More secure setgroups functions. (thanks muh)

1 files changed, 6 insertions, 2 deletions

diff --git a/src/libstddjb/setgroups.c b/src/libstddjb/setgroups.c
index c7610ab..d064ed2 100644
--- a/src/libstddjb/setgroups.c
+++ b/src/libstddjb/setgroups.c
@@ -10,10 +10,9 @@
 #include <grp.h>
 #include <skalibs/setgroups.h>
 
-int setgroups_with_egid (size_t n, gid_t const *tab)
+int setgroups_and_gid (gid_t g, size_t n, gid_t const *tab)
 {
   size_t i = 1 ;
-  gid_t g = getegid() ;
   if (!n) return setgroups(1, &g) ;
   if (tab[0] == g) return setgroups(n, tab) ;
   for (; i < n ; i++) if (tab[i] == g) break ;
@@ -34,6 +33,11 @@ int setgroups_with_egid (size_t n, gid_t const *tab)
   }
 }
 
+int setgroups_with_egid (size_t n, gid_t const *tab)
+{
+  return setgroups_and_gid(getegid(), n, tab) ;
+}
+
 int skalibs_setgroups (size_t n, gid_t const *tab)
 {
 #ifdef SKALIBS_BSD_SUCKS