+static int putgrent_with_members(const struct group *gr, FILE *group) {
+ char **a;
+
+ assert(gr);
+ assert(group);
+
+ a = hashmap_get(members, gr->gr_name);
+ if (a) {
+ _cleanup_strv_free_ char **l = NULL;
+ bool added = false;
+ char **i;
+
+ l = strv_copy(gr->gr_mem);
+ if (!l)
+ return -ENOMEM;
+
+ STRV_FOREACH(i, a) {
+ if (strv_find(l, *i))
+ continue;
+
+ if (strv_extend(&l, *i) < 0)
+ return -ENOMEM;
+
+ added = true;
+ }
+
+ if (added) {
+ struct group t;
+
+ strv_uniq(l);
+ strv_sort(l);
+
+ t = *gr;
+ t.gr_mem = l;
+
+ errno = 0;
+ if (putgrent(&t, group) != 0)
+ return errno ? -errno : -EIO;
+
+ return 1;
+ }
+ }
+
+ errno = 0;
+ if (putgrent(gr, group) != 0)
+ return errno ? -errno : -EIO;
+
+ return 0;
+}
+
+static int putsgent_with_members(const struct sgrp *sg, FILE *gshadow) {
+ char **a;
+
+ assert(sg);
+ assert(gshadow);
+
+ a = hashmap_get(members, sg->sg_namp);
+ if (a) {
+ _cleanup_strv_free_ char **l = NULL;
+ bool added = false;
+ char **i;
+
+ l = strv_copy(sg->sg_mem);
+ if (!l)
+ return -ENOMEM;
+
+ STRV_FOREACH(i, a) {
+ if (strv_find(l, *i))
+ continue;
+
+ if (strv_extend(&l, *i) < 0)
+ return -ENOMEM;
+
+ added = true;
+ }
+
+ if (added) {
+ struct sgrp t;
+
+ strv_uniq(l);
+ strv_sort(l);
+
+ t = *sg;
+ t.sg_mem = l;
+
+ errno = 0;
+ if (putsgent(&t, gshadow) != 0)
+ return errno ? -errno : -EIO;
+
+ return 1;
+ }
+ }
+
+ errno = 0;
+ if (putsgent(sg, gshadow) != 0)
+ return errno ? -errno : -EIO;
+
+ return 0;
+}
+
+static int sync_rights(FILE *from, FILE *to) {
+ struct stat st;
+
+ if (fstat(fileno(from), &st) < 0)
+ return -errno;
+
+ if (fchmod(fileno(to), st.st_mode & 07777) < 0)
+ return -errno;
+
+ if (fchown(fileno(to), st.st_uid, st.st_gid) < 0)
+ return -errno;
+
+ return 0;
+}
+