Function nix_set_err_msg 

pub unsafe extern "C" fn nix_set_err_msg(
    context: *mut nix_c_context,
    err: nix_err,
    msg: *const c_char,
) -> nix_err

Set an error message on a nix context.

This should be used when you want to throw an error from a PrimOp callback.

All other use is internal to the API.

Arguments

• context - context to write the error message to, required unless C++ exceptions are supported
• err - The error code to set and return
• msg - The error message to set. This string is copied.

Returns

• the error code set