Merging upstream version 1.70.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 129 insertions, 0 deletions

diff --git a/vendor/rustix-0.36.5/src/process/wait.rs b/vendor/rustix-0.36.5/src/process/wait.rs
new file mode 100644
index 000000000..a4bd1b528
--- /dev/null
+++ b/vendor/rustix-0.36.5/src/process/wait.rs
@@ -0,0 +1,129 @@
+use crate::process::Pid;
+use crate::{backend, io};
+use bitflags::bitflags;
+
+bitflags! {
+    /// Options for modifying the behavior of wait/waitpid
+    pub struct WaitOptions: u32 {
+        /// Return immediately if no child has exited.
+        const NOHANG = backend::process::wait::WNOHANG as _;
+        /// Return if a child has stopped (but not traced via `ptrace(2)`)
+        const UNTRACED = backend::process::wait::WUNTRACED as _;
+        /// Return if a stopped child has been resumed by delivery of `SIGCONT`
+        const CONTINUED = backend::process::wait::WCONTINUED as _;
+    }
+}
+
+/// the status of the child processes the caller waited on
+#[derive(Debug, Clone, Copy)]
+pub struct WaitStatus(u32);
+
+impl WaitStatus {
+    /// create a `WaitStatus` out of an integer.
+    #[inline]
+    pub(crate) fn new(status: u32) -> Self {
+        Self(status)
+    }
+
+    /// Converts a `WaitStatus` into its raw representation as an integer.
+    #[inline]
+    pub const fn as_raw(self) -> u32 {
+        self.0
+    }
+
+    /// Returns whether the process is currently stopped.
+    #[inline]
+    pub fn stopped(self) -> bool {
+        backend::process::wait::WIFSTOPPED(self.0 as _)
+    }
+
+    /// Returns whether the process has continued from a job control stop.
+    #[inline]
+    pub fn continued(self) -> bool {
+        backend::process::wait::WIFCONTINUED(self.0 as _)
+    }
+
+    /// Returns the number of the signal that stopped the process,
+    /// if the process was stopped by a signal.
+    #[inline]
+    pub fn stopping_signal(self) -> Option<u32> {
+        if self.stopped() {
+            Some(backend::process::wait::WSTOPSIG(self.0 as _) as _)
+        } else {
+            None
+        }
+    }
+
+    /// Returns the exit status number returned by the process,
+    /// if it exited normally.
+    #[inline]
+    pub fn exit_status(self) -> Option<u32> {
+        if backend::process::wait::WIFEXITED(self.0 as _) {
+            Some(backend::process::wait::WEXITSTATUS(self.0 as _) as _)
+        } else {
+            None
+        }
+    }
+
+    /// Returns the number of the signal that terminated the process,
+    /// if the process was terminated by a signal.
+    #[inline]
+    pub fn terminating_signal(self) -> Option<u32> {
+        if backend::process::wait::WIFSIGNALED(self.0 as _) {
+            Some(backend::process::wait::WTERMSIG(self.0 as _) as _)
+        } else {
+            None
+        }
+    }
+}
+
+/// `waitpid(pid, waitopts)`—Wait for a specific process to change state.
+///
+/// If the pid is `None`, the call will wait for any child process whose
+/// process group id matches that of the calling process.
+///
+/// If the pid is equal to `RawPid::MAX`, the call will wait for any child
+/// process.
+///
+/// Otherwise if the `wrapping_neg` of pid is less than pid, the call will wait
+/// for any child process with a group ID equal to the `wrapping_neg` of `pid`.
+///
+/// Otherwise, the call will wait for the child process with the given pid.
+///
+/// On Success, returns the status of the selected process.
+///
+/// If `NOHANG` was specified in the options, and the selected child process
+/// didn't change state, returns `None`.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/wait.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/waitpid.2.html
+#[cfg(not(target_os = "wasi"))]
+#[inline]
+pub fn waitpid(pid: Option<Pid>, waitopts: WaitOptions) -> io::Result<Option<WaitStatus>> {
+    Ok(backend::process::syscalls::waitpid(pid, waitopts)?.map(|(_, status)| status))
+}
+
+/// `wait(waitopts)`—Wait for any of the children of calling process to
+/// change state.
+///
+/// On success, returns the pid of the child process whose state changed, and
+/// the status of said process.
+///
+/// If `NOHANG` was specified in the options, and the selected child process
+/// didn't change state, returns `None`.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/wait.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/waitpid.2.html
+#[cfg(not(target_os = "wasi"))]
+#[inline]
+pub fn wait(waitopts: WaitOptions) -> io::Result<Option<(Pid, WaitStatus)>> {
+    backend::process::syscalls::wait(waitopts)
+}