Function pidfd_getfd

pub fn pidfd_getfd<Fd: AsFd>(
    pidfd: Fd,
    targetfd: ForeignRawFd,
    flags: PidfdGetfdFlags,
) -> Result<OwnedFd>

syscall(SYS_pidfd_getfd, pidfd, flags)—Obtain a duplicate of another process’ file descriptor.

References

• Linux

Warning

This function is generally safe for the calling process, but it can impact the target process in unexpected ways. If you want to ensure that Rust I/O safety assumptions continue to hold in the target process, then the target process must have communicated the file description number to the calling process from a value of a type that implements AsRawFd, and the target process must not drop that value until after the calling process has returned from pidfd_getfd.

When pidfd_getfd is used to debug the target, or the target is not a Rust application, or pidfd_getfd is used in any other way, then extra care should be taken to avoid unexpected behaviour or crashes.

For further details, see the references above.