install.c@ 1455

Last change on this file since 1455 was 1329, checked in by bird, 17 years ago
fixed a few warnings the broken --help and --version for install.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 23.8 KB

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

Note: See TracBrowser for help on using the repository browser.

source: kBuild/trunk/src/kmk/kmkbuiltin/install.c@ 1455

Download in other formats: