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
26 * $FreeBSD: src/sys/boot/efi/libefi/devicename.c,v 1.2 2001/09/07 08:49:47 dfr Exp $
27 * $DragonFly: src/sys/boot/efi/libefi/devicename.c,v 1.3 2007/06/18 05:13:41 dillon Exp $
32 #include "bootstrap.h"
38 static int efi_parsedev(struct efi_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 efi_getdev(void **vdev, const char *devspec, const char **path)
48 struct efi_devdesc **dev = (struct efi_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 = efi_parsedev(dev, getenv("currdev"), NULL)) == 0) &&
66 * Try to parse the device name off the beginning of the devspec
68 return(efi_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 efi_parsedev(struct efi_devdesc **dev, const char *devspec, const char **path)
88 struct efi_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))) {
108 idev = malloc(sizeof(struct efi_devdesc));
110 np = (devspec + strlen(dv->dv_name));
112 switch(dv->dv_type) {
113 case DEVT_NONE: /* XXX what to do here? Do we care? */
120 if (*np && (*np != ':')) {
121 unit = strtol(np, &cp, 10); /* next comes the unit number */
126 if (*cp == 's') { /* got a slice number */
128 slice = strtol(np, &cp, 10);
134 if (*cp && (*cp != ':')) {
135 partition = *cp - 'a'; /* get a partition number */
136 if ((partition < 0) || (partition >= MAXPARTITIONS32)) {
143 if (*cp && (*cp != ':')) {
148 idev->d_kind.efidisk.unit = unit;
149 idev->d_kind.efidisk.slice = slice;
150 idev->d_kind.efidisk.partition = partition;
153 *path = (*cp == 0) ? cp : cp + 1;
159 if (*np && (*np != ':')) {
160 unit = strtol(np, &cp, 0); /* get unit number if present */
166 if (*cp && (*cp != ':')) {
171 idev->d_kind.netif.unit = unit;
173 *path = (*cp == 0) ? cp : cp + 1;
181 idev->d_type = dv->dv_type;
196 efi_fmtdev(void *vdev)
198 struct efi_devdesc *dev = (struct efi_devdesc *)vdev;
199 static char buf[128]; /* XXX device length constant? */
202 switch(dev->d_type) {
204 strcpy(buf, "(no device)");
209 cp += sprintf(cp, "%s%d", dev->d_dev->dv_name, dev->d_kind.efidisk.unit);
210 if (dev->d_kind.efidisk.slice > 0)
211 cp += sprintf(cp, "s%d", dev->d_kind.efidisk.slice);
212 if (dev->d_kind.efidisk.partition >= 0)
213 cp += sprintf(cp, "%c", dev->d_kind.efidisk.partition + 'a');
218 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_kind.netif.unit);
226 * Set currdev to suit the value being supplied in (value)
229 efi_setcurrdev(struct env_var *ev, int flags, void *value)
231 struct efi_devdesc *ncurr;
234 if ((rv = efi_parsedev(&ncurr, value, NULL)) != 0)
237 env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);