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tcsendbreak(3c) [opensolaris man page]

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

NAME
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)

Check Out this Related Man Page

tcflow(3C)						   Standard C Library Functions 						tcflow(3C)

NAME
tcflow - suspend or restart the transmission or reception of data SYNOPSIS
#include <termios.h> int tcflow(int fildes, int action); DESCRIPTION
The tcflow() function suspends transmission or reception of data on the object referred to by fildes, depending on the value of action. The fildes argument is an open file descriptor associated with a terminal. o If action is TCOOFF, output is suspended. o If action is TCOON, suspended output is restarted. o If action is TCIOFF, the system transmits a STOP character, which is intended to cause the terminal device to stop transmitting data to the system. o If action is TCION, the system transmits a START character, which is intended to cause the terminal device to start transmitting data to the system. The default on the opening of a terminal file is that neither its input nor its output are suspended. Attempts to use tcflow() from a process which is a member of a background process group on a fildes associated with its controlling termi- nal, 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 tcflow() function will fail if: EBADF The fildes argument is not a valid file descriptor. EINVAL The action argument is not a supported value. ENOTTY The file associated with fildes is not a terminal. The tcflow() 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
tcsendbreak(3C), attributes(5), standards(5), termio(7I) SunOS 5.10 14 Aug 2002 tcflow(3C)
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