TCSETPGRP(3)            NetBSD Library Functions Manual           TCSETPGRP(3)

NAME
     tcsetpgrp -- set foreground process group ID

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <unistd.h>

     int
     tcsetpgrp(int fd, pid_t pgrp_id);

DESCRIPTION
     If the process has a controlling terminal, the tcsetpgrp function sets
     the foreground process group ID associated with the terminal device to
     pgrp_id.  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
     pgrp_id must be the same as the process group ID of a process in the same
     session as the calling process.

     Upon successful completion, tcsetpgrp returns a value of zero.

ERRORS
     If an error occurs, tcgetpgrp 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.

     [EINVAL]           An invalid value of pgrp_id was specified.

     [ENOTTY]           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 pgrp_id 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 tcsetpgprp function conforms to ISO/IEC 9945-1:1990 (``POSIX.1'').

NetBSD 9.0                       June 4, 1993                       NetBSD 9.0