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hostnamed: filter out all-zero and all-0xFF DMI ProductUUIDs

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These UUIDs are considered as wildcard value for "unset" UUIDs
typically, and this even makes sense. Let's suppress them hence.
This commit is contained in:
Lennart Poettering 2018-12-12 20:40:12 +01:00
parent 670814387b
commit 6839aa567c
1 changed files with 6 additions and 2 deletions
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8
src/hostname/hostnamed.c
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@ -113,8 +113,12 @@ static int context_read_data(Context *c) {
r = id128_read("/sys/class/dmi/id/product_uuid", ID128_UUID, &c->uuid);
if (r < 0)
log_info_errno(r, "Failed to read product UUID, ignoring: %m");
c->has_uuid = (r >= 0);
log_full_errno(r == -ENOENT ? LOG_DEBUG : LOG_WARNING, r,
"Failed to read product UUID, ignoring: %m");
else if (sd_id128_is_null(c->uuid) || sd_id128_is_allf(c->uuid))
log_debug("DMI product UUID " SD_ID128_FORMAT_STR " is all 0x00 or all 0xFF, ignoring.", SD_ID128_FORMAT_VAL(c->uuid));
else
c->has_uuid = true;
return 0;
}