+// 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.*;
-// FEATURE: This is ugly, this stuff needs to be in org.ibex.util or something
+// 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
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;
}
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);
+
default: return super._syscall(syscall,a,b,c,d,e,f);
}
}
private int sys_getppid() {
return parent == null ? 1 : parent.pid;
}
+
+
+ private int sys_access(int cstring, int mode) {
+ // FEATURE: sys_access
+ return 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
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) {
}
private int sys_fork() {
- CPUState state = new CPUState();
- getCPUState(state);
- int sp = state.r[SP];
final UnixRuntime r;
try {
}
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});
+ } catch(NoSuchMethodException e) {
+ m = null;
+ } catch(ClassNotFoundException e) {
+ m = null;
+ }
+ runtimeCompilerCompile = m;
+ }
+
+ public Class runtimeCompile(Seekable s) 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"});
+ } 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[]{""};
-
+ // 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); }*/
- Object o = gs.exec(this,normalizedPath);
- if(o == null) return -ENOENT;
-
- if(o instanceof Class) {
- Class c = (Class) o;
- 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;
+ 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);
+ Class c = runtimeCompile(s);
+ 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 arg;
+ for(arg=2;arg<p;arg++) if(buf[arg] == ' ') break;
+ int cmdEnd = arg;
+ while(arg < p && buf[arg] == ' ') arg++;
+ String[] command = new String[] {
+ new String(buf,2,cmdEnd),
+ arg < p ? new String(buf,arg,p-arg) : 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 + 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++] = "/" + path;
+ for(int i=1;i<argv.length;i++) newArgv[p++] = argv[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 n;
}
- // FEATURE: UDP is totally broken
-
static class SocketFD extends FD {
public static final int TYPE_STREAM = 0;
public static final int TYPE_DGRAM = 1;
int flags;
int options;
- Object o;
+
+ Socket s;
+ ServerSocket ss;
+ DatagramSocket ds;
+
InetAddress bindAddr;
int bindPort = -1;
+ InetAddress connectAddr;
+ int connectPort = -1;
+
DatagramPacket dp;
InputStream is;
OutputStream os;
- public SocketFD(int type) { flags = type; }
+ 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(o != null && type() == TYPE_STREAM && !listen()) {
- Platform.socketSetKeepAlive((Socket)o,(options & SO_KEEPALIVE) != 0);
+ 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() {
- if(o != null) {
- try {
- if(type() == TYPE_STREAM) {
- if(listen()) ((ServerSocket)o).close();
- else ((Socket)o).close();
- } else {
- ((DatagramSocket)o).close();
- }
- } catch(IOException e) {
- /* ignore */
- }
+ 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_STREAM) {
- 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);
- }
- } else {
- if(off != 0) throw new IllegalArgumentException("off must be 0");
- DatagramSocket ds = (DatagramSocket) o;
- dp.setData(a);
- dp.setLength(length);
- try {
- ds.receive(dp);
- } catch(IOException e) {
- throw new ErrnoException(EIO);
- }
- return dp.getLength();
+ 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_STREAM) {
- if(os == null) throw new ErrnoException(EPIPE);
- try {
- os.write(a,off,length);
- return length;
- } catch(IOException e) {
- throw new ErrnoException(EIO);
- }
- } else {
- if(off != 0) throw new IllegalArgumentException("off must be 0");
- DatagramSocket ds = (DatagramSocket) o;
- dp.setData(a);
- dp.setLength(length);
- try {
- ds.send(dp);
- } catch(IOException e) {
- throw new ErrnoException(EIO);
- }
- return dp.getLength();
+ 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_connect(int fdn, int addr, int namelen) throws ErrnoException, FaultException {
SocketFD fd = getSocketFD(fdn);
- if(fd.type() == SocketFD.TYPE_STREAM && fd.o != null) return -EISCONN;
+ 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;
return -EADDRNOTAVAIL;
}
+ fd.connectAddr = inetAddr;
+ fd.connectPort = port;
+
try {
switch(fd.type()) {
case SocketFD.TYPE_STREAM: {
Socket s = new Socket(inetAddr,port);
- fd.o = s;
+ fd.s = s;
fd.setOptions();
fd.is = s.getInputStream();
fd.os = s.getOutputStream();
break;
}
- case SocketFD.TYPE_DGRAM: {
- if(fd.dp == null) fd.dp = new DatagramPacket(null,0);
