Create control sockets in clean temp directories

Adds a regress/mkdtemp tool and uses it to create empty temp
directories for tests needing control sockets.

Patch from Colin Watson via bz#2660; ok dtucker

1 files changed, 59 insertions, 0 deletions

diff --git a/regress/mkdtemp.c b/regress/mkdtemp.c
new file mode 100644
index 000000000..8c7d2e219
--- /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;
+}