[kaffe] Bug in FileInputStream
Patrick Tullmann
tullmann at cs.utah.edu
Tue Jun 18 22:15:52 PDT 2002
Jim wrote:
> Okay, I just tried the patch, but now it fails some regression tests...
It turns out I was invoking "File.getName()" where I should have
invoked "File.getPath()". Duh. I swear I ran FullTest.sh before
submitting this patch. I also included FileChecks.java, which tests
the File-based constructors with various sorts of bad File objects.
Before I get to the hopefully improved patch, a couple notes.
First, the java.util.TimeZone implementation goes into infinite
recursion if it cannot load the "GMT" time zone. A patch to abort if
this is encountered is included, but I wonder if such fatal errors at
startup should be redirected to a common place in kaffe.lang or
something? Feel free to leave this out, of course.
Second, occasionally when I run FullTest.sh, it doesn't seem to
recompile the class libraries totally. Anyone else seen this?
(Perhaps I'm just making up excuses, though... :)
Here's the improved patch. Here's a ChangeLog entry, too. I'm quite
sure I ran the FullTest.sh script this time.
Tue Jun 18 22:36:21 MDT 2002 Pat Tullmann <pat at tullmann.org>
* libraries/javalib/java/io/FileInputStream.java,
libraries/javalib/java/io/FileOutputStream.java: Change
constructors to detect and fail with FileNotFoundException if
given file/filename is a directory.
* test/regression/FileChecks.java: Test the FileInputStream
constructors.
* java/util/TimeZone.java: Add sanity check to prevent failure
to lookup GMT from causing infinite recursion.
-Pat
----- ----- ---- --- --- -- - - - - -
Pat Tullmann tullmann at cs.utah.edu
Does the name `Pavlov' ring a bell?
Sun Jun 16 22:40:33 PDT 2002 Jim Pick <jim at kaffe.org>
* developers/update-class-list: Fixed (was broken by
diff -u -r -N --exclude=CVS --exclude=.* --exclude=DEAD --exclude=Makefile.in --exclude=configure pure/libraries/javalib/java/io/FileInputStream.java fstreamfix/libraries/javalib/java/io/FileInputStream.java
--- pure/libraries/javalib/java/io/FileInputStream.java Thu Jan 3 22:12:22 2002
+++ fstreamfix/libraries/javalib/java/io/FileInputStream.java Tue Jun 18 17:12:36 2002
@@ -20,31 +20,38 @@
System.loadLibrary("io");
}
-public FileInputStream(File file) throws FileNotFoundException {
- this(file.getPath());
-}
-
public FileInputStream(FileDescriptor fdObj) {
SecurityManager sm = System.getSecurityManager();
if (sm != null)
sm.checkRead(fdObj);
+ // XXX check if fd is invalid? Or points to a non-file object?
fd=fdObj;
}
public FileInputStream(String name) throws FileNotFoundException {
- final SecurityManager sm = System.getSecurityManager();
- if (sm != null)
- sm.checkRead(name);
+ this(new File(name));
+}
+
+public FileInputStream(File file) throws FileNotFoundException {
+ final String fname = file.getPath();
+
+ // Note File.isDirectory() will do the required SecurityManager
+ // canRead() check for us.
+ if (file.isDirectory())
+ throw new FileNotFoundException(fname+ ": Is a directory");
+
try {
- open(name);
+ open(fname);
} catch (IOException e) {
/* Note that open may throw an IOException, but the spec says
* that this constructor throws only FileNotFoundExceptions,
* hence we must map them.
*/
- throw new FileNotFoundException(name + ": " + e.getMessage());
+ throw new FileNotFoundException(fname + ": " + e.getMessage());
}
}
+
+
native public int available() throws IOException;
diff -u -r -N --exclude=CVS --exclude=.* --exclude=DEAD --exclude=Makefile.in --exclude=configure pure/libraries/javalib/java/io/FileOutputStream.java fstreamfix/libraries/javalib/java/io/FileOutputStream.java
--- pure/libraries/javalib/java/io/FileOutputStream.java Thu Jan 3 22:12:22 2002
+++ fstreamfix/libraries/javalib/java/io/FileOutputStream.java Tue Jun 18 17:12:28 2002
@@ -20,13 +20,8 @@
private FileDescriptor fd = new FileDescriptor();
-public FileOutputStream(File file) throws IOException
-{
- this(file.getPath());
-}
-
public FileOutputStream(FileDescriptor fdObj)
- {
+{
final SecurityManager sm = System.getSecurityManager();
if (sm != null)
sm.checkWrite(fdObj);
@@ -38,16 +33,39 @@
this(name, false);
}
+public FileOutputStream(File file) throws FileNotFoundException
+{
+ this(file, false);
+}
+
public FileOutputStream(String name, boolean append) throws FileNotFoundException
{
+ this(new File(name), append);
+}
+
+public FileOutputStream(File file, boolean append) throws FileNotFoundException
+{
+ final String fname = file.getPath();
+
+ // Note, don't need an explicit File.isDirectory() check
+ // as the open() call in write mode will check that.
