+
+int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name) {
+ Unit *other;
+ int r;
+
+ if ((r = manager_load_unit(u->meta.manager, name, &other)) < 0)
+ return r;
+
+ if ((r = unit_add_dependency(u, d, other)) < 0)
+ return r;
+
+ return 0;
+}
+
+const char *unit_path(void) {
+ char *e;
+
+ if ((e = getenv("UNIT_PATH")))
+ if (path_is_absolute(e))
+ return e;
+
+ return UNIT_PATH;
+}
+
+int set_unit_path(const char *p) {
+ char *cwd, *c;
+ int r;
+
+ /* This is mostly for debug purposes */
+
+ if (path_is_absolute(p)) {
+ if (!(c = strdup(p)))
+ return -ENOMEM;
+ } else {
+ if (!(cwd = get_current_dir_name()))
+ return -errno;
+
+ r = asprintf(&c, "%s/%s", cwd, p);
+ free(cwd);
+
+ if (r < 0)
+ return -ENOMEM;
+ }
+
+ if (setenv("UNIT_PATH", c, 0) < 0) {
+ r = -errno;
+ free(c);
+ return r;
+ }
+
+ return 0;
+}
+
+char *unit_name_escape_path(const char *path, const char *suffix) {
+ char *r, *t;
+ const char *f;
+ size_t a, b;
+
+ assert(path);
+ assert(suffix);
+
+ /* Takes a path and a util suffix and makes a nice unit name
+ * of it, escaping all weird chars on the way.
+ *
+ * / becomes _, and all chars not alloweed in a unit name get
+ * escaped as \xFF, including the _ and the \ itself, of
+ * course. This escaping is hence reversible.
+ */
+
+ a = strlen(path);
+ b = strlen(suffix);
+
+ if (!(r = new(char, a*4+b+1)))
+ return NULL;
+
+ for (f = path, t = r; *f; f++) {
+ if (*f == '/')
+ *(t++) = '_';
+ else if (*f == '_' || *f == '\\' || !strchr(VALID_CHARS, *f)) {
+ *(t++) = '\\';
+ *(t++) = 'x';
+ *(t++) = hexchar(*f > 4);
+ *(t++) = hexchar(*f);
+ } else
+ *(t++) = *f;
+ }
+
+ memcpy(t, suffix, b+1);
+
+ return r;
+}