void Channel::get_subchannel_names(KVS &kvs, int owner_id,
const std::string &prefix,
std::vector<std::string> &names,
unsigned int nlevels) {
std::string kvs_prefix = string_printf("%d", owner_id);
if (prefix != "") kvs_prefix += "." + prefix;
std::vector<std::string> keys;
kvs.get_subkeys(kvs_prefix, keys, nlevels, not_all_digits_filter);
for (unsigned i = 0; i < keys.size(); i++) {
if (filename_suffix(keys[i]) == "info") {
std::string name_with_uid = filename_sans_suffix(keys[i]);
tassert(strchr(name_with_uid.c_str(), '.'));
names.push_back(1+strchr(name_with_uid.c_str(), '.'));
}
}
}
/// Get subkeys
/// \param key
/// \param nlevels: 1=only return immediate children; 2=children and grandchildren; (unsigned int) -1: all children
/// \return All subkeys, recursively
void FilesystemKVS::get_subkeys(const std::string &key, std::vector<std::string> &keys,
unsigned int nlevels, bool (*subdir_filter)(const char *subdirname)) const {
std::string path = directory_key_to_path(key);
std::string prefix = (key == "") ? "" : key+".";
DIR *dir = opendir(path.c_str());
if (!dir) return;
while (1) {
struct dirent *ent = readdir(dir);
if (!ent) break;
if (!strcmp(ent->d_name, ".")) continue;
if (!strcmp(ent->d_name, "..")) continue;
if (filename_suffix(ent->d_name) == "val") {
keys.push_back(prefix+filename_sans_suffix(ent->d_name));
} else if (nlevels > 1 && (!subdir_filter || (*subdir_filter)(ent->d_name))) {
// If it's a directory, recurse, honoring symlinks
bool is_directory = false;
std::string fullpath = path+"/"+ent->d_name;
switch (ent->d_type) {
case DT_DIR:
is_directory = true;
break;
case DT_UNKNOWN:
case DT_LNK: {
struct stat statbuf;
int ret = stat(fullpath.c_str(), &statbuf);
if (ret != 0) {
perror(("stat " + fullpath).c_str());
} else {
is_directory = S_ISDIR(statbuf.st_mode);
}
}
}
if (is_directory) get_subkeys(prefix+ent->d_name, keys, nlevels-1);
}
}
closedir(dir);
}
