install.c@ 942

Last change on this file since 942 was 942, checked in by bird, 18 years ago
Always use the GNU make getopt stuff.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 22.7 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
76	#ifdef __sun__
77	# include "solfakes.h"
78	#endif
79	#ifdef _MSC_VER
80	# include "mscfakes.h"
81	#endif
82
83	extern void * setmode(const char *p);
84	extern mode_t getmode(const void *bbox, mode_t omode);
85
86	#ifndef __unused
87	# define __unused
88	#endif
89
90	#ifndef MAXBSIZE
91	# define MAXBSIZE 16384
92	#endif
93
94	/* Bootstrap aid - this doesn't exist in most older releases */
95	#ifndef MAP_FAILED
96	#define MAP_FAILED ((void )-1) / from <sys/mman.h> */
97	#endif
98
99	#define MAX_CMP_SIZE (16 * 1024 * 1024)
100
101	#define DIRECTORY 0x01 /* Tell install it's a directory. */
102	#define SETFLAGS 0x02 /* Tell install to set flags. */
103	#define NOCHANGEBITS (UF_IMMUTABLE \| UF_APPEND \| SF_IMMUTABLE \| SF_APPEND)
104	#define BACKUP_SUFFIX ".old"
105
106	#ifndef O_BINARY
107	# define O_BINARY 0
108	#endif
109
110	#ifndef EFTYPE
111	# define EFTYPE EINVAL
112	#endif
113
114	static gid_t gid;
115	static uid_t uid;
116	static int dobackup, docompare, dodir, dopreserve, dostrip, nommap, safecopy, verbose;
117	static mode_t mode = S_IRWXU \| S_IRGRP \| S_IXGRP \| S_IROTH \| S_IXOTH;
118	static const char *suffix = BACKUP_SUFFIX;
119
120	static int copy(int, const char , int, const char , off_t);
121	static int compare(int, const char , size_t, int, const char , size_t);
122	static int create_newfile(const char , int, struct stat );
123	static int create_tempfile(const char , char , size_t);
124	static int install(const char , const char , u_long, u_int);
125	static int install_dir(char *);
126	static u_long numeric_id(const char , const char );
127	static int strip(const char *);
128	#ifdef USE_MMAP
129	static int trymmap(int);
130	#endif
131	static int usage(void);
132
133	int
134	kmk_builtin_install(int argc, char *argv[])
135	{
136	struct stat from_sb, to_sb;
137	mode_t *set;
138	u_long fset = 0;
139	int ch, no_target;
140	u_int iflags;
141	char *flags;
142	const char group, owner, *to_name;
143
144	/* reinitialize globals */
145	mode = S_IRWXU \| S_IRGRP \| S_IXGRP \| S_IROTH \| S_IXOTH;
146	suffix = BACKUP_SUFFIX;
147	gid = 0;
148	uid = 0;
149	dobackup = docompare = dodir = dopreserve = dostrip = nommap = safecopy = verbose = 0;
150
151	/* reset getopt and set progname. */
152	g_progname = argv[0];
153	opterr = 1;
154	optarg = NULL;
155	optopt = 0;
156	optind = 0; /* init */
157
158	iflags = 0;
159	group = owner = NULL;
160	while ((ch = getopt(argc, argv, "B:bCcdf:g:Mm:o:pSsv")) != -1)
161	switch((char)ch) {
162	case 'B':
163	suffix = optarg;
164	/* FALLTHROUGH */
165	case 'b':
166	dobackup = 1;
167	break;
168	case 'C':
169	docompare = 1;
170	break;
171	case 'c':
172	/* For backwards compatibility. */
173	break;
174	case 'd':
175	dodir = 1;
176	break;
177	case 'f':
178	#ifdef UF_IMMUTABLE
179	flags = optarg;
180	if (strtofflags(&flags, &fset, NULL))
