xref: /illumos-gate/usr/src/cmd/lp/lib/msgs/_getmessage.c (revision 7c478bd9)
1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate  * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate  *
20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23*7c478bd9Sstevel@tonic-gate /*	  All Rights Reserved  	*/
24*7c478bd9Sstevel@tonic-gate 
25*7c478bd9Sstevel@tonic-gate 
26*7c478bd9Sstevel@tonic-gate #ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.9	*/
27*7c478bd9Sstevel@tonic-gate /* LINTLIBRARY */
28*7c478bd9Sstevel@tonic-gate 
29*7c478bd9Sstevel@tonic-gate # include	<stdarg.h>
30*7c478bd9Sstevel@tonic-gate # include	<string.h>
31*7c478bd9Sstevel@tonic-gate # include	<errno.h>
32*7c478bd9Sstevel@tonic-gate 
33*7c478bd9Sstevel@tonic-gate # include	"msgs.h"
34*7c478bd9Sstevel@tonic-gate 
35*7c478bd9Sstevel@tonic-gate extern char	*_lp_msg_fmts[];
36*7c478bd9Sstevel@tonic-gate extern int	errno;
37*7c478bd9Sstevel@tonic-gate 
38*7c478bd9Sstevel@tonic-gate /* VARARGS */
39*7c478bd9Sstevel@tonic-gate #if	defined(__STDC__)
_getmessage(char * buf,short rtype,va_list arg)40*7c478bd9Sstevel@tonic-gate int _getmessage ( char * buf, short rtype, va_list arg )
41*7c478bd9Sstevel@tonic-gate #else
42*7c478bd9Sstevel@tonic-gate int _getmessage (buf, rtype, arg)
43*7c478bd9Sstevel@tonic-gate     char	*buf;
44*7c478bd9Sstevel@tonic-gate     short	rtype;
45*7c478bd9Sstevel@tonic-gate     va_list	arg;
46*7c478bd9Sstevel@tonic-gate #endif
47*7c478bd9Sstevel@tonic-gate {
48*7c478bd9Sstevel@tonic-gate     char	*endbuf;
49*7c478bd9Sstevel@tonic-gate     char	*fmt;
50*7c478bd9Sstevel@tonic-gate     char	**t_string;
51*7c478bd9Sstevel@tonic-gate     int		temp = 0;
52*7c478bd9Sstevel@tonic-gate     long	*t_long;
53*7c478bd9Sstevel@tonic-gate     short	*t_short;
54*7c478bd9Sstevel@tonic-gate     short	etype;
55*7c478bd9Sstevel@tonic-gate 
56*7c478bd9Sstevel@tonic-gate     if (buf == (char *)0)
57*7c478bd9Sstevel@tonic-gate     {
58*7c478bd9Sstevel@tonic-gate 	errno = ENOSPC;
59*7c478bd9Sstevel@tonic-gate 	return(-1);
60*7c478bd9Sstevel@tonic-gate     }
61*7c478bd9Sstevel@tonic-gate 
62*7c478bd9Sstevel@tonic-gate     /*
63*7c478bd9Sstevel@tonic-gate      * We assume that we're given a buffer big enough to hold
64*7c478bd9Sstevel@tonic-gate      * the header.
65*7c478bd9Sstevel@tonic-gate      */
66*7c478bd9Sstevel@tonic-gate 
67*7c478bd9Sstevel@tonic-gate     endbuf = buf + (long)stoh(buf);
68*7c478bd9Sstevel@tonic-gate     if ((buf + MESG_DATA) > endbuf)
69*7c478bd9Sstevel@tonic-gate     {
70*7c478bd9Sstevel@tonic-gate 	errno = ENOMSG;
71*7c478bd9Sstevel@tonic-gate 	return(-1);
72*7c478bd9Sstevel@tonic-gate     }
73*7c478bd9Sstevel@tonic-gate 
74*7c478bd9Sstevel@tonic-gate     etype = stoh(buf + MESG_TYPE);
75*7c478bd9Sstevel@tonic-gate     if (etype < 0 || etype > LAST_MESSAGE)
76*7c478bd9Sstevel@tonic-gate     {
77*7c478bd9Sstevel@tonic-gate 	errno = EBADMSG;
78*7c478bd9Sstevel@tonic-gate         return(-1);
79*7c478bd9Sstevel@tonic-gate     }
80*7c478bd9Sstevel@tonic-gate 
81*7c478bd9Sstevel@tonic-gate     if (etype != rtype)
82*7c478bd9Sstevel@tonic-gate     {
83*7c478bd9Sstevel@tonic-gate 	if (rtype > 0 && rtype <= LAST_MESSAGE)
84*7c478bd9Sstevel@tonic-gate 	    fmt = _lp_msg_fmts[rtype];
85*7c478bd9Sstevel@tonic-gate 	else
86*7c478bd9Sstevel@tonic-gate 	{
87*7c478bd9Sstevel@tonic-gate 	    errno = EINVAL;
88*7c478bd9Sstevel@tonic-gate 	    return(-1);
89*7c478bd9Sstevel@tonic-gate 	}
90*7c478bd9Sstevel@tonic-gate     }
