HelenOS sources

vsscanf            56 uspace/lib/c/generic/stdio/sscanf.c 	rc = vsscanf(s, fmt, args);
vsscanf           158 uspace/lib/c/include/stdio.h extern int vsscanf(const char *, const char *, va_list);
vsscanf           158 uspace/lib/posix/include/libc/stdio.h extern int vsscanf(const char *, const char *, va_list);