// Copyright 2000-2005 the Contributors, as shown in the revision logs.
-// Licensed under the Apache Public Source License 2.0 ("the License").
+// Licensed under the Apache License 2.0 ("the License").
// You may not use this file except in compliance with the License.
// Copyright 2003 Brian Alliet
/** Table containing all open file descriptors. (Entries are null if the fd is not in use */
FD[] fds; // package-private for UnixRuntime
boolean closeOnExec[];
-
- /** Table of all current file locks held by this process. */
- Seekable.Lock[] locks;
- public static final int LOCK_MAX = 8;
/** Pointer to a SecurityManager for this process */
SecurityManager sm;
r.startTime = 0;
r.fds = new FD[OPEN_MAX];
for(int i=0;i<OPEN_MAX;i++) if(fds[i] != null) r.fds[i] = fds[i].dup();
- r.locks = new Seekable.Lock[LOCK_MAX];
int totalPages = writePages.length;
r.readPages = new int[totalPages][];
r.writePages = new int[totalPages][];
if(!exec) {
fds = new FD[OPEN_MAX];
closeOnExec = new boolean[OPEN_MAX];
- locks = new Seekable.Lock[LOCK_MAX];
InputStream stdin = win32Hacks ? new Win32ConsoleIS(System.in) : System.in;
addFD(new TerminalFD(stdin));
return i;
}
+ /** Hooks for subclasses before and after the process closes an FD */
+ void _preCloseFD(FD fd) { }
+ void _postCloseFD(FD fd) { }
+
/** Closes file descriptor <i>fdn</i> and removes it from the file descriptor table */
public final boolean closeFD(int fdn) {
if(state == EXITED || state == EXECED) throw new IllegalStateException("closeFD called in inappropriate state");
if(fdn < 0 || fdn >= OPEN_MAX) return false;
if(fds[fdn] == null) return false;
-
- // release all fcntl locks on this file
- Seekable s = fds[fdn].seekable();
- if (s != null) {
- try {
- for (int i=0; i < LOCK_MAX; i++) {
- if (locks[i] != null && s.equals(locks[i].seekable())) {
- locks[i].release();
- locks[i] = null;
- }
- }
- } catch (IOException e) { throw new RuntimeException(e); }
- }
-
+ _preCloseFD(fds[fdn]);
fds[fdn].close();
+ _postCloseFD(fds[fdn]);
fds[fdn] = null;
return true;
}
return null;
} catch(IOException e) { throw new ErrnoException(EIO); }
- return new SeekableFD(sf,flags) { protected FStat _fstat() { return hostFStat(f,data); } };
+ return new SeekableFD(sf,flags) { protected FStat _fstat() { return hostFStat(f,sf,data); } };
}
- FStat hostFStat(File f, Object data) { return new HostFStat(f); }
+ FStat hostFStat(File f, Seekable.File sf, Object data) { return new HostFStat(f,sf); }
FD hostFSDirFD(File f, Object data) { return null; }
return 0;
}
- private int sys_fcntl(int fdn, int cmd, int arg) throws FaultException {
+ final int sys_fcntl(int fdn, int cmd, int arg) throws FaultException {
int i;
if(fdn < 0 || fdn >= OPEN_MAX) return -EBADFD;
return closeOnExec[fdn] ? 1 : 0;
case F_GETLK:
case F_SETLK:
- try {
- return sys_fcntl_lock(fd, cmd, arg);
- } catch (IOException e) { throw new RuntimeException(e);}
+ if(STDERR_DIAG) System.err.println("WARNING: file locking requires UnixRuntime");
+ return -ENOSYS;
default:
if(STDERR_DIAG) System.err.println("WARNING: Unknown fcntl command: " + cmd);
return -ENOSYS;
}
}
- /** 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.
