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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
32 #include <sys/disklabel.h>
34 #include "bootstrap.h"
36 #include "libuserboot.h"
38 static int userboot_parsedev(struct disk_devdesc **dev, const char *devspec, const char **path);
41 * Point (dev) at an allocated device specifier for the device matching the
42 * path in (devspec). If it contains an explicit device specification,
43 * use that. If not, use the default device.
46 userboot_getdev(void **vdev, const char *devspec, const char **path)
48 struct disk_devdesc **dev = (struct disk_devdesc **)vdev;
52 * If it looks like this is just a path and no
53 * device, go with the current device.
55 if ((devspec == NULL) ||
56 (devspec[0] == '/') ||
57 (strchr(devspec, ':') == NULL)) {
59 if (((rv = userboot_parsedev(dev, getenv("currdev"), NULL)) == 0) &&
66 * Try to parse the device name off the beginning of the devspec
68 return(userboot_parsedev(dev, devspec, path));
72 * Point (dev) at an allocated device specifier matching the string version
73 * at the beginning of (devspec). Return a pointer to the remaining
76 * In all cases, the beginning of (devspec) is compared to the names
77 * of known devices in the device switch, and then any following text
78 * is parsed according to the rules applied to the device type.
80 * For disk-type devices, the syntax is:
82 * disk<unit>[s<slice>][<partition>]:
86 userboot_parsedev(struct disk_devdesc **dev, const char *devspec, const char **path)
88 struct disk_devdesc *idev;
90 int i, unit, slice, partition, err;
94 /* minimum length check */
95 if (strlen(devspec) < 2)
98 /* look for a device that matches */
99 for (i = 0, dv = NULL; devsw[i] != NULL; i++) {
100 if (!strncmp(devspec, devsw[i]->dv_name, strlen(devsw[i]->dv_name))) {
107 idev = malloc(sizeof(struct disk_devdesc));
109 np = (devspec + strlen(dv->dv_name));
111 switch(dv->dv_type) {
112 case DEVT_NONE: /* XXX what to do here? Do we care? */
119 if (*np && (*np != ':')) {
120 unit = strtol(np, &cp, 10); /* next comes the unit number */
125 #ifdef LOADER_GPT_SUPPORT
126 if (*cp == 'p') { /* got a GPT partition */
128 slice = strtol(np, &cp, 10);
133 if (*cp && (*cp != ':')) {
140 if (*cp == 's') { /* got a slice number */
142 slice = strtol(np, &cp, 10);
148 if (*cp && (*cp != ':')) {
149 partition = *cp - 'a'; /* got a partition number */
150 if ((partition < 0) || (partition >= MAXPARTITIONS)) {
156 #ifdef LOADER_GPT_SUPPORT
162 if (*cp && (*cp != ':')) {
168 idev->d_slice = slice;
169 idev->d_partition = partition;
171 *path = (*cp == 0) ? cp : cp + 1;
179 if (*np && (*np != ':')) {
180 unit = strtol(np, &cp, 0); /* get unit number if present */
188 if (*cp && (*cp != ':')) {
195 *path = (*cp == 0) ? cp : cp + 1;
203 idev->d_type = dv->dv_type;
218 userboot_fmtdev(void *vdev)
220 struct disk_devdesc *dev = (struct disk_devdesc *)vdev;
221 static char buf[128]; /* XXX device length constant? */
224 switch(dev->d_type) {
226 strcpy(buf, "(no device)");
230 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
235 cp += sprintf(cp, "%s%d", dev->d_dev->dv_name, dev->d_unit);
236 #ifdef LOADER_GPT_SUPPORT
237 if (dev->d_partition == 0xff) {
238 cp += sprintf(cp, "p%d", dev->d_slice);
241 if (dev->d_slice > 0)
242 cp += sprintf(cp, "s%d", dev->d_slice);
243 if (dev->d_partition >= 0)
244 cp += sprintf(cp, "%c", dev->d_partition + 'a');
245 #ifdef LOADER_GPT_SUPPORT
253 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
261 * Set currdev to suit the value being supplied in (value)
264 userboot_setcurrdev(struct env_var *ev, int flags, const void *value)
266 struct disk_devdesc *ncurr;
269 if ((rv = userboot_parsedev(&ncurr, value, NULL)) != 0)
272 env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);