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-rw-r--r--src/libstore/local-store.cc25
1 files changed, 14 insertions, 11 deletions
diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index 3ad80bc4e6f4..bc792baf296b 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -256,20 +256,23 @@ LocalStore::LocalStore(bool reserveSpace)
         if (chmod(perUserDir.c_str(), 01777) == -1)
             throw SysError(format("could not set permissions on ‘%1%’ to 1777") % perUserDir);
 
+        mode_t perm = 01735;
+
         struct group * gr = getgrnam(settings.buildUsersGroup.c_str());
         if (!gr)
-            throw Error(format("the group ‘%1%’ specified in ‘build-users-group’ does not exist")
+            printMsg(lvlError, format("warning: the group ‘%1%’ specified in ‘build-users-group’ does not exist")
                 % settings.buildUsersGroup);
-
-        struct stat st;
-        if (stat(settings.nixStore.c_str(), &st))
-            throw SysError(format("getting attributes of path ‘%1%’") % settings.nixStore);
-
-        if (st.st_uid != 0 || st.st_gid != gr->gr_gid || (st.st_mode & ~S_IFMT) != 01775) {
-            if (chown(settings.nixStore.c_str(), 0, gr->gr_gid) == -1)
-                throw SysError(format("changing ownership of path ‘%1%’") % settings.nixStore);
-            if (chmod(settings.nixStore.c_str(), 01775) == -1)
-                throw SysError(format("changing permissions on path ‘%1%’") % settings.nixStore);
+        else {
+            struct stat st;
+            if (stat(settings.nixStore.c_str(), &st))
+                throw SysError(format("getting attributes of path ‘%1%’") % settings.nixStore);
+
+            if (st.st_uid != 0 || st.st_gid != gr->gr_gid || (st.st_mode & ~S_IFMT) != perm) {
+                if (chown(settings.nixStore.c_str(), 0, gr->gr_gid) == -1)
+                    throw SysError(format("changing ownership of path ‘%1%’") % settings.nixStore);
+                if (chmod(settings.nixStore.c_str(), perm) == -1)
+                    throw SysError(format("changing permissions on path ‘%1%’") % settings.nixStore);
+            }
         }
     }