[Tcsh] Patch: Addition: "set noexitifjobs"

[Jamie Landeg-Jones]

Whilst I'm here, here is a patch I've been running for a while that
you may want to add.

If you try to exit the shell and there is a background job running,
you get the warning "There are suspended jobs.".

This has saved me on many occasions.

The problem is, I'm often connecting through a chain of hosts, so
to finally exit, I hit CTRL-D a number of times.

Of course, by this time, if I have suspended jobs I've forgotten about,
it's too late, as the second CTRL-D will terminate the process regardless.

To this end, with this patch, if you set "noexitifjobs" then no amount
of "exit" / CTRL-D will exit the shell until you either unset "noexitifjobs"
or close the backgrounded jobs.

If you want to add this patch, I have no emotional attachment to the
name of the variable I chose - it's functionality I care about - so
I won't feel slighted if you prefer to use something else!

Cheers, Jamie

--- sh.proc.c.orig	2022-12-13 15:44:04.000000000 +0000
+++ sh.proc.c	2023-01-03 13:11:31.243229000 +0000
@@ -1674,7 +1674,9 @@
 {
     struct process *pp;
 
-    chkstop = 2;
+    if (!adrof(STRnoexitifjobs))
+	chkstop = 2;
+
     for (pp = proclist.p_next; pp; pp = pp->p_next)
 	if (pp->p_flags & PSTOPPED)
 	    stderror(ERR_STOPPED, neednl ? "\n" : "");
--- tc.const.c.orig	2021-11-01 12:36:38.000000000 +0000
+++ tc.const.c	2023-01-03 13:11:38.605600000 +0000
@@ -369,6 +369,7 @@
 Char STRsldotcshrc[]	= { '/', '.', 'c', 's', 'h', 'r', 'c', '\0' };
 Char STRsldotlogin[]	= { '/', '.', 'l', 'o', 'g', 'i', 'n', '\0' };
 Char STRignoreeof[]	= { 'i', 'g', 'n', 'o', 'r', 'e', 'e', 'o', 'f', '\0' };
+Char STRnoexitifjobs[]  = { 'n', 'o', 'e', 'x', 'i', 't', 'i', 'f', 'j', 'o', 'b', 's', '\0' };
 Char STRnoclobber[]	= { 'n', 'o', 'c', 'l', 'o', 'b', 'b', 'e', 'r', '\0' };
 Char STRnotempty[]	= { 'n', 'o', 't', 'e', 'm', 'p', 't', 'y', '\0' };
 Char STRask[]		= { 'a', 's', 'k', '\0' };
--- tcsh.man.in.orig	2022-12-17 05:57:50.000000000 +0000
+++ tcsh.man.in	2023-01-03 13:11:47.318488000 +0000
@@ -8185,6 +8185,10 @@
 .Ic prompt
 time specifiers at the change of hour.
 .
+.It Ic noexitifjobs
+If set, you may not interactively exit the shell if there are suspended jobs
+associated with it. Close or kill these jobs to allow exiting.
+.
 .It Ic noglob
 If set,
 .Sx Filename substitution