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(opensolaris section 3c)
man page for tcsendbreak

tcsendbreak(3C) 					   Standard C Library Functions 					   tcsendbreak(3C)

tcsendbreak - send a ``break'' for a specific duration SYNOPSIS
#include <termios.h> int tcsendbreak(int fildes, int duration); DESCRIPTION
The fildes argument is an open file descriptor associated with a terminal. If the terminal is using asynchronous serial data transmission, tcsendbreak() will cause transmission of a continuous stream of zero-valued bits for a specific duration. If duration is 0, it will cause transmission of zero-valued bits for at least 0.25 seconds, and not more than 0.5 seconds. If duration is not 0, it behaves in a way similar to tcdrain(3C). If the terminal is not using asynchronous serial data transmission, it sends data to generate a break condition or returns without taking any action. Attempts to use tcsendbreak() from a process which is a member of a background process group on a fildes associated with its controlling terminal will cause the process group to be sent a SIGTTOU signal. If the calling process is blocking or ignoring SIGTTOU signals, the process is allowed to perform the operation, and no signal is sent. RETURN VALUES
Upon successful completion, 0 is returned. Otherwise, -1 is returned and errno is set to indicate the error. ERRORS
The tcsendbreak() function will fail if: EBADF The fildes argument is not a valid file descriptor. ENOTTY The file associated with fildes is not a terminal. The tcsendbreak() function may fail if: EIO The process group of the writing process is orphaned, and the writing process is not ignoring or blocking SIGTTOU. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-------------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-------------------------------+ |Interface Stability |Standard | +-----------------------------+-------------------------------+ |MT-Level |MT-Safe, and Async-Signal-Safe | +-----------------------------+-------------------------------+ SEE ALSO
tcdrain(3C), attributes(5), standards(5), termio(7I) SunOS 5.11 14 Aug 2002 tcsendbreak(3C)

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