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 1997 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
32 #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.2 */
33
34 #include <unistd.h>
35 #include <signal.h>
36 #include <stropts.h>
37 #include <errno.h>
38 #include "lp.h"
39 #include "msgs.h"
40
41 extern int errno;
42
43 /*
44 * Putmsg() function
45 * Return 0: success,
46 * non-zero: return code of the failed putmsg() system call.
47 * plus errno for caller to check.
48 * NOTE: cannot do TRACE* calls if errno is expected to be returned!
49 * TRACE* uses fprintf and destroys the content of errno.
50 * Save errno before the TRACE* calls.
51 */
52
53 int
Putmsg(MESG * mdp,strbuf_t * ctlp,strbuf_t * datap,int flags)54 Putmsg (MESG *mdp, strbuf_t *ctlp, strbuf_t *datap, int flags)
55 {
56 int i;
57 int rtncode;
58 int count;
59 struct pollfd fds;
60
61 fds.fd = mdp->writefd;
62 fds.events = POLLOUT;
63 fds.revents = 0;
64
65 (void) poll(&fds, 1, 1000);
66 if (fds.revents & (POLLHUP | POLLERR | POLLNVAL)) {
67 errno = EBADF;
68 return (-1);
69 }
70
71 if (!(fds.revents & POLLOUT)) {
72 errno = EAGAIN;
73 return (-1);
74 }
75
76 rtncode = putmsg (mdp->writefd, ctlp, datap, flags);
77 return (rtncode);
78 }
79
80 int
Getmsg(MESG * mdp,strbuf_t * ctlp,strbuf_t * datap,int * flagsp)81 Getmsg (MESG *mdp, strbuf_t *ctlp, strbuf_t *datap, int *flagsp)
82 {
83 int rtncode;
84
85 rtncode = getmsg (mdp->readfd, ctlp, datap, flagsp);
86 return (rtncode);
87 }
88
89 char AuthCode[HEAD_AUTHCODE_LEN];
90 static void (*callers_sigpipe_trap)() = SIG_DFL;
91
92
93 /*
94 ** Function: static int read3_2( MESG *, char *, int)
95 ** Args: message descriptor
96 ** message buffer (var)
97 ** buffer size
98 ** Return: 0 for sucess, -1 for failure
99 **
100 ** This performs a 3.2 HPI style read_fifo on the pipe referanced
101 ** in the message descriptor. If a message is found, it is returned
102 ** in message buffer.
103 */
read3_2(MESG * md,char * msgbuf,int size)104 int read3_2 ( MESG * md, char *msgbuf, int size )
105 {
106 short type;
107
108 if (md->type == MD_USR_FIFO)
109 (void) Close (Open(md->file, O_RDONLY, 0));
110
111 do
112 {
113 switch (read_fifo(md->readfd, msgbuf, size))
114 {
115 case -1:
116 return (-1);
117
118 case 0:
119 /*
120 ** The fifo was empty and we have O_NDELAY set,
121 ** or the Spooler closed our FIFO.
122 ** We don't set O_NDELAY in the user process,
123 ** so that should never happen. But be warned
124 ** that we can't tell the difference in some versions
125 ** of the UNIX op. sys.!!
126 **
127 */
128 errno = EPIPE;
129 return (-1);
130 }
131
132 if ((type = stoh(msgbuf + HEAD_TYPE)) < 0 || LAST_MESSAGE < type)
133 {
134 errno = ENOMSG;
135 return (-1);
136 }
137 }
138 while (type == I_QUEUE_CHK);
139
140 (void)memcpy (AuthCode, msgbuf + HEAD_AUTHCODE, HEAD_AUTHCODE_LEN);
141
142 /*
143 ** Get the size from the 3.2 HPI message
144 ** minus the size of the control data
145 ** Copy the actual message
146 ** Reset the message size.
147 */
148 size = stoh(msgbuf + HEAD_SIZE) - EXCESS_3_2_LEN;
149 memmove(msgbuf, msgbuf + HEAD_SIZE, size);
150 (void) htos(msgbuf + MESG_SIZE, size);
151 return(0);
152 }
153
write3_2(MESG * md,char * msgbuf,int size)154 int write3_2 ( MESG * md, char * msgbuf, int size )
155 {
156 char tmpbuf [MSGMAX + EXCESS_3_2_LEN];
157 int rval;
158
159
160 (void) memmove(tmpbuf + HEAD_SIZE, msgbuf, size);
161 (void) htos(tmpbuf + HEAD_SIZE, size + EXCESS_3_2_LEN);
162 (void) memcpy (tmpbuf + HEAD_AUTHCODE, AuthCode, HEAD_AUTHCODE_LEN);
163
164 callers_sigpipe_trap = signal(SIGPIPE, SIG_IGN);
165
166 rval = write_fifo(md->writefd, tmpbuf, size + EXCESS_3_2_LEN);
167
168 (void) signal(SIGPIPE, callers_sigpipe_trap);
169
170
171 return (rval);
172 }
173