fix finding the active tty name

apparently $TTY is a shell builtin variable, and not set in the actual
environment

1 files changed, 2 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index d636716..1a4d1b6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,7 +23,9 @@ daemonize = "0.4"
 directories = "2.0"
 env_logger = "0.7"
 humantime = "2.0"
+libc = "0.2"
 log = "0.4"
+memchr = "2.3"
 nix = "0.17"
 openssl = "0.10"
 paw = "1.0"