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

    NAME

    tcgetpgrp - get the foreground process group ID
     
    

    SYNOPSIS

    #include <unistd.h>

    pid_t tcgetpgrp(int fildes);
     

    DESCRIPTION

    The tcgetpgrp() function shall return the value of the process group ID of the foreground process group associated with the terminal.

    If there is no foreground process group, tcgetpgrp() shall return a value greater than 1 that does not match the process group ID of any existing process group.

    The tcgetpgrp() function is allowed from a process that is a member of a background process group; however, the information may be subsequently changed by a process that is a member of a foreground process group.  

    RETURN VALUE

    Upon successful completion, tcgetpgrp() shall return the value of the process group ID of the foreground process associated with the terminal. Otherwise, -1 shall be returned and errno set to indicate the error.  

    ERRORS

    The tcgetpgrp() function shall fail if:

    EBADF
    The fildes argument is not a valid file descriptor.
    ENOTTY
    The calling process does not have a controlling terminal, or the file is not the controlling terminal.

    The following sections are informative.  

    EXAMPLES

    None.  

    APPLICATION USAGE

    None.  

    RATIONALE

    None.  

    FUTURE DIRECTIONS

    None.  

    SEE ALSO

    setsid() , setpgid() , tcsetpgrp() , the Base Definitions volume of IEEE Std 1003.1-2001, <sys/types.h>, <unistd.h>  

    COPYRIGHT

    Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    EXAMPLES
    APPLICATION USAGE
    RATIONALE
    FUTURE DIRECTIONS
    SEE ALSO
    COPYRIGHT


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