1 files changed, 69 insertions, 0 deletions
diff --git a/src/lib/path-util.h b/src/lib/path-util.h
new file mode 100644
index 0000000..8492cf3
--- /dev/null
+++ b/src/lib/path-util.h
@@ -0,0 +1,69 @@
+#ifndef PATH_UTIL_H
+#define PATH_UTIL_H
+
+/* Returns path as the normalized absolute path, which means that './'
+ * and '../' components are resolved, and that duplicate and trailing
+ * slashes are removed. If it's not already the absolute path, it's
+ * assumed to be relative to the current working directory.
+ *
+ * NOTE: Be careful with this function. The resolution of '../' components
+ * with the parent component as if it were a normal directory is not valid
+ * if the path contains symbolic links.
+ *
+ * Returns 0 on success, and -1 on failure. errno and error_r are set on
+ * failure, and error_r cannot be NULL.
+ */
+int t_normpath(const char *path, const char **npath_r, const char **error_r);
+/* Like t_normpath(), but path is relative to given root. */
+int t_normpath_to(const char *path, const char *root, const char **npath_r,
+		  const char **error_r);
+
+/* Returns path as the real normalized absolute path, which means that all
+ * symbolic links in the path are resolved, that './' and '../' components
+ * are resolved, and that duplicate and trailing slashes are removed. If it's
+ * not already the absolute path, it's assumed to be relative to the current
+ * working directory.
+ *
+ * NOTE: This function calls stat() for each path component and more when
+ * there are symbolic links (just like POSIX realpath()).
+ *
+ * Returns 0 on success, and -1 on failure. errno and error_r are set on
+ * failure, and error_r cannot be NULL.
+ */
+int t_realpath(const char *path, const char **npath_r, const char **error_r);
+/* Like t_realpath(), but path is relative to given root. */
+int t_realpath_to(const char *path, const char *root, const char **npath_r,
+		  const char **error_r);
+
+/* Returns path as absolute path. If it's not already absolute path,
+ * it's assumed to be relative to current working directory.
+ *
+ * In the t_abspath functions, the returned paths are not normalized. This
+ * means that './' and '../' are not resolved, but they left in the returned
+ * path as given in the parameters. Symbolic links are not resolved either.
+ *
+ * Returns 0 on success, and -1 on failure. error_r is set on failure, and
+ * cannot be NULL.
+ */
+int t_abspath(const char *path, const char **abspath_r, const char **error_r);
+/* Like t_abspath(), but path is relative to given root. */
+const char *t_abspath_to(const char *path, const char *root);
+
+/* Get current working directory allocated from data stack. Returns 0 on
+ * success and 1 on failure. error_r is set on failure and cannot be NULL. */
+int t_get_working_dir(const char **dir_r, const char **error_r);
+
+/* Get symlink destination allocated from data stack. Returns 0 on success and
+ * -1 on failure. error_r is set on failure and cannot be NULL. */
+int t_readlink(const char *path, const char **dest_r, const char **error_r);
+
+/* Update binpath to be absolute:
+ * a) begins with '/' -> no change
+ * b) contains '/' -> assume relative to working directory
+ * c) set to first executable that's found from $PATH
+ *
+ * error_r is set on failure, and cannot be NULL.
+ */
+bool t_binary_abspath(const char **binpath, const char **error_r);
+
+#endif