more cleaning

libshell/libshell.h

@@ -0,0 +1,11 @@
+#include <errno.h>
+#include <stdlib.h> /* getenv(3), malloc(3) */
+#include <string.h> /* memcpy(3) */
+
+/* For the shell variable $PATH */
+#define PATH_NAME "PATH"
+#define PATH_DELIMITER ':'
+
+/* Returns a list of the current paths ordered from first to last priority.
+ * output must be freed and *output must be freed! */
+char **getpaths(void);