Re: OT: How to call unix shell scripts from 'C'?

the basics are they i want 'C' so i can use a file pointer. I need to do some search and replace in a group of files. If I use straight scripting I have to redirect the output to a new file and do a 'mv' to rename it back.

with the filepointer, I was hoping to be to use fopen in C to open the file and then manipulate it with search and replace.

not sure its possible. I Think you run into the same 'random access' issues you do in java. im pretty weak in C programming. ----- Original Message -----
To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Wednesday, October 22, 2003 12:14 PM

> If you want the "C" program and the spawned shell script to
> "interact" and communicate back and forth with each other,
> then you'd have to use the "pipe()" system call to set up a
> two-way interprocess-communication pipe in the "C" program,
> then call "fork()" to spawn a new identical process
> (including the IPC pipes), then finally "exec()" in the
> child process to bring the image of the desired shell
> running it's shell script in. Of course, each port of "C"
> has variations on those basic function call (i.e. "exec()"
> can be "execv()", "execve()", "execle()", etc).
>
> If you're just going to have the "C" program spawn the shell
> script that will operate independently of its parent, you
> can just call the "system()" library call and be done with
> it...
>
> Hope this helps...
>
> -Tim
>
>
> > The unix and C forums are pretty inactive. Hope its ok to
> > ask this here.
> > Anyone know how to do this?
> >
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  INET: rgaffuri_at_cox.net

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