1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * Return pointer to the directory name, stripping off the last 32 * component of the path. 33 * Works similar to /bin/dirname 34 */ 35 36 #pragma weak _dirname = dirname 37 38 #include "lint.h" 39 #include <sys/types.h> 40 #include <string.h> 41 42 char * 43 dirname(char *s) 44 { 45 char *p; 46 47 if (!s || !*s) /* zero or empty argument */ 48 return ("."); 49 50 p = s + strlen(s); 51 while (p != s && *--p == '/') /* trim trailing /s */ 52 ; 53 54 if (p == s && *p == '/') 55 return ("/"); 56 57 while (p != s) 58 if (*--p == '/') { 59 while (*p == '/' && p != s) 60 p--; 61 *++p = '\0'; 62 return (s); 63 } 64 65 return ("."); 66 } 67