181	return errx(EX_USAGE, "%s: invalid flag", flags);
182	iflags \|= SETFLAGS;
183	#else
184	(void)flags;
185	#endif
186	break;
187	case 'g':
188	group = optarg;
189	break;
190	case 'M':
191	nommap = 1;
192	break;
193	case 'm':
194	#ifdef __EMX__
195	if (!(set = bsd_setmode(optarg)))
196	#else
197	if (!(set = setmode(optarg)))
198	#endif
199	return errx(EX_USAGE, "invalid file mode: %s",
200	optarg);
201	mode = getmode(set, 0);
202	free(set);
203	break;
204	case 'o':
205	owner = optarg;
206	break;
207	case 'p':
208	docompare = dopreserve = 1;
209	break;
210	case 'S':
211	safecopy = 1;
212	break;
213	case 's':
214	dostrip = 1;
215	break;
216	case 'v':
217	verbose = 1;
218	break;
219	case '?':
220	default:
221	return usage();
222	}
223	argc -= optind;
224	argv += optind;
225
226	/* some options make no sense when creating directories */
227	if (dostrip && dodir) {
228	warnx("-d and -s may not be specified together");
229	return usage();
230	}
231
232	/* must have at least two arguments, except when creating directories */
233	if (argc == 0 \|\| (argc == 1 && !dodir))
234	return usage();
235
236	/* need to make a temp copy so we can compare stripped version */
237	if (docompare && dostrip)
238	safecopy = 1;
239
240	/* get group and owner id's */
241	if (group != NULL) {
242	#ifndef _MSC_VER
243	struct group *gp;
244	if ((gp = getgrnam(group)) != NULL)
245	gid = gp->gr_gid;
246	else
247	#endif
248	{
249	gid = (gid_t)numeric_id(group, "group");
250	if (gid == (gid_t)-1)
251	return 1;
252	}
253	} else
254	gid = (gid_t)-1;
255
256	if (owner != NULL) {
257	#ifndef _MSC_VER
258	struct passwd *pp;
259	if ((pp = getpwnam(owner)) != NULL)
260	uid = pp->pw_uid;
261	else
262	#endif
263	{
264	uid = (uid_t)numeric_id(owner, "user");
265	if (uid == (uid_t)-1)
266	return 1;
267	}
268	} else
269	uid = (uid_t)-1;
270
271	if (dodir) {
272	for (; *argv != NULL; ++argv) {
273	int rc = install_dir(*argv);
274	if (rc)
275	return rc;
276	}
277	return EX_OK;
278	/* NOTREACHED */
279	}
280
281	no_target = stat(to_name = argv[argc - 1], &to_sb);
282	if (!no_target && S_ISDIR(to_sb.st_mode)) {
283	for (; *argv != to_name; ++argv) {
284	int rc = install(*argv, to_name, fset, iflags \| DIRECTORY);
285	if (rc)
286	return rc;
287	}
288	return EX_OK;
289	}
290
291	/* can't do file1 file2 directory/file */
292	if (argc != 2) {
293	warnx("wrong number or types of arguments");
294	return usage();
295	}
296
297	if (!no_target) {
298	if (stat(*argv, &from_sb))
299	return err(EX_OSERR, "%s", *argv);
300	if (!S_ISREG(to_sb.st_mode)) {
301	errno = EFTYPE;
302	return err(EX_OSERR, "%s", to_name);
303	}
304	if (to_sb.st_dev == from_sb.st_dev &&
305	to_sb.st_dev != 0 &&
306	to_sb.st_ino == from_sb.st_ino &&
307	to_sb.st_ino != 0)
308	return errx(EX_USAGE,
309	"%s and %s are the same file", *argv, to_name);
310	}
311	return install(*argv, to_name, fset, iflags);
312	}
313
314	static u_long
315	numeric_id(const char name, const char type)
316	{
317	u_long val;
318	char *ep;
319
320	/*
321	* XXX
322	* We know that uid_t's and gid_t's are unsigned longs.
