+// Copyright 2000-2005 the Contributors, as shown in the revision logs.
+// Licensed under the Apache Public Source License 2.0 ("the License").
+// You may not use this file except in compliance with the License.
+
package org.ibex.nestedvm;
import org.ibex.nestedvm.util.*;
+// HACK: This is ugly, this stuff needs to be in org.ibex.util or something
+import org.ibex.classgen.util.Sort;
import java.io.*;
import java.util.*;
+import java.net.*;
+import java.lang.reflect.*; // For lazily linked RuntimeCompiler
+
+// FEATURE: vfork
public abstract class UnixRuntime extends Runtime implements Cloneable {
/** The pid of this "process" */
public final int getPid() { return pid; }
private static final GlobalState defaultGS = new GlobalState();
- private GlobalState gs = defaultGS;
+ private GlobalState gs;
public void setGlobalState(GlobalState gs) {
if(state != STOPPED) throw new IllegalStateException("can't change GlobalState when running");
+ if(gs == null) throw new NullPointerException("gs is null");
this.gs = gs;
}
private Vector activeChildren;
private Vector exitedChildren;
- protected UnixRuntime(int pageSize, int totalPages) {
- super(pageSize,totalPages);
+ protected UnixRuntime(int pageSize, int totalPages) { this(pageSize,totalPages,false); }
+ protected UnixRuntime(int pageSize, int totalPages, boolean exec) {
+ super(pageSize,totalPages,exec);
- // FEATURE: Do the proper mangling for non-unix hosts
- String userdir = getSystemProperty("user.dir");
- cwd = userdir != null && userdir.startsWith("/") && File.separatorChar == '/' ? userdir.substring(1) : "";
+ if(!exec) {
+ gs = defaultGS;
+ String userdir = Platform.getProperty("user.dir");
+ cwd = (userdir == null || Platform.getProperty("nestedvm.root") != null) ? null : HostFS.reverseMap(userdir);
+ if(cwd == null) cwd = "/";
+ cwd = cwd.substring(1);
+ }
}
- // NOTE: getDisplayName() is a Java2 function
private static String posixTZ() {
StringBuffer sb = new StringBuffer();
TimeZone zone = TimeZone.getDefault();
int off = zone.getRawOffset() / 1000;
- sb.append(zone.getDisplayName(false,TimeZone.SHORT));
+ sb.append(Platform.timeZoneGetDisplayName(zone,false,false));
if(off > 0) sb.append("-");
else off = -off;
sb.append(off/3600); off = off%3600;
if(off > 0) sb.append(":").append(off/60); off=off%60;
if(off > 0) sb.append(":").append(off);
if(zone.useDaylightTime())
- sb.append(zone.getDisplayName(true,TimeZone.SHORT));
+ sb.append(Platform.timeZoneGetDisplayName(zone,true,false));
return sb.toString();
}
}
String[] createEnv(String[] extra) {
- String[] defaults = new String[5];
+ String[] defaults = new String[7];
int n=0;
if(extra == null) extra = new String[0];
- if(!envHas("USER",extra) && getSystemProperty("user.name") != null)
- defaults[n++] = "USER=" + getSystemProperty("user.name");
- if(!envHas("HOME",extra) && getSystemProperty("user.home") != null)
- defaults[n++] = "HOME=" + getSystemProperty("user.home");
+ String tmp;
+ if(!envHas("USER",extra) && Platform.getProperty("user.name") != null)
+ defaults[n++] = "USER=" + Platform.getProperty("user.name");
+ if(!envHas("HOME",extra) && (tmp=Platform.getProperty("user.home")) != null && (tmp=HostFS.reverseMap(tmp)) != null)
+ defaults[n++] = "HOME=" + tmp;
+ if(!envHas("TMPDIR",extra) && (tmp=Platform.getProperty("java.io.tmpdir")) != null && (tmp=HostFS.reverseMap(tmp)) != null)
+ defaults[n++] = "TMPDIR=" + tmp;
if(!envHas("SHELL",extra)) defaults[n++] = "SHELL=/bin/sh";
- if(!envHas("TERM",extra)) defaults[n++] = "TERM=vt100";
+ if(!envHas("TERM",extra) && !win32Hacks) defaults[n++] = "TERM=vt100";
if(!envHas("TZ",extra)) defaults[n++] = "TZ=" + posixTZ();
+ if(!envHas("PATH",extra)) defaults[n++] = "PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin";
String[] env = new String[extra.length+n];
for(int i=0;i<n;i++) env[i] = defaults[i];
for(int i=0;i<extra.length;i++) env[n++] = extra[i];
UnixRuntime[] tasks = gs.tasks;
synchronized(gs) {
if(pid != 0) {
- if(tasks[pid] == null || tasks[pid].pid != pid) throw new Error("should never happen");
+ UnixRuntime prev = tasks[pid];
+ if(prev == null || prev == this || prev.pid != pid || prev.parent != parent)
+ throw new Error("should never happen");
+ synchronized(parent.children) {
+ int i = parent.activeChildren.indexOf(prev);
+ if(i == -1) throw new Error("should never happen");
+ parent.activeChildren.setElementAt(this,i);
+ }
} else {
int newpid = -1;
int nextPID = gs.nextPID;
- for(int i=nextPID;i<tasks.length;i++) if(tasks[i] == null) { newpid = i; break; }
- if(newpid == -1) for(int i=1;i<nextPID;i++) if(tasks[i] == null) { newpid = i; break; }
- if(newpid == -1) throw new ProcessTableFullExn();
- pid = newpid;
+ for(int i=nextPID;i<tasks.length;i++) if(tasks[i] == null) { newpid = i; break; }
+ if(newpid == -1) for(int i=1;i<nextPID;i++) if(tasks[i] == null) { newpid = i; break; }
+ if(newpid == -1) throw new ProcessTableFullExn();
+ pid = newpid;
gs.nextPID = newpid + 1;
}
tasks[pid] = this;
}
}
- int _syscall(int syscall, int a, int b, int c, int d) throws ErrnoException, FaultException {
+ int _syscall(int syscall, int a, int b, int c, int d, int e, int f) throws ErrnoException, FaultException {
switch(syscall) {
case SYS_kill: return sys_kill(a,b);
case SYS_fork: return sys_fork();
case SYS_chdir: return sys_chdir(a);
case SYS_exec: return sys_exec(a,b,c);
case SYS_getdents: return sys_getdents(a,b,c,d);
-
- default: return super._syscall(syscall,a,b,c,d);
+ case SYS_unlink: return sys_unlink(a);
+ case SYS_getppid: return sys_getppid();
+ case SYS_socket: return sys_socket(a,b,c);
+ case SYS_connect: return sys_connect(a,b,c);
+ case SYS_resolve_hostname: return sys_resolve_hostname(a,b,c);
+ case SYS_setsockopt: return sys_setsockopt(a,b,c,d,e);
+ case SYS_getsockopt: return sys_getsockopt(a,b,c,d,e);
+ case SYS_bind: return sys_bind(a,b,c);
+ case SYS_listen: return sys_listen(a,b);
+ case SYS_accept: return sys_accept(a,b,c);
+ case SYS_shutdown: return sys_shutdown(a,b);
+ case SYS_sysctl: return sys_sysctl(a,b,c,d,e,f);
+ case SYS_sendto: return sys_sendto(a,b,c,d,e,f);
+ case SYS_recvfrom: return sys_recvfrom(a,b,c,d,e,f);
+ case SYS_select: return sys_select(a,b,c,d,e);
+ case SYS_access: return sys_access(a,b);
+ case SYS_realpath: return sys_realpath(a,b);
+ case SYS_chown: return sys_chown(a,b,c);
+ case SYS_lchown: return sys_chown(a,b,c);
+ case SYS_fchown: return sys_fchown(a,b,c);
+ case SYS_chmod: return sys_chmod(a,b,c);
+ case SYS_fchmod: return sys_fchmod(a,b,c);
+ case SYS_umask: return sys_umask(a);
+
+ default: return super._syscall(syscall,a,b,c,d,e,f);
}
}
FD _open(String path, int flags, int mode) throws ErrnoException {
return gs.open(this,normalizePath(path),flags,mode);
}
+
+ private int sys_getppid() {
+ return parent == null ? 1 : parent.pid;
+ }
+
+ private int sys_chown(int fileAddr, int uid, int gid) {
+ return 0;
+ }
+ private int sys_lchown(int fileAddr, int uid, int gid) {
+ return 0;
+ }
+ private int sys_fchown(int fd, int uid, int gid) {
+ return 0;
+ }
+ private int sys_chmod(int fileAddr, int uid, int gid) {
+ return 0;
+ }
+ private int sys_fchmod(int fd, int uid, int gid) {
+ return 0;
+ }
+ private int sys_umask(int mask) {
+ return 0;
+ }
+
+ private int sys_access(int cstring, int mode) throws ErrnoException, ReadFaultException {
+ // FEATURE: sys_access
+ return gs.stat(this,cstring(cstring)) == null ? -ENOENT : 0;
+ }
+
+ private int sys_realpath(int inAddr, int outAddr) throws FaultException {
+ String s = normalizePath(cstring(inAddr));
+ byte[] b = getNullTerminatedBytes(s);
+ if(b.length > PATH_MAX) return -ERANGE;
+ copyout(b,outAddr,b.length);
+ return 0;
+ }
+ // FEATURE: Signal handling
+ // check flag only on backwards jumps to basic blocks without compulsatory checks
+ // (see A Portable Research Framework for the Execution of Java Bytecode - Etienne Gagnon, Chapter 2)
+
/** The kill syscall.
