man FcStrCopyFilename (Fonctions bibliothèques) - copy a string, expanding '~'
NAME
FcStrCopyFilename - copy a string, expanding '~'
SYNOPSIS
#include <fontconfig.h> FcChar8 * FcStrCopyFilename (const FcChar8 *s);
DESCRIPTION
Just like FcStrCopy except that it converts any leading '~' characters in s to the value of the HOME environment variable. Returns NULL if '~' is present in s and HOME is unset.
VERSION
Fontconfig version 2.3.2