+// Copyright 2000-2005 the Contributors, as shown in the revision logs.
+// Licensed under the Apache 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.*;
import java.io.*;
import java.util.*;
+import java.net.*;
+import java.lang.reflect.*; // For lazily linked RuntimeCompiler
-// FEATURE: BusyBox's ASH doesn't like \r\n at the end of lines
-// is ash just broken or are many apps like this? if so workaround in nestedvm
-
-// FEATURE: Throw ErrnoException and catch in syscall whereever possible
-// (only in cases where we've already paid the price for a throw)
+// FEATURE: vfork
public abstract class UnixRuntime extends Runtime implements Cloneable {
/** The pid of this "process" */
private int pid;
- private int ppid;
- protected int getPid() { return pid; }
+ private UnixRuntime parent;
+ public final int getPid() { return pid; }
- /** processes filesystem */
- private FS fs;
- public FS getFS() { return fs; }
- public void setFS(FS fs) {
- if(state != STOPPED) throw new IllegalStateException("Can't change fs while process is running");
- this.fs = fs;
+ private static final GlobalState defaultGS = new GlobalState();
+ 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;
}
/** proceses' current working directory - absolute path WITHOUT leading slash
/** The runtime that should be run next when in state == EXECED */
private UnixRuntime execedRuntime;
+
+ private Object children; // used only for synchronizatin
+ private Vector activeChildren;
+ private Vector exitedChildren;
- /* Static stuff */
- // FEATURE: Most of this is O(n) or worse - fix it
- private final Object waitNotification = new Object();
- private final static int MAX_TASKS = 256;
- private final static UnixRuntime[] tasks = new UnixRuntime[MAX_TASKS];
- private static int addTask(UnixRuntime rt) {
- synchronized(tasks) {
- for(int i=1;i<MAX_TASKS;i++) {
- if(tasks[i] == null) {
- tasks[i] = rt;
- rt.pid = i;
- return i;
- }
- }
- return -1;
- }
- }
- private static void removeTask(UnixRuntime rt) {
- synchronized(tasks) {
- for(int i=1;i<MAX_TASKS;i++)
- if(tasks[i] == rt) { tasks[i] = null; break; }
+ protected UnixRuntime(int pageSize, int totalPages) { this(pageSize,totalPages,false); }
+ protected UnixRuntime(int pageSize, int totalPages, boolean exec) {
+ super(pageSize,totalPages,exec);
+
+ if(!exec) {
+ gs = defaultGS;
+ String userdir = Platform.getProperty("user.dir");
+ cwd = userdir == null ? null : gs.mapHostPath(userdir);
+ if(cwd == null) cwd = "/";
+ cwd = cwd.substring(1);
}
}
- public UnixRuntime(int pageSize, int totalPages) {
- super(pageSize,totalPages);
-
- FS root = new HostFS();
- FS dev = new DevFS();
- MountPointFS mounts = new MountPointFS(root);
- mounts.add("/dev",dev);
- fs = mounts;
-
- // FEATURE: Do the proper mangling for non-unix hosts
- String userdir = getSystemProperty("user.dir");
- cwd = userdir != null && userdir.startsWith("/") && File.separatorChar == '/' ? userdir.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();
}
return false;
}
- protected String[] createEnv(String[] extra) {
- String[] defaults = new String[5];
+ String[] createEnv(String[] extra) {
+ 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.name") != 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=gs.mapHostPath(tmp)) != null)
+ defaults[n++] = "HOME=" + tmp;
+ if(!envHas("TMPDIR",extra) && (tmp=Platform.getProperty("java.io.tmpdir")) != null && (tmp=gs.mapHostPath(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];
return env;
}
- protected void _start() {
- if(addTask(this) < 0) throw new Error("Task list full");
- }
+ private static class ProcessTableFullExn extends RuntimeException { }
- protected void _exit() {
- synchronized(tasks) {
- if(ppid == 0) removeTask(this);
- for(int i=0;i<MAX_TASKS;i++) {
- if(tasks[i] != null && tasks[i].ppid == pid) {
- if(tasks[i].state == EXITED) removeTask(tasks[i]);
- else tasks[i].ppid = 0;
+ void _started() {
+ UnixRuntime[] tasks = gs.tasks;
+ synchronized(gs) {
+ if(pid != 0) {
+ 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;
+ gs.nextPID = newpid + 1;
}
- state = EXITED;
- if(ppid != 0) synchronized(tasks[ppid].waitNotification) { tasks[ppid].waitNotification.notify(); }
+ tasks[pid] = this;
}
}
-
- protected int syscall(int syscall, int a, int b, int c, int d) {
+
+ 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_pipe: return sys_pipe(a);
case SYS_dup2: return sys_dup2(a,b);
+ case SYS_dup: return sys_dup(a);
case SYS_waitpid: return sys_waitpid(a,b,c);
case SYS_stat: return sys_stat(a,b);
+ case SYS_lstat: return sys_lstat(a,b);
case SYS_mkdir: return sys_mkdir(a,b);
case SYS_getcwd: return sys_getcwd(a,b);
case SYS_chdir: return sys_chdir(a);
- case SYS_execve: return sys_execve(a,b,c);
-
- default: return super.syscall(syscall,a,b,c,d);
+ case SYS_exec: return sys_exec(a,b,c);
+ case SYS_getdents: return sys_getdents(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_fcntl: return sys_fcntl_lock(a,b,c);
+ case SYS_umask: return sys_umask(a);
+
+ default: return super._syscall(syscall,a,b,c,d,e,f);
}
}
- protected FD open(String path, int flags, int mode) throws IOException {
- return fs.open(normalizePath(path),flags,mode);
+ FD _open(String path, int flags, int mode) throws ErrnoException {
+ path = normalizePath(path);
+ FD fd = gs.open(this,path,flags,mode);
+ if (fd != null && path != null) fd.setNormalizedPath(path);
+ return fd;
+ }
+
+ 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: Allow simple, broken signal delivery to other processes
- // (check if a signal was delivered before and after syscalls)
- // FEATURE: Implement raise() in terms of call("raise",...) - kinda cheap, but it keeps the complexity in newlib
+ // 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;
}
- private int sys_waitpid(int pid, int statusAddr, int options) {
+ private int sys_waitpid(int pid, int statusAddr, int options) throws FaultException, ErrnoException {
final int WNOHANG = 1;
if((options & ~(WNOHANG)) != 0) return -EINVAL;
- if(pid !=-1 && (pid <= 0 || pid >= MAX_TASKS)) return -ECHILD;
- for(;;) {
- synchronized(tasks) {
- UnixRuntime task = null;