SIGSTOP, SIGTSTO, SIGTTIN, and SIGTTOUT pause the process.
SIGCONT, SIGCHLD, SIGIO, and SIGWINCH are ignored.
case 18: // SIGTSTP
case 21: // SIGTTIN
case 22: // SIGTTOU
- state = PAUSED;
- break;
case 19: // SIGCONT
case 20: // SIGCHLD
case 23: // SIGIO
case 28: // SIGWINCH
break;
default:
- return syscall(SYS_exit,128+signal,0,0,0);
+ exit(128+signal, true);
}
return 0;
}
synchronized(children) {
for(;;) {
if(pid == -1) {
- if(exitedChildren.size() > 0) done = (UnixRuntime)exitedChildren.remove(exitedChildren.size() - 1);
+ if(exitedChildren.size() > 0) {
+ done = (UnixRuntime)exitedChildren.elementAt(exitedChildren.size() - 1);
+ exitedChildren.removeElementAt(exitedChildren.size() - 1);
+ }
} else if(pid > 0) {
+ if(pid >= gs.tasks.length) return -ECHILD;
UnixRuntime t = gs.tasks[pid];
if(t.parent != this) return -ECHILD;
if(t.state == EXITED) {
- if(!exitedChildren.remove(t)) throw new Error("should never happen");
+ if(!exitedChildren.removeElement(t)) throw new Error("should never happen");
done = t;
}
} else {
UnixRuntime child = (UnixRuntime) e.nextElement();
gs.tasks[child.pid] = null;
}
- exitedChildren.clear();
+ exitedChildren.removeAllElements();
for(Enumeration e = activeChildren.elements(); e.hasMoreElements(); ) {
UnixRuntime child = (UnixRuntime) e.nextElement();
child.parent = null;
}
- activeChildren.clear();
+ activeChildren.removeAllElements();
}
UnixRuntime _parent = parent;
if(parent == null) {
gs.tasks[pid] = null;
} else {
- parent.activeChildren.remove(this);
- parent.exitedChildren.add(this);
+ if(!parent.activeChildren.removeElement(this)) throw new Error("should never happen _exited: pid: " + pid);
+ parent.exitedChildren.addElement(this);
parent.children.notify();
}
}
}
private int sys_fork() {
- CPUState state = new CPUState();
- getCPUState(state);
- int sp = state.r[SP];
final UnixRuntime r;
try {
activeChildren = new Vector();
exitedChildren = new Vector();
}
- activeChildren.add(r);
+ activeChildren.addElement(r);
+ CPUState state = new CPUState();
+ getCPUState(state);
state.r[V0] = 0; // return 0 to child
state.pc += 4; // skip over syscall instruction
r.setCPUState(state);
private int sys_exec(int cpath, int cargv, int cenvp) throws ErrnoException, FaultException {
return exec(normalizePath(cstring(cpath)),readStringArray(cargv),readStringArray(cenvp));
}
+
+ private final static Method runtimeCompilerCompile;
+ static {
+ Method m;
+ try {
+ m = Class.forName("org.ibex.nestedvm.RuntimeCompiler").getMethod("compile",new Class[]{Seekable.class,String.class,String.class});
+ } catch(NoSuchMethodException e) {
+ m = null;
+ } catch(ClassNotFoundException e) {
+ m = null;
+ }
+ runtimeCompilerCompile = m;
+ }
+
+ public Class runtimeCompile(Seekable s, String sourceName) throws IOException {
+ if(runtimeCompilerCompile == null) {
+ if(STDERR_DIAG) System.err.println("WARNING: Exec attempted but RuntimeCompiler not found!");
+ return null;
+ }
+
+ try {
+ return (Class) runtimeCompilerCompile.invoke(null,new Object[]{s,"unixruntime,maxinsnpermethod=256,lessconstants",sourceName});
+ } catch(IllegalAccessException e) {
+ e.printStackTrace();
+ return null;
+ } catch(InvocationTargetException e) {
+ Throwable t = e.getTargetException();
+ if(t instanceof IOException) throw (IOException) t;
+ if(t instanceof RuntimeException) throw (RuntimeException) t;
+ if(t instanceof Error) throw (Error) t;
+ if(STDERR_DIAG) t.printStackTrace();
+ return null;
+ }
+ }
- private int exec(String normalizedPath, String[] argv, String[] envp) throws ErrnoException {
+ private int exec(String path, String[] argv, String[] envp) throws ErrnoException {
if(argv.length == 0) argv = new String[]{""};
-
- Object o = gs.exec(this,normalizedPath);
- if(o == null) return -ENOENT;
-
- if(o instanceof Class) {
- Class c = (Class) o;
- try {
- return exec((UnixRuntime) c.newInstance(),argv,envp);
- } catch(Exception e) {
- e.printStackTrace();
- return -ENOEXEC;
+ // HACK: Hideous hack to make a standalone busybox possible
+ if(path.equals("bin/busybox") && getClass().getName().endsWith("BusyBox"))
+ return execClass(getClass(),argv,envp);
+
+ // NOTE: For this little hack to work nestedvm.root MUST be "."
