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lua: subprocess: fix Ctrl+C handling on Windows
The CREATE_NO_WINDOW flag is used to prevent the subprocess from creating an empty console window when mpv is not running in a console. When mpv is running in a console, it causes the subprocess to detach itself, and prevents it from seeing Ctrl+C events, so it hangs around in the background after mpv is killed. Fix this by only specifying CREATE_NO_WINDOW when mpv is not attached to a console. When it is attached to a console, subprocesses will automatically inherit the console and correctly receive Ctrl+C events.
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parent
f2b94a3b49
commit
6a1746b4e3
14
player/lua.c
14
player/lua.c
@ -1343,6 +1343,7 @@ static int subprocess(char **args, struct mp_cancel *cancel, void *ctx,
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// Convert the args array to a UTF-16 Windows command-line string
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wchar_t *cmdline = write_cmdline(tmp, args);
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DWORD flags = CREATE_UNICODE_ENVIRONMENT;
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PROCESS_INFORMATION pi = {0};
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STARTUPINFOW si = {
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.cb = sizeof(si),
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@ -1352,9 +1353,16 @@ static int subprocess(char **args, struct mp_cancel *cancel, void *ctx,
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.hStdError = pipes[1].write,
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};
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if (!CreateProcessW(NULL, cmdline, NULL, NULL, TRUE,
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CREATE_NO_WINDOW | CREATE_UNICODE_ENVIRONMENT,
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NULL, NULL, &si, &pi))
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// If we have a console, the subprocess will automatically attach to it so
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// it can receive Ctrl+C events. If we don't have a console, prevent the
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// subprocess from creating its own console window by specifying
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// CREATE_NO_WINDOW. GetConsoleCP() can be used to reliably determine if we
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// have a console or not (Cygwin uses it too.)
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if (!GetConsoleCP())
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flags |= CREATE_NO_WINDOW;
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if (!CreateProcessW(NULL, cmdline, NULL, NULL, TRUE, flags, NULL, NULL,
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&si, &pi))
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goto done;
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talloc_free(cmdline);
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CloseHandle(pi.hThread);
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