diff options
Diffstat (limited to 'sys/boot/ia64/ski/devicename.c')
| -rw-r--r-- | sys/boot/ia64/ski/devicename.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/sys/boot/ia64/ski/devicename.c b/sys/boot/ia64/ski/devicename.c new file mode 100644 index 0000000..35356c3 --- /dev/null +++ b/sys/boot/ia64/ski/devicename.c @@ -0,0 +1,237 @@ +/*- + * 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. + * + * $FreeBSD$ + */ + +#include <stand.h> +#include <string.h> +#include <sys/disklabel.h> +#include "bootstrap.h" +#include "libski.h" + +static int ski_parsedev(struct ski_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 +ski_getdev(void **vdev, const char *devspec, const char **path) +{ + struct ski_devdesc **dev = (struct ski_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 = ski_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(ski_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 +ski_parsedev(struct ski_devdesc **dev, const char *devspec, const char **path) +{ + struct ski_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 ski_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; + } + 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'; /* get a partition number */ + if ((partition < 0) || (partition >= MAXPARTITIONS)) { + err = EPART; + goto fail; + } + cp++; + } + } + if (*cp && (*cp != ':')) { + err = EINVAL; + goto fail; + } + + idev->d_kind.skidisk.unit = unit; + idev->d_kind.skidisk.slice = slice; + idev->d_kind.skidisk.partition = partition; + + if (path != NULL) + *path = (*cp == 0) ? cp : cp + 1; + break; + + case DEVT_NET: + unit = 0; + + if (*np && (*np != ':')) { + unit = strtol(np, &cp, 0); /* get unit number if present */ + if (cp == np) { + err = EUNIT; + goto fail; + } + } + if (*cp && (*cp != ':')) { + err = EINVAL; + goto fail; + } + + idev->d_kind.netif.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 * +ski_fmtdev(void *vdev) +{ + struct ski_devdesc *dev = (struct ski_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_DISK: + cp = buf; + cp += sprintf(cp, "%s%d", dev->d_dev->dv_name, dev->d_kind.skidisk.unit); + if (dev->d_kind.skidisk.slice > 0) + cp += sprintf(cp, "s%d", dev->d_kind.skidisk.slice); + if (dev->d_kind.skidisk.partition >= 0) + cp += sprintf(cp, "%c", dev->d_kind.skidisk.partition + 'a'); + strcat(cp, ":"); + break; + + case DEVT_NET: + sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_kind.netif.unit); + break; + } + return(buf); +} + + +/* + * Set currdev to suit the value being supplied in (value) + */ +int +ski_setcurrdev(struct env_var *ev, int flags, void *value) +{ + struct ski_devdesc *ncurr; + int rv; + + if ((rv = ski_parsedev(&ncurr, value, NULL)) != 0) + return(rv); + free(ncurr); + env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL); + return(0); +} + |
