cmd/echo.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2000-2009
   4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5  */
   6
   7 #include <common.h>
   8 #include <command.h>
   9
  10 static int do_echo(struct cmd_tbl *cmdtp, int flag, int argc,
  11                    char *const argv[])
  12 {
  13         int i;
  14         int putnl = 1;
  15
  16         for (i = 1; i < argc; i++) {
  17                 char *p = argv[i];
  18                 char *nls; /* new-line suppression */
  19
  20                 if (i > 1)
  21                         putc(' ');
  22
  23                 nls = strstr(p, "\\c");
  24                 if (nls) {
  25                         char *prenls = p;
  26
  27                         putnl = 0;
  28                         /*
  29                          * be paranoid and guess that someone might
  30                          * say \c more than once
  31                          */
  32                         while (nls) {
  33                                 *nls = '\0';
  34                                 puts(prenls);
  35                                 *nls = '\\';
  36                                 prenls = nls + 2;
  37                                 nls = strstr(prenls, "\\c");
  38                         }
  39                         puts(prenls);
  40                 } else {
  41                         puts(p);
  42                 }
  43         }
  44
  45         if (putnl)
  46                 putc('\n');
  47
  48         return 0;
  49 }
  50
  51 U_BOOT_CMD(
  52         echo,   CONFIG_SYS_MAXARGS,     1,      do_echo,
  53         "echo args to console",
  54         "[args..]\n"
  55         "    - echo args to console; \\c suppresses newline"
  56 );