Re: Script command under NetBSD-current

[RVP <rvp%SDF.ORG@localhost>]

On Mon, 14 Jun 2021, Dave Tyson wrote:

> NetBSD cruncher2.anduin.org.uk 9.99.83 NetBSD 9.99.83 (GENERIC) #2: Tue Jun  8
> 19:42:49 GMT 2021
> root%cruncher2.anduin.org.uk@localhost:/usr/obj/sys/arch/amd64/compile/GENERIC amd64
>
> If you issue a script command, run a process with takes a little while and
> then an exit command to close the script file and return to a command prompt.
> viz:
>
> cd /usr/pkgsrc
> script /tmp/ll
> cvs update -dP
> exit
>
> what happens is you don't get a command prompt - its like the script command
> freezes and doesn't return. Issuing a ps shows the script processes:

The small patch below fixes it for me.

--- START PATCH ---
--- libexec/ld.elf_so.orig/rtld.c	2020-09-22 00:41:27.000000000 +0000
+++ libexec/ld.elf_so/rtld.c	2021-06-15 08:11:34.301709238 +0000
@@ -1750,6 +1750,8 @@
 	sigdelset(&blockmask, SIGTRAP);	/* Allow the debugger */
 	sigprocmask(SIG_BLOCK, &blockmask, mask);

+	membar_enter();
+
 	for (;;) {
 		if (atomic_cas_uint(&_rtld_mutex, 0, locked_value) == 0) {
 			membar_enter();
--- END PATCH ---

-RVP