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TCSETPGRP(3)               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
     currently 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
                        terminal, or the file represented by fd is not the
                        controlling 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 IEEE Std 1003.1-1990 ("POSIX.1").

NetBSD 10.99                     June 4, 1993                     NetBSD 10.99