1 /* $OpenBSD: pwd.c,v 1.11 2009/10/27 23:59:22 deraadt Exp $ */ 2 /* $NetBSD: pwd.c,v 1.7 1995/03/21 09:08:18 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1991, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <err.h> 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <unistd.h> 37 38 extern char *__progname; 39 40 void usage(void); 41 42 int 43 main(int argc, char *argv[]) 44 { 45 int ch; 46 char *p; 47 48 /* 49 * Flags for pwd are a bit strange. The POSIX 1003.2B/D9 document 50 * has an optional -P flag for physical, which is what this program 51 * will produce by default. The logical flag, -L, should fail, as 52 * there's no way to display a logical path after forking. We don't 53 * document either flag, only adding -P for future portability. 54 */ 55 while ((ch = getopt(argc, argv, "P")) != -1) 56 switch (ch) { 57 case 'P': 58 break; 59 default: 60 usage(); 61 } 62 argc -= optind; 63 argv += optind; 64 65 if (argc != 0) 66 usage(); 67 68 if ((p = getcwd(NULL, (size_t)0)) == NULL) 69 err(1, "getcwd"); 70 (void)printf("%s\n", p); 71 exit(0); 72 } 73 74 void 75 usage(void) 76 { 77 (void)fprintf(stderr, "usage: %s\n", __progname); 78 exit(1); 79 } 80