通过 DECRQSS 查询 DECSCUSR — 读取当前光标形状（`\x1bP$q q\x1b\\`）

# Capture current cursor shape (raw + timeout).\nold=$(stty -g); stty -echo raw min 0 time 1\nprintf '\033P$q q\033\\\\' > /dev/tty\nIFS= read -r -d '\\\\' reply < /dev/tty\nstty "$old"\nshape=$(echo "$reply" | sed -nE 's/.*P1\\$r([0-9]+).*/\\1/p')\necho "current cursor: ${shape:-default}"

import sys, termios, tty, re\ndef cursor_shape():\n    fd = sys.stdin.fileno(); old = termios.tcgetattr(fd); tty.setraw(fd)\n    try:\n        sys.stdout.write('\x1bP$q q\x1b\\\\'); sys.stdout.flush()\n        buf = b''\n        while b'\\x1b\\\\' not in buf:\n            buf += sys.stdin.buffer.read1(64)\n        m = re.search(rb'P1\\$r(\\d+)', buf)\n        return int(m.group(1)) if m else 0\n    finally:\n        termios.tcsetattr(fd, termios.TCSADRAIN, old)

// Save shape -> open popup with bar cursor -> restore.\nshape := queryCursorShape()                 // via DECRQSS round-trip\nfmt.Print(\"\\x1b[6 q\")                       // bar for popup\ndefer fmt.Printf(\"\\x1b[%d q\", shape)        // restore on exit

// Query, then echo a description.\nprocess.stdin.setRawMode(true); process.stdin.resume();\nprocess.stdout.write('\\x1bP$q q\\x1b\\\\');\nlet buf = '';\nprocess.stdin.on('data', chunk => {\n    buf += chunk.toString();\n    if (!buf.includes('\\x1b\\\\')) return;\n    process.stdin.setRawMode(false); process.stdin.pause();\n    const m = buf.match(/P1\\$r(\\d+)/);\n    const names = ['default','blink block','steady block','blink underline','steady underline','blink bar','steady bar'];\n    console.log(names[m ? +m[1] : 0]);\n});

/* Round-trip the cursor shape — minimal raw read. */\nprintf(\"\\x1bP$q q\\x1b\\\\\"); fflush(stdout);\nchar buf[64]; int n = read(0, buf, sizeof buf - 1);\nint shape = 0;\nif (n > 0) { buf[n] = 0; sscanf(strstr(buf, \"P1$r\"), \"P1$r%d\", &shape); }