Function nix_err_msg

pub unsafe extern "C" fn nix_err_msg(
    context: *mut nix_c_context,
    ctx: *const nix_c_context,
    n: *mut c_uint,
) -> *const c_char

@addtogroup errors Retrieves the most recent error message from a context. @pre This function should only be called after a previous nix function has returned an error.

Arguments

• context [out] - optional, the context to store errors in if this function fails
• ctx [in] - the context to retrieve the error message from
• n [out] - optional: a pointer to an unsigned int that is set to the length of the error.

Returns

nullptr if no error message was ever set, a borrowed pointer to the error message otherwise, which is valid until the next call to a Nix function, or until the context is destroyed.