I am using exec in following way.

execl("/usr/bin/cksum","/usr/bin/cksum",rfile,(char*)NULL))


But I want to store the output in file. Like I can do on command line (
cksum filename > tempfile).  How can I do this using exec.

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friend_05 wrote:
> I am using exec in following way.
>
> execl("/usr/bin/cksum","/usr/bin/cksum",rfile,(char*)NULL))
>
>
> But I want to store the output in file. Like I can do on command line (
> cksum filename > tempfile).  How can I do this using exec.
>
You need to use popen.

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Robert Harris wrote:

> friend_05 wrote:
> 
> You need to use popen.

In this case, is there any need to make a child??
Why not just:

tfd=open("tempfile"...);
if (tfd != -1)
{
if (tfd != 1)
{
dup2(tfd, 1);
close(tfd);
}
execl(....);
}
..error...







--
Clem
"If you push something hard enough, it will fall over."
- Fudd's first law of opposition

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