1 /* $OpenBSD: pwd.c,v 1.4 1996/12/14 12:18:12 mickey 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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static char copyright[] = 39 "@(#) Copyright (c) 1991, 1993, 1994\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)pwd.c 8.3 (Berkeley) 4/1/94"; 46 #else 47 static char rcsid[] = "$OpenBSD: pwd.c,v 1.4 1996/12/14 12:18:12 mickey Exp $"; 48 #endif 49 #endif /* not lint */ 50 51 #include <err.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <unistd.h> 55 56 void usage __P((void)); 57 58 int 59 main(argc, argv) 60 int argc; 61 char *argv[]; 62 { 63 int ch; 64 char *p; 65 66 /* 67 * Flags for pwd are a bit strange. The POSIX 1003.2B/D9 document 68 * has an optional -P flag for physical, which is what this program 69 * will produce by default. The logical flag, -L, should fail, as 70 * there's no way to display a logical path after forking. We don't 71 * document either flag, only adding -P for future portability. 72 */ 73 while ((ch = getopt(argc, argv, "P")) != EOF) 74 switch (ch) { 75 case 'P': 76 break; 77 default: 78 usage(); 79 } 80 argc -= optind; 81 argv += optind; 82 83 if (argc != 0) 84 usage(); 85 86 if ((p = getcwd(NULL, 0)) == NULL) 87 err(1, "getcwd"); 88 (void)printf("%s\n", p); 89 exit(0); 90 } 91 92 void 93 usage() 94 { 95 96 (void)fprintf(stderr, "usage: pwd\n"); 97 exit(1); 98 } 99