X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=tools%2Fenv%2Ffw_env_main.c;h=1d193bd437d83ddfd78508765959f1c4561923c7;hb=caad316b3165615f1a4848901811a4a084444c9d;hp=82116b4b2917d1dfb796e7c6f98e8ff95301eccd;hpb=2271d3ddccfbd4a7640121669ff9b013b1fea361;p=oweals%2Fu-boot.git diff --git a/tools/env/fw_env_main.c b/tools/env/fw_env_main.c index 82116b4b29..1d193bd437 100644 --- a/tools/env/fw_env_main.c +++ b/tools/env/fw_env_main.c @@ -1,134 +1,284 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * (C) Copyright 2000-2008 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA */ /* * Command line user interface to firmware (=U-Boot) environment. * * Implements: - * fw_printenv [[ -n name ] | [ name ... ]] + * fw_printenv [ -a key ] [[ -n name ] | [ name ... ]] * - prints the value of a single environment variable * "name", the ``name=value'' pairs of one or more * environment variables "name", or the whole * environment if no names are specified. - * fw_setenv name [ value ... ] + * fw_setenv [ -a key ] name [ value ... ] * - If a name without any values is given, the variable * with this name is deleted from the environment; * otherwise, all "value" arguments are concatenated, * separated by single blank characters, and the * resulting string is assigned to the environment * variable "name" + * + * If '-a key' is specified, the env block is encrypted with AES 128 CBC. + * The 'key' argument is in the format of 32 hexadecimal numbers (16 bytes + * of AES key), eg. '-a aabbccddeeff00112233445566778899'. */ +#include +#include +#include #include #include #include -#include +#include +#include +#include +#include "fw_env_private.h" #include "fw_env.h" -#define CMD_PRINTENV "fw_printenv" +#define CMD_PRINTENV "fw_printenv" #define CMD_SETENV "fw_setenv" +static int do_printenv; static struct option long_options[] = { - {"script", required_argument, NULL, 's'}, + {"config", required_argument, NULL, 'c'}, {"help", no_argument, NULL, 'h'}, + {"script", required_argument, NULL, 's'}, + {"noheader", no_argument, NULL, 'n'}, + {"lock", required_argument, NULL, 'l'}, + {"version", no_argument, NULL, 'v'}, {NULL, 0, NULL, 0} }; -void usage(void) +static struct env_opts env_opts; + +/* setenv options */ +static int noheader; + +/* getenv options */ +static char *script_file; + +void usage_printenv(void) { - fprintf(stderr, "fw_printenv/fw_setenv, " - "a command line interface to U-Boot environment\n\n" - "usage:\tfw_printenv\n" - "\tfw_setenv [variable name] [variable value]\n" - "\tfw_setenv -s [ file ]\n" - "\tfw_setenv -s - < [ file ]\n\n" - "The file passed as argument contains only pairs " - "name / value\n" - "Example:\n" - "# Any line starting with # is treated as comment\n" + fprintf(stderr, + "Usage: fw_printenv [OPTIONS]... [VARIABLE]...\n" + "Print variables from U-Boot environment\n" + "\n" + " -h, --help print this help.\n" + " -v, --version display version\n" +#ifdef CONFIG_FILE + " -c, --config configuration file, default:" CONFIG_FILE "\n" +#endif + " -n, --noheader do not repeat variable name in output\n" + " -l, --lock lock node, default:/var/lock\n" + "\n"); +} + +void usage_env_set(void) +{ + fprintf(stderr, + "Usage: fw_setenv [OPTIONS]... [VARIABLE]...\n" + "Modify variables in U-Boot environment\n" + "\n" + " -h, --help print this help.\n" + " -v, --version display version\n" +#ifdef CONFIG_FILE + " -c, --config configuration file, default:" CONFIG_FILE "\n" +#endif + " -l, --lock lock node, default:/var/lock\n" + " -s, --script batch mode to minimize writes\n" "\n" - "\t netdev eth0\n" - "\t kernel_addr 400000\n" - "\t var1\n" - "\t var2 The quick brown fox jumps over the " - "lazy dog\n" + "Examples:\n" + " fw_setenv foo bar set variable foo equal bar\n" + " fw_setenv foo clear variable foo\n" + " fw_setenv --script file run batch script\n" "\n" - "A variable without value will be dropped. It is possible\n" - "to put any number of spaces between the fields, but any\n" - "space inside the value is treated as part of the value " - "itself.\n\n" - ); + "Script Syntax:\n" + " key [space] value\n" + " lines starting with '#' are treated as comment\n" + "\n" + " A variable without value will be deleted. Any number of spaces are\n" + " allowed between key and value. Space inside of the value is treated\n" + " as part of the value itself.