nspr-4.8.6/mozilla/nsprpub/config/nsinstall.c - nest-learning-thermostat/5.1.7/nspr - Git at Google

 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  *
  * The contents of this file are subject to the Mozilla Public License Version
  * 1.1 (the "License"); you may not use this file except in compliance with
  * the License. You may obtain a copy of the License at
  * http://www.mozilla.org/MPL/
  *
  * Software distributed under the License is distributed on an "AS IS" basis,
  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  * for the specific language governing rights and limitations under the
  * License.
  *
  * The Original Code is the Netscape Portable Runtime (NSPR).
  *
  * The Initial Developer of the Original Code is
  * Netscape Communications Corporation.
  * Portions created by the Initial Developer are Copyright (C) 1998-2000
  * the Initial Developer. All Rights Reserved.
  *
  * Contributor(s):
  *
  * Alternatively, the contents of this file may be used under the terms of
  * either the GNU General Public License Version 2 or later (the "GPL"), or
  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  * in which case the provisions of the GPL or the LGPL are applicable instead
  * of those above. If you wish to allow use of your version of this file only
  * under the terms of either the GPL or the LGPL, and not to allow others to
  * use your version of this file under the terms of the MPL, indicate your
  * decision by deleting the provisions above and replace them with the notice
  * and other provisions required by the GPL or the LGPL. If you do not delete
  * the provisions above, a recipient may use your version of this file under
  * the terms of any one of the MPL, the GPL or the LGPL.
  *
  * ***** END LICENSE BLOCK ***** */

 /*
 ** Netscape portable install command.
 **
 ** Brendan Eich, 7/20/95
 */
 #include <stdio.h>  /* OSF/1 requires this before grp.h, so put it first */
 #include <assert.h>
 #include <fcntl.h>
 #include <grp.h>
 #include <pwd.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <utime.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <dirent.h>
 #include <errno.h>
 #include <stdarg.h>
 #ifdef USE_REENTRANT_LIBC
 #include "libc_r.h"
 #endif /* USE_REENTRANT_LIBC */

 #include "pathsub.h"

 #define HAVE_FCHMOD

 #if defined(BEOS)
 #undef HAVE_FCHMOD
 #endif

 /*
  * Does getcwd() take NULL as the first argument and malloc
  * the result buffer?
  */
 #if !defined(DARWIN) && !defined(NEXTSTEP)
 #define GETCWD_CAN_MALLOC
 #endif

 #ifdef NEXTSTEP
 #include <bsd/libc.h>

 /*
 ** balazs.pataki@sztaki.hu: The getcwd is broken in NEXTSTEP (returns 0),
 ** when called on a mounted fs. Did anyone notice this? Here's an ugly
 ** workaround ...
 */
 #define getcwd(b,s)   my_getcwd(b,s)

 static char *
 my_getcwd (char *buf, size_t size)
 {
     FILE *pwd = popen("pwd", "r");
     char *result = fgets(buf, size, pwd);

     if (result) {
         buf[strlen(buf)-1] = '\0';
     }
     pclose (pwd);
     return buf;
 }
 #endif /* NEXTSTEP */

 #if defined(LINUX) || defined(__GNU__) || defined(__GLIBC__)
 #include <getopt.h>
 #endif

 #if defined(SCO) || defined(UNIXWARE) || defined(SNI) || defined(NCR) || defined(NEC) || defined(NEXTSTEP)
 #if !defined(S_ISLNK) && defined(S_IFLNK)
 #define S_ISLNK(a)	(((a) & S_IFMT) == S_IFLNK)
 #endif
 #endif

 #if defined(SNI)
 extern int fchmod(int fildes, mode_t mode);
 #endif

 #ifdef QNX
 #define d_ino d_stat.st_ino
 #endif

 static void
 usage(void)
 {
     fprintf(stderr,
 	"usage: %s [-C cwd] [-L linkprefix] [-m mode] [-o owner] [-g group]\n"
 	"       %*s [-DdltR] file [file ...] directory\n",
 	program, (int)strlen(program), "");
     exit(2);
 }

 static int
 mkdirs(char *path, mode_t mode)
 {
     char *cp;
     struct stat sb;
     int res;

