How to skip permission denied exceptions if iterate through directories?

[Rikki Cattermole]

On Friday, 24 January 2014 at 23:46:04 UTC, Clas Onnebrink wrote:
>
> Hi,
>
> Im a newbie in D and I have a small problem. Thats my method
>
>  //*********************************
>    private void searchAndRunAction() {
>       foreach (entry;dirEntries(paramPath,
>                                 paramSearchType,
>                                 (paramSwitchRecursiveOn ? 
> SpanMode.breadth : SpanMode.shallow)))
>       {
>          filesCount++;
>
>          if (isDuplicate(entry.name)) {
>             filesDupCount++;
>             if (paramSwitchDeleteOn)
>                remove(entry.name);
>          }
>
>          printProgress(entry.name);
>       }
>    }
>
> I want work through a directory on my linux server but there 
> are some
> directories I have no permissions to access so I get following:
>
> ~/Projects/cltools/smdups $ source/smdups -r 
> -p=/media/clas/Elements2 -e=*.*
> std.file.FileException at ../../../../src/libphobos/src/std/file.d(2353): 
> /media/clas/Elements2/lost+found: Permission denied
> ----------------
> /home/clas/Projects/cltools/smdups/source/smdups() [0x43cb1d]
> /home/clas/Projects/cltools/smdups/source/smdups() [0x43eab4]
> /home/clas/Projects/cltools/smdups/source/smdups() [0x404768]
> /home/clas/Projects/cltools/smdups/source/smdups() [0x404116]
> /home/clas/Projects/cltools/smdups/source/smdups() [0x404d2d]
> /home/clas/Projects/cltools/smdups/source/smdups() [0x41a71f]
> /home/clas/Projects/cltools/smdups/source/smdups() [0x41ae7f]
> /home/clas/Projects/cltools/smdups/source/smdups() [0x41b0b0]
> /home/clas/Projects/cltools/smdups/source/smdups() [0x41ae7f]
> /home/clas/Projects/cltools/smdups/source/smdups() [0x41b018]
> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) 
> [0x7f66a29c8de5]
> /home/clas/Projects/cltools/smdups/source/smdups() [0x403e63]
> ----------------
> ~/Projects/cltools/smdups $ 
> std.file.FileException at ../../../../src/libphobos/src/std/file.d(2353): 
> /media/clas/Elements2/lost+found: Permission denied
> std.file.FileException at ../../../../src/libphobos/src/std/file.d(2353):: 
> command not found
>
> My question: How to skip any exceptions in dirEntries. I tried 
> it with filter.
> But no chance. Is there a way to do it like in C# with 
> LINQ-Expressions?
>
> greets
>
> clas

One way would just be to catch the exceptions. Note you may want 
to activate debug mode to know what functions are actually 
failing.
A FileException is being fired when it cannot do a file operation 
as detailed in phobos documentation.