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 "VFPRINTF" 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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.\" vfprintf
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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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vfprintf, vprintf, vsnprintf, vsprintf \- format output of a stdarg
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argument list
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.SH SYNOPSIS
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.LP
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\fB#include <stdarg.h>
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.br
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#include <stdio.h>
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.br
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.sp
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int vfprintf(FILE *restrict\fP \fIstream\fP\fB, const char *restrict\fP
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\fIformat\fP\fB,
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.br
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\ \ \ \ \ \ va_list\fP \fIap\fP\fB);
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.br
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int vprintf(const char *restrict\fP \fIformat\fP\fB, va_list\fP \fIap\fP\fB);
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.br
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int vsnprintf(char *restrict\fP \fIs\fP\fB, size_t\fP \fIn\fP\fB,
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const char *restrict\fP \fIformat\fP\fB,
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.br
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\ \ \ \ \ \ va_list\fP \fIap\fP\fB);
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.br
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int vsprintf(char *restrict\fP \fIs\fP\fB, const char *restrict\fP
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\fIformat\fP\fB, va_list\fP \fIap\fP\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 \fIvprintf\fP(), \fIvfprintf\fP(), \fIvsnprintf\fP(), and \fIvsprintf\fP()
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functions shall be equivalent to \fIprintf\fP(), \fIfprintf\fP(),
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\fIsnprintf\fP(), and \fIsprintf\fP() respectively,
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except that instead of being called with a variable number of arguments,
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they are called with an argument list as defined by \fI<stdarg.h>\fP.
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.LP
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These functions shall not invoke the \fIva_end\fP macro. As these
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functions invoke the \fIva_arg\fP macro, the value of
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\fIap\fP after the return is unspecified.
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.SH RETURN VALUE
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.LP
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Refer to \fIfprintf\fP() .
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.SH ERRORS
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.LP
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Refer to \fIfprintf\fP() .
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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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Applications using these functions should call \fIva_end\fP(\fIap\fP)
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afterwards to clean up.
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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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\fIfprintf\fP(), the Base Definitions volume of IEEE\ Std\ 1003.1-2001,
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2004-11-03 13:51:07 +00:00
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\fI<stdarg.h>\fP, \fI<stdio.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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