tcgetpgrp(3) - NetBSD Manual Pages

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TCGETPGRP(3)            NetBSD Library Functions Manual           TCGETPGRP(3)


NAME

     tcgetpgrp - get foreground process group ID


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #include <unistd.h>

     pid_t
     tcgetpgrp(int fd);


DESCRIPTION

     The tcgetpgrp function returns the value of the process group ID of the
     foreground process group associated with the terminal device.  If there
     is no foreground process group, tcgetpgrp returns an invalid process ID.


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.

     [ENOTTY]           The calling process does not have a controlling termi-
                        nal or the underlying terminal device represented by
                        fd is not the controlling terminal.


SEE ALSO

     setpgid(2), setsid(2), tcsetpgrp(3)


STANDARDS

     The tcgetpgrp function conforms to ISO/IEC 9945-1:1990 (``POSIX.1'').

NetBSD 2.1                       June 4, 1993                       NetBSD 2.1