*: moving files

1 files changed, 32 insertions, 0 deletions

diff --git a/src/kernel/syscalls.c b/src/kernel/syscalls.c
index 3fc09fa..23a8883 100644
--- a/src/kernel/syscalls.c
+++ b/src/kernel/syscalls.c
@@ -456,6 +456,37 @@ hid_t _sys_getnull(int flags) {
 	SYSCALL_RETURN((0 <= hid) ? hid : -EMFILE);
 }
 
+long _sys_duplex(hid_t from, hid_t to, int flags) {
+	if ((flags & ~DUPLEX_REMOVE) != 0) {
+		SYSCALL_RETURN(-ENOSYS);
+	}
+
+	Handle *fromh = hs_get(proc_cur->hs, from);
+	Handle *toh   = hs_get(proc_cur->hs, to);
+	if (fromh == NULL || toh == NULL) {
+		SYSCALL_RETURN(-EBADF);
+	}
+	if (fromh->type != HANDLE_FILE || toh->type != HANDLE_FILE) {
+		SYSCALL_RETURN(-ENOSYS);
+	}
+	if (fromh->backend != toh->backend) {
+		SYSCALL_RETURN(-ENOSYS);
+	}
+	if (!fromh->readable || !fromh->writeable || !toh->writeable) {
+		SYSCALL_RETURN(-EACCES);
+	}
+
+	vfsreq_dispatchcopy((VfsReq) {
+		.type = VFSOP_DUPLEX,
+		.id = fromh->file_id,
+		.id2 = toh->file_id,
+		.flags = flags,
+		.caller = proc_cur,
+		.backend = fromh->backend,
+	});
+	return -1; // dummy
+}
+
 long _sys_execbuf(void __user *ubuf, size_t len) {
 	if (len == 0) SYSCALL_RETURN(0);
 	static_assert(EXECBUF_MAX_LEN <= KMALLOC_MAX);
@@ -512,6 +543,7 @@ long _syscall(long num, long a, long b, long c, long d, long e) {
 		break; case _SYS_GETPROCFS:	_sys_getprocfs(a);
 		break; case _SYS_TIME:	_sys_time(a);
 		break; case _SYS_GETNULL:	_sys_getnull(a);
+		break; case _SYS_DUPLEX:	_sys_duplex(a, b, c);
 		break; case _SYS_EXECBUF:	_sys_execbuf((userptr_t)a, b);
 		break; case _SYS_DEBUG_KLOG:	_sys_debug_klog((userptr_t)a, b);
 		break;