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+'\" et
+.TH GRANTPT "3P" 2013 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.SH 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.
+
+.SH NAME
+grantpt
+\(em grant access to the slave pseudo-terminal device
+.SH SYNOPSIS
+.LP
+.nf
+#include <stdlib.h>
+.P
+int grantpt(int \fIfildes\fP);
+.fi
+.SH DESCRIPTION
+The
+\fIgrantpt\fR()
+function shall change the mode and ownership of the slave pseudo-terminal
+device associated with its master pseudo-terminal counterpart. The
+.IR 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.
+.P
+The behavior of the
+\fIgrantpt\fR()
+function is unspecified if the application has installed a signal
+handler to catch SIGCHLD signals.
+.SH "RETURN VALUE"
+Upon successful completion,
+\fIgrantpt\fR()
+shall return 0; otherwise, it shall return \(mi1 and set
+.IR errno
+to indicate the error.
+.SH ERRORS
+The
+\fIgrantpt\fR()
+function may fail if:
+.TP
+.BR EBADF
+The
+.IR fildes
+argument is not a valid open file descriptor.
+.TP
+.BR EINVAL
+The
+.IR fildes
+argument is not associated with a master pseudo-terminal device.
+.TP
+.BR EACCES
+The corresponding slave pseudo-terminal device could not be accessed.
+.LP
+.IR "The following sections are informative."
+.SH EXAMPLES
+None.
+.SH "APPLICATION USAGE"
+None.
+.SH RATIONALE
+See the RATIONALE section for
+.IR "\fIposix_openpt\fR\^(\|)".
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+.IR "\fIopen\fR\^(\|)",
+.IR "\fIposix_openpt\fR\^(\|)",
+.IR "\fIptsname\fR\^(\|)",
+.IR "\fIunlockpt\fR\^(\|)"
+.P
+The Base Definitions volume of POSIX.1\(hy2008,
+.IR "\fB<stdlib.h>\fP"
+.SH COPYRIGHT
+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 .