 0, 262 },
134	{ "ignore-perm-errors", no_argument, 0, 263 },
135	{ "no-ignore-perm-errors", no_argument, 0, 264 },
136	{ 0, 0, 0, 0 },
137	};
138
139
140	static int copy(int, const char , int, const char , off_t);
141	static int compare(int, const char , size_t, int, const char , size_t);
142	static int create_newfile(const char , int, struct stat );
143	static int create_tempfile(const char , char , size_t);
144	static int install(const char , const char , u_long, u_int);
145	static int install_dir(char *);
146	static u_long numeric_id(const char , const char );
147	static int strip(const char *);
148	#ifdef USE_MMAP
149	static int trymmap(int);
150	#endif
151	static int usage(FILE *);
152	static char last_slash(const char );
153
154	int
155	kmk_builtin_install(int argc, char argv[], char * envp)
156	{
157	struct stat from_sb, to_sb;
158	mode_t *set;
159	u_long fset = 0;
160	int ch, no_target;
161	u_int iflags;
162	char *flags;
163	const char group, owner, *to_name;
164	(void)envp;
165
166	/* reinitialize globals */
167	mode = S_IRWXU \| S_IRGRP \| S_IXGRP \| S_IROTH \| S_IXOTH;
168	suffix = BACKUP_SUFFIX;
169	gid = 0;
170	uid = 0;
171	dobackup = docompare = dodir = dopreserve = dostrip = nommap = safecopy = verbose = 0;
172	ignore_perm_errors = geteuid() != 0;
173
174	/* reset getopt and set progname. */
175	g_progname = argv[0];
176	opterr = 1;
177	optarg = NULL;
178	optopt = 0;
179	optind = 0; /* init */
180
181	iflags = 0;
182	group = owner = NULL;
183	while ((ch = getopt_long(argc, argv, "B:bCcdf:g:Mm:o:pSsv", long_options, NULL)) != -1)
184	switch(ch) {
185	case 'B':
186	suffix = optarg;
187	/* FALLTHROUGH */
188	case 'b':
189	dobackup = 1;
190	break;
191	case 'C':
192	docompare = 1;
193	break;
194	case 'c':
195	/* For backwards compatibility. */
196	break;
197	case 'd':
198	dodir = 1;
199	break;
200	case 'f':
201	#ifdef UF_IMMUTABLE
202	flags = optarg;
203	if (strtofflags(&flags, &fset, NULL))
204	return errx(EX_USAGE, "%s: invalid flag", flags);
205	iflags \|= SETFLAGS;
206	#else
207	(void)flags;
208	#endif
209	break;
210	case 'g':
211	group = optarg;
212	break;
213	case 'M':
214	nommap = 1;
215	break;
216	case 'm':
217	if (!(set = bsd_setmode(optarg)))
218	return errx(EX_USAGE, "invalid file mode: %s",
219	optarg);
220	mode = bsd_getmode(set, 0);
221	free(set);
222	break;
223	case 'o':
224	owner = optarg;
225	break;
226	case 'p':
227	docompare = dopreserve = 1;
228	break;
229	case 'S':
230	safecopy = 1;
231	break;
232	case 's':
233	dostrip = 1;
234	break;
235	case 'v':
236	verbose = 1;
237	break;
238	case 261:
239	usage(stdout);
240	return 0;
241	case 262:
242	return kbuild_version(argv[0]);
243	case 263:
244	ignore_perm_errors = 1;
245	break;
246	case 264:
247	ignore_perm_errors = 0;
248	break;
249	case '?':
250	default:
251	return usage(stderr);
252	}
253	argc -= optind;
254	argv += optind;
255
256	/* some options make no sense when creating directories */
257	if (dostrip && dodir) {
258	warnx("-d and -s may not be specified together");
259	return usage(stderr);
260	}
261
262	/* must have at least two arguments, except when creating directories */
263	if (argc == 0 \|\| (argc == 1 && !dodir))
264	return usage(stderr);
265
266	/* need to make a temp copy so we can compare stripped version */
267	if (docompare && dostrip)
268	safecopy = 1;
269
270	/* get group and owner id's */
271	if (group != NULL) {
