PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

TCGETPGRP(3P)             POSIX Programmer's Manual            TCGETPGRP(3P)

PROLOG         top

       This manual page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior), or
       the interface may not be implemented on Linux.

NAME         top

       tcgetpgrp — get the foreground process group ID

SYNOPSIS         top

       #include <unistd.h>

       pid_t tcgetpgrp(int fildes);

DESCRIPTION         top

       The tcgetpgrp() function shall return the value of the process group
       ID of the foreground process group associated with the terminal.

       If there is no foreground process group, tcgetpgrp() shall return a
       value greater than 1 that does not match the process group ID of any
       existing process group.

       The tcgetpgrp() function is allowed from a process that is a member
       of a background process group; however, the information may be
       subsequently changed by a process that is a member of a foreground
       process group.

RETURN VALUE         top

       Upon successful completion, tcgetpgrp() shall return the value of the
       process group ID of the foreground process associated with the
       terminal. Otherwise, −1 shall be returned and errno set to indicate
       the error.

ERRORS         top

       The tcgetpgrp() function shall fail if:

       EBADF  The fildes argument is not a valid file descriptor.

       ENOTTY The calling process does not have a controlling terminal, or
              the file is not the controlling terminal.

       The following sections are informative.

EXAMPLES         top

       None.

APPLICATION USAGE         top

       None.

RATIONALE         top

       None.

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       setsid(3p), setpgid(3p), tcsetpgrp(3p)

       The Base Definitions volume of POSIX.1‐2008, sys_types.h(0p),
       unistd.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The Open
       Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
       applied.) 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.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the
       source files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                 2013                       TCGETPGRP(3P)