brainfuck interpreter works!

1 files changed, 20 insertions, 2 deletions

diff --git a/kernel/syscalls.c b/kernel/syscalls.c
index 57ebc54..5205bf1 100644
--- a/kernel/syscalls.c
+++ b/kernel/syscalls.c
@@ -109,7 +109,25 @@ int syscall_gettimeofday(struct timeval *tv, struct timezone *tz)
 
 int syscall_lseek(int file,int ptr,int dir) 
 {
-    kpanic("unhandled syscall: lseek");
+
+#ifndef SEEK_SET
+#define	SEEK_SET	0	/* set file offset to offset */
+#endif
+#ifndef SEEK_CUR
+#define	SEEK_CUR	1	/* set file offset to current plus offset */
+#endif
+#ifndef SEEK_END
+#define	SEEK_END	2	/* set file offset to EOF plus offset */
+#endif
+
+    if(dir==SEEK_CUR)
+    {
+	uint32_t *dat=fds[file].data;
+	dat[1]+=ptr;
+	return dat[1];
+    }
+
+    kpanic("not fully handled lseek! dir=%d",dir);
     return 0;
 }
 
@@ -312,8 +330,8 @@ int syscall_open(char *name, int flags, int mode)
     }
     else
     {
-
 	fds[next_fd]=fd_from_path(name);
+	if(*(uint32_t *)fds[next_fd].data==0)return -1;
     }
 
     next_fd++;