+ if(pid == 0 || pid < -1) {
+ if(STDERR_DIAG) System.err.println("WARNING: waitpid called with a pid of " + pid);
+ return -ECHILD;
+ }
+ boolean blocking = (options&WNOHANG)==0;
+
+ if(pid !=-1 && (pid <= 0 || pid >= gs.tasks.length)) return -ECHILD;
+ if(children == null) return blocking ? -ECHILD : 0;
+
+ UnixRuntime done = null;
+
+ synchronized(children) {
+ for(;;) {
if(pid == -1) {
- for(int i=0;i<MAX_TASKS;i++) {
- if(tasks[i] != null && tasks[i].ppid == this.pid && tasks[i].state == EXITED) {
- task = tasks[i];
- break;
- }
+ if(exitedChildren.size() > 0) {
+ done = (UnixRuntime)exitedChildren.elementAt(exitedChildren.size() - 1);
+ exitedChildren.removeElementAt(exitedChildren.size() - 1);
}
- } else if(tasks[pid] != null && tasks[pid].ppid == this.pid && tasks[pid].state == EXITED) {
- task = tasks[pid];
- }
-
- if(task != null) {
- removeTask(task);
- try {
- if(statusAddr!=0) memWrite(statusAddr,task.exitStatus()<<8);
- } catch(FaultException e) {
- return -EFAULT;
+ } 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.removeElement(t)) throw new Error("should never happen");
+ done = t;
}
-
- return task.pid;
+ } else {
+ // process group stuff, EINVAL returned above
+ throw new Error("should never happen");
+ }
+ if(done == null) {
+ if(!blocking) return 0;
+ try { children.wait(); } catch(InterruptedException e) {}
+ //System.err.println("waitpid woke up: " + exitedChildren.size());
+ } else {
+ gs.tasks[done.pid] = null;
+ break;
}
}
- if((options&WNOHANG)!=0) return 0;
- synchronized(waitNotification) {
- try { waitNotification.wait(); } catch(InterruptedException e) { /* ignore */ }
+ }
+ if(statusAddr!=0) memWrite(statusAddr,done.exitStatus()<<8);
+ return done.pid;
+ }
+
+
+ void _exited() {
+ if(children != null) synchronized(children) {
+ for(Enumeration e = exitedChildren.elements(); e.hasMoreElements(); ) {
+ UnixRuntime child = (UnixRuntime) e.nextElement();
+ gs.tasks[child.pid] = null;
+ }
+ exitedChildren.removeAllElements();
+ for(Enumeration e = activeChildren.elements(); e.hasMoreElements(); ) {
+ UnixRuntime child = (UnixRuntime) e.nextElement();
+ child.parent = null;
+ }
+ activeChildren.removeAllElements();
+ }
+
+ UnixRuntime _parent = parent;
+ if(_parent == null) {
+ gs.tasks[pid] = null;
+ } else {
+ synchronized(_parent.children) {
+ if(parent == null) {
+ gs.tasks[pid] = null;
+ } else {
+ if(!parent.activeChildren.removeElement(this)) throw new Error("should never happen _exited: pid: " + pid);
+ parent.exitedChildren.addElement(this);
+ parent.children.notify();
+ }
}
}
}
protected Object clone() throws CloneNotSupportedException {
- UnixRuntime r = (UnixRuntime) super.clone();
- r.pid = r.ppid = 0;
+ UnixRuntime r = (UnixRuntime) super.clone();
+ r.pid = 0;
+ r.parent = null;
+ r.children = null;
+ r.activeChildren = r.exitedChildren = null;
return r;
}
private int sys_fork() {
- CPUState state = new CPUState();
- getCPUState(state);
- int sp = state.r[SP];
final UnixRuntime r;
try {
e.printStackTrace();
return -ENOMEM;
}
+
+ r.parent = this;
+
+ try {
+ r._started();
+ } catch(ProcessTableFullExn e) {
+ return -ENOMEM;
+ }
+
+ //System.err.println("fork " + pid + " -> " + r.pid + " tasks[" + r.pid + "] = " + gd.tasks[r.pid]);
+ if(children == null) {
+ children = new Object();
+ activeChildren = new Vector();
+ exitedChildren = new Vector();
+ }
+ activeChildren.addElement(r);
- int childPID = addTask(r);
- if(childPID < 0) return -ENOMEM;
-
- r.ppid = pid;
-
+ CPUState state = new CPUState();
+ getCPUState(state);
state.r[V0] = 0; // return 0 to child
state.pc += 4; // skip over syscall instruction
r.setCPUState(state);
r.state = PAUSED;
- new Thread() {
- public void run() {
- try {
- while(!r.execute());
- } catch(Exception e) {
- System.err.println("Forked process threw exception: ");
- e.printStackTrace();
- }
- }
- }.start();
+ new ForkedProcess(r);
- return childPID;
+ return r.pid;
+ }
+
+ public static final class ForkedProcess extends Thread {
+ private final UnixRuntime initial;
+ public ForkedProcess(UnixRuntime initial) { this.initial = initial; start(); }
+ public void run() { UnixRuntime.executeAndExec(initial); }
}
public static int runAndExec(UnixRuntime r, String argv0, String[] rest) { return runAndExec(r,concatArgv(argv0,rest)); }
public static int runAndExec(UnixRuntime r, String[] argv) { r.start(argv); return executeAndExec(r); }
public static int executeAndExec(UnixRuntime r) {
- for(;;) {
+ for(;;) {
for(;;) {
if(r.execute()) break;
- System.err.println("WARNING: Pause requested while executing runAndExec()");
+ if(STDERR_DIAG) System.err.println("WARNING: Pause requested while executing runAndExec()");
}
if(r.state != EXECED) return r.exitStatus();
r = r.execedRuntime;
}
private String[] readStringArray(int addr) throws ReadFaultException {
- int count = 0;
+ int count = 0;
for(int p=addr;memRead(p) != 0;p+=4) count++;
String[] a = new String[count];
for(int i=0,p=addr;i<count;i++,p+=4) a[i] = cstring(memRead(p));
return a;
}
- // FEATURE: call the syscall just "exec"
- private int sys_execve(int cpath, int cargv, int cenvp) {
+ 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 {
- return exec(normalizePath(cstring(cpath)),readStringArray(cargv),readStringArray(cenvp));
- } catch(FaultException e) {
- return -EFAULT;
+ 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;
}
-
- private int exec(String path, String[] argv, String[] envp) {
- final UnixRuntime r;
+
+ 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;
+ }
- throw new Error("FIXME exec() not finished");
- //Class klass = fs.getClass(path);
- //if(klass != null) return exec(klass,argv,envp);
+ 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 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 {
- Seekable s = fs.getSeekable(path);
- boolean elf = false;
- boolean script = false;
- switch(s.read()) {
- case '\177': elf = s.read() == 'E' && s.read() == 'L' && s.read() == 'F'; break;
- case '#': script = s.read() == '!';
- }
- s.close();
- if(script) {
- // FIXME #! support
- throw new Error("FIXME can't exec scripts yet");
- // append args, etc
- // return exec(...)
