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107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
/*
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* Copyright 2013, Tan Chee Eng (@tan-ce)
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*/
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/*
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* pts.h
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*
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* Manages the pseudo-terminal driver on Linux/Android and provides some
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* helper functions to handle raw input mode and terminal window resizing
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*/
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#ifndef _PTS_H_
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#define _PTS_H_
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#include <sys/types.h>
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/**
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* pts_open
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*
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* Opens a pts device and returns the name of the slave tty device.
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*
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* Arguments
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* slave_name the name of the slave device
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* slave_name_size the size of the buffer passed via slave_name
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*
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* Return Values
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* on failure either -2 or -1 (errno set) is returned.
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* on success, the file descriptor of the master device is returned.
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*/
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int pts_open(char *slave_name, size_t slave_name_size);
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/**
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* set_stdin_raw
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*
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* Changes stdin to raw unbuffered mode, disables echo,
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* auto carriage return, etc.
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*
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* Return Value
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* on failure -1, and errno is set
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* on success 0
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*/
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int set_stdin_raw(void);
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/**
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* restore_stdin
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*
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* Restore termios on stdin to the state it was before
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* set_stdin_raw() was called. If set_stdin_raw() was
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* never called, does nothing and doesn't return an error.
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*
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* This function is async-safe.
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*
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* Return Value
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* on failure, -1 and errno is set
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* on success, 0
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*/
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int restore_stdin(void);
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/**
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* watch_sigwinch_async
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*
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* After calling this function, if the application receives
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* SIGWINCH, the terminal window size will be read from
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* "input" and set on "output".
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*
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* NOTE: This function blocks SIGWINCH and spawns a thread.
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*
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* Arguments
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* master A file descriptor of the TTY window size to follow
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* slave A file descriptor of the TTY window size which is
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* to be set on SIGWINCH
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*
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* Return Value
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* on failure, -1 and errno will be set. In this case, no
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* thread has been spawned and SIGWINCH will not be
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* blocked.
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* on success, 0
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*/
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int watch_sigwinch_async(int master, int slave);
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/**
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* watch_sigwinch_cleanup
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*
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* Cause the SIGWINCH watcher thread to terminate
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*/
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void watch_sigwinch_cleanup(void);
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/**
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* pump_stdin_async
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*
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* Forward data from STDIN to the given FD
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* in a seperate thread
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*/
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void pump_stdin_async(int outfd);
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/**
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* pump_stdout_blocking
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*
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* Forward data from the FD to STDOUT.
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* Returns when the remote end of the FD closes.
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*
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* Before returning, restores stdin settings.
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*/
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void pump_stdout_blocking(int infd);
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#endif
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