From 15f67d146cf1f32504e8a11de3faa2abc0f467cd Mon Sep 17 00:00:00 2001
From: Tony Cook <tony@develop-help.com>
Date: Mon, 25 Mar 2019 16:48:40 +1100
Subject: [PATCH] (perl #133951) add Internals::getcwd
--- MANIFEST
+++ MANIFEST
@@ -5425,6 +5425,7 @@ t/io/errno.t			See if $! is correctly set
 t/io/errnosig.t			Test case for restoration $! when leaving signal handlers
 t/io/fflush.t			See if auto-flush on fork/exec/system/qx works
 t/io/fs.t			See if directory manipulations work
+t/io/getcwd.t			See if Internals::getcwd is sane
 t/io/inplace.t			See if inplace editing works
 t/io/iofile.t			See if we can load IO::File on demand
 t/io/iprefix.t			See if inplace editing works with prefixes
--- /dev/null
+++ t/io/getcwd.t
@@ -0,0 +1,22 @@
+#!./perl -w
+
+BEGIN {
+    chdir 't' if -d 't';
+    require "./test.pl";
+    set_up_inc('../lib');
+}
+
+use Config;
+
+$Config{d_getcwd}
+  or plan skip_all => "no getcwd";
+
+my $cwd = Internals::getcwd();
+ok(!defined $cwd || $cwd ne "",
+   "Internals::getcwd() returned a reasonable result");
+
+if (defined $cwd) {
+    ok(-d $cwd, "check a success result is a directory");
+}
+
+done_testing();
--- universal.c
+++ universal.c
@@ -986,6 +986,25 @@ XS(XS_re_regexp_pattern)
     NOT_REACHED; /* NOTREACHED */
 }
 
+#ifdef HAS_GETCWD
+
+XS(XS_Internals_getcwd)
+{
+    dXSARGS;
+    SV *sv = sv_newmortal();
+
+    if (items != 0)
+        croak_xs_usage(cv, "");
+
+    (void)getcwd_sv(sv);
+
+    SvTAINTED_on(sv);
+    PUSHs(sv);
+    XSRETURN(1);
+}
+
+#endif
+
 #include "vutil.h"
 #include "vxs.inc"
 
@@ -1020,6 +1039,9 @@ static const struct xsub_details these_details[] = {
     {"re::regnames", XS_re_regnames, ";$"},
     {"re::regnames_count", XS_re_regnames_count, ""},
     {"re::regexp_pattern", XS_re_regexp_pattern, "$"},
+#ifdef HAS_GETCWD
+    {"Internals::getcwd", XS_Internals_getcwd, ""},
+#endif
 };
 
 STATIC OP*