272	#ifndef _MSC_VER
273	struct group *gp;
274	if ((gp = getgrnam(group)) != NULL)
275	gid = gp->gr_gid;
276	else
277	#endif
278	{
279	gid = (gid_t)numeric_id(group, "group");
280	if (gid == (gid_t)-1)
281	return 1;
282	}
283	} else
284	gid = (gid_t)-1;
285
286	if (owner != NULL) {
287	#ifndef _MSC_VER
288	struct passwd *pp;
289	if ((pp = getpwnam(owner)) != NULL)
290	uid = pp->pw_uid;
291	else
292	#endif
293	{
294	uid = (uid_t)numeric_id(owner, "user");
295	if (uid == (uid_t)-1)
296	return 1;
297	}
298	} else
299	uid = (uid_t)-1;
300
301	if (dodir) {
302	for (; *argv != NULL; ++argv) {
303	int rc = install_dir(*argv);
304	if (rc)
305	return rc;
306	}
307	return EX_OK;
308	/* NOTREACHED */
309	}
310
311	no_target = stat(to_name = argv[argc - 1], &to_sb);
312	if (!no_target && S_ISDIR(to_sb.st_mode)) {
313	for (; *argv != to_name; ++argv) {
314	int rc = install(*argv, to_name, fset, iflags \| DIRECTORY);
315	if (rc)
316	return rc;
317	}
318	return EX_OK;
319	}
320
321	/* can't do file1 file2 directory/file */
322	if (argc != 2) {
323	warnx("wrong number or types of arguments");
324	return usage(stderr);
325	}
326
327	if (!no_target) {
328	if (stat(*argv, &from_sb))
329	return err(EX_OSERR, "%s", *argv);
330	if (!S_ISREG(to_sb.st_mode)) {
331	errno = EFTYPE;
332	return err(EX_OSERR, "%s", to_name);
333	}
334	if (to_sb.st_dev == from_sb.st_dev &&
335	to_sb.st_dev != 0 &&
336	to_sb.st_ino == from_sb.st_ino &&
337	to_sb.st_ino != 0)
338	return errx(EX_USAGE,
339	"%s and %s are the same file", *argv, to_name);
340	}
341	return install(*argv, to_name, fset, iflags);
342	}
343
344	static u_long
345	numeric_id(const char name, const char type)
346	{
347	u_long val;
348	char *ep;
349
350	/*
351	* XXX
352	* We know that uid_t's and gid_t's are unsigned longs.
353	*/
354	errno = 0;
355	val = strtoul(name, &ep, 10);
356	if (errno)
357	return err(-1, "%s", name);
358	if (*ep != '\0')
359	return errx(-1, "unknown %s %s", type, name);
360	return (val);
361	}
362
363	/*
364	* install --
365	* build a path name and install the file
366	*/
367	static int
368	install(const char from_name, const char to_name, u_long fset, u_int flags)
369	{
370	struct stat from_sb, temp_sb, to_sb;
371	struct timeval tvb[2];
372	int devnull, files_match, from_fd, serrno, target;
373	int tempcopy, temp_fd, to_fd;
374	char backup[MAXPATHLEN], *p, pathbuf[MAXPATHLEN], tempfile[MAXPATHLEN];
375	int rc = EX_OK;
376
377	files_match = 0;
378	from_fd = -1;
379	to_fd = -1;
380	temp_fd = -1;
381
382	/* If try to install NULL file to a directory, fails. */
383	if (flags & DIRECTORY
384	#if defined(__EMX__) \|\| defined(_MSC_VER)
385	\|\| ( stricmp(from_name, _PATH_DEVNULL)
386	&& stricmp(from_name, "nul")
387	#ifdef __EMX__
388	&& stricmp(from_name, "/dev/nul")
389	#endif
390	)
391	#else
392	\|\| strcmp(from_name, _PATH_DEVNULL)
393	#endif
394	) {
395	if (stat(from_name, &from_sb))
396	return err(EX_OSERR, "%s", from_name);
397	if (!S_ISREG(from_sb.st_mode)) {
398	errno = EFTYPE;
399	return err(EX_OSERR, "%s", from_name);
400	}
401	/* Build the target path. */
402	if (flags & DIRECTORY) {
403	(void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s",
404	to_name,
405	(p = last_slash(from_name)) ? ++p : from_name);
406	to_name = pathbuf;
407	}
408	devnull = 0;
409	} else {
410	devnull = 1;
411	}
412
413	target = stat(to_name, &to_sb) == 0;
414
