Function libssh2_sys::libssh2_channel_setenv_ex

pub unsafe extern "C" fn libssh2_channel_setenv_ex(
    chan: *mut LIBSSH2_CHANNEL, 
    var: *const c_char, 
    varlen: c_uint, 
    val: *const c_char, 
    vallen: c_uint
) -> c_int