buf_read_file
rc = buf_read_file(f, &buf, &buf_size);
error = buf_read_file(f, &buf, &buf_size);
static int buf_read_file(struct open_file *f, char **buf_p,
static int buf_read_file(struct open_file *, char **, size_t *);
rc = buf_read_file(f, &buf, &buf_size);
rc = buf_read_file(f, &buf, &buf_size);
error = buf_read_file(f, &buf, &buf_size);