sys_read

microfetch_lib::syscall

Function sys_read 

Source 
pub unsafe fn sys_read(fd: i32, buf: *mut u8, count: usize) -> isize
Expand description

Direct syscall to read from a file descriptor

§Returns n

Number of bytes read or -1 on error

§Safety

The caller must ensure:

  • buf points to a valid writable buffer of at least count bytes
  • fd is a valid open file descriptor