     while (*path == '/' && path[1] == '/')
 	path++;
     for (cp = strrchr(path, '/'); cp && cp != path && cp[-1] == '/'; cp--)
 	;
     if (cp && cp != path) {
 	*cp = '\0';
 	if ((stat(path, &sb) < 0 || !S_ISDIR(sb.st_mode)) &&
 	    mkdirs(path, mode) < 0) {
 	    return -1;
 	}
 	*cp = '/';
     }
     res = mkdir(path, mode);
     if ((res != 0) && (errno == EEXIST))
 	return 0;
      else
 	return res;
 }

 static uid_t
 touid(char *owner)
 {
     struct passwd *pw;
     uid_t uid;
     char *cp;

     pw = getpwnam(owner);
     if (pw)
 	return pw->pw_uid;
     uid = strtol(owner, &cp, 0);
     if (uid == 0 && cp == owner)
 	fail("cannot find uid for %s", owner);
     return uid;
 }

 static gid_t
 togid(char *group)
 {
     struct group *gr;
     gid_t gid;
     char *cp;

     gr = getgrnam(group);
     if (gr)
 	return gr->gr_gid;
     gid = strtol(group, &cp, 0);
     if (gid == 0 && cp == group)
 	fail("cannot find gid for %s", group);
     return gid;
 }

 int
 main(int argc, char **argv)
 {
     int onlydir, dodir, dolink, dorelsymlink, dotimes, opt, len, lplen, tdlen, bnlen, exists, fromfd, tofd, cc, wc;
     mode_t mode = 0755;
     char *linkprefix, *owner, *group, *cp, *cwd, *todir, *toname, *name, *base, *linkname, *bp, buf[BUFSIZ];
     uid_t uid;
     gid_t gid;
     struct stat sb, tosb;
     struct utimbuf utb;

     program = argv[0];
     cwd = linkname = linkprefix = owner = group = 0;
     onlydir = dodir = dolink = dorelsymlink = dotimes = lplen = 0;

     while ((opt = getopt(argc, argv, "C:DdlL:Rm:o:g:t")) != EOF) {
 	switch (opt) {
 	  case 'C':
 	    cwd = optarg;
 	    break;
 	  case 'D':
 	    onlydir = 1;
 	    break;
 	  case 'd':
 	    dodir = 1;
 	    break;
 	  case 'l':
 	    dolink = 1;
 	    break;
 	  case 'L':
 	    linkprefix = optarg;
 	    lplen = strlen(linkprefix);
 	    dolink = 1;
 	    break;
 	  case 'R':
 	    dolink = dorelsymlink = 1;
 	    break;
 	  case 'm':
 	    mode = strtoul(optarg, &cp, 8);
 	    if (mode == 0 && cp == optarg)
 		usage();
 	    break;
 	  case 'o':
 	    owner = optarg;
 	    break;
 	  case 'g':
 	    group = optarg;
 	    break;
 	  case 't':
 	    dotimes = 1;
 	    break;
 	  default:
 	    usage();
 	}
     }

     argc -= optind;
     argv += optind;
     if (argc < 2 - onlydir)
 	usage();

     todir = argv[argc-1];
     if ((stat(todir, &sb) < 0 || !S_ISDIR(sb.st_mode)) &&
 	mkdirs(todir, 0777) < 0) {
 	fail("cannot make directory %s", todir);
     }
     if (onlydir)
 	return 0;

     if (!cwd) {
 #ifdef GETCWD_CAN_MALLOC
 	cwd = getcwd(0, PATH_MAX);
 #else
 	cwd = malloc(PATH_MAX + 1);
 	cwd = getcwd(cwd, PATH_MAX);
 #endif
     }
     xchdir(todir);
 #ifdef GETCWD_CAN_MALLOC
     todir = getcwd(0, PATH_MAX);
 #else
     todir = malloc(PATH_MAX + 1);
     todir = getcwd(todir, PATH_MAX);
 #endif
     tdlen = strlen(todir);
     xchdir(cwd);
     tdlen = strlen(todir);

     uid = owner ? touid(owner) : -1;
     gid = group ? togid(group) : -1;

     while (--argc > 0) {
 	name = *argv++;
 	len = strlen(name);
 	base = xbasename(name);
 	bnlen = strlen(base);
 	toname = (char*)xmalloc(tdlen + 1 + bnlen + 1);
 	sprintf(toname, "%s/%s", todir, base);
 	exists = (lstat(toname, &tosb) == 0);

