Add barebones mktemp(1)

mktemp.c

@@ -0,0 +1,49 @@
+/* See LICENSE file for copyright and license details. */
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "util.h"
+
+static void
+usage(void)
+{
+	eprintf("usage: %s [-d] [template]\n", argv0);
+}
+
+static int dflag = 0;
+
+int
+main(int argc, char *argv[])
+{
+	char *template = "tmp.XXXXXXXXXX";
+	char *tmpdir = "/tmp";
+	char tmppath[PATH_MAX];
+	int fd;
+
+	ARGBEGIN {
+	case 'd':
+		dflag = 1;
+		break;
+	default:
+		usage();
+	} ARGEND;
+
+	if (argc > 1)
+		usage();
+	else if (argc == 1)
+		template = argv[0];
+
+	snprintf(tmppath, sizeof(tmppath), "%s/%s", tmpdir, template);
+	if (dflag) {
+		if (!mkdtemp(tmppath))
+			eprintf("mkdtemp %s:", tmppath);
+	} else {
+		if ((fd = mkstemp(tmppath)) < 0)
+			eprintf("mkstemp %s:", tmppath);
+		close(fd);
+	}
+	puts(tmppath);
+	return EXIT_SUCCESS;
+}