2 files changed, 50 insertions, 0 deletions
diff --git a/src/grp/__grp.c b/src/grp/__grp.c
new file mode 100644
index 00000000..80c8ab4b
--- /dev/null
+++ b/src/grp/__grp.c
@@ -0,0 +1,18 @@
+#include "_grp.h"
+
+#ifndef _XOPEN_SOURCE
+#undef getgrent
+#define getgrent __getgrent
+#include "getgrent.c"
+#endif
+
+struct __grp __grp =
+{
+	NULL,
+	{ 0 },
+	getgrent,
+};
+
+/*
+POSIX(1)
+*/
diff --git a/src/grp/_grp.h b/src/grp/_grp.h
new file mode 100644
index 00000000..e3a15be4
--- /dev/null
+++ b/src/grp/_grp.h
@@ -0,0 +1,32 @@
+#ifndef ___GRP_H__
+#define ___GRP_H__
+
+#include <sys/types.h>
+#include <grp.h>
+#include <stdio.h>
+
+#define MAX_MEMBERS 128
+
+struct __grp {
+	FILE *db;
+	struct group grp;
+	struct group * (*getgrent)(void);
+	char *members[MAX_MEMBERS];
+};
+
+extern struct __grp __grp;
+
+#ifndef _XOPEN_SOURCE
+#define setgrent() (__grp.db == NULL ? (void)0 : (void)rewind(__grp.db))
+
+#define endgrent() do { \
+	if (__grp.db) { \
+		fclose(__grp.db); \
+		__grp.db = NULL; \
+	} \
+} while (0)
+
+#define getgrent __grp.getgrent
+#endif
+
+#endif