char** path_strv_resolve(char **l, const char *prefix);
char** path_strv_resolve_uniq(char **l, const char *prefix);
-int path_is_mount_point(const char *path, bool allow_symlink);
+int fd_is_mount_point(int fd, const char *filename, int flags);
+int path_is_mount_point(const char *path, int flags);
int path_is_read_only_fs(const char *path);
int path_is_os_tree(const char *path);
/* Same as PATH_FOREACH_PREFIX but also includes the specified path itself */
#define PATH_FOREACH_PREFIX_MORE(prefix, path) \
for (char *_slash = ({ path_kill_slashes(strcpy(prefix, path)); if (streq(prefix, "/")) prefix[0] = 0; strrchr(prefix, 0); }); _slash && ((*_slash = 0), true); _slash = strrchr((prefix), '/'))
+
+char *prefix_root(const char *root, const char *path);
+
+/* Similar to prefix_root(), but returns an alloca() buffer, or
+ * possibly a const pointer into the path parameter */
+#define prefix_roota(root, path) \
+ ({ \
+ const char* _path = (path), *_root = (root), *_ret; \
+ char *_p, *_n; \
+ size_t _l; \
+ while (_path[0] == '/' && _path[1] == '/') \
+ _path ++; \
+ if (isempty(_root) || path_equal(_root, "/")) \
+ _ret = _path; \
+ else { \
+ _l = strlen(_root) + 1 + strlen(_path) + 1; \
+ _n = alloca(_l); \
+ _p = stpcpy(_n, _root); \
+ while (_p > _n && _p[-1] == '/') \
+ _p--; \
+ if (_path[0] != '/') \
+ *(_p++) = '/'; \
+ strcpy(_p, _path); \
+ _ret = _n; \
+ } \
+ _ret; \
+ })