system question

[David Schwartz]

I'm writing a little c program and one of things I'm trying to get it to do
is cd to a particular directory and then run an exe that is on my path, as
follows...

strcpy(working_ string, "c:\\davedata\\ bats\\ks.exe fnord");
system("cd \\playtime\\d\\ build\\html");
system(working_ string);

But ks.exe does not seem to be invoked on the files in the
\\playtime\\d\\ build\\html directory.

Can someone tell me how to do this?

[Jens.Toerring@physik.fu-berlin.de]

Re: system question

David Schwartz <david_vcp@hotm ail.com> wrote:[color=blue]
> I'm writing a little c program and one of things I'm trying to get it to do
> is cd to a particular directory and then run an exe that is on my path, as
> follows...[/color]
[color=blue]
> strcpy(working_ string, "c:\\davedata\\ bats\\ks.exe fnord");
> system("cd \\playtime\\d\\ build\\html");
> system(working_ string);[/color]
[color=blue]
> But ks.exe does not seem to be invoked on the files in the
> \\playtime\\d\\ build\\html directory.[/color]
[color=blue]
> Can someone tell me how to do this?[/color]

The first invocation of system() creates a shell in which you do the 'cd'.
Then the shell exits. As the next step you invoke a completely new shell
by calling system() again that has no idea about the working directory of
the other shell that's already dead. Execute both commands in the _same_
call of system().
Regards, Jens
--
\ Jens Thoms Toerring ___ Jens.Toerring@p hysik.fu-berlin.de
\______________ ____________ http://www.toerring.de

[Dan Pop]

Re: system question

In <c5j8k0$2c9dm$1 @uni-berlin.de> Jens.Toerring@p hysik.fu-berlin.de writes:
[color=blue]
>David Schwartz <david_vcp@hotm ail.com> wrote:[color=green]
>> I'm writing a little c program and one of things I'm trying to get it to do
>> is cd to a particular directory and then run an exe that is on my path, as
>> follows...[/color]
>[color=green]
>> strcpy(working_ string, "c:\\davedata\\ bats\\ks.exe fnord");
>> system("cd \\playtime\\d\\ build\\html");
>> system(working_ string);[/color]
>[color=green]
>> But ks.exe does not seem to be invoked on the files in the
>> \\playtime\\d\\ build\\html directory.[/color]
>[color=green]
>> Can someone tell me how to do this?[/color]
>
>The first invocation of system() creates a shell in which you do the 'cd'.
>Then the shell exits. As the next step you invoke a completely new shell
>by calling system() again that has no idea about the working directory of
>the other shell that's already dead. Execute both commands in the _same_
>call of system().[/color]

And if your shell doesn't allow this directly, build a script
containing the two commands and execute that script with system().

Dan
--
Dan Pop
DESY Zeuthen, RZ group
Email: Dan.Pop@ifh.de

[CBFalconer]

Re: system question

David Schwartz wrote:[color=blue]
>
> I'm writing a little c program and one of things I'm trying to
> get it to do is cd to a particular directory and then run an exe
> that is on my path, as follows...
>
> strcpy(working_ string, "c:\\davedata\\ bats\\ks.exe fnord");
> system("cd \\playtime\\d\\ build\\html");
> system(working_ string);
>
> But ks.exe does not seem to be invoked on the files in the
> \\playtime\\d\\ build\\html directory.
>
> Can someone tell me how to do this?[/color]

Not here. The C language has neither directories nor exes nor
paths. You want a group dealing with your peculiar system, which
I suspect to be either Windows or MsDos.

--
Chuck F (cbfalconer@yah oo.com) (cbfalconer@wor ldnet.att.net)
Available for consulting/temporary embedded and systems.
<http://cbfalconer.home .att.net> USE worldnet address!