1 files changed, 8 insertions, 0 deletions
diff --git a/c/gbos.h b/c/gbos.h
index d8c8eb3..fa926fd 100644
--- a/c/gbos.h
+++ b/c/gbos.h
@@ -30,4 +30,12 @@ void          fremove(const char *name);
 #define O_READ  0
 #define O_WRITE 1
 #define NOFD    0xFF
+
+/* process control (c/libc.s) */
+unsigned char fork(void);
+void          exec(unsigned char id);       /* replace image; never returns */
+unsigned char wait(void);
+void          setin(unsigned char fd);      /* redirect stdin  ($FF=console) */
+void          setout(unsigned char fd);     /* redirect stdout ($FF=console) */
+unsigned char lookup(const char *name);     /* command name -> program id    */
 #endif