1 files changed, 11 insertions, 0 deletions
diff --git a/c/gbos.h b/c/gbos.h
index 47f75ad..d8c8eb3 100644
--- a/c/gbos.h
+++ b/c/gbos.h
@@ -19,4 +19,15 @@ unsigned char atou(const char *s);               /* parse decimal          */
 unsigned char argv_parse(char **argv, unsigned char maxv); /* argc/argv     */
 unsigned char hasflag(char **argv, unsigned char argc, char f);   /* -x flag  */
 char         *optval(char **argv, unsigned char argc, char opt);  /* -x VALUE */
+
+/* filesystem (c/libc.s -> kernel syscalls) */
+unsigned char open(const char *name, unsigned char mode);  /* 0=read 1=write */
+void          close(unsigned char fd);
+int           fgetc(unsigned char fd);          /* a byte, or -1 at EOF */
+void          fputc(unsigned char fd, char ch);
+unsigned char flist(unsigned char slot, char *namebuf); /* 1 if slot used */
+void          fremove(const char *name);
+#define O_READ  0
+#define O_WRITE 1
+#define NOFD    0xFF
 #endif