1 /* 2 * (C) Copyright 2000-2008 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 /* 25 * Command line user interface to firmware (=U-Boot) environment. 26 * 27 * Implements: 28 * fw_printenv [[ -n name ] | [ name ... ]] 29 * - prints the value of a single environment variable 30 * "name", the ``name=value'' pairs of one or more 31 * environment variables "name", or the whole 32 * environment if no names are specified. 33 * fw_setenv name [ value ... ] 34 * - If a name without any values is given, the variable 35 * with this name is deleted from the environment; 36 * otherwise, all "value" arguments are concatenated, 37 * separated by single blank characters, and the 38 * resulting string is assigned to the environment 39 * variable "name" 40 */ 41 42 #include <stdio.h> 43 #include <string.h> 44 #include <stdlib.h> 45 #include <getopt.h> 46 #include "fw_env.h" 47 48 #define CMD_PRINTENV "fw_printenv" 49 #define CMD_SETENV "fw_setenv" 50 51 static struct option long_options[] = { 52 {"script", required_argument, NULL, 's'}, 53 {"help", no_argument, NULL, 'h'}, 54 {NULL, 0, NULL, 0} 55 }; 56 57 void usage(void) 58 { 59 60 fprintf(stderr, "fw_printenv/fw_setenv, " 61 "a command line interface to U-Boot environment\n\n" 62 "usage:\tfw_printenv [-n] [variable name]\n" 63 "\tfw_setenv [variable name] [variable value]\n" 64 "\tfw_setenv -s [ file ]\n" 65 "\tfw_setenv -s - < [ file ]\n\n" 66 "The file passed as argument contains only pairs " 67 "name / value\n" 68 "Example:\n" 69 "# Any line starting with # is treated as comment\n" 70 "\n" 71 "\t netdev eth0\n" 72 "\t kernel_addr 400000\n" 73 "\t var1\n" 74 "\t var2 The quick brown fox jumps over the " 75 "lazy dog\n" 76 "\n" 77 "A variable without value will be dropped. It is possible\n" 78 "to put any number of spaces between the fields, but any\n" 79 "space inside the value is treated as part of the value " 80 "itself.\n\n" 81 ); 82 } 83 84 int 85 main(int argc, char *argv[]) 86 { 87 char *p; 88 char *cmdname = *argv; 89 char *script_file = NULL; 90 int c; 91 92 if ((p = strrchr (cmdname, '/')) != NULL) { 93 cmdname = p + 1; 94 } 95 96 while ((c = getopt_long (argc, argv, "ns:h", 97 long_options, NULL)) != EOF) { 98 switch (c) { 99 case 'n': 100 /* handled in fw_printenv */ 101 break; 102 case 's': 103 script_file = optarg; 104 break; 105 case 'h': 106 usage(); 107 return EXIT_SUCCESS; 108 default: /* '?' */ 109 fprintf(stderr, "Try `%s --help' for more information." 110 "\n", cmdname); 111 return EXIT_FAILURE; 112 } 113 } 114 115 116 if (strcmp(cmdname, CMD_PRINTENV) == 0) { 117 118 if (fw_printenv (argc, argv) != 0) 119 return EXIT_FAILURE; 120 121 return EXIT_SUCCESS; 122 123 } else if (strcmp(cmdname, CMD_SETENV) == 0) { 124 if (!script_file) { 125 if (fw_setenv(argc, argv) != 0) 126 return EXIT_FAILURE; 127 } else { 128 if (fw_parse_script(script_file) != 0) 129 return EXIT_FAILURE; 130 } 131 132 return EXIT_SUCCESS; 133 134 } 135 136 fprintf (stderr, 137 "Identity crisis - may be called as `" CMD_PRINTENV 138 "' or as `" CMD_SETENV "' but not as `%s'\n", 139 cmdname); 140 return EXIT_FAILURE; 141 } 142