+ /*try {
+ System.err.println("Execing normalized path: " + normalizedPath);
+ if(true) return exec(new Interpreter(normalizedPath),argv,envp);
+ } catch(IOException e) { throw new Error(e); }*/
+
+ FStat fstat = gs.stat(this,path);
+ if(fstat == null) return -ENOENT;
+ GlobalState.CacheEnt ent = (GlobalState.CacheEnt) gs.execCache.get(path);
+ long mtime = fstat.mtime();
+ long size = fstat.size();
+ if(ent != null) {
+ //System.err.println("Found cached entry for " + path);
+ if(ent.time ==mtime && ent.size == size) {
+ if(ent.o instanceof Class)
+ return execClass((Class) ent.o,argv,envp);
+ if(ent.o instanceof String[])
+ return execScript(path,(String[]) ent.o,argv,envp);
+ throw new Error("should never happen");
}
- } else {
- String[] command = (String[]) o;
- String[] newArgv = new String[argv.length + command[1] != null ? 2 : 1];
- int p = command[0].lastIndexOf('/');
- newArgv[0] = p == -1 ? command[0] : command[0].substring(p+1);
- p = 1;
- if(command[1] != null) newArgv[p++] = command[1];
- newArgv[p++] = "/" + normalizedPath;
- for(int i=1;i<argv.length;i++) newArgv[p++] = argv[i];
- return exec(command[0],newArgv,envp);
+ //System.err.println("Cache was out of date");
+ gs.execCache.remove(path);
+ }
+
+ FD fd = gs.open(this,path,RD_ONLY,0);
+ if(fd == null) throw new ErrnoException(ENOENT);
+ Seekable s = fd.seekable();
+ if(s == null) throw new ErrnoException(EACCES);
+
+ byte[] buf = new byte[4096];
+
+ try {
+ int n = s.read(buf,0,buf.length);
+ if(n == -1) throw new ErrnoException(ENOEXEC);
+
+ switch(buf[0]) {
+ case '\177': // possible ELF
+ if(n < 4) s.tryReadFully(buf,n,4-n);
+ if(buf[1] != 'E' || buf[2] != 'L' || buf[3] != 'F') return -ENOEXEC;
+ s.seek(0);
+ if(STDERR_DIAG) System.err.println("Running RuntimeCompiler for " + path);
+ Class c = runtimeCompile(s,path);
+ if(STDERR_DIAG) System.err.println("RuntimeCompiler finished for " + path);
+ if(c == null) throw new ErrnoException(ENOEXEC);
+ gs.execCache.put(path,new GlobalState.CacheEnt(mtime,size,c));
+ return execClass(c,argv,envp);
+ case '#':
+ if(n == 1) {
+ int n2 = s.read(buf,1,buf.length-1);
+ if(n2 == -1) return -ENOEXEC;
+ n += n2;
+ }
+ if(buf[1] != '!') return -ENOEXEC;
+ int p = 2;
+ n -= 2;
+ OUTER: for(;;) {
+ for(int i=p;i<p+n;i++) if(buf[i] == '\n') { p = i; break OUTER; }
+ p += n;
+ if(p == buf.length) break OUTER;
+ n = s.read(buf,p,buf.length-p);
+ }
+ int cmdStart = 2;
+ for(;cmdStart<p;cmdStart++) if(buf[cmdStart]!=' ') break;
+ if(cmdStart == p) throw new ErrnoException(ENOEXEC);
+ int argStart = cmdStart;
+ for(;argStart<p;argStart++) if(buf[argStart] == ' ') break;
+ int cmdEnd = argStart;
+ while(argStart < p && buf[argStart] == ' ') argStart++;
+ String[] command = new String[] {
+ new String(buf,cmdStart,cmdEnd-cmdStart),
+ argStart < p ? new String(buf,argStart,p-argStart) : null
+ };
+ gs.execCache.put(path,new GlobalState.CacheEnt(mtime,size,command));
+ return execScript(path,command,argv,envp);
+ default:
+ return -ENOEXEC;
+ }
+ } catch(IOException e) {
+ return -EIO;
+ } finally {
+ fd.close();
+ }
+ }
+
+ public int execScript(String path, String[] command, String[] argv, String[] envp) throws ErrnoException {
+ String[] newArgv = new String[argv.length-1 + (command[1] != null ? 3 : 2)];
+ int p = command[0].lastIndexOf('/');
+ newArgv[0] = p == -1 ? command[0] : command[0].substring(p+1);
+ newArgv[1] = "/" + path;
+ p = 2;
+ if(command[1] != null) newArgv[p++] = command[1];
+ for(int i=1;i<argv.length;i++) newArgv[p++] = argv[i];
+ if(p != newArgv.length) throw new Error("p != newArgv.length");
+ System.err.println("Execing: " + command[0]);
+ for(int i=0;i<newArgv.length;i++) System.err.println("execing [" + i + "] " + newArgv[i]);
+ return exec(command[0],newArgv,envp);
+ }
+
+ public int execClass(Class c,String[] argv, String[] envp) {
+ try {
+ UnixRuntime r = (UnixRuntime) c.getDeclaredConstructor(new Class[]{Boolean.TYPE}).newInstance(new Object[]{Boolean.TRUE});
+ return exec(r,argv,envp);
+ } catch(Exception e) {
+ e.printStackTrace();
+ return -ENOEXEC;
}
}
private int exec(UnixRuntime r, String[] argv, String[] envp) {
-
//System.err.println("Execing " + r);
for(int i=0;i<OPEN_MAX;i++) if(closeOnExec[i]) closeFD(i);
r.fds = fds;
return 0;
}
- // FEATURE: Make sure fstat info is correct
- // FEATURE: This could be faster if we did direct copies from each process' memory
- // FEATURE: Check this logic one more time
- public static class Pipe {
+ static class Pipe {
private final byte[] pipebuf = new byte[PIPE_BUF*4];
private int readPos;
private int writePos;
public final FD writer = new Writer();
public class Reader extends FD {
- protected FStat _fstat() { return new FStat(); }
+ protected FStat _fstat() { return new SocketFStat(); }
public int read(byte[] buf, int off, int len) throws ErrnoException {
if(len == 0) return 0;
synchronized(Pipe.this) {
return len;
}
}
+ public int flags() { return O_RDONLY; }
public void _close() { synchronized(Pipe.this) { readPos = -1; Pipe.this.notify(); } }
}
public class Writer extends FD {
- protected FStat _fstat() { return new FStat(); }
+ protected FStat _fstat() { return new SocketFStat(); }
public int write(byte[] buf, int off, int len) throws ErrnoException {
if(len == 0) return 0;
synchronized(Pipe.this) {
return len;
}
}
+ public int flags() { return O_WRONLY; }
public void _close() { synchronized(Pipe.this) { writePos = -1; Pipe.this.notify(); } }
}
}
return 0;
}
+ private int sys_unlink(int cstring) throws FaultException, ErrnoException {
+ gs.unlink(this,normalizePath(cstring(cstring)));
+ return 0;
+ }
+
private int sys_getcwd(int addr, int size) throws FaultException, ErrnoException {
byte[] b = getBytes(cwd);
if(size == 0) return -EINVAL;
private int sys_chdir(int addr) throws ErrnoException, FaultException {
String path = normalizePath(cstring(addr));
- //System.err.println("Chdir: " + cstring(addr) + " -> " + path + " pwd: " + cwd);
- if(gs.stat(this,path).type() != FStat.S_IFDIR) return -ENOTDIR;
+ FStat st = gs.stat(this,path);
