This is the new unified bootstrap, sometimes known previously as the

'three-stage' bootstrap.
There are a number of caveats with the code in its current state:
 - The i386 bootstrap only supports booting from a floppy.
 - The kernel and kld do not yet know how to deal with the extended
   information and module summary passed in.
 - PnP-based autodetection and demand loading of modules is not implemented.
 - i386 ELF kernel loading is not ready yet.
 - The i386 bootstrap is loaded via an ugly blockmap.

On the alpha, both net- and disk-booting (SRM console machines only) is
supported.  No blockmaps are used by this code.

Obtained from:	Parts from the NetBSD/i386 standalone bootstrap.

1 files changed, 155 insertions, 0 deletions

diff --git a/sys/boot/common/commands.c b/sys/boot/common/commands.c
new file mode 100644
index 0000000..af6a475
--- /dev/null
+++ b/sys/boot/common/commands.c
@@ -0,0 +1,155 @@
+/*-
+ * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
+ * 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.
+ *
+ *	$Id$
+ */
+
+#include <stand.h>
+#include <string.h>
+#include <sys/reboot.h>
+
+#include "bootstrap.h"
+
+char		*command_errmsg;
+char		command_errbuf[256];	/* XXX should have procedural interface for setting, size limit? */
+    
+COMMAND_SET(help, "help", "detailed help", command_help);
+
+static int
+command_help(int argc, char *argv[])
+{
+    char	helppath[80];	/* XXX buffer size? */
+
+    /* page the help text from our load path */
+    sprintf(helppath, "%s/boot.help", getenv("loaddev"));
+    printf("%s\n", helppath);
+    if (pager_file(helppath) == -1)
+	printf("Verbose help not available, use '?' to list commands\n");
+    return(CMD_OK);
+}
+
+COMMAND_SET(commandlist, "?", "list commands", command_commandlist);
+
+static int
+command_commandlist(int argc, char *argv[])
+{
+    struct bootblk_command	**cmdp;
+    int				i;
+    
+    printf("Available commands:\n");
+    cmdp = (struct bootblk_command **)Xcommand_set.ls_items;
+    for (i = 0; i < Xcommand_set.ls_length; i++)
+	if (cmdp[i]->c_name != NULL)
+	    printf("  %-15s  %s\n", cmdp[i]->c_name, cmdp[i]->c_desc);
+    return(CMD_OK);
+}
+
+/*
+ * XXX set/show should become set/echo if we have variable
+ * substitution happening.
+ */
+
+COMMAND_SET(show, "show", "show variable(s)", command_show);
+
+static int
+command_show(int argc, char *argv[])
+{
+    struct env_var	*ev;
+    char		*cp;
+
+    if (argc < 2) {
+	/* 
+	 * With no arguments, print everything.
+	 */
+	pager_open();
+	for (ev = environ; ev != NULL; ev = ev->ev_next) {
+	    pager_output(ev->ev_name);
+	    cp = getenv(ev->ev_name);
+	    if (cp != NULL) {
+		pager_output("=");
+		pager_output(cp);
+	    }
+	    pager_output("\n");
+	}
+	pager_close();
+    } else {
+	if ((cp = getenv(argv[1])) != NULL) {
+	    printf("%s\n", cp);
+	} else {
+	    sprintf(command_errbuf, "variable '%s' not found", argv[1]);
+	    return(CMD_ERROR);
+	}
+    }
+    return(CMD_OK);
+}
+
+COMMAND_SET(set, "set", "set a variable", command_set);
+
+static int
+command_set(int argc, char *argv[])
+{
+    int		err;
+    
+    if (argc != 2) {
+	command_errmsg = "wrong number of arguments";
+	return(CMD_ERROR);
+    } else {
+	if ((err = putenv(argv[1])) != 0) {
+	    command_errmsg = strerror(err);
+	    return(CMD_ERROR);
+	}
+    }
+    return(CMD_OK);
+}
+
+COMMAND_SET(unset, "unset", "unset a variable", command_unset);
+
+static int
+command_unset(int argc, char *argv[]) 
+{
+    int		err;
+    
+    if (argc != 2) {
+	command_errmsg = "wrong number of arguments";
+	return(CMD_ERROR);
+    } else {
+	if ((err = unsetenv(argv[1])) != 0) {
+	    command_errmsg = strerror(err);
+	    return(CMD_ERROR);
+	}
+    }
+    return(CMD_OK);
+}
+
+COMMAND_SET(panic, "panic", "test panic", command_panic);
+
+static int
+command_panic(int argc, char *argv[])
+{
+    char	*cp;
+    
+    cp = unargv(argc - 1, argv + 1);
+    panic(cp);
+}