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 1994 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" /* SVr4.0 1.6 */ 32 33 # include <unistd.h> 34 # include <errno.h> 35 # include <stdlib.h> 36 37 #if defined(__STDC__) 38 # include <stdarg.h> 39 #else 40 # include <varargs.h> 41 #endif 42 43 # include "lp.h" 44 # include "msgs.h" 45 46 47 /* 48 ** Size and pointer for mgetm() 49 */ 50 static int MBGSize = 0; 51 static char * MBG = NULL; 52 53 /* 54 ** Size and pointer for mputm() 55 */ 56 static int MBPSize = 0; 57 static char * MBP = NULL; 58 59 int peek3_2(); 60 61 #if defined(__STDC__) 62 int mgetm ( MESG * md, int type, ... ) 63 #else 64 int mgetm (md, type, va_alist) 65 MESG *md; 66 int type; 67 va_dcl 68 #endif 69 { 70 va_list vp; 71 int ret; 72 int needsize; 73 74 #if defined(__STDC__) 75 va_start(vp, type); 76 #else 77 va_start(vp); 78 #endif 79 80 needsize = mpeek(md); 81 if (needsize <=0 || needsize > MSGMAX) 82 needsize = MSGMAX; 83 if (needsize > MBGSize) 84 { 85 if (MBG) 86 Free(MBG); 87 if ((MBG = (char *)Malloc(needsize)) == NULL) 88 { 89 MBGSize = 0; 90 MBG = NULL; 91 errno = ENOMEM; 92 return(-1); 93 } 94 MBGSize = needsize; 95 } 96 if (mread(md, MBG, MBGSize) < 0) 97 return(-1); 98 99 ret = _getmessage(MBG, type, vp); 100 101 va_end(vp); 102 103 return(ret); 104 } 105 106 #if defined(__STDC__) 107 int mputm ( MESG * md, int type, ... ) 108 #else 109 int mputm (md, type, va_alist) 110 MESG *md; 111 int type; 112 va_dcl 113 #endif 114 { 115 va_list vp; 116 int needsize; 117 118 #if defined(__STDC__) 119 va_start(vp, type); 120 #else 121 va_start(vp); 122 #endif 123 needsize = _putmessage(NULL, type, vp); 124 va_end(vp); 125 if (needsize <= 0) 126 return(-1); 127 128 if (needsize > MBPSize) 129 { 130 if (MBP) 131 Free(MBP); 132 if ((MBP = (char *)Malloc(needsize)) == NULL) 133 { 134 MBPSize = 0; 135 MBP = NULL; 136 errno = ENOMEM; 137 return(-1); 138 } 139 MBPSize = needsize; 140 } 141 142 #if defined(__STDC__) 143 va_start(vp, type); 144 #else 145 va_start(vp); 146 #endif 147 needsize = _putmessage(MBP, type, vp); 148 va_end(vp); 149 if (needsize <= 0) 150 return(-1); 151 152 153 return(mwrite(md, MBP)); 154 } 155 156 #if defined(__STDC__) 157 void __mbfree ( void ) 158 #else 159 void __mbfree () 160 #endif 161 { 162 MBGSize = MBPSize = 0; 163 if (MBG) 164 Free (MBG); 165 if (MBP) 166 Free (MBP); 167 MBG = MBP = NULL; 168 } 169 170 #if defined(__STDC__) 171 short mpeek ( MESG * md ) 172 #else 173 short mpeek (md) 174 MESG *md; 175 #endif 176 { 177 int size; 178 179 if (md->type == MD_USR_FIFO || md->type == MD_SYS_FIFO) 180 return(peek3_2(md->readfd) - EXCESS_3_2_LEN); 181 182 if (ioctl(md->readfd, I_NREAD, &size)) 183 return((short)size); 184 185 return(-1); 186 } 187