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,
45 * Point (dev) at an allocated device specifier for the device matching the
46 * path in (devspec). If it contains an explicit device specification,
47 * use that. If not, use the default device.
50 userboot_getdev(void **vdev, const char *devspec, const char **path)
52 struct disk_devdesc **dev = (struct disk_devdesc **)vdev;
56 * If it looks like this is just a path and no
57 * device, go with the current device.
59 if ((devspec == NULL) ||
60 (devspec[0] == '/') ||
61 (strchr(devspec, ':') == NULL)) {
63 rv = userboot_parsedev(dev, getenv("currdev"), NULL);
64 if (rv == 0 && path != NULL)
70 * Try to parse the device name off the beginning of the devspec
72 return (userboot_parsedev(dev, devspec, path));
76 * Point (dev) at an allocated device specifier matching the string version
77 * at the beginning of (devspec). Return a pointer to the remaining
80 * In all cases, the beginning of (devspec) is compared to the names
81 * of known devices in the device switch, and then any following text
82 * is parsed according to the rules applied to the device type.
84 * For disk-type devices, the syntax is:
86 * disk<unit>[s<slice>][<partition>]:
90 userboot_parsedev(struct disk_devdesc **dev, const char *devspec,
93 struct disk_devdesc *idev;
99 /* minimum length check */
100 if (strlen(devspec) < 2)
103 /* look for a device that matches */
104 for (i = 0, dv = NULL; devsw[i] != NULL; i++) {
105 if (strncmp(devspec, devsw[i]->dv_name,
106 strlen(devsw[i]->dv_name)) == 0) {
113 idev = malloc(sizeof(struct disk_devdesc));
115 np = (devspec + strlen(dv->dv_name));
117 switch (dv->dv_type) {
118 case DEVT_NONE: /* XXX what to do here? Do we care? */
122 err = disk_parsedev(idev, np, path);
131 if (*np && (*np != ':')) {
132 /* get unit number if present */
133 unit = strtol(np, (char **)&cp, 0);
141 if (*cp && (*cp != ':')) {
146 idev->dd.d_unit = unit;
148 *path = (*cp == 0) ? cp : cp + 1;
152 #if defined(USERBOOT_ZFS_SUPPORT)
153 err = zfs_parsedev((struct zfs_devdesc *)idev, np, path);
180 userboot_fmtdev(void *vdev)
182 struct devdesc *dev = (struct devdesc *)vdev;
183 static char buf[128]; /* XXX device length constant? */
185 switch(dev->d_dev->dv_type) {
187 strcpy(buf, "(no device)");
191 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
195 return (disk_fmtdev(vdev));
198 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
202 #if defined(USERBOOT_ZFS_SUPPORT)
203 return (zfs_fmtdev(vdev));
205 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
214 * Set currdev to suit the value being supplied in (value)
217 userboot_setcurrdev(struct env_var *ev, int flags, const void *value)
219 struct disk_devdesc *ncurr;
222 if ((rv = userboot_parsedev(&ncurr, value, NULL)) != 0)
225 env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);