1. RE: Duplicated files program
- Posted by rforno at tutopia.com
Jul 23, 2002
Kat:
This is not the problem. Each drive under DOS/Windows has at any time its
current dir. If I issue:
i = chdir("D:\\GAMES"), I am changing the current dir of D: (a thing I don't
want to do) and, moreover, current_dir() still returns the current dir of
C:, for example C:\ZZ.
If, instead, I write:
i = chdir("D:"), nothing happens.
What I want to know is the current dir of a drive different from the one I
am executing my program. This works with system() under ex, but not under
exw.
Please have a look to my NEWDUP.EXW program that I sent earlier.
Regards.
----- Original Message -----
From: Kat <gertie at PELL.NET>
To: EUforum <EUforum at topica.com>
Sent: Tuesday, July 23, 2002 10:14 PM
Subject: Re: Duplicated files program
>
> On 23 Jul 2002, at 21:55, rforno at tutopia.com wrote:
>
> >
> > Rob:
> > It seems I performed not enough testing on my program.
> > While I was walking for an errand, it came to my mind a subtle potential
> > error, and when I returned home, I hurried to correct it. Then I found
> > several more bugs... :(
> > Now I have fixed all of them, with two exceptions:
> > 1) The problem of walk_dir with path "/" under Linux, that I already
> > mentioned to you. I think you can fix it easily.
> > 2) There is another problem under DOS and Windows. Using ex,
system("D:", 2)
> > changes to drive D: and then current_dir() gives the path (for example)
D:\ or
> > maybe D:\GAMES. But using exw, system("D:", 2) seems to do nothing, and
after
> > that current_dir() gives (for example) C:\EUPHORIA\TEST. I am using
system("D:",
> > 2) to know what is the current dir for drive D: if one specifies on the
command
> > line (for example) D:CHESS or simply D: As a result, one has to specify
an
> > absolute path for drives that are not the current one. Please tell me if
there
> > is a solution to this problem.
>
> Syntax: include file.e
> i = chdir(s) Description: Set the current directory to the path given by
sequence
> s. s must name an existing directory on the system. If successful, chdir()
returns 1.
> If unsuccessful, chdir() returns 0.
>
> This works for me.
>
> Kat
>
>
>
>
2. RE: Duplicated files program
- Posted by rforno at tutopia.com
Jul 26, 2002
If there are more than one DOS window, each one has its current dir,
independently of the others. So, under DOS, there is no problem.
I admit I don't know what Windows does when issuing system("D:", 2)
(apparently nothing), but in
any case, in a DOS windows, it applies only to the issuing window, not
others nor to
DOS as a whole.
However, assume you have a test.bat file in drive C:, reading:
D:
cd \
dir > xx
and the current directory of D: is D:\GAMES
Then, if you execute system("test", 2), D:\xx will contain the root
directory of D:, but afterwards the current directory will be the original
from C:, and the current directory of D: will be the same as before.
----- Original Message -----
From: Juergen Luethje <jluethje at gmx.de>
To: EUforum <EUforum at topica.com>
Sent: Wednesday, July 24, 2002 9:59 AM
Subject: Re: Duplicated files program
>
> Ricardo <rforno at tutopia.com> wrote:
>
> <snip>
> > Each drive under DOS/Windows has at any time its current dir.
>
> This applies to DOS. Are you sure, that it applies to Windows, too?
> After reading
>
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/dirr
ef_6g6x.asp
> I _assume_, on Windows there is only one current directory.
>
> > If I issue:
> > i = chdir("D:\\GAMES"), I am changing the current dir of D: (a thing I
don't
> > want to do) and, moreover, current_dir() still returns the current dir
of
> > C:, for example C:\ZZ.
> > If, instead, I write:
> > i = chdir("D:"), nothing happens.
> > What I want to know is the current dir of a drive different from the one
I
> > am executing my program. This works with system() under ex, but not
under
> > exw.
>
> system() starts a new DOS shell. For example, using system("D:", 2) sets
> the current drive to D: _on DOS_.
> When you call system("D:", 2) from a Windows program, I _assume_ that
> Windows simply doesn't know what has happened on DOS.
>
> > Please have a look to my NEWDUP.EXW program that I sent earlier.
> > Regards.
> <snip>
>
> Another consideration concerning current_dir():
> What happens, when another program changes the current directory, while
> your program is running?
>
> Regards,
> Juergen
>
>
>
>
