1 /*
2 * cmd_strings.c - just like `strings` command
3 *
4 * Copyright (c) 2008 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9 #include <config.h>
10 #include <command.h>
11 #include <vsprintf.h>
12 #include <linux/string.h>
13
14 static char *start_addr, *last_addr;
15
do_strings(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])16 int do_strings(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
17 {
18 if (argc == 1)
19 return CMD_RET_USAGE;
20
21 if ((flag & CMD_FLAG_REPEAT) == 0) {
22 start_addr = (char *)hextoul(argv[1], NULL);
23 if (argc > 2)
24 last_addr = (char *)hextoul(argv[2], NULL);
25 else
26 last_addr = (char *)-1;
27 }
28
29 char *addr = start_addr;
30 do {
31 puts(addr);
32 puts("\n");
33 addr += strlen(addr) + 1;
34 } while (addr[0] && addr < last_addr);
35
36 last_addr = addr + (last_addr - start_addr);
37 start_addr = addr;
38
39 return 0;
40 }
41
42 U_BOOT_CMD(
43 strings, 3, 1, do_strings,
44 "display strings",
45 "<addr> [byte count]\n"
46 " - display strings at <addr> for at least [byte count] or first double NUL"
47 );
48