sys_openat

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

Function sys_openat 

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

Linux sys_openat implementation for Scarlet VFS v2

Opens a file relative to a directory file descriptor (dirfd) and path. If dirfd == AT_FDCWD, uses the current working directory as the base. Otherwise, resolves the base directory from the file descriptor. Uses VfsManager::open_relative for safe and efficient path resolution.

Arguments:

  • abi: LinuxRiscv64Abi context
  • trapframe: Trapframe containing syscall arguments

Returns:

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