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 phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EEFC9C6FD1D for ; Thu, 30 Mar 2023 19:58:10 +0000 (UTC) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id B46A486144; Thu, 30 Mar 2023 21:54:49 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=amarulasolutions.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Authentication-Results: phobos.denx.de; dkim=pass (1024-bit key; unprotected) header.d=amarulasolutions.com header.i=@amarulasolutions.com header.b="G3lQW7k7"; dkim-atps=neutral Received: by phobos.denx.de (Postfix, from userid 109) id BD6B485EFD; Thu, 30 Mar 2023 21:52:47 +0200 (CEST) Received: from mail-wm1-x32b.google.com (mail-wm1-x32b.google.com [IPv6:2a00:1450:4864:20::32b]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id 438CE860CB for ; Thu, 30 Mar 2023 21:49:29 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=amarulasolutions.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=francis.laniel@amarulasolutions.com Received: by mail-wm1-x32b.google.com with SMTP id r19-20020a05600c459300b003eb3e2a5e7bso12548820wmo.0 for ; Thu, 30 Mar 2023 12:49:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amarulasolutions.com; s=google; t=1680205768; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=gv3JWwSbnb0G/ArlmTGV7a5vOPAwcVmescNy9DnCW9M=; b=G3lQW7k7cmjWjLbRs8sQrsjRTwH86lL0wLKgyVC/ZSeiNuGu1OHd+NW4qcq4zHcQuy 6V4nsTRJj/P6MMmJkH4gPW223rqcCkCLZNF1ku7umUP4ld8hScHu36RNY8Q7PRx17Aoz E4iguTrF83DCmkjUtKMA1XXNjyO0Vy1VrczUY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680205768; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=gv3JWwSbnb0G/ArlmTGV7a5vOPAwcVmescNy9DnCW9M=; b=MJmYvfGSfUUC7EuZtt6CaG5EJSYlWDM1txd2dCm9J2zWsaA2GBSg3l0XxDGP1ICTJ2 7MJftA2iWiliKT9dM7EwFSk8JPxsfMjoK8UuGxs/Mc4xVyMOZ9nRy4W0jRjvb76YX0UV i6rrlpQvh/HmvucQj7IqFz/ZQakAYqpDnbN9Mc9tx0KlROURqKEBHw/vRxJsDQNJH8ZF 1ZKaXZ006PP4qfjR2sBkZetJ1hvy9mUy5hvdxivSYQRQlXaohcuwjEmAmymxyNSRbD1S nhjRjNdelAwMxxE/Ec5vvXFvWC0rwo6i8RioICxs+fFBgSaRz7rMrWTeTtcEbzJKJoCb elBw== X-Gm-Message-State: AAQBX9fP9p+CJupxse/D8+76MhwoosNeDvMcGwkZrxabCc4LgCfYdTPg oQSolknU/o7oRxYURdSPruZOnDtKXav9W6lpFtTToQ== X-Google-Smtp-Source: AKy350YF0ETeXO/dLtn44LKlZ2KftwJZfiqbv/EpZiL+F2X1GygMEa+uSGIzAYdoqjDkVNiEhwLwIQ== X-Received: by 2002:a7b:ce84:0:b0:3ef:6fee:803a with SMTP id q4-20020a7bce84000000b003ef6fee803amr10653484wmj.35.1680205768763; Thu, 30 Mar 2023 12:49:28 -0700 (PDT) Received: from pwmachine.numericable.fr ([78.30.11.60]) by smtp.gmail.com with ESMTPSA id l24-20020a1c7918000000b003e203681b26sm203762wme.29.2023.03.30.12.49.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Mar 2023 12:49:28 -0700 (PDT) From: Francis Laniel To: u-boot@lists.denx.de Cc: Michael Nazzareno Trimarchi , Tom Rini , Simon Glass , Harald Seiler , Francis Laniel , "Albert ARIBAUD (3ADEV)" , Tony Dinh , Sergei Antonov , Ilias Apalodimas , Heinrich Schuchardt , Masahisa Kojima , =?UTF-8?q?Pali=20Roh=C3=A1r?= , Stefan Roese , John Keeping , Neil Armstrong , Roger Knecht , Linus Walleij , Alexey Romanov , Patrice Chotard , Patrick Delaunay , Fabrice Gasnier , Marek Vasut , Hector Palacios , Rasmus Villemoes , AKASHI Takahiro , Rui Miguel Silva , Andrew Scull Subject: [RFC PATCH v7 13/23] cli: hush_2021: Enable variables expansion for hush 2021 Date: Thu, 30 Mar 2023 20:47:01 +0100 Message-Id: <20230330194716.23623-14-francis.laniel@amarulasolutions.