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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
commita990de90fe41456a23e58bd087d2f107d321f3a1 (patch)
tree15afc392522a9e85dc3332235e311b7d39352ea9 /vendor/rustix/src/system.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
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-//! Uname and other system-level functions.
-//!
-//! # Safety
-//!
-//! This function converts from `struct utsname` fields provided from the
-//! kernel into `&str` references, which assumes that they're NUL-terminated.
-#![allow(unsafe_code)]
-
-use crate::backend;
-#[cfg(target_os = "linux")]
-use crate::backend::c;
-use crate::ffi::CStr;
-#[cfg(not(any(target_os = "espidf", target_os = "emscripten", target_os = "vita")))]
-use crate::io;
-use core::fmt;
-
-#[cfg(linux_kernel)]
-pub use backend::system::types::Sysinfo;
-
-/// `uname()`—Returns high-level information about the runtime OS and
-/// hardware.
-///
-/// For `gethostname()`, use [`Uname::nodename`] on the result.
-///
-/// # References
-/// - [POSIX]
-/// - [Linux]
-/// - [Apple]
-/// - [NetBSD]
-/// - [FreeBSD]
-/// - [OpenBSD]
-/// - [DragonFly BSD]
-/// - [illumos]
-/// - [glibc]
-///
-/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/uname.html
-/// [Linux]: https://man7.org/linux/man-pages/man2/uname.2.html
-/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man3/uname.3.html
-/// [NetBSD]: https://man.netbsd.org/uname.3
-/// [FreeBSD]: https://man.freebsd.org/cgi/man.cgi?query=uname&sektion=3
-/// [OpenBSD]: https://man.openbsd.org/uname.3
-/// [DragonFly BSD]: https://man.dragonflybsd.org/?command=uname&section=3
-/// [illumos]: https://illumos.org/man/2/uname
-/// [glibc]: https://www.gnu.org/software/libc/manual/html_node/Platform-Type.html
-#[doc(alias = "gethostname")]
-#[inline]
-pub fn uname() -> Uname {
- Uname(backend::system::syscalls::uname())
-}
-
-/// `struct utsname`—Return type for [`uname`].
-#[doc(alias = "utsname")]
-pub struct Uname(backend::system::types::RawUname);
-
-impl Uname {
- /// `sysname`—Operating system release name
- #[inline]
- pub fn sysname(&self) -> &CStr {
- Self::to_cstr(self.0.sysname.as_ptr().cast())
- }
-
- /// `nodename`—Name with vague meaning
- ///
- /// This is intended to be a network name, however it's unable to convey
- /// information about hosts that have multiple names, or any information
- /// about where the names are visible.
- ///
- /// This corresponds to the `gethostname` value.
- #[inline]
- pub fn nodename(&self) -> &CStr {
- Self::to_cstr(self.0.nodename.as_ptr().cast())
- }
-
- /// `release`—Operating system release version string
- #[inline]
- pub fn release(&self) -> &CStr {
- Self::to_cstr(self.0.release.as_ptr().cast())
- }
-
- /// `version`—Operating system build identifiers
- #[inline]
- pub fn version(&self) -> &CStr {
- Self::to_cstr(self.0.version.as_ptr().cast())
- }
-
- /// `machine`—Hardware architecture identifier
- #[inline]
- pub fn machine(&self) -> &CStr {
- Self::to_cstr(self.0.machine.as_ptr().cast())
- }
-
- /// `domainname`—NIS or YP domain identifier
- #[cfg(linux_kernel)]
- #[inline]
- pub fn domainname(&self) -> &CStr {
- Self::to_cstr(self.0.domainname.as_ptr().cast())
- }
-
- #[inline]
- fn to_cstr<'a>(ptr: *const u8) -> &'a CStr {
- // SAFETY: Strings returned from the kernel are always NUL-terminated.