415	/* Only install to regular files. */
416	if (target && !S_ISREG(to_sb.st_mode)) {
417	errno = EFTYPE;
418	warn("%s", to_name);
419	return EX_OK;
420	}
421
422	/* Only copy safe if the target exists. */
423	tempcopy = safecopy && target;
424
425	if (!devnull && (from_fd = open(from_name, O_RDONLY \| O_BINARY, 0)) < 0)
426	return err(EX_OSERR, "%s", from_name);
427
428	/* If we don't strip, we can compare first. */
429	if (docompare && !dostrip && target) {
430	if ((to_fd = open(to_name, O_RDONLY \| O_BINARY, 0)) < 0) {
431	rc = err(EX_OSERR, "%s", to_name);
432	goto l_done;
433	}
434	if (devnull)
435	files_match = to_sb.st_size == 0;
436	else
437	files_match = !(compare(from_fd, from_name,
438	(size_t)from_sb.st_size, to_fd,
439	to_name, (size_t)to_sb.st_size));
440
441	/* Close "to" file unless we match. */
442	if (!files_match) {
443	(void)close(to_fd);
444	to_fd = -1;
445	}
446	}
447
448	if (!files_match) {
449	if (tempcopy) {
450	to_fd = create_tempfile(to_name, tempfile,
451	sizeof(tempfile));
452	if (to_fd < 0) {
453	rc = err(EX_OSERR, "%s", tempfile);
454	goto l_done;
455	}
456	} else {
457	if ((to_fd = create_newfile(to_name, target,
458	&to_sb)) < 0) {
459	rc = err(EX_OSERR, "%s", to_name);
460	goto l_done;
461	}
462	if (verbose)
463	(void)printf("install: %s -> %s\n",
464	from_name, to_name);
465	}
466	if (!devnull) {
467	rc = copy(from_fd, from_name, to_fd,
468	tempcopy ? tempfile : to_name, from_sb.st_size);
469	if (rc)
470	goto l_done;
471	}
472	}
473
474	if (dostrip) {
475	#if defined(__EMX__) \|\| defined(_MSC_VER)
476	/* close before we strip. */
477	close(to_fd);
478	to_fd = -1;
479	#endif
480	rc = strip(tempcopy ? tempfile : to_name);
481	if (rc)
482	goto l_done;
483
484	/*
485	* Re-open our fd on the target, in case we used a strip
486	* that does not work in-place -- like GNU binutils strip.
487	*/
488	#if !defined(__EMX__) && !defined(_MSC_VER)
489	close(to_fd);
490	#endif
491	to_fd = open(tempcopy ? tempfile : to_name, O_RDONLY \| O_BINARY, 0);
492	if (to_fd < 0) {
493	rc = err(EX_OSERR, "stripping %s", to_name);
494	goto l_done;
495	}
496	}
497
498	/*
499	* Compare the stripped temp file with the target.
500	*/
501	if (docompare && dostrip && target) {
502	temp_fd = to_fd;
503
504	/* Re-open to_fd using the real target name. */
505	if ((to_fd = open(to_name, O_RDONLY \| O_BINARY, 0)) < 0) {
506	rc = err(EX_OSERR, "%s", to_name);
507	goto l_done;
508	}
509
510	if (fstat(temp_fd, &temp_sb)) {
511	serrno = errno;
512	(void)unlink(tempfile);
513	errno = serrno;
514	rc = err(EX_OSERR, "%s", tempfile);
515	goto l_done;
516	}
517
518	if (compare(temp_fd, tempfile, (size_t)temp_sb.st_size, to_fd,
519	to_name, (size_t)to_sb.st_size) == 0) {
520	/*
521	* If target has more than one link we need to
522	* replace it in order to snap the extra links.
523	* Need to preserve target file times, though.
524	*/
525	#if !defined(_MSC_VER) && !defined(__EMX__)
526	if (to_sb.st_nlink != 1) {
527	tvb[0].tv_sec = to_sb.st_atime;
528	tvb[0].tv_usec = 0;
529	tvb[1].tv_sec = to_sb.st_mtime;
530	tvb[1].tv_usec = 0;
531	(void)utimes(tempfile, tvb);
532	} else
533	#endif
534	{
535
536	files_match = 1;
537	(void)unlink(tempfile);
538	}
539	(void) close(temp_fd);
540	temp_fd = -1;
541	}
542	}
543
544	/*
545	* Move the new file into place if doing a safe copy
546	* and the files are different (or just not compared).
