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 1988 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 31 #pragma ident "%Z%%M% %I% %E% SMI" 32 33 #include "uucp.h" 34 35 #define MSYNC '\020' 36 /* maximum likely message - make sure you don't get run away input */ 37 #define MAXIMSG 256 38 39 /* 40 * read message routine used before a 41 * protocol is agreed upon. 42 * msg -> address of input buffer 43 * fn -> input file descriptor 44 * returns: 45 * EOF -> no more messages 46 * 0 -> message returned 47 */ 48 int 49 imsg(msg, fn) 50 register char *msg; 51 register int fn; 52 { 53 register char c; 54 register int i; 55 short fndsync; 56 char *bmsg; 57 extern int errno, sys_nerr; 58 extern char *sys_errlist[]; 59 60 fndsync = 0; 61 bmsg = msg; 62 CDEBUG(7, "imsg %s>", ""); 63 while ((i = (*Read)(fn, msg, sizeof(char))) == sizeof(char)) { 64 *msg &= 0177; 65 c = *msg; 66 CDEBUG(7, "%s", c < 040 ? "^" : ""); 67 CDEBUG(7, "%c", c < 040 ? c | 0100 : c); 68 if (c == MSYNC) { /* look for sync character */ 69 msg = bmsg; 70 fndsync = 1; 71 continue; 72 } 73 if (!fndsync) 74 continue; 75 76 if (c == '\0' || c == '\n') { 77 *msg = '\0'; 78 return(0); 79 } 80 else 81 msg++; 82 83 if (msg - bmsg > MAXIMSG) /* unlikely */ 84 return(FAIL); 85 } 86 /* have not found sync or end of message */ 87 if (i < 0) { 88 if (errno < sys_nerr) 89 CDEBUG(7, "\nimsg read error: %s\n", 90 sys_errlist[errno]); 91 else 92 CDEBUG(7, "\nimsg read error, errno %d\n", errno); 93 } 94 *msg = '\0'; 95 return(EOF); 96 } 97 98 /* 99 * initial write message routine - 100 * used before a protocol is agreed upon. 101 * type -> message type 102 * msg -> message body address 103 * fn -> file descriptor 104 * return: 105 * Must always return 0 - wmesg (WMESG) looks for zero 106 */ 107 int 108 omsg(type, msg, fn) 109 register char *msg; 110 register char type; 111 int fn; 112 { 113 char buf[BUFSIZ]; 114 115 (void) sprintf(buf, "%c%c%s", MSYNC, type, msg); 116 DEBUG( 7, "omsg \"%s\"\n", &buf[1] ); 117 (*Write)(fn, buf, strlen(buf) + 1); 118 return(0); 119 } 120 121 /* 122 * null turnoff routine to be used for errors 123 * during protocol selection. 124 */ 125 turnoff() 126 { 127 return(0); 128 } 129