1 files changed, 17 insertions, 0 deletions
diff --git a/src/libstddjb/prot_grps.c b/src/libstddjb/prot_grps.c
new file mode 100644
index 0000000..cc4ba0d
--- /dev/null
+++ b/src/libstddjb/prot_grps.c
@@ -0,0 +1,17 @@
+/* ISC license. */
+
+/* MT-unsafe */
+
+#include <skalibs/nonposix.h>
+#include <unistd.h>
+#include <grp.h>
+#include <limits.h>
+#include <skalibs/setgroups.h>
+#include <skalibs/djbunix.h>
+
+int prot_grps (char const *name)
+{
+  gid_t tab[NGROUPS_MAX] ;
+  int n = prot_readgroups(name, tab, NGROUPS_MAX) ;
+  return n < 0 ? -1 : setgroups(n, tab) ;
+}