sys_linkat

kernel::abi::linux::riscv64::fs

Function sys_linkat 

Source 
pub fn sys_linkat(abi: &mut LinuxRiscv64Abi, trapframe: &mut Trapframe) -> usize
Expand description

Linux sys_linkat implementation for Scarlet VFS v2

Creates a hard link to an existing file. Both oldpath and newpath can be relative to their respective directory file descriptors.

Arguments:

  • abi: LinuxRiscv64Abi context
  • trapframe: Trapframe containing syscall arguments
    • arg0: olddirfd (old directory file descriptor)
    • arg1: oldpath_ptr (pointer to source path string)
    • arg2: newdirfd (new directory file descriptor)
    • arg3: newpath_ptr (pointer to destination path string)
    • arg4: flags (link flags)

Returns:

  • 0 on success
  • usize::MAX (Linux -1) on error