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 #if defined(USERBOOT_ZFS_SUPPORT)
41 static int userboot_parsedev(struct disk_devdesc **dev, const char *devspec, const char **path);
44 * Point (dev) at an allocated device specifier for the device matching the
45 * path in (devspec). If it contains an explicit device specification,
46 * use that. If not, use the default device.
49 userboot_getdev(void **vdev, const char *devspec, const char **path)
51 struct disk_devdesc **dev = (struct disk_devdesc **)vdev;
55 * If it looks like this is just a path and no
56 * device, go with the current device.
58 if ((devspec == NULL) ||
59 (devspec[0] == '/') ||
60 (strchr(devspec, ':') == NULL)) {
62 if (((rv = userboot_parsedev(dev, getenv("currdev"), NULL)) == 0) &&
69 * Try to parse the device name off the beginning of the devspec
71 return(userboot_parsedev(dev, devspec, path));
75 * Point (dev) at an allocated device specifier matching the string version
76 * at the beginning of (devspec). Return a pointer to the remaining
79 * In all cases, the beginning of (devspec) is compared to the names
80 * of known devices in the device switch, and then any following text
81 * is parsed according to the rules applied to the device type.
83 * For disk-type devices, the syntax is:
85 * disk<unit>[s<slice>][<partition>]:
89 userboot_parsedev(struct disk_devdesc **dev, const char *devspec, const char **path)
91 struct disk_devdesc *idev;
97 /* minimum length check */
98 if (strlen(devspec) < 2)
101 /* look for a device that matches */
102 for (i = 0, dv = NULL; devsw[i] != NULL; i++) {
103 if (!strncmp(devspec, devsw[i]->dv_name, strlen(devsw[i]->dv_name))) {
110 idev = malloc(sizeof(struct disk_devdesc));
112 np = (devspec + strlen(dv->dv_name));
114 switch(dv->dv_type) {
115 case DEVT_NONE: /* XXX what to do here? Do we care? */
119 err = disk_parsedev(idev, np, path);
128 if (*np && (*np != ':')) {
129 unit = strtol(np, (char **)&cp, 0); /* get unit number if present */
137 if (*cp && (*cp != ':')) {
142 idev->dd.d_unit = unit;
144 *path = (*cp == 0) ? cp : cp + 1;
148 #if defined(USERBOOT_ZFS_SUPPORT)
149 err = zfs_parsedev((struct zfs_devdesc *)idev, np, path);
176 userboot_fmtdev(void *vdev)
178 struct devdesc *dev = (struct devdesc *)vdev;
179 static char buf[128]; /* XXX device length constant? */
181 switch(dev->d_dev->dv_type) {
183 strcpy(buf, "(no device)");
187 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
191 return (disk_fmtdev(vdev));
194 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
198 #if defined(USERBOOT_ZFS_SUPPORT)
199 return (zfs_fmtdev(vdev));
201 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
210 * Set currdev to suit the value being supplied in (value)
213 userboot_setcurrdev(struct env_var *ev, int flags, const void *value)
215 struct disk_devdesc *ncurr;
218 if ((rv = userboot_parsedev(&ncurr, value, NULL)) != 0)
221 env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);