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 /* 32 * NAME 33 * legal - check existence of file 34 * 35 * SYNOPSIS 36 * int legal(char *file) 37 * 38 * DESCRIPTION 39 * legal() checks to see if "file" is a writable file name. 40 * 41 * Returns: 42 * 0 -> file or directory exists, but is unwriteable 43 * 1 -> file exists writeable 44 * 2 -> file does not exist, but can be created 45 */ 46 47 #include "mail.h" 48 int 49 legal(file) 50 register char *file; 51 { 52 register char *sp; 53 char dfile[MAXFILENAME]; 54 55 /* 56 * If file does not exist then try "." if file name has 57 * no "/". For file names that have a "/", try check 58 * for existence of previous directory. 59 */ 60 if (access(file, A_EXIST) == A_OK) { 61 if (access(file, A_WRITE) == A_OK) 62 return (1); 63 else return (0); 64 } else { 65 if ((sp = strrchr(file, '/')) == NULL) { 66 strcpy(dfile, "."); 67 } else if (sp == file) { 68 strcpy(dfile, "/"); 69 } else { 70 if ((sp - file + 1) > MAXFILENAME) 71 return (0); 72 strncpy(dfile, file, sp - file); 73 dfile[sp - file] = '\0'; 74 } 75 if (access(dfile, A_WRITE) == CERROR) 76 return (0); 77 return (2); 78 } 79 } 80