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 int 40 do_echo (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) 41 { 42 int i, putnl = 1; 43 44 for (i = 1; i < argc; i++) { 45 char *p = argv[i], c; 46 47 if (i > 1) 48 putc(' '); 49 while ((c = *p++) != '\0') { 50 if (c == '\\' && *p == 'c') { 51 putnl = 0; 52 p++; 53 } else { 54 putc(c); 55 } 56 } 57 } 58 59 if (putnl) 60 putc('\n'); 61 return 0; 62 } 63 64 /* 65 * Use puts() instead of printf() to avoid printf buffer overflow 66 * for long help messages 67 */ 68 int do_help (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) 69 { 70 int i; 71 int rcode = 0; 72 73 if (argc == 1) { /*show list of commands */ 74 75 int cmd_items = &__u_boot_cmd_end - 76 &__u_boot_cmd_start; /* pointer arith! */ 77 cmd_tbl_t *cmd_array[cmd_items]; 78 int i, j, swaps; 79 80 /* Make array of commands from .uboot_cmd section */ 81 cmdtp = &__u_boot_cmd_start; 82 for (i = 0; i < cmd_items; i++) { 83 cmd_array[i] = cmdtp++; 84 } 85 86 /* Sort command list (trivial bubble sort) */ 87 for (i = cmd_items - 1; i > 0; --i) { 88 swaps = 0; 89 for (j = 0; j < i; ++j) { 90 if (strcmp (cmd_array[j]->name, 91 cmd_array[j + 1]->name) > 0) { 92 cmd_tbl_t *tmp; 93 tmp = cmd_array[j]; 94 cmd_array[j] = cmd_array[j + 1]; 95 cmd_array[j + 1] = tmp; 96 ++swaps; 97 } 98 } 99 if (!swaps) 100 break; 101 } 102 103 /* print short help (usage) */ 104 for (i = 0; i < cmd_items; i++) { 105 const char *usage = cmd_array[i]->usage; 106 107 /* allow user abort */ 108 if (ctrlc ()) 109 return 1; 110 if (usage == NULL) 111 continue; 112 puts (usage); 113 } 114 return 0; 115 } 116 /* 117 * command help (long version) 118 */ 119 for (i = 1; i < argc; ++i) { 120 if ((cmdtp = find_cmd (argv[i])) != NULL) { 121 #ifdef CFG_LONGHELP 122 /* found - print (long) help info */ 123 puts (cmdtp->name); 124 putc (' '); 125 if (cmdtp->help) { 126 puts (cmdtp->help); 127 } else { 128 puts ("- No help available.\n"); 129 rcode = 1; 130 } 131 putc ('\n'); 132 #else /* no long help available */ 133 if (cmdtp->usage) 134 puts (cmdtp->usage); 135 #endif /* CFG_LONGHELP */ 136 } else { 137 printf ("Unknown command '%s' - try 'help'" 138 " without arguments for list of all" 139 " known commands\n\n", argv[i] 140 ); 141 rcode = 1; 142 } 143 } 144 return rcode; 145 } 146 147 148 cmd_tbl_t U_BOOT_CMD(HELP) = MK_CMD_ENTRY( 149 "help", CFG_MAXARGS, 1, do_help, 150 "help - print online help\n", 151 "[command ...]\n" 152 " - show help information (for 'command')\n" 153 "'help' prints online help for the monitor commands.\n\n" 154 "Without arguments, it prints a short usage message for all commands.\n\n" 155 "To get detailed help information for specific commands you can type\n" 156 "'help' with one or more command names as arguments.\n" 157 ); 158 159 cmd_tbl_t U_BOOT_CMD(QUES) = MK_CMD_ENTRY( 160 "?", CFG_MAXARGS, 1, do_help, 161 "? - alias for 'help'\n", 162 NULL 163 ); 164 165 cmd_tbl_t U_BOOT_CMD(VERS) = MK_CMD_ENTRY( 166 "version", 1, 1, do_version, 167 "version - print monitor version\n", 168 NULL 169 ); 170 171 cmd_tbl_t U_BOOT_CMD(ECHO) = MK_CMD_ENTRY( 172 "echo", CFG_MAXARGS, 1, do_echo, 173 "echo - echo args to console\n", 174 "[args..]\n" 175 " - echo args to console; \\c suppresses newline\n" 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