 	if (dodir) {
 	    /* -d means create a directory, always */
 	    if (exists && !S_ISDIR(tosb.st_mode)) {
 		(void) unlink(toname);
 		exists = 0;
 	    }
 	    if (!exists && mkdir(toname, mode) < 0)
 		fail("cannot make directory %s", toname);
 	    if ((owner || group) && chown(toname, uid, gid) < 0)
 		fail("cannot change owner of %s", toname);
 	} else if (dolink) {
 	    if (*name == '/') {
 		/* source is absolute pathname, link to it directly */
 		linkname = 0;
 	    } else {
 		if (linkprefix) {
 		    /* -L implies -l and prefixes names with a $cwd arg. */
 		    len += lplen + 1;
 		    linkname = (char*)xmalloc(len + 1);
 		    sprintf(linkname, "%s/%s", linkprefix, name);
 		} else if (dorelsymlink) {
 		    /* Symlink the relative path from todir to source name. */
 		    linkname = (char*)xmalloc(PATH_MAX);

 		    if (*todir == '/') {
 			/* todir is absolute: skip over common prefix. */
 			lplen = relatepaths(todir, cwd, linkname);
 			strcpy(linkname + lplen, name);
 		    } else {
 			/* todir is named by a relative path: reverse it. */
 			reversepath(todir, name, len, linkname);
 			xchdir(cwd);
 		    }

 		    len = strlen(linkname);
 		}
 		name = linkname;
 	    }

 	    /* Check for a pre-existing symlink with identical content. */
 	    if (exists &&
 		(!S_ISLNK(tosb.st_mode) ||
 		 readlink(toname, buf, sizeof buf) != len ||
 		 strncmp(buf, name, len) != 0)) {
 		(void) (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
 		exists = 0;
 	    }
 	    if (!exists && symlink(name, toname) < 0)
 		fail("cannot make symbolic link %s", toname);
 #ifdef HAVE_LCHOWN
 	    if ((owner || group) && lchown(toname, uid, gid) < 0)
 		fail("cannot change owner of %s", toname);
 #endif

 	    if (linkname) {
 		free(linkname);
 		linkname = 0;
 	    }
 	} else {
 	    /* Copy from name to toname, which might be the same file. */
 	    fromfd = open(name, O_RDONLY);
 	    if (fromfd < 0 || fstat(fromfd, &sb) < 0)
 		fail("cannot access %s", name);
 	    if (exists && (!S_ISREG(tosb.st_mode) || access(toname, W_OK) < 0))
 		(void) (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
 	    tofd = open(toname, O_CREAT | O_WRONLY, 0666);
 	    if (tofd < 0)
 		fail("cannot create %s", toname);

 	    bp = buf;
 	    while ((cc = read(fromfd, bp, sizeof buf)) > 0) {
 		while ((wc = write(tofd, bp, cc)) > 0) {
 		    if ((cc -= wc) == 0)
 			break;
 		    bp += wc;
 		}
 		if (wc < 0)
 		    fail("cannot write to %s", toname);
 	    }
 	    if (cc < 0)
 		fail("cannot read from %s", name);

 	    if (ftruncate(tofd, sb.st_size) < 0)
 		fail("cannot truncate %s", toname);
 	    if (dotimes) {
 		utb.actime = sb.st_atime;
 		utb.modtime = sb.st_mtime;
 		if (utime(toname, &utb) < 0)
 		    fail("cannot set times of %s", toname);
 	    }
 #ifdef HAVE_FCHMOD
 	    if (fchmod(tofd, mode) < 0)
 #else
 	    if (chmod(toname, mode) < 0)
 #endif
 		fail("cannot change mode of %s", toname);
 	    if ((owner || group) && fchown(tofd, uid, gid) < 0)
 		fail("cannot change owner of %s", toname);

 	    /* Must check for delayed (NFS) write errors on close. */
 	    if (close(tofd) < 0)
 		fail("cannot write to %s", toname);
 	    close(fromfd);
 	}

 	free(toname);
     }

     free(cwd);
     free(todir);
     return 0;
 }

 /*
 ** Pathname subroutines.
 **
 ** Brendan Eich, 8/29/95
 */

 char *program;

 void
 fail(char *format, ...)
 {
     int error;
     va_list ap;

