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
None.
FUTURE DIRECTIONS
None.
SEE ALSO
open() , ptsname() , unlockpt() , the Base Definitions volume of
IEEE Std 1003.1-2001, <stdlib.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 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 .