2004-11-03 13:51:07 +00:00
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.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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2007-06-20 22:33:04 +00:00
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.TH "GRANTPT" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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2004-11-03 13:51:07 +00:00
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.\" grantpt
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2007-09-20 06:03:25 +00:00
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.SH PROLOG
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This manual page is part of the POSIX Programmer's Manual.
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The Linux implementation of this interface may differ (consult
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the corresponding Linux manual page for details of Linux behavior),
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or the interface may not be implemented on Linux.
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2004-11-03 13:51:07 +00:00
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.SH NAME
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grantpt \- grant access to the slave pseudo-terminal device
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.SH SYNOPSIS
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.LP
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\fB#include <stdlib.h>
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.br
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.sp
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int grantpt(int\fP \fIfildes\fP\fB); \fP
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\fB
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.br
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\fP
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.SH DESCRIPTION
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.LP
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The \fIgrantpt\fP() function shall change the mode and ownership of
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the slave pseudo-terminal device associated with its master
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pseudo-terminal counterpart. The \fIfildes\fP argument is a file descriptor
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that refers to a master pseudo-terminal device. The
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user ID of the slave shall be set to the real UID of the calling process
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and the group ID shall be set to an unspecified group ID.
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The permission mode of the slave pseudo-terminal shall be set to readable
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and writable by the owner, and writable by the group.
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.LP
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The behavior of the \fIgrantpt\fP() function is unspecified if the
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application has installed a signal handler to catch SIGCHLD
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signals.
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.SH RETURN VALUE
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.LP
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Upon successful completion, \fIgrantpt\fP() shall return 0; otherwise,
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it shall return -1 and set \fIerrno\fP to indicate the
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error.
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.SH ERRORS
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.LP
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The \fIgrantpt\fP() function may fail if:
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.TP 7
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.B EBADF
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The \fIfildes\fP argument is not a valid open file descriptor.
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.TP 7
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.B EINVAL
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The \fIfildes\fP argument is not associated with a master pseudo-terminal
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device.
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.TP 7
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.B EACCES
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The corresponding slave pseudo-terminal device could not be accessed.
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.sp
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.LP
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\fIThe following sections are informative.\fP
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.SH EXAMPLES
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.LP
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None.
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.SH APPLICATION USAGE
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.LP
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None.
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.SH RATIONALE
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.LP
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None.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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2007-09-20 06:11:55 +00:00
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\fIopen\fP(), \fIptsname\fP(), \fIunlockpt\fP(), the Base Definitions
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2004-11-03 13:51:07 +00:00
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volume of IEEE\ Std\ 1003.1-2001, \fI<stdlib.h>\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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