Add barebones mktemp(1)

Makefile

@@ -57,6 +57,7 @@ SRC = \
 	mkdir.c    \
 	mkfifo.c   \
 	mknod.c    \
+	mktemp.c   \
 	mv.c       \
 	nice.c     \
 	nl.c       \

mktemp.1

@@ -0,0 +1,20 @@
+.TH MKTEMP 1 sbase\-VERSION
+.SH NAME
+mktemp \- make temporary filename
+.SH SYNOPSIS
+.B mktemp
+.RB [ \-d ]
+.RB [ template ]
+.SH DESCRIPTION
+.B mktemp
+takes the given filename template and overwrites a portion of it
+to create a unique filename.  The template may be any filename with at least
+six `Xs' appended to it.  If no template is specified a default of
+`tmp.XXXXXXXXXX' is used and the tmpdir is currently fixed to `/tmp'.
+.SH OPTIONS
+.TP
+.B \-d
+Make a directory instead of a file
+.SH SEE ALSO
+.IR mkdtemp (3),
+.IR mkstemp (3)

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;
+}