- } else if(elf) {
- klass = fs.(path);
- if(klass == null) return -ENOEXEC;
- return exec(klass,argv,envp);
- } else {
- return -ENOEXEC;
+ 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");
}
- }*/
- // FEATURE: Way too much overlap in the handling of ioexeptions everhwere
- /*catch(ErrnoException e) { return -e.errno; }
- catch(FileNotFoundException e) {
- if(e.getMessage() != null && e.getMessage().indexOf("Permission denied") >= 0) return -EACCES;
- return -ENOENT;
+ //System.err.println("Cache was out of date");
+ gs.execCache.remove(path);
}
- catch(IOException e) { return -EIO; }
- catch(FaultException e) { return -EFAULT; }*/
+
+ 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();
+ }
}
- private int exec(Class c, String[] argv, String[] envp) {
- UnixRuntime r;
-
+ 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 {
- r = (UnixRuntime) c.newInstance();
+ UnixRuntime r = (UnixRuntime) c.getDeclaredConstructor(new Class[]{Boolean.TYPE}).newInstance(new Object[]{Boolean.TRUE});
+ return exec(r,argv,envp);
} catch(Exception e) {
- return -ENOMEM;
+ 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;
r.closeOnExec = closeOnExec;
fds = null;
closeOnExec = null;
+ r.gs = gs;
+ r.sm = sm;
r.cwd = cwd;
- r.fs = fs;
r.pid = pid;
- r.ppid = ppid;
+ r.parent = parent;
r.start(argv,envp);
-
+
state = EXECED;
execedRuntime = r;
return 0;
}
- // FEATURE: Use custom PipeFD - be sure to support PIPE_BUF of data
- private int sys_pipe(int addr) {
- PipedOutputStream writerStream = new PipedOutputStream();
- PipedInputStream readerStream;
- try {
- readerStream = new PipedInputStream(writerStream);
- } catch(IOException e) {
- return -EIO;
+ static class Pipe {
+ private final byte[] pipebuf = new byte[PIPE_BUF*4];
+ private int readPos;
+ private int writePos;
+
+ public final FD reader = new Reader();
+ public final FD writer = new Writer();
+
+ public class Reader extends FD {
+ 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) {
+ while(writePos != -1 && readPos == writePos) {
+ try { Pipe.this.wait(); } catch(InterruptedException e) { /* ignore */ }
+ }
+ if(writePos == -1) return 0; // eof
+ len = Math.min(len,writePos-readPos);
+ System.arraycopy(pipebuf,readPos,buf,off,len);
+ readPos += len;
+ if(readPos == writePos) Pipe.this.notify();
+ return len;
+ }
+ }
+ public int flags() { return O_RDONLY; }
+ public void _close() { synchronized(Pipe.this) { readPos = -1; Pipe.this.notify(); } }
}
- FD reader = new InputStreamFD(readerStream);
- FD writer = new OutputStreamFD(writerStream);
- int fd1 = addFD(reader);
+
+ public class Writer extends FD {
+ 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) {
+ if(readPos == -1) throw new ErrnoException(EPIPE);
+ if(pipebuf.length - writePos < Math.min(len,PIPE_BUF)) {
+ // not enough space to atomicly write the data
+ while(readPos != -1 && readPos != writePos) {
+ try { Pipe.this.wait(); } catch(InterruptedException e) { /* ignore */ }
+ }
+ if(readPos == -1) throw new ErrnoException(EPIPE);
+ readPos = writePos = 0;
+ }
+ len = Math.min(len,pipebuf.length - writePos);
+ System.arraycopy(buf,off,pipebuf,writePos,len);
+ if(readPos == writePos) Pipe.this.notify();
+ writePos += len;
+ return len;
+ }
+ }
+ public int flags() { return O_WRONLY; }
+ public void _close() { synchronized(Pipe.this) { writePos = -1; Pipe.this.notify(); } }
+ }
+ }
+
+ private int sys_pipe(int addr) {
+ Pipe pipe = new Pipe();
+
+ int fd1 = addFD(pipe.reader);
if(fd1 < 0) return -ENFILE;
- int fd2 = addFD(writer);
+ int fd2 = addFD(pipe.writer);
if(fd2 < 0) { closeFD(fd1); return -ENFILE; }
+
try {
memWrite(addr,fd1);
memWrite(addr+4,fd2);
return 0;
}
- private int sys_stat(int cstring, int addr) {
+ private int sys_dup(int oldd) {
+ if(oldd < 0 || oldd >= OPEN_MAX) return -EBADFD;
+ if(fds[oldd] == null) return -EBADFD;
+ FD fd = fds[oldd].dup();
+ int newd = addFD(fd);
+ if(newd < 0) { fd.close(); return -ENFILE; }
+ return newd;
+ }
+
+ private int sys_stat(int cstring, int addr) throws FaultException, ErrnoException {
+ FStat s = gs.stat(this,normalizePath(cstring(cstring)));
+ if(s == null) return -ENOENT;
+ return stat(s,addr);
+ }
+
+ private int sys_lstat(int cstring, int addr) throws FaultException, ErrnoException {
+ FStat s = gs.lstat(this,normalizePath(cstring(cstring)));
+ if(s == null) return -ENOENT;
+ return stat(s,addr);
+ }
+
+ private int sys_mkdir(int cstring, int mode) throws FaultException, ErrnoException {
+ gs.mkdir(this,normalizePath(cstring(cstring)),mode);
+ 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;
+ if(size < b.length+2) return -ERANGE;
+ memset(addr,'/',1);
+ copyout(b,addr+1,b.length);
+ memset(addr+b.length+1,0,1);
+ return addr;
+ }
+
+ private int sys_chdir(int addr) throws ErrnoException, FaultException {
+ String path = normalizePath(cstring(addr));
+ FStat st = gs.stat(this,path);
+ if(st == null) return -ENOENT;
+ if(st.type() != FStat.S_IFDIR) return -ENOTDIR;
+ cwd = path;
+ return 0;
+ }
+
+ private int sys_getdents(int fdn, int addr, int count, int seekptr) throws FaultException, ErrnoException {
+ count = Math.min(count,MAX_CHUNK);
+ if(fdn < 0 || fdn >= OPEN_MAX) return -EBADFD;
+ if(fds[fdn] == null) return -EBADFD;
+ byte[] buf = byteBuf(count);
+ int n = fds[fdn].getdents(buf,0,count);
