vasprintf (3) Linux Manual Page

asprintf, vasprintf – print to allocated string

Synopsis

#define _GNU_SOURCE /* See feature_test_macros(7) */

#include <stdio.h>
int asprintf(char **strp, const char *fmt, ...);
int vasprintf(char **strp, const char *fmt, va_list ap);

Description

The functions asprintf() and vasprintf() are analogs of sprintf(3) and vsprintf(3), except that they allocate a string large enough to hold the output including the terminating null byte (‘