VF_PREFIX
snprintf(device_name, sizeof(device_name), VF_PREFIX"%d", i);
snprintf(device, sizeof(device), VF_PREFIX"%d", i);
if (strncasecmp(name, VF_PREFIX, VF_PREFIX_LEN) != 0)
regex_err = regcomp(&vf_pat, "^"VF_PREFIX"([1-9][0-9]*|0)$",
snprintf(device_name, sizeof(device_name), VF_PREFIX"%d",