+ if(st == null) return -ENOENT;
+ if(st.type() != FStat.S_IFDIR) return -ENOTDIR;
cwd = path;
- //System.err.println("Now: [" + cwd + "]");
return 0;
}
return n;
}
- // FEATURE: Run through the fork/wait stuff one more time
- public static class GlobalState {
- protected static final int OPEN = 1;
- protected static final int STAT = 2;
- protected static final int LSTAT = 3;
- protected static final int MKDIR = 4;
+ static class SocketFD extends FD {
+ public static final int TYPE_STREAM = 0;
+ public static final int TYPE_DGRAM = 1;
+ public static final int LISTEN = 2;
+ public int type() { return flags & 1; }
+ public boolean listen() { return (flags & 2) != 0; }
+
+ int flags;
+ int options;
+
+ Socket s;
+ ServerSocket ss;
+ DatagramSocket ds;
+
+ InetAddress bindAddr;
+ int bindPort = -1;
+ InetAddress connectAddr;
+ int connectPort = -1;
+
+ DatagramPacket dp;
+ InputStream is;
+ OutputStream os;
+
+ private static final byte[] EMPTY = new byte[0];
+ public SocketFD(int type) {
+ flags = type;
+ if(type == TYPE_DGRAM)
+ dp = new DatagramPacket(EMPTY,0);
+ }
+
+ public void setOptions() {
+ try {
+ if(s != null && type() == TYPE_STREAM && !listen()) {
+ Platform.socketSetKeepAlive(s,(options & SO_KEEPALIVE) != 0);
+ }
+ } catch(SocketException e) {
+ if(STDERR_DIAG) e.printStackTrace();
+ }
+ }
+
+ public void _close() {
+ try {
+ if(s != null) s.close();
+ if(ss != null) ss.close();
+ if(ds != null) ds.close();
+ } catch(IOException e) {
+ /* ignore */
+ }
+ }
+
+ public int read(byte[] a, int off, int length) throws ErrnoException {
+ if(type() == TYPE_DGRAM) return recvfrom(a,off,length,null,null);
+ if(is == null) throw new ErrnoException(EPIPE);
+ try {
+ int n = is.read(a,off,length);
+ return n < 0 ? 0 : n;
+ } catch(IOException e) {
+ throw new ErrnoException(EIO);
+ }
+ }
+
+ public int recvfrom(byte[] a, int off, int length, InetAddress[] sockAddr, int[] port) throws ErrnoException {
+ if(type() == TYPE_STREAM) return read(a,off,length);
+
+ if(off != 0) throw new IllegalArgumentException("off must be 0");
+ dp.setData(a);
+ dp.setLength(length);
+ try {
+ if(ds == null) ds = new DatagramSocket();
+ ds.receive(dp);
+ } catch(IOException e) {
+ if(STDERR_DIAG) e.printStackTrace();
+ throw new ErrnoException(EIO);
+ }
+ if(sockAddr != null) {
+ sockAddr[0] = dp.getAddress();
+ port[0] = dp.getPort();
+ }
+ return dp.getLength();
+ }
+
+ public int write(byte[] a, int off, int length) throws ErrnoException {
+ if(type() == TYPE_DGRAM) return sendto(a,off,length,null,-1);
+
+ if(os == null) throw new ErrnoException(EPIPE);
+ try {
+ os.write(a,off,length);
+ return length;
+ } catch(IOException e) {
+ throw new ErrnoException(EIO);
+ }
+ }
+
+ public int sendto(byte[] a, int off, int length, InetAddress destAddr, int destPort) throws ErrnoException {
+ if(off != 0) throw new IllegalArgumentException("off must be 0");
+ if(type() == TYPE_STREAM) return write(a,off,length);
+
+ if(destAddr == null) {
+ destAddr = connectAddr;
+ destPort = connectPort;
+
+ if(destAddr == null) throw new ErrnoException(ENOTCONN);
+ }
+
+ dp.setAddress(destAddr);
+ dp.setPort(destPort);
+ dp.setData(a);
+ dp.setLength(length);
+
+ try {
+ if(ds == null) ds = new DatagramSocket();
+ ds.send(dp);
+ } catch(IOException e) {
+ if(STDERR_DIAG) e.printStackTrace();
+ if("Network is unreachable".equals(e.getMessage())) throw new ErrnoException(EHOSTUNREACH);
+ throw new ErrnoException(EIO);
+ }
+ return dp.getLength();
+ }
+
+ public int flags() { return O_RDWR; }
+ public FStat _fstat() { return new SocketFStat(); }
+ }
+
+ private int sys_socket(int domain, int type, int proto) {
+ if(domain != AF_INET || (type != SOCK_STREAM && type != SOCK_DGRAM)) return -EPROTONOSUPPORT;
+ return addFD(new SocketFD(type == SOCK_STREAM ? SocketFD.TYPE_STREAM : SocketFD.TYPE_DGRAM));
+ }
+
+ private SocketFD getSocketFD(int fdn) throws ErrnoException {
+ if(fdn < 0 || fdn >= OPEN_MAX) throw new ErrnoException(EBADFD);
+ if(fds[fdn] == null) throw new ErrnoException(EBADFD);
+ if(!(fds[fdn] instanceof SocketFD)) throw new ErrnoException(ENOTSOCK);
+
+ return (SocketFD) fds[fdn];
+ }
+
+ private int sys_connect(int fdn, int addr, int namelen) throws ErrnoException, FaultException {
+ SocketFD fd = getSocketFD(fdn);
+
+ if(fd.type() == SocketFD.TYPE_STREAM && (fd.s != null || fd.ss != null)) return -EISCONN;
+ int word1 = memRead(addr);
+ if( ((word1 >>> 16)&0xff) != AF_INET) return -EAFNOSUPPORT;
+ int port = word1 & 0xffff;
+ byte[] ip = new byte[4];
+ copyin(addr+4,ip,4);
+
+ InetAddress inetAddr;
+ try {
+ inetAddr = Platform.inetAddressFromBytes(ip);
+ } catch(UnknownHostException e) {
+ return -EADDRNOTAVAIL;
+ }
+
+ fd.connectAddr = inetAddr;
+ fd.connectPort = port;
+
+ try {
+ switch(fd.type()) {
+ case SocketFD.TYPE_STREAM: {
+ Socket s = new Socket(inetAddr,port);
+ fd.s = s;
+ fd.setOptions();
+ fd.is = s.getInputStream();
+ fd.os = s.getOutputStream();
+ break;
+ }
+ case SocketFD.TYPE_DGRAM:
+ break;
+ default:
+ throw new Error("should never happen");
+ }
+ } catch(IOException e) {
+ return -ECONNREFUSED;
+ }
+
+ return 0;
+ }
+
+ private int sys_resolve_hostname(int chostname, int addr, int sizeAddr) throws FaultException {
+ String hostname = cstring(chostname);
+ int size = memRead(sizeAddr);
+ InetAddress[] inetAddrs;
+ try {
+ inetAddrs = InetAddress.getAllByName(hostname);
+ } catch(UnknownHostException e) {
+ return HOST_NOT_FOUND;
+ }
+ int count = min(size/4,inetAddrs.length);
+ for(int i=0;i<count;i++,addr+=4) {
+ byte[] b = inetAddrs[i].getAddress();
+ copyout(b,addr,4);
+ }
+ memWrite(sizeAddr,count*4);
+ return 0;
+ }
+
+ private int sys_setsockopt(int fdn, int level, int name, int valaddr, int len) throws ReadFaultException, ErrnoException {
+ SocketFD fd = getSocketFD(fdn);
+ switch(level) {
+ case SOL_SOCKET:
+ switch(name) {
+ case SO_REUSEADDR:
+ case SO_KEEPALIVE: {
+ if(len != 4) return -EINVAL;
+ int val = memRead(valaddr);
+ if(val != 0) fd.options |= name;
+ else fd.options &= ~name;
