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NAME

       tcsetpgrp - set the foreground process group ID

SYNOPSIS

       #include <unistd.h>

       int tcsetpgrp(int fildes, pid_t pgid_id);

DESCRIPTION

       If  the  process  has a controlling terminal, tcsetpgrp() shall set the
       foreground process group ID associated with the  terminal  to  pgid_id.
       The  application  shall  ensure that the file associated with fildes is
       the controlling terminal of the calling  process  and  the  controlling
       terminal  is  currently  associated  with  the  session  of the calling
       process. The application shall ensure that the value of pgid_id matches
       a  process  group  ID  of  a process in the same session as the calling
       process.

       Attempts to use tcsetpgrp() from a process  which  is  a  member  of  a
       background  process  group  on a fildes associated with its controlling
       terminal shall cause the process group to be sent a SIGTTOU signal.  If
       the  calling  process  is  blocking  or  ignoring  SIGTTOU signals, the
       process shall be allowed to perform the operation,  and  no  signal  is
       sent.

RETURN VALUE

       Upon successful completion, 0 shall be returned. Otherwise, -1 shall be
       returned and errno set to indicate the error.

ERRORS

       The tcsetpgrp() function shall fail if:

       EBADF  The fildes argument is not a valid file descriptor.

       EINVAL This implementation does not support the value  in  the  pgid_id
              argument.

       ENOTTY The calling process does not have a controlling terminal, or the
              file  is  not  the  controlling  terminal,  or  the  controlling
              terminal is no longer associated with the session of the calling
              process.

       EPERM  The value of pgid_id is a value supported by the implementation,
              but does not match the process group ID of a process in the same
              session as the calling process.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       tcgetpgrp() , 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 .