#396 SysFileTree Problem w/ paths > 260 bytes

v3.6
open
Mark Hessling
Regutil (4)
7
2012-11-26
2012-11-26
Jerry Senowitz
No

I am trying to work with SysFileTree on Windows 7 SP1(NTFS) 64bit and Regina 3.6 (tried 3.7 also) but I get a message box (from Windows) that pops up saying that Regina has encountered a problem and needs to close. It happens under the following condition:

SysFileTree using the 'L' or 'T' option and the path information length is greater than 260 bytes(this is _MAX_PATH).

If I use the 'O' option, everything runs fine. Unfortunately, I need to look at the data from the 'L' option. Also, I have 1561 folder names that exceed 259 bytes, the longest being 326 bytes plus filenames up to 167 bytes. So, I'm not going to escape this one easily. This is considered by MSDN.com an extended path. They advise allocating up to 32767 bytes so as to not cause buffer overruns.

While I was listing the root folder using SysFileTree, I noticed a minor problem if SysFileTree is attempting to maintain columns with the 'L' option and have attached the console log. Look at pagefile.sys. The preallocated length for 'size' isn't large enough to contain 10+GByte numbers. The numbers are correct though. This forced me to move some rexx code into a loop that only needs to be executed once to determine what column locations contain data that I want to look at. It's a difference of 1 time execution vs approx 85K executes - Performance!

Discussion

  • Jerry Senowitz
    Jerry Senowitz
    2012-11-26

    Root folder listing

     
    Attachments
  • Jerry Senowitz
    Jerry Senowitz
    2012-11-26

    • priority: 5 --> 7