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#include "entCache.h"
#include <exceptions.h>
#include <lockHelpers.h>
#include <pwd.h>
#include <grp.h>
#include <visibility.h>
template<class entry_t>
EntCache<entry_t>::EntCache() :
fillTime(0)
{
}
template<class entry_t>
EntCache<entry_t>::~EntCache()
{
}
template<class entry_t>
void
EntCache<entry_t>::getID(const EntCache<entry_t>::name_t & u, EntCache<entry_t>::id_t * target) const
{
auto e = getEntry(u);
*target = e->id;
}
template<class entry_t>
void
EntCache<entry_t>::getName(const EntCache<entry_t>::id_t & u, EntCache<entry_t>::name_t * target) const
{
auto e = getEntry(u);
*target = e->name;
}
template<class entry_t>
template<class key_t>
typename EntCache<entry_t>::entry_ptr
EntCache<entry_t>::getEntry(const key_t & key) const
{
typename EntCache<entry_t>::entry_ptr ent;
if (fillTime + 60 > time(NULL)) {
ent = getEntryNoFill<key_t>(key);
}
if (!ent) {
fillCache();
ent = getEntryNoFill<key_t>(key);
}
if (!ent) {
throw NetFS::SystemError(EPERM);
}
return ent;
}
template<class entry_t>
template<class key_t>
typename EntCache<entry_t>::entry_ptr
EntCache<entry_t>::getEntryNoFill(const key_t & key) const
{
SharedLock(lock);
auto & collection = idcache.template get<key_t>();
auto i = collection.find(key);
if (i != collection.end()) {
return *i;
}
return NULL;
}
User::User(uid_t u, const std::string & n, gid_t g) :
id(u),
name(n),
group(g)
{
}
const int BUFLEN = 8196;
template<>
void
EntCache<User>::fillCache() const
{
Lock(lock);
setpwent();
idcache.clear();
char buf[BUFLEN];
struct passwd pwbuf, * pwp;
while (getpwent_r(&pwbuf, buf, BUFLEN, &pwp) == 0) {
idcache.insert(new User(pwp->pw_uid, pwp->pw_name, pwp->pw_gid));
}
endpwent();
time(&fillTime);
}
Group::Group(gid_t g, const std::string & n) :
id(g),
name(n)
{
}
template<>
void
EntCache<Group>::fillCache() const
{
Lock(lock);
setgrent();
char buf[BUFLEN];
idcache.clear();
struct group grpbuf, * grp;
EntCache<User> instance;
while (getgrent_r(&grpbuf, buf, BUFLEN, &grp) == 0) {
auto g = new Group(grp->gr_gid, grp->gr_name);
for (auto member = grp->gr_mem; *member; member++) {
try {
g->members.insert(instance.getEntry((const name_t &)*member)->id);
}
catch (const NetFS::SystemError &) {
}
}
idcache.insert(g);
}
endgrent();
time(&fillTime);
}
bool
DLL_PUBLIC Group::hasMember(uid_t u) const
{
return (members.find(u) != members.end());
}
template DLL_PUBLIC EntCache<User>::EntCache();
template DLL_PUBLIC EntCache<User>::~EntCache();
template IceUtil::Handle<User> DLL_PUBLIC EntCache<User>::getEntry<std::string>(const std::string &) const;
template IceUtil::Handle<User> DLL_PUBLIC EntCache<User>::getEntry<uid_t>(const uid_t &) const;
template DLL_PUBLIC void EntCache<User>::getName(const gid_t &, std::string *) const;
template DLL_PUBLIC void EntCache<User>::getID(const std::string &, gid_t *) const;
template DLL_PUBLIC EntCache<Group>::EntCache();
template DLL_PUBLIC EntCache<Group>::~EntCache();
template IceUtil::Handle<Group> DLL_PUBLIC EntCache<Group>::getEntry<std::string>(const std::string &) const;
template IceUtil::Handle<Group> DLL_PUBLIC EntCache<Group>::getEntry<gid_t>(const gid_t &) const;
template DLL_PUBLIC void EntCache<Group>::getName(const gid_t &, std::string *) const;
template DLL_PUBLIC void EntCache<Group>::getID(const std::string &, gid_t *) const;
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