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vsnprintf(9) - phpMan

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VSNPRINTF(9)                        Basic C Library Functions                        VSNPRINTF(9)



NAME
       vsnprintf - Format a string and place it in a buffer

SYNOPSIS
       int vsnprintf(char * buf, size_t size, const char * fmt, va_list args);

ARGUMENTS
       buf
           The buffer to place the result into

       size
           The size of the buffer, including the trailing null space

       fmt
           The format string to use

       args
           Arguments for the format string

DESCRIPTION
       This function generally follows C99 vsnprintf, but has some extensions and a few
       limitations:

       n is unsupported p* is handled by pointer

       See pointer or Documentation/printk-formats.txt for more extensive description.

       ** Please update the documentation in both places when making changes **

       The return value is the number of characters which would be generated for the given input,
       excluding the trailing '\0', as per ISO C99. If you want to have the exact number of
       characters written into buf as return value (not including the trailing '\0'), use
       vscnprintf. If the return is greater than or equal to size, the resulting string is
       truncated.

       If you're not already dealing with a va_list consider using snprintf.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                              VSNPRINTF(9)


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