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tcflow(3c) [opensolaris 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 5.11 14 Aug 2002 tcflow(3C)

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tcflow(3)						     Library Functions Manual							 tcflow(3)

NAME
tcflow - Performs flow control functions LIBRARY
Standard C Library (libc.so, libc.a) SYNOPSIS
#include <termios.h> int tcflow( int filedes, int action); STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: tcflow(): XPG4, XPG4-UNIX Refer to the standards(5) reference page for more information about industry standards and associated tags. PARAMETERS
Specifies an open file descriptor. Specifies one of the following: Suspend output. Restart suspended output. Transmit a STOP character, which is intended to cause the terminal device to stop transmitting data to the system. Transmit a START character, which is intended to cause the terminal device to start transmitting data to the system. DESCRIPTION
The tcflow() function suspends transmission or reception of data on the object referred to by the filedes parameter, depending on the value of the action parameter. A process group is sent a SIGTTOU signal if the tcflow() function is called from one of its member processes. 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, a value of 0 (zero) is returned. Otherwise, a value of -1 is returned and errno is set to indicate the error. ERRORS
The tcflow() function sets errno to the specified values for the following conditions: The filedes parameter does not specify a valid file descriptor. The action parameter is not a supported value. The file associated with the filedes parameter is not a terminal. RELATED INFORMATION
Functions: tcdrain(3), tcflush(3), tcsendbreak(3) Files: termios(4) Standards: standards(5) delim off tcflow(3)
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