1 files changed, 29 insertions, 0 deletions
diff --git a/otherlibs/unix/getgroups.c b/otherlibs/unix/getgroups.c
new file mode 100644
index 000000000..b5c1d52e4
--- /dev/null
+++ b/otherlibs/unix/getgroups.c
@@ -0,0 +1,29 @@
+#include <mlvalues.h>
+#include <alloc.h>
+
+#ifdef HAS_GETGROUPS
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include "unix.h"
+
+value unix_getgroups()           /* ML */
+{
+  int gidset[NGROUPS];
+  int n;
+  value res;
+  int i;
+
+  n = getgroups(NGROUPS, gidset);
+  if (n == -1) uerror("getgroups", Nothing);
+  res = alloc_tuple(n);
+  for (i = 0; i < n; i++)
+    Field(res, i) = Val_int(gidset[i]);
+  return res;
+}
+
+#else
+
+value unix_getgroups() { invalid_argument("getgroups not implemented"); }
+
+#endif