tcsetpgrp(3p) — Linux manual page

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

PROLOG

       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

       tcsetpgrp — set the foreground process group ID

SYNOPSIS

       #include <unistd.h>

       int tcsetpgrp(int fildes, pid_t pgid_id);

DESCRIPTION

       If the process has a controlling terminal, tcsetpgrp() shall set
       the foreground process group ID associated with the terminal to
       pgid_id.  The application shall ensure that the file associated
       with fildes is the controlling terminal of the calling process
       and the controlling terminal is currently associated with the
       session of the calling process. The application shall ensure that
       the value of pgid_id matches a process group ID of a process in
       the same session as the calling process.

       Attempts to use tcsetpgrp() from a process which is a member of a
       background process group on a fildes associated with its
       controlling terminal shall cause the process group to be sent a
       SIGTTOU signal. If the calling thread is blocking SIGTTOU signals
       or the process is ignoring SIGTTOU signals, the process shall be
       allowed to perform the operation, and no signal is sent.

RETURN VALUE

       Upon successful completion, 0 shall be returned. Otherwise, -1
       shall be returned and errno set to indicate the error.

ERRORS

       The tcsetpgrp() function shall fail if:

       EBADF  The fildes argument is not a valid file descriptor.

       EINVAL This implementation does not support the value in the
              pgid_id argument.

       EIO    The process group of the writing process is orphaned, the
              calling thread is not blocking SIGTTOU, and the process is
              not ignoring SIGTTOU.

       ENOTTY The calling process does not have a controlling terminal,
              or the file is not the controlling terminal, or the
              controlling terminal is no longer associated with the
              session of the calling process.

       EPERM  The value of pgid_id is a value supported by the
              implementation, but does not match the process group ID of
              a process in the same session as the calling process.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       tcgetpgrp(3p)

       The Base Definitions volume of POSIX.1‐2017, sys_types.h(0p),
       unistd.h(0p)

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  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.opengroup.org/unix/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               2017                     TCSETPGRP(3P)

Pages that refer to this page: unistd.h(0p), setpgid(3p), tcgetpgrp(3p)

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