common/cmd_echo.c

   1 /*
   2  * Copyright 2000-2009
   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 #include <common.h>
  25 #include <command.h>
  26
  27 int do_echo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  28 {
  29         int i;
  30         int putnl = 1;
  31
  32         for (i = 1; i < argc; i++) {
  33                 char *p = argv[i], c;
  34
  35                 if (i > 1)
  36                         putc(' ');
  37                 while ((c = *p++) != '\0') {
  38                         if (c == '\\' && *p == 'c') {
  39                                 putnl = 0;
  40                                 p++;
  41                         } else {
  42                                 putc(c);
  43                         }
  44                 }
  45         }
  46
  47         if (putnl)
  48                 putc('\n');
  49
  50         return 0;
  51 }
  52
  53 U_BOOT_CMD(
  54         echo,   CONFIG_SYS_MAXARGS,     1,      do_echo,
  55         "echo args to console",
  56         "[args..]\n"
  57         "    - echo args to console; \\c suppresses newline"
  58 );