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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1989 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984 AT&T */ 28 /* All Rights Reserved */ 29 #pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 1.2 */ 30 31 /*LINTLIBRARY*/ 32 /* 33 * Library routine to GET the Current Working Directory. 34 * arg1 is a pointer to a character buffer into which the 35 * path name of the current directory is placed by the 36 * subroutine. arg1 may be zero, in which case the 37 * subroutine will call malloc to get the required space. 38 * arg2 is the length of the buffer space for the path-name. 39 * If the actual path-name is longer than (arg2-2), or if 40 * the value of arg2 is not at least 3, the subroutine will 41 * return a value of zero, with errno set as appropriate. 42 */ 43 44 #include <stdio.h> 45 #include <sys/errno.h> 46 47 extern FILE *popen(); 48 extern char *malloc(), *fgets(), *strchr(); 49 extern int errno, pclose(); 50 51 char * 52 getcwd(arg1, arg2) 53 char *arg1; 54 int arg2; 55 { 56 FILE *pipe; 57 char *trm; 58 59 if(arg2 <= 0) { 60 errno = EINVAL; 61 return(0); 62 } 63 if(arg1 == 0) 64 if((arg1 = malloc((unsigned)arg2)) == 0) { 65 errno = ENOMEM; 66 return(0); 67 } 68 errno = 0; 69 if((pipe = popen("pwd", "r")) == 0) 70 return(0); 71 (void) fgets(arg1, arg2, pipe); 72 (void) pclose(pipe); 73 trm = strchr(arg1, '\0'); 74 if(*(trm-1) != '\n') { 75 errno = ERANGE; 76 return(0); 77 } 78 *(trm-1) = '\0'; 79 return(arg1); 80 } 81