diff options
Diffstat (limited to 'src/libstore/lock.cc')
| -rw-r--r-- | src/libstore/lock.cc | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/src/libstore/lock.cc b/src/libstore/lock.cc index 3b93979a8..7459d837d 100644 --- a/src/libstore/lock.cc +++ b/src/libstore/lock.cc @@ -71,21 +71,22 @@ struct SimpleUserLock : UserLock user. This is usually either empty or contains a group such as "kvm". */ int ngroups = 32; // arbitrary initial guess - lock->supplementaryGIDs.resize(ngroups); + std::vector<gid_t> gids; + gids.resize(ngroups); int err = getgrouplist( pw->pw_name, pw->pw_gid, - lock->supplementaryGIDs.data(), + gids.data(), &ngroups); /* Our initial size of 32 wasn't sufficient, the correct size has been stored in ngroups, so we try again. */ if (err == -1) { - lock->supplementaryGIDs.resize(ngroups); + gids.resize(ngroups); err = getgrouplist( pw->pw_name, pw->pw_gid, - lock->supplementaryGIDs.data(), + gids.data(), &ngroups); } @@ -94,7 +95,9 @@ struct SimpleUserLock : UserLock throw Error("failed to get list of supplementary groups for '%s'", pw->pw_name); // Finally, trim back the GID list to its real size. - lock->supplementaryGIDs.resize(ngroups); + for (auto i = 0; i < ngroups; i++) + if (gids[i] != lock->gid) + lock->supplementaryGIDs.push_back(gids[i]); #endif return lock; |