1 files changed, 97 insertions, 0 deletions
diff --git a/vendor/rustix/src/process/chdir.rs b/vendor/rustix/src/process/chdir.rs
new file mode 100644
index 0000000..a68352f
--- /dev/null
+++ b/vendor/rustix/src/process/chdir.rs
@@ -0,0 +1,97 @@
+#[cfg(not(target_os = "fuchsia"))]
+use crate::backend::fd::AsFd;
+#[cfg(feature = "fs")]
+use crate::path;
+#[cfg(any(feature = "fs", not(target_os = "fuchsia")))]
+use crate::{backend, io};
+#[cfg(all(feature = "alloc", feature = "fs"))]
+use {
+    crate::ffi::{CStr, CString},
+    crate::path::SMALL_PATH_BUFFER_SIZE,
+    alloc::vec::Vec,
+};
+
+/// `chdir(path)`—Change the current working directory.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/chdir.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/chdir.2.html
+#[inline]
+#[cfg(feature = "fs")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "fs")))]
+pub fn chdir<P: path::Arg>(path: P) -> io::Result<()> {
+    path.into_with_c_str(backend::process::syscalls::chdir)
+}
+
+/// `fchdir(fd)`—Change the current working directory.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/fchdir.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/fchdir.2.html
+#[cfg(not(target_os = "fuchsia"))]
+#[inline]
+pub fn fchdir<Fd: AsFd>(fd: Fd) -> io::Result<()> {
+    backend::process::syscalls::fchdir(fd.as_fd())
+}
+
+/// `getCWD`—Return the current working directory.
+///
+/// If `reuse` already has available capacity, reuse it if possible.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getcwd.html
+/// [Linux]: https://man7.org/linux/man-pages/man3/getcwd.3.html
+#[cfg(all(feature = "alloc", feature = "fs"))]
+#[cfg(not(target_os = "wasi"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "fs")))]
+#[inline]
+pub fn getcwd<B: Into<Vec<u8>>>(reuse: B) -> io::Result<CString> {
+    _getcwd(reuse.into())
+}
+
+#[cfg(all(feature = "alloc", feature = "fs"))]
+#[allow(unsafe_code)]
+fn _getcwd(mut buffer: Vec<u8>) -> io::Result<CString> {
+    buffer.clear();
+    buffer.reserve(SMALL_PATH_BUFFER_SIZE);
+
+    loop {
+        match backend::process::syscalls::getcwd(buffer.spare_capacity_mut()) {
+            Err(io::Errno::RANGE) => {
+                // Use `Vec` reallocation strategy to grow capacity
+                // exponentially.
+                buffer.reserve(buffer.capacity() + 1);
+            }
+            Ok(_) => {
+                // SAFETY:
+                // - "These functions return a null-terminated string"
+                // - [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 3.375: String]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_375
+                unsafe {
+                    buffer.set_len(
+                        CStr::from_ptr(buffer.as_ptr().cast())
+                            .to_bytes_with_nul()
+                            .len(),
+                    );
+
+                    return Ok(CString::from_vec_with_nul_unchecked(buffer));
+                }
+            }
+            Err(errno) => return Err(errno),
+        }
+    }
+}