Initial Spring 2016 commit.
This commit is contained in:
Geoffrey Challen
731
kern/main/menu.c
Normal file
731
kern/main/menu.c
Normal file
@@ -0,0 +1,731 @@
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/*
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* Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
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* The President and Fellows of Harvard College.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <types.h>
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#include <kern/errno.h>
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#include <kern/reboot.h>
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#include <kern/unistd.h>
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#include <limits.h>
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#include <lib.h>
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#include <uio.h>
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#include <clock.h>
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#include <thread.h>
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#include <proc.h>
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#include <vfs.h>
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#include <sfs.h>
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#include <syscall.h>
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#include <test.h>
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#include "opt-sfs.h"
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#include "opt-net.h"
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/*
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* In-kernel menu and command dispatcher.
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*/
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#define _PATH_SHELL "/bin/sh"
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#define MAXMENUARGS 16
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////////////////////////////////////////////////////////////
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//
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// Command menu functions
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/*
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* Function for a thread that runs an arbitrary userlevel program by
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* name.
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*
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* Note: this cannot pass arguments to the program. You may wish to
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* change it so it can, because that will make testing much easier
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* in the future.
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*
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* It copies the program name because runprogram destroys the copy
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* it gets by passing it to vfs_open().
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*/
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static
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void
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cmd_progthread(void *ptr, unsigned long nargs)
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{
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char **args = ptr;
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char progname[128];
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int result;
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KASSERT(nargs >= 1);
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if (nargs > 2) {
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kprintf("Warning: argument passing from menu not supported\n");
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}
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/* Hope we fit. */
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KASSERT(strlen(args[0]) < sizeof(progname));
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strcpy(progname, args[0]);
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result = runprogram(progname);
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if (result) {
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kprintf("Running program %s failed: %s\n", args[0],
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strerror(result));
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return;
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}
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/* NOTREACHED: runprogram only returns on error. */
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}
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/*
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* Common code for cmd_prog and cmd_shell.
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*
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* Note that this does not wait for the subprogram to finish, but
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* returns immediately to the menu. This is usually not what you want,
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* so you should have it call your system-calls-assignment waitpid
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* code after forking.
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*
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* Also note that because the subprogram's thread uses the "args"
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* array and strings, until you do this a race condition exists
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* between that code and the menu input code.
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*/
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static
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int
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common_prog(int nargs, char **args)
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{
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struct proc *proc;
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int result;
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/* Create a process for the new program to run in. */
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proc = proc_create_runprogram(args[0] /* name */);
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if (proc == NULL) {
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return ENOMEM;
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}
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result = thread_fork(args[0] /* thread name */,
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proc /* new process */,
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cmd_progthread /* thread function */,
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args /* thread arg */, nargs /* thread arg */);
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if (result) {
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kprintf("thread_fork failed: %s\n", strerror(result));
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proc_destroy(proc);
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return result;
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}
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/*
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* The new process will be destroyed when the program exits...
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* once you write the code for handling that.
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*/
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return 0;
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}
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/*
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* Command for running an arbitrary userlevel program.
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*/
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static
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int
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cmd_prog(int nargs, char **args)
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{
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if (nargs < 2) {
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kprintf("Usage: p program [arguments]\n");
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return EINVAL;
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}
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/* drop the leading "p" */
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args++;
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nargs--;
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return common_prog(nargs, args);
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}
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/*
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* Command for starting the system shell.
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*/
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static
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int
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cmd_shell(int nargs, char **args)
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{
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(void)args;
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if (nargs != 1) {
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kprintf("Usage: s\n");
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return EINVAL;
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}
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args[0] = (char *)_PATH_SHELL;
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return common_prog(nargs, args);
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}
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/*
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* Command for changing directory.
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*/
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static
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int
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cmd_chdir(int nargs, char **args)
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{
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if (nargs != 2) {
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kprintf("Usage: cd directory\n");
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return EINVAL;
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}
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return vfs_chdir(args[1]);
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}
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/*
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* Command for printing the current directory.
