From patchwork Wed Sep 15 20:36:17 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Hostetler X-Patchwork-Id: 12497419 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4018C433FE for ; Wed, 15 Sep 2021 20:36:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 95D526103E for ; Wed, 15 Sep 2021 20:36:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232052AbhIOUhw (ORCPT ); Wed, 15 Sep 2021 16:37:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60090 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231490AbhIOUho (ORCPT ); Wed, 15 Sep 2021 16:37:44 -0400 Received: from mail-wr1-x42f.google.com (mail-wr1-x42f.google.com [IPv6:2a00:1450:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5D789C0613CF for ; Wed, 15 Sep 2021 13:36:24 -0700 (PDT) Received: by mail-wr1-x42f.google.com with SMTP id i23so5876206wrb.2 for ; Wed, 15 Sep 2021 13:36:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:in-reply-to:references:from:date:subject:fcc :content-transfer-encoding:mime-version:to:cc; bh=qbJv3yQE130l2dg1VoZZP6a509XxMSMZ7Jrxs69dQ6s=; b=pGWLuszBDBuHlXir0oSSbpSWVs9flRl8lrvgH03Hm7sb3jf9dXmQpSzwVtOmGNGrCV 1PD1yYy2MBWIt3oqtvYMiNFDfvMbeUfBvLRuyMJmU8H+WVCRuRDWgReSsY+P2H58Dc5b JxoYNGMIq03+emXVI7ABKD/HzgdBTb6mSnPN1MXQ47dtuPaamxdVVHptriHSyWZuL0uZ Ou8EYPHjuUExszJxlRVYyaU7oIyy953NPnk9pvysf/PSS6/VFNib2xPS/x2bjOv0mOSz M970cwCk8/rVVqjA6AfC2qd44G11uDV+Q3YfJsFfHz3nlt3N3fgcUEVsYSm+iC9cnRUF qD6A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:in-reply-to:references:from:date :subject:fcc:content-transfer-encoding:mime-version:to:cc; bh=qbJv3yQE130l2dg1VoZZP6a509XxMSMZ7Jrxs69dQ6s=; b=qbIFtiZqu6ClmnY0ybNIAyy6vpTy0SgLfWkGczvlySqgiPmA8QO5ZfhS9J8GdW20Bm 2M2NBY7PCABRTz67oWCvVX3EvOcAuRhZ35F+XjTTeApLZ/ORH7fd+ufEi1jNcFyg0s5r xZpLxToioRvw3rXNgu5Y991c7eItTs45G6WmwGO2eImmPM+4wrq78TDdpITdO9CXEL+T QBgaJx7RgDgZxBwx96v3QmDGKa+zWti6yFPgXocoMGOkUhACPO7kY7az+AOpkdmojdw4 7owa8MG5ErUxMfYS5ElXT2KSCI5R165cosC6yDdtmCR2lbsedXJpa2qepM44OO8aGzhZ UEqA== X-Gm-Message-State: AOAM5311MatuPaWm/50XXEksXezp+olRm1vHaVW7WNU87+L2wSvjh32c KPYVmhV08zUeUK2xruls8UOgnRVGG/8= X-Google-Smtp-Source: ABdhPJxYVlBCnXm9YKkK8m0L6H+tX2EPNHLWt5odNMQPCCpIE2TysL7L8o6ZwMhuzFArFuk//UkSkw== X-Received: by 2002:adf:816f:: with SMTP id 102mr2082076wrm.368.1631738182896; Wed, 15 Sep 2021 13:36:22 -0700 (PDT) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id d5sm1103219wra.38.2021.09.15.13.36.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Sep 2021 13:36:22 -0700 (PDT) Message-Id: <57f29feaadb4a732892cd193b2a1d3c838f09421.1631738177.git.gitgitgadget@gmail.com> In-Reply-To: References: Date: Wed, 15 Sep 2021 20:36:17 +0000 Subject: [PATCH 7/7] t/helper/simple-ipc: convert test-simple-ipc to use start_bg_command Fcc: Sent MIME-Version: 1.0 To: git@vger.kernel.org Cc: Jeff Hostetler , Jeff Hostetler Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Jeff Hostetler From: Jeff Hostetler Convert test helper to use `start_bg_command()` when spawning a server daemon in the background rather than blocks of platform-specific code. Signed-off-by: Jeff Hostetler --- t/helper/test-simple-ipc.c | 193 ++++++++----------------------------- 1 file changed, 40 insertions(+), 153 deletions(-) diff --git a/t/helper/test-simple-ipc.c b/t/helper/test-simple-ipc.c index 91345180750..59a950f3b00 100644 --- a/t/helper/test-simple-ipc.c +++ b/t/helper/test-simple-ipc.c @@ -9,6 +9,7 @@ #include "parse-options.h" #include "thread-utils.h" #include "strvec.h" +#include "run-command.h" #ifndef SUPPORTS_SIMPLE_IPC int cmd__simple_ipc(int argc, const char **argv) @@ -274,178 +275,64 @@ static int daemon__run_server(void) return ret; } -#ifndef GIT_WINDOWS_NATIVE -/* - * This is adapted from `daemonize()`. Use `fork()` to directly create and - * run the daemon in a child process. - */ -static int spawn_server(pid_t *pid) -{ - struct ipc_server_opts opts = { - .nr_threads = cl_args.nr_threads, - }; +static start_bg_wait_cb bg_wait_cb; - *pid = fork(); - - switch (*pid) { - case 0: - if (setsid() == -1) - error_errno(_("setsid failed")); - close(0); - close(1); - close(2); - sanitize_stdfds(); +static int bg_wait_cb(void *cb_data, const struct child_process *cp) +{ + int s = ipc_get_active_state(cl_args.path); - return ipc_server_run(cl_args.path, &opts, test_app_cb, - (void*)&my_app_data); + switch (s) { + case IPC_STATE__LISTENING: + /* child is "ready" */ + return 0; - case -1: - return error_errno(_("could not spawn daemon in the background")); + case IPC_STATE__NOT_LISTENING: + case