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 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 #include "uucp.h" 31 32 #define MSYNC '\020' 33 /* maximum likely message - make sure you don't get run away input */ 34 #define MAXIMSG 256 35 36 /* 37 * read message routine used before a 38 * protocol is agreed upon. 39 * msg -> address of input buffer 40 * fn -> input file descriptor 41 * returns: 42 * EOF -> no more messages 43 * 0 -> message returned 44 */ 45 int 46 imsg(msg, fn) 47 char *msg; 48 int fn; 49 { 50 char c; 51 int i; 52 short fndsync; 53 char *bmsg; 54 55 fndsync = 0; 56 bmsg = msg; 57 CDEBUG(7, "imsg %s>", ""); 58 while ((i = (*Read)(fn, msg, sizeof(char))) == sizeof(char)) { 59 *msg &= 0177; 60 c = *msg; 61 CDEBUG(7, "%s", c < 040 ? "^" : ""); 62 CDEBUG(7, "%c", c < 040 ? c | 0100 : c); 63 if (c == MSYNC) { /* look for sync character */ 64 msg = bmsg; 65 fndsync = 1; 66 continue; 67 } 68 if (!fndsync) 69 continue; 70 71 if (c == '\0' || c == '\n') { 72 *msg = '\0'; 73 return(0); 74 } 75 else 76 msg++; 77 78 if (msg - bmsg > MAXIMSG) /* unlikely */ 79 return(FAIL); 80 } 81 /* have not found sync or end of message */ 82 if (i < 0) { 83 CDEBUG(7, "\nimsg read error: %s\n", strerror(errno)); 84 } 85 *msg = '\0'; 86 return(EOF); 87 } 88 89 /* 90 * initial write message routine - 91 * used before a protocol is agreed upon. 92 * type -> message type 93 * msg -> message body address 94 * fn -> file descriptor 95 * return: 96 * Must always return 0 - wmesg (WMESG) looks for zero 97 */ 98 int 99 omsg(type, msg, fn) 100 char *msg; 101 char type; 102 int fn; 103 { 104 char buf[BUFSIZ]; 105 106 (void) sprintf(buf, "%c%c%s", MSYNC, type, msg); 107 DEBUG( 7, "omsg \"%s\"\n", &buf[1] ); 108 (*Write)(fn, buf, strlen(buf) + 1); 109 return(0); 110 } 111 112 /* 113 * null turnoff routine to be used for errors 114 * during protocol selection. 115 */ 116 int 117 turnoff(void) 118 { 119 return(0); 120 } 121