+ copyout(buf,addr,n);
+ return n;
+ }
+
+ void _preCloseFD(FD fd) {
+ // release all fcntl locks on this file
+ Seekable s = fd.seekable();
+ if (s == null) return;
+
try {
- String path = normalizePath(cstring(cstring));
- return stat(fs.stat(path),addr);
+ for (int i=0; i < gs.locks.length; i++) {
+ Seekable.Lock l = gs.locks[i];
+ if (l == null) continue;
+ if (s.equals(l.seekable()) && l.getOwner() == this) {
+ l.release();
+ gs.locks[i] = null;
+ }
+ }
+ } catch (IOException e) { throw new RuntimeException(e); }
+ }
+
+ void _postCloseFD(FD fd) {
+ if (fd.isMarkedForDeleteOnClose()) {
+ try { gs.unlink(this, fd.getNormalizedPath()); }
+ catch (Throwable t) {}
+ }
+ }
+
+ /** Implements the F_GETLK and F_SETLK cases of fcntl syscall.
+ * If l_start = 0 and l_len = 0 the lock refers to the entire file.
+ * Uses GlobalState to ensure locking across processes in the same JVM.
+ struct flock {
+ short l_type; // lock type: F_UNLCK, F_RDLCK, F_WRLCK
+ short l_whence; // type of l_start: SEEK_SET, SEEK_CUR, SEEK_END
+ long l_start; // starting offset, bytes
+ long l_len; // len = 0 means until EOF
+ short l_pid; // lock owner
+ short l_xxx; // padding
+ };
+ */
+ private int sys_fcntl_lock(int fdn, int cmd, int arg) throws FaultException{
+ if (cmd != F_GETLK && cmd != F_SETLK) return sys_fcntl(fdn, cmd, arg);
+
+ if(fdn < 0 || fdn >= OPEN_MAX) return -EBADFD;
+ if(fds[fdn] == null) return -EBADFD;
+ FD fd = fds[fdn];
+
+ if (arg == 0) return -EINVAL;
+ int word = memRead(arg);
+ int l_start = memRead(arg+4);
+ int l_len = memRead(arg+8);
+ int l_type = word>>16;
+ int l_whence = word&0x00ff;
+
+ Seekable.Lock[] locks = gs.locks;
+ Seekable s = fd.seekable();
+ if (s == null) return -EINVAL;
+
+ try {
+
+ switch (l_whence) {
+ case SEEK_SET: break;
+ case SEEK_CUR: l_start += s.pos(); break;
+ case SEEK_END: l_start += s.length(); break;
+ default: return -1;
+ }
+
+ if (cmd == F_GETLK) {
+ // The simple Java file locking below will happily return
+ // a lock that overlaps one already held by the JVM. Thus
+ // we must check over all the locks held by other Runtimes
+ for (int i=0; i < locks.length; i++) {
+ if (locks[i] == null || !s.equals(locks[i].seekable()))
+ continue;
+ if (!locks[i].overlaps(l_start, l_len))
+ continue;
+ if (locks[i].getOwner() == this)
+ continue;
+ if (locks[i].isShared() && l_type == F_RDLCK)
+ continue;
+
+ // overlapping lock held by another process
+ return 0;
+ }
+
+ // check if an area is lockable by attempting to obtain a lock
+ Seekable.Lock lock = s.lock(l_start, l_len, l_type == F_RDLCK);
+
+ if (lock != null) { // no lock exists
+ memWrite(arg, SEEK_SET|(F_UNLCK<<16));
+ lock.release();
+ }
+
+ return 0;
}
- catch(ErrnoException e) { return -e.errno; }
- catch(FileNotFoundException e) {
- if(e.getMessage() != null && e.getMessage().indexOf("Permission denied") >= 0) return -EACCES;
- return -ENOENT;
+
+ // now processing F_SETLK
+ if (cmd != F_SETLK) return -EINVAL;
+
+ if (l_type == F_UNLCK) {
+ // release all locks that fall within the boundaries given
+ for (int i=0; i < locks.length; i++) {
+ if (locks[i] == null || !s.equals(locks[i].seekable()))
+ continue;
+ if (locks[i].getOwner() != this) continue;
+
+ int pos = (int)locks[i].position();
+ if (pos < l_start) continue;
+ if (l_start != 0 && l_len != 0) // start/len 0 means unlock all
+ if (pos + locks[i].size() > l_start + l_len)
+ continue;
+
+ locks[i].release();
+ locks[i] = null;
+ }
+ return 0;
+
+ } else if (l_type == F_RDLCK || l_type == F_WRLCK) {
+ // first see if a lock already exists
+ for (int i=0; i < locks.length; i++) {
+ if (locks[i] == null || !s.equals(locks[i].seekable()))
+ continue;
+
+ if (locks[i].getOwner() == this) {
+ // if this Runtime owns an overlapping lock work with it
+ if (locks[i].contained(l_start, l_len)) {
+ locks[i].release();
+ locks[i] = null;
+ } else if (locks[i].contains(l_start, l_len)) {
+ if (locks[i].isShared() == (l_type == F_RDLCK)) {
+ // return this more general lock
+ memWrite(arg+4, (int)locks[i].position());
+ memWrite(arg+8, (int)locks[i].size());
+ return 0;
+ } else {
+ locks[i].release();
+ locks[i] = null;
+ }
+ }
+ } else {
+ // if another Runtime has an lock and it is exclusive or
+ // we want an exclusive lock then fail
+ if (locks[i].overlaps(l_start, l_len)
+ && (!locks[i].isShared() || l_type == F_WRLCK))
+ return -EAGAIN;
+ }
+ }
+
+ // create the lock
+ Seekable.Lock lock = s.lock(l_start, l_len, l_type == F_RDLCK);
+ if (lock == null) return -EAGAIN;
+ lock.setOwner(this);
+
+ int i;
+ for (i=0; i < locks.length; i++)
+ if (locks[i] == null) break;
+ if (i == locks.length) return -ENOLCK;
+ locks[i] = lock;
+ return 0;
+
+ } else {
+ return -EINVAL;
}
- catch(IOException e) { return -EIO; }
- catch(FaultException e) { return -EFAULT; }
+
+ } catch (IOException e) { throw new RuntimeException(e); }
+ }
+
+ 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_mkdir(int cstring, int mode) {
+ 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 {
- fs.mkdir(normalizePath(cstring(cstring)));
- return 0;
+ inetAddr = Platform.inetAddressFromBytes(ip);
+ } catch(UnknownHostException e) {
+ return -EADDRNOTAVAIL;
}
- catch(ErrnoException e) { return -e.errno; }
- catch(FileNotFoundException e) { return -ENOENT; }