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*/
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static
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int
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cmd_pwd(int nargs, char **args)
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{
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char buf[PATH_MAX+1];
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int result;
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struct iovec iov;
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struct uio ku;
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(void)nargs;
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(void)args;
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uio_kinit(&iov, &ku, buf, sizeof(buf)-1, 0, UIO_READ);
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result = vfs_getcwd(&ku);
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if (result) {
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kprintf("vfs_getcwd failed (%s)\n", strerror(result));
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return result;
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}
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/* null terminate */
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buf[sizeof(buf)-1-ku.uio_resid] = 0;
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/* print it */
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kprintf("%s\n", buf);
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return 0;
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}
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/*
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* Command for running sync.
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*/
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static
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int
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cmd_sync(int nargs, char **args)
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{
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(void)nargs;
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(void)args;
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vfs_sync();
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return 0;
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}
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/*
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* Command for doing an intentional panic.
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*/
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static
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int
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cmd_panic(int nargs, char **args)
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{
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(void)nargs;
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(void)args;
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panic("User requested panic\n");
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return 0;
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}
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/*
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* Command for shutting down.
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*/
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static
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int
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cmd_quit(int nargs, char **args)
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{
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(void)nargs;
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(void)args;
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vfs_sync();
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sys_reboot(RB_POWEROFF);
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thread_exit();
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return 0;
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}
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/*
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* Command for mounting a filesystem.
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*/
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/* Table of mountable filesystem types. */
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static const struct {
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const char *name;
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int (*func)(const char *device);
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} mounttable[] = {
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#if OPT_SFS
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{ "sfs", sfs_mount },
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#endif
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};
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static
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int
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cmd_mount(int nargs, char **args)
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{
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char *fstype;
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char *device;
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unsigned i;
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if (nargs != 3) {
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kprintf("Usage: mount fstype device:\n");
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return EINVAL;
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}
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fstype = args[1];
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device = args[2];
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/* Allow (but do not require) colon after device name */
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if (device[strlen(device)-1]==':') {
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device[strlen(device)-1] = 0;
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}
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for (i=0; i<ARRAYCOUNT(mounttable); i++) {
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if (!strcmp(mounttable[i].name, fstype)) {
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return mounttable[i].func(device);
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}
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}
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kprintf("Unknown filesystem type %s\n", fstype);
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return EINVAL;
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}
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static
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int
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cmd_unmount(int nargs, char **args)
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{
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char *device;
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if (nargs != 2) {
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kprintf("Usage: unmount device:\n");
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return EINVAL;
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}
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device = args[1];
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/* Allow (but do not require) colon after device name */
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if (device[strlen(device)-1]==':') {
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device[strlen(device)-1] = 0;
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}
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return vfs_unmount(device);
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}
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/*
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* Command to set the "boot fs".
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*
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* The boot filesystem is the one that pathnames like /bin/sh with
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* leading slashes refer to.
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*
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* The default bootfs is "emu0".
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*/
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static
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int
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cmd_bootfs(int nargs, char **args)
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{
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char *device;
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if (nargs != 2) {
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kprintf("Usage: bootfs device\n");
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return EINVAL;
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}
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device = args[1];
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/* Allow (but do not require) colon after device name */
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if (device[strlen(device)-1]==':') {
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device[strlen(device)-1] = 0;
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}
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return vfs_setbootfs(device);
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}
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static
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int
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cmd_kheapstats(int nargs, char **args)
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{
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(void)nargs;
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(void)args;
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kheap_printstats();
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return 0;
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}
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static
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int
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cmd_kheapgeneration(int nargs, char **args)
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{
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(void)nargs;
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(void)args;
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kheap_nextgeneration();
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return 0;
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}
|
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static
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int
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cmd_kheapdump(int nargs, char **args)
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{
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if (nargs == 1) {
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kheap_dump();
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}
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else if (nargs == 2 && !strcmp(args[1], "all")) {
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kheap_dumpall();
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||||
}
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else {
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kprintf("Usage: khdump [all]\n");
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||||
}
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||||
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return 0;
|
||||
}
|
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|
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////////////////////////////////////////
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//
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// Menus.
