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
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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
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26 * $FreeBSD: src/sys/boot/i386/libi386/devicename.c,v 1.4.2.1 2001/12/21 22:19:58 jhb Exp $
31 #include <sys/disklabel.h>
32 #include "bootstrap.h"
35 static int i386_parsedev(struct i386_devdesc **dev, const char *devspec, const char **path);
38 * Point (dev) at an allocated device specifier for the device matching the
39 * path in (devspec). If it contains an explicit device specification,
40 * use that. If not, use the default device.
43 i386_getdev(void **vdev, const char *devspec, const char **path)
45 struct i386_devdesc **dev = (struct i386_devdesc **)vdev;
49 * If it looks like this is just a path and no
50 * device, go with the current device.
52 if ((devspec == NULL) ||
53 (devspec[0] == '/') ||
54 (strchr(devspec, ':') == NULL)) {
56 if (((rv = i386_parsedev(dev, getenv("currdev"), NULL)) == 0) &&
63 * Try to parse the device name off the beginning of the devspec
65 return(i386_parsedev(dev, devspec, path));
69 * Point (dev) at an allocated device specifier matching the string version
70 * at the beginning of (devspec). Return a pointer to the remaining
73 * In all cases, the beginning of (devspec) is compared to the names
74 * of known devices in the device switch, and then any following text
75 * is parsed according to the rules applied to the device type.
77 * For disk-type devices, the syntax is:
79 * disk<unit>[s<slice>][<partition>]:
83 i386_parsedev(struct i386_devdesc **dev, const char *devspec, const char **path)
85 struct i386_devdesc *idev;
87 int i, unit, slice, partition, err;
91 /* minimum length check */
92 if (strlen(devspec) < 2)
95 /* look for a device that matches */
96 for (i = 0, dv = NULL; devsw[i] != NULL; i++) {
97 if (!strncmp(devspec, devsw[i]->dv_name, strlen(devsw[i]->dv_name))) {
104 idev = malloc(sizeof(struct i386_devdesc));
106 np = (devspec + strlen(dv->dv_name));
108 switch(dv->dv_type) {
109 case DEVT_NONE: /* XXX what to do here? Do we care? */
116 if (*np && (*np != ':')) {
117 unit = strtol(np, &cp, 10); /* next comes the unit number */
122 if (*cp == 's') { /* got a slice number */
124 slice = strtol(np, &cp, 10);
130 if (*cp && (*cp != ':')) {
131 partition = *cp - 'a'; /* get a partition number */
132 if ((partition < 0) || (partition >= MAXPARTITIONS)) {
139 if (*cp && (*cp != ':')) {
144 idev->d_kind.biosdisk.unit = unit;
145 idev->d_kind.biosdisk.slice = slice;
146 idev->d_kind.biosdisk.partition = partition;
148 *path = (*cp == 0) ? cp : cp + 1;
155 if (*np && (*np != ':')) {
156 unit = strtol(np, &cp, 0); /* get unit number if present */
162 if (*cp && (*cp != ':')) {
167 if (dv->dv_type == DEVT_NET)
168 idev->d_kind.netif.unit = unit;
170 idev->d_kind.bioscd.unit = unit;
172 *path = (*cp == 0) ? cp : cp + 1;
180 idev->d_type = dv->dv_type;
195 i386_fmtdev(void *vdev)
197 struct i386_devdesc *dev = (struct i386_devdesc *)vdev;
198 static char buf[128]; /* XXX device length constant? */
201 switch(dev->d_type) {
203 strcpy(buf, "(no device)");
207 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_kind.bioscd.unit);
212 cp += sprintf(cp, "%s%d", dev->d_dev->dv_name, dev->d_kind.biosdisk.unit);
213 if (dev->d_kind.biosdisk.slice > 0)
214 cp += sprintf(cp, "s%d", dev->d_kind.biosdisk.slice);
215 if (dev->d_kind.biosdisk.partition >= 0)
216 cp += sprintf(cp, "%c", dev->d_kind.biosdisk.partition + 'a');
221 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_kind.netif.unit);
229 * Set currdev to suit the value being supplied in (value)
232 i386_setcurrdev(struct env_var *ev, int flags, void *value)
234 struct i386_devdesc *ncurr;
237 if ((rv = i386_parsedev(&ncurr, value, NULL)) != 0)
240 env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);