* fhandler.h (class fhandler_tty_common): New mutex and event to
syncronize input on master tty with slave tty. * fhandler_tty.cc (fhandler_pty_master::accept_input): Use them to syncronize with slave. * fhandler_tty.cc (fhandler_tty_slave::read): Use input mutex and event to syncronize with master. Do not limit amount of data read from master to vmin value. Interrupt on signal and return already read data, if any. * fhandler_tty.cc (fhandler_tty_slave::open): Handle input mutex and event. * fhandler_tty.cc (fhandler_tty_common::close): Ditto. * fhandler_tty.cc (fhandler_tty_common::set_close_on_exec): Ditto. * fhandler_tty.cc (fhandler_tty_common::fixup_after_fork): Ditto. * fhandler_tty.cc (fhandler_tty_common::dup): Ditto. * tty.h (tty::open_input_mutex): New function. * tty.cc (tty::common_init): Create input mutex and event.
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@@ -707,7 +707,8 @@ public:
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// Ioctl() request in tty::cmd/arg.
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HANDLE ioctl_done_event; // Raised by master on ioctl() completion.
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// Ioctl() status in tty::ioctl_retval.
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HANDLE output_mutex;
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HANDLE output_mutex, input_mutex;
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HANDLE input_available_event;
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HANDLE inuse; // used to indicate that a tty is in use
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