X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=KernelLand%2FKernel%2Fsyscalls.c;h=0348d57ada02980199fe27f2a9df79bf9fc79da2;hb=e7809e57b0692cf65ee1a7d2060c52fc53da49f2;hp=d629ae4e8e16fb215b24211cb9921b24355c4990;hpb=bd5e8623e509a443d7d6e1b959b79f85b0c285b7;p=tpg%2Facess2.git

diff --git a/KernelLand/Kernel/syscalls.c b/KernelLand/Kernel/syscalls.c
index d629ae4e..0348d57a 100644
--- a/KernelLand/Kernel/syscalls.c
+++ b/KernelLand/Kernel/syscalls.c
@@ -275,21 +275,35 @@ void SyscallHandler(tSyscallRegs *Regs)
 			ret = -1;
 			break;
 		}
-		// Sanity check the paths
-		if(!Syscall_ValidString((char*)Regs->Arg1)
-		|| !Syscall_ValidString((char*)Regs->Arg2)
-		|| !Syscall_ValidString((char*)Regs->Arg3)
-		|| !Syscall_ValidString((char*)Regs->Arg4) ) {
-			err = -EINVAL;
-			ret = -1;
-			break;
+		
+		if( !Regs->Arg1 )
+		{
+			if( !Syscall_ValidString((char*)Regs->Arg2) ) {
+				err = -EINVAL;
+				ret = -1;
+				break;
+			}
+			
+			ret = VFS_Unmount((char*)Regs->Arg2);
+		}
+		else
+		{
+			// Sanity check the paths
+			if(!Syscall_ValidString((char*)Regs->Arg1)
+			|| !Syscall_ValidString((char*)Regs->Arg2)
+			|| (Regs->Arg3 && !Syscall_ValidString((char*)Regs->Arg3))
+			|| !Syscall_ValidString((char*)Regs->Arg4) ) {
+				err = -EINVAL;
+				ret = -1;
+				break;
+			}
+			ret = VFS_Mount(
+				(char*)Regs->Arg1,	// Device
+				(char*)Regs->Arg2,	// Mount point
+				(char*)Regs->Arg3,	// Filesystem
+				(char*)Regs->Arg4	// Options
+				);
 		}
-		ret = VFS_Mount(
-			(char*)Regs->Arg1,	// Device
-			(char*)Regs->Arg2,	// Mount point
-			(char*)Regs->Arg3,	// Filesystem
-			(char*)Regs->Arg4	// Options
-			);
 		break;
 		
 	// Wait on a set of handles