From owner-freebsd-questions@FreeBSD.ORG  Wed Oct 12 21:03:57 2005
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Date: Wed, 12 Oct 2005 22:03:43 +0100
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Cc: "Michael C. Shultz" <ringworm01@gmail.com>
Subject: Re: portmanager
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On Wednesday 12 October 2005 20:42, Michael C. Shultz wrote:
> On Sunday 09 October 2005 07:53, Michael Lednev wrote:
> > Hello, freebsd-questions.
> >
> > anyone  tried  to  run  portmanager  from  crontab?  as for me it just
> > coredumps, what am i doing wrong? its simply 0 0 * * * portmanager -s
>
> I'm not sure how to fix it but I've found where portmanager crashes
> when run from cron, the code is:
>
>
>        if( !strncmp( getenv("TERM"), "xterm", 5 ) && isatty(fileno(stdout))
> ) {
>                stringSize      = strlen( id )
>                                + 1
>                                + strlen( VERSION )
>                                + 1;
>                xtermTitle      = malloc( stringSize );
>                xtermTitle[0]   = 0;
>                strcat( xtermTitle, id );
>                strcat( xtermTitle, " " );
>                strcat( xtermTitle, VERSION );
>                printf( "%c]0;%s%c", '\033', xtermTitle, '\007' );
>                free( xtermTitle );
>        }
>
>
> This is used to put information in the xterm title screen while portmanager
> is running, I don't know enough about cron to have a clue how to fix this
> except to remove it and I don't want to do that.  Anyone have any ideas?

I think getenv() returns NULL if a variable isn't defined, and strncmp() will 
try to dereference any pointer it's given without checking.