copyout(buf,addr,n);
return n;
}
+
+ /** The ftruncate syscall */
+ private int sys_ftruncate(int fdn, long length) {
+ if (fdn < 0 || fdn >= OPEN_MAX) return -EBADFD;
+ if (fds[fdn] == null) return -EBADFD;
+
+ Seekable seekable = fds[fdn].seekable();
+ if (length < 0 || seekable == null) return -EINVAL;
+ try { seekable.resize(length); } catch (IOException e) { return -EIO; }
+ return 0;
+ }
/** The close syscall */
private int sys_close(int fdn) {
case SYS_close: return sys_close(a);
case SYS_read: return sys_read(a,b,c);
case SYS_lseek: return sys_lseek(a,b,c);
+ case SYS_ftruncate: return sys_ftruncate(a,b);
case SYS_getpid: return sys_getpid();
case SYS_calljava: return sys_calljava(a,b,c,d);
case SYS_gettimeofday: return sys_gettimeofday(a,b);
public abstract void seek(int pos) throws IOException;
public abstract void close() throws IOException;
public abstract int pos() throws IOException;
+
+ public void resize(long length) throws IOException {
+ throw new IOException("resize not implemented for " + getClass());
+ }
public int read() throws IOException {
byte[] buf = new byte[1];
public int pos() throws IOException { return (int) raf.getFilePointer(); }
public int length() throws IOException { return (int)raf.length(); }
public void close() throws IOException { raf.close(); }
+ public void resize(long length) throws IOException { raf.setLength(length); }
}
public static class InputStream extends Seekable {