2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/boot/i386/libi386/devicename.c,v 1.6 2003/08/25 23:28:31 obrien Exp $
27 * $DragonFly: src/sys/boot/pc32/libi386/devicename.c,v 1.4 2007/06/18 05:13:42 dillon Exp $
32 #include <sys/disklabel32.h>
33 #include "bootstrap.h"
36 static int i386_parsedev(struct i386_devdesc **dev, const char *devspec, const char **path);
39 * Point (dev) at an allocated device specifier for the device matching the
40 * path in (devspec). If it contains an explicit device specification,
41 * use that. If not, use the default device.
44 i386_getdev(void **vdev, const char *devspec, const char **path)
46 struct i386_devdesc **dev = (struct i386_devdesc **)vdev;
50 * If it looks like this is just a path and no
51 * device, go with the current device.
53 if ((devspec == NULL) ||
54 (devspec[0] == '/') ||
55 (strchr(devspec, ':') == NULL)) {
57 if (((rv = i386_parsedev(dev, getenv("currdev"), NULL)) == 0) &&
64 * Try to parse the device name off the beginning of the devspec
66 return(i386_parsedev(dev, devspec, path));
70 * Point (dev) at an allocated device specifier matching the string version
71 * at the beginning of (devspec). Return a pointer to the remaining
74 * In all cases, the beginning of (devspec) is compared to the names
75 * of known devices in the device switch, and then any following text
76 * is parsed according to the rules applied to the device type.
78 * For disk-type devices, the syntax is:
80 * disk<unit>[s<slice>][<partition>]:
84 i386_parsedev(struct i386_devdesc **dev, const char *devspec, const char **path)
86 struct i386_devdesc *idev;
88 int i, unit, slice, partition, err;
92 /* minimum length check */
93 if (strlen(devspec) < 2)
96 /* look for a device that matches */
97 for (i = 0, dv = NULL; devsw[i] != NULL; i++) {
98 if (!strncmp(devspec, devsw[i]->dv_name, strlen(devsw[i]->dv_name))) {
105 idev = malloc(sizeof(struct i386_devdesc));
107 np = (devspec + strlen(dv->dv_name));
109 switch(dv->dv_type) {
110 case DEVT_NONE: /* XXX what to do here? Do we care? */
117 if (*np && (*np != ':')) {
118 unit = strtol(np, &cp, 10); /* next comes the unit number */
123 if (*cp == 's') { /* got a slice number */
125 slice = strtol(np, &cp, 10);
131 if (*cp && (*cp != ':')) {
132 partition = *cp - 'a'; /* get a partition number */
133 if ((partition < 0) || (partition >= MAXPARTITIONS32)) {
140 if (*cp && (*cp != ':')) {
145 idev->d_kind.biosdisk.unit = unit;
146 idev->d_kind.biosdisk.slice = slice;
147 idev->d_kind.biosdisk.partition = partition;
149 *path = (*cp == 0) ? cp : cp + 1;
156 if (*np && (*np != ':')) {
157 unit = strtol(np, &cp, 0); /* get unit number if present */
163 if (*cp && (*cp != ':')) {
168 if (dv->dv_type == DEVT_NET)
169 idev->d_kind.netif.unit = unit;
171 idev->d_kind.bioscd.unit = unit;
173 *path = (*cp == 0) ? cp : cp + 1;
181 idev->d_type = dv->dv_type;
196 i386_fmtdev(void *vdev)
198 struct i386_devdesc *dev = (struct i386_devdesc *)vdev;
199 static char buf[128]; /* XXX device length constant? */
202 switch(dev->d_type) {
204 strcpy(buf, "(no device)");
208 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_kind.bioscd.unit);
213 cp += sprintf(cp, "%s%d", dev->d_dev->dv_name, dev->d_kind.biosdisk.unit);
214 if (dev->d_kind.biosdisk.slice > 0)
215 cp += sprintf(cp, "s%d", dev->d_kind.biosdisk.slice);
216 if (dev->d_kind.biosdisk.partition >= 0)
217 cp += sprintf(cp, "%c", dev->d_kind.biosdisk.partition + 'a');
222 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_kind.netif.unit);
230 * Set currdev to suit the value being supplied in (value)
233 i386_setcurrdev(struct env_var *ev, int flags, const void *value)
235 struct i386_devdesc *ncurr;
238 if ((rv = i386_parsedev(&ncurr, value, NULL)) != 0)
241 env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);