Bad File descriptor Error

amvarma has asked for the wisdom of the Perl Monks concerning the following question:

Hi Experts, I am facing a issue with FTP section in my perl script. I am trying to get a list of log files from a mobile device. It has FTP server running. Here is the script =========================================

use File::Path;
use File::Copy;
use File::Basename;
use Net::FTP;



open(FILE, "<", "api_log_file.txt");
 while(<FILE>) {
     chomp;
     push(@arr, $_);
  }
 close(FILE);



chdir("C:/OzoneAPI3Regresssion/Logs");

print "Connecting to HH Device 192.168.2.35 ................ ";
my $ftp=Net::FTP->new("192.168.2.35",Debug => 1,Passive => 0,Timeout=>
+1000);


  if ( !$ftp ) {
       die "Cannot connect to the ftp server: $@\n";
   } else {
        print "done\n";
   }
   print "Passing credentials ....................... ";
  $ftp->login("admin","admin") or die "Could not login\n",$ftp->messag
+e;
  print "done\n";
  foreach(@arr) {
    print "array element: $_\n";
     chomp($_);
     $ftp->binary;
     $ftp->get("$_") or die "Cannot get $_: $! $^E\n";    
  }
 
 print "Closing connection ........................ ";
 $ftp->quit;
 print "done\n";       

====================
[download]

When I run this I am getting the following error.


Net::FTP>>> Net::FTP(2.77)
Net::FTP>>>   Exporter(5.62)
Net::FTP>>>   Net::Cmd(2.29)
Net::FTP>>>   IO::Socket::INET(1.31)
Net::FTP>>>     IO::Socket(1.30_01)
Net::FTP>>>       IO::Handle(1.27)
Net::FTP=GLOB(0x1f04884)<<< 220 FreeFloat Ftp Server (Version 1.00).
Connecting to Ozone Device 192.168.2.35 ................ done
Net::FTP=GLOB(0x1f04884)>>> USER admin
Net::FTP=GLOB(0x1f04884)<<< 331 Password required for admin.
Net::FTP=GLOB(0x1f04884)>>> PASS ....
Net::FTP=GLOB(0x1f04884)<<< 230 User admin logged in.
Passing credentials ....................... done
array element: Access_Sequence_DotNet_Log.html
Net::FTP=GLOB(0x1f04884)>>> PORT 192,168,2,31,14,49
Net::FTP=GLOB(0x1f04884)<<< 200 PORT command successful.
Net::FTP=GLOB(0x1f04884)>>> RETR Access_Sequence_DotNet_Log.html
Net::FTP=GLOB(0x1f04884)<<< 550 \Access_Sequence_DotNet_Log.html : can
+'t find the file
Cannot get Access_Sequence_DotNet_Log.html : Bad file descriptor
[download]

Can I get some assistance? Regards Amit

Comment on Bad File descriptor Error Select or Download Code

Replies are listed 'Best First'.
Re: Bad File descriptor Error by Anonymous Monk on Jan 04, 2011 at 07:31 UTC
You have `$ftp->get("$_") or die "Cannot get $_: $! $^E\n";` But `$!` and `$^E` aren't set by Net::FTP. The module's synopsis has a clear example of how to get the error message: `$ftp->get("that.file") or die "get failed ", $ftp->message;` [download] Note that this'll expose that 550 error that the debug output shows, which means "file unavailable" according to a FTP RFC: `550 Requested action not taken. File unavailable (e.g., file not found, no access).` [download]	[reply] [d/l] [select]
Re^2: Bad File descriptor Error by amvarma (Initiate) on Jan 04, 2011 at 07:48 UTC
Thanks a lot for quick reply. Whatever file I am trying to access is available in that location. Strangely I see a "\" is being getting added to filename by "get()". I am just passing file name as it is. Does the function get() misbehave? `Net::FTP=GLOB(0x1eb0c44)>>> PORT 192,168,2,31,14,171 Net::FTP=GLOB(0x1eb0c44)<<< 200 PORT command successful. Net::FTP=GLOB(0x1eb0c44)>>> RETR Access_Sequence_DotNet_Log.html Net::FTP=GLOB(0x1eb0c44)<<< 550 \Access_Sequence_DotNet_Log.html : can +'t find the file Cannot get Access_Sequence_DotNet_Log.html \Access_Sequence_DotNet_Log.html : can't find the file` [download] Thanks Amit	[reply] [d/l]
Re^3: Bad File descriptor Error by Anonymous Monk on Jan 04, 2011 at 07:59 UTC
I assume that the leading backslash indicates the full path the server thinks you're asking for. Note the `RETR` line shows the correct filename is sent. You might want to `print $ftp->cwd(), "\n";` before you call `->get` to make sure you're in the right directory on the server.	[reply] [d/l] [select]
Re^3: Bad File descriptor Error by ikegami (Patriarch) on Jan 04, 2011 at 16:43 UTC
Strangely I see a "\" is being getting added to filename by "get()" No, by the server. Note the direction of the arrows. "<<<" means from the server. You need to either specify an absolute path or set the cwd correctly.	[reply]
Re: Bad File descriptor Error by GrandFather (Saint) on Jan 04, 2011 at 07:12 UTC
Could it be as simple as the file doesn't exist? Sure looks that way from the logging. True laziness is hard work	[reply]
Re: Bad File descriptor Error by samarzone (Pilgrim) on Jan 04, 2011 at 08:00 UTC
am trying to get a list of log files from a mobile device `get()` tries to retrieve a file not the list of files. Why don't you use `ls()`? -- Regards - Samar	[reply] [d/l] [select]
Re^2: Bad File descriptor Error by amvarma (Initiate) on Jan 04, 2011 at 11:17 UTC
I need to download the log files from device using ftp So using get().Any other idea is welcome. Regards Amit	[reply]
Re^3: Bad File descriptor Error by cjb (Friar) on Jan 04, 2011 at 12:56 UTC
It looks like the ftp server can't find the file you're requesting. What happens if you try to download the files listed in "api_log_file.txt" using a ftp client? edited: 20110104 12:57 GMT to remove spelling mistake	[reply]
Re^3: Bad File descriptor Error by samarzone (Pilgrim) on Jan 04, 2011 at 12:42 UTC
I am not sure about the leading backslash problem but I have something to suggest. You have a file "api_log_file.txt" containing the names of files to be downloaded. You should use `ls()` to get the list of files and iterate over this list to download selected files instead of a list (@arr) from a different source. -- Regards - Samar	[reply] [d/l]