- catch(IOException e) { return -EIO; }
- catch(FaultException e) { return -EFAULT; }
+
+ 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_getcwd(int addr, int size) {
- byte[] b = getBytes(cwd);
- if(size == 0) return -EINVAL;
- if(size < b.length+2) return -ERANGE;
+ private int sys_resolve_hostname(int chostname, int addr, int sizeAddr) throws FaultException {
+ String hostname = cstring(chostname);
+ int size = memRead(sizeAddr);
+ InetAddress[] inetAddrs;
try {
- memset(addr,'/',1);
- copyout(b,addr+1,b.length);
- memset(addr+b.length+1,0,1);
- return addr;
- } catch(FaultException e) {
- return -EFAULT;
+ 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_chdir(int addr) {
+ 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 {
- String path = normalizePath(cstring(addr));
- System.err.println("Chdir: " + cstring(addr) + " -> " + path + " pwd: " + cwd);
- if(fs.stat(path).type() != FStat.S_IFDIR) return -ENOTDIR;
- cwd = path;
- System.err.println("Now: [" + cwd + "]");
+ fd.ss = new ServerSocket(fd.bindPort,backlog,fd.bindAddr);
+ fd.flags |= SocketFD.LISTEN;
return 0;
+ } catch(IOException e) {
+ return -EADDRINUSE;
}
- catch(ErrnoException e) { return -e.errno; }
- catch(FileNotFoundException e) { return -ENOENT; }
- catch(IOException e) { return -EIO; }
- catch(FaultException e) { return -EFAULT; }
+
}
+
+ 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;
- public void chdir(String dir) throws FileNotFoundException {
- if(state != STOPPED) throw new IllegalStateException("Can't chdir while process is running");
+ int size = memRead(lenaddr);
+
+ ServerSocket s = fd.ss;
+ Socket client;
try {
- dir = normalizePath(dir);
- if(fs.stat(dir).type() != FStat.S_IFDIR) throw new FileNotFoundException();
+ client = s.accept();
} catch(IOException e) {
- throw new FileNotFoundException();
+ 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");
}
- cwd = dir;
+ return 0;
}
+
+ public static final class GlobalState {
+ Hashtable execCache = new Hashtable();
+
+ final UnixRuntime[] tasks;
+ int nextPID = 1;
+
+ /** Table of all current file locks held by this process. */
+ Seekable.Lock[] locks = new Seekable.Lock[16];
+
+ private MP[] mps = new MP[0];
+ private FS root;
+
+ public GlobalState() { this(255); }
+ public GlobalState(int maxProcs) { this(maxProcs,true); }
+ public GlobalState(int maxProcs, boolean defaultMounts) {
+ tasks = new UnixRuntime[maxProcs+1];
+ if(defaultMounts) {
+ File root = null;
+ if(Platform.getProperty("nestedvm.root") != null) {
+ root = new File(Platform.getProperty("nestedvm.root"));
+ if(!root.isDirectory()) throw new IllegalArgumentException("nestedvm.root is not a directory");
+ } else {
+ String cwd = Platform.getProperty("user.dir");
+ root = Platform.getRoot(new File(cwd != null ? cwd : "."));
+ }
+
+ addMount("/",new HostFS(root));
+
+ if(Platform.getProperty("nestedvm.root") == null) {
+ File[] roots = Platform.listRoots();
+ for(int i=0;i<roots.length;i++) {
+ String name = roots[i].getPath();
+ if(name.endsWith(File.separator))
+ name = name.substring(0,name.length()-1);
+ if(name.length() == 0 || name.indexOf('/') != -1) continue;
+ addMount("/" + name.toLowerCase(),new HostFS(roots[i]));
+ }
+ }
+
+ addMount("/dev",new DevFS());
+ addMount("/resource",new ResourceFS());
+ addMount("/cygdrive",new CygdriveFS());
+ }
+ }
+
+ public String mapHostPath(String s) { return mapHostPath(new File(s)); }
+ public String mapHostPath(File f) {
+ MP[] list;
+ FS root;
+ synchronized(this) { mps = this.mps; root = this.root; }
+ if(!f.isAbsolute()) f = new File(f.getAbsolutePath());
+ for(int i=mps.length;i>=0;i--) {
+ FS fs = i == mps.length ? root : mps[i].fs;
+ String path = i == mps.length ? "" : mps[i].path;
+ if(!(fs instanceof HostFS)) continue;
+ File fsroot = ((HostFS)fs).getRoot();
+ if(!fsroot.isAbsolute()) fsroot = new File(fsroot.getAbsolutePath());
+ if(f.getPath().startsWith(fsroot.getPath())) {
+ char sep = File.separatorChar;
+ String child = f.getPath().substring(fsroot.getPath().length());
+ if(sep != '/') {
+ char[] child_ = child.toCharArray();
+ for(int j=0;j<child_.length;j++) {
+ if(child_[j] == '/') child_[j] = sep;
+ else if(child_[j] == sep) child_[j] = '/';
+ }
+ child = new String(child_);
+ }
+ String mapped = "/" + (path.length()==0?"":path+"/") + child;
+ return mapped;
+ }
+ }
+ return null;
+ }
+
+ static class MP implements Sort.Comparable {
+ public MP(String path, FS fs) { this.path = path; this.fs = fs; }
+ public String path;
+ public FS fs;
+ public int compareTo(Object o) {
+ if(!(o instanceof MP)) return 1;
+ return -path.compareTo(((MP)o).path);
+ }
+ }
+
+ public synchronized FS getMount(String path) {
+ if(!path.startsWith("/")) throw new IllegalArgumentException("Mount point doesn't start with a /");
+ if(path.equals("/")) return root;
+ path = path.substring(1);
+ for(int i=0;i<mps.length;i++)
+ if(mps[i].path.equals(path)) return mps[i].fs;
+ return null;
+ }
+
+ public synchronized void addMount(String path, FS fs) {
+ if(getMount(path) != null) throw new IllegalArgumentException("mount point already exists");
+ if(!path.startsWith("/")) throw new IllegalArgumentException("Mount point doesn't start with a /");
+
+ if(fs.owner != null) fs.owner.removeMount(fs);
+ fs.owner = this;
+