323	*/
324	errno = 0;
325	val = strtoul(name, &ep, 10);
326	if (errno)
327	return err(-1, "%s", name);
328	if (*ep != '\0')
329	return errx(-1, "unknown %s %s", type, name);
330	return (val);
331	}
332
333	/*
334	* install --
335	* build a path name and install the file
336	*/
337	static int
338	install(const char from_name, const char to_name, u_long fset, u_int flags)
339	{
340	struct stat from_sb, temp_sb, to_sb;
341	struct timeval tvb[2];
342	int devnull, files_match, from_fd, serrno, target;
343	int tempcopy, temp_fd, to_fd;
344	char backup[MAXPATHLEN], *p, pathbuf[MAXPATHLEN], tempfile[MAXPATHLEN];
345	int rc = EX_OK;
346
347	files_match = 0;
348	from_fd = -1;
349	to_fd = -1;
350	temp_fd = -1;
351
352	/* If try to install NULL file to a directory, fails. */
353	if (flags & DIRECTORY
354	#if defined(__EMX__) \|\| defined(_MSC_VER)
355	\|\| ( stricmp(from_name, _PATH_DEVNULL)
356	&& stricmp(from_name, "nul")
357	#ifdef __EMX__
358	&& stricmp(from_name, "/dev/nul")
359	#endif
360	)
361	#else
362	\|\| strcmp(from_name, _PATH_DEVNULL)
363	#endif
364	) {
365	if (stat(from_name, &from_sb))
366	return err(EX_OSERR, "%s", from_name);
367	if (!S_ISREG(from_sb.st_mode)) {
368	errno = EFTYPE;
369	return err(EX_OSERR, "%s", from_name);
370	}
371	/* Build the target path. */
372	if (flags & DIRECTORY) {
373	(void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s",
374	to_name,
375	(p = strrchr(from_name, '/')) ? ++p : from_name);
376	to_name = pathbuf;
377	}
378	devnull = 0;
379	} else {
380	devnull = 1;
381	}
382
383	target = stat(to_name, &to_sb) == 0;
384
385	/* Only install to regular files. */
386	if (target && !S_ISREG(to_sb.st_mode)) {
387	errno = EFTYPE;
388	warn("%s", to_name);
389	return EX_OK;
390	}
391
392	/* Only copy safe if the target exists. */
393	tempcopy = safecopy && target;
394
395	if (!devnull && (from_fd = open(from_name, O_RDONLY \| O_BINARY, 0)) < 0)
396	return err(EX_OSERR, "%s", from_name);
397
398	/* If we don't strip, we can compare first. */
399	if (docompare && !dostrip && target) {
400	if ((to_fd = open(to_name, O_RDONLY \| O_BINARY, 0)) < 0) {
401	rc = err(EX_OSERR, "%s", to_name);
402	goto l_done;
403	}
404	if (devnull)
405	files_match = to_sb.st_size == 0;
406	else
407	files_match = !(compare(from_fd, from_name,
408	(size_t)from_sb.st_size, to_fd,
409	to_name, (size_t)to_sb.st_size));
410
411	/* Close "to" file unless we match. */
412	if (!files_match) {
413	(void)close(to_fd);
414	to_fd = -1;
415	}
416	}
417
418	if (!files_match) {
419	if (tempcopy) {
420	to_fd = create_tempfile(to_name, tempfile,
421	sizeof(tempfile));
422	if (to_fd < 0) {
423	rc = err(EX_OSERR, "%s", tempfile);
424	goto l_done;
425	}
426	} else {
427	if ((to_fd = create_newfile(to_name, target,
428	&to_sb)) < 0) {
429	rc = err(EX_OSERR, "%s", to_name);
430	goto l_done;
431	}
432	if (verbose)
433	(void)printf("install: %s -> %s\n",
434	from_name, to_name);
435	}
436	if (!devnull) {
437	rc = copy(from_fd, from_name, to_fd,
438	tempcopy ? tempfile : to_name, from_sb.st_size);
439	if (rc)
440	goto l_done;
441	}
442	}
443
444	if (dostrip) {
445	#if defined(__EMX__) \|\| defined(_MSC_VER)
446	/* close before we strip. */
447	close(to_fd);
448	to_fd = -1;
449	#endif
450	rc = strip(tempcopy ? tempfile : to_name);
451	if (rc)
452	goto l_done;
453
454	/*
455	* Re-open our fd on the target, in case we used a strip
456	* that does not work in-place -- like GNU binutils strip.
457	*/
458	#if !defined(__EMX__) && !defined(_MSC_VER)
459	close(to_fd);
460	#endif
461	to_fd = open(tempcopy ? tempfile : to_name, O_RDONLY \| O_BINARY, 0);
462	if (to_fd < 0) {
463	rc = err(EX_OSERR, "stripping %s", to_name);
464	goto l_done;
465	}
466	}
467
468	/*
469	* Compare the stripped temp file with the target.
