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digitalmars.D.bugs - [Issue 8291] New: dirEntry cannot handle root directories + unhandled exception causes crash

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8291

           Summary: dirEntry cannot handle root directories + unhandled
                    exception causes crash
           Product: D
           Version: D2
          Platform: All
        OS/Version: Windows
            Status: NEW
          Severity: major
          Priority: P2
         Component: Phobos
        AssignedTo: nobody puremagic.com
        ReportedBy: mp81ss rambler.ru



1) Wrong root handling api/params.
To stat a root directory, the "GetFileAttributes" API must be used instead of
"FindFirstFile".
To stat all files in a root dir, "C:\*" must be passed to FindFirstFile.
In all other cases, a path with [back]slash removed can be passed to
"FindFirstFile".
I know this in crazy, if you don't believe me, read CAREFULLY the FindFirstFile
docs.
P.S.:
This should make you see that the dirEntries method may have some problems...

2) Crash
The result of FindFirstFile is "enforced" in _init private method and NOT
CAUGHT in the caller public method dirEntry, and this crashes the client app.
It would be better to throw a FileException in _init and catch+rethrow it in
dirEntry.

Found on 2.059

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Jun 24 2012
parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8291


Vladimir Panteleev <thecybershadow gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |thecybershadow gmail.com



21:31:50 PST ---


 1) Wrong root handling api/params.
 To stat a root directory, the "GetFileAttributes" API must be used instead of
 "FindFirstFile".
 To stat all files in a root dir, "C:\*" must be passed to FindFirstFile.
 In all other cases, a path with [back]slash removed can be passed to
 "FindFirstFile".
 I know this in crazy, if you don't believe me, read CAREFULLY the FindFirstFile
 docs.
 P.S.:
 This should make you see that the dirEntries method may have some problems...


The following program works as expected, and prints the files/directories in
the root of my C: drive:

import std.stdio;
import std.file;

void main()
{
    writeln(dirEntries(`C:\`, SpanMode.shallow));
}

Can you clarify the problem?


 2) Crash
 The result of FindFirstFile is "enforced" in _init private method and NOT
 CAUGHT in the caller public method dirEntry, and this crashes the client app.
 It would be better to throw a FileException in _init and catch+rethrow it in
 dirEntry.


So what is the exact problem? Isn't a FileException thrown in either case?

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Dec 21 2012