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(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  11 {
  12         int i;
  13         int putnl = 1;
  14
  15         for (i = 1; i < argc; i++) {
  16                 char *p = argv[i];
  17                 char *nls; /* new-line suppression */
  18
  19                 if (i > 1)
  20                         putc(' ');
  21
  22                 nls = strstr(p, "\\c");
  23                 if (nls) {
  24                         char *prenls = p;
  25
  26                         putnl = 0;
  27                         /*
  28                          * be paranoid and guess that someone might
  29                          * say \c more than once
  30                          */
  31                         while (nls) {
  32                                 *nls = '\0';
  33                                 puts(prenls);
  34                                 *nls = '\\';
  35                                 prenls = nls + 2;
  36                                 nls = strstr(prenls, "\\c");
  37                         }
  38                         puts(prenls);
  39                 } else {
  40                         puts(p);
  41                 }
  42         }
  43
  44         if (putnl)
  45                 putc('\n');
  46
  47         return 0;
  48 }
  49
  50 U_BOOT_CMD(
  51         echo,   CONFIG_SYS_MAXARGS,     1,      do_echo,
  52         "echo args to console",
  53         "[args..]\n"
  54         "    - echo args to console; \\c suppresses newline"
  55 );