1 files changed, 43 insertions, 0 deletions
diff --git a/lib/getgr_nam_gid.c b/lib/getgr_nam_gid.c
new file mode 100644
index 0000000..fd0c217
--- /dev/null
+++ b/lib/getgr_nam_gid.c
@@ -0,0 +1,43 @@
+/*
+ * SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2000 - 2006, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <stdlib.h>
+#include <errno.h>
+#include <grp.h>
+#include "prototypes.h"
+
+/*
+ * getgr_nam_gid - Return a pointer to the group specified by a string.
+ * The string may be a valid GID or a valid groupname.
+ * If the group does not exist on the system, NULL is returned.
+ */
+extern /*@only@*//*@null@*/struct group *getgr_nam_gid (/*@null@*/const char *grname)
+{
+	char       *end;
+	long long  gid;
+
+	if (NULL == grname) {
+		return NULL;
+	}
+
+	errno = 0;
+	gid = strtoll(grname, &end, 10);
+	if (   ('\0' != *grname)
+	    && ('\0' == *end)
+	    && (0 == errno)
+	    && (/*@+longintegral@*/gid == (gid_t)gid)/*@=longintegral@*/) {
+		return xgetgrgid (gid);
+	}
+	return xgetgrnam (grname);
+}
+