Replaced setgid() calls with setegid() so that it works with dot

locking on FreeBSD.  setegid() should be supported on modern POSIX
systems.

diff --git a/uip/inc.c b/uip/inc.c
index 8a05c6a..33672de 100644 (file)
--- a/uip/inc.c
+++ b/uip/inc.c
@@ -97,8 +97,16 @@ static int return_gid;
 ** easy case; we're not setuid root, so can drop group privs immediately.
 */
 #define TRYDROPGROUPPRIVS() DROPGROUPPRIVS()
-#define DROPGROUPPRIVS() setgid(getgid())
-#define GETGROUPPRIVS() setgid(return_gid)
+#define DROPGROUPPRIVS() \
+    if (setegid(getgid()) != 0) { \
+        advise ("setegid", "unable to set group to %ld", (long) getgid()); \
+               _exit (-1); \
+    }
+#define GETGROUPPRIVS() \
+    if (setegid(return_gid) != 0) { \
+        advise ("setegid", "unable to set group to %ld", (long) return_gid); \
+               _exit (-1); \
+    }
 #define SAVEGROUPPRIVS() return_gid = getegid()
 #else
 /* define *GROUPPRIVS() as null; this avoids having lots of "#ifdef MAILGROUP"s */