- unsafe { CStr::from_ptr(ptr.cast()) }
- }
-}
-
-impl fmt::Debug for Uname {
- fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
- #[cfg(not(linux_kernel))]
- {
- write!(
- fmt,
- "{:?} {:?} {:?} {:?} {:?}",
- self.sysname(),
- self.nodename(),
- self.release(),
- self.version(),
- self.machine(),
- )
- }
- #[cfg(linux_kernel)]
- {
- write!(
- fmt,
- "{:?} {:?} {:?} {:?} {:?} {:?}",
- self.sysname(),
- self.nodename(),
- self.release(),
- self.version(),
- self.machine(),
- self.domainname(),
- )
- }
- }
-}
-
-/// `sysinfo()`—Returns status information about the runtime OS.
-///
-/// # References
-/// - [Linux]
-///
-/// [Linux]: https://man7.org/linux/man-pages/man2/uname.2.html
-#[cfg(linux_kernel)]
-#[inline]
-pub fn sysinfo() -> Sysinfo {
- backend::system::syscalls::sysinfo()
-}
-
-/// `sethostname(name)`—Sets the system host name.
-///
-/// # References
-/// - [Linux]
-///
-/// [Linux]: https://man7.org/linux/man-pages/man2/sethostname.2.html
-#[cfg(not(any(
- target_os = "emscripten",
- target_os = "espidf",
- target_os = "redox",
- target_os = "vita",
- target_os = "wasi"
-)))]
-#[inline]
-pub fn sethostname(name: &[u8]) -> io::Result<()> {
- backend::system::syscalls::sethostname(name)
-}
-
-/// Reboot command for use with [`reboot`].
-#[cfg(target_os = "linux")]
-#[derive(Copy, Clone, Debug, Eq, PartialEq)]
-#[repr(i32)]
-#[non_exhaustive]
-pub enum RebootCommand {
- /// Disables the Ctrl-Alt-Del keystroke.
- ///
- /// When disabled, the keystroke will send a [`Signal::Int`] to pid 1.
- ///
- /// [`Signal::Int`]: crate::process::Signal::Int
- CadOff = c::LINUX_REBOOT_CMD_CAD_OFF,
- /// Enables the Ctrl-Alt-Del keystroke.
- ///
- /// When enabled, the keystroke will trigger a [`Restart`].
- ///
- /// [`Restart`]: Self::Restart
- CadOn = c::LINUX_REBOOT_CMD_CAD_ON,
- /// Prints the message "System halted" and halts the system
- Halt = c::LINUX_REBOOT_CMD_HALT,
- /// Execute a kernel that has been loaded earlier with [`kexec_load`].
- ///
- /// [`kexec_load`]: https://man7.org/linux/man-pages/man2/kexec_load.2.html
- Kexec = c::LINUX_REBOOT_CMD_KEXEC,
- /// Prints the message "Power down.", stops the system, and tries to remove
- /// all power
- PowerOff = c::LINUX_REBOOT_CMD_POWER_OFF,
- /// Prints the message "Restarting system." and triggers a restart
- Restart = c::LINUX_REBOOT_CMD_RESTART,
- /// Hibernate the system by suspending to disk
- SwSuspend = c::LINUX_REBOOT_CMD_SW_SUSPEND,
-}
-
-/// `reboot`—Reboot the system or enable/disable Ctrl-Alt-Del
-///
-/// The reboot syscall, despite the name, can actually do much more than
-/// reboot.
-///
-/// Among other things, it can:
-/// - Restart, Halt, Power Off, and Suspend the system
-/// - Enable and disable the Ctrl-Alt-Del keystroke
-/// - Execute other kernels
-/// - Terminate init inside PID namespaces
-///
-/// It is highly recommended to carefully read the kernel documentation before
-/// calling this function.
-///
-/// # References
-/// - [Linux]
-///
-/// [Linux]: https://man7.org/linux/man-pages/man2/reboot.2.html
-#[cfg(target_os = "linux")]
-pub fn reboot(cmd: RebootCommand) -> io::Result<()> {
- backend::system::syscalls::reboot(cmd)
-}