From 6ca09916439a58f0789deb79960ee5defc05a946 Mon Sep 17 00:00:00 2001
From: Colin Watson <cjwatson@debian.org>
Date: Tue, 3 Jan 2017 12:09:42 +0000
Subject: Create mux socket for regress in temp directory

In some setups, creating the socket under OBJ may result in a path that
is too long for a Unix domain socket.  Add a helper to let us portably
create a temporary directory instead.

Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=2660
Last-Update: 2017-01-03

Patch-Name: regress-mktemp.patch
---
 Makefile.in           |  5 +++++
 regress/forwarding.sh |  3 ++-
 regress/mkdtemp.c     | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++
 regress/multiplex.sh  |  3 ++-
 regress/test-exec.sh  | 11 ++++++++++
 5 files changed, 79 insertions(+), 2 deletions(-)
 create mode 100644 regress/mkdtemp.c

diff --git a/Makefile.in b/Makefile.in
index a6eb81ec..a00347e2 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -459,6 +459,10 @@ regress/check-perm$(EXEEXT): $(srcdir)/regress/check-perm.c $(REGRESSLIBS)
 	$(CC) $(CFLAGS) $(CPPFLAGS) -o $@ $(srcdir)/regress/check-perm.c \
 	$(LDFLAGS) -lssh -lopenbsd-compat -lssh -lopenbsd-compat $(LIBS)
 
+regress/mkdtemp$(EXEEXT): $(srcdir)/regress/mkdtemp.c $(REGRESSLIBS)
+	$(CC) $(CFLAGS) $(CPPFLAGS) -o $@ $(srcdir)/regress/mkdtemp.c \
+	$(LDFLAGS) -lssh -lopenbsd-compat -lssh -lopenbsd-compat $(LIBS)
+
 UNITTESTS_TEST_HELPER_OBJS=\
 	regress/unittests/test_helper/test_helper.o \
 	regress/unittests/test_helper/fuzz.o
@@ -557,6 +561,7 @@ regress-binaries: regress/modpipe$(EXEEXT) \
 	regress/setuid-allowed$(EXEEXT) \
 	regress/netcat$(EXEEXT) \
 	regress/check-perm$(EXEEXT) \
+	regress/mkdtemp$(EXEEXT) \
 	regress/unittests/sshbuf/test_sshbuf$(EXEEXT) \
 	regress/unittests/sshkey/test_sshkey$(EXEEXT) \
 	regress/unittests/bitmap/test_bitmap$(EXEEXT) \
diff --git a/regress/forwarding.sh b/regress/forwarding.sh
index a1a4b13f..592de7bc 100644
--- a/regress/forwarding.sh
+++ b/regress/forwarding.sh
@@ -10,7 +10,8 @@ start_sshd
 base=33
 last=$PORT
 fwd=""
-CTL=$OBJ/ctl-sock
+make_tmpdir
+CTL=$TMP/ctl-sock
 
 for j in 0 1 2; do
 	for i in 0 1 2; do
diff --git a/regress/mkdtemp.c b/regress/mkdtemp.c
new file mode 100644
index 00000000..8c7d2e21
--- /dev/null
+++ b/regress/mkdtemp.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2017 Colin Watson <cjwatson@debian.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* Roughly equivalent to "mktemp -d -t TEMPLATE", but portable. */
+
+#include "includes.h"
+
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "log.h"
+
+static void
+usage(void)
+{
+	fprintf(stderr, "mkdtemp template\n");
+	exit(1);
+}
+
+int
+main(int argc, char **argv)
+{
+	const char *base;
+	const char *tmpdir;
+	char template[PATH_MAX];
+	int r;
+	char *dir;
+
+	if (argc != 2)
+		usage();
+	base = argv[1];
+
+	if ((tmpdir = getenv("TMPDIR")) == NULL)
+		tmpdir = "/tmp";
+	r = snprintf(template, sizeof(template), "%s/%s", tmpdir, base);
+	if (r < 0 || (size_t)r >= sizeof(template))
+		fatal("template string too long");
+	dir = mkdtemp(template);
+	if (dir == NULL) {
+		perror("mkdtemp");
+		exit(1);
+	}
+	puts(dir);
+	return 0;
+}
diff --git a/regress/multiplex.sh b/regress/multiplex.sh
index acb9234d..0ac4065e 100644
--- a/regress/multiplex.sh
+++ b/regress/multiplex.sh
@@ -1,7 +1,8 @@
 #	$OpenBSD: multiplex.sh,v 1.27 2014/12/22 06:14:29 djm Exp $
 #	Placed in the Public Domain.
 
-CTL=/tmp/openssh.regress.ctl-sock.$$
+make_tmpdir
+CTL=$TMP/ctl-sock
 
 tid="connection multiplexing"
 
diff --git a/regress/test-exec.sh b/regress/test-exec.sh
index bfa48803..13a8e18f 100644
--- a/regress/test-exec.sh
+++ b/regress/test-exec.sh
@@ -317,6 +317,14 @@ stop_sshd ()
 	fi
 }
 
+TMP=
+
+make_tmpdir ()
+{
+	TMP="$($OBJ/mkdtemp openssh-regress-XXXXXXXXXXXX)" || \
+	    fatal "failed to create temporary directory"
+}
+
 # helper
 cleanup ()
 {
@@ -327,6 +335,9 @@ cleanup ()
 			kill $SSH_PID
 		fi
 	fi
+	if [ "x$TMP" != "x" ]; then
+		rm -rf "$TMP"
+	fi
 	stop_sshd
 }