 #ifdef USE_REENTRANT_LIBC
     R_STRERROR_INIT_R();
 #endif

     error = errno;
     fprintf(stderr, "%s: ", program);
     va_start(ap, format);
     vfprintf(stderr, format, ap);
     va_end(ap);
     if (error)

 #ifdef USE_REENTRANT_LIBC
     R_STRERROR_R(errno);
 	fprintf(stderr, ": %s", r_strerror_r);
 #else
 	fprintf(stderr, ": %s", strerror(errno));
 #endif

     putc('\n', stderr);
     exit(1);
 }

 char *
 getcomponent(char *path, char *name)
 {
     if (*path == '\0')
 	return 0;
     if (*path == '/') {
 	*name++ = '/';
     } else {
 	do {
 	    *name++ = *path++;
 	} while (*path != '/' && *path != '\0');
     }
     *name = '\0';
     while (*path == '/')
 	path++;
     return path;
 }

 #ifdef UNIXWARE_READDIR_BUFFER_TOO_SMALL
 /* Sigh.  The static buffer in Unixware's readdir is too small. */
 struct dirent * readdir(DIR *d)
 {
         static struct dirent *buf = NULL;
 #define MAX_PATH_LEN 1024


         if(buf == NULL)
                 buf = (struct dirent *) malloc(sizeof(struct dirent) + MAX_PATH_LEN)
 ;
         return(readdir_r(d, buf));
 }
 #endif

 char *
 ino2name(ino_t ino, char *dir)
 {
     DIR *dp;
     struct dirent *ep;
     char *name;

     dp = opendir("..");
     if (!dp)
 	fail("cannot read parent directory");
     for (;;) {
 	if (!(ep = readdir(dp)))
 	    fail("cannot find current directory");
 	if (ep->d_ino == ino)
 	    break;
     }
     name = xstrdup(ep->d_name);
     closedir(dp);
     return name;
 }

 void *
 xmalloc(size_t size)
 {
     void *p = malloc(size);
     if (!p)
 	fail("cannot allocate %u bytes", size);
     return p;
 }

 char *
 xstrdup(char *s)
 {
     return strcpy((char*)xmalloc(strlen(s) + 1), s);
 }

 char *
 xbasename(char *path)
 {
     char *cp;

     while ((cp = strrchr(path, '/')) && cp[1] == '\0')
 	*cp = '\0';
     if (!cp) return path;
     return cp + 1;
 }

 void
 xchdir(char *dir)
 {
     if (chdir(dir) < 0)
 	fail("cannot change directory to %s", dir);
 }

 int
 relatepaths(char *from, char *to, char *outpath)
 {
     char *cp, *cp2;
     int len;
     char buf[NAME_MAX];

     assert(*from == '/' && *to == '/');
     for (cp = to, cp2 = from; *cp == *cp2; cp++, cp2++)
 	if (*cp == '\0')
 	    break;
     while (cp[-1] != '/')
 	cp--, cp2--;
     if (cp - 1 == to) {
 	/* closest common ancestor is /, so use full pathname */
 	len = strlen(strcpy(outpath, to));
 	if (outpath[len] != '/') {
 	    outpath[len++] = '/';
 	    outpath[len] = '\0';
 	}
     } else {
 	len = 0;
 	while ((cp2 = getcomponent(cp2, buf)) != 0) {
 	    strcpy(outpath + len, "../");
 	    len += 3;
 	}
 	while ((cp = getcomponent(cp, buf)) != 0) {
 	    sprintf(outpath + len, "%s/", buf);
 	    len += strlen(outpath + len);
 	}
     }
     return len;
 }

 void
 reversepath(char *inpath, char *name, int len, char *outpath)
 {
     char *cp, *cp2;
     char buf[NAME_MAX];
     struct stat sb;