+ if(path.equals("/")) { root = fs; fs.devno = 1; return; }
+ path = path.substring(1);
+ int oldLength = mps.length;
+ MP[] newMPS = new MP[oldLength + 1];
+ if(oldLength != 0) System.arraycopy(mps,0,newMPS,0,oldLength);
+ newMPS[oldLength] = new MP(path,fs);
+ Sort.sort(newMPS);
+ mps = newMPS;
+ int highdevno = 0;
+ for(int i=0;i<mps.length;i++) highdevno = max(highdevno,mps[i].fs.devno);
+ fs.devno = highdevno + 2;
+ }
+ public synchronized void removeMount(FS fs) {
+ for(int i=0;i<mps.length;i++) if(mps[i].fs == fs) { removeMount(i); return; }
+ throw new IllegalArgumentException("mount point doesn't exist");
+ }
+
+ public synchronized void removeMount(String path) {
+ if(!path.startsWith("/")) throw new IllegalArgumentException("Mount point doesn't start with a /");
+ if(path.equals("/")) {
+ removeMount(-1);
+ } else {
+ path = path.substring(1);
+ int p;
+ for(p=0;p<mps.length;p++) if(mps[p].path.equals(path)) break;
+ if(p == mps.length) throw new IllegalArgumentException("mount point doesn't exist");
+ removeMount(p);
+ }
+ }
+
+ private void removeMount(int index) {
+ if(index == -1) { root.owner = null; root = null; return; }
+ MP[] newMPS = new MP[mps.length - 1];
+ System.arraycopy(mps,0,newMPS,0,index);
+ System.arraycopy(mps,0,newMPS,index,mps.length-index-1);
+ mps = newMPS;
+ }
+
+ private Object fsop(int op, UnixRuntime r, String normalizedPath, int arg1, int arg2) throws ErrnoException {
+ int pl = normalizedPath.length();
+ if(pl != 0) {
+ MP[] list;
+ synchronized(this) { list = mps; }
+ for(int i=0;i<list.length;i++) {
+ MP mp = list[i];
+ int mpl = mp.path.length();
+ 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 root.dispatch(op,r,normalizedPath,arg1,arg2);
+ }
+
+ 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 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 abstract static class FS {
- protected FD _open(String path, int flags, int mode) throws IOException { return null; }
- protected FStat _stat(String path) throws IOException { return null; }
- protected void _mkdir(String path) throws IOException { throw new ErrnoException(EROFS); }
-
- protected static final int OPEN = 1;
- protected static final int STAT = 2;
- protected static final int MKDIR = 3;
-
- protected Object op(int op, String path, int arg1, int arg2) throws IOException {
- switch(op) {
- case OPEN: return _open(path,arg1,arg2);
- case STAT: return _stat(path);
- case MKDIR: _mkdir(path); return null;
- default: throw new IllegalArgumentException("Unknown FS OP");
- }
- }
-
- public final FD open(String path, int flags, int mode) throws IOException { return (FD) op(OPEN,path,flags,mode); }
- public final FStat stat(String path) throws IOException { return (FStat) op(STAT,path,0,0); }
- public final void mkdir(String path) throws IOException { op(MKDIR,path,0,0); }
-
-
- // FEATURE: inode stuff
- // FEATURE: Implement whatever is needed to get newlib's opendir and friends to work - that patch is a pain
- protected static FD directoryFD(String[] files, int hashCode) throws IOException {
- ByteArrayOutputStream bos = new ByteArrayOutputStream();
- DataOutputStream dos = new DataOutputStream(bos);
- for(int i=0;i<files.length;i++) {
- byte[] b = getBytes(files[i]);
- int inode = (files[i].hashCode() ^ hashCode) & 0xfffff;
- dos.writeInt(inode);
- dos.writeInt(b.length);
- dos.write(b,0,b.length);
- }
- final byte[] data = bos.toByteArray();
- return new SeekableFD(new Seekable.ByteArray(data,false),RD_ONLY) {
- protected FStat _fstat() { return new FStat() {
- public int length() { return data.length; }
- public int type() { return S_IFDIR; }
- }; }
- };
+ 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
+ public abstract FD open(UnixRuntime r, String path, int flags, int mode) throws ErrnoException;
+ // 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;
}
+ // chroot support should go in here if it is ever implemented
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) {
do { inp++; } while(in[inp] == '/');
} else if(cwdl != 0) {
- cwd.getChars(0,cwdl,out,0);
- outp = cwdl;
+ 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] == '/') inp++;
+ 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 /..{$,/}
inp += 2;
if(outp > 0) outp--;
while(outp > 0 && out[outp] != '/') outp--;
- System.err.println("After ..: " + new String(out,0,outp));
+ //System.err.println("After ..: " + new String(out,0,outp));
continue;
}
+ // Just read a /.[^.] or /..[^/$]
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);
}
- public static class MountPointFS extends FS {
- private static class MP {
- public MP(String path, FS fs) { this.path = path; this.fs = fs; }
- public String path;
- public FS fs;
- public int compareTo(Object o) {
- if(!(o instanceof MP)) return 1;
- return -path.compareTo(((MP)o).path);
- }
- }
- private final MP[][] mps = new MP[128][];
- private final FS root;
- public MountPointFS(FS root) { this.root = root; }
-
- private static String fixup(String path) {
- if(!path.startsWith("/")) throw new IllegalArgumentException("Mount point doesn't start with a /");
- path = path.substring(1);
- if(path.length() == 0) throw new IllegalArgumentException("Zero length mount point path");
- return path;
- }
- public synchronized FS get(String path) {
- path = fixup(path);