547	*/
548	if (tempcopy && !files_match) {
549	#ifdef UF_IMMUTABLE
550	/* Try to turn off the immutable bits. */
551	if (to_sb.st_flags & NOCHANGEBITS)
552	(void)chflags(to_name, to_sb.st_flags & ~NOCHANGEBITS);
553	#endif
554	if (dobackup) {
555	if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s", to_name,
556	suffix) != strlen(to_name) + strlen(suffix)) {
557	unlink(tempfile);
558	rc = errx(EX_OSERR, "%s: backup filename too long",
559	to_name);
560	goto l_done;
561	}
562	if (verbose)
563	(void)printf("install: %s -> %s\n", to_name, backup);
564	if (rename(to_name, backup) < 0) {
565	serrno = errno;
566	unlink(tempfile);
567	errno = serrno;
568	rc = err(EX_OSERR, "rename: %s to %s", to_name,
569	backup);
570	goto l_done;
571	}
572	}
573	if (verbose)
574	(void)printf("install: %s -> %s\n", from_name, to_name);
575	if (rename(tempfile, to_name) < 0) {
576	serrno = errno;
577	unlink(tempfile);
578	errno = serrno;
579	rc = err(EX_OSERR, "rename: %s to %s",
580	tempfile, to_name);
581	goto l_done;
582	}
583
584	/* Re-open to_fd so we aren't hosed by the rename(2). */
585	(void) close(to_fd);
586	if ((to_fd = open(to_name, O_RDONLY \| O_BINARY, 0)) < 0) {
587	rc = err(EX_OSERR, "%s", to_name);
588	goto l_done;
589	}
590	}
591
592	/*
593	* Preserve the timestamp of the source file if necessary.
594	*/
595	if (dopreserve && !files_match && !devnull) {
596	tvb[0].tv_sec = from_sb.st_atime;
597	tvb[0].tv_usec = 0;
598	tvb[1].tv_sec = from_sb.st_mtime;
599	tvb[1].tv_usec = 0;
600	(void)utimes(to_name, tvb);
601	}
602
603	if (fstat(to_fd, &to_sb) == -1) {
604	serrno = errno;
605	(void)unlink(to_name);
606	errno = serrno;
607	rc = err(EX_OSERR, "%s", to_name);
608	goto l_done;
609	}
610
611	/*
612	* Set owner, group, mode for target; do the chown first,
613	* chown may lose the setuid bits.
614	*/
615	#ifdef UF_IMMUTABLE
616	if ((gid != (gid_t)-1 && gid != to_sb.st_gid) \|\|
617	(uid != (uid_t)-1 && uid != to_sb.st_uid) \|\|
618	(mode != (to_sb.st_mode & ALLPERMS))) {
619	/* Try to turn off the immutable bits. */
620	if (to_sb.st_flags & NOCHANGEBITS)
621	(void)fchflags(to_fd, to_sb.st_flags & ~NOCHANGEBITS);
622	}
623	#endif
624
625	if ((gid != (gid_t)-1 && gid != to_sb.st_gid) \|\|
626	(uid != (uid_t)-1 && uid != to_sb.st_uid))
627	if (fchown(to_fd, uid, gid) == -1) {
628	if (errno == EPERM && ignore_perm_errors) {
629	warn("%s: ignoring chown uid=%d gid=%d failure", to_name, (int)uid, (int)gid);
630	} else {
631	serrno = errno;
632	(void)unlink(to_name);
633	errno = serrno;
634	rc = err(EX_OSERR,"%s: chown/chgrp", to_name);
635	goto l_done;
636	}
637	}
638
639	if (mode != (to_sb.st_mode & ALLPERMS))
640	if (fchmod(to_fd, mode)) {
641	serrno = errno;
642	if (serrno == EPERM && ignore_perm_errors) {
643	fchmod(to_fd, mode & (ALLPERMS & ~0007000));
644	errno = errno;
645	warn("%s: ignoring chmod 0%o failure", to_name, (int)(mode & ALLPERMS));
646	} else {
647	serrno = errno;
648	(void)unlink(to_name);
649	errno = serrno;
650	rc = err(EX_OSERR, "%s: chmod", to_name);
651	goto l_done;
652	}
653	}
654
655	/*
656	* If provided a set of flags, set them, otherwise, preserve the
657	* flags, except for the dump flag.
