TCSETPGRP(3)             BSD Library Functions Manual             TCSETPGRP(3)

NAME
     tcsetpgrp -- set foreground process group ID

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     ##include <>
     ##include <>

     int
     tcsetpgrp(int fd, pidt pgrpid);

DESCRIPTION
     If the process has a controlling terminal, the tcsetpgrp() function sets
     the foreground process group ID associated with the terminal device to
     pgrpid.  The terminal device associated with fd must be the controlling
     terminal of the calling process and the controlling terminal must be cur-
     rently associated with the session of the calling process.  The value of
     pgrpid must be the same as the process group ID of a process in the same
     session as the calling process.

RETURN VALUES
     The tcsetpgrp() function returns the value 0 if successful; otherwise the
     value -1 is returned and the global variable errno is set to indicate the
     error.

ERORS
     The tcsetpgrp() function will fail if:

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

     [EINVAL]           An invalid value of pgrpid was specified.

     [ENOTY]           The calling process does not have a controlling termi-
                        nal, or the file represented by fd is not the control-
                        ling terminal, or the controlling terminal is no
                        longer associated with the session of the calling
                        process.

     [EPERM]            The pgrpid argument does not match the process group
                        ID of a process in the same session as the calling
                        process.

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

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

BSD                              June 4, 1993                              BSD