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230330194716.23623-1-francis.laniel@amarulasolutions.com> References: <20230330194716.23623-1-francis.laniel@amarulasolutions.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean Enables variables expansion for hush 2021, both for local and environment variables. So the following commands: foo=bar echo $foo setenv bar foo echo $bar leads to "bar" and "foo" being printed on console output. Signed-off-by: Francis Laniel Reviewed-by: Simon Glass --- common/cli_hush_2021.c | 17 +++++++ common/cli_hush_upstream.c | 91 +++++++++++++++++++++++++++++++++++--- 2 files changed, 103 insertions(+), 5 deletions(-) diff --git a/common/cli_hush_2021.c b/common/cli_hush_2021.c index 653ea52929..7dd30ea0ef 100644 --- a/common/cli_hush_2021.c +++ b/common/cli_hush_2021.c @@ -207,6 +207,23 @@ static const char* endofname(const char *name) return name; } +/** + * list_size() - returns the number of elements in char ** before NULL. + * + * Argument must contain NULL to signalize its end. + * + * @list The list to count the number of element. + * @return The number of element in list. + */ +static size_t list_size(char **list) +{ + size_t size; + + for (size = 0; list[size] != NULL; size++); + + return size; +} + struct in_str; static int u_boot_cli_readline(struct in_str *i); diff --git a/common/cli_hush_upstream.c b/common/cli_hush_upstream.c index 84227a248e..b806c5c653 100644 --- a/common/cli_hush_upstream.c +++ b/common/cli_hush_upstream.c @@ -3486,7 +3486,6 @@ static int o_get_last_ptr(o_string *o, int n) return ((int)(uintptr_t)list[n-1]) + string_start; } -#ifndef __U_BOOT__ /* * Globbing routines. * @@ -3741,8 +3740,10 @@ static int glob_needed(const char *s) */ static int perform_glob(o_string *o, int n) { +#ifndef __U_BOOT__ glob_t globdata; int gr; +#endif /* __U_BOOT__ */ char *pattern; debug_printf_glob("start perform_glob: n:%d o->data:%p\n", n, o->data); @@ -3751,13 +3752,16 @@ static int perform_glob(o_string *o, int n) pattern = o->data + o_get_last_ptr(o, n); debug_printf_glob("glob pattern '%s'\n", pattern); if (!glob_needed(pattern)) { +#ifndef __U_BOOT__ literal: +#endif /* __U_BOOT__ */ /* unbackslash last string in o in place, fix length */ o->length = unbackslash(pattern) - o->data; debug_printf_glob("glob pattern '%s' is literal\n", pattern); return o_save_ptr_helper(o, n); } +#ifndef __U_BOOT__ memset(&globdata, 0, sizeof(globdata)); /* Can't use GLOB_NOCHECK: it does not unescape the string. * If we glob "*.\*" and don't find anything, we need @@ -3793,16 +3797,22 @@ static int perform_glob(o_string *o, int n) if (DEBUG_GLOB) debug_print_list("perform_glob returning", o, n); return n; +#else /* __U_BOOT__ */ + /* + * NOTE We only use perform glob to call unbackslash to remove backslash + * from string once expanded. + * So, it seems OK to return this if no previous return was done. + */ + return o_save_ptr_helper(o, n); +#endif /* __U_BOOT__ */ } -#endif /* !