+ fd.setOptions();
+ return 0;
+ }
+ default:
+ if(STDERR_DIAG) System.err.println("Unknown setsockopt name passed: " + name);
+ return -ENOPROTOOPT;
+ }
+ default:
+ if(STDERR_DIAG) System.err.println("Unknown setsockopt leve passed: " + level);
+ return -ENOPROTOOPT;
+ }
+ }
+
+ private int sys_getsockopt(int fdn, int level, int name, int valaddr, int lenaddr) throws ErrnoException, FaultException {
+ SocketFD fd = getSocketFD(fdn);
+ switch(level) {
+ case SOL_SOCKET:
+ switch(name) {
+ case SO_REUSEADDR:
+ case SO_KEEPALIVE: {
+ int len = memRead(lenaddr);
+ if(len < 4) return -EINVAL;
+ int val = (fd.options & name) != 0 ? 1 : 0;
+ memWrite(valaddr,val);
+ memWrite(lenaddr,4);
+ return 0;
+ }
+ default:
+ if(STDERR_DIAG) System.err.println("Unknown setsockopt name passed: " + name);
+ return -ENOPROTOOPT;
+ }
+ default:
+ if(STDERR_DIAG) System.err.println("Unknown setsockopt leve passed: " + level);
+ return -ENOPROTOOPT;
+ }
+ }
+
+ private int sys_bind(int fdn, int addr, int namelen) throws FaultException, ErrnoException {
+ SocketFD fd = getSocketFD(fdn);
+
+ if(fd.type() == SocketFD.TYPE_STREAM && (fd.s != null || fd.ss != null)) return -EISCONN;
+ int word1 = memRead(addr);
+ if( ((word1 >>> 16)&0xff) != AF_INET) return -EAFNOSUPPORT;
+ int port = word1 & 0xffff;
+ InetAddress inetAddr = null;
+ if(memRead(addr+4) != 0) {
+ byte[] ip = new byte[4];
+ copyin(addr+4,ip,4);
+
+ try {
+ inetAddr = Platform.inetAddressFromBytes(ip);
+ } catch(UnknownHostException e) {
+ return -EADDRNOTAVAIL;
+ }
+ }
+
+ switch(fd.type()) {
+ case SocketFD.TYPE_STREAM: {
+ fd.bindAddr = inetAddr;
+ fd.bindPort = port;
+ return 0;
+ }
+ case SocketFD.TYPE_DGRAM: {
+ if(fd.ds != null) fd.ds.close();
+ try {
+ fd.ds = inetAddr != null ? new DatagramSocket(port,inetAddr) : new DatagramSocket(port);
+ } catch(IOException e) {
+ return -EADDRINUSE;
+ }
+ return 0;
+ }
+ default:
+ throw new Error("should never happen");
+ }
+ }
+
+ private int sys_listen(int fdn, int backlog) throws ErrnoException {
+ SocketFD fd = getSocketFD(fdn);
+ if(fd.type() != SocketFD.TYPE_STREAM) return -EOPNOTSUPP;
+ if(fd.ss != null || fd.s != null) return -EISCONN;
+ if(fd.bindPort < 0) return -EOPNOTSUPP;
+
+ try {
+ fd.ss = new ServerSocket(fd.bindPort,backlog,fd.bindAddr);
+ fd.flags |= SocketFD.LISTEN;
+ return 0;
+ } catch(IOException e) {
+ return -EADDRINUSE;
+ }
+
+ }
+
+ private int sys_accept(int fdn, int addr, int lenaddr) throws ErrnoException, FaultException {
+ SocketFD fd = getSocketFD(fdn);
+ if(fd.type() != SocketFD.TYPE_STREAM) return -EOPNOTSUPP;
+ if(!fd.listen()) return -EOPNOTSUPP;
+
+ int size = memRead(lenaddr);
+
+ ServerSocket s = fd.ss;
+ Socket client;
+ try {
+ client = s.accept();
+ } catch(IOException e) {
+ return -EIO;
+ }
+
+ if(size >= 8) {
+ memWrite(addr,(6 << 24) | (AF_INET << 16) | client.getPort());
+ byte[] b = client.getInetAddress().getAddress();
+ copyout(b,addr+4,4);
+ memWrite(lenaddr,8);
+ }
+
+ SocketFD clientFD = new SocketFD(SocketFD.TYPE_STREAM);
+ clientFD.s = client;
+ try {
+ clientFD.is = client.getInputStream();
+ clientFD.os = client.getOutputStream();
+ } catch(IOException e) {
+ return -EIO;
+ }
+ int n = addFD(clientFD);
+ if(n == -1) { clientFD.close(); return -ENFILE; }
+ return n;
+ }
+
+ private int sys_shutdown(int fdn, int how) throws ErrnoException {
+ SocketFD fd = getSocketFD(fdn);
+ if(fd.type() != SocketFD.TYPE_STREAM || fd.listen()) return -EOPNOTSUPP;
+ if(fd.s == null) return -ENOTCONN;
+
+ Socket s = fd.s;
+
+ try {
+ if(how == SHUT_RD || how == SHUT_RDWR) Platform.socketHalfClose(s,false);
+ if(how == SHUT_WR || how == SHUT_RDWR) Platform.socketHalfClose(s,true);
+ } catch(IOException e) {
+ return -EIO;
+ }
+
+ return 0;
+ }
+
+ private int sys_sendto(int fdn, int addr, int count, int flags, int destAddr, int socklen) throws ErrnoException,ReadFaultException {
+ SocketFD fd = getSocketFD(fdn);
+ if(flags != 0) throw new ErrnoException(EINVAL);
+
+ int word1 = memRead(destAddr);
+ if( ((word1 >>> 16)&0xff) != AF_INET) return -EAFNOSUPPORT;
+ int port = word1 & 0xffff;
+ InetAddress inetAddr;
+ byte[] ip = new byte[4];
+ copyin(destAddr+4,ip,4);
+ try {
+ inetAddr = Platform.inetAddressFromBytes(ip);
+ } catch(UnknownHostException e) {
+ return -EADDRNOTAVAIL;
+ }
+
+ count = Math.min(count,MAX_CHUNK);
+ byte[] buf = byteBuf(count);
+ copyin(addr,buf,count);
+ try {
+ return fd.sendto(buf,0,count,inetAddr,port);
+ } catch(ErrnoException e) {
+ if(e.errno == EPIPE) exit(128+13,true);
+ throw e;
+ }
+ }
+
+ private int sys_recvfrom(int fdn, int addr, int count, int flags, int sourceAddr, int socklenAddr) throws ErrnoException, FaultException {
+ SocketFD fd = getSocketFD(fdn);
+ if(flags != 0) throw new ErrnoException(EINVAL);
+
+ InetAddress[] inetAddr = sourceAddr == 0 ? null : new InetAddress[1];
+ int[] port = sourceAddr == 0 ? null : new int[1];
+
+ count = Math.min(count,MAX_CHUNK);
+ byte[] buf = byteBuf(count);
+ int n = fd.recvfrom(buf,0,count,inetAddr,port);
+ copyout(buf,addr,n);
+
+ if(sourceAddr != 0) {
+ memWrite(sourceAddr,(AF_INET << 16) | port[0]);
+ byte[] ip = inetAddr[0].getAddress();
+ copyout(ip,sourceAddr+4,4);
+ }
+
+ return n;
+ }
+
+ private int sys_select(int n, int readFDs, int writeFDs, int exceptFDs, int timevalAddr) throws ReadFaultException, ErrnoException {
+ return -ENOSYS;
+ }
+
+ private static String hostName() {
+ try {
+ return InetAddress.getLocalHost().getHostName();
+ } catch(UnknownHostException e) {
+ return "darkstar";
+ }
+ }
+
+ private int sys_sysctl(int nameaddr, int namelen, int oldp, int oldlenaddr, int newp, int newlen) throws FaultException {
+ if(newp != 0) return -EPERM;
+ if(namelen == 0) return -ENOENT;
+ if(oldp == 0) return 0;
+
+ Object o = null;
+ switch(memRead(nameaddr)) {
+ case CTL_KERN:
+ if(namelen != 2) break;
+ switch(memRead(nameaddr+4)) {
+ case KERN_OSTYPE: o = "NestedVM"; break;
+ case KERN_HOSTNAME: o = hostName(); break;
+ case KERN_OSRELEASE: o = VERSION; break;
+ case KERN_VERSION: o = "NestedVM Kernel Version " + VERSION; break;
