1. system() and copy in DOS
Hello Everyone!
I am currently working an application that is mainly for Linux, but I am
trying to make it cross platform. If the user starts the application
with the command option -g, the application will copy a template
configuration file from its home directory into the user's current
directory.
In Linux, this works fine. However, in Windows XP I'm having a bit of a
problem because the filename being copied is truncated to eight
characters. Apparently it is a problem with long filenames, which as I
recall Euphoria has had some issues with in the past. I don't think
that it is Euphoria though, because of the fact that Euphoria isn't
actually doing the copying, it is simply calling the DOS copy command
via a call to system().
Here is the relevant code, which further description below.
-- start code
function copyTemplate(sequence name)
integer ok, loc
sequence bkname
if giOperatingSystem = LINUX then
system("cp -f --backup " & sWhereAmI & "Eudoxy.tpl " & name, 2)
ok = sequence(dir(name))
else
if sequence(dir(name)) then
bkname = reverse(name)
loc = find('.', bkname)
if loc != 0 then
bkname = reverse(bkname[loc .. length(bkname)]) & "bak"
else
bkname = reverse(bkname) & ".bak"
end if
if sequence(dir(bkname)) then
system("del " & bkname, 2)
end if
system("copy " & name & " " & bkname, 2)
system("del " & name, 2)
end if
-- Here's where things get all ate up.
system("copy " & sWhereAmI & "Eudoxy.tpl " & name, 2)
ok = sequence(dir(name))
end if
if ok then
puts(1, "\n\n" &
"A template configuration file named " & name & " has been\n"
&
"created for you in the directory from which you called\n" &
"eudoxy.\n\n" &
"To customize eudoxy's settings, just edit that file. For\n" &
"more information, see the notes in the template file, or\n" &
"eudoxy's documentation.\n\n" &
"Bye!\n")
return 1
else
puts(1, "eudoxy: error: unable to create " & name & "\n\n")
return 0
end if
end function
-- end code
Okay, looking at the ex.err file, I confirmed that the following
variables have the following values:
sWhereAmI = "c:\\maple4\\eudoxy\\src"
name = "Eudoxyfile"
bkname = "Eudoxyfile.bak"
Now, based upon these values, the command that system() should be
issuing is:
copy c:\maple4\eudoxy\src\Eudoxy.tpl Eudoxyfile
The file that I'm getting when this is executed via system() is EUDOXYFI
I've typed in the above command manually at the DOS prompt, and it works
fine, resulting in the file EUDOXYFILE. I can't quite understand what
is going on here, because it seems that copy is displaying two different
behaviors based upon whether or not it is being called from Euphoria.
This might be a real simple thing I'm just not getting. If anyone could
shed some light on this, I'd appreciate it.
Thanks!
Travis Beaty
Osage, Iowa.
P.S. As a side note, the DOS command window in XP is flaky as hell.
2. Re: system() and copy in DOS
Travis Beaty wrote:
> In Linux, this works fine. However, in Windows XP I'm having a bit of a
> problem because the filename being copied is truncated to eight
> characters. Apparently it is a problem with long filenames, which as I
> recall Euphoria has had some issues with in the past. I don't think
> that it is Euphoria though, because of the fact that Euphoria isn't
> actually doing the copying, it is simply calling the DOS copy command
> via a call to system().
When you run the system() command in ex.exe,
XP runs an old version of DOS that
only supports 8.3 filenames.
If you run system() using exw.exe
(or exwc.exe - see euphoria\bin\makecon.exw)
you'll get full support for long filenames.
Regards,
Rob Craig
Rapid Deployment Software
http://www.RapidEuphoria.com
3. Re: system() and copy in DOS
Hello all,
Rob wrote:
> Travis Beaty wrote:
>> In Linux, this works fine. However, in Windows XP I'm having a bit of a
>> problem because the filename being copied is truncated to eight
>> characters. Apparently it is a problem with long filenames, which as I
>> recall Euphoria has had some issues with in the past. I don't think
>> that it is Euphoria though, because of the fact that Euphoria isn't
>> actually doing the copying, it is simply calling the DOS copy command
>> via a call to system().
>
> When you run the system() command in ex.exe,
> XP runs an old version of DOS that
> only supports 8.3 filenames.