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||||
static
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void
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showmenu(const char *name, const char *x[])
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{
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int ct, half, i;
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kprintf("\n");
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kprintf("%s\n", name);
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||||
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||||
for (i=ct=0; x[i]; i++) {
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||||
ct++;
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||||
}
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||||
half = (ct+1)/2;
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||||
|
||||
for (i=0; i<half; i++) {
|
||||
kprintf(" %-36s", x[i]);
|
||||
if (i+half < ct) {
|
||||
kprintf("%s", x[i+half]);
|
||||
}
|
||||
kprintf("\n");
|
||||
}
|
||||
|
||||
kprintf("\n");
|
||||
}
|
||||
|
||||
static const char *opsmenu[] = {
|
||||
"[s] Shell ",
|
||||
"[p] Other program ",
|
||||
"[mount] Mount a filesystem ",
|
||||
"[unmount] Unmount a filesystem ",
|
||||
"[bootfs] Set \"boot\" filesystem ",
|
||||
"[pf] Print a file ",
|
||||
"[cd] Change directory ",
|
||||
"[pwd] Print current directory ",
|
||||
"[sync] Sync filesystems ",
|
||||
"[panic] Intentional panic ",
|
||||
"[q] Quit and shut down ",
|
||||
NULL
|
||||
};
|
||||
|
||||
static
|
||||
int
|
||||
cmd_opsmenu(int n, char **a)
|
||||
{
|
||||
(void)n;
|
||||
(void)a;
|
||||
|
||||
showmenu("OS/161 operations menu", opsmenu);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const char *testmenu[] = {
|
||||
"[at] Array test ",
|
||||
"[at2] Large array test ",
|
||||
"[bt] Bitmap test ",
|
||||
"[tlt] Threadlist test ",
|
||||
"[km1] Kernel malloc test ",
|
||||
"[km2] kmalloc stress test ",
|
||||
"[km3] Large kmalloc test ",
|
||||
"[km4] Multipage kmalloc test ",
|
||||
"[tt1] Thread test 1 ",
|
||||
"[tt2] Thread test 2 ",
|
||||
"[tt3] Thread test 3 ",
|
||||
#if OPT_NET
|
||||
"[net] Network test ",
|
||||
#endif
|
||||
"[sy1] Semaphore test ",
|
||||
"[sy2] Lock test (1) ",
|
||||
"[sy3] CV test (1) ",
|
||||
"[sy4] CV test #2 (1) ",
|
||||
"[semu1-22] Semaphore unit tests ",
|
||||
"[fs1] Filesystem test ",
|
||||
"[fs2] FS read stress ",
|
||||
"[fs3] FS write stress ",
|
||||
"[fs4] FS write stress 2 ",
|
||||
"[fs5] FS long stress ",
|
||||
"[fs6] FS create stress ",
|
||||
NULL
|
||||
};
|
||||
|
||||
static
|
||||
int
|
||||
cmd_testmenu(int n, char **a)
|
||||
{
|
||||
(void)n;
|
||||
(void)a;
|
||||
|
||||
showmenu("OS/161 tests menu", testmenu);
|
||||
kprintf(" (1) These tests will fail until you finish the "
|
||||
"synch assignment.\n");
|
||||
kprintf("\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const char *mainmenu[] = {
|
||||
"[?o] Operations menu ",
|
||||
"[?t] Tests menu ",
|
||||
"[kh] Kernel heap stats ",
|
||||
"[khgen] Next kernel heap generation ",
|
||||
"[khdump] Dump kernel heap ",
|
||||
"[q] Quit and shut down ",
|
||||
NULL
|
||||
};
|
||||
|
||||
static
|
||||
int
|
||||
cmd_mainmenu(int n, char **a)
|
||||
{
|
||||
(void)n;
|
||||
(void)a;
|
||||
|
||||
showmenu("OS/161 kernel menu", mainmenu);
|
||||
return 0;
|
||||
}
|
||||
|
||||
////////////////////////////////////////
|
||||
//
|
||||
// Command table.
