[FS, USER] Debug filesystem, fs syscalls

libc/file_io.c

@@ -4,18 +4,48 @@
 #include <unistd.h>
 #include <sys/uio.h>
 
-SYSCALL_DEF(ioctl)
-{
-  SYSCALL_INIT(int, fd, unsigned long, request);
 
-  if(fd == 1 && request == TIOCGWINSZ)
-  {
-    return 0;
-  }
-  kernel_debug("==> IOCTL - unsupported request:%lx\n", request);
-  return -1;
+SYSCALL_DEF(open)
+{
+  SYSCALL_INIT(char *, path, int, flags, int, mode);
+  return kernel_syscall(SYS_OPEN, path, flags, mode);
+}
+SYSCALL_DEF(close)
+{
+  SYSCALL_INIT(int, fd);
+  return kernel_syscall(SYS_CLOSE, fd);
+}
+SYSCALL_DEF(read)
+{
+  SYSCALL_INIT(int, fd, void *, buffer, size_t, nbyte);
+
+  return kernel_syscall(SYS_READ, fd, buffer, nbyte);
+}
+SYSCALL_DEF(write)
+{
+  SYSCALL_INIT(int, fd, void *, buffer, size_t, nbyte);
+
+  return kernel_syscall(SYS_WRITE, fd, buffer, nbyte);
+}
+SYSCALL_DEF(lseek)
+{
+  SYSCALL_INIT(int, fd, long, offset, int, whence);
+  return kernel_syscall(SYS_SEEK, fd, offset, whence);
 }
 
+SYSCALL_DEF(readv)
+{
+  SYSCALL_INIT(int, fd, const struct iovec *, iov, int, iovcnt);
+
+  size_t len = 0;
+
+  for(int i=0; i < iovcnt; i++)
+  {
+    len += read(fd, iov[i].iov_base, iov[i].iov_len);
+  }
+
+  return (long)len;
+}
 SYSCALL_DEF(writev)
 {
   SYSCALL_INIT(int, fd, const struct iovec *, iov, int, iovcnt);
@@ -29,10 +59,13 @@ SYSCALL_DEF(writev)
 
   return (long)len;
 }
-
-SYSCALL_DEF(write)
+SYSCALL_DEF(ioctl)
 {
-  SYSCALL_INIT(int, fd, void *, buffer, size_t, nbyte);
+  SYSCALL_INIT(int, fd, unsigned long, request);
 
-  return kernel_syscall(SYS_WRITE, fd, buffer, nbyte);
+  if(request == TIOCGWINSZ)
+    return !kernel_syscall(SYS_ISATTY, fd);
+
+  kernel_debug("==> IOCTL - unsupported request:%lx\n", request);
+  return -1;
 }

libc/syscall_num.h

@@ -1,8 +1,16 @@
 #pragma once
 
-#define SYS_WRITE 0x001
-#define SYS_BRK   0x002
-#define SYS_FORK  0x003
-#define SYS_EXIT  0x004
-#define SYS_WAIT  0x005
-#define SYS_DEBUG 0x3FF
+#define SYS_DEBUG  0x3FF
+
+#define SYS_OPEN   0x001
+#define SYS_CLOSE  0x002
+#define SYS_READ   0x003
+#define SYS_WRITE  0x004
+#define SYS_ISATTY 0x005
+#define SYS_SEEK   0x006
+
+#define SYS_BRK   0x007
+
+#define SYS_FORK  0x008
+#define SYS_EXIT  0x009
+#define SYS_WAIT  0x00A