From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Wed, 06 Aug 2025 15:16:41 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1uje0X-007ePp-2C for lore@lore.pengutronix.de; Wed, 06 Aug 2025 15:16:41 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1uje0X-0006mL-4N for lore@pengutronix.de; Wed, 06 Aug 2025 15:16:41 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=Kq+5RXZGPSMtBPEk8J0Fz2bjSAkwAbTUgCJOHVGnwtw=; b=TBhSabcuyXXgt2yNuLWVqH2jfN UDbeu7B2knDLRSbHU+5hd4e3T15cNhs0PSYygSr0m25gVw2PdO8QI3g3KvDR5gt+Ni1ntI/3yxjK/ qAxlNFH6fThYaAIkiaFbxXVfVGoziyiCcp35vbyZpe0yGyqmWXx1fcCghcohkuyXx6FmgxKIihJkd F8QSKfpzp2eYy9UloLYHf11vDdH4dh//+cdBmU8ZEm/NQawX4HcWWt/xhHTtnpBVls9vXxEFiWPHy zCG0ridfSNDOrpGhmBv+mbCEPNO3GB4dvdaDbKiuRToTIxYBs8rbqFNRJW6OPCriWkjTZ47NHKgBh pGY0MOgw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uje09-0000000FHLA-1duZ; Wed, 06 Aug 2025 13:16:17 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uje07-0000000FHKl-2YLy for barebox@lists.infradead.org; Wed, 06 Aug 2025 13:16:16 +0000 Received: from ptz.office.stw.pengutronix.de ([2a0a:edc0:0:900:1d::77] helo=geraet.fritz.box) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1uje05-0006hr-QV; Wed, 06 Aug 2025 15:16:13 +0200 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum Date: Wed, 6 Aug 2025 15:16:12 +0200 Message-Id: <20250806131612.2823451-1-a.fatoum@barebox.org> X-Mailer: git-send-email 2.39.5 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250806_061615_646895_006E56BE X-CRM114-Status: GOOD ( 10.35 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.5 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH] hush: implement PROMPT_COMMAND X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) This allows dynamically updating the prompt to reflect new contextual or global information (e.g. which security mode barebox is in). Signed-off-by: Ahmad Fatoum --- common/Kconfig | 1 + common/hush.c | 12 +++++++++++- 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/common/Kconfig b/common/Kconfig index b2449207eff9..1d9570ef67b5 100644 --- a/common/Kconfig +++ b/common/Kconfig @@ -515,6 +515,7 @@ config HUSH_FANCY_PROMPT help Allow to set PS1 from the command line. PS1 can have several escaped commands like \h for the 'model' string or \w for the current working directory. + PS1 can be set statically or computed on demand by executing PROMPT_COMMAND. config CMDLINE_EDITING depends on !SHELL_NONE diff --git a/common/hush.c b/common/hush.c index 086cbc68b891..552e7327de92 100644 --- a/common/hush.c +++ b/common/hush.c @@ -426,8 +426,17 @@ static char *getprompt(void) static char prompt[PATH_MAX + 32]; #ifdef CONFIG_HUSH_FANCY_PROMPT - const char *ps1 = getenv("PS1"); + const char *ps1, *prompt_command; + struct p_context ctx = {}; + prompt_command = getenv("PROMPT_COMMAND"); + if (prompt_command) { + initialize_context(&ctx); + parse_string_outer(&ctx, prompt_command, FLAG_PARSE_SEMICOLON); + release_context(&ctx); + } + + ps1 = getenv("PS1"); if (ps1) process_escape_sequence(ps1, prompt, PATH_MAX + 32); else @@ -2065,6 +2074,7 @@ BAREBOX_CMD_END BAREBOX_MAGICVAR(PATH, "colon separated list of paths to search for executables"); #ifdef CONFIG_HUSH_FANCY_PROMPT BAREBOX_MAGICVAR(PS1, "hush prompt"); +BAREBOX_MAGICVAR(PROMPT_COMMAND, "command to execute prior to each primary prompt"); #endif static int binfmt_sh_excute(struct binfmt_hook *b, char *file, int argc, char **argv) -- 2.39.5