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Интерактивная система просмотра системных руководств (man-ов)

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tcsendbreak (3)
  • >> tcsendbreak (3) ( Solaris man: Библиотечные вызовы )
  • tcsendbreak (3) ( FreeBSD man: Библиотечные вызовы )
  • tcsendbreak (3) ( Русские man: Библиотечные вызовы )
  • tcsendbreak (3) ( Linux man: Библиотечные вызовы )
  • tcsendbreak (3) ( POSIX man: Библиотечные вызовы )
  •  

    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 TYPEATTRIBUTE VALUE

    Interface StabilityStandard

    MT-Level

     

    SEE ALSO

    tcdrain(3C), attributes(5), standards(5), termio(7I)


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    ERRORS
    ATTRIBUTES
    SEE ALSO


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