-GBool openTempFile(GString **name, FILE **f, char *mode, char *ext);
+extern GBool openTempFile(GString **name, FILE **f, char *mode, char *ext);
+
+// Execute <command>. Returns true on success.
+extern GBool executeCommand(char *cmd);
+
+// Just like fgets, but handles Unix, Mac, and/or DOS end-of-line
+// conventions.
+extern char *getLine(char *buf, int size, FILE *f);