470	*/
471	if (docompare && dostrip && target) {
472	temp_fd = to_fd;
473
474	/* Re-open to_fd using the real target name. */
475	if ((to_fd = open(to_name, O_RDONLY \| O_BINARY, 0)) < 0) {
476	rc = err(EX_OSERR, "%s", to_name);
477	goto l_done;
478	}
479
480	if (fstat(temp_fd, &temp_sb)) {
481	serrno = errno;
482	(void)unlink(tempfile);
483	errno = serrno;
484	rc = err(EX_OSERR, "%s", tempfile);
485	goto l_done;
486	}
487
488	if (compare(temp_fd, tempfile, (size_t)temp_sb.st_size, to_fd,
489	to_name, (size_t)to_sb.st_size) == 0) {
490	/*
491	* If target has more than one link we need to
492	* replace it in order to snap the extra links.
493	* Need to preserve target file times, though.
494	*/
495	#if !defined(_MSC_VER) && !defined(__EMX__)
496	if (to_sb.st_nlink != 1) {
497	tvb[0].tv_sec = to_sb.st_atime;
498	tvb[0].tv_usec = 0;
499	tvb[1].tv_sec = to_sb.st_mtime;
500	tvb[1].tv_usec = 0;
501	(void)utimes(tempfile, tvb);
502	} else
503	#endif
504	{
505
506	files_match = 1;
507	(void)unlink(tempfile);
508	}
509	(void) close(temp_fd);
510	temp_fd = -1;
511	}
512	}
513
514	/*
515	* Move the new file into place if doing a safe copy
516	* and the files are different (or just not compared).
517	*/
518	if (tempcopy && !files_match) {
519	#ifdef UF_IMMUTABLE
520	/* Try to turn off the immutable bits. */
521	if (to_sb.st_flags & NOCHANGEBITS)
522	(void)chflags(to_name, to_sb.st_flags & ~NOCHANGEBITS);
523	#endif
524	if (dobackup) {
525	if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s", to_name,
526	suffix) != strlen(to_name) + strlen(suffix)) {
527	unlink(tempfile);
528	rc = errx(EX_OSERR, "%s: backup filename too long",
529	to_name);
530	goto l_done;
531	}
532	if (verbose)
533	(void)printf("install: %s -> %s\n", to_name, backup);
534	if (rename(to_name, backup) < 0) {
535	serrno = errno;
536	unlink(tempfile);
537	errno = serrno;
538	rc = err(EX_OSERR, "rename: %s to %s", to_name,
539	backup);
540	goto l_done;
541	}
542	}
543	if (verbose)
544	(void)printf("install: %s -> %s\n", from_name, to_name);
545	if (rename(tempfile, to_name) < 0) {
546	serrno = errno;
547	unlink(tempfile);
548	errno = serrno;
549	rc = err(EX_OSERR, "rename: %s to %s",
550	tempfile, to_name);
551	goto l_done;
552	}
553
554	/* Re-open to_fd so we aren't hosed by the rename(2). */
555	(void) close(to_fd);
556	if ((to_fd = open(to_name, O_RDONLY \| O_BINARY, 0)) < 0) {
557	rc = err(EX_OSERR, "%s", to_name);
558	goto l_done;
559	}
560	}
561
562	/*
563	* Preserve the timestamp of the source file if necessary.
564	*/
565	if (dopreserve && !files_match && !devnull) {
566	tvb[0].tv_sec = from_sb.st_atime;
567	tvb[0].tv_usec = 0;
568	tvb[1].tv_sec = from_sb.st_mtime;
569	tvb[1].tv_usec = 0;
570	(void)utimes(to_name, tvb);
571	}
572
573	if (fstat(to_fd, &to_sb) == -1) {
574	serrno = errno;
575	(void)unlink(to_name);
576	errno = serrno;
577	rc = err(EX_OSERR, "%s", to_name);
578	goto l_done;
579	}
580
581	/*
582	* Set owner, group, mode for target; do the chown first,
583	* chown may lose the setuid bits.
