Changelog for a recent release of SecureShell for Chrome
included a mention of “Support for iTerm2 OSC-9 growl notifications”. This is displayed in terminal when you’re SSHing into a machine, and this entry piqued my interest.
Turns out it’s from hterm’s changelog. And turns out hterm has a nice list of supported control sequences.
OSC are “operating system command” control sequences and there’s a few of them supported by hterm / SecureShell. I find a few super interesting (
\033 being ESC in the doc linked above):
- 0: set window title:
echo -e "\033]0;This is the window title\a"
- 9: show system notification (iTerm2 variant):
echo -e "\033]9;This is the notification text\a"
- 777: show system notification (rxvt-unicode / urxvt variant):
echo -e "\033]777;notify;This is the notification title;This is the notification text\a"
- 52: clipboard operation; hterm only supports
echo -e "\033]52;c;$(base64 <<< hello)\a"