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vfprintf(3p) — Linux manual page

VFPRINTF(3P)            POSIX Programmer's ManualVFPRINTF(3P)

PROLOG        top

       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.

NAME        top

       vdprintf, vfprintf, vprintf, vsnprintf, vsprintf — format output       of a stdarg argument list

SYNOPSIS        top

       #include <stdarg.h>       #include <stdio.h>       int vdprintf(intfildes, const char *restrictformat, va_listap);       int vfprintf(FILE *restrictstream, const char *restrictformat,           va_listap);       int vprintf(const char *restrictformat, va_listap);       int vsnprintf(char *restricts, size_tn, const char *restrictformat,           va_listap);       int vsprintf(char *restricts, const char *restrictformat, va_listap);

DESCRIPTION        top

       The functionality described on this reference page is aligned with       the ISO C standard. Any conflict between the requirements       described here and the ISO C standard is unintentional. This       volume of POSIX.1‐2017 defers to the ISO C standard.       Thevdprintf(),vfprintf(),vprintf(),vsnprintf(), andvsprintf()       functions shall be equivalent to thedprintf(),fprintf(),printf(),snprintf(), andsprintf() functions respectively, except       that instead of being called with a variable number of arguments,       they are called with an argument list as defined by<stdarg.h>.       These functions shall not invoke theva_end macro. As these       functions invoke theva_arg macro, the value ofap after the       return is unspecified.

RETURN VALUE        top

       Refer tofprintf(3p).

ERRORS        top

       Refer tofprintf(3p).The following sections are informative.

EXAMPLES        top

       None.

APPLICATION USAGE        top

       Applications using these functions should callva_end(ap)       afterwards to clean up.

RATIONALE        top

       None.

FUTURE DIRECTIONS        top

       None.

SEE ALSO        top

Section 2.5,Standard I/O Streams,fprintf(3p)       The Base Definitions volume of POSIX.1‐2017,stdarg.h(0p),stdio.h(0p)

COPYRIGHT        top

       Portions of this text are reprinted and reproduced in electronic       form from IEEE Std 1003.1-2017, Standard for Information       Technology -- Portable Operating System Interface (POSIX), The       Open Group Base Specifications Issue 7, 2018 Edition, Copyright       (C) 2018 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 athttp://www.opengroup.org/unix/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, seehttps://www.kernel.org/doc/man-pages/reporting_bugs.html .IEEE/The Open Group                2017VFPRINTF(3P)

Pages that refer to this page:stdio.h(0p), stdin(3p), vprintf(3p), vsnprintf(3p)

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