DA — Device Attributes (CSI c / CSI > c)

Byte forms

Every common string-literal form so you can paste-and-search either direction.

Description

Device Attributes — a request/reply pair the application sends and the terminal answers via the input stream. **Primary DA** (`\x1b[c`, sometimes `\x1b[0c`) — terminal replies with `\x1b[?64;...c` listing the VT class and supported optional features (132-column mode, sixel, ReGIS, user-defined keys, etc.). **Secondary DA** (`\x1b[>c`, sometimes `\x1b[>0c`) — terminal replies with `\x1b[>Pp;Pv;Pcc` where Pp is the model (`0`=VT100, `1`=VT220, `41`=VT420, `61`=xterm-style, `65`=VT525, etc.), Pv is the firmware version, Pcc is the ROM cart serial (usually 0). Apps use DA on startup to feature-detect — neovim's `t_Co` autodetect, tmux's title-set capability probing, mintty's xterm-compat checks all rely on it.

Spec citation: ECMA-48 §8.3.24 (DA) / xterm-ctlseqs

Examples

# Send primary DA and read the reply (raw mode):\nstty -echo raw min 0 time 5\nprintf '\033[c'; IFS= read -r -t 1 -d c REPLY; stty sane\necho "DA reply: $REPLY c"

import sys, termios, tty, select\nfd = sys.stdin.fileno(); old = termios.tcgetattr(fd); tty.setraw(fd)\ntry:\n    sys.stdout.write('\x1b[c'); sys.stdout.flush()\n    r, _, _ = select.select([fd], [], [], 1.0)\n    print(repr(sys.stdin.read(64)) if r else 'no reply')\nfinally:\n    termios.tcsetattr(fd, termios.TCSADRAIN, old)

fmt.Print("\x1b[c")   // request; read reply via os.Stdin in raw mode

process.stdout.write('\x1b[c')   // reply arrives on process.stdin

printf("\x1b[c"); fflush(stdout); /* read reply from stdin */

Terminal support

xterm

yes

Linux console (fbcon)

yes

macOS Terminal.app

yes

iTerm2

yes

Windows Terminal

yes

cmd.exe / ConPTY

partial

kitty

yes

alacritty

yes

WezTerm

yes

Ghostty

yes

GNOME Terminal

yes

Konsole

yes

tmux

no

GNU screen

no

Related sequences

• DSR — Device Status Report (CSI 5n / CSI 6n)
• DECRQM — Request Mode Status (CSI ? Ps $ p)
• RIS — Reset to Initial State (full terminal reset)

In the family cookbook

↗CSI cookbook · 4. Queries — DA, DA2, DSR, DECRQM