584	*/
585	#ifdef UF_IMMUTABLE
586	if ((gid != (gid_t)-1 && gid != to_sb.st_gid) \|\|
587	(uid != (uid_t)-1 && uid != to_sb.st_uid) \|\|
588	(mode != (to_sb.st_mode & ALLPERMS))) {
589	/* Try to turn off the immutable bits. */
590	if (to_sb.st_flags & NOCHANGEBITS)
591	(void)fchflags(to_fd, to_sb.st_flags & ~NOCHANGEBITS);
592	}
593	#endif
594
595	if ((gid != (gid_t)-1 && gid != to_sb.st_gid) \|\|
596	(uid != (uid_t)-1 && uid != to_sb.st_uid))
597	if (fchown(to_fd, uid, gid) == -1) {
598	serrno = errno;
599	(void)unlink(to_name);
600	errno = serrno;
601	rc = err(EX_OSERR,"%s: chown/chgrp", to_name);
602	goto l_done;
603	}
604
605	if (mode != (to_sb.st_mode & ALLPERMS))
606	if (fchmod(to_fd, mode)) {
607	serrno = errno;
608	(void)unlink(to_name);
609	errno = serrno;
610	rc = err(EX_OSERR, "%s: chmod", to_name);
611	goto l_done;
612	}
613
614	/*
615	* If provided a set of flags, set them, otherwise, preserve the
616	* flags, except for the dump flag.
617	* NFS does not support flags. Ignore EOPNOTSUPP flags if we're just
618	* trying to turn off UF_NODUMP. If we're trying to set real flags,
619	* then warn if the the fs doesn't support it, otherwise fail.
620	*/
621	#ifdef UF_IMMUTABLE
622	if (!devnull && (flags & SETFLAGS \|\|
623	(from_sb.st_flags & ~UF_NODUMP) != to_sb.st_flags) &&
624	fchflags(to_fd,
625	flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) {
626	if (flags & SETFLAGS) {
627	if (errno == EOPNOTSUPP)
628	warn("%s: chflags", to_name);
629	else {
630	serrno = errno;
631	(void)unlink(to_name);
632	errno = serrno;
633	rc = err(EX_OSERR, "%s: chflags", to_name);
634	goto l_done;
635	}
636	}
637	}
638	#endif
639
640	l_done:
641	if (to_fd >= 0)
642	(void)close(to_fd);
643	if (temp_fd >= 0)
644	(void)close(temp_fd);
645	if (!devnull)
646	(void)close(from_fd);
647	return rc;
648	}
649
650	/*
651	* compare --
652	* compare two files; non-zero means files differ
653	*/
654	static int
655	compare(int from_fd, const char *from_name __unused, size_t from_len,
656	int to_fd, const char *to_name __unused, size_t to_len)
657	{
658	char p, q;
659	int rv;
660	int done_compare;
661
662	rv = 0;
663	if (from_len != to_len)
664	return 1;
665
666	if (from_len <= MAX_CMP_SIZE) {
667	#ifdef USE_MMAP
668	done_compare = 0;
669	if (trymmap(from_fd) && trymmap(to_fd)) {
670	p = mmap(NULL, from_len, PROT_READ, MAP_SHARED, from_fd, (off_t)0);
671	if (p == (char *)MAP_FAILED)
672	goto out;
673	q = mmap(NULL, from_len, PROT_READ, MAP_SHARED, to_fd, (off_t)0);
674	if (q == (char *)MAP_FAILED) {
675	munmap(p, from_len);
676	goto out;
677	}
678
679	rv = memcmp(p, q, from_len);
680	munmap(p, from_len);
681	munmap(q, from_len);
682	done_compare = 1;
683	}
684	out:
685	#else
686	(void)p; (void)q;
687	done_compare = 0;
688	#endif
689	if (!done_compare) {
690	char buf1[MAXBSIZE];
691	char buf2[MAXBSIZE];
692	int n1, n2;
693
694	rv = 0;
695	lseek(from_fd, 0, SEEK_SET);
