xref: /openbmc/u-boot/cmd/echo.c (revision 0a333602)
1 /*
2  * Copyright 2000-2009
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 #include <common.h>
9 #include <command.h>
10 
11 static int do_echo(cmd_tbl_t *cmdtp, int flag, int argc, 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 );
57