This crate exposes a single type: FileDesc,
which acts as a thin wrapper around open file descriptors.
The wrapped file descriptor is closed when the wrapper is dropped.
You can call FileDesc::new() with any type that implements IntoRawFd,
or duplicate the file descriptor of a type that implements AsRawFd with duplicate_from.
The same is possible for raw file descriptors with the unsafe from_raw_fd() and duplicate_raw_fd().
Wrapped file descriptors can also be duplicated with the duplicate() function.
Whenever the library duplicates a file descriptor, it tries to set the close-on-exec flag atomically.
On platforms where this is not supported, the library falls back to setting the flag non-atomically.
When an existing file descriptor is wrapped, the close-on-exec flag is left as it was.
You can also check or set the close-on-exec flag with the get_close_on_exec()
and set_close_on_exec functions.
```rust use filedesc::FileDesc; let fd = unsafe { FileDesc::fromrawfd(rawfd) }; let duplicated = fd.duplicate()?; asserteq!(duplicated.getcloseon_exec()?, true);
duplicated.setcloseonexec(false)?; asserteq!(duplicated.getcloseon_exec()?, false); ```