- /* Save the current euid, and egroups. */
- saved_euid = geteuid();
- debug("temporarily_use_uid: %d/%d (e=%d)",
- pw->pw_uid, pw->pw_gid, saved_euid);
- if (saved_euid != 0) {
- privileged = 0;
- return;
- }
- privileged = 1;
- temporarily_use_uid_effective = 1;
- saved_egid = getegid();
- saved_egroupslen = getgroups(NGROUPS_MAX, saved_egroups);
- if (saved_egroupslen < 0)
- fatal("getgroups: %.100s", strerror(errno));
-
- /* set and save the user's groups */
- if (user_groupslen == -1) {
- if (initgroups(pw->pw_name, pw->pw_gid) < 0)
- fatal("initgroups: %s: %.100s", pw->pw_name,
- strerror(errno));
- user_groupslen = getgroups(NGROUPS_MAX, user_groups);
- if (user_groupslen < 0)
- fatal("getgroups: %.100s", strerror(errno));
- }
- /* Set the effective uid to the given (unprivileged) uid. */
- if (setgroups(user_groupslen, user_groups) < 0)
+ /* Save the current euid, and egroups. */
+#ifdef SAVED_IDS_WORK_WITH_SETEUID
+ saved_euid = geteuid();
+ saved_egid = getegid();
+ debug("temporarily_use_uid: %u/%u (e=%u/%u)",
+ (u_int)pw->pw_uid, (u_int)pw->pw_gid,
+ (u_int)saved_euid, (u_int)saved_egid);
+#ifndef HAVE_CYGWIN
+ if (saved_euid != 0) {
+ privileged = 0;
+ return;
+ }
+#endif
+#else
+ if (geteuid() != 0) {
+ privileged = 0;
+ return;
+ }
+#endif /* SAVED_IDS_WORK_WITH_SETEUID */
+
+ privileged = 1;
+ temporarily_use_uid_effective = 1;
+
+ saved_egroupslen = getgroups(0, NULL);
+ if (saved_egroupslen < 0)
+ fatal("getgroups: %.100s", strerror(errno));
+ if (saved_egroupslen > 0) {
+ saved_egroups = xrealloc(saved_egroups,
+ saved_egroupslen, sizeof(gid_t));
+ if (getgroups(saved_egroupslen, saved_egroups) < 0)
+ fatal("getgroups: %.100s", strerror(errno));
+ } else { /* saved_egroupslen == 0 */
+ if (saved_egroups != NULL)
+ xfree(saved_egroups);
+ }
+
+ /* set and save the user's groups */
+ if (user_groupslen == -1) {
+ if (initgroups(pw->pw_name, pw->pw_gid) < 0)
+ fatal("initgroups: %s: %.100s", pw->pw_name,
+ strerror(errno));
+
+ user_groupslen = getgroups(0, NULL);
+ if (user_groupslen < 0)
+ fatal("getgroups: %.100s", strerror(errno));
+ if (user_groupslen > 0) {
+ user_groups = xrealloc(user_groups,
+ user_groupslen, sizeof(gid_t));
+ if (getgroups(user_groupslen, user_groups) < 0)
+ fatal("getgroups: %.100s", strerror(errno));
+ } else { /* user_groupslen == 0 */
+ if (user_groups)
+ xfree(user_groups);
+ }
+ }
+ /* Set the effective uid to the given (unprivileged) uid. */
+ if (setgroups(user_groupslen, user_groups) < 0)