\n" + "\n" + "Script Example:\n" + " netdev eth0\n" + " kernel_addr 400000\n" + " foo empty empty empty empty empty empty\n" + " bar\n" + "\n"); } -int -main(int argc, char *argv[]) +static void parse_common_args(int argc, char *argv[]) { - char *p; - char *cmdname = *argv; - char *script_file = NULL; int c; - if ((p = strrchr (cmdname, '/')) != NULL) { - cmdname = p + 1; +#ifdef CONFIG_FILE + env_opts.config_file = CONFIG_FILE; +#endif + + while ((c = getopt_long(argc, argv, ":a:c:l:h:v", long_options, NULL)) != + EOF) { + switch (c) { +#ifdef CONFIG_FILE + case 'c': + env_opts.config_file = optarg; + break; +#endif + case 'l': + env_opts.lockname = optarg; + break; + case 'h': + do_printenv ? usage_printenv() : usage_env_set(); + exit(EXIT_SUCCESS); + break; + case 'v': + fprintf(stderr, "Compiled with " U_BOOT_VERSION "\n"); + exit(EXIT_SUCCESS); + break; + default: + /* ignore unknown options */ + break; + } } - while ((c = getopt_long (argc, argv, "s:h", - long_options, NULL)) != EOF) { + /* Reset getopt for the next pass. */ + opterr = 1; + optind = 1; +} + +int parse_printenv_args(int argc, char *argv[]) +{ + int c; + + parse_common_args(argc, argv); + + while ((c = getopt_long(argc, argv, "a:c:ns:l:h:v", long_options, NULL)) + != EOF) { + switch (c) { + case 'n': + noheader = 1; + break; + case 'a': + case 'c': + case 'h': + case 'l': + /* ignore common options */ + break; + default: /* '?' */ + usage_printenv(); + exit(EXIT_FAILURE); + break; + } + } + return 0; +} + +int parse_setenv_args(int argc, char *argv[]) +{ + int c; + + parse_common_args(argc, argv); + + while ((c = getopt_long(argc, argv, "a:c:ns:l:h:v", long_options, NULL)) + != EOF) { switch (c) { case 's': script_file = optarg; break; + case 'a': + case 'c': case 'h': - usage(); - return EXIT_SUCCESS; + case 'l': + /* ignore common options */ + break; + default: /* '?' */ + usage_env_set(); + exit(EXIT_FAILURE); + break; } } + return 0; +} + +int main(int argc, char *argv[]) +{ + char *lockname = "/var/lock/" CMD_PRINTENV ".lock"; + int lockfd = -1; + int retval = EXIT_SUCCESS; + char *_cmdname; + _cmdname = *argv; + if (strrchr(_cmdname, '/') != NULL) + _cmdname = strrchr(_cmdname, '/') + 1; - if (strcmp(cmdname, CMD_PRINTENV) == 0) { + if (strcmp(_cmdname, CMD_PRINTENV) == 0) { + do_printenv = 1; + } else if (strcmp(_cmdname, CMD_SETENV) == 0) { + do_printenv = 0; + } else { + fprintf(stderr, + "Identity crisis - may be called as `%s' or as `%s' but not as `%s'\n", + CMD_PRINTENV, CMD_SETENV, _cmdname); + exit(EXIT_FAILURE); + } - if (fw_printenv (argc, argv) != 0) - return EXIT_FAILURE; + if (do_printenv) { + if (parse_printenv_args(argc, argv)) + exit(EXIT_FAILURE); + } else { + if (parse_setenv_args(argc, argv)) + exit(EXIT_FAILURE); + } - return EXIT_SUCCESS; + /* shift parsed flags, jump to non-option arguments */ + argc -= optind; + argv += optind; - } else if (strcmp(cmdname, CMD_SETENV) == 0) { - if (!script_file) { - if (fw_setenv(argc, argv) != 0) - return EXIT_FAILURE; - } else { - if (fw_parse_script(script_file) != 0) - return EXIT_FAILURE; + if (env_opts.lockname) { + lockname = malloc(strlen(env_opts.lockname) + + sizeof(CMD_PRINTENV) + 10); + if (!lockname) { + fprintf(stderr, "Unable allocate memory"); + exit(EXIT_FAILURE); } - return EXIT_SUCCESS; + sprintf(lockname, "%s/%s.lock", + env_opts.lockname, CMD_PRINTENV); + } + + lockfd = open(lockname, O_WRONLY | O_CREAT | O_TRUNC, 0666); + if (-1 == lockfd) { + fprintf(stderr, "Error opening lock file %s\n", lockname); + return EXIT_FAILURE; + } + + if (-1 == flock(lockfd, LOCK_EX)) { + fprintf(stderr, "Error locking file %s\n", lockname); + close(lockfd); + return EXIT_FAILURE; + } + if (do_printenv) { + if (fw_printenv(argc, argv, noheader, &env_opts) != 0) + retval = EXIT_FAILURE; + } else { + if (!script_file) { + if (fw_env_set(argc, argv, &env_opts) != 0) + retval = EXIT_FAILURE; + } else { + if (fw_parse_script(script_file, &env_opts) != 0) + retval = EXIT_FAILURE; + } } - fprintf (stderr, - "Identity crisis - may be called as `" CMD_PRINTENV - "' or as `" CMD_SETENV "' but not as `%s'\n", - cmdname); - return EXIT_FAILURE; + if (env_opts.lockname) + free(lockname); + + flock(lockfd, LOCK_UN); + close(lockfd); + return retval; }