Data corruption under Windows/cygwin/perl/append

captnrexx

$ cat test.pl
#!/usr/bin/perl
for my $n (1 .. 10) {
my $output="$n a simple test string $n!\n";
if (open LOG,'>>doall.log') {
printf LOG $output;
close LOG;
}
}

This simple script should write 10 time "1 a simple string 1". It works fine under cygwin and dropbox directorys, but if the directory linked to a boxcrypted drive
cmd -> /cygdrive/q/cmd (Q: is the boxcryptdrive) the data corrupts because the "append (>>)" starts at filestart (like ">"). So, only the last written line is seen.

Tested with

XP and Windows 7
Cygwin (incl. perl installation)
Boxcrypter 1.1 and 1.2.0.2

captnrexx

Hmm, it seems thats depend on the position on whicht test.pl will bes startet, not on the position, doall.log will be saved.

~ = home (uncrypted, local)
~/cmd = crypted,linked to Q:\cmd

cd ~/cmd
test.pl wrote doall.log corrupts

cd ~/cmd
test.pl wrote ../doall.log (in ~) corrupts

cd ~
cmd/test.pl wrote doall.log ok

cd ~
cmd/test.pl wrote ../doall.log ok

captnrexx

Additonal Info:

All encrypted files are on a dropbox-folder which are synced between at least 3 PC's (2 in the same network, the third one is far away).

Used Dropbox versions are 1.2.48 and 1.3.14

Robert

We'll have a look at this issue!