+ int i, error = -1;
+ char *dir, *env, *envdup;
+
+ env = getenv("ZPOOL_IMPORT_PATH");
+ errno = ENOENT;
+
+ if (env) {
+ envdup = strdup(env);
+ dir = strtok(envdup, ":");
+ while (dir && error) {
+ (void) snprintf(path, len, "%s/%s", dir, name);
+ error = access(path, F_OK);
+ dir = strtok(NULL, ":");
+ }
+ free(envdup);
+ } else {
+ for (i = 0; i < DEFAULT_IMPORT_PATH_SIZE && error < 0; i++) {
+ (void) snprintf(path, len, "%s/%s",
+ zpool_default_import_path[i], name);
+ error = access(path, F_OK);
+ }
+ }
+
+ return (error ? ENOENT : 0);
+}
+
+/*
+ * Given a shorthand device name look for a match against 'cmp_name'. This
+ * is done by checking all prefix expansions using either the default
+ * 'zpool_default_import_paths' or the ZPOOL_IMPORT_PATH environment
+ * variable. Proper partition suffixes will be appended if this is a
+ * whole disk. When a match is found 0 is returned otherwise ENOENT.
+ */
+static int
+zfs_strcmp_shortname(char *name, char *cmp_name, int wholedisk)
+{
+ int path_len, cmp_len, i = 0, error = ENOENT;
+ char *dir, *env, *envdup = NULL;
+ char path_name[MAXPATHLEN];
+
+ cmp_len = strlen(cmp_name);
+ env = getenv("ZPOOL_IMPORT_PATH");
+
+ if (env) {
+ envdup = strdup(env);
+ dir = strtok(envdup, ":");
+ } else {
+ dir = zpool_default_import_path[i];
+ }
+
+ while (dir) {
+ /* Trim trailing directory slashes from ZPOOL_IMPORT_PATH */
+ while (dir[strlen(dir)-1] == '/')
+ dir[strlen(dir)-1] = '\0';
+
+ path_len = snprintf(path_name, MAXPATHLEN, "%s/%s", dir, name);
+ if (wholedisk)
+ path_len = zfs_append_partition(path_name, MAXPATHLEN);
+
+ if ((path_len == cmp_len) && !strcmp(path_name, cmp_name)) {
+ error = 0;
+ break;
+ }
+
+ if (env) {
+ dir = strtok(NULL, ":");
+ } else if (++i < DEFAULT_IMPORT_PATH_SIZE) {
+ dir = zpool_default_import_path[i];
+ } else {
+ dir = NULL;
+ }
+ }
+
+ if (env)
+ free(envdup);
+
+ return (error);
+}
+
+/*
+ * Given either a shorthand or fully qualified path name look for a match
+ * against 'cmp'. The passed name will be expanded as needed for comparison
+ * purposes and redundant slashes stripped to ensure an accurate match.
+ */
+int
+zfs_strcmp_pathname(char *name, char *cmp, int wholedisk)
+{
+ int path_len, cmp_len;
+ char path_name[MAXPATHLEN];
+ char cmp_name[MAXPATHLEN];
+ char *dir;
+
+ /* Strip redundant slashes if one exists due to ZPOOL_IMPORT_PATH */
+ memset(cmp_name, 0, MAXPATHLEN);
+ dir = strtok(cmp, "/");
+ while (dir) {
+ strcat(cmp_name, "/");
+ strcat(cmp_name, dir);
+ dir = strtok(NULL, "/");
+ }
+
+ if (name[0] != '/')
+ return zfs_strcmp_shortname(name, cmp_name, wholedisk);
+
+ strncpy(path_name, name, MAXPATHLEN);
+ path_len = strlen(path_name);
+ cmp_len = strlen(cmp_name);
+
+ if (wholedisk) {
+ path_len = zfs_append_partition(path_name, MAXPATHLEN);
+ if (path_len == -1)
+ return (ENOMEM);
+ }
+
+ if ((path_len != cmp_len) || strcmp(path_name, cmp_name))
+ return (ENOENT);
+
+ return (0);