NAME

       TIOCGPGRP, TIOCSPGRP, TIOCGSID - process group and session ID

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <asm/termbits.h>  /* Definition of TIOC* constants */
       #include <sys/ioctl.h>

       int ioctl(int fd, TIOCGPGRP, pid_t *argp);
       int ioctl(int fd, TIOCSPGRP, const pid_t *argp);
       int ioctl(int fd, TIOCGSID, pid_t *argp);

DESCRIPTION

       TIOCGPGRP
              When successful, equivalent to *argp = tcgetpgrp(fd).

              Get the process group ID of the foreground process group on this terminal.

       TIOCSPGRP
              Equivalent to tcsetpgrp(fd, *argp).

              Set the foreground process group ID of this terminal.

       TIOCGSID
              When successful, equivalent to *argp = tcgetsid(fd).

              Get  the session ID of the given terminal.  This fails with the error ENOTTY if the
              terminal is not a master pseudoterminal and not our controlling terminal.  Strange.

RETURN VALUE

       On success, 0 is returned.  On error, -1 is returned, and errno is  set  to  indicate  the
       error.

ERRORS

       ENOTTY The terminal is not a master pseudoterminal and not our controlling terminal.

       EPERM  Insufficient permission.

SEE ALSO

       ioctl(2), ioctl_tty(2), tcgetpgrp(3), tcsetpgrp(3), tcgetsid(3)