|
||||
|
||||
static struct {
|
||||
const char *name;
|
||||
int (*func)(int nargs, char **args);
|
||||
} cmdtable[] = {
|
||||
/* menus */
|
||||
{ "?", cmd_mainmenu },
|
||||
{ "h", cmd_mainmenu },
|
||||
{ "help", cmd_mainmenu },
|
||||
{ "?o", cmd_opsmenu },
|
||||
{ "?t", cmd_testmenu },
|
||||
|
||||
/* operations */
|
||||
{ "s", cmd_shell },
|
||||
{ "p", cmd_prog },
|
||||
{ "mount", cmd_mount },
|
||||
{ "unmount", cmd_unmount },
|
||||
{ "bootfs", cmd_bootfs },
|
||||
{ "pf", printfile },
|
||||
{ "cd", cmd_chdir },
|
||||
{ "pwd", cmd_pwd },
|
||||
{ "sync", cmd_sync },
|
||||
{ "panic", cmd_panic },
|
||||
{ "q", cmd_quit },
|
||||
{ "exit", cmd_quit },
|
||||
{ "halt", cmd_quit },
|
||||
|
||||
/* stats */
|
||||
{ "kh", cmd_kheapstats },
|
||||
{ "khgen", cmd_kheapgeneration },
|
||||
{ "khdump", cmd_kheapdump },
|
||||
|
||||
/* base system tests */
|
||||
{ "at", arraytest },
|
||||
{ "at2", arraytest2 },
|
||||
{ "bt", bitmaptest },
|
||||
{ "tlt", threadlisttest },
|
||||
{ "km1", kmalloctest },
|
||||
{ "km2", kmallocstress },
|
||||
{ "km3", kmalloctest3 },
|
||||
{ "km4", kmalloctest4 },
|
||||
#if OPT_NET
|
||||
{ "net", nettest },
|
||||
#endif
|
||||
{ "tt1", threadtest },
|
||||
{ "tt2", threadtest2 },
|
||||
{ "tt3", threadtest3 },
|
||||
{ "sy1", semtest },
|
||||
|
||||
/* synchronization assignment tests */
|
||||
{ "sy2", locktest },
|
||||
{ "sy3", cvtest },
|
||||
{ "sy4", cvtest2 },
|
||||
|
||||
/* semaphore unit tests */
|
||||
{ "semu1", semu1 },
|
||||
{ "semu2", semu2 },
|
||||
{ "semu3", semu3 },
|
||||
{ "semu4", semu4 },
|
||||
{ "semu5", semu5 },
|
||||
{ "semu6", semu6 },
|
||||
{ "semu7", semu7 },
|
||||
{ "semu8", semu8 },
|
||||
{ "semu9", semu9 },
|
||||
{ "semu10", semu10 },
|
||||
{ "semu11", semu11 },
|
||||
{ "semu12", semu12 },
|
||||
{ "semu13", semu13 },
|
||||
{ "semu14", semu14 },
|
||||
{ "semu15", semu15 },
|
||||
{ "semu16", semu16 },
|
||||
{ "semu17", semu17 },
|
||||
{ "semu18", semu18 },
|
||||
{ "semu19", semu19 },
|
||||
{ "semu20", semu20 },
|
||||
{ "semu21", semu21 },
|
||||
{ "semu22", semu22 },
|
||||
|
||||
/* file system assignment tests */
|
||||
{ "fs1", fstest },
|
||||
{ "fs2", readstress },
|
||||
{ "fs3", writestress },
|
||||
{ "fs4", writestress2 },
|
||||
{ "fs5", longstress },
|
||||
{ "fs6", createstress },
|
||||
|
||||
{ NULL, NULL }
|
||||
};
|
||||
|
||||
/*
|
||||
* Process a single command.