+ }
+ break;
+ case CTL_HW:
+ if(namelen != 2) break;
+ switch(memRead(nameaddr+4)) {
+ case HW_MACHINE: o = "NestedVM Virtual Machine"; break;
+ }
+ break;
+ }
+ if(o == null) return -ENOENT;
+ int len = memRead(oldlenaddr);
+ if(o instanceof String) {
+ byte[] b = getNullTerminatedBytes((String)o);
+ if(len < b.length) return -ENOMEM;
+ len = b.length;
+ copyout(b,oldp,len);
+ memWrite(oldlenaddr,len);
+ } else if(o instanceof Integer) {
+ if(len < 4) return -ENOMEM;
+ memWrite(oldp,((Integer)o).intValue());
+ } else {
+ throw new Error("should never happen");
+ }
+ return 0;
+ }
+
+ public static final class GlobalState {
+ Hashtable execCache = new Hashtable();
final UnixRuntime[] tasks;
int nextPID = 1;
if(defaultMounts) {
addMount("/",new HostFS());
addMount("/dev",new DevFS());
+ addMount("/resource",new ResourceFS());
}
}
- private static class MP {
+ static class MP implements Sort.Comparable {
public MP(String path, FS fs) { this.path = path; this.fs = fs; }
public String path;
public FS fs;
MP[] newMPS = new MP[oldLength + 1];
if(oldLength != 0) System.arraycopy(mps,0,newMPS,0,oldLength);
newMPS[oldLength] = new MP(path,fs);
- Arrays.sort(newMPS);
+ Sort.sort(newMPS);
mps = newMPS;
int highdevno = 0;
for(int i=0;i<mps.length;i++) highdevno = max(highdevno,mps[i].fs.devno);
for(int i=0;i<list.length;i++) {
MP mp = list[i];
int mpl = mp.path.length();
- if(normalizedPath.startsWith(mp.path) && (pl == mpl || (pl < mpl && normalizedPath.charAt(mpl) == '/')))
- return dispatch(mp.fs,op,r,pl == mpl ? "" : normalizedPath.substring(mpl+1),arg1,arg2);
+ if(normalizedPath.startsWith(mp.path) && (pl == mpl || normalizedPath.charAt(mpl) == '/'))
+ return mp.fs.dispatch(op,r,pl == mpl ? "" : normalizedPath.substring(mpl+1),arg1,arg2);
}
}
- return dispatch(root,op,r,normalizedPath,arg1,arg2);
+ return root.dispatch(op,r,normalizedPath,arg1,arg2);
}
- private static Object dispatch(FS fs, int op, UnixRuntime r, String path, int arg1, int arg2) throws ErrnoException {
- switch(op) {
- case OPEN: return fs.open(r,path,arg1,arg2);
- case STAT: return fs.stat(r,path);
- case LSTAT: return fs.lstat(r,path);
- case MKDIR: fs.mkdir(r,path,arg1); return null;
- default: throw new Error("should never happen");
- }
- }
+ public final FD open(UnixRuntime r, String path, int flags, int mode) throws ErrnoException { return (FD) fsop(FS.OPEN,r,path,flags,mode); }
+ public final FStat stat(UnixRuntime r, String path) throws ErrnoException { return (FStat) fsop(FS.STAT,r,path,0,0); }
+ public final FStat lstat(UnixRuntime r, String path) throws ErrnoException { return (FStat) fsop(FS.LSTAT,r,path,0,0); }
+ public final void mkdir(UnixRuntime r, String path, int mode) throws ErrnoException { fsop(FS.MKDIR,r,path,mode,0); }
+ public final void unlink(UnixRuntime r, String path) throws ErrnoException { fsop(FS.UNLINK,r,path,0,0); }
- public final FD open(UnixRuntime r, String path, int flags, int mode) throws ErrnoException { return (FD) fsop(OPEN,r,path,flags,mode); }
- public final FStat stat(UnixRuntime r, String path) throws ErrnoException { return (FStat) fsop(STAT,r,path,0,0); }
- public final FStat lstat(UnixRuntime r, String path) throws ErrnoException { return (FStat) fsop(LSTAT,r,path,0,0); }
- public final void mkdir(UnixRuntime r, String path, int mode) throws ErrnoException { fsop(MKDIR,r,path,mode,0); }
-
- private Hashtable execCache = new Hashtable();
private static class CacheEnt {
public final long time;
public final long size;
public final Object o;
public CacheEnt(long time, long size, Object o) { this.time = time; this.size = size; this.o = o; }
}
-
- public synchronized Object exec(UnixRuntime r, String path) throws ErrnoException {
- FStat fstat = stat(r,path);
- if(fstat == null) return null;
- long mtime = fstat.mtime();
- long size = fstat.size();
- CacheEnt ent = (CacheEnt) execCache.get(path);
- if(ent != null) {
- //System.err.println("Found cached entry for " + path);
- if(ent.time == mtime && ent.size == size) return ent.o;
- //System.err.println("Cache was out of date");
- execCache.remove(path);
- }
- FD fd = open(r,path,RD_ONLY,0);
- if(fd == null) return null;
- Seekable s = fd.seekable();
-
- String[] command = null;
-
- if(s == null) throw new ErrnoException(EACCES);
- byte[] buf = new byte[4096];
-
- try {
- int n = s.read(buf,0,buf.length);
- if(n == -1) throw new ErrnoException(ENOEXEC);
-
- switch(buf[0]) {
- case '\177': // possible ELF
- if(n < 4 && s.tryReadFully(buf,n,4-n) != 4-n) throw new ErrnoException(ENOEXEC);
- if(buf[1] != 'E' || buf[2] != 'L' || buf[3] != 'F') throw new ErrnoException(ENOEXEC);
- break;
- case '#':
- if(n == 1) {
- int n2 = s.read(buf,1,buf.length-1);
- if(n2 == -1) throw new ErrnoException(ENOEXEC);
- n += n2;
- }
- if(buf[1] != '!') throw new ErrnoException(ENOEXEC);
- int p = 2;
- n -= 2;
- OUTER: for(;;) {
- for(int i=p;i<p+n;i++) if(buf[i] == '\n') { p = i; break OUTER; }
- p += n;
- if(p == buf.length) break OUTER;
- n = s.read(buf,p,buf.length-p);
- }
- command = new String[2];
- int arg;
- for(arg=2;arg<p;arg++) if(buf[arg] == ' ') break;
- if(arg < p) {
- int cmdEnd = arg;
- while(arg < p && buf[arg] == ' ') arg++;
- command[0] = new String(buf,2,cmdEnd);
- command[1] = arg < p ? new String(buf,arg,p-arg) : null;
- } else {
- command[0] = new String(buf,2,p-2);
- }
- //System.err.println("command[0]: " + command[0] + " command[1]: " + command[1]);
- break;
- default:
- throw new ErrnoException(ENOEXEC);
- }
- } catch(IOException e) {
- fd.close();
- throw new ErrnoException(EIO);
- }
-
- if(command == null) {
- // its an elf binary
- try {
- s.seek(0);
- Class c = RuntimeCompiler.compile(s);
- //System.err.println("Compile succeeded: " + c);
- ent = new CacheEnt(mtime,size,c);
- } catch(Compiler.Exn e) {
- if(STDERR_DIAG) e.printStackTrace();
- throw new ErrnoException(ENOEXEC);
- } catch(IOException e) {
- if(STDERR_DIAG) e.printStackTrace();
- throw new ErrnoException(EIO);
- }
- } else {
- ent = new CacheEnt(mtime,size,command);
