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 .