Bring in an old faithful tool I've been using for just over 4 years now

(originally on a different OS without mkstemp()), albeit somewhat
bashed and hacked into something that doesn't look too much like
the original any more.  It should be upwardly compatable with
OpenBSD's mktemp(1) but does a couple of extra things.

I've taken OpenBSD's mktemp.1 man page and adapted it to suit.

1 files changed, 143 insertions, 0 deletions

diff --git a/usr.bin/mktemp/mktemp.c b/usr.bin/mktemp/mktemp.c
new file mode 100644
index 0000000..964fe97
--- /dev/null
+++ b/usr.bin/mktemp/mktemp.c
@@ -0,0 +1,143 @@
+/*-
+ * Copyright (c) 1994, 1995, 1996, 1998 Peter Wemm <peter@netplex.com.au>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * This program was originally written long ago, originally for a non
+ * BSD-like OS without mkstemp().  It's been modified over the years
+ * to use mkstemp() rather than the original O_CREAT|O_EXCL/fstat/lstat
+ * etc style hacks.
+ * A cleanup, misc options and mkdtemp() calls were added to try and work
+ * more like the OpenBSD version - which was first to publish the interface.
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <paths.h>
+#include <err.h>
+#include <string.h>
+
+int
+main(int argc, char **argv)
+{
+	int c, fd, ret;
+	char *usage = "[-d] [-q] [-t prefix] [-u] [template ...]";
+	char *tmpdir, *prefix;
+	char *prog;
+	char *name;
+	int dflag, qflag, tflag, uflag;
+
+	ret = dflag = qflag = tflag = uflag = 0;
+	name = NULL;
+	prog = argv[0];		/* XXX basename(argv[0]) */
+
+	while ((c = getopt(argc, argv, "dqt:u")) != -1)
+		switch (c) {
+		case 'd':
+			dflag++;
+			break;
+
+		case 'q':
+			qflag++;
+			break;
+
+		case 't':
+			prefix = optarg;
+			tflag++;
+			break;
+
+		case 'u':
+			uflag++;
+			break;
+
+		default:
+			fprintf(stderr, "Usage: %s %s\n", prog, usage);
+			return (1);
+		}
+
+	argc -= optind;
+	argv += optind;
+
+	if (tflag) {
+		tmpdir = getenv("TMPDIR");
+		if (prefix == NULL)
+			prefix = "mktemp";	/* shouldn't happen, but.. */
+		if (tmpdir == NULL)
+			asprintf(&name, "%s%s.XXXXXXXX", _PATH_TMP, prefix);
+		else
+			asprintf(&name, "%s/%s.XXXXXXXX", tmpdir, prefix);
+		/* if this fails, the program is in big trouble already */
+		if (name == NULL) {
+			if (qflag)
+				return (1);
+			else
+				err(1, "cannot generate template");
+		}
+	} else if (argc < 1) {
+		fprintf(stderr, "Usage: %s %s\n", prog, usage);
+		return (1);
+	}
+		
+	/* generate all requested files */
+	while (name != NULL || argc > 0) {
+		if (name == NULL) {
+			name = strdup(argv[0]);
+			argv++;
+			argc--;
+		}
+
+		if (dflag) {
+			if (mkdtemp(name) == NULL) {
+				ret = 1;
+				if (!qflag)
+					warn("mkdtemp failed on %s", name);
+			} else {
+				printf("%s\n", name);
+				if (uflag)
+					rmdir(name);
+			}
+		} else {
+			fd = mkstemp(name);
+			if (fd < 0) {
+				ret = 1;
+				if (!qflag)
+					warn("mkstemp failed on %s", name);
+			} else {
+				close(fd);
+				if (uflag)
+					unlink(name);
+				printf("%s\n", name);
+			}
+		}
+		if (name)
+			free(name);
+		name = NULL;
+	}
+	return (ret);
+}