17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate * with the License.
87c478bd9Sstevel@tonic-gate *
97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate * and limitations under the License.
137c478bd9Sstevel@tonic-gate *
147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate *
207c478bd9Sstevel@tonic-gate * CDDL HEADER END
217c478bd9Sstevel@tonic-gate */
227c478bd9Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
237c478bd9Sstevel@tonic-gate /* All Rights Reserved */
247c478bd9Sstevel@tonic-gate
257c478bd9Sstevel@tonic-gate
267c478bd9Sstevel@tonic-gate #ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.6 */
277c478bd9Sstevel@tonic-gate /* LINTLIBRARY */
287c478bd9Sstevel@tonic-gate
297c478bd9Sstevel@tonic-gate
307c478bd9Sstevel@tonic-gate #include <errno.h>
317c478bd9Sstevel@tonic-gate #include <fcntl.h>
327c478bd9Sstevel@tonic-gate #include <string.h>
337c478bd9Sstevel@tonic-gate #include <stropts.h>
347c478bd9Sstevel@tonic-gate
357c478bd9Sstevel@tonic-gate #include "lp.h"
367c478bd9Sstevel@tonic-gate #include "msgs.h"
377c478bd9Sstevel@tonic-gate
387c478bd9Sstevel@tonic-gate extern int Lp_prio_msg;
397c478bd9Sstevel@tonic-gate
407c478bd9Sstevel@tonic-gate /*
417c478bd9Sstevel@tonic-gate ** Function: int mread( MESG *, char *, int)
427c478bd9Sstevel@tonic-gate ** Args: message descriptor
437c478bd9Sstevel@tonic-gate ** message buffer (var)
447c478bd9Sstevel@tonic-gate ** buffer size
457c478bd9Sstevel@tonic-gate ** Return: The size of the message in message buffer.
467c478bd9Sstevel@tonic-gate ** or -1 on error. Possible errnos are:
477c478bd9Sstevel@tonic-gate ** EINVAL Bad value for md or msgbuf.
487c478bd9Sstevel@tonic-gate ** E2BIG Not enough space for message.
497c478bd9Sstevel@tonic-gate ** EPIPE Far end dropped the connection.
507c478bd9Sstevel@tonic-gate ** ENOMSG No valid message available on fifo.
517c478bd9Sstevel@tonic-gate **
527c478bd9Sstevel@tonic-gate ** mread examines message descriptor and either calls read3_2
537c478bd9Sstevel@tonic-gate ** to read 3.2 HPI messages or getmsg(2) to read 4.0 HPI messages.
547c478bd9Sstevel@tonic-gate ** If a message is read, it is returned in message buffer.
557c478bd9Sstevel@tonic-gate */
567c478bd9Sstevel@tonic-gate
577c478bd9Sstevel@tonic-gate #if defined(__STDC__)
mread(MESG * md,char * msgbuf,int size)587c478bd9Sstevel@tonic-gate int mread ( MESG * md, char * msgbuf, int size )
597c478bd9Sstevel@tonic-gate #else
607c478bd9Sstevel@tonic-gate int mread ( md, msgbuf, size )
617c478bd9Sstevel@tonic-gate MESG *md;
627c478bd9Sstevel@tonic-gate char *msgbuf;
637c478bd9Sstevel@tonic-gate int size;
647c478bd9Sstevel@tonic-gate #endif
657c478bd9Sstevel@tonic-gate {
667c478bd9Sstevel@tonic-gate int flag = 0;
677c478bd9Sstevel@tonic-gate char buff [MSGMAX];
687c478bd9Sstevel@tonic-gate struct strbuf dat;
697c478bd9Sstevel@tonic-gate struct strbuf ctl;
707c478bd9Sstevel@tonic-gate
717c478bd9Sstevel@tonic-gate if (md == NULL || msgbuf == NULL)
727c478bd9Sstevel@tonic-gate {
737c478bd9Sstevel@tonic-gate errno = EINVAL;
747c478bd9Sstevel@tonic-gate return(-1);
757c478bd9Sstevel@tonic-gate }
767c478bd9Sstevel@tonic-gate
777c478bd9Sstevel@tonic-gate switch(md->type)
787c478bd9Sstevel@tonic-gate {
797c478bd9Sstevel@tonic-gate case MD_CHILD:
807c478bd9Sstevel@tonic-gate case MD_STREAM:
817c478bd9Sstevel@tonic-gate case MD_BOUND:
827c478bd9Sstevel@tonic-gate if (size <= 0)
837c478bd9Sstevel@tonic-gate {
847c478bd9Sstevel@tonic-gate errno = E2BIG;
857c478bd9Sstevel@tonic-gate return(-1);
867c478bd9Sstevel@tonic-gate }
877c478bd9Sstevel@tonic-gate dat.buf = msgbuf;
887c478bd9Sstevel@tonic-gate dat.maxlen = size;
897c478bd9Sstevel@tonic-gate dat.len = 0;
907c478bd9Sstevel@tonic-gate ctl.buf = buff;
917c478bd9Sstevel@tonic-gate ctl.maxlen = sizeof (buff);
927c478bd9Sstevel@tonic-gate ctl.len = 0;
937c478bd9Sstevel@tonic-gate flag = Lp_prio_msg;
947c478bd9Sstevel@tonic-gate Lp_prio_msg = 0; /* clean this up so there are no surprises */
95*55fea89dSDan Cross
967c478bd9Sstevel@tonic-gate if (Getmsg(md, &ctl, &dat, &flag) < 0)
977c478bd9Sstevel@tonic-gate {
987c478bd9Sstevel@tonic-gate if (errno == EBADF)
997c478bd9Sstevel@tonic-gate errno = EPIPE;
1007c478bd9Sstevel@tonic-gate return(-1);
1017c478bd9Sstevel@tonic-gate }
1027c478bd9Sstevel@tonic-gate
1037c478bd9Sstevel@tonic-gate if (dat.len == 0)
1047c478bd9Sstevel@tonic-gate {
1057c478bd9Sstevel@tonic-gate (void) Close(md->readfd);
1067c478bd9Sstevel@tonic-gate return(0);
1077c478bd9Sstevel@tonic-gate }
1087c478bd9Sstevel@tonic-gate break;
1097c478bd9Sstevel@tonic-gate
1107c478bd9Sstevel@tonic-gate case MD_USR_FIFO:
1117c478bd9Sstevel@tonic-gate case MD_SYS_FIFO:
1127c478bd9Sstevel@tonic-gate if (size < CONTROL_LEN)
1137c478bd9Sstevel@tonic-gate {
1147c478bd9Sstevel@tonic-gate errno = E2BIG;
1157c478bd9Sstevel@tonic-gate return(-1);
1167c478bd9Sstevel@tonic-gate }
1177c478bd9Sstevel@tonic-gate
1187c478bd9Sstevel@tonic-gate if (read3_2(md, msgbuf, size) < 0)
1197c478bd9Sstevel@tonic-gate return(-1);
1207c478bd9Sstevel@tonic-gate break;
1217c478bd9Sstevel@tonic-gate }
1227c478bd9Sstevel@tonic-gate
1237c478bd9Sstevel@tonic-gate return((int)msize(msgbuf));
1247c478bd9Sstevel@tonic-gate }
125