__U_BOOT__ */ #endif /* !HUSH_BRACE_EXPANSION */ /* If o->o_expflags & EXP_FLAG_GLOB, glob the string so far remembered. * Otherwise, just finish current list[] and start new */ static int o_save_ptr(o_string *o, int n) { -#ifndef __U_BOOT__ if (o->o_expflags & EXP_FLAG_GLOB) { /* If o->has_empty_slot, list[n] was already globbed * (if it was requested back then when it was filled) @@ -3810,7 +3820,6 @@ static int o_save_ptr(o_string *o, int n) if (!o->has_empty_slot) return perform_glob(o, n); /* o_save_ptr_helper is inside */ } -#endif /* !__U_BOOT__ */ return o_save_ptr_helper(o, n); } @@ -5456,7 +5465,20 @@ static int parse_dollar(o_string *as_string, nommu_addchr(as_string, ch); if (ch == '}') break; +#ifndef __U_BOOT__ if (!isalnum(ch) && ch != '_') { +#else /* __U_BOOT__ */ + /* + * In several places in U-Boot, we use variable like + * foo# (e.g. serial#), particularly in env. + * So, we need to authorize # to appear inside + * variable name and then expand this variable. + * NOTE Having # in variable name is not permitted in + * upstream hush but expansion will be done (even though + * the result will be empty). + */ + if (!isalnum(ch) && ch != '_' && ch != '#') { +#endif /* __U_BOOT__ */ unsigned end_ch; #ifndef __U_BOOT__ unsigned char last_ch; @@ -7031,7 +7053,20 @@ static NOINLINE int expand_one_var(o_string *output, int n, } #endif /* !__U_BOOT__ */ default: +#ifndef __U_BOOT__ val = get_local_var_value(var); +#else /* __U_BOOT__ */ + /* + * Environment variable set with setenv* have to be + * expanded. + * So, we first search if the variable exists in + * environment, if this is not the case, we default to + * local value. + */ + val = env_get(var); + if (!val) + val = get_local_var_value(var); +#endif /* __U_BOOT__ */ } } @@ -7376,7 +7411,11 @@ static NOINLINE int expand_vars_to_list(o_string *output, int n, char *arg) case '*': case '@': { int i; +#ifndef __U_BOOT__ if (!G.global_argv[1]) +#else /* __U_BOOT__ */ + if (!G.global_argv || !G.global_argv[1]) +#endif /* __U_BOOT__ */ break; i = 1; cant_be_null |= first_ch; /* do it for "$@" _now_, when we know it's not empty */ @@ -9977,7 +10016,30 @@ static NOINLINE int run_pipe(struct pipe *pi) #endif /* !__U_BOOT__ */ command = &pi->cmds[cmd_no]; cmd_no++; - if (command->argv) { + +#ifdef __U_BOOT__ + /* Replace argv and argc by expanded if it exists. */ + if (argv_expanded) { + /* + * We need to save a pointer to argv, we will restore it + * later, so it will be freed when pipe is freed. + */ + argv = command->argv; + + /* + * After expansion, there can be more or less argument, so we need to + * update argc, for example: + * - More arguments: + * foo='bar quuz' + * echo $foo + * - Less arguments: + * echo $foo (if foo was never set) + */ + command->argc = list_size(argv_expanded); + command->argv = argv_expanded; + } +#endif /* __U_BOOT__ */ + if (command->argv) { debug_printf_exec(": pipe member '%s' '%s'...\n", command->argv[0], command->argv[1]); } else { @@ -10092,6 +10154,25 @@ static NOINLINE int run_pipe(struct pipe *pi) rcode = cmd_process(G.do_repeat ? CMD_FLAG_REPEAT : 0, command->argc, command->argv, &(G.flag_repeat), NULL); + + if (argv_expanded) { + /* + * expand_strvec_to_strvec() allocates memory to expand + * argv, we need to free it. + */ + free(argv_expanded); + + /* + * We also restore command->argv to its original value + * so no memory leak happens. + */ + command->argv = argv; + + /* + * NOTE argc exists only in U-Boot, so argv freeing does + * not rely on it as this code exists in BusyBox. + */ + } #endif /* __U_BOOT__ */ } -- 2.34.1