- 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(FD fd, int cmd, int arg)
- throws FaultException, IOException {
- if (arg == 0) { System.out.println("BAD ARG"); 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;
+ final int fsync(int fdn) {
+ if(fdn < 0 || fdn >= OPEN_MAX) return -EBADFD;
+ if(fds[fdn] == null) return -EBADFD;
+ FD fd = fds[fdn];
Seekable s = fd.seekable();
if (s == null) return -EINVAL;
- 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 && cmd != F_SETLK) return -EINVAL;
-
- if (cmd == F_GETLK) {
- // Check if an l_type lock can be aquired. The only way to
- // do this within the Java API is to try and create 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;
- }
-
- // 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 < LOCK_MAX; i++) {
- if (locks[i] == null || !s.equals(locks[i].seekable()))
- 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 < LOCK_MAX; i++) {
- if (locks[i] == null || !s.equals(locks[i].seekable()))
- continue;
- int pos = (int)locks[i].position();
- int size = (int)locks[i].size();
- if (l_start < pos && pos + size < l_start + l_len) {
- // found a lock contained in the new requested lock
- locks[i].release();
- locks[i] = null;
-
- } else if (l_start >= pos && pos + size >= l_start + l_len) {
- // found a lock that contains the requested lock
- if (locks[i].isShared() == (l_type == F_RDLCK)) {
- memWrite(arg+4, pos);
- memWrite(arg+8, size);
- return 0;
- } else {
- locks[i].release();
- locks[i] = null;
- }
- }
- }
-
- // create the lock
- Seekable.Lock lock = s.lock(l_start, l_len, l_type == F_RDLCK);
- if (lock == null) return -EAGAIN;
-
- int i;
- for (i=0; i < LOCK_MAX; i++)
- if (locks[i] == null) break;
- if (i == LOCK_MAX) return -ENOLCK;
- locks[i] = lock;
+ try {
+ s.sync();
return 0;
-
- } else {
- return -EINVAL;
+ } catch (IOException e) {
+ return -EIO;
}
}
-
/** The syscall dispatcher.
The should be called by subclasses when the syscall instruction is invoked.
<i>syscall</i> should be the contents of V0 and <i>a</i>, <i>b</i>, <i>c</i>, and <i>d</i> should be
case SYS_getgid: return sys_getgid();
case SYS_getegid: return sys_getegid();
+ case SYS_fsync: return fsync(a);
case SYS_memcpy: memcpy(a,b,c); return a;
case SYS_memset: memset(a,b,c); return a;
/** File Descriptor class */
public static abstract class FD {
private int refCount = 1;
+ private String normalizedPath = null;
+ private boolean deleteOnClose = false;
+
+ public void setNormalizedPath(String path) { normalizedPath = path; }
+ public String getNormalizedPath() { return normalizedPath; }
+
+ public void markDeleteOnClose() { deleteOnClose = true; }
+ public boolean isMarkedForDeleteOnClose() { return deleteOnClose; }
/** Read some bytes. Should return the number of bytes read, 0 on EOF, or throw an IOException on error */
public int read(byte[] a, int off, int length) throws ErrnoException { throw new ErrnoException(EBADFD); }
static class HostFStat extends FStat {
private final File f;
+ private final Seekable.File sf;
private final boolean executable;
- public HostFStat(File f) { this(f,false); }
- public HostFStat(File f, boolean executable) {
+ public HostFStat(File f, Seekable.File sf) { this(f,sf,false); }
+ public HostFStat(File f, boolean executable) {this(f,null,executable);}
+ public HostFStat(File f, Seekable.File sf, boolean executable) {
this.f = f;
+ this.sf = sf;
this.executable = executable;
}
public int dev() { return 1; }
if(f.canWrite()) mode |= 0222;
return mode;
}
- public int size() { return (int) f.length(); }
+ public int size() {
+ try {
+ return sf != null ? (int)sf.length() : (int)f.length();
+ } catch (Exception x) {
+ return (int)f.length();
+ }
+ }
public int mtime() { return (int)(f.lastModified()/1000); }
}
projects / nestedvm.git / blobdiff