658	* NFS does not support flags. Ignore EOPNOTSUPP flags if we're just
659	* trying to turn off UF_NODUMP. If we're trying to set real flags,
660	* then warn if the the fs doesn't support it, otherwise fail.
661	*/
662	#ifdef UF_IMMUTABLE
663	if (!devnull && (flags & SETFLAGS \|\|
664	(from_sb.st_flags & ~UF_NODUMP) != to_sb.st_flags) &&
665	fchflags(to_fd,
666	flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) {
667	if (flags & SETFLAGS) {
668	if (errno == EOPNOTSUPP)
669	warn("%s: chflags", to_name);
670	else {
671	serrno = errno;
672	(void)unlink(to_name);
673	errno = serrno;
674	rc = err(EX_OSERR, "%s: chflags", to_name);
675	goto l_done;
676	}
677	}
678	}
679	#endif
680
681	l_done:
682	if (to_fd >= 0)
683	(void)close(to_fd);
684	if (temp_fd >= 0)
685	(void)close(temp_fd);
686	if (!devnull)
687	(void)close(from_fd);
688	return rc;
689	}
690
691	/*
692	* compare --
693	* compare two files; non-zero means files differ
694	*/
695	static int
696	compare(int from_fd, const char *from_name __unused, size_t from_len,
697	int to_fd, const char *to_name __unused, size_t to_len)
698	{
699	char p, q;
700	int rv;
701	int done_compare;
702
703	rv = 0;
704	if (from_len != to_len)
705	return 1;
706
707	if (from_len <= MAX_CMP_SIZE) {
708	#ifdef USE_MMAP
709	done_compare = 0;
710	if (trymmap(from_fd) && trymmap(to_fd)) {
711	p = mmap(NULL, from_len, PROT_READ, MAP_SHARED, from_fd, (off_t)0);
712	if (p == (char *)MAP_FAILED)
713	goto out;
714	q = mmap(NULL, from_len, PROT_READ, MAP_SHARED, to_fd, (off_t)0);
715	if (q == (char *)MAP_FAILED) {
716	munmap(p, from_len);
717	goto out;
718	}
719
720	rv = memcmp(p, q, from_len);
721	munmap(p, from_len);
722	munmap(q, from_len);
723	done_compare = 1;
724	}
725	out:
726	#else
727	(void)p; (void)q;
728	done_compare = 0;
729	#endif
730	if (!done_compare) {
731	char buf1[MAXBSIZE];
732	char buf2[MAXBSIZE];
733	int n1, n2;
734
735	rv = 0;
736	lseek(from_fd, 0, SEEK_SET);
737	lseek(to_fd, 0, SEEK_SET);
738	while (rv == 0) {
739	n1 = read(from_fd, buf1, sizeof(buf1));
740	if (n1 == 0)
741	break; /* EOF */
742	else if (n1 > 0) {
743	n2 = read(to_fd, buf2, n1);
744	if (n2 == n1)
745	rv = memcmp(buf1, buf2, n1);
746	else
747	rv = 1; /* out of sync */
748	} else
749	rv = 1; /* read failure */
750	}
751	lseek(from_fd, 0, SEEK_SET);
752	lseek(to_fd, 0, SEEK_SET);
753	}
754	} else
755	rv = 1; /* don't bother in this case */
756
757	return rv;
758	}
759
760	/*
761	* create_tempfile --
762	* create a temporary file based on path and open it
763	*/
764	int
765	create_tempfile(const char path, char temp, size_t tsize)
766	{
767	char *p;
768
769	(void)strncpy(temp, path, tsize);
770	temp[tsize - 1] = '\0';
771	if ((p = last_slash(temp)) != NULL)
772	p++;
773	else
774	p = temp;
775	(void)strncpy(p, "INS@XXXX", &temp[tsize - 1] - p);
776	temp[tsize - 1] = '\0';
777	return (mkstemp(temp));
778	}
779
780	/*
781	* create_newfile --
782	* create a new file, overwriting an existing one if necessary
783	*/
784	int
785	create_newfile(const char path, int target, struct stat sbp)
786	{
787	char backup[MAXPATHLEN];
788	int saved_errno = 0;
789	int newfd;
790
791	if (target) {
792	/*
793	* Unlink now... avoid ETXTBSY errors later. Try to turn
794	* off the append/immutable bits -- if we fail, go ahead,
795	* it might work.