     cp = strcpy(outpath + PATH_MAX - (len + 1), name);
     cp2 = inpath;
     while ((cp2 = getcomponent(cp2, buf)) != 0) {
 	if (strcmp(buf, ".") == 0)
 	    continue;
 	if (strcmp(buf, "..") == 0) {
 	    if (stat(".", &sb) < 0)
 		fail("cannot stat current directory");
 	    name = ino2name(sb.st_ino, "..");
 	    len = strlen(name);
 	    cp -= len + 1;
 	    strcpy(cp, name);
 	    cp[len] = '/';
 	    free(name);
 	    xchdir("..");
 	} else {
 	    cp -= 3;
 	    strncpy(cp, "../", 3);
 	    xchdir(buf);
 	}
     }
     strcpy(outpath, cp);
 }
	/* -- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -- */
	/* *** BEGIN LICENSE BLOCK ***
	* Version: MPL 1.1/GPL 2.0/LGPL 2.1
	*
	* The contents of this file are subject to the Mozilla Public License Version
	* 1.1 (the "License"); you may not use this file except in compliance with
	* the License. You may obtain a copy of the License at
	* http://www.mozilla.org/MPL/
	*
	* Software distributed under the License is distributed on an "AS IS" basis,
	* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
	* for the specific language governing rights and limitations under the
	* License.
	*
	* The Original Code is the Netscape Portable Runtime (NSPR).
	*
	* The Initial Developer of the Original Code is
	* Netscape Communications Corporation.
	* Portions created by the Initial Developer are Copyright (C) 1998-2000
	* the Initial Developer. All Rights Reserved.
	*
	* Contributor(s):
	*
	* Alternatively, the contents of this file may be used under the terms of
	* either the GNU General Public License Version 2 or later (the "GPL"), or
	* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
	* in which case the provisions of the GPL or the LGPL are applicable instead
	* of those above. If you wish to allow use of your version of this file only
	* under the terms of either the GPL or the LGPL, and not to allow others to
	* use your version of this file under the terms of the MPL, indicate your
	* decision by deleting the provisions above and replace them with the notice
	* and other provisions required by the GPL or the LGPL. If you do not delete
	* the provisions above, a recipient may use your version of this file under
	* the terms of any one of the MPL, the GPL or the LGPL.
	*
	* *** END LICENSE BLOCK *** */

	/*
	** Netscape portable install command.
	**
	** Brendan Eich, 7/20/95
	*/
	#include <stdio.h> /* OSF/1 requires this before grp.h, so put it first */
	#include <assert.h>
	#include <fcntl.h>
	#include <grp.h>
	#include <pwd.h>
	#include <stdlib.h>
	#include <string.h>
	#include <unistd.h>
	#include <utime.h>
	#include <sys/types.h>
	#include <sys/stat.h>
	#include <dirent.h>
	#include <errno.h>
	#include <stdarg.h>
	#ifdef USE_REENTRANT_LIBC
	#include "libc_r.h"
	#endif /* USE_REENTRANT_LIBC */

	#include "pathsub.h"

	#define HAVE_FCHMOD

	#if defined(BEOS)
	#undef HAVE_FCHMOD
	#endif

	/*
	* Does getcwd() take NULL as the first argument and malloc
	* the result buffer?
	*/
	#if !defined(DARWIN) && !defined(NEXTSTEP)
	#define GETCWD_CAN_MALLOC
	#endif

	#ifdef NEXTSTEP
	#include <bsd/libc.h>

	/*
	** balazs.pataki@sztaki.hu: The getcwd is broken in NEXTSTEP (returns 0),
	** when called on a mounted fs. Did anyone notice this? Here's an ugly
	** workaround ...
	*/
	#define getcwd(b,s) my_getcwd(b,s)

	static char *
	my_getcwd (char *buf, size_t size)
	{
	FILE *pwd = popen("pwd", "r");
	char *result = fgets(buf, size, pwd);

	if (result) {
	buf[strlen(buf)-1] = '\0';
	}
	pclose (pwd);
	return buf;
	}
	#endif /* NEXTSTEP */

	#if defined(LINUX) \|\| defined(__GNU__) \|\| defined(__GLIBC__)
	#include <getopt.h>
	#endif

	#if defined(SCO) \|\| defined(UNIXWARE) \|\| defined(SNI) \|\| defined(NCR) \|\| defined(NEC) \|\| defined(NEXTSTEP)
	#if !defined(S_ISLNK) && defined(S_IFLNK)
	#define S_ISLNK(a) (((a) & S_IFMT) == S_IFLNK)
	#endif
	#endif

