From: Dimitry Andric <dimitry@unified-streaming.com>
To: Takashi Yano <takashi.yano@nifty.ne.jp>
Cc: cygwin@cygwin.com
Subject: Re: Bogus exit code 127 from a child process
Date: Sun, 17 Mar 2024 14:10:55 +0100 [thread overview]
Message-ID: <259F0ECF-9AE8-42E7-A746-8227F8B7870C@unified-streaming.com> (raw)
In-Reply-To: <8F45EC6F-A035-449B-89D0-065FAE3FC157@unified-streaming.com>
On 17 Mar 2024, at 13:50, Dimitry Andric <dimitry@unified-streaming.com> wrote:
>
> On 17 Mar 2024, at 13:35, Takashi Yano via Cygwin <cygwin@cygwin.com> wrote:
> ...
>>
>> I also test your test case:
>> while bash -c 'true & true & wait -n || { echo 1: $?; exit 1; } && wait -n || { echo 2: $?; exit 1; }'; do echo $((i++)); done
>> in Linux (Debian 12.5), and the issue reproduced!
>
> Yeah, same here with bash 5.1.16(1)-release on Ubuntu 22.04. It errors out with 127 after ~50-200 loops.
Having built bash master (bash-5.2-27-gf3b6bd19) here, it consistently gives 127 in this area:
https://git.savannah.gnu.org/cgit/bash.git/tree/builtins/wait.def#n227
211 #if defined (JOB_CONTROL)
212 if (nflag)
213 {
214 if (list)
215 {
216 opt = set_waitlist (list);
217 if (opt == 0)
218 WAIT_RETURN (127);
219 wflags |= JWAIT_WAITING;
220 }
221
222 status = wait_for_any_job (wflags, &pstat);
223 if (vname && status >= 0)
224 builtin_bind_var_to_int (vname, pstat.pid, bindflags);
225
226 if (status < 0)
=> 227 status = 127;
228 if (list)
229 unset_waitlist ();
230 WAIT_RETURN (status);
231 }
232 #endif
So for some reason, wait_for_any_job() returns a negative value in this particular situation.
-Dimitry
next prev parent reply other threads:[~2024-03-17 13:10 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-17 8:14 Alexey Izbyshev
2024-03-17 8:44 ` Takashi Yano
2024-03-17 9:01 ` Alexey Izbyshev
2024-03-17 9:27 ` Takashi Yano
2024-03-17 10:03 ` Alexey Izbyshev
2024-03-17 10:21 ` Takashi Yano
2024-03-17 12:03 ` Takashi Yano
2024-03-17 12:15 ` Takashi Yano
2024-03-17 12:35 ` Takashi Yano
2024-03-17 12:50 ` Dimitry Andric
2024-03-17 13:10 ` Dimitry Andric [this message]
2024-03-18 3:09 ` Takashi Yano
2024-03-18 4:58 ` Takashi Yano
2024-03-18 11:08 ` Alexey Izbyshev
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