VSPRINTF(9) Basic C Library Functions VSPRINTF(9)NAMEvsprintf - Format a string and place it in a buffer
SYNOPSIS
int vsprintf(char * buf, const char * fmt, va_list args);
ARGUMENTS
buf
The buffer to place the result into
fmt
The format string to use
args
Arguments for the format string
DESCRIPTION
The function returns the number of characters written into buf. Use
vsnprintf or vscnprintf in order to avoid buffer overflows.
Call this function if you are already dealing with a va_list. You
probably want sprintf instead.
See the vsnprintf documentation for format string extensions over C99.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 VSPRINTF(9)