static void
copy_hw_info(char *buf, size_t len) {
int i;
buf[0] = '\0';
for (i = 0; i < sizeof(dmidecode_param) / sizeof(dmidecode_param[0]); i++) {
strncat(buf, get_dmi_string(dmidecode_param[i]), len);
buf[strlen(buf) - 1] = ' ';
}
buf[strlen(buf) - 1] = '\0';
}
static int get_dmi_info(char *buf, int bufsize, int flags)
{
int ret = SYSINFO_RET_FAIL, fd, offset = 0;
unsigned char membuf[SMBIOS_ENTRY_POINT_SIZE], *smbuf = NULL, *data;
size_t len, fp;
void *mmp = NULL;
static long pagesize = 0;
static int smbios_status = SMBIOS_STATUS_UNKNOWN;
static size_t smbios_len, smbios; /* length and address of SMBIOS table (if found) */
if (-1 == (fd = open(DEV_MEM, O_RDONLY)))
return ret;
if (SMBIOS_STATUS_UNKNOWN == smbios_status) /* look for SMBIOS table only once */
{
pagesize = sysconf(_SC_PAGESIZE);
/* find smbios entry point - located between 0xF0000 and 0xFFFFF (according to the specs) */
for (fp = 0xf0000; 0xfffff > fp; fp += 16)
{
memset(membuf, 0, sizeof(membuf));
len = fp % pagesize; /* mmp needs to be a multiple of pagesize for munmap */
if (MAP_FAILED == (mmp = mmap(0, len + SMBIOS_ENTRY_POINT_SIZE, PROT_READ, MAP_SHARED, fd, fp - len)))
goto close;
memcpy(membuf, mmp + len, sizeof(membuf));
munmap(mmp, len + SMBIOS_ENTRY_POINT_SIZE);
if (0 == strncmp((char *)membuf, "_DMI_", 5)) /* entry point found */
{
smbios_len = membuf[7] << 8 | membuf[6];
smbios = (size_t)membuf[11] << 24 | (size_t)membuf[10] << 16 | (size_t)membuf[9] << 8 | membuf[8];
smbios_status = SMBIOS_STATUS_OK;
break;
}
}
}
if (SMBIOS_STATUS_OK != smbios_status)
{
smbios_status = SMBIOS_STATUS_ERROR;
goto close;
}
smbuf = zbx_malloc(smbuf, smbios_len);
len = smbios % pagesize; /* mmp needs to be a multiple of pagesize for munmap */
if (MAP_FAILED == (mmp = mmap(0, len + smbios_len, PROT_READ, MAP_SHARED, fd, smbios - len)))
goto clean;
memcpy(smbuf, mmp + len, smbios_len);
munmap(mmp, len + smbios_len);
data = smbuf;
while (data + DMI_HEADER_SIZE <= smbuf + smbios_len)
{
if (1 == data[0]) /* system information */
{
if (0 != (flags & DMI_GET_VENDOR))
{
offset += get_dmi_string(buf + offset, bufsize - offset, data, data[4]);
flags &= ~DMI_GET_VENDOR;
}
if (0 != (flags & DMI_GET_MODEL))
{
offset += get_dmi_string(buf + offset, bufsize - offset, data, data[5]);
flags &= ~DMI_GET_MODEL;
}
if (0 != (flags & DMI_GET_SERIAL))
{
offset += get_dmi_string(buf + offset, bufsize - offset, data, data[7]);
flags &= ~DMI_GET_SERIAL;
}
}
else if (3 == data[0] && 0 != (flags & DMI_GET_TYPE)) /* chassis */
{
offset += get_chassis_type(buf + offset, bufsize - offset, data[5]);
flags &= ~DMI_GET_TYPE;
}
if (0 == flags)
break;
data += data[1]; /* skip the main data */
while (0 != data[0] || 0 != data[1]) /* string data ends with two nulls */
{
data++;
}
data += 2;
}
if (0 < offset)
ret = SYSINFO_RET_OK;
clean:
zbx_free(smbuf);
close:
close(fd);
return ret;
}
