install.c@ 2012

Last change on this file since 2012 was 1730, checked in by bird, 16 years ago
kmk_install: --[no-]ignore-perm-errors on chmod and chown. This defaults to true unless we're root.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
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	#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	static int ignore_perm_errors;
128
129	static 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
139	static int copy(int, const char , int, const char , off_t);
140	static int compare(int, const char , size_t, int, const char , size_t);
141	static int create_newfile(const char , int, struct stat );
142	static int create_tempfile(const char , char , size_t);
143	static int install(const char , const char , u_long, u_int);
144	static int install_dir(char *);
145	static u_long numeric_id(const char , const char );
146	static int strip(const char *);
147	#ifdef USE_MMAP
148	static int trymmap(int);
149	#endif
150	static int usage(FILE *);
151	static char last_slash(const char );
152
153	int
154	kmk_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
343	static u_long
344	numeric_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	*/
366	static int
367	install(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
680	l_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	*/
694	static int
695	compare(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	*/
763	int
764	create_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	*/
783	int
784	create_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	*/
833	static int
834	copy(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	*/
891	static int
892	strip(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	*/
935	static int
936	install_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	*/
970	static int
971	usage(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	*/
990	static int
991	trymmap(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. */
1011	static char *
1012	last_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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source: kBuild/trunk/src/kmk/kmkbuiltin/install.c@ 2012

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