In that situation, *long* filenames can be processed by using my library
"Lfn.zip" from the user contributions page.
Instead of
system("del " & bkname, 2)
system("copy " & name & " " & bkname, 2)
one has then to write
system("del " & short_name(bkname), 2)
system("copy " & short_name(name) & " " & short_name(bkname), 2)
> If you run system() using exw.exe
> (or exwc.exe - see euphoria\bin\makecon.exw)
> you'll get full support for long filenames.
Best regards,
Juergen
--
The difference between men and boys
is the price of the toys.
4. Re: system() and copy in DOS
Me wrote:
> Rob wrote:
>
>> Travis Beaty wrote:
>>> In Linux, this works fine. However, in Windows XP I'm having a bit of a
>>> problem because the filename being copied is truncated to eight
>>> characters. Apparently it is a problem with long filenames, which as I
>>> recall Euphoria has had some issues with in the past. I don't think
>>> that it is Euphoria though, because of the fact that Euphoria isn't
>>> actually doing the copying, it is simply calling the DOS copy command
>>> via a call to system().
>>
>> When you run the system() command in ex.exe,
>> XP runs an old version of DOS that
>> only supports 8.3 filenames.
>
>
> In that situation, *long* filenames can be processed by using my library
> "Lfn.zip" from the user contributions page.
> Instead of
> system("del " & bkname, 2)
> system("copy " & name & " " & bkname, 2)
>
> one has then to write
> system("del " & short_name(bkname), 2)
> system("copy " & short_name(name) & " " & short_name(bkname), 2)
^^^^^^^^^^^^^^^^^^
Oops. If forgot to mention, that this may not lead to the desired
result. 'short_name(file)' only works as expected, if 'file' already
exists. To achieve this, don't delete it before copying. If the
destination file does *not* already exist, just let your program first
create a small destination file with the desired long 'bkname'.
BTW: I personally prefer to let my program copy the data itself, using a
small while() loop. I don't know, which method is faster.
>> If you run system() using exw.exe
>> (or exwc.exe - see euphoria\bin\makecon.exw)
>> you'll get full support for long filenames.
Best regards,
Juergen
--
The difference between men and boys
is the price of the toys.
5. Re: system() and copy in DOS
Hello!
Okay, thanks everyone. Juergen, I'll look into the library. I wanted
to try to have all the include files be cross-platform, but it's now
looking more like I'm going to have to make a separate include file
which contains all the platform-specific code. I guess that's okay,
just not how I originally planned.
Thanks everyone!
Travis Beaty
Osage, Iowa.
Juergen Luethje wrote:
>
>
> Me wrote:
>
>
>>Rob wrote:
>>
>>
>>>Travis Beaty wrote:
>>>
>>>>In Linux, this works fine. However, in Windows XP I'm having a bit of a
>>>>problem because the filename being copied is truncated to eight
>>>>characters. Apparently it is a problem with long filenames, which as I
>>>>recall Euphoria has had some issues with in the past. I don't think
>>>>that it is Euphoria though, because of the fact that Euphoria isn't
>>>>actually doing the copying, it is simply calling the DOS copy command
>>>>via a call to system().
>>>
>>>When you run the system() command in ex.exe,
>>>XP runs an old version of DOS that
>>>only supports 8.3 filenames.
>>
>>
>>In that situation, *long* filenames can be processed by using my library
>>"Lfn.zip" from the user contributions page.
>>Instead of
>> system("del " & bkname, 2)
>> system("copy " & name & " " & bkname, 2)
>>
>>one has then to write
>> system("del " & short_name(bkname), 2)
>> system("copy " & short_name(name) & " " & short_name(bkname), 2)
>
> ^^^^^^^^^^^^^^^^^^
> Oops. If forgot to mention, that this may not lead to the desired
> result. 'short_name(file)' only works as expected, if 'file' already
> exists. To achieve this, don't delete it before copying. If the
> destination file does *not* already exist, just let your program first
> create a small destination file with the desired long 'bkname'.
>
> BTW: I personally prefer to let my program copy the data itself, using a
> small while() loop. I don't know, which method is faster.
>
>
>>>If you run system() using exw.exe
>>>(or exwc.exe - see euphoria\bin\makecon.exw)
>>>you'll get full support for long filenames.
>
>
> Best regards,
> Juergen
>