	#if defined(SNI)
	extern int fchmod(int fildes, mode_t mode);
	#endif

	#ifdef QNX
	#define d_ino d_stat.st_ino
	#endif

	static void
	usage(void)
	{
	fprintf(stderr,
	"usage: %s [-C cwd] [-L linkprefix] [-m mode] [-o owner] [-g group]\n"
	" %*s [-DdltR] file [file ...] directory\n",
	program, (int)strlen(program), "");
	exit(2);
	}

	static int
	mkdirs(char *path, mode_t mode)
	{
	char *cp;
	struct stat sb;
	int res;

	while (*path == '/' && path[1] == '/')
	path++;
	for (cp = strrchr(path, '/'); cp && cp != path && cp[-1] == '/'; cp--)
	;
	if (cp && cp != path) {
	*cp = '\0';
	if ((stat(path, &sb) < 0 \|\| !S_ISDIR(sb.st_mode)) &&
	mkdirs(path, mode) < 0) {
	return -1;
	}
	*cp = '/';
	}
	res = mkdir(path, mode);
	if ((res != 0) && (errno == EEXIST))
	return 0;
	else
	return res;
	}

	static uid_t
	touid(char *owner)
	{
	struct passwd *pw;
	uid_t uid;
	char *cp;

	pw = getpwnam(owner);
	if (pw)
	return pw->pw_uid;
	uid = strtol(owner, &cp, 0);
	if (uid == 0 && cp == owner)
	fail("cannot find uid for %s", owner);
	return uid;
	}

	static gid_t
	togid(char *group)
	{
	struct group *gr;
	gid_t gid;
	char *cp;

	gr = getgrnam(group);
	if (gr)
	return gr->gr_gid;
	gid = strtol(group, &cp, 0);
	if (gid == 0 && cp == group)
	fail("cannot find gid for %s", group);
	return gid;
	}

	int
	main(int argc, char **argv)
	{
	int onlydir, dodir, dolink, dorelsymlink, dotimes, opt, len, lplen, tdlen, bnlen, exists, fromfd, tofd, cc, wc;
	mode_t mode = 0755;
	char linkprefix, owner, group, cp, cwd, todir, toname, name, base, linkname, *bp, buf[BUFSIZ];
	uid_t uid;
	gid_t gid;
	struct stat sb, tosb;
	struct utimbuf utb;

	program = argv[0];
	cwd = linkname = linkprefix = owner = group = 0;
	onlydir = dodir = dolink = dorelsymlink = dotimes = lplen = 0;

	while ((opt = getopt(argc, argv, "C:DdlL:Rm:o:g:t")) != EOF) {
	switch (opt) {
	case 'C':
	cwd = optarg;
	break;
	case 'D':
	onlydir = 1;
	break;
	case 'd':
	dodir = 1;
	break;
	case 'l':
	dolink = 1;
	break;
	case 'L':
	linkprefix = optarg;
	lplen = strlen(linkprefix);
	dolink = 1;
	break;
	case 'R':
	dolink = dorelsymlink = 1;
	break;
	case 'm':
	mode = strtoul(optarg, &cp, 8);
	if (mode == 0 && cp == optarg)
	usage();
	break;
	case 'o':
	owner = optarg;
	break;
	case 'g':
	group = optarg;
	break;
	case 't':
	dotimes = 1;
	break;
	default:
	usage();
	}
	}

	argc -= optind;
	argv += optind;
	if (argc < 2 - onlydir)
	usage();

	todir = argv[argc-1];
	if ((stat(todir, &sb) < 0 \|\| !S_ISDIR(sb.st_mode)) &&
	mkdirs(todir, 0777) < 0) {
	fail("cannot make directory %s", todir);
	}
	if (onlydir)
	return 0;

	if (!cwd) {
	#ifdef GETCWD_CAN_MALLOC
	cwd = getcwd(0, PATH_MAX);
	#else
	cwd = malloc(PATH_MAX + 1);
	cwd = getcwd(cwd, PATH_MAX);
	#endif
	}
	xchdir(todir);
	#ifdef GETCWD_CAN_MALLOC
	todir = getcwd(0, PATH_MAX);
	#else
	todir = malloc(PATH_MAX + 1);
	todir = getcwd(todir, PATH_MAX);
	#endif
	tdlen = strlen(todir);
	xchdir(cwd);
	tdlen = strlen(todir);

	uid = owner ? touid(owner) : -1;
	gid = group ? togid(group) : -1;

