1 files changed, 21 insertions, 0 deletions

diff --git a/prot.c b/prot.c
new file mode 100644
index 0000000..79a88c5
--- /dev/null
+++ b/prot.c
@@ -0,0 +1,21 @@
+/* Public domain. */
+
+#include "hasshsgr.h"
+#include "prot.h"
+
+int prot_gid(int gid)
+{
+#ifdef HASSHORTSETGROUPS
+  short x[2];
+  x[0] = gid; x[1] = 73; /* catch errors */
+  if (setgroups(1,x) == -1) return -1;
+#else
+  if (setgroups(1,&gid) == -1) return -1;
+#endif
+  return setgid(gid); /* _should_ be redundant, but on some systems it isn't */
+}
+
+int prot_uid(int uid)
+{
+  return setuid(uid);
+}