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[87.251.56.140]) by smtp.gmail.com with ESMTPSA id h17-20020a170906111100b00a46aafc6948sm1381507eja.74.2024.03.17.06.10.55 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 17 Mar 2024 06:10:55 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3731.700.6.1.1\)) Subject: Re: Bogus exit code 127 from a child process From: Dimitry Andric In-Reply-To: <8F45EC6F-A035-449B-89D0-065FAE3FC157@unified-streaming.com> Date: Sun, 17 Mar 2024 14:10:55 +0100 Cc: cygwin@cygwin.com Content-Transfer-Encoding: quoted-printable Message-Id: <259F0ECF-9AE8-42E7-A746-8227F8B7870C@unified-streaming.com> References: <20240317174402.4a3e73a7fca2f5978ac93913@nifty.ne.jp> <61d4fca73047915567fc9b4aac2860a3@ispras.ru> <20240317182757.84b41a596c344f395c1d8f9a@nifty.ne.jp> <20240317192116.b00f24c9ee065f16d6ac6673@nifty.ne.jp> <20240317210358.ad701873dc5cfc9a3026dc0c@nifty.ne.jp> <20240317211517.40cfbe0a664f7c7fe3d6e73d@nifty.ne.jp> <20240317213548.652be777a51f00108414d9bf@nifty.ne.jp> <8F45EC6F-A035-449B-89D0-065FAE3FC157@unified-streaming.com> To: Takashi Yano X-Mailer: Apple Mail (2.3731.700.6.1.1) X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,JMQ_SPF_NEUTRAL,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,TXREP,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On 17 Mar 2024, at 13:50, Dimitry Andric = wrote: >=20 > On 17 Mar 2024, at 13:35, Takashi Yano via Cygwin = wrote: > ... >>=20 >> 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! >=20 > 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 =3D set_waitlist (list); 217 if (opt =3D=3D 0) 218 WAIT_RETURN (127); 219 wflags |=3D JWAIT_WAITING; 220 } 221 222 status =3D wait_for_any_job (wflags, &pstat); 223 if (vname && status >=3D 0) 224 builtin_bind_var_to_int (vname, pstat.pid, bindflags); 225 226 if (status < 0) =3D> 227 status =3D 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