1 /* 2 * (C) Copyright 2000-2003 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 Processor Table 26 */ 27 28 #include <common.h> 29 #include <command.h> 30 31 int 32 do_version (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) 33 { 34 extern char version_string[]; 35 printf ("\n%s\n", version_string); 36 return 0; 37 } 38 39 cmd_tbl_t U_BOOT_CMD(VERS) = MK_CMD_ENTRY( 40 "version", 1, 1, do_version, 41 "version - print monitor version\n", 42 NULL 43 ); 44 45 int 46 do_echo (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) 47 { 48 int i, putnl = 1; 49 50 for (i = 1; i < argc; i++) { 51 char *p = argv[i], c; 52 53 if (i > 1) 54 putc(' '); 55 while ((c = *p++) != '\0') { 56 if (c == '\\' && *p == 'c') { 57 putnl = 0; 58 p++; 59 } else { 60 putc(c); 61 } 62 } 63 } 64 65 if (putnl) 66 putc('\n'); 67 return 0; 68 } 69 70 cmd_tbl_t U_BOOT_CMD(ECHO) = MK_CMD_ENTRY( 71 "echo", CFG_MAXARGS, 1, do_echo, 72 "echo - echo args to console\n", 73 "[args..]\n" 74 " - echo args to console; \\c suppresses newline\n" 75 ); 76 77 /* 78 * Use puts() instead of printf() to avoid printf buffer overflow 79 * for long help messages 80 */ 81 int do_help (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) 82 { 83 int i; 84 int rcode = 0; 85 86 if (argc == 1) { /*show list of commands */ 87 88 int cmd_items = &__u_boot_cmd_end - 89 &__u_boot_cmd_start; /* pointer arith! */ 90 cmd_tbl_t *cmd_array[cmd_items]; 91 int i, j, swaps; 92 93 /* Make array of commands from .uboot_cmd section */ 94 cmdtp = &__u_boot_cmd_start; 95 for (i = 0; i < cmd_items; i++) { 96 cmd_array[i] = cmdtp++; 97 } 98 99 /* Sort command list (trivial bubble sort) */ 100 for (i = cmd_items - 1; i > 0; --i) { 101 swaps = 0; 102 for (j = 0; j < i; ++j) { 103 if (strcmp (cmd_array[j]->name, 104 cmd_array[j + 1]->name) > 0) { 105 cmd_tbl_t *tmp; 106 tmp = cmd_array[j]; 107 cmd_array[j] = cmd_array[j + 1]; 108 cmd_array[j + 1] = tmp; 109 ++swaps; 110 } 111 } 112 if (!swaps) 113 break; 114 } 115 116 /* print short help (usage) */ 117 for (i = 0; i < cmd_items; i++) { 118 const char *usage = cmd_array[i]->usage; 119 120 /* allow user abort */ 121 if (ctrlc ()) 122 return 1; 123 if (usage == NULL) 124 continue; 125 puts (usage); 126 } 127 return 0; 128 } 129 /* 130 * command help (long version) 131 */ 132 for (i = 1; i < argc; ++i) { 133 if ((cmdtp = find_cmd (argv[i])) != NULL) { 134 #ifdef CFG_LONGHELP 135 /* found - print (long) help info */ 136 puts (cmdtp->name); 137 putc (' '); 138 if (cmdtp->help) { 139 puts (cmdtp->help); 140 } else { 141 puts ("- No help available.\n"); 142 rcode = 1; 143 } 144 putc ('\n'); 145 #else /* no long help available */ 146 if (cmdtp->usage) 147 puts (cmdtp->usage); 148 #endif /* CFG_LONGHELP */ 149 } else { 150 printf ("Unknown command '%s' - try 'help'" 151 " without arguments for list of all" 152 " known commands\n\n", argv[i] 153 ); 154 rcode = 1; 155 } 156 } 157 return rcode; 158 } 159 160 161 cmd_tbl_t U_BOOT_CMD(HELP) = MK_CMD_ENTRY( 162 "help", CFG_MAXARGS, 1, do_help, 163 "help - print online help\n", 164 "[command ...]\n" 165 " - show help information (for 'command')\n" 166 "'help' prints online help for the monitor commands.\n\n" 167 "Without arguments, it prints a short usage message for all commands.\n\n" 168 "To get detailed help information for specific commands you can type\n" 169 "'help' with one or more command names as arguments.\n" 170 ); 171 172 cmd_tbl_t U_BOOT_CMD(QUES) = MK_CMD_ENTRY( 173 "?", CFG_MAXARGS, 1, do_help, 174 "? - alias for 'help'\n", 175 NULL 176 ); 177 178 /*************************************************************************** 179 * find command table entry for a command 180 */ 181 cmd_tbl_t *find_cmd (const char *cmd) 182 { 183 cmd_tbl_t *cmdtp; 184 cmd_tbl_t *cmdtp_temp = &__u_boot_cmd_start; /*Init value */ 185 const char *p; 186 int len; 187 int n_found = 0; 188 189 /* 190 * Some commands allow length modifiers (like "cp.b"); 191 * compare command name only until first dot. 192 */ 193 len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd); 194 195 for (cmdtp = &__u_boot_cmd_start; 196 cmdtp != &__u_boot_cmd_end; 197 cmdtp++) { 198 if (strncmp (cmd, cmdtp->name, len) == 0) { 199 if (len == strlen (cmdtp->name)) 200 return cmdtp; /* full match */ 201 202 cmdtp_temp = cmdtp; /* abbreviated command ? */ 203 n_found++; 204 } 205 } 206 if (n_found == 1) { /* exactly one match */ 207 return cmdtp_temp; 208 } 209 210 return NULL; /* not found or ambiguous command */ 211 } 212