DragonFly BSD support

2025-05-14 07:04:41 -04:00 · 2020-12-31 21:56:58 +08:00 · 2020-12-31 21:56:58 +08:00 · bfe194c190
commit bfe194c190
parent fb7008f49a
16 changed files with 1407 additions and 0 deletions
--- a/Unix/ventoy_unix_src/DragonFly/mount_null.c
+++ b/Unix/ventoy_unix_src/DragonFly/mount_null.c
@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 1992, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software donated to Berkeley by
+ * Jan-Simon Pendry.
+ *
+ * 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.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ *
+ * @(#) Copyright (c) 1992, 1993, 1994 The Regents of the University of California.  All rights reserved.
+ * @(#)mount_null.c	8.6 (Berkeley) 4/26/95
+ * $FreeBSD: src/sbin/mount_null/mount_null.c,v 1.13 1999/10/09 11:54:11 phk Exp $
+ */
+
+#include <sys/param.h>
+#include <sys/mount.h>
+#include <vfs/nullfs/null.h>
+
+#include <err.h>
+#include <mntopts.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sysexits.h>
+#include <unistd.h>
+
+static struct mntopt mopts[] = {
+	MOPT_STDOPTS,
+	MOPT_UPDATE,
+	MOPT_NULL
+};
+
+static void	usage(void) __dead2;
+
+int
+mount_null(const char *src, const char *dst)
+{
+	struct null_args args;
+	int ch, mntflags;
+	char source[MAXPATHLEN];
+	char target[MAXPATHLEN];
+	struct vfsconf vfc;
+	int error;
+
+	bzero(&args, sizeof(args));
+	mntflags = 0;
+
+    args.target = target;
+	checkpath(src, target);
+	checkpath(dst, source);
+
+	/*
+	 * Mount points that did not use distinct paths (e.g. / on /mnt)
+	 * used to be disallowed because mount linkages were stored in
+	 * vnodes and would lead to endlessly recursive trees.  DragonFly
+	 * stores mount linkages in the namecache topology and does not
+	 * have this problem, so paths no longer need to be distinct.
+	 */
+
+	error = getvfsbyname("null", &vfc);
+	if (error && vfsisloadable("null")) {
+		if(vfsload("null"))
+			err(EX_OSERR, "vfsload(null)");
+		endvfsent();
+		error = getvfsbyname("null", &vfc);
+	}
+	if (error)
+		errx(EX_OSERR, "null/loopback filesystem is not available");
+
+	if (mount(vfc.vfc_name, source, mntflags, &args))
+		err(1, NULL);
+    
+	return 0;
+}
+
+static void
+usage(void)
+{
+	fprintf(stderr,
+	    "usage: mount_null [-o options] target_fs mount_point\n");
+	fprintf(stderr,
+	    "       mount_null -u [-o options] mount_point\n");
+	exit(1);
+}