1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/*-
* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <stand.h>
#include <string.h>
#include <sys/disklabel.h>
#include "bootstrap.h"
#include "libski.h"
static int ski_parsedev(struct ski_devdesc **dev, const char *devspec, const char **path);
/*
* Point (dev) at an allocated device specifier for the device matching the
* path in (devspec). If it contains an explicit device specification,
* use that. If not, use the default device.
*/
int
ski_getdev(void **vdev, const char *devspec, const char **path)
{
struct ski_devdesc **dev = (struct ski_devdesc **)vdev;
int rv;
/*
* If it looks like this is just a path and no
* device, go with the current device.
*/
if ((devspec == NULL) ||
(devspec[0] == '/') ||
(strchr(devspec, ':') == NULL)) {
if (((rv = ski_parsedev(dev, getenv("currdev"), NULL)) == 0) &&
(path != NULL))
*path = devspec;
return(rv);
}
/*
* Try to parse the device name off the beginning of the devspec
*/
return(ski_parsedev(dev, devspec, path));
}
/*
* Point (dev) at an allocated device specifier matching the string version
* at the beginning of (devspec). Return a pointer to the remaining
* text in (path).
*
* In all cases, the beginning of (devspec) is compared to the names
* of known devices in the device switch, and then any following text
* is parsed according to the rules applied to the device type.
*
* For disk-type devices, the syntax is:
*
* disk<unit>[s<slice>][<partition>]:
*
*/
static int
ski_parsedev(struct ski_devdesc **dev, const char *devspec, const char **path)
{
struct ski_devdesc *idev;
struct devsw *dv;
int i, unit, slice, partition, err;
char *cp;
const char *np;
/* minimum length check */
if (strlen(devspec) < 2)
return(EINVAL);
/* look for a device that matches */
for (i = 0, dv = NULL; devsw[i] != NULL; i++) {
if (!strncmp(devspec, devsw[i]->dv_name, strlen(devsw[i]->dv_name))) {
dv = devsw[i];
break;
}
}
if (dv == NULL)
return(ENOENT);
idev = malloc(sizeof(struct ski_devdesc));
err = 0;
np = (devspec + strlen(dv->dv_name));
switch(dv->dv_type) {
case DEVT_NONE: /* XXX what to do here? Do we care? */
break;
case DEVT_DISK:
unit = -1;
slice = -1;
partition = -1;
if (*np && (*np != ':')) {
unit = strtol(np, &cp, 10); /* next comes the unit number */
if (cp == np) {
err = EUNIT;
goto fail;
}
if (*cp == 's') { /* got a slice number */
np = cp + 1;
slice = strtol(np, &cp, 10);
if (cp == np) {
err = ESLICE;
goto fail;
}
}
if (*cp && (*cp != ':')) {
partition = *cp - 'a'; /* get a partition number */
if ((partition < 0) || (partition >= MAXPARTITIONS)) {
err = EPART;
goto fail;
}
cp++;
}
}
if (*cp && (*cp != ':')) {
err = EINVAL;
goto fail;
}
idev->d_kind.skidisk.unit = unit;
idev->d_kind.skidisk.slice = slice;
idev->d_kind.skidisk.partition = partition;
if (path != NULL)
*path = (*cp == 0) ? cp : cp + 1;
break;
case DEVT_NET:
unit = 0;
if (*np && (*np != ':')) {
unit = strtol(np, &cp, 0); /* get unit number if present */
if (cp == np) {
err = EUNIT;
goto fail;
}
}
if (*cp && (*cp != ':')) {
err = EINVAL;
goto fail;
}
idev->d_kind.netif.unit = unit;
if (path != NULL)
*path = (*cp == 0) ? cp : cp + 1;
break;
default:
err = EINVAL;
goto fail;
}
idev->d_dev = dv;
idev->d_type = dv->dv_type;
if (dev == NULL) {
free(idev);
} else {
*dev = idev;
}
return(0);
fail:
free(idev);
return(err);
}
char *
ski_fmtdev(void *vdev)
{
struct ski_devdesc *dev = (struct ski_devdesc *)vdev;
static char buf[128]; /* XXX device length constant? */
char *cp;
switch(dev->d_type) {
case DEVT_NONE:
strcpy(buf, "(no device)");
break;
case DEVT_DISK:
cp = buf;
cp += sprintf(cp, "%s%d", dev->d_dev->dv_name, dev->d_kind.skidisk.unit);
if (dev->d_kind.skidisk.slice > 0)
cp += sprintf(cp, "s%d", dev->d_kind.skidisk.slice);
if (dev->d_kind.skidisk.partition >= 0)
cp += sprintf(cp, "%c", dev->d_kind.skidisk.partition + 'a');
strcat(cp, ":");
break;
case DEVT_NET:
sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_kind.netif.unit);
break;
}
return(buf);
}
/*
* Set currdev to suit the value being supplied in (value)
*/
int
ski_setcurrdev(struct env_var *ev, int flags, void *value)
{
struct ski_devdesc *ncurr;
int rv;
if ((rv = ski_parsedev(&ncurr, value, NULL)) != 0)
return(rv);
free(ncurr);
env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);
return(0);
}
|
