command list does not exit immediately

[ajschorr]

This looks like a bug to me. This is using tcsh 6.20.00:

bash-4.4$ csh -c 'false || exit; echo hello'
hello
bash-4.4$

Why didn't the shell exit prior to executing the 'echo hello' command?

It seems as if the exit has a delayed effect and happens only after the entire list has been executed.

In an interactive shell, one sees:

bash-4.4$ csh
schorr@ti129: false || exit; echo hello
hello
exit
bash-4.4$

[Krush206]

I got used to this behavior, thus no longer saw it as a bug. I found it useful for one-line procedures.

( exit ( -e myfile ) && ( ( echo mytext > myfile ) >& /dev/null || echo Cannot create file. ) || echo File exists.

Anyhow, this behavior can be avoided with the following patch.

--- a/sh.sem.c
+++ b/sh.sem.c
@@ -658,13 +658,15 @@ execute(struct command *t, volatile int wanttty, int *pipein, int *pipeout,
 		if (setexit() == 0)
 		    func(t, bifunc);
 		resexit(oldexit);
-		haderr = ohaderr;
 
 		if (adrof(STRprintexitvalue)) {
 		    int rv = getstatus();
 		    if (rv != 0)
 			xprintf(CGETS(17, 2, "Exit %d\n"), rv);
 		}
+		if (bifunc->bfunct == doexit && !haderr)
+		    reset();
+		haderr = ohaderr;
 	    }
 	    break;
 	}

Should be noted this doesn't work for one-line ifs, and I don't think would make a problem, since exit inherits the same expressiveness of if.