bionic (3) grantpt.3posix.gz

Provided by: manpages-posix-dev_2013a-2_all bug

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
       grantpt — grant access to the slave pseudo-terminal device


SYNOPSIS
       #include <stdlib.h>

       int grantpt(int fildes);


DESCRIPTION
       The grantpt() function shall change the mode and ownership of the slave pseudo-terminal device associated
       with its master pseudo-terminal counterpart. The fildes argument is a file descriptor that  refers  to  a
       master  pseudo-terminal  device.  The  user  ID  of the slave shall be set to the real UID of the calling
       process and the group ID shall be set to an unspecified group  ID.  The  permission  mode  of  the  slave
       pseudo-terminal shall be set to readable and writable by the owner, and writable by the group.

       The  behavior  of the grantpt() function is unspecified if the application has installed a signal handler
       to catch SIGCHLD signals.


RETURN VALUE
       Upon successful completion, grantpt() shall return 0; otherwise, it shall return  −1  and  set  errno  to
       indicate the error.


ERRORS
       The grantpt() function may fail if:

       EBADF  The fildes argument is not a valid open file descriptor.

       EINVAL The fildes argument is not associated with a master pseudo-terminal device.

       EACCES The corresponding slave pseudo-terminal device could not be accessed.

       The following sections are informative.


EXAMPLES
       None.


APPLICATION USAGE
       None.


RATIONALE
       See the RATIONALE section for posix_openpt().


FUTURE DIRECTIONS
       None.


SEE ALSO
       open(), posix_openpt(), ptsname(), unlockpt()

       The Base Definitions volume of POSIX.1‐2008, <stdlib.h>


       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 .