1 files changed, 35 insertions, 0 deletions

diff --git a/busybox/libbb/xgetlarg.c b/busybox/libbb/xgetlarg.c
new file mode 100644
index 000000000..56fb60e82
--- /dev/null
+++ b/busybox/libbb/xgetlarg.c
@@ -0,0 +1,35 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Copyright (C) 2003-2004 Erik Andersen <andersen@codepoet.org>
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <errno.h>
+#include <assert.h>
+#include <ctype.h>
+
+#include "busybox.h"
+
+extern long bb_xgetlarg(const char *arg, int base, long lower, long upper)
+{
+        long result;
+        char *endptr;
+        int errno_save = errno;
+
+        assert(arg!=NULL);
+
+        /* Don't allow leading whitespace. */
+        if ((isspace)(*arg)) {  /* Use an actual funciton call for minimal size. */
+                bb_show_usage();
+        }
+
+        errno = 0;
+        result = strtol(arg, &endptr, base);
+        if (errno != 0 || *endptr!='\0' || endptr==arg || result < lower || result > upper)
+                bb_show_usage();
+        errno = errno_save;
+        return result;
+}