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1.1 root 1: /*
2: * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
1.1.1.2 ! root 33: * from: @(#)dev.c 7.14 (Berkeley) 5/5/91
! 34: * dev.c,v 1.2 1993/05/20 03:53:59 cgd Exp
1.1 root 35: */
36:
37: #include <sys/param.h>
38: #include <setjmp.h>
39: #include "saio.h"
40:
41: /*
42: * NB: the value "io->i_dev", used to offset the devsw[] array in the
43: * routines below, is munged by the machine specific stand Makefiles
44: * to work for certain boots.
45: */
46:
47: jmp_buf exception;
48:
49: devread(io)
50: register struct iob *io;
51: {
52: int cc;
53:
54: io->i_flgs |= F_RDDATA;
55: io->i_error = 0;
56: cc = (*devsw[io->i_dev].dv_strategy)(io, F_READ);
57: io->i_flgs &= ~F_TYPEMASK;
58: #ifndef SMALL
59: if (scankbd())
60: _longjmp(exception, 1);
61: #endif
62: return (cc);
63: }
64:
65: devwrite(io)
66: register struct iob *io;
67: {
68: int cc;
69:
70: io->i_flgs |= F_WRDATA;
71: io->i_error = 0;
72: cc = (*devsw[io->i_dev].dv_strategy)(io, F_WRITE);
73: io->i_flgs &= ~F_TYPEMASK;
74: #ifndef SMALL
75: if (scankbd())
76: _longjmp(exception, 1);
77: #endif
78: return (cc);
79: }
80:
81: devopen(io)
82: register struct iob *io;
83: {
84: int ret;
85:
86: if (!(ret = (*devsw[io->i_dev].dv_open)(io)))
87: return (0);
88: #ifdef SMALL
89: printf("open error\n");
90: #else
91: printf("%s(%d,%d,%d,%d): ", devsw[io->i_dev].dv_name,
92: io->i_adapt, io->i_ctlr, io->i_unit, io->i_part);
93: switch(ret) {
94: case EIO:
95: break; /* already reported */
96: case EADAPT:
97: printf("bad adaptor number\n");
98: break;
99: case ECTLR:
100: printf("bad controller number\n");
101: break;
102: case EUNIT:
103: printf("bad drive number\n");
104: break;
105: case EPART:
106: printf("bad partition\n");
107: break;
108: case ERDLAB:
109: printf("can't read disk label\n");
110: break;
111: case EUNLAB:
112: printf("unlabeled\n");
113: break;
114: case ENXIO:
115: printf("bad device specification\n");
116: break;
117: default:
118: printf("unknown open error\n");
119: break;
120: }
121: #endif
122: return (ret);
123: }
124:
125: devclose(io)
126: register struct iob *io;
127: {
128: (*devsw[io->i_dev].dv_close)(io);
129: }
130:
131: devioctl(io, cmd, arg)
132: register struct iob *io;
133: int cmd;
134: caddr_t arg;
135: {
136: return ((*devsw[io->i_dev].dv_ioctl)(io, cmd, arg));
137: }
138:
139: /* ARGSUSED */
140: nullsys(io)
141: struct iob *io;
142: {}
143:
144: /* ARGSUSED */
145: nodev(io)
146: struct iob *io;
147: {
148: errno = EBADF;
149: return(-1);
150: }
151:
152: /* ARGSUSED */
153: noioctl(io, cmd, arg)
154: struct iob *io;
155: int cmd;
156: caddr_t arg;
157: {
158: return (ECMD);
159: }
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