[BusyBox] Lash and uClinux

[Fabrice Gautier]

Hi,

I'm using (trying to use) lash as my shell on a uClinux target.

It doesn't work and i'm suspicious of this code being part of the problem:

it's in the run_command function (lash.c:1350)

#if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__)
		if (!(child->pid = fork()))
#else
		if (!(child->pid = vfork()))
#endif
		{
			/* Set the handling for job control signals back to
the default.  */
			signal(SIGINT, SIG_DFL);
			signal(SIGQUIT, SIG_DFL);
			signal(SIGTSTP, SIG_DFL);
			signal(SIGTTIN, SIG_DFL);
			signal(SIGTTOU, SIG_DFL);
			signal(SIGCHLD, SIG_DFL);

			close_all();



The problem is that, in uClinux, we use vfork and then in close_all we reset
the close_me_head variable used for the mark_open/mark_closed function. So
in the end when mark_closed is called it detect a corrupted close_me_head.
And fails.

What's the point of the close_all here? Even when fork is used how is it
usefull ?

And also, has anybody used lash on uClinux? Is it safe ? If not which shell
is "vfork-safe" ?

Thanks.

-- 
Fabrice Gautier, 
Fabrice_Gautier at sdesigns.com


-- 
Fabrice Gautier
Software Engineer, Sigma Designs
Fabrice_Gautier at sdesigns.com