796	*/
797	#ifdef UF_IMMUTABLE
798	if (sbp->st_flags & NOCHANGEBITS)
799	(void)chflags(path, sbp->st_flags & ~NOCHANGEBITS);
800	#endif
801
802	if (dobackup) {
803	if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s",
804	path, suffix) != strlen(path) + strlen(suffix)) {
805	errx(EX_OSERR, "%s: backup filename too long",
806	path);
807	errno = ENAMETOOLONG;
808	return -1;
809	}
810	(void)snprintf(backup, MAXPATHLEN, "%s%s",
811	path, suffix);
812	if (verbose)
813	(void)printf("install: %s -> %s\n",
814	path, backup);
815	if (rename(path, backup) < 0) {
816	err(EX_OSERR, "rename: %s to %s", path, backup);
817	return -1;
818	}
819	} else
820	if (unlink(path) < 0)
821	saved_errno = errno;
822	}
823
824	newfd = open(path, O_CREAT \| O_RDWR \| O_TRUNC \| O_BINARY, S_IRUSR \| S_IWUSR);
825	if (newfd < 0 && saved_errno != 0)
826	errno = saved_errno;
827	return newfd;
828	}
829
830	/*
831	* copy --
832	* copy from one file to another
833	*/
834	static int
835	copy(int from_fd, const char from_name, int to_fd, const char to_name,
836	off_t size)
837	{
838	int nr, nw;
839	int serrno;
840	char *p, buf[MAXBSIZE];
841	int done_copy;
842
843	/* Rewind file descriptors. */
844	if (lseek(from_fd, (off_t)0, SEEK_SET) == (off_t)-1)
845	return err(EX_OSERR, "lseek: %s", from_name);
846	if (lseek(to_fd, (off_t)0, SEEK_SET) == (off_t)-1)
847	return err(EX_OSERR, "lseek: %s", to_name);
848
849	/*
850	* Mmap and write if less than 8M (the limit is so we don't totally
851	* trash memory on big files. This is really a minor hack, but it
852	* wins some CPU back.
853	*/
854	done_copy = 0;
855	#ifdef USE_MMAP
856	if (size <= 8 * 1048576 && trymmap(from_fd) &&
857	(p = mmap(NULL, (size_t)size, PROT_READ, MAP_SHARED,
858	from_fd, (off_t)0)) != (char *)MAP_FAILED) {
859	if ((nw = write(to_fd, p, size)) != size) {
860	serrno = errno;
861	(void)unlink(to_name);
862	errno = nw > 0 ? EIO : serrno;
863	err(EX_OSERR, "%s", to_name);
864	}
865	done_copy = 1;
866	}
867	#else
868	(void)p; (void)size;
869	#endif
870	if (!done_copy) {
871	while ((nr = read(from_fd, buf, sizeof(buf))) > 0)
872	if ((nw = write(to_fd, buf, nr)) != nr) {
873	serrno = errno;
874	(void)unlink(to_name);
875	errno = nw > 0 ? EIO : serrno;
876	return err(EX_OSERR, "%s", to_name);
877	}
878	if (nr != 0) {
879	serrno = errno;
880	(void)unlink(to_name);
881	errno = serrno;
882	return err(EX_OSERR, "%s", from_name);
883	}
884	}
885	return EX_OK;
886	}
887
888	/*
889	* strip --
890	* use strip(1) to strip the target file
891	*/
892	static int
893	strip(const char *to_name)
894	{
895	#if defined(__EMX__) \|\| defined(_MSC_VER)
896	const char *stripbin = getenv("STRIPBIN");
897	if (stripbin == NULL)
898	stripbin = "strip";
899	return spawnlp(P_WAIT, stripbin, stripbin, to_name, NULL);
900	#else
901	const char *stripbin;
902	int serrno, status;
903	pid_t pid;
904
905	pid = fork();
906	switch (pid) {
907	case -1:
908	serrno = errno;
909	(void)unlink(to_name);
910	errno = serrno;
911	return err(EX_TEMPFAIL, "fork");
912	case 0:
913	stripbin = getenv("STRIPBIN");
914	if (stripbin == NULL)
915	stripbin = "strip";