696	lseek(to_fd, 0, SEEK_SET);
697	while (rv == 0) {
698	n1 = read(from_fd, buf1, sizeof(buf1));
699	if (n1 == 0)
700	break; /* EOF */
701	else if (n1 > 0) {
702	n2 = read(to_fd, buf2, n1);
703	if (n2 == n1)
704	rv = memcmp(buf1, buf2, n1);
705	else
706	rv = 1; /* out of sync */
707	} else
708	rv = 1; /* read failure */
709	}
710	lseek(from_fd, 0, SEEK_SET);
711	lseek(to_fd, 0, SEEK_SET);
712	}
713	} else
714	rv = 1; /* don't bother in this case */
715
716	return rv;
717	}
718
719	/*
720	* create_tempfile --
721	* create a temporary file based on path and open it
722	*/
723	int
724	create_tempfile(const char path, char temp, size_t tsize)
725	{
726	char *p;
727
728	(void)strncpy(temp, path, tsize);
729	temp[tsize - 1] = '\0';
730	if ((p = strrchr(temp, '/')) != NULL)
731	p++;
732	else
733	p = temp;
734	(void)strncpy(p, "INS@XXXX", &temp[tsize - 1] - p);
735	temp[tsize - 1] = '\0';
736	return (mkstemp(temp));
737	}
738
739	/*
740	* create_newfile --
741	* create a new file, overwriting an existing one if necessary
742	*/
743	int
744	create_newfile(const char path, int target, struct stat sbp)
745	{
746	char backup[MAXPATHLEN];
747	int saved_errno = 0;
748	int newfd;
749
750	if (target) {
751	/*
752	* Unlink now... avoid ETXTBSY errors later. Try to turn
753	* off the append/immutable bits -- if we fail, go ahead,
754	* it might work.
755	*/
756	#ifdef UF_IMMUTABLE
757	if (sbp->st_flags & NOCHANGEBITS)
758	(void)chflags(path, sbp->st_flags & ~NOCHANGEBITS);
759	#endif
760
761	if (dobackup) {
762	if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s",
763	path, suffix) != strlen(path) + strlen(suffix)) {
764	errx(EX_OSERR, "%s: backup filename too long",
765	path);
766	errno = ENAMETOOLONG;
767	return -1;
768	}
769	(void)snprintf(backup, MAXPATHLEN, "%s%s",
770	path, suffix);
771	if (verbose)
772	(void)printf("install: %s -> %s\n",
773	path, backup);
774	if (rename(path, backup) < 0) {
775	err(EX_OSERR, "rename: %s to %s", path, backup);
776	return -1;
777	}
778	} else
779	if (unlink(path) < 0)
780	saved_errno = errno;
781	}
782
783	newfd = open(path, O_CREAT \| O_RDWR \| O_TRUNC \| O_BINARY, S_IRUSR \| S_IWUSR);
784	if (newfd < 0 && saved_errno != 0)
785	errno = saved_errno;
786	return newfd;
787	}
788
789	/*
790	* copy --
791	* copy from one file to another
792	*/
793	static int
794	copy(int from_fd, const char from_name, int to_fd, const char to_name,
795	off_t size)
796	{
797	int nr, nw;
798	int serrno;
799	char *p, buf[MAXBSIZE];
800	int done_copy;
801
802	/* Rewind file descriptors. */
803	if (lseek(from_fd, (off_t)0, SEEK_SET) == (off_t)-1)
804	return err(EX_OSERR, "lseek: %s", from_name);
805	if (lseek(to_fd, (off_t)0, SEEK_SET) == (off_t)-1)
806	return err(EX_OSERR, "lseek: %s", to_name);
807
808	/*
809	* Mmap and write if less than 8M (the limit is so we don't totally
810	* trash memory on big files. This is really a minor hack, but it
811	* wins some CPU back.
