Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

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

1 files changed, 93 insertions, 0 deletions

diff --git a/third_party/rust/nix/src/sys/personality.rs b/third_party/rust/nix/src/sys/personality.rs
new file mode 100644
index 0000000000..f295a05fad
--- /dev/null
+++ b/third_party/rust/nix/src/sys/personality.rs
@@ -0,0 +1,93 @@
+//! Process execution domains
+use crate::errno::Errno;
+use crate::Result;
+
+use libc::{self, c_int, c_ulong};
+
+libc_bitflags! {
+    /// Flags used and returned by [`get()`](fn.get.html) and
+    /// [`set()`](fn.set.html).
+    pub struct Persona: c_int {
+        /// Provide the legacy virtual address space layout.
+        ADDR_COMPAT_LAYOUT;
+        /// Disable address-space-layout randomization.
+        ADDR_NO_RANDOMIZE;
+        /// Limit the address space to 32 bits.
+        ADDR_LIMIT_32BIT;
+        /// Use `0xc0000000` as the offset at which to search a virtual memory
+        /// chunk on [`mmap(2)`], otherwise use `0xffffe000`.
+        ///
+        /// [`mmap(2)`]: https://man7.org/linux/man-pages/man2/mmap.2.html
+        ADDR_LIMIT_3GB;
+        /// User-space function pointers to signal handlers point to descriptors.
+        #[cfg(not(any(target_env = "musl", target_env = "uclibc")))]
+        #[cfg_attr(docsrs, doc(cfg(all())))]
+        FDPIC_FUNCPTRS;
+        /// Map page 0 as read-only.
+        MMAP_PAGE_ZERO;
+        /// `PROT_READ` implies `PROT_EXEC` for [`mmap(2)`].
+        ///
+        /// [`mmap(2)`]: https://man7.org/linux/man-pages/man2/mmap.2.html
+        READ_IMPLIES_EXEC;
+        /// No effects.
+        SHORT_INODE;
+        /// [`select(2)`], [`pselect(2)`], and [`ppoll(2)`] do not modify the
+        /// returned timeout argument when interrupted by a signal handler.
+        ///
+        /// [`select(2)`]: https://man7.org/linux/man-pages/man2/select.2.html
+        /// [`pselect(2)`]: https://man7.org/linux/man-pages/man2/pselect.2.html
+        /// [`ppoll(2)`]: https://man7.org/linux/man-pages/man2/ppoll.2.html
+        STICKY_TIMEOUTS;
+        /// Have [`uname(2)`] report a 2.6.40+ version number rather than a 3.x
+        /// version number.
+        ///
+        /// [`uname(2)`]: https://man7.org/linux/man-pages/man2/uname.2.html
+        #[cfg(not(any(target_env = "musl", target_env = "uclibc")))]
+        #[cfg_attr(docsrs, doc(cfg(all())))]
+        UNAME26;
+        /// No effects.
+        WHOLE_SECONDS;
+    }
+}
+
+/// Retrieve the current process personality.
+///
+/// Returns a Result containing a Persona instance.
+///
+/// Example:
+///
+/// ```
+/// # use nix::sys::personality::{self, Persona};
+/// let pers = personality::get().unwrap();
+/// assert!(!pers.contains(Persona::WHOLE_SECONDS));
+/// ```
+pub fn get() -> Result<Persona> {
+    let res = unsafe { libc::personality(0xFFFFFFFF) };
+
+    Errno::result(res).map(Persona::from_bits_truncate)
+}
+
+/// Set the current process personality.
+///
+/// Returns a Result containing the *previous* personality for the
+/// process, as a Persona.
+///
+/// For more information, see [personality(2)](https://man7.org/linux/man-pages/man2/personality.2.html)
+///
+/// **NOTE**: This call **replaces** the current personality entirely.
+/// To **update** the personality, first call `get()` and then `set()`
+/// with the modified persona.
+///
+/// Example:
+///
+/// ```
+/// # use nix::sys::personality::{self, Persona};
+/// let mut pers = personality::get().unwrap();
+/// assert!(!pers.contains(Persona::ADDR_NO_RANDOMIZE));
+/// personality::set(pers | Persona::ADDR_NO_RANDOMIZE).unwrap();
+/// ```
+pub fn set(persona: Persona) -> Result<Persona> {
+    let res = unsafe { libc::personality(persona.bits() as c_ulong) };
+
+    Errno::result(res).map(Persona::from_bits_truncate)
+}