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 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 23 /* All Rights Reserved */ 24 25 26 /* 27 * Copyright (c) 2001 by Sun Microsystems, Inc. 28 * All rights reserved. 29 */ 30 31 #pragma ident "%Z%%M% %I% %E% SMI" 32 /* 33 * NAME 34 * legal - check existence of file 35 * 36 * SYNOPSIS 37 * int legal(char *file) 38 * 39 * DESCRIPTION 40 * legal() checks to see if "file" is a writable file name. 41 * 42 * Returns: 43 * 0 -> file or directory exists, but is unwriteable 44 * 1 -> file exists writeable 45 * 2 -> file does not exist, but can be created 46 */ 47 48 #include "mail.h" 49 int 50 legal(file) 51 register char *file; 52 { 53 register char *sp; 54 char dfile[MAXFILENAME]; 55 56 /* 57 * If file does not exist then try "." if file name has 58 * no "/". For file names that have a "/", try check 59 * for existence of previous directory. 60 */ 61 if (access(file, A_EXIST) == A_OK) { 62 if (access(file, A_WRITE) == A_OK) 63 return (1); 64 else return (0); 65 } else { 66 if ((sp = strrchr(file, '/')) == NULL) { 67 strcpy(dfile, "."); 68 } else if (sp == file) { 69 strcpy(dfile, "/"); 70 } else { 71 if ((sp - file + 1) > MAXFILENAME) 72 return (0); 73 strncpy(dfile, file, sp - file); 74 dfile[sp - file] = '\0'; 75 } 76 if (access(dfile, A_WRITE) == CERROR) 77 return (0); 78 return (2); 79 } 80 } 81