TCGETPGRP(3) BSD Library Functions Manual TCGETPGRP(3)

NAME
     ttccggeettppggrrpp - get foreground process group ID

LLIIBBRRAARRYY
     Standard C Library (libc, -lc)

SYNOPSIS
     ##iinncclluuddee <>
     ##iinncclluuddee <>

     pidt
     ttccggeettppggrrpp(int fd);

DESCRIPTION
     The ttccggeettppggrrpp() function returns the value of the process group ID of the
     foreground process group associated with the terminal device.  If there
     is no foreground process group, ttccggeettppggrrpp() returns an invalid process
     ID.

EERRRROORRSS
     If an error occurs, ttccggeettppggrrpp() returns -1 and the global variable errno
     is set to indicate the error, as follows:

     [EBADF]            The fd argument is not a valid file descriptor.

     [ENOTTY]           The calling process does not have a controlling termi-
                        nal or the underlying terminal device represented by
                        fd is not the controlling terminal.

SEE ALSO
     setpgid(2), setsid(2), tcsetpgrp(3)

STANDARDS     The ttccggeettppggrrpp() function is expected to be compliant with the IEEE Std
     1003.1-1988 (``POSIX.1'') specification.

BSD                              June 4, 1993                              BSD