Function nc::read [−][src]
pub fn read(fd: i32, buf_ptr: usize, count: size_t) -> Result<ssize_t, Errno>
Expand description
Read from a file descriptor.
let path = "/etc/passwd"; let ret = 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 = 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); assert!(nc::close(fd).is_ok());