diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/libzfs/libzfs_util.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/lib/libzfs/libzfs_util.c b/lib/libzfs/libzfs_util.c index d72b7c0fc..01995f802 100644 --- a/lib/libzfs/libzfs_util.c +++ b/lib/libzfs/libzfs_util.c @@ -802,6 +802,46 @@ zfs_path_to_zhandle(libzfs_handle_t *hdl, char *path, zfs_type_t argtype) } /* + * Given a shorthand device name, check if a file by that name exists in a list + * of directories under /dev. If one is found, store its full path in the + * buffer pointed to by the path argument and return 0, else return -1. The + * path buffer must be allocated by the caller. + */ +int +zfs_resolve_shortname(const char *name, char *path, size_t pathlen) +{ + int i, err; + char dirs[5][9] = {"by-id", "by-label", "by-path", "by-uuid", "zpool"}; + + (void) snprintf(path, pathlen, "%s/%s", DISK_ROOT, name); + err = access(path, F_OK); + for (i = 0; i < 5 && err < 0; i++) { + (void) snprintf(path, pathlen, "%s/%s/%s", + UDISK_ROOT, dirs[i], name); + err = access(path, F_OK); + } + return err; +} + +/* + * Append partition suffix to a device path. This should be used to generate + * the name of a whole disk as it is stored in the vdev label. The + * user-visible names of whole disks do not contain the partition information. + * Modifies buf which must be allocated by the caller. + */ +void +zfs_append_partition(const char *path, char *buf, size_t buflen) +{ + if (strncmp(path, UDISK_ROOT, strlen(UDISK_ROOT)) == 0) + (void) snprintf(buf, buflen, "%s%s%s", path, "-part", + FIRST_SLICE); + else + (void) snprintf(buf, buflen, "%s%s%s", path, + isdigit(path[strlen(path)-1]) ? "p" : "", + FIRST_SLICE); +} + +/* * Initialize the zc_nvlist_dst member to prepare for receiving an nvlist from * an ioctl(). */ |