OSC 9 ; 12 Prompt Start
Mark where the shell's prompt starts, the ConEmu way.
OSC 9 ; 12 ST
- ECMA-48
- §8.3.89 OSC – Operating System Command, p. 51
- Specification
- ConEmu specific OSC, ConEmu's ANSI escape codes
OSC 9 ; 12 ST tells the terminal that the prompt starts at the cursor, so that it can find the prompts in what scrolled by. A shell sends it from its prompt string. It does the job of the A mark of OSC 133.
It is one of the commands ConEmu, a Windows terminal, put under OSC 9; the progress report page lists them all, and their definition is the ConEmu specific OSC table in ConEmu’s documentation. iTerm2 uses OSC 9 ; text ST for a notification, and a terminal that has both tells them apart by what follows the 9.
A default xterm ignores all of OSC 9, which is not among the OSC numbers it knows.
libghostty-vt marks the prompt, as it does for OSC 133, so the case is a known difference.
Support
| Terminal | Version | Support | Notes |
|---|---|---|---|
| VT220 | manual, 2nd ed., 1984 | No | OSC is not among the controls it recognizes (§4.2) |
| VT510 | manual, 1st ed., 1993 | No | ignores an OSC string (chapter 4) |
| xterm | patch 412, xterm-411a | No | OSC 9 is not among the OSC numbers it knows |
| libghostty-vt | 0f171f6 | Yes | CONEMU12-1: marks the prompt start, as for OSC 133 |
| Konsole | 26.11.70, a24c3d71 | No | only OSC 9 ; 4, the progress report, is acted on |
| ConEmu | build 230724, its documentation | Yes | ConEmu specific OSC |
Validation
CONEMU12-1: The start of a prompt
\e]9;12\a
$
|$_____|
attr 1,1 semantic=output