Function nc::read

pub unsafe fn read(
    fd: i32,
    buf_ptr: usize,
    count: size_t
) -> Result<ssize_t, Errno>

Read from a file descriptor.

Example

let path = "/etc/passwd";
let ret = unsafe { nc::openat(nc::AT_FDCWD, path, nc::O_RDONLY, 0) };
assert!(ret.is_ok());
let fd = ret.unwrap();
let mut buf = [0_u8; 4 * 1024];
let ret = unsafe { nc::read(fd, buf.as_mut_ptr() as usize, buf.len()) };
assert!(ret.is_ok());
let n_read = ret.unwrap();
assert!(n_read <= buf.len() as nc::ssize_t);
let ret = unsafe { nc::close(fd) };
assert!(ret.is_ok());