812	*/
813	done_copy = 0;
814	#ifdef USE_MMAP
815	if (size <= 8 * 1048576 && trymmap(from_fd) &&
816	(p = mmap(NULL, (size_t)size, PROT_READ, MAP_SHARED,
817	from_fd, (off_t)0)) != (char *)MAP_FAILED) {
818	if ((nw = write(to_fd, p, size)) != size) {
819	serrno = errno;
820	(void)unlink(to_name);
821	errno = nw > 0 ? EIO : serrno;
822	err(EX_OSERR, "%s", to_name);
823	}
824	done_copy = 1;
825	}
826	#else
827	(void)p;
828	#endif
829	if (!done_copy) {
830	while ((nr = read(from_fd, buf, sizeof(buf))) > 0)
831	if ((nw = write(to_fd, buf, nr)) != nr) {
832	serrno = errno;
833	(void)unlink(to_name);
834	errno = nw > 0 ? EIO : serrno;
835	return err(EX_OSERR, "%s", to_name);
836	}
837	if (nr != 0) {
838	serrno = errno;
839	(void)unlink(to_name);
840	errno = serrno;
841	return err(EX_OSERR, "%s", from_name);
842	}
843	}
844	return EX_OK;
845	}
846
847	/*
848	* strip --
849	* use strip(1) to strip the target file
850	*/
851	static int
852	strip(const char *to_name)
853	{
854	#if defined(__EMX__) \|\| defined(_MSC_VER)
855	const char *stripbin = getenv("STRIPBIN");
856	if (stripbin == NULL)
857	stripbin = "strip";
858	return spawnlp(P_WAIT, stripbin, stripbin, to_name, NULL);
859	#else
860	const char *stripbin;
861	int serrno, status;
862	pid_t pid;
863
864	pid = fork();
865	switch (pid) {
866	case -1:
867	serrno = errno;
868	(void)unlink(to_name);
869	errno = serrno;
870	err(EX_TEMPFAIL, "fork");
871	case 0:
872	stripbin = getenv("STRIPBIN");
873	if (stripbin == NULL)
874	stripbin = "strip";
875	execlp(stripbin, stripbin, to_name, (char *)NULL);
876	err(EX_OSERR, "exec(%s)", stripbin);
877	default:
878	if (waitpid(pid, &status, 0) == -1 \|\| status) {
879	serrno = errno;
880	(void)unlink(to_name);
881	errno = serrno;
882	err(EX_SOFTWARE, "waitpid");
883	/* NOTREACHED */
884	}
885	}
886	#endif
887	}
888
889	/*
890	* install_dir --
891	* build directory heirarchy
892	*/
893	static int
894	install_dir(char *path)
895	{
896	char *p;
897	struct stat sb;
898	int ch;
899
900	for (p = path;; ++p)
901	if (!p \|\| (p != path && p == '/')) {
902	ch = *p;
903	*p = '\0';
904	if (stat(path, &sb)) {
905	if (errno != ENOENT \|\| mkdir(path, 0755) < 0) {
906	return err(EX_OSERR, "mkdir %s", path);
907	/* NOTREACHED */
908	} else if (verbose)
909	(void)printf("install: mkdir %s\n",
910	path);
911	} else if (!S_ISDIR(sb.st_mode))
912	return errx(EX_OSERR, "%s exists but is not a directory", path);
913	if (!(*p = ch))
914	break;
915	}
916
917	if ((gid != (gid_t)-1 \|\| uid != (uid_t)-1) && chown(path, uid, gid))
918	warn("chown %u:%u %s", uid, gid, path);
919	if (chmod(path, mode))
920	warn("chmod %o %s", mode, path);
921	return EX_OK;
922	}
923
924	/*
925	* usage --
926	* print a usage message and die
927	*/
928	static int
929	usage()
930	{
931	(void)fprintf(stderr,
932	"usage: install [-bCcpSsv] [-B suffix] [-f flags] [-g group] [-m mode]\n"
933	" [-o owner] file1 file2\n"
934	" install [-bCcpSsv] [-B suffix] [-f flags] [-g group] [-m mode]\n"
935	" [-o owner] file1 ... fileN directory\n"
936	" install -d [-v] [-g group] [-m mode] [-o owner] directory ...\n");
937	return EX_USAGE;
938	}
939
940	#ifdef USE_MMAP
941	/*
942	* trymmap --
943	* return true (1) if mmap should be tried, false (0) if not.
944	*/
945	static int
946	trymmap(int fd)
947	{
948	/*
949	* The ifdef is for bootstrapping - f_fstypename doesn't exist in
950	* pre-Lite2-merge systems.
951	*/
952	#ifdef MFSNAMELEN
953	struct statfs stfs;
954
955	if (nommap \|\| fstatfs(fd, &stfs) != 0)
956	return (0);
957	if (strcmp(stfs.f_fstypename, "ufs") == 0 \|\|
958	strcmp(stfs.f_fstypename, "cd9660") == 0)
959	return (1);
960	#endif
961	return (0);
962	}
963	#endif

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source: kBuild/trunk/src/gmakenew/kmkbuiltin/install.c@ 942

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