916	execlp(stripbin, stripbin, to_name, (char *)NULL);
917	err(EX_OSERR, "exec(%s)", stripbin);
918	exit(EX_OSERR);
919	default:
920	if (waitpid(pid, &status, 0) == -1 \|\| status) {
921	serrno = errno;
922	(void)unlink(to_name);
923	errno = serrno;
924	return err(EX_SOFTWARE, "waitpid");
925	/* NOTREACHED */
926	}
927	}
928	return 0;
929	#endif
930	}
931
932	/*
933	* install_dir --
934	* build directory heirarchy
935	*/
936	static int
937	install_dir(char *path)
938	{
939	char *p;
940	struct stat sb;
941	int ch;
942
943	for (p = path;; ++p)
944	if (!p \|\| (p != path && IS_SLASH(p))) {
945	ch = *p;
946	*p = '\0';
947	if (stat(path, &sb)) {
948	if (errno != ENOENT \|\| mkdir(path, 0755) < 0) {
949	return err(EX_OSERR, "mkdir %s", path);
950	/* NOTREACHED */
951	} else if (verbose)
952	(void)printf("install: mkdir %s\n",
953	path);
954	} else if (!S_ISDIR(sb.st_mode))
955	return errx(EX_OSERR, "%s exists but is not a directory", path);
956	if (!(*p = ch))
957	break;
958	}
959
960	if ((gid != (gid_t)-1 \|\| uid != (uid_t)-1) && chown(path, uid, gid))
961	warn("chown %u:%u %s", uid, gid, path);
962	if (chmod(path, mode))
963	warn("chmod %o %s", mode, path);
964	return EX_OK;
965	}
966
967	/*
968	* usage --
969	* print a usage message and die
970	*/
971	static int
972	usage(FILE *pf)
973	{
974	fprintf(pf,
975	"usage: %s [-bCcpSsv] [--[no-]ignore-perm-errors] [-B suffix] [-f flags]\n"
976	" [-g group] [-m mode] [-o owner] file1 file2\n"
977	" or: %s [-bCcpSsv] [--[no-]ignore-perm-errors] [-B suffix] [-f flags]\n"
978	" [-g group] [-m mode] [-o owner] file1 ... fileN directory\n"
979	" or: %s -d [-v] [-g group] [-m mode] [-o owner] directory ...\n"
980	" or: %s --help\n"
981	" or: %s --version\n",
982	g_progname, g_progname, g_progname, g_progname, g_progname);
983	return EX_USAGE;
984	}
985
986	#ifdef USE_MMAP
987	/*
988	* trymmap --
989	* return true (1) if mmap should be tried, false (0) if not.
990	*/
991	static int
992	trymmap(int fd)
993	{
994	/*
995	* The ifdef is for bootstrapping - f_fstypename doesn't exist in
996	* pre-Lite2-merge systems.
997	*/
998	#ifdef MFSNAMELEN
999	struct statfs stfs;
1000
1001	if (nommap \|\| fstatfs(fd, &stfs) != 0)
1002	return (0);
1003	if (strcmp(stfs.f_fstypename, "ufs") == 0 \|\|
1004	strcmp(stfs.f_fstypename, "cd9660") == 0)
1005	return (1);
1006	#endif
1007	return (0);
1008	}
1009	#endif
1010
1011	/* figures out where the last slash or colon is. */
1012	static char *
1013	last_slash(const char *path)
1014	{
1015	#if defined(__WIN32__) \|\| defined(__WIN64__) \|\| defined(__OS2__)
1016	char p = (char )strrchr(path, '/');
1017	if (p)
1018	{
1019	char *p2 = strrchr(p, '\\');
1020	if (p2)
1021	p = p2;
1022	}
1023	else
1024	{
1025	p = (char *)strrchr(path, '\\');
1026	if (!p && isalpha(path[0]) && path[1] == ':')
1027	p = (char *)&path[1];
1028	}
1029	return p;
1030	#else
1031	return strrchr(path, '/');
1032	#endif
1033	}
1034

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source: kBuild/branches/kBuild-0.1.5/src/kmk/kmkbuiltin/install.c@ 2321

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