1139969Simp/*- 21556Srgrimes * Copyright (c) 1991, 1993, 1994 31556Srgrimes * The Regents of the University of California. All rights reserved. 41556Srgrimes * 51556Srgrimes * Redistribution and use in source and binary forms, with or without 61556Srgrimes * modification, are permitted provided that the following conditions 71556Srgrimes * are met: 81556Srgrimes * 1. Redistributions of source code must retain the above copyright 91556Srgrimes * notice, this list of conditions and the following disclaimer. 101556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111556Srgrimes * notice, this list of conditions and the following disclaimer in the 121556Srgrimes * documentation and/or other materials provided with the distribution. 131556Srgrimes * 4. Neither the name of the University nor the names of its contributors 141556Srgrimes * may be used to endorse or promote products derived from this software 151556Srgrimes * without specific prior written permission. 161556Srgrimes * 171556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271556Srgrimes * SUCH DAMAGE. 281556Srgrimes */ 291556Srgrimes 30114433Sobrien#if 0 311556Srgrimes#ifndef lint 3220419Sstevestatic char const copyright[] = 331556Srgrimes"@(#) Copyright (c) 1991, 1993, 1994\n\ 341556Srgrimes The Regents of the University of California. All rights reserved.\n"; 351556Srgrimes#endif /* not lint */ 361556Srgrimes 371556Srgrimes#ifndef lint 3836049Scharnierstatic char sccsid[] = "@(#)pwd.c 8.3 (Berkeley) 4/1/94"; 39114433Sobrien#endif /* not lint */ 4036049Scharnier#endif 4199110Sobrien#include <sys/cdefs.h> 4299110Sobrien__FBSDID("$FreeBSD$"); 431556Srgrimes 4490535Smike#include <sys/param.h> 4590535Smike#include <sys/stat.h> 4690170Smike#include <sys/types.h> 4790170Smike 481556Srgrimes#include <err.h> 4990170Smike#include <errno.h> 501556Srgrimes#include <stdio.h> 511556Srgrimes#include <stdlib.h> 521556Srgrimes#include <unistd.h> 531556Srgrimes 5490170Smikestatic char *getcwd_logical(void); 5590110Simpvoid usage(void); 561556Srgrimes 571556Srgrimesint 5890110Simpmain(int argc, char *argv[]) 591556Srgrimes{ 6096831Stjr int physical; 611556Srgrimes int ch; 621556Srgrimes char *p; 631556Srgrimes 6496857Stjr physical = 1; 6590170Smike while ((ch = getopt(argc, argv, "LP")) != -1) 661556Srgrimes switch (ch) { 6790170Smike case 'L': 6896831Stjr physical = 0; 6990170Smike break; 701556Srgrimes case 'P': 7196831Stjr physical = 1; 721556Srgrimes break; 731556Srgrimes case '?': 741556Srgrimes default: 751556Srgrimes usage(); 761556Srgrimes } 771556Srgrimes argc -= optind; 781556Srgrimes argv += optind; 791556Srgrimes 8096831Stjr if (argc != 0) 811556Srgrimes usage(); 821556Srgrimes 8396831Stjr /* 8496831Stjr * If we're trying to find the logical current directory and that 8596831Stjr * fails, behave as if -P was specified. 8696831Stjr */ 8796831Stjr if ((!physical && (p = getcwd_logical()) != NULL) || 8896831Stjr (p = getcwd(NULL, 0)) != NULL) 8996831Stjr printf("%s\n", p); 9096831Stjr else 9190170Smike err(1, "."); 9290170Smike 931556Srgrimes exit(0); 941556Srgrimes} 951556Srgrimes 961556Srgrimesvoid 9790110Simpusage(void) 981556Srgrimes{ 991556Srgrimes 100141578Sru (void)fprintf(stderr, "usage: pwd [-L | -P]\n"); 10190170Smike exit(1); 1021556Srgrimes} 10390170Smike 10490170Smikestatic char * 10590170Smikegetcwd_logical(void) 10690170Smike{ 107117078Skan struct stat lg, phy; 10890170Smike char *pwd; 10990170Smike 11090170Smike /* 11190170Smike * Check that $PWD is an absolute logical pathname referring to 11290170Smike * the current working directory. 11390170Smike */ 11490170Smike if ((pwd = getenv("PWD")) != NULL && *pwd == '/') { 115117078Skan if (stat(pwd, &lg) == -1 || stat(".", &phy) == -1) 11690170Smike return (NULL); 117117078Skan if (lg.st_dev == phy.st_dev && lg.st_ino == phy.st_ino) 11890170Smike return (pwd); 11990170Smike } 12090170Smike 12190170Smike errno = ENOENT; 12290170Smike return (NULL); 12390170Smike} 124