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("$FreeBSD$");
33 #include "bootstrap.h"
35 #include "libuserboot.h"
37 static int userboot_parsedev(struct disk_devdesc **dev, const char *devspec, const char **path);
40 * Point (dev) at an allocated device specifier for the device matching the
41 * path in (devspec). If it contains an explicit device specification,
42 * use that. If not, use the default device.
45 userboot_getdev(void **vdev, const char *devspec, const char **path)
47 struct disk_devdesc **dev = (struct disk_devdesc **)vdev;
51 * If it looks like this is just a path and no
52 * device, go with the current device.
54 if ((devspec == NULL) ||
55 (devspec[0] == '/') ||
56 (strchr(devspec, ':') == NULL)) {
58 if (((rv = userboot_parsedev(dev, getenv("currdev"), NULL)) == 0) &&
65 * Try to parse the device name off the beginning of the devspec
67 return(userboot_parsedev(dev, devspec, path));
71 * Point (dev) at an allocated device specifier matching the string version
72 * at the beginning of (devspec). Return a pointer to the remaining
75 * In all cases, the beginning of (devspec) is compared to the names
76 * of known devices in the device switch, and then any following text
77 * is parsed according to the rules applied to the device type.
79 * For disk-type devices, the syntax is:
81 * disk<unit>[s<slice>][<partition>]:
85 userboot_parsedev(struct disk_devdesc **dev, const char *devspec, const char **path)
87 struct disk_devdesc *idev;
93 /* minimum length check */
94 if (strlen(devspec) < 2)
97 /* look for a device that matches */
98 for (i = 0, dv = NULL; devsw[i] != NULL; i++) {
99 if (!strncmp(devspec, devsw[i]->dv_name, strlen(devsw[i]->dv_name))) {
106 idev = malloc(sizeof(struct disk_devdesc));
108 np = (devspec + strlen(dv->dv_name));
110 switch(dv->dv_type) {
111 case DEVT_NONE: /* XXX what to do here? Do we care? */
115 err = disk_parsedev(idev, np, path);
125 if (*np && (*np != ':')) {
126 unit = strtol(np, &cp, 0); /* get unit number if present */
134 if (*cp && (*cp != ':')) {
141 *path = (*cp == 0) ? cp : cp + 1;
149 idev->d_type = dv->dv_type;
164 userboot_fmtdev(void *vdev)
166 struct disk_devdesc *dev = (struct disk_devdesc *)vdev;
167 static char buf[128]; /* XXX device length constant? */
169 switch(dev->d_type) {
171 strcpy(buf, "(no device)");
175 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
179 return (disk_fmtdev(vdev));
183 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
191 * Set currdev to suit the value being supplied in (value)
194 userboot_setcurrdev(struct env_var *ev, int flags, const void *value)
196 struct disk_devdesc *ncurr;
199 if ((rv = userboot_parsedev(&ncurr, value, NULL)) != 0)
202 env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);