+
final SecurityManager sm = System.getSecurityManager();
if (sm != null)
- sm.checkWrite(name);
- if (!append) {
- open(name);
+ sm.checkWrite(fname);
+
+ try
+ {
+ if (!append) {
+ open(fname);
+ }
+ else {
+ openAppend(fname);
+ }
}
- else {
- openAppend(name);
+ catch (IOException ioe)
+ {
+ throw new FileNotFoundException(fname+ ": " +ioe.getMessage());
}
}
@@ -69,9 +87,9 @@
return (fd);
}
-native private void open(String name);
+native private void open(String name) throws IOException;
-native private void openAppend(String name);
+native private void openAppend(String name) throws IOException;
public void write(byte b[]) throws IOException
{
diff -u -r -N --exclude=CVS --exclude=.* --exclude=DEAD --exclude=Makefile.in --exclude=configure pure/libraries/javalib/java/util/TimeZone.java fstreamfix/libraries/javalib/java/util/TimeZone.java
--- pure/libraries/javalib/java/util/TimeZone.java Thu Mar 28 04:24:13 2002
+++ fstreamfix/libraries/javalib/java/util/TimeZone.java Tue Jun 18 17:01:37 2002
@@ -154,6 +154,13 @@
/* If file cannot parsed properly, simply fall back to GMT
* timezone. This is what the getTimeZone() API doc demands.
*/
+ if (ID.equals("GMT"))
+ {
+ System.err.println("Fatal error loading (required) GMT TimeZone. Aborting.");
+ System.err.println("Exception: " +e);
+ e.printStackTrace(System.err);
+ System.exit(1);
+ }
tz = getTimeZone("GMT");
zones.put(ID, tz);
}
diff -u -r -N --exclude=CVS --exclude=.* --exclude=DEAD --exclude=Makefile.in --exclude=configure pure/test/regression/FileChecks.java fstreamfix/test/regression/FileChecks.java
--- pure/test/regression/FileChecks.java Wed Dec 31 17:00:00 1969
+++ fstreamfix/test/regression/FileChecks.java Tue Jun 18 20:41:12 2002
@@ -0,0 +1,76 @@
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.FileNotFoundException;
+
+public class FileChecks
+{
+ public static void main(String[] argv)
+ {
+ try
+ {
+ FileInputStream fis = new FileInputStream(".");
+ System.out.println("1 FAIL! Should throw java.io.FileNotFoundException!");
+ System.exit(1);
+ }
+ catch (FileNotFoundException e)
+ {
+ System.out.println("1 Success got: " +e);
+ }
+
+ try
+ {
+ File file = new File(".");
+ FileInputStream fis = new FileInputStream(file);
+ System.out.println("2 FAIL! Should throw java.io.FileNotFoundException!");
+ System.exit(1);
+ }
+ catch (FileNotFoundException e)
+ {
+ System.out.println("2 Success got: " +e);
+ }
+
+ try
+ {
+ FileOutputStream fis = new FileOutputStream(".");
+ System.out.println("3 FAIL! Should throw java.io.FileNotFoundException!");
+ System.exit(1);
+ }
+ catch (FileNotFoundException e)
+ {
+ System.out.println("3 Success got: " +e);
+ }
+
+ try
+ {
+ File file = new File(".");
+ FileOutputStream fis = new FileOutputStream(file);
+ System.out.println("4 FAIL! Should throw java.io.FileNotFoundException!");
+ System.exit(1);
+ }
+ catch (FileNotFoundException e)
+ {
+ System.out.println("4 Success got: " +e);
+ }
+
+ try
+ {
+ File file = new File("FileChecks.class"); // should exist
+ FileInputStream fis = new FileInputStream(file);
+ System.out.println("5 Success.");
+ }
+ catch (FileNotFoundException e)
+ {
+ System.out.println("5 FAIL! Should not get: " +e);
+ }
+
+ }
+}
+
+/* Expected Output:
+1 Success got: java.io.FileNotFoundException: .: Is a directory
+2 Success got: java.io.FileNotFoundException: .: Is a directory
+3 Success got: java.io.FileNotFoundException: .: Is a directory
+4 Success got: java.io.FileNotFoundException: .: Is a directory
+5 Success.
+*/
diff -u -r -N --exclude=CVS --exclude=.* --exclude=DEAD --exclude=Makefile.in --exclude=configure pure/test/regression/Makefile.am fstreamfix/test/regression/Makefile.am
--- pure/test/regression/Makefile.am Wed May 29 16:58:44 2002
+++ fstreamfix/test/regression/Makefile.am Tue Jun 18 20:38:04 2002
@@ -68,6 +68,7 @@
SoTimeout.java \
wc.java \
FileTest.java \
+ FileChecks.java \
finalexc.java \
finaltest.java \
finaltest2.java \
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