1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 1997 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28*0Sstevel@tonic-gate /* All Rights Reserved */
29*0Sstevel@tonic-gate
30*0Sstevel@tonic-gate
31*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.3 */
32*0Sstevel@tonic-gate /* LINTLIBRARY */
33*0Sstevel@tonic-gate
34*0Sstevel@tonic-gate
35*0Sstevel@tonic-gate #include <errno.h>
36*0Sstevel@tonic-gate #include <fcntl.h>
37*0Sstevel@tonic-gate #include <stdio.h>
38*0Sstevel@tonic-gate #include "lp.h"
39*0Sstevel@tonic-gate #include "msgs.h"
40*0Sstevel@tonic-gate
41*0Sstevel@tonic-gate static fifobuffer_t **FifoBufferTable = NULL;
42*0Sstevel@tonic-gate static int FifoBufferTableSize = 0;
43*0Sstevel@tonic-gate
44*0Sstevel@tonic-gate /*
45*0Sstevel@tonic-gate ** Local functions
46*0Sstevel@tonic-gate */
47*0Sstevel@tonic-gate static int InitFifoBufferTable (void);
48*0Sstevel@tonic-gate static int GrowFifoBufferTable (int);
49*0Sstevel@tonic-gate static fifobuffer_t *NewFifoBuffer (int);
50*0Sstevel@tonic-gate
51*0Sstevel@tonic-gate
52*0Sstevel@tonic-gate int
ResetFifoBuffer(int fd)53*0Sstevel@tonic-gate ResetFifoBuffer(int fd)
54*0Sstevel@tonic-gate {
55*0Sstevel@tonic-gate if ((!FifoBufferTableSize) && (InitFifoBufferTable () < 0))
56*0Sstevel@tonic-gate return -1;
57*0Sstevel@tonic-gate
58*0Sstevel@tonic-gate if (fd >= FifoBufferTableSize)
59*0Sstevel@tonic-gate return 0;
60*0Sstevel@tonic-gate
61*0Sstevel@tonic-gate if (FifoBufferTable [fd]) {
62*0Sstevel@tonic-gate FifoBufferTable [fd]->full = 0;
63*0Sstevel@tonic-gate FifoBufferTable [fd]->psave =
64*0Sstevel@tonic-gate FifoBufferTable [fd]->psave_end =
65*0Sstevel@tonic-gate FifoBufferTable [fd]->save;
66*0Sstevel@tonic-gate }
67*0Sstevel@tonic-gate return 0;
68*0Sstevel@tonic-gate }
69*0Sstevel@tonic-gate
70*0Sstevel@tonic-gate
71*0Sstevel@tonic-gate fifobuffer_t *
GetFifoBuffer(int fd)72*0Sstevel@tonic-gate GetFifoBuffer(int fd)
73*0Sstevel@tonic-gate {
74*0Sstevel@tonic-gate if (fd < 0) {
75*0Sstevel@tonic-gate errno = EINVAL;
76*0Sstevel@tonic-gate return NULL;
77*0Sstevel@tonic-gate }
78*0Sstevel@tonic-gate if ((fd >= FifoBufferTableSize) && (GrowFifoBufferTable (fd) < 0))
79*0Sstevel@tonic-gate return NULL;
80*0Sstevel@tonic-gate
81*0Sstevel@tonic-gate if (!FifoBufferTable [fd]) {
82*0Sstevel@tonic-gate if (!NewFifoBuffer (fd))
83*0Sstevel@tonic-gate return NULL;
84*0Sstevel@tonic-gate
85*0Sstevel@tonic-gate FifoBufferTable [fd]->full = 0;
86*0Sstevel@tonic-gate FifoBufferTable [fd]->psave =
87*0Sstevel@tonic-gate FifoBufferTable [fd]->psave_end =
88*0Sstevel@tonic-gate FifoBufferTable [fd]->save;
89*0Sstevel@tonic-gate }
90*0Sstevel@tonic-gate
91*0Sstevel@tonic-gate return FifoBufferTable [fd];
92*0Sstevel@tonic-gate }
93*0Sstevel@tonic-gate
94*0Sstevel@tonic-gate
95*0Sstevel@tonic-gate static int
InitFifoBufferTable()96*0Sstevel@tonic-gate InitFifoBufferTable()
97*0Sstevel@tonic-gate {
98*0Sstevel@tonic-gate if (FifoBufferTableSize)
99*0Sstevel@tonic-gate return 0;
100*0Sstevel@tonic-gate
101*0Sstevel@tonic-gate FifoBufferTable = (fifobuffer_t **)
102*0Sstevel@tonic-gate Calloc (100, sizeof (fifobuffer_t *));
103*0Sstevel@tonic-gate if (!FifoBufferTable)
104*0Sstevel@tonic-gate return -1; /* ENOMEM is already set. */
105*0Sstevel@tonic-gate
106*0Sstevel@tonic-gate FifoBufferTableSize = 100;
107*0Sstevel@tonic-gate
108*0Sstevel@tonic-gate return 0;
109*0Sstevel@tonic-gate }
110*0Sstevel@tonic-gate
111*0Sstevel@tonic-gate
112*0Sstevel@tonic-gate static int
GrowFifoBufferTable(int fd)113*0Sstevel@tonic-gate GrowFifoBufferTable (int fd)
114*0Sstevel@tonic-gate {
115*0Sstevel@tonic-gate fifobuffer_t **newpp;
116*0Sstevel@tonic-gate
117*0Sstevel@tonic-gate newpp = (fifobuffer_t **)
118*0Sstevel@tonic-gate Realloc ((void*)FifoBufferTable,
119*0Sstevel@tonic-gate (fd+10)*sizeof (fifobuffer_t *));
120*0Sstevel@tonic-gate if (!newpp)
121*0Sstevel@tonic-gate return -1; /* ENOMEM is already set. */
122*0Sstevel@tonic-gate
123*0Sstevel@tonic-gate FifoBufferTableSize = fd+10;
124*0Sstevel@tonic-gate
125*0Sstevel@tonic-gate return 0;
126*0Sstevel@tonic-gate }
127*0Sstevel@tonic-gate
128*0Sstevel@tonic-gate
129*0Sstevel@tonic-gate static fifobuffer_t *
NewFifoBuffer(int fd)130*0Sstevel@tonic-gate NewFifoBuffer(int fd)
131*0Sstevel@tonic-gate {
132*0Sstevel@tonic-gate int i;
133*0Sstevel@tonic-gate
134*0Sstevel@tonic-gate for (i=0; i < FifoBufferTableSize; i++)
135*0Sstevel@tonic-gate {
136*0Sstevel@tonic-gate if (FifoBufferTable [i] &&
137*0Sstevel@tonic-gate Fcntl (i, F_GETFL) < 0 &&
138*0Sstevel@tonic-gate errno == EBADF)
139*0Sstevel@tonic-gate {
140*0Sstevel@tonic-gate FifoBufferTable [fd] = FifoBufferTable [i];
141*0Sstevel@tonic-gate FifoBufferTable [i] = NULL;
142*0Sstevel@tonic-gate return FifoBufferTable [fd];
143*0Sstevel@tonic-gate }
144*0Sstevel@tonic-gate }
145*0Sstevel@tonic-gate FifoBufferTable [fd] = (fifobuffer_t *)
146*0Sstevel@tonic-gate Calloc (1, sizeof (fifobuffer_t));
147*0Sstevel@tonic-gate
148*0Sstevel@tonic-gate return FifoBufferTable [fd];
149*0Sstevel@tonic-gate }
150