summaryrefslogtreecommitdiffstats
path: root/sys/boot/userboot/userboot/devicename.c
diff options
context:
space:
mode:
Diffstat (limited to 'sys/boot/userboot/userboot/devicename.c')
-rw-r--r--sys/boot/userboot/userboot/devicename.c274
1 files changed, 274 insertions, 0 deletions
diff --git a/sys/boot/userboot/userboot/devicename.c b/sys/boot/userboot/userboot/devicename.c
new file mode 100644
index 0000000..24c5179
--- /dev/null
+++ b/sys/boot/userboot/userboot/devicename.c
@@ -0,0 +1,274 @@
+/*-
+ * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stand.h>
+#include <string.h>
+#include <sys/disklabel.h>
+
+#include "bootstrap.h"
+#include "disk.h"
+#include "libuserboot.h"
+
+static int userboot_parsedev(struct disk_devdesc **dev, const char *devspec, const char **path);
+
+/*
+ * Point (dev) at an allocated device specifier for the device matching the
+ * path in (devspec). If it contains an explicit device specification,
+ * use that. If not, use the default device.
+ */
+int
+userboot_getdev(void **vdev, const char *devspec, const char **path)
+{
+ struct disk_devdesc **dev = (struct disk_devdesc **)vdev;
+ int rv;
+
+ /*
+ * If it looks like this is just a path and no
+ * device, go with the current device.
+ */
+ if ((devspec == NULL) ||
+ (devspec[0] == '/') ||
+ (strchr(devspec, ':') == NULL)) {
+
+ if (((rv = userboot_parsedev(dev, getenv("currdev"), NULL)) == 0) &&
+ (path != NULL))
+ *path = devspec;
+ return(rv);
+ }
+
+ /*
+ * Try to parse the device name off the beginning of the devspec
+ */
+ return(userboot_parsedev(dev, devspec, path));
+}
+
+/*
+ * Point (dev) at an allocated device specifier matching the string version
+ * at the beginning of (devspec). Return a pointer to the remaining
+ * text in (path).
+ *
+ * In all cases, the beginning of (devspec) is compared to the names
+ * of known devices in the device switch, and then any following text
+ * is parsed according to the rules applied to the device type.
+ *
+ * For disk-type devices, the syntax is:
+ *
+ * disk<unit>[s<slice>][<partition>]:
+ *
+ */
+static int
+userboot_parsedev(struct disk_devdesc **dev, const char *devspec, const char **path)
+{
+ struct disk_devdesc *idev;
+ struct devsw *dv;
+ int i, unit, slice, partition, err;
+ char *cp;
+ const char *np;
+
+ /* minimum length check */
+ if (strlen(devspec) < 2)
+ return(EINVAL);
+
+ /* look for a device that matches */
+ for (i = 0, dv = NULL; devsw[i] != NULL; i++) {
+ if (!strncmp(devspec, devsw[i]->dv_name, strlen(devsw[i]->dv_name))) {
+ dv = devsw[i];
+ break;
+ }
+ }
+ if (dv == NULL)
+ return(ENOENT);
+ idev = malloc(sizeof(struct disk_devdesc));
+ err = 0;
+ np = (devspec + strlen(dv->dv_name));
+
+ switch(dv->dv_type) {
+ case DEVT_NONE: /* XXX what to do here? Do we care? */
+ break;
+
+ case DEVT_DISK:
+ unit = -1;
+ slice = -1;
+ partition = -1;
+ if (*np && (*np != ':')) {
+ unit = strtol(np, &cp, 10); /* next comes the unit number */
+ if (cp == np) {
+ err = EUNIT;
+ goto fail;
+ }
+#ifdef LOADER_GPT_SUPPORT
+ if (*cp == 'p') { /* got a GPT partition */
+ np = cp + 1;
+ slice = strtol(np, &cp, 10);
+ if (cp == np) {
+ err = ESLICE;
+ goto fail;
+ }
+ if (*cp && (*cp != ':')) {
+ err = EINVAL;
+ goto fail;
+ }
+ partition = 0xff;
+ } else {
+#endif
+ if (*cp == 's') { /* got a slice number */
+ np = cp + 1;
+ slice = strtol(np, &cp, 10);
+ if (cp == np) {
+ err = ESLICE;
+ goto fail;
+ }
+ }
+ if (*cp && (*cp != ':')) {
+ partition = *cp - 'a'; /* got a partition number */
+ if ((partition < 0) || (partition >= MAXPARTITIONS)) {
+ err = EPART;
+ goto fail;
+ }
+ cp++;
+ }
+#ifdef LOADER_GPT_SUPPORT
+ }
+#endif
+ } else {
+ cp = np;
+ }
+ if (*cp && (*cp != ':')) {
+ err = EINVAL;
+ goto fail;
+ }
+
+ idev->d_unit = unit;
+ idev->d_slice = slice;
+ idev->d_partition = partition;
+ if (path != NULL)
+ *path = (*cp == 0) ? cp : cp + 1;
+ break;
+
+ case DEVT_CD:
+ case DEVT_NET:
+ case DEVT_ZFS:
+ unit = 0;
+
+ if (*np && (*np != ':')) {
+ unit = strtol(np, &cp, 0); /* get unit number if present */
+ if (cp == np) {
+ err = EUNIT;
+ goto fail;
+ }
+ } else {
+ cp = np;
+ }
+ if (*cp && (*cp != ':')) {
+ err = EINVAL;
+ goto fail;
+ }
+
+ idev->d_unit = unit;
+ if (path != NULL)
+ *path = (*cp == 0) ? cp : cp + 1;
+ break;
+
+ default:
+ err = EINVAL;
+ goto fail;
+ }
+ idev->d_dev = dv;
+ idev->d_type = dv->dv_type;
+ if (dev == NULL) {
+ free(idev);
+ } else {
+ *dev = idev;
+ }
+ return(0);
+
+ fail:
+ free(idev);
+ return(err);
+}
+
+
+char *
+userboot_fmtdev(void *vdev)
+{
+ struct disk_devdesc *dev = (struct disk_devdesc *)vdev;
+ static char buf[128]; /* XXX device length constant? */
+ char *cp;
+
+ switch(dev->d_type) {
+ case DEVT_NONE:
+ strcpy(buf, "(no device)");
+ break;
+
+ case DEVT_CD:
+ sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
+ break;
+
+ case DEVT_DISK:
+ cp = buf;
+ cp += sprintf(cp, "%s%d", dev->d_dev->dv_name, dev->d_unit);
+#ifdef LOADER_GPT_SUPPORT
+ if (dev->d_partition == 0xff) {
+ cp += sprintf(cp, "p%d", dev->d_slice);
+ } else {
+#endif
+ if (dev->d_slice > 0)
+ cp += sprintf(cp, "s%d", dev->d_slice);
+ if (dev->d_partition >= 0)
+ cp += sprintf(cp, "%c", dev->d_partition + 'a');
+#ifdef LOADER_GPT_SUPPORT
+ }
+#endif
+ strcat(cp, ":");
+ break;
+
+ case DEVT_NET:
+ case DEVT_ZFS:
+ sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
+ break;
+ }
+ return(buf);
+}
+
+
+/*
+ * Set currdev to suit the value being supplied in (value)
+ */
+int
+userboot_setcurrdev(struct env_var *ev, int flags, const void *value)
+{
+ struct disk_devdesc *ncurr;
+ int rv;
+
+ if ((rv = userboot_parsedev(&ncurr, value, NULL)) != 0)
+ return(rv);
+ free(ncurr);
+ env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);
+ return(0);
+}
OpenPOWER on IntegriCloud