	while (--argc > 0) {
	name = *argv++;
	len = strlen(name);
	base = xbasename(name);
	bnlen = strlen(base);
	toname = (char*)xmalloc(tdlen + 1 + bnlen + 1);
	sprintf(toname, "%s/%s", todir, base);
	exists = (lstat(toname, &tosb) == 0);

	if (dodir) {
	/* -d means create a directory, always */
	if (exists && !S_ISDIR(tosb.st_mode)) {
	(void) unlink(toname);
	exists = 0;
	}
	if (!exists && mkdir(toname, mode) < 0)
	fail("cannot make directory %s", toname);
	if ((owner \|\| group) && chown(toname, uid, gid) < 0)
	fail("cannot change owner of %s", toname);
	} else if (dolink) {
	if (*name == '/') {
	/* source is absolute pathname, link to it directly */
	linkname = 0;
	} else {
	if (linkprefix) {
	/* -L implies -l and prefixes names with a $cwd arg. */
	len += lplen + 1;
	linkname = (char*)xmalloc(len + 1);
	sprintf(linkname, "%s/%s", linkprefix, name);
	} else if (dorelsymlink) {
	/* Symlink the relative path from todir to source name. */
	linkname = (char*)xmalloc(PATH_MAX);

	if (*todir == '/') {
	/* todir is absolute: skip over common prefix. */
	lplen = relatepaths(todir, cwd, linkname);
	strcpy(linkname + lplen, name);
	} else {
	/* todir is named by a relative path: reverse it. */
	reversepath(todir, name, len, linkname);
	xchdir(cwd);
	}

	len = strlen(linkname);
	}
	name = linkname;
	}

	/* Check for a pre-existing symlink with identical content. */
	if (exists &&
	(!S_ISLNK(tosb.st_mode) \|\|
	readlink(toname, buf, sizeof buf) != len \|\|
	strncmp(buf, name, len) != 0)) {
	(void) (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
	exists = 0;
	}
	if (!exists && symlink(name, toname) < 0)
	fail("cannot make symbolic link %s", toname);
	#ifdef HAVE_LCHOWN
	if ((owner \|\| group) && lchown(toname, uid, gid) < 0)
	fail("cannot change owner of %s", toname);
	#endif

	if (linkname) {
	free(linkname);
	linkname = 0;
	}
	} else {
	/* Copy from name to toname, which might be the same file. */
	fromfd = open(name, O_RDONLY);
	if (fromfd < 0 \|\| fstat(fromfd, &sb) < 0)
	fail("cannot access %s", name);
	if (exists && (!S_ISREG(tosb.st_mode) \|\| access(toname, W_OK) < 0))
	(void) (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
	tofd = open(toname, O_CREAT \| O_WRONLY, 0666);
	if (tofd < 0)
	fail("cannot create %s", toname);

	bp = buf;
	while ((cc = read(fromfd, bp, sizeof buf)) > 0) {
	while ((wc = write(tofd, bp, cc)) > 0) {
	if ((cc -= wc) == 0)
	break;
	bp += wc;
	}
	if (wc < 0)
	fail("cannot write to %s", toname);
	}
	if (cc < 0)
	fail("cannot read from %s", name);

	if (ftruncate(tofd, sb.st_size) < 0)
	fail("cannot truncate %s", toname);
	if (dotimes) {
	utb.actime = sb.st_atime;
	utb.modtime = sb.st_mtime;
	if (utime(toname, &utb) < 0)
	fail("cannot set times of %s", toname);
	}
	#ifdef HAVE_FCHMOD
	if (fchmod(tofd, mode) < 0)
	#else
	if (chmod(toname, mode) < 0)
	#endif
	fail("cannot change mode of %s", toname);
	if ((owner \|\| group) && fchown(tofd, uid, gid) < 0)
	fail("cannot change owner of %s", toname);

	/* Must check for delayed (NFS) write errors on close. */
	if (close(tofd) < 0)
	fail("cannot write to %s", toname);
	close(fromfd);
	}

	free(toname);
	}

	free(cwd);
	free(todir);
	return 0;
	}

	/*
	** Pathname subroutines.
	**
	** Brendan Eich, 8/29/95
	*/

	char *program;

	void
	fail(char *format, ...)
	{
	int error;
	va_list ap;