- }
-
- fd.close();
-
- execCache.put(path,ent);
- return ent.o;
- }
}
public abstract static class FS {
+ static final int OPEN = 1;
+ static final int STAT = 2;
+ static final int LSTAT = 3;
+ static final int MKDIR = 4;
+ static final int UNLINK = 5;
+
GlobalState owner;
int devno;
+ Object dispatch(int op, UnixRuntime r, String path, int arg1, int arg2) throws ErrnoException {
+ switch(op) {
+ case OPEN: return open(r,path,arg1,arg2);
+ case STAT: return stat(r,path);
+ case LSTAT: return lstat(r,path);
+ case MKDIR: mkdir(r,path,arg1); return null;
+ case UNLINK: unlink(r,path); return null;
+ default: throw new Error("should never happen");
+ }
+ }
+
public FStat lstat(UnixRuntime r, String path) throws ErrnoException { return stat(r,path); }
// If this returns null it'll be truned into an ENOENT
// If this returns null it'll be turned into an ENOENT
public abstract FStat stat(UnixRuntime r, String path) throws ErrnoException;
public abstract void mkdir(UnixRuntime r, String path, int mode) throws ErrnoException;
+ public abstract void unlink(UnixRuntime r, String path) throws ErrnoException;
}
- // FEATURE: chroot support in here
+ // chroot support should go in here if it is ever implemented chroot support in here
private String normalizePath(String path) {
boolean absolute = path.startsWith("/");
int cwdl = cwd.length();
+
// NOTE: This isn't just a fast path, it handles cases the code below doesn't
if(!path.startsWith(".") && path.indexOf("./") == -1 && path.indexOf("//") == -1 && !path.endsWith("."))
return absolute ? path.substring(1) : cwdl == 0 ? path : path.length() == 0 ? cwd : cwd + "/" + path;
char[] in = new char[path.length()+1];
char[] out = new char[in.length + (absolute ? -1 : cwd.length())];
+ path.getChars(0,path.length(),in,0);
int inp=0, outp=0;
if(absolute) {
cwd.getChars(0,cwdl,out,0);
outp = cwdl;
}
-
- path.getChars(0,path.length(),in,0);
+
while(in[inp] != 0) {
if(inp != 0) {
- if(in[inp] != '/') { out[outp++] = in[inp++]; continue; }
+ while(in[inp] != 0 && in[inp] != '/') { out[outp++] = in[inp++]; }
+ if(in[inp] == '\0') break;
while(in[inp] == '/') inp++;
}
- if(in[inp] == '\0') continue;
+
+ // Just read a /
+ if(in[inp] == '\0') break;
if(in[inp] != '.') { out[outp++] = '/'; out[outp++] = in[inp++]; continue; }
+ // Just read a /.
if(in[inp+1] == '\0' || in[inp+1] == '/') { inp++; continue; }
if(in[inp+1] == '.' && (in[inp+2] == '\0' || in[inp+2] == '/')) { // ..
+ // Just read a /..{$,/}
inp += 2;
if(outp > 0) outp--;
while(outp > 0 && out[outp] != '/') outp--;
//System.err.println("After ..: " + new String(out,0,outp));
continue;
}
+ // Just read a /.[^.] or /..[^/$]
inp++;
out[outp++] = '/';
out[outp++] = '.';
}
if(outp > 0 && out[outp-1] == '/') outp--;
//System.err.println("normalize: " + path + " -> " + new String(out,0,outp) + " (cwd: " + cwd + ")");
- return new String(out,0,outp);
+ int outStart = out[0] == '/' ? 1 : 0;
+ return new String(out,outStart,outp - outStart);
}
FStat hostFStat(final File f, Object data) {
protected File root;
public File getRoot() { return root; }
- private static File hostRootDir() {
- String cwd = getSystemProperty("user.dir");
+ static File hostRootDir() {
+ if(Platform.getProperty("nestedvm.root") != null) {
+ File f = new File(Platform.getProperty("nestedvm.root"));
+ if(f.isDirectory()) return f;
+ // fall through to case below
+ }
+ String cwd = Platform.getProperty("user.dir");
File f = new File(cwd != null ? cwd : ".");
+ if(!f.exists()) throw new Error("Couldn't get File for cwd");
f = new File(f.getAbsolutePath());
while(f.getParent() != null) f = new File(f.getParent());
+ // This works around a bug in some versions of ClassPath
+ if(f.getPath().length() == 0) f = new File("/");
return f;
}
+ static String reverseMap(String f) {
+ if(f.startsWith("/") && File.separatorChar == '/') return f;
+
+ Vector vec = new Vector();
+ File root = HostFS.hostRootDir();
+ String s = new File(f).getAbsolutePath();
+ File d = new File(s);
+ System.err.println(s);
+ System.err.println(d);
+ while(!d.equals(root)) {
+ vec.addElement(d.getName());
+ if((s = d.getParent()) == null) break;
+ d = new File(s);
+ }
+ String ret = null;
+ if(s != null) {
+ ret="/";
+ for(int i=vec.size()-1;i>=0;i--) ret += (String) vec.elementAt(i) + (i==0?"":"/");
+ }
+ System.err.println("reverseMap: " + f + " => " + ret);
+ return ret;
+ }
+
private File hostFile(String path) {
char sep = File.separatorChar;
if(sep != '/') {
return r.hostFSOpen(f,flags,mode,this);
}
+ public void unlink(UnixRuntime r, String path) throws ErrnoException {
+ File f = hostFile(path);
+ if(r.sm != null && !r.sm.allowUnlink(f)) throw new ErrnoException(EPERM);
+ if(!f.exists()) throw new ErrnoException(ENOENT);
+ if(!f.delete()) throw new ErrnoException(EPERM);
+ }
+
public FStat stat(UnixRuntime r, String path) throws ErrnoException {
File f = hostFile(path);
if(r.sm != null && !r.sm.allowStat(f)) throw new ErrnoException(EACCES);
if(r.sm != null && !r.sm.allowWrite(f)) throw new ErrnoException(EACCES);
if(f.exists() && f.isDirectory()) throw new ErrnoException(EEXIST);
if(f.exists()) throw new ErrnoException(ENOTDIR);
- File parent = f.getParentFile();
+ File parent = getParentFile(f);
if(parent!=null && (!parent.exists() || !parent.isDirectory())) throw new ErrnoException(ENOTDIR);
if(!f.mkdir()) throw new ErrnoException(EIO);
}
+ private static File getParentFile(File f) {
+ String p = f.getParent();
+ return p == null ? null : new File(p);
+ }
+
public class HostDirFD extends DirFD {
private final File f;
private final File[] children;
- public HostDirFD(File f) { this.f = f; children = f.listFiles(); }
+ public HostDirFD(File f) {
+ this.f = f;
+ String[] l = f.list();
+ children = new File[l.length];
+ for(int i=0;i<l.length;i++) children[i] = new File(f,l[i]);
+ }
public int size() { return children.length; }
public String name(int n) { return children[n].getName(); }
public int inode(int n) { return inodes.get(children[n].getAbsolutePath()); }