- int f = path.charAt(0) & 0x7f;
- for(int i=0;mps[f] != null && i < mps[f].length;i++)
- if(mps[f][i].path.equals(path)) return mps[f][i].fs;
- return null;
- }
-
- public synchronized void add(String path, FS fs) {
- if(get(path) != null) throw new IllegalArgumentException("mount point already exists");
- path = fixup(path);
- int f = path.charAt(0) & 0x7f;
- int oldLength = mps[f] == null ? 0 : mps[f].length;
- MP[] newList = new MP[oldLength + 1];
- if(oldLength != 0) System.arraycopy(mps[f],0,newList,0,oldLength);
- newList[oldLength] = new MP(path,fs);
- Arrays.sort(newList);
- mps[f] = newList;
- }
-
- public synchronized void remove(String path) {
- path = fixup(path);
- if(get(path) == null) throw new IllegalArgumentException("mount point doesn't exist");
- int f = path.charAt(0) & 0x7f;
- MP[] oldList = mps[f];
- MP[] newList = new MP[oldList.length - 1];
- int p = 0;
- for(p=0;p<oldList.length;p++) if(oldList[p].path.equals(path)) break;
- if(p == oldList.length) throw new Error("should never happen");
- System.arraycopy(oldList,0,newList,0,p);
- System.arraycopy(oldList,0,newList,p,oldList.length-p-1);
- mps[f] = newList;
- }
-
- protected Object op(int op, String path, int arg1, int arg2) throws IOException {
- int pl = path.length();
- if(pl != 0) {
- MP[] list = mps[path.charAt(0) & 0x7f];
- if(list != null) for(int i=0;i<list.length;i++) {
- MP mp = list[i];
- int mpl = mp.path.length();
- if(pl == mpl || (pl < mpl && path.charAt(mpl) == '/'))
- return mp.fs.op(op,pl == mpl ? "" : path.substring(mpl+1),arg1,arg2);
- }
+ FStat hostFStat(final File f, Object data) {
+ boolean e = false;
+ try {
+ FileInputStream fis = new FileInputStream(f);
+ switch(fis.read()) {
+ case '\177': e = fis.read() == 'E' && fis.read() == 'L' && fis.read() == 'F'; break;
+ case '#': e = fis.read() == '!';
}
- return root.op(op,path,arg1,arg2);
- }
+ fis.close();
+ } catch(IOException e2) { }
+ HostFS fs = (HostFS) data;
+ final int inode = fs.inodes.get(f.getAbsolutePath());
+ final int devno = fs.devno;
+ return new HostFStat(f,e) {
+ public int inode() { return inode; }
+ public int dev() { return devno; }
+ };
}
-
+
+ FD hostFSDirFD(File f, Object _fs) {
+ HostFS fs = (HostFS) _fs;
+ return fs.new HostDirFD(f);
+ }
+
public static class HostFS extends FS {
+ InodeCache inodes = new InodeCache(4000);
protected File root;
public File getRoot() { return root; }
- private static File hostRootDir() {
- String cwd = getSystemProperty("user.dir");
- File f = new File(cwd != null ? cwd : ".");
- f = new File(f.getAbsolutePath());
- while(f.getParent() != null) f = new File(f.getParent());
- return f;
- }
-
- File hostFile(String path) {
+ protected File hostFile(String path) {
char sep = File.separatorChar;
if(sep != '/') {
char buf[] = path.toCharArray();
for(int i=0;i<buf.length;i++) {
- char c = buf[i];
+ char c = buf[i];
if(c == '/') buf[i] = sep;
else if(c == sep) buf[i] = '/';
}
return new File(root,path);
}
- public HostFS() { this(hostRootDir()); }
public HostFS(String root) { this(new File(root)); }
public HostFS(File root) { this.root = root; }
-
- // FEATURE: This shares a lot with Runtime.open
- // NOTE: createNewFile is a Java2 function
- public FD _open(String path, int flags, int mode) throws IOException {
+ public FD open(UnixRuntime r, String path, int flags, int mode) throws ErrnoException {
final File f = hostFile(path);
- if(f.isDirectory()) {
- if((flags&3)!=RD_ONLY) throw new ErrnoException(EACCES);
- return directoryFD(f.list(),path.hashCode());
- }
- if((flags & (O_EXCL|O_CREAT)) == (O_EXCL|O_CREAT))
- if(!f.createNewFile()) throw new ErrnoException(EEXIST);
- if((flags&O_CREAT) == 0 && !f.exists())
- return null;
- final Seekable.File sf = new Seekable.File(f,(flags&3)!=RD_ONLY);
- if((flags&O_TRUNC)!=0) sf.setLength(0);
- return new SeekableFD(sf,mode) {
- protected FStat _fstat() { return new HostFStat(f) {
- public int size() {
- try { return sf.length(); } catch(IOException e) { return 0; }
+ 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()) {
+ // Can't delete file immediately, so mark for
+ // delete on close all matching FDs
+ boolean marked = false;
+ for(int i=0;i<OPEN_MAX;i++) {
+ if(r.fds[i] != null) {
+ String fdpath = r.fds[i].getNormalizedPath();
+ if(fdpath != null && fdpath.equals(path)) {
+ r.fds[i].markDeleteOnClose();
+ marked = true;
+ }
}
- };}
- };
+ }
+ if(!marked) throw new ErrnoException(EPERM);
+ }
}
- public FStat _stat(String path) throws FileNotFoundException {
+ public FStat stat(UnixRuntime r, String path) throws ErrnoException {
File f = hostFile(path);
- if(!f.exists()) throw new FileNotFoundException();
- return new HostFStat(f);
+ if(r.sm != null && !r.sm.allowStat(f)) throw new ErrnoException(EACCES);
+ if(!f.exists()) return null;
+ return r.hostFStat(f,this);
}
- public void _mkdir(String path) throws IOException {
+ public void mkdir(UnixRuntime r, String path, int mode) throws ErrnoException {
File f = hostFile(path);
+ 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;
+ 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 = 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; }
+ }
+ }
+
+ /* Implements the Cygwin notation for accessing MS Windows drive letters
+ * in a unix path. The path /cygdrive/c/myfile is converted to C:\file.
