status_t ExtractQueryVolumes(BNode *node, vollist *volumes) {
int32 length = 0;
char *attr = ReadAttribute(*node, kTrackerQueryVolume, &length);
BVolumeRoster roster;
if (attr == NULL) {
roster.Rewind();
BVolume vol;
while (roster.GetNextVolume(&vol) == B_NO_ERROR) {
if ((vol.IsPersistent() == true) && (vol.KnowsQuery() == true)) {
volumes->push_back(vol);
};
};
} else {
BMessage msg;
msg.Unflatten(attr);
// !*YOINK*!d from that project... with the funny little doggie as a logo...
// OpenTracker, that's it!
time_t created;
off_t capacity;
for (int32 index = 0; msg.FindInt32("creationDate", index, &created) == B_OK;
index++) {
if ((msg.FindInt32("creationDate", index, &created) != B_OK)
|| (msg.FindInt64("capacity", index, &capacity) != B_OK))
return B_ERROR;
BVolume volume;
BString deviceName = "";
BString volumeName = "";
BString fshName = "";
if (msg.FindString("deviceName", &deviceName) == B_OK
&& msg.FindString("volumeName", &volumeName) == B_OK
&& msg.FindString("fshName", &fshName) == B_OK) {
// New style volume identifiers: We have a couple of characteristics,
// and compute a score from them. The volume with the greatest score
// (if over a certain threshold) is the one we're looking for. We
// pick the first volume, in case there is more than one with the
// same score.
int foundScore = -1;
roster.Rewind();
char name[B_FILE_NAME_LENGTH];
while (roster.GetNextVolume(&volume) == B_OK) {
if (volume.IsPersistent() && volume.KnowsQuery()) {
// get creation time and fs_info
BDirectory root;
volume.GetRootDirectory(&root);
time_t cmpCreated;
fs_info info;
if (root.GetCreationTime(&cmpCreated) == B_OK
&& fs_stat_dev(volume.Device(), &info) == 0) {
// compute the score
int score = 0;
// creation time
if (created == cmpCreated)
score += 5;
// capacity
if (capacity == volume.Capacity())
score += 4;
// device name
if (deviceName == info.device_name)
score += 3;
// volume name
if (volumeName == info.volume_name)
score += 2;
// fsh name
if (fshName == info.fsh_name)
score += 1;
// check score
if (score >= 9 && score > foundScore) {
volume.GetName(name);
volumes->push_back(volume);
}
}
}
}
} else {
// Old style volume identifiers: We have only creation time and
// capacity. Both must match.
roster.Rewind();
while (roster.GetNextVolume(&volume) == B_OK)
if (volume.IsPersistent() && volume.KnowsQuery()) {
BDirectory root;
volume.GetRootDirectory(&root);
time_t cmpCreated;
root.GetCreationTime(&cmpCreated);
if (created == cmpCreated && capacity == volume.Capacity()) {
volumes->push_back(volume);
}
}
}
};
};
return B_OK;
};
