From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from picard.linux.it (picard.linux.it [213.254.12.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A821DC433F5 for ; Thu, 27 Jan 2022 06:14:03 +0000 (UTC) Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id 0ABE13C970F for ; Thu, 27 Jan 2022 07:14:02 +0100 (CET) Received: from in-7.smtp.seeweb.it (in-7.smtp.seeweb.it [IPv6:2001:4b78:1:20::7]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by picard.linux.it (Postfix) with ESMTPS id 5BCDB3C96C0 for ; Thu, 27 Jan 2022 07:13:09 +0100 (CET) Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by in-7.smtp.seeweb.it (Postfix) with ESMTPS id 308D020015B for ; Thu, 27 Jan 2022 07:13:07 +0100 (CET) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id 6D2EE2190B; Thu, 27 Jan 2022 06:13:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1643263987; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Em7u5q4Ek3BfNbo2rYhS8/QrS1/B0XyCjc/uHKk4NIk=; b=uHWNro7jjYnBdHSXF+V0reqPNWze9adFUkS8sSdRrJ1kdPBxVeMerZlD1OvnVHLRxvAJFS NiLatnbZ85ywQ5/2bNiavbpQ67/ejP0o+DFLY2B8nzTfIEig8vtdIDCBCF5+RuGRhCs3/n V9YlXlk8CpHfEM4fDyI2DEOwjPARHXY= Received: from g78.suse.de (unknown [10.163.24.90]) by relay2.suse.de (Postfix) with ESMTP id 3EE50A3B81; Thu, 27 Jan 2022 06:13:07 +0000 (UTC) To: ltp@lists.linux.it Date: Thu, 27 Jan 2022 06:12:21 +0000 Message-Id: <20220127061225.23368-3-rpalethorpe@suse.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220127061225.23368-1-rpalethorpe@suse.com> References: <20220127061225.23368-1-rpalethorpe@suse.com> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.102.4 at in-7.smtp.seeweb.it X-Virus-Status: Clean Subject: [LTP] [PATCH 2/6] API: Add tst_reap_child X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Richard Palethorpe via ltp Reply-To: Richard Palethorpe Cc: Richard Palethorpe Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" Add a simple way to wait for a specific child process. This makes sense when you want to wait for a child while others continue to run in the background. Signed-off-by: Richard Palethorpe --- include/tst_test.h | 6 ++++++ lib/tst_test.c | 22 ++++++++++++++++++++++ 2 files changed, 28 insertions(+) diff --git a/include/tst_test.h b/include/tst_test.h index 450ddf086..8faf19141 100644 --- a/include/tst_test.h +++ b/include/tst_test.h @@ -106,6 +106,12 @@ pid_t safe_fork(const char *filename, unsigned int lineno); */ void tst_reap_children(void); +/* + * Wait for one child and exit with TBROK if it returns a non-zero + * exit status + */ +void tst_reap_child(pid_t child); + struct tst_option { char *optstr; char **arg; diff --git a/lib/tst_test.c b/lib/tst_test.c index 844756fbd..156a1e4b3 100644 --- a/lib/tst_test.c +++ b/lib/tst_test.c @@ -416,6 +416,28 @@ void tst_reap_children(void) } } +void tst_reap_child(const pid_t pid) +{ + int status; + + for (;;) { + const pid_t ret_pid = waitpid(pid, &status, 0); + + if (ret_pid > 0) { + check_child_status(ret_pid, status); + continue; + } + + if (errno == ECHILD) + break; + + if (errno == EINTR) + continue; + + tst_brk(TBROK | TERRNO, "waitpid(%d, ...) failed", pid); + } +} + pid_t safe_fork(const char *filename, unsigned int lineno) { -- 2.34.1 -- Mailing list info: https://lists.linux.it/listinfo/ltp