sway: escape commands from launcher before sending to IPC

`swaymsg exec` does not preserve quoting or field splitting of the
arguments. Additional escaping is necessary to be able to pass fields
with special characters, such as spaces or quotes.

scripts/sway/sway-ipc-exec

@@ -0,0 +1,61 @@
+#!/usr/bin/python3
+"""
+Pass the arguments to the `exec` i3 IPC command with proper escaping.
+The script could be used as a replacement for `swaymsg exec --`.
+
+See also: https://github.com/swaywm/sway/issues/5931
+Usage: rofi -run-command "this-script {cmd}"
+"""
+
+import json
+import os
+import socket
+import struct
+import sys
+
+
+IPC_COMMAND = 0x0
+MAGIC = "i3-ipc".encode("utf-8")
+# IPC message format: <magic> <len> <type> <payload> in native byte order
+IPC_HEADER = f"={len(MAGIC)}sII"
+IPC_HEADER_SIZE = struct.calcsize(IPC_HEADER)
+
+SWAYSOCK = os.environ.get("SWAYSOCK", os.environ.get("I3SOCK", None))
+TABLE = str.maketrans({c: "\\" + c for c in " $'\"\\(),;\t"})
+
+
+def quote(field: str):
+    return field.translate(TABLE)
+
+
+def ipc_send(sock: socket.socket, msg: int, payload: str):
+    data = payload.encode("utf-8")
+    data = struct.pack(IPC_HEADER, MAGIC, len(data), msg) + data
+
+    sock.sendall(data)
+
+    data = sock.recv(IPC_HEADER_SIZE)
+    if len(data) != IPC_HEADER_SIZE:
+        return False
+
+    magic, msg_len, msg_type = struct.unpack(IPC_HEADER, data)
+    if magic != MAGIC or msg_type != msg:
+        return False
+
+    data = sock.recv(msg_len)
+    if len(data) != msg_len:
+        return False
+
+    result = json.loads(data)
+    return result[0].get("success", False)
+
+
+if SWAYSOCK is None:
+    sys.exit(1)
+
+with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as sock:
+    sock.connect(SWAYSOCK)
+    args = map(quote, sys.argv[1:])
+    if not ipc_send(sock, IPC_COMMAND, "exec " + " ".join(args)):
+        sys.exit(1)
+    sock.shutdown(socket.SHUT_RDWR)

sway/config.in

@@ -21,6 +21,8 @@ set $term foot
 # on the original workspace that the command was run on.
 # Recommends: rofi-wayland
 set $rofi_cmd rofi \
+        -run-command '$LIBEXECDIR/sway/sway-ipc-exec {cmd}' \
+        -run-shell-command '$LIBEXECDIR/sway/sway-ipc-exec {terminal} -e {cmd}' \
         -terminal '$term'
 # Shows a combined list of the applications with desktop files and
 # executables from PATH.

tests/run-test-exec

@@ -0,0 +1,15 @@
+#!/bin/sh
+# Entrypoint for exec wrapper tests
+
+DIRNAME=$(realpath "$0")
+DIRNAME=$(dirname "$DIRNAME")
+DIRNAME=$(dirname "$DIRNAME")
+
+for WRAPPER in "" "$DIRNAME/scripts/sway/sway-ipc-exec"; do
+    $WRAPPER "$DIRNAME/tests/test helper" --lor\'em \
+        'ipsum $dolor sit"  amet;' \
+        "consectetur	adipiscing\' elit," \
+        "(sed do eiusmod tempor) [incididunt ut labore]" \
+        et\ dolore\ magna\[\ aliqua.
+done
+echo "Check the second test result in Sway output (journal or stdout)"

tests/test helper

@@ -0,0 +1,24 @@
+#!/usr/bin/python3
+
+import sys
+
+TEST = [
+    "--lor'em",
+    'ipsum $dolor sit"  amet;',
+    "consectetur\tadipiscing\\' elit,",
+    "(sed do eiusmod tempor) [incididunt ut labore]",
+    "et dolore magna[ aliqua.",
+]
+
+status = "passed"
+
+if len(sys.argv) != len(TEST) + 1:
+    status = "failed"
+
+for left, right in zip(sys.argv[1:], TEST):
+    if left != right:
+        print(f"'{left}' != '{right}'")
+        status = "failed"
+
+print(f"Test status: {status}")
+sys.exit(0 if status == "passed" else 1)