+ * As there is no POSIX standard for this, little checking is done. */
+ public static class CygdriveFS extends HostFS {
+ protected File hostFile(String path) {
+ final char drive = path.charAt(0);
+
+ if (drive < 'a' || drive > 'z' || path.charAt(1) != '/')
+ return null;
+
+ path = drive + ":" + path.substring(1).replace('/', '\\');
+ return new File(path);
+ }
+
+ public CygdriveFS() { super("/"); }
+ }
+
+ private static void putInt(byte[] buf, int off, int n) {
+ buf[off+0] = (byte)((n>>>24)&0xff);
+ buf[off+1] = (byte)((n>>>16)&0xff);
+ buf[off+2] = (byte)((n>>> 8)&0xff);
+ buf[off+3] = (byte)((n>>> 0)&0xff);
+ }
+
+ public static abstract class DirFD extends FD {
+ private int pos = -2;
+
+ protected abstract int size();
+ protected abstract String name(int n);
+ protected abstract int inode(int n);
+ protected abstract int myDev();
+ 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;
+ int reclen;
+ OUTER: for(;len > 0 && pos < size();pos++){
+ switch(pos) {
+ case -2:
+ case -1:
+ ino = pos == -1 ? parentInode() : myInode();
+ if(ino == -1) continue;
+ reclen = 9 + (pos == -1 ? 2 : 1);
+ if(reclen > len) break OUTER;
+ buf[off+8] = '.';
+ if(pos == -1) buf[off+9] = '.';
+ break;
+ default: {
+ String f = name(pos);
+ byte[] fb = getBytes(f);
+ reclen = fb.length + 9;
+ if(reclen > len) break OUTER;
+ ino = inode(pos);
+ System.arraycopy(fb,0,buf,off+8,fb.length);
+ }
+ }
+ buf[off+reclen-1] = 0; // null terminate
+ reclen = (reclen + 3) & ~3; // add padding
+ putInt(buf,off,reclen);
+ putInt(buf,off+4,ino);
+ off += reclen;
+ len -= reclen;
+ }
+ return off-ooff;
+ }
+
+ protected FStat _fstat() {
+ return new FStat() {
+ public int type() { return S_IFDIR; }
+ public int inode() { return myInode(); }
+ public int dev() { return myDev(); }
+ };
+ }
}
- private static class DevFStat extends FStat {
- public int dev() { return 1; }
- public int mode() { return 0666; }
- public int type() { return S_IFCHR; }
- public int nlink() { return 1; }
- }
- private static 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 write(byte[] a, int off, int length) { return length; }
- public int seek(int n, int whence) { return 0; }
- public FStat _fstat() { return new DevFStat(); }
- };
- private static 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(); }
- };
-
- // FIXME: Support /dev/fd (need to have syscalls pass along Runtime instance)
public static class DevFS extends FS {
- public FD _open(String path, int mode, int flags) throws IOException {
+ private static final int ROOT_INODE = 1;
+ private static final int NULL_INODE = 2;
+ private static final int ZERO_INODE = 3;
+ private static final int FD_INODE = 4;
+ private static final int FD_INODES = 32;
+
+ 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 {
+ public int myDev() { return devno; }
+ }
+
+ private FD devZeroFD = new FD() {
+ 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 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("null")) return devNullFD;
if(path.equals("zero")) return devZeroFD;
- /*if(path.startsWith("fd/")) {
+ if(path.startsWith("fd/")) {
int n;
try {
n = Integer.parseInt(path.substring(4));
} catch(NumberFormatException e) {
- throw new FileNotFoundException();
+ return null;
}
- if(n < 0 || n >= OPEN_MAX) throw new FileNotFoundException();
- if(fds[n] == null) throw new FileNotFoundException();
- return fds[n].dup();
+ if(n < 0 || n >= OPEN_MAX) return null;
+ if(r.fds[n] == null) return null;
+ return r.fds[n].dup();
}
if(path.equals("fd")) {
int count=0;
- for(int i=0;i<OPEN_MAX;i++) if(fds[i] != null) count++;
- String[] files = new String[count];
+ for(int i=0;i<OPEN_MAX;i++) if(r.fds[i] != null) { count++; }
+ final int[] files = new int[count];
count = 0;
- for(int i=0;i<OPEN_MAX;i++) if(fds[i] != null) files[count++] = Integer.toString(i);
- return directoryFD(files,hashCode());
- }*/
+ for(int i=0;i<OPEN_MAX;i++) if(r.fds[i] != null) files[count++] = i;
+ return new DevDirFD() {
+ public int myInode() { return FD_INODE; }
+ public int parentInode() { return ROOT_INODE; }
+ public int inode(int n) { return FD_INODES + n; }
+ public String name(int n) { return Integer.toString(files[n]); }
+ public int size() { return files.length; }
+ };
+ }
if(path.equals("")) {
- String[] files = { "null", "zero", "fd" };
- return directoryFD(files,hashCode());
+ return new DevDirFD() {
+ public int myInode() { return ROOT_INODE; }
+ // 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;
+ case 1: return ZERO_INODE;
+ case 2: return FD_INODE;
+ default: return -1;
+ }
+ }
+
+ public String name(int n) {
+ switch(n) {
+ case 0: return "null";
+ case 1: return "zero";
+ case 2: return "fd";
+ default: return null;
+ }
+ }
+ public int size() { return 3; }
+ };
}
- throw new FileNotFoundException();
+ return null;
}
- public FStat _stat(String path) throws IOException {
+ public FStat stat(UnixRuntime r,String path) throws ErrnoException {
if(path.equals("null")) return devNullFD.fstat();
if(path.equals("zero")) return devZeroFD.fstat();
- /*if(path.startsWith("fd/")) {
+ if(path.startsWith("fd/")) {
int n;
try {
- n = Integer.parseInt(path.substring(4));
+ n = Integer.parseInt(path.substring(3));
} catch(NumberFormatException e) {
- throw new FileNotFoundException();
+ return null;
}
- if(n < 0 || n >= OPEN_MAX) throw new FileNotFoundException();
- if(fds[n] == null) throw new FileNotFoundException();
- return fds[n].fstat();
+ if(n < 0 || n >= OPEN_MAX) return null;
+ if(r.fds[n] == null) return null;
+ return r.fds[n].fstat();
}
- 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; }};
- throw new FileNotFoundException();
+ 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(String path) throws IOException { 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