1 /* 2 * Copyright (c) 1989, 1991, 1993, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/lib/libc/gen/getcwd.c,v 1.18 1999/09/28 13:24:13 marcel Exp $ 30 * 31 * @(#)getcwd.c 8.5 (Berkeley) 2/7/95 32 */ 33 34 #include <sys/param.h> 35 #include <errno.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <unistd.h> 39 40 int __getcwd(char *pt, size_t size); 41 42 char * 43 getcwd(char *pt, size_t size) 44 { 45 int allocated = 0, ret; 46 47 /* 48 * If no buffer specified by the user, allocate one as necessary. 49 */ 50 if (pt == NULL) { 51 size = MAXPATHLEN; 52 if ((pt = malloc(MAXPATHLEN)) == NULL) 53 return(NULL); 54 allocated = 1; 55 } 56 ret = __getcwd(pt, size); 57 if (ret == 0) 58 return (pt); 59 if (allocated) 60 free(pt); 61 return (NULL); 62 } 63 64 char * 65 getwd(char *buf) 66 { 67 char *p; 68 69 if ((p = getcwd(buf, MAXPATHLEN)) != 0) 70 return(p); 71 strcpy(buf, strerror(errno)); 72 return(NULL); 73 } 74