includes: small fixes and additions to help compiling programs.

include/minix/paths.h

@@ -14,7 +14,9 @@
 
 #define    _PATH_DEFTAPE   "/dev/sa0"
 #define    _PATH_RAMDISK   "/dev/ram"
+#define    _PATH_TTY       "/dev/tty"
 #define    _PATH_TMP       "/tmp"
+#define    _PATH_DEVNULL   "/dev/null"
 
 #define _PATH_BSHELL	"/bin/sh"
 #define _PATH_SERVICE	"/bin/service"

include/minix/types.h

@@ -103,6 +103,7 @@ typedef short          uid_t;	   /* user id */
 
 /* Signal handler type, e.g. SIG_IGN */
 typedef void _PROTOTYPE( (*sighandler_t), (int) );
+typedef sighandler_t sig_t;
 
 /* Compatibility with other systems */
 typedef unsigned char	u_char;