chore: add vendor directory

1 files changed, 90 insertions, 0 deletions

diff --git a/vendor/rustix/src/termios/tty.rs b/vendor/rustix/src/termios/tty.rs
new file mode 100644
index 00000000..000ec8ba
--- /dev/null
+++ b/vendor/rustix/src/termios/tty.rs
@@ -0,0 +1,90 @@
+//! Functions which operate on file descriptors which might be terminals.
+
+use crate::backend;
+#[cfg(feature = "alloc")]
+#[cfg(feature = "fs")]
+#[cfg(not(any(target_os = "fuchsia", target_os = "wasi")))]
+use crate::path::SMALL_PATH_BUFFER_SIZE;
+use backend::fd::AsFd;
+#[cfg(feature = "alloc")]
+#[cfg(not(any(target_os = "fuchsia", target_os = "wasi")))]
+use {crate::ffi::CString, crate::io, alloc::vec::Vec, backend::fd::BorrowedFd};
+
+/// `isatty(fd)`—Tests whether a file descriptor refers to a terminal.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9799919799/functions/isatty.html
+/// [Linux]: https://man7.org/linux/man-pages/man3/isatty.3.html
+#[inline]
+pub fn isatty<Fd: AsFd>(fd: Fd) -> bool {
+    backend::termios::syscalls::isatty(fd.as_fd())
+}
+
+/// `ttyname_r(fd)`—Returns the name of the tty open on `fd`.
+///
+/// If `reuse` already has available capacity, reuse it if possible.
+///
+/// On Linux, this function depends on procfs being mounted on /proc.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9799919799/functions/ttyname.html
+/// [Linux]: https://man7.org/linux/man-pages/man3/ttyname.3.html
+#[cfg(not(any(target_os = "fuchsia", target_os = "wasi")))]
+#[cfg(feature = "alloc")]
+#[cfg(feature = "fs")]
+#[doc(alias = "ttyname_r")]
+#[cfg_attr(docsrs, doc(cfg(feature = "fs")))]
+#[cfg_attr(docsrs, doc(cfg(feature = "alloc")))]
+#[inline]
+pub fn ttyname<Fd: AsFd, B: Into<Vec<u8>>>(fd: Fd, reuse: B) -> io::Result<CString> {
+    _ttyname(fd.as_fd(), reuse.into())
+}
+
+#[cfg(not(any(target_os = "fuchsia", target_os = "wasi")))]
+#[cfg(feature = "alloc")]
+#[cfg(feature = "fs")]
+#[allow(unsafe_code)]
+fn _ttyname(fd: BorrowedFd<'_>, mut buffer: Vec<u8>) -> io::Result<CString> {
+    buffer.clear();
+    buffer.reserve(SMALL_PATH_BUFFER_SIZE);
+
+    loop {
+        match backend::termios::syscalls::ttyname(fd, buffer.spare_capacity_mut()) {
+            Err(io::Errno::RANGE) => {
+                // Use `Vec` reallocation strategy to grow capacity
+                // exponentially.
+                buffer.reserve(buffer.capacity() + 1);
+            }
+            Ok(len) => {
+                // SAFETY: Assume the backend returns the length of the string
+                // excluding the NUL.
+                unsafe {
+                    buffer.set_len(len + 1);
+                }
+
+                // SAFETY:
+                // - “ttyname_r stores this pathname in the buffer buf”
+                // - [POSIX definition 3.271: Pathname]: “A string that is
+                //   used to identify a file.”
+                // - [POSIX definition 3.375: String]: “A contiguous sequence
+                //   of bytes terminated by and including the first null byte.”
+                //
+                // Thus, there will be a single NUL byte at the end of the
+                // string.
+                //
+                // [POSIX definition 3.271: Pathname]: https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/V1_chap03.html#tag_03_271
+                // [POSIX definition 3.375: String]: https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/V1_chap03.html#tag_03_375
+                unsafe {
+                    return Ok(CString::from_vec_with_nul_unchecked(buffer));
+                }
+            }
+            Err(errno) => return Err(errno),
+        }
+    }
+}