Date: Wed, 30 May 2001 14:23:49 +0000 (GMT) From: diman <diman@asd-g.com> To: Jiangyi Liu <gzjyliu@public.guangzhou.gd.cn> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Weird PT_DETACH Message-ID: <Pine.BSF.4.21.0105301420150.201-100000@portal.none.ua> In-Reply-To: <006a01c0e911$96e68720$a701160a@fatcow>
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Hope your program not named "./test" ??
I changed it to /bin/sh and it works just fine.
It was hard to debug due to my own proggie bug :)
bb.
#include <unistd.h>
#include <sys/types.h>
#include <sys/ptrace.h>
int main()
{
pid_t pid;
if(!(pid=fork())) {
/* child */
ptrace(PT_TRACE_ME, 0, 0, 0);
puts("child speaking");
execve("./test", NULL, NULL); <---------- ??
} else {
wait(0);
ptrace(PT_DETACH, pid, (caddr_t)1, 0); <---------- also
exit(0);
}
}
On Wed, 30 May 2001, Jiangyi Liu wrote:
>
> >
> > If i understand ptrace(2) manual page correctly,
> > you should use
> > ptrace(PT_DETACH,pid,(caddr_t)1,0)
> > instead of
> > ptrace(PT_DETACH,pid,0,0) .
> >
>
> If you read my first post again, you will know that indeed I've tried to use (caddr_t)1 but failed too.
>
> > BTW you code is *very hard to debug* on my 4.1.1 :)
> > What your uname -a tells you?
>
> Why? My box is 4.3-STABLE.
>
> Jiangyi
>
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