91*7c478bd9Sstevel@tonic-gate     else
92*7c478bd9Sstevel@tonic-gate 	fmt = _lp_msg_fmts[etype];
93*7c478bd9Sstevel@tonic-gate 
94*7c478bd9Sstevel@tonic-gate     buf += MESG_LEN;
95*7c478bd9Sstevel@tonic-gate 
96*7c478bd9Sstevel@tonic-gate     while (*fmt != '\0')
97*7c478bd9Sstevel@tonic-gate 	switch(*fmt++)
98*7c478bd9Sstevel@tonic-gate 	{
99*7c478bd9Sstevel@tonic-gate 	    case 'H':
100*7c478bd9Sstevel@tonic-gate 	        if ((buf + 4) > endbuf)
101*7c478bd9Sstevel@tonic-gate 		{
102*7c478bd9Sstevel@tonic-gate 		    errno = ENOMSG;
103*7c478bd9Sstevel@tonic-gate 		    return(-1);
104*7c478bd9Sstevel@tonic-gate 		}
105*7c478bd9Sstevel@tonic-gate 
106*7c478bd9Sstevel@tonic-gate 		t_short = va_arg(arg, short *);
107*7c478bd9Sstevel@tonic-gate 		*t_short = stoh(buf);
108*7c478bd9Sstevel@tonic-gate 		buf += 4;
109*7c478bd9Sstevel@tonic-gate 		break;
110*7c478bd9Sstevel@tonic-gate 
111*7c478bd9Sstevel@tonic-gate 	    case 'L':
112*7c478bd9Sstevel@tonic-gate 		if ((buf + 8) > endbuf)
113*7c478bd9Sstevel@tonic-gate 		{
114*7c478bd9Sstevel@tonic-gate 		    errno = ENOMSG;
115*7c478bd9Sstevel@tonic-gate 		    return(-1);
116*7c478bd9Sstevel@tonic-gate 		}
117*7c478bd9Sstevel@tonic-gate 
118*7c478bd9Sstevel@tonic-gate 		t_long = va_arg(arg, long *);
119*7c478bd9Sstevel@tonic-gate 		*t_long = stol(buf);
120*7c478bd9Sstevel@tonic-gate 		buf += 8;
121*7c478bd9Sstevel@tonic-gate 		break;
122*7c478bd9Sstevel@tonic-gate 
123*7c478bd9Sstevel@tonic-gate 	    case 'D':
124*7c478bd9Sstevel@tonic-gate 		if ((buf + 4) > endbuf)
125*7c478bd9Sstevel@tonic-gate 		{
126*7c478bd9Sstevel@tonic-gate 		    errno = ENOMSG;
127*7c478bd9Sstevel@tonic-gate 		    return(-1);
128*7c478bd9Sstevel@tonic-gate 		}
129*7c478bd9Sstevel@tonic-gate 
130*7c478bd9Sstevel@tonic-gate 		t_short = va_arg(arg, short *);
131*7c478bd9Sstevel@tonic-gate 		*t_short = stoh(buf);
132*7c478bd9Sstevel@tonic-gate 		buf += 4;
133*7c478bd9Sstevel@tonic-gate 		t_string = va_arg(arg, char **);
134*7c478bd9Sstevel@tonic-gate 		if ((buf + *t_short) > endbuf)
135*7c478bd9Sstevel@tonic-gate 		{
136*7c478bd9Sstevel@tonic-gate 		    errno = ENOMSG;
137*7c478bd9Sstevel@tonic-gate 		    return(-1);
138*7c478bd9Sstevel@tonic-gate 		}
139*7c478bd9Sstevel@tonic-gate 		(*t_short)--;		/* Don't mention the null we added */
140*7c478bd9Sstevel@tonic-gate 		*t_string = buf;
141*7c478bd9Sstevel@tonic-gate 		buf += *t_short;
142*7c478bd9Sstevel@tonic-gate 		break;
143*7c478bd9Sstevel@tonic-gate 
144*7c478bd9Sstevel@tonic-gate 	    case 'S':
145*7c478bd9Sstevel@tonic-gate 		if ((buf + 4) > endbuf)
146*7c478bd9Sstevel@tonic-gate 		{
147*7c478bd9Sstevel@tonic-gate 		    errno = ENOMSG;
148*7c478bd9Sstevel@tonic-gate 		    return(-1);
149*7c478bd9Sstevel@tonic-gate 		}
150*7c478bd9Sstevel@tonic-gate 
151*7c478bd9Sstevel@tonic-gate 		t_string = va_arg(arg, char **);
152*7c478bd9Sstevel@tonic-gate 		temp = stoh(buf);
153*7c478bd9Sstevel@tonic-gate 		buf += 4;
154*7c478bd9Sstevel@tonic-gate 		if ((buf + temp) > endbuf)
155*7c478bd9Sstevel@tonic-gate 		{
156*7c478bd9Sstevel@tonic-gate 		    errno = ENOMSG;
157*7c478bd9Sstevel@tonic-gate 		    return(-1);
158*7c478bd9Sstevel@tonic-gate 		}
159*7c478bd9Sstevel@tonic-gate 
160*7c478bd9Sstevel@tonic-gate 		*t_string = buf;
161*7c478bd9Sstevel@tonic-gate 		buf += temp;
162*7c478bd9Sstevel@tonic-gate 		break;
163*7c478bd9Sstevel@tonic-gate 	}
164*7c478bd9Sstevel@tonic-gate     return(etype);
165*7c478bd9Sstevel@tonic-gate }
166