mercurial: rust/chg/src/procutil.rs@ba447b83cd56 (annotated)

39970 a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	1	// Copyright 2018 Yuya Nishihara <yuya@tcha.org>
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	2	//
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	3	// This software may be used and distributed according to the terms of the
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	4	// GNU General Public License version 2 or any later version.
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	5
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	6	//! Low-level utility for signal and process handling.
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	7
39973 ba447b83cd56 rust-chg: add low-level function to set pager fd blocking Yuya Nishihara <yuya@tcha.org> parents: 39970 diff changeset	8	use libc::{self, c_int, size_t, ssize_t};
39970 a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	9	use std::io;
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	10	use std::os::unix::io::RawFd;
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	11
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	12	#[link(name = "procutil", kind = "static")]
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	13	extern "C" {
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	14	// sendfds.c
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	15	fn sendfds(sockfd: c_int, fds: *const c_int, fdlen: size_t) -> ssize_t;
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	16	}
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	17
39973 ba447b83cd56 rust-chg: add low-level function to set pager fd blocking Yuya Nishihara <yuya@tcha.org> parents: 39970 diff changeset	18	/// Changes the given fd to blocking mode.
ba447b83cd56 rust-chg: add low-level function to set pager fd blocking Yuya Nishihara <yuya@tcha.org> parents: 39970 diff changeset	19	pub fn set_blocking_fd(fd: RawFd) -> io::Result<()> {
ba447b83cd56 rust-chg: add low-level function to set pager fd blocking Yuya Nishihara <yuya@tcha.org> parents: 39970 diff changeset	20	let flags = unsafe { libc::fcntl(fd, libc::F_GETFL) };
ba447b83cd56 rust-chg: add low-level function to set pager fd blocking Yuya Nishihara <yuya@tcha.org> parents: 39970 diff changeset	21	if flags < 0 {
ba447b83cd56 rust-chg: add low-level function to set pager fd blocking Yuya Nishihara <yuya@tcha.org> parents: 39970 diff changeset	22	return Err(io::Error::last_os_error());
ba447b83cd56 rust-chg: add low-level function to set pager fd blocking Yuya Nishihara <yuya@tcha.org> parents: 39970 diff changeset	23	}
ba447b83cd56 rust-chg: add low-level function to set pager fd blocking Yuya Nishihara <yuya@tcha.org> parents: 39970 diff changeset	24	let r = unsafe { libc::fcntl(fd, libc::F_SETFL, flags & !libc::O_NONBLOCK) };
ba447b83cd56 rust-chg: add low-level function to set pager fd blocking Yuya Nishihara <yuya@tcha.org> parents: 39970 diff changeset	25	if r < 0 {
ba447b83cd56 rust-chg: add low-level function to set pager fd blocking Yuya Nishihara <yuya@tcha.org> parents: 39970 diff changeset	26	return Err(io::Error::last_os_error())
ba447b83cd56 rust-chg: add low-level function to set pager fd blocking Yuya Nishihara <yuya@tcha.org> parents: 39970 diff changeset	27	}
ba447b83cd56 rust-chg: add low-level function to set pager fd blocking Yuya Nishihara <yuya@tcha.org> parents: 39970 diff changeset	28	Ok(())
ba447b83cd56 rust-chg: add low-level function to set pager fd blocking Yuya Nishihara <yuya@tcha.org> parents: 39970 diff changeset	29	}
ba447b83cd56 rust-chg: add low-level function to set pager fd blocking Yuya Nishihara <yuya@tcha.org> parents: 39970 diff changeset	30
39970 a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	31	/// Sends file descriptors via the given socket.
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	32	pub fn send_raw_fds(sock_fd: RawFd, fds: &[RawFd]) -> io::Result<()> {
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	33	let r = unsafe { sendfds(sock_fd, fds.as_ptr(), fds.len() as size_t) };
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	34	if r < 0 {
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	35	return Err(io::Error::last_os_error());
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	36	}
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	37	Ok(())
a8be2cff613f rust-chg: add wrapper around C function Yuya Nishihara <yuya@tcha.org> parents: diff changeset	38	}

author	Yuya Nishihara <yuya@tcha.org>
	Sat, 29 Sep 2018 21:59:07 +0900
changeset 39973	ba447b83cd56
parent 39970	a8be2cff613f
child 39976	44840bcc411a
permissions	-rw-r--r--