	#ifdef USE_REENTRANT_LIBC
	R_STRERROR_INIT_R();
	#endif

	error = errno;
	fprintf(stderr, "%s: ", program);
	va_start(ap, format);
	vfprintf(stderr, format, ap);
	va_end(ap);
	if (error)

	#ifdef USE_REENTRANT_LIBC
	R_STRERROR_R(errno);
	fprintf(stderr, ": %s", r_strerror_r);
	#else
	fprintf(stderr, ": %s", strerror(errno));
	#endif

	putc('\n', stderr);
	exit(1);
	}

	char *
	getcomponent(char path, char name)
	{
	if (*path == '\0')
	return 0;
	if (*path == '/') {
	*name++ = '/';
	} else {
	do {
	name++ = path++;
	} while (path != '/' && path != '\0');
	}
	*name = '\0';
	while (*path == '/')
	path++;
	return path;
	}

	#ifdef UNIXWARE_READDIR_BUFFER_TOO_SMALL
	/* Sigh. The static buffer in Unixware's readdir is too small. */
	struct dirent * readdir(DIR *d)
	{
	static struct dirent *buf = NULL;
	#define MAX_PATH_LEN 1024


	if(buf == NULL)
	buf = (struct dirent *) malloc(sizeof(struct dirent) + MAX_PATH_LEN)
	;
	return(readdir_r(d, buf));
	}
	#endif

	char *
	ino2name(ino_t ino, char *dir)
	{
	DIR *dp;
	struct dirent *ep;
	char *name;

	dp = opendir("..");
	if (!dp)
	fail("cannot read parent directory");
	for (;;) {
	if (!(ep = readdir(dp)))
	fail("cannot find current directory");
	if (ep->d_ino == ino)
	break;
	}
	name = xstrdup(ep->d_name);
	closedir(dp);
	return name;
	}

	void *
	xmalloc(size_t size)
	{
	void *p = malloc(size);
	if (!p)
	fail("cannot allocate %u bytes", size);
	return p;
	}

	char *
	xstrdup(char *s)
	{
	return strcpy((char*)xmalloc(strlen(s) + 1), s);
	}

	char *
	xbasename(char *path)
	{
	char *cp;

	while ((cp = strrchr(path, '/')) && cp[1] == '\0')
	*cp = '\0';
	if (!cp) return path;
	return cp + 1;
	}

	void
	xchdir(char *dir)
	{
	if (chdir(dir) < 0)
	fail("cannot change directory to %s", dir);
	}

	int
	relatepaths(char from, char to, char *outpath)
	{
	char cp, cp2;
	int len;
	char buf[NAME_MAX];

	assert(from == '/' && to == '/');
	for (cp = to, cp2 = from; cp == cp2; cp++, cp2++)
	if (*cp == '\0')
	break;
	while (cp[-1] != '/')
	cp--, cp2--;
	if (cp - 1 == to) {
	/* closest common ancestor is /, so use full pathname */
	len = strlen(strcpy(outpath, to));
	if (outpath[len] != '/') {
	outpath[len++] = '/';
	outpath[len] = '\0';
	}
	} else {
	len = 0;
	while ((cp2 = getcomponent(cp2, buf)) != 0) {
	strcpy(outpath + len, "../");
	len += 3;
	}
	while ((cp = getcomponent(cp, buf)) != 0) {
	sprintf(outpath + len, "%s/", buf);
	len += strlen(outpath + len);
	}
	}
	return len;
	}

	void
	reversepath(char inpath, char name, int len, char *outpath)
	{
	char cp, cp2;
	char buf[NAME_MAX];
	struct stat sb;

	cp = strcpy(outpath + PATH_MAX - (len + 1), name);
	cp2 = inpath;
	while ((cp2 = getcomponent(cp2, buf)) != 0) {
	if (strcmp(buf, ".") == 0)
	continue;
	if (strcmp(buf, "..") == 0) {
	if (stat(".", &sb) < 0)
	fail("cannot stat current directory");
	name = ino2name(sb.st_ino, "..");
	len = strlen(name);
	cp -= len + 1;
	strcpy(cp, name);
	cp[len] = '/';
	free(name);
	xchdir("..");
	} else {
	cp -= 3;
	strncpy(cp, "../", 3);
	xchdir(buf);
	}
	}
	strcpy(outpath, cp);
	}