mirror of https://github.com/mkerrisk/man-pages
72 lines
2.4 KiB
Plaintext
72 lines
2.4 KiB
Plaintext
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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.TH "PTSNAME" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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.\" ptsname
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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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.SH NAME
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ptsname \- get name of 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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char *ptsname(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 \fIptsname\fP() function shall return the name of the slave pseudo-terminal
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device associated with a master pseudo-terminal
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device. The \fIfildes\fP argument is a file descriptor that refers
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to the master device. The \fIptsname\fP() function shall
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return a pointer to a string containing the pathname of the corresponding
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slave device.
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.LP
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The \fIptsname\fP() function need not be reentrant. A function that
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is not required to be reentrant is not required to be
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thread-safe.
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.SH RETURN VALUE
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.LP
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Upon successful completion, \fIptsname\fP() shall return a pointer
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to a string which is the name of the pseudo-terminal slave
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device. Upon failure, \fIptsname\fP() shall return a null pointer.
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This could occur if \fIfildes\fP is an invalid file descriptor
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or if the slave device name does not exist in the file system.
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.SH ERRORS
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.LP
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No errors are defined.
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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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The value returned may point to a static data area that is overwritten
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by each call to \fIptsname\fP().
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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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\fIgrantpt\fP(), \fIopen\fP(), \fIttyname\fP(), \fIunlockpt\fP(),
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the Base Definitions volume of
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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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