[plug] [OT] segmentation fault

[Richard]

On Thu, 2002-05-30 at 13:46, Carl Gherardi wrote:
> I assume command has memory allocated to it?
> 
> > -----Original Message-----
> > From: Richard [mailto:wpickett at iprimus.com.au]
> > Sent: Thursday, May 30, 2002 1:49 PM
> > To: plug at plug.linux.org.au
> > Subject: Re: [plug] [OT] segmentation fault
> > 
> > 
> > On Thu, 2002-05-30 at 13:40, Richard wrote:
> > > I know this is a little OT, but it's starting to drive me nuts, so I
> > > hope someone can help. I'm writing a small C program that takes
> > > arguments (file names) off the command-line, prepends a 
> > command using
> > > strcat(command, argv[x]), and then creates a pipe to the command and
> > > simply reads in and then prints out the results. When I run 
> > the program
> > > I keep getting segmentation fault errors. I have narrowed 
> > it down the
> > > the strcat(command, argv[x]) line, but I can't see any 
> > problem with it.
> > > Would any kind person like to offer a hint?
> > > 
> > > The exact line is next = strcat(command, argv[count + 1]);
> > > 
> > > Where next is an uninitialized char *,command has been 
> > initialized to
> > > "ls -l ", and count + 1 is definitely within bounds.
> > > 
> > > Any ideas would be very welcome.
> > 
> > P.S. I forgot to mention that the offending line is the first line of
> > the for loop...
> > 	for(count = 0; count < argc; count++)
<all red faced>It's always the simple things that bring us undone :-)
Many thanks.
As for perl, I just discovered this old unix c book and am playing
around with a few things.
Thanks again.