IPC_STATE__PATH_NOT_FOUND: + /* give child more time */ + return 1; default: - return 0; + case IPC_STATE__INVALID_PATH: + case IPC_STATE__OTHER_ERROR: + /* all the time in world won't help */ + return -1; } } -#else -/* - * Conceptually like `daemonize()` but different because Windows does not - * have `fork(2)`. Spawn a normal Windows child process but without the - * limitations of `start_command()` and `finish_command()`. - */ -static int spawn_server(pid_t *pid) -{ - char test_tool_exe[MAX_PATH]; - struct strvec args = STRVEC_INIT; - int in, out; - - GetModuleFileNameA(NULL, test_tool_exe, MAX_PATH); - - in = open("/dev/null", O_RDONLY); - out = open("/dev/null", O_WRONLY); - - strvec_push(&args, test_tool_exe); - strvec_push(&args, "simple-ipc"); - strvec_push(&args, "run-daemon"); - strvec_pushf(&args, "--name=%s", cl_args.path); - strvec_pushf(&args, "--threads=%d", cl_args.nr_threads); - - *pid = mingw_spawnvpe(args.v[0], args.v, NULL, NULL, in, out, out); - close(in); - close(out); - - strvec_clear(&args); - if (*pid < 0) - return error(_("could not spawn daemon in the background")); - - return 0; -} -#endif - -/* - * This is adapted from `wait_or_whine()`. Watch the child process and - * let it get started and begin listening for requests on the socket - * before reporting our success. - */ -static int wait_for_server_startup(pid_t pid_child) +static int daemon__start_server(void) { - int status; - pid_t pid_seen; - enum ipc_active_state s; - time_t time_limit, now; + struct child_process cp = CHILD_PROCESS_INIT; + enum start_bg_result sbgr; - time(&time_limit); - time_limit += cl_args.max_wait_sec; + strvec_push(&cp.args, "test-tool"); + strvec_push(&cp.args, "simple-ipc"); + strvec_push(&cp.args, "run-daemon"); + strvec_pushf(&cp.args, "--name=%s", cl_args.path); + strvec_pushf(&cp.args, "--threads=%d", cl_args.nr_threads); - for (;;) { - pid_seen = waitpid(pid_child, &status, WNOHANG); + cp.no_stdin = 1; + cp.no_stdout = 1; + cp.no_stderr = 1; - if (pid_seen == -1) - return error_errno(_("waitpid failed")); + sbgr = start_bg_command(&cp, bg_wait_cb, NULL, cl_args.max_wait_sec); - else if (pid_seen == 0) { - /* - * The child is still running (this should be - * the normal case). Try to connect to it on - * the socket and see if it is ready for - * business. - * - * If there is another daemon already running, - * our child will fail to start (possibly - * after a timeout on the lock), but we don't - * care (who responds) if the socket is live. - */ - s = ipc_get_active_state(cl_args.path); - if (s == IPC_STATE__LISTENING) - return 0; - - time(&now); - if (now > time_limit) - return error(_("daemon not online yet")); - - continue; - } + switch (sbgr) { + case SBGR_READY: + return 0; - else if (pid_seen == pid_child) { - /* - * The new child daemon process shutdown while - * it was starting up, so it is not listening - * on the socket. - * - * Try to ping the socket in the odd chance - * that another daemon started (or was already - * running) while our child was starting. - * - * Again, we don't care who services the socket. - */ - s = ipc_get_active_state(cl_args.path); - if (s == IPC_STATE__LISTENING) - return 0; + default: + case SBGR_ERROR: + case SBGR_CB_ERROR: + return error("daemon failed to start"); - /* - * We don't care about the WEXITSTATUS() nor - * any of the WIF*(status) values because - * `cmd__simple_ipc()` does the `!!result` - * trick on all function return values. - * - * So it is sufficient to just report the - * early shutdown as an error. - */ - return error(_("daemon failed to start")); - } + case SBGR_TIMEOUT: + return error("daemon not online yet"); - else - return error(_("waitpid is confused")); + case SBGR_DIED: + return error("daemon terminated"); } } -/* - * This process will start a simple-ipc server in a background process and - * wait for it to become ready. This is like `daemonize()` but gives us - * more control and better error reporting (and makes it easier to write - * unit tests). - */ -static int daemon__start_server(void) -{ - pid_t pid_child; - int ret; - - /* - * Run the actual daemon in a background process. - */ - ret = spawn_server(&pid_child); - if (pid_child <= 0) - return ret; - - /* - * Let the parent wait for the child process to get started - * and begin listening for requests on the socket. - */ - ret = wait_for_server_startup(pid_child); - - return ret; -} - /* * This process will run a quick probe to see if a simple-ipc server * is active on this path.