/*
* 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
i386_parsedev(struct i386_devdesc **dev, const char *devspec, const char **path)
{
struct i386_devdesc *idev;
struct devsw *dv;
int i, unit, 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 i386_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:
err = disk_parsedev((struct disk_devdesc *)idev, np, path);
if (err != 0)
goto fail;
break;
case DEVT_CD:
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;
}
} else {
cp = (char *)np;
}
if (*cp && (*cp != ':')) {
err = EINVAL;
goto fail;
}
idev->d_unit = unit;
if (path != NULL)
*path = (*cp == 0) ? cp : cp + 1;
break;
case DEVT_ZFS:
err = zfs_parsedev((struct zfs_devdesc *)idev, np, path);
if (err != 0)
goto fail;
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);
}
/*
* 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:
*
* fs<unit>:
*/
static int
efi_parsedev(struct devdesc **dev, const char *devspec, const char **path)
{
struct devdesc *idev;
struct devsw *dv;
int i, unit, err;
char *cp;
const char *np;
/* minimum length check */
if (strlen(devspec) < 2)
return (EINVAL);
/* look for a device that matches */
for (i = 0; devsw[i] != NULL; i++) {
dv = devsw[i];
if (!strncmp(devspec, dv->dv_name, strlen(dv->dv_name)))
break;
}
if (devsw[i] == NULL)
return (ENOENT);
np = devspec + strlen(dv->dv_name);
idev = NULL;
err = 0;
switch (dv->dv_type) {
case DEVT_NONE:
break;
case DEVT_DISK:
idev = malloc(sizeof(struct disk_devdesc));
if (idev == NULL)
return (ENOMEM);
err = disk_parsedev((struct disk_devdesc *)idev, np, path);
if (err != 0)
goto fail;
break;
#ifdef EFI_ZFS_BOOT
case DEVT_ZFS:
idev = malloc(sizeof(struct zfs_devdesc));
if (idev == NULL)
return (ENOMEM);
err = zfs_parsedev((struct zfs_devdesc*)idev, np, path);
if (err != 0)
goto fail;
break;
#endif
default:
idev = malloc(sizeof(struct devdesc));
if (idev == NULL)
return (ENOMEM);
unit = 0;
cp = (char *)np;
if (*np != '\0' && *np != ':') {
errno = 0;
unit = strtol(np, &cp, 0);
if (errno != 0 || cp == np) {
err = EUNIT;
goto fail;
}
}
if (*cp != '\0' && *cp != ':') {
err = EINVAL;
goto fail;
}
idev->d_unit = unit;
if (path != NULL)
*path = (*cp == 0) ? cp : cp + 1;
break;
}
idev->d_dev = dv;
idev->d_type = dv->dv_type;
if (dev != NULL)
*dev = idev;
else
free(idev);
return (0);
fail:
free(idev);
return (err);
}