public int parentInode() {
- File parent = f.getParentFile();
- return parent == null ? -1 : inodes.get(parent.getAbsolutePath());
+ File parent = getParentFile(f);
+ // HACK: myInode() isn't really correct if we're not the root
+ return parent == null ? myInode() : inodes.get(parent.getAbsolutePath());
}
public int myInode() { return inodes.get(f.getAbsolutePath()); }
public int myDev() { return devno; }
protected abstract String name(int n);
protected abstract int inode(int n);
protected abstract int myDev();
- protected int parentInode() { return -1; }
- protected int myInode() { return -1; }
-
+ protected abstract int parentInode();
+ protected abstract int myInode();
+ public int flags() { return O_RDONLY; }
+
public int getdents(byte[] buf, int off, int len) {
int ooff = off;
int ino;
private static final int FD_INODE = 4;
private static final int FD_INODES = 32;
- private class DevFStat extends FStat {
+ private abstract class DevFStat extends FStat {
public int dev() { return devno; }
public int mode() { return 0666; }
public int type() { return S_IFCHR; }
public int nlink() { return 1; }
+ public abstract int inode();
}
private abstract class DevDirFD extends DirFD {
}
private FD devZeroFD = new FD() {
- public boolean readable() { return true; }
- public boolean writable() { return true; }
- public int read(byte[] a, int off, int length) { Arrays.fill(a,off,off+length,(byte)0); return length; }
+ public int read(byte[] a, int off, int length) {
+ /*Arrays.fill(a,off,off+length,(byte)0);*/
+ for(int i=off;i<off+length;i++) a[i] = 0;
+ return length;
+ }
public int write(byte[] a, int off, int length) { return length; }
public int seek(int n, int whence) { return 0; }
public FStat _fstat() { return new DevFStat(){ public int inode() { return ZERO_INODE; } }; }
+ public int flags() { return O_RDWR; }
};
private FD devNullFD = new FD() {
- public boolean readable() { return true; }
- public boolean writable() { return true; }
public int read(byte[] a, int off, int length) { return 0; }
public int write(byte[] a, int off, int length) { return length; }
public int seek(int n, int whence) { return 0; }
public FStat _fstat() { return new DevFStat(){ public int inode() { return NULL_INODE; } }; }
+ public int flags() { return O_RDWR; }
};
public FD open(UnixRuntime r, String path, int mode, int flags) throws ErrnoException {
if(path.equals("")) {
return new DevDirFD() {
public int myInode() { return ROOT_INODE; }
- // FEATURE: Get the real parent inode somehow
- public int parentInode() { return -1; }
+ // HACK: We don't have any clean way to get the parent inode
+ public int parentInode() { return ROOT_INODE; }
public int inode(int n) {
switch(n) {
case 0: return NULL_INODE;
if(path.startsWith("fd/")) {
int n;
try {
- n = Integer.parseInt(path.substring(4));
+ n = Integer.parseInt(path.substring(3));
} catch(NumberFormatException e) {
return null;
}
if(r.fds[n] == null) return null;
return r.fds[n].fstat();
}
- // FEATURE: inode stuff
- if(path.equals("fd")) return new FStat() { public int type() { return S_IFDIR; } public int mode() { return 0444; }};
- if(path.equals("")) return new FStat() { public int type() { return S_IFDIR; } public int mode() { return 0444; }};
+ if(path.equals("fd")) return new FStat() { public int inode() { return FD_INODE; } public int dev() { return devno; } public int type() { return S_IFDIR; } public int mode() { return 0444; }};
+ if(path.equals("")) return new FStat() { public int inode() { return ROOT_INODE; } public int dev() { return devno; } public int type() { return S_IFDIR; } public int mode() { return 0444; }};
return null;
}
- public void mkdir(UnixRuntime r, String path, int mode) throws ErrnoException { throw new ErrnoException(EACCES); }
+ public void mkdir(UnixRuntime r, String path, int mode) throws ErrnoException { throw new ErrnoException(EROFS); }
+ public void unlink(UnixRuntime r, String path) throws ErrnoException { throw new ErrnoException(EROFS); }
+ }
+
+
+ public static class ResourceFS extends FS {
+ final InodeCache inodes = new InodeCache(500);
+
+ public FStat lstat(UnixRuntime r, String path) throws ErrnoException { return stat(r,path); }
+ public void mkdir(UnixRuntime r, String path, int mode) throws ErrnoException { throw new ErrnoException(EROFS); }
+ public void unlink(UnixRuntime r, String path) throws ErrnoException { throw new ErrnoException(EROFS); }
+
+ FStat connFStat(final URLConnection conn) {
+ return new FStat() {
+ public int type() { return S_IFREG; }
+ public int nlink() { return 1; }
+ public int mode() { return 0444; }
+ public int size() { return conn.getContentLength(); }
+ public int mtime() { return (int)(conn.getDate() / 1000); }
+ public int inode() { return inodes.get(conn.getURL().toString()); }
+ public int dev() { return devno; }
+ };
+ }
+
+ public FStat stat(UnixRuntime r, String path) throws ErrnoException {
+ URL url = r.getClass().getResource("/" + path);
+ if(url == null) return null;
+ try {
+ return connFStat(url.openConnection());
+ } catch(IOException e) {
+ throw new ErrnoException(EIO);
+ }
+ }
+
+ public FD open(UnixRuntime r, String path, int flags, int mode) throws ErrnoException {
+ if((flags & ~3) != 0) {
+ if(STDERR_DIAG)
+ System.err.println("WARNING: Unsupported flags passed to ResourceFS.open(\"" + path + "\"): " + toHex(flags & ~3));
+ throw new ErrnoException(ENOTSUP);
+ }
+ if((flags&3) != RD_ONLY) throw new ErrnoException(EROFS);
+ URL url = r.getClass().getResource("/" + path);
+ if(url == null) return null;
+ try {
+ final URLConnection conn = url.openConnection();
+ Seekable.InputStream si = new Seekable.InputStream(conn.getInputStream());
+ return new SeekableFD(si,flags) { protected FStat _fstat() { return connFStat(conn); } };
+ } catch(FileNotFoundException e) {
+ if(e.getMessage() != null && e.getMessage().indexOf("Permission denied") >= 0) throw new ErrnoException(EACCES);
+ return null;
+ } catch(IOException e) { throw new ErrnoException(EIO); }
+ }
}
}
projects / nestedvm.git / blobdiff