sourceturner
60 lines
1.3 KiB
Rust
60 lines
1.3 KiB
Rust
// TODO: set this for entire crate when possible
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#![deny(unsafe_op_in_unsafe_fn)]
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use crate::{
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header::{fcntl, sys_ioctl, unistd},
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io::{Cursor, Write},
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platform::types::{c_char, c_int, c_void},
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};
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pub(super) unsafe fn openpty(name: &mut [u8]) -> Result<(c_int, c_int), ()> {
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//TODO: wrap in auto-close struct
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let master = unsafe { fcntl::open(c"/dev/ptmx".as_ptr(), fcntl::O_RDWR | fcntl::O_NOCTTY, 0) };
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if master < 0 {
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return Err(());
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}
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let mut lock: c_int = 0;
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if unsafe {
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sys_ioctl::ioctl(
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master,
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sys_ioctl::TIOCSPTLCK,
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&mut lock as *mut c_int as *mut c_void,
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)
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} != 0
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{
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unistd::close(master);
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return Err(());
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}
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let mut ptn: c_int = 0;
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if unsafe {
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sys_ioctl::ioctl(
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master,
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sys_ioctl::TIOCGPTN,
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&mut ptn as *mut c_int as *mut c_void,
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)
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} != 0
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{
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unistd::close(master);
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return Err(());
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}
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let mut cursor = Cursor::new(name);
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write!(cursor, "/dev/pts/{}\0", ptn);
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let slave = unsafe {
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fcntl::open(
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cursor.get_ref().as_ptr() as *const c_char,
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fcntl::O_RDWR | fcntl::O_NOCTTY,
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0,
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)
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};
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if slave < 0 {
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unistd::close(master);
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return Err(());
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}
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Ok((master, slave))
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}
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