frysk-fcstrcopyfilename(3) - Linux man page
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 2.4.2