'''Why Does My File Change From Read-Only Mode To Non-Read-Only Mode, When I FTP It?'''

I am trying to ftp a file using TCL. The file is in a readonly mode in my source directory. but after i do a ftp, the file changes to non readonly mode (something i do not want .. i still want the file to be readonly).. i am using dos ftp .. any pointers will be aqppreciated.
Ashish

''March 3rd'': It sounds like that's a bug in the ftp package. Whether this is the correct/best solution, I'm not sure, but you could cache the readonly value and reset it later with something like...
  set ro [file attributes $filename -readonly]
  <insert FTP code here>
  file attributes $filename -readonly $ro


2004/10/26 - e0richt

I don't believe that FTP is supposed to preserve file modes. I had a similar problem working on a RS/6000 box. You will either have to set the file attributes after transfer or if you had a lot of files you could ftp a .tar file which will preserve file attributes when it is unrolled.
----

'''Is there any command we can send an FTP server and have it tell us whether it supports resuming?'''

According to RFC 959 [ftp://ftp.rfc-editor.org/in-notes/rfc959.txt] you can use FTP command 'REST'. Not every FTP server implements this command!

[MG] I don't know whether this is a solution that would work everywhere, but when I do

  package require ftp
  set handle [ftp::Open $server $user $pw]
  set code [lindex [::ftp::Quote $handle REST] 0]

on my FTP server, ''code'' is set to 501 (the ::ftp::Quote command returning '501 No restart point'), whereas

  set code [lindex [::ftp::Quote $handle JIBBERISH] 0]
sets ''code'' to 500 (Unknown command).

----

'''Is there any Tcl-only method to check whether I have an Internet connection active at the moment?'''

You can try to open a connection to a well known server. For instance: www.google.com port 80.

[LES] That does not solve my problem, I'm afraid. I don't like the idea of having to rely on a single site. It could be down at any one time and cause an incorrect result. The more sites I use, the more reliable the method will be, but so much slower as well. And I might want to poll the system with a fairly high frequency. It would have to some way to poll '''the system''' directly. [PowerPro] does that very well and easily, but it runs on Windows only.
----
[[[Category FAQ]]] (an illustration of a less cluttered format)