HelenOS sources

vfprintf           70 uspace/app/untar/main.c 	vfprintf(stderr, fmt, args);
vfprintf           51 uspace/lib/c/generic/io/printf.c 	int ret = vfprintf(stream, fmt, args);
vfprintf          105 uspace/lib/c/generic/io/vprintf.c 	return vfprintf(stdout, fmt, ap);
vfprintf          133 uspace/lib/c/include/stdio.h extern int vfprintf(FILE *, const char *, va_list);
vfprintf          133 uspace/lib/posix/include/libc/stdio.h extern int vfprintf(FILE *, const char *, va_list);