|
||||
*/
|
||||
static
|
||||
int
|
||||
cmd_dispatch(char *cmd)
|
||||
{
|
||||
struct timespec before, after, duration;
|
||||
char *args[MAXMENUARGS];
|
||||
int nargs=0;
|
||||
char *word;
|
||||
char *context;
|
||||
int i, result;
|
||||
|
||||
for (word = strtok_r(cmd, " \t", &context);
|
||||
word != NULL;
|
||||
word = strtok_r(NULL, " \t", &context)) {
|
||||
|
||||
if (nargs >= MAXMENUARGS) {
|
||||
kprintf("Command line has too many words\n");
|
||||
return E2BIG;
|
||||
}
|
||||
args[nargs++] = word;
|
||||
}
|
||||
|
||||
if (nargs==0) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
for (i=0; cmdtable[i].name; i++) {
|
||||
if (*cmdtable[i].name && !strcmp(args[0], cmdtable[i].name)) {
|
||||
KASSERT(cmdtable[i].func!=NULL);
|
||||
|
||||
gettime(&before);
|
||||
|
||||
result = cmdtable[i].func(nargs, args);
|
||||
|
||||
gettime(&after);
|
||||
timespec_sub(&after, &before, &duration);
|
||||
|
||||
kprintf("Operation took %llu.%09lu seconds\n",
|
||||
(unsigned long long) duration.tv_sec,
|
||||
(unsigned long) duration.tv_nsec);
|
||||
|
||||
return result;
|
||||
}
|
||||
}
|
||||
|
||||
kprintf("%s: Command not found\n", args[0]);
|
||||
return EINVAL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Evaluate a command line that may contain multiple semicolon-delimited
|
||||
* commands.
|
||||
*
|
||||
* If "isargs" is set, we're doing command-line processing; print the
|
||||
* comamnds as we execute them and panic if the command is invalid or fails.
|
||||
*/
|
||||
static
|
||||
void
|
||||
menu_execute(char *line, int isargs)
|
||||
{
|
||||
char *command;
|
||||
char *context;
|
||||
int result;
|
||||
|
||||
for (command = strtok_r(line, ";", &context);
|
||||
command != NULL;
|
||||
command = strtok_r(NULL, ";", &context)) {
|
||||
|
||||
if (isargs) {
|
||||
kprintf("OS/161 kernel: %s\n", command);
|
||||
}
|
||||
|
||||
result = cmd_dispatch(command);
|
||||
if (result) {
|
||||
kprintf("Menu command failed: %s\n", strerror(result));
|
||||
if (isargs) {
|
||||
panic("Failure processing kernel arguments\n");
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Command menu main loop.
|
||||
*
|
||||
* First, handle arguments passed on the kernel's command line from
|
||||
* the bootloader. Then loop prompting for commands.
|
||||
*
|
||||
* The line passed in from the bootloader is treated as if it had been
|
||||
* typed at the prompt. Semicolons separate commands; spaces and tabs
|
||||
* separate words (command names and arguments).
|
||||
*
|
||||
* So, for instance, to mount an SFS on lhd0 and make it the boot
|
||||
* filesystem, and then boot directly into the shell, one would use
|
||||
* the kernel command line
|
||||
*
|
||||
* "mount sfs lhd0; bootfs lhd0; s"
|
||||
*/
|
||||
|
||||
void
|
||||
menu(char *args)
|
||||
{
|
||||
char buf[64];
|
||||
|
||||
menu_execute(args, 1);
|
||||
|
||||
while (1) {
|
||||
kprintf("OS/161 kernel [? for menu]: ");
|
||||
kgets(buf, sizeof(buf));
|
||||
menu_execute(buf, 0);
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user