mirror of https://github.com/mpv-player/mpv
terminal-unix: Add some comments about FD use.
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@ -268,6 +268,11 @@ static bool read_terminal;
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static void enable_kx(bool enable)
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{
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// This check is actually always true, as enable_kx calls are all guarded
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// by read_terminal, which is true only if both stdin and stdout are a
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// tty. Note that stderr being redirected away has no influence over mpv's
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// I/O handling except for disabling the terminal OSD, and thus stderr
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// shouldn't be relied on here either.
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if (isatty(STDOUT_FILENO)) {
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char *cmd = enable ? "\033=" : "\033>";
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printf("%s", cmd);
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@ -472,6 +477,9 @@ int terminal_init(void)
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assert(!getch2_enabled);
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getch2_enabled = 1;
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// Disable reading from the terminal even if stdout is not a tty, to make
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// mpv ... | less
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// do the right thing.
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read_terminal = isatty(STDIN_FILENO) && isatty(STDOUT_FILENO);
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// handlers to fix terminal settings
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