- fd.dp.setAddress(inetAddr);
- fd.dp.setPort(port);
+ case SocketFD.TYPE_DGRAM:
break;
- }
default:
throw new Error("should never happen");
}
private int sys_bind(int fdn, int addr, int namelen) throws FaultException, ErrnoException {
SocketFD fd = getSocketFD(fdn);
- if(fd.type() == SocketFD.TYPE_STREAM && fd.o != null) return -EISCONN;
+ 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;
return 0;
}
case SocketFD.TYPE_DGRAM: {
- DatagramSocket s = (DatagramSocket) fd.o;
- if(s != null) s.close();
+ if(fd.ds != null) fd.ds.close();
try {
- fd.o = inetAddr != null ? new DatagramSocket(port,inetAddr) : new DatagramSocket(port);
+ fd.ds = inetAddr != null ? new DatagramSocket(port,inetAddr) : new DatagramSocket(port);
} catch(IOException e) {
return -EADDRINUSE;
}
private int sys_listen(int fdn, int backlog) throws ErrnoException {
SocketFD fd = getSocketFD(fdn);
if(fd.type() != SocketFD.TYPE_STREAM) return -EOPNOTSUPP;
- if(fd.o != null) return -EISCONN;
+ if(fd.ss != null || fd.s != null) return -EISCONN;
if(fd.bindPort < 0) return -EOPNOTSUPP;
try {
- fd.o = new ServerSocket(fd.bindPort,backlog,fd.bindAddr);
+ fd.ss = new ServerSocket(fd.bindPort,backlog,fd.bindAddr);
fd.flags |= SocketFD.LISTEN;
return 0;
} catch(IOException e) {
int size = memRead(lenaddr);
- ServerSocket s = (ServerSocket) fd.o;
+ ServerSocket s = fd.ss;
Socket client;
try {
client = s.accept();
}
SocketFD clientFD = new SocketFD(SocketFD.TYPE_STREAM);
- clientFD.o = client;
+ clientFD.s = client;
try {
clientFD.is = client.getInputStream();
clientFD.os = client.getOutputStream();
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.o == null) return -ENOTCONN;
+ if(fd.s == null) return -ENOTCONN;
- Socket s = (Socket) fd.o;
+ Socket s = fd.s;
try {
if(how == SHUT_RD || how == SHUT_RDWR) Platform.socketHalfClose(s,false);
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();
return 0;
}
- // 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;
- protected static final int UNLINK = 5;
+ public static final class GlobalState {
+ Hashtable execCache = new Hashtable();
final UnixRuntime[] tasks;
int nextPID = 1;
}
}
- private static class MP implements Sort.Comparable {
+ static class MP implements Sort.Comparable {
public MP(String path, FS fs) { this.path = path; this.fs = fs; }
public String path;
public FS fs;
mps = newMPS;
}
- // FEATURE: We shouldn't need to special case the root dir, it should work in the MP array
private Object fsop(int op, UnixRuntime r, String normalizedPath, int arg1, int arg2) throws ErrnoException {
int pl = normalizedPath.length();
if(pl != 0) {
MP mp = list[i];
int mpl = mp.path.length();
if(normalizedPath.startsWith(mp.path) && (pl == mpl || normalizedPath.charAt(mpl) == '/'))
- return dispatch(mp.fs,op,r,pl == mpl ? "" : normalizedPath.substring(mpl+1),arg1,arg2);
+ return mp.fs.dispatch(op,r,pl == mpl ? "" : normalizedPath.substring(mpl+1),arg1,arg2);
}
}
- return dispatch(root,op,r,normalizedPath,arg1,arg2);
- }
-
- // FEATURE: move this into FS so some filesystem can override it directly (devfs)
- 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;
- case UNLINK: fs.unlink(r,path); return null;
- default: throw new Error("should never happen");
- }
+ return root.dispatch(op,r,normalizedPath,arg1,arg2);
}
- 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); }
- public final void unlink(UnixRuntime r, String path) throws ErrnoException { fsop(UNLINK,r,path,0,0); }
+ 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); }
- 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 {
- // HACK: Hideous hack to make a standalone busybox possible
- if(path.equals("bin/busybox") && r.getClass().getName().endsWith("BusyBox")) return r.getClass();
-
- 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,"unixruntime");
- //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(!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());
- // HACK: This works around a bug in some versions of ClassPath
+ // This works around a bug in some versions of ClassPath
if(f.getPath().length() == 0) f = new File("/");
return f;
}
public int inode(int n) { return inodes.get(children[n].getAbsolutePath()); }
public int parentInode() {
File parent = getParentFile(f);
- return parent == null ? -1 : inodes.get(parent.getAbsolutePath());
+ // 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; }
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;