[bug #59954] wget assumes ftp server of type UNIX knows LIST -a command while this is not always true

[Arkadiusz Miskiewicz]

URL:
  <https://savannah.gnu.org/bugs/?59954>

                 Summary: wget assumes ftp server of type UNIX knows LIST -a
command while this is not always true
                 Project: GNU Wget
            Submitted by: arekm
            Submitted on: Wed 27 Jan 2021 11:03:24 AM CET
                Category: Protocol Issue
                Severity: 3 - Normal
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: 1.20
         Discussion Lock: Any
        Operating System: None
         Reproducibility: Every Time
           Fixed Release: None
         Planned Release: None
              Regression: None
           Work Required: None
          Patch Included: None

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Details:

wget -d ftp://ftp.sudo.ws/pub/sudo/

and there is no listing returned

that's because server doesn't support LIST -a while wget insists on using LIST
-a

Server returns "ftpd: -a: No such file or directory" for LIST -a which wget
doesn't notice as error.

$ ./wget -d ftp://ftp.sudo.ws/pub/sudo/
DEBUG output created by Wget 1.21.1 on linux-gnu.

Reading HSTS entries from /home/users/arekm/.wget-hsts
URI encoding = ‘UTF-8’
Converted file name 'index.html' (UTF-8) -> 'index.html' (UTF-8)
Using ‘.listing’ as listing tmp file.
--2021-01-27 10:46:45--  ftp://ftp.sudo.ws/pub/sudo/
           => ‘.listing’
Resolving ftp.sudo.ws (ftp.sudo.ws)... 65.102.237.118
Caching ftp.sudo.ws => 65.102.237.118
Connecting to ftp.sudo.ws (ftp.sudo.ws)|65.102.237.118|:21... connected.
Created socket 3.
Releasing 0x000000000224f430 (new refcount 1).
220 xerxes.sudo.ws FTP server ready.
Logging in as anonymous ...
--> USER anonymous

331 Guest login ok, send your email address as password.

--> PASS -wget@

230-   Welcome to ftp.sudo.ws in sunny Boulder, CO.
230-   This is the master ftp site for the `sudo' sysadmin utility.
230-
230-   For sudo, go to /pub/sudo
230-   For the sudo web page, visit https://www.sudo.ws/
230-
230-   All transfers are logged with your host and email address.
230-   If you don't like this policy, disconnect now!
230-
230-   Illegitimus Non Carborundum Est
230-
230 Guest login ok, access restrictions apply.
Logged in!
==> SYST ...
--> SYST

215 UNIX Type: L8
done.
UNIX TYPE L8: I know it and I will use "LIST -a" as standard list command
==> PWD ...
--> PWD

257 "/" is current directory.
done.
==> TYPE I ...
--> TYPE I

200 Type set to I.
done.  changing working directory
Prepended initial PWD to relative path:
   pwd: '/'
   old: 'pub/sudo'
  new: '/pub/sudo'
==> CWD (1) /pub/sudo ...
--> CWD /pub/sudo

250 CWD command successful.
done.
conaddr is: 65.102.237.118
==> PASV ...
--> PASV

227 Entering Passive Mode (65,102,237,118,231,91)
trying to connect to 65.102.237.118 port 59227
Created socket 4.
done.    ==> LIST ...
--> LIST -a

150 Opening BINARY mode data connection for '-a'.
(skipping "LIST")done.

.listing                                                       [ <=>          
                                                                              
                                        ]      36  --.-KB/s    in 0s

Closed fd 4
226 Transfer complete.
2021-01-27 10:46:52 (4.17 MB/s) - ‘.listing’ saved [36]

LINIA: ftpd: -a: No such file or directory
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - it's my added printf("%s",
line) to see what is being returned


UNKNOWN; perms 0;
Skipping.
Removed ‘.listing’.
Converted file name 'index.html' (UTF-8) -> 'index.html' (UTF-8)
Wrote HTML-ized index to ‘index.html’ [212].
Closed fd 3




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