1 files changed, 159 insertions, 0 deletions
diff --git a/vendor/rustix/src/imp/libc/termios/syscalls.rs b/vendor/rustix/src/imp/libc/termios/syscalls.rs
new file mode 100644
index 000000000..91b01b4a1
--- /dev/null
+++ b/vendor/rustix/src/imp/libc/termios/syscalls.rs
@@ -0,0 +1,159 @@
+//! libc syscalls supporting `rustix::termios`.
+//!
+//! # Safety
+//!
+//! See the `rustix::imp::syscalls` module documentation for details.
+
+#![allow(unsafe_code)]
+
+use super::super::c;
+use super::super::conv::{borrowed_fd, ret, ret_pid_t};
+use crate::fd::BorrowedFd;
+#[cfg(feature = "procfs")]
+#[cfg(not(any(target_os = "fuchsia", target_os = "wasi")))]
+use crate::ffi::CStr;
+use crate::io;
+use crate::process::{Pid, RawNonZeroPid};
+use crate::termios::{Action, OptionalActions, QueueSelector, Speed, Termios, Winsize};
+use core::mem::MaybeUninit;
+use libc_errno::errno;
+
+pub(crate) fn tcgetattr(fd: BorrowedFd<'_>) -> io::Result<Termios> {
+    let mut result = MaybeUninit::<Termios>::uninit();
+    unsafe {
+        ret(c::tcgetattr(borrowed_fd(fd), result.as_mut_ptr())).map(|()| result.assume_init())
+    }
+}
+
+pub(crate) fn tcgetpgrp(fd: BorrowedFd<'_>) -> io::Result<Pid> {
+    unsafe {
+        let pid = ret_pid_t(c::tcgetpgrp(borrowed_fd(fd)))?;
+        debug_assert_ne!(pid, 0);
+        Ok(Pid::from_raw_nonzero(RawNonZeroPid::new_unchecked(pid)))
+    }
+}
+
+pub(crate) fn tcsetpgrp(fd: BorrowedFd<'_>, pid: Pid) -> io::Result<()> {
+    unsafe { ret(c::tcsetpgrp(borrowed_fd(fd), pid.as_raw_nonzero().get())) }
+}
+
+pub(crate) fn tcsetattr(
+    fd: BorrowedFd,
+    optional_actions: OptionalActions,
+    termios: &Termios,
+) -> io::Result<()> {
+    unsafe {
+        ret(c::tcsetattr(
+            borrowed_fd(fd),
+            optional_actions as _,
+            termios,
+        ))
+    }
+}
+
+pub(crate) fn tcsendbreak(fd: BorrowedFd) -> io::Result<()> {
+    unsafe { ret(c::tcsendbreak(borrowed_fd(fd), 0)) }
+}
+
+pub(crate) fn tcdrain(fd: BorrowedFd) -> io::Result<()> {
+    unsafe { ret(c::tcdrain(borrowed_fd(fd))) }
+}
+
+pub(crate) fn tcflush(fd: BorrowedFd, queue_selector: QueueSelector) -> io::Result<()> {
+    unsafe { ret(c::tcflush(borrowed_fd(fd), queue_selector as _)) }
+}
+
+pub(crate) fn tcflow(fd: BorrowedFd, action: Action) -> io::Result<()> {
+    unsafe { ret(c::tcflow(borrowed_fd(fd), action as _)) }
+}
+
+pub(crate) fn tcgetsid(fd: BorrowedFd) -> io::Result<Pid> {
+    unsafe {
+        let pid = ret_pid_t(c::tcgetsid(borrowed_fd(fd)))?;
+        debug_assert_ne!(pid, 0);
+        Ok(Pid::from_raw_nonzero(RawNonZeroPid::new_unchecked(pid)))
+    }
+}
+
+pub(crate) fn tcsetwinsize(fd: BorrowedFd, winsize: Winsize) -> io::Result<()> {
+    unsafe { ret(c::ioctl(borrowed_fd(fd), c::TIOCSWINSZ, &winsize)) }
+}
+
+pub(crate) fn tcgetwinsize(fd: BorrowedFd) -> io::Result<Winsize> {
+    unsafe {
+        let mut buf = MaybeUninit::<Winsize>::uninit();
+        ret(c::ioctl(
+            borrowed_fd(fd),
+            c::TIOCGWINSZ.into(),
+            buf.as_mut_ptr(),
+        ))?;
+        Ok(buf.assume_init())
+    }
+}
+
+#[inline]
+#[must_use]
+pub(crate) fn cfgetospeed(termios: &Termios) -> Speed {
+    unsafe { c::cfgetospeed(termios) }
+}
+
+#[inline]
+#[must_use]
+pub(crate) fn cfgetispeed(termios: &Termios) -> Speed {
+    unsafe { c::cfgetispeed(termios) }
+}
+
+#[inline]
+pub(crate) fn cfmakeraw(termios: &mut Termios) {
+    unsafe { c::cfmakeraw(termios) }
+}
+
+#[inline]
+pub(crate) fn cfsetospeed(termios: &mut Termios, speed: Speed) -> io::Result<()> {
+    unsafe { ret(c::cfsetospeed(termios, speed)) }
+}
+
+#[inline]
+pub(crate) fn cfsetispeed(termios: &mut Termios, speed: Speed) -> io::Result<()> {
+    unsafe { ret(c::cfsetispeed(termios, speed)) }
+}
+
+#[inline]
+pub(crate) fn cfsetspeed(termios: &mut Termios, speed: Speed) -> io::Result<()> {
+    unsafe { ret(c::cfsetspeed(termios, speed)) }
+}
+
+pub(crate) fn isatty(fd: BorrowedFd<'_>) -> bool {
+    let res = unsafe { c::isatty(borrowed_fd(fd)) };
+    if res == 0 {
+        match errno().0 {
+            #[cfg(not(any(target_os = "android", target_os = "linux")))]
+            c::ENOTTY => false,
+
+            // Old Linux versions reportedly return `EINVAL`.
+            // <https://man7.org/linux/man-pages/man3/isatty.3.html#ERRORS>
+            #[cfg(any(target_os = "android", target_os = "linux"))]
+            c::ENOTTY | c::EINVAL => false,
+
+            // Darwin mysteriously returns `EOPNOTSUPP` sometimes.
+            #[cfg(any(target_os = "ios", target_os = "macos"))]
+            c::EOPNOTSUPP => false,
+
+            err => panic!("unexpected error from isatty: {:?}", err),
+        }
+    } else {
+        true
+    }
+}
+
+#[cfg(feature = "procfs")]
+#[cfg(not(any(target_os = "fuchsia", target_os = "wasi")))]
+pub(crate) fn ttyname(dirfd: BorrowedFd<'_>, buf: &mut [u8]) -> io::Result<usize> {
+    unsafe {
+        // `ttyname_r` returns its error status rather than using `errno`.
+        match c::ttyname_r(borrowed_fd(dirfd), buf.as_mut_ptr().cast(), buf.len()) {
+            0 => Ok(CStr::from_ptr(buf.as_ptr().cast()).to_bytes().len()),
+            err => Err(io::Errno::from_raw_os_error(err)),
+        }
+    }
+}