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 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 /* 33 * Return pointer to the directory name, stripping off the last 34 * component of the path. 35 * Works similar to /bin/dirname 36 */ 37 38 #pragma weak _dirname = dirname 39 40 #include "lint.h" 41 #include <sys/types.h> 42 #include <string.h> 43 44 char * 45 dirname(char *s) 46 { 47 char *p; 48 49 if (!s || !*s) /* zero or empty argument */ 50 return ("."); 51 52 p = s + strlen(s); 53 while (p != s && *--p == '/') /* trim trailing /s */ 54 ; 55 56 if (p == s && *p == '/') 57 return ("/"); 58 59 while (p != s) 60 if (*--p == '/') { 61 while (*p == '/' && p != s) 62 p--; 63 *++p = '\0'; 64 return (s); 65 } 66 67 return ("."); 68 } 69