common/cmd_strings.c

   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 <common.h>
  11 #include <command.h>
  12
  13 static char *start_addr, *last_addr;
  14
  15 int do_strings(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  16 {
  17         if (argc == 1) {
  18                 cmd_usage(cmdtp);
  19                 return 1;
  20         }
  21
  22         if ((flag & CMD_FLAG_REPEAT) == 0) {
  23                 start_addr = (char *)simple_strtoul(argv[1], NULL, 16);
  24                 if (argc > 2)
  25                         last_addr = (char *)simple_strtoul(argv[2], NULL, 16);
  26                 else
  27                         last_addr = (char *)-1;
  28         }
  29
  30         char *addr = start_addr;
  31         do {
  32                 puts(addr);
  33                 puts("\n");
  34                 addr += strlen(addr) + 1;
  35         } while (addr[0] && addr < last_addr);
  36
  37         last_addr = addr + (last_addr - start_addr);
  38         start_addr = addr;
  39
  40         return 0;
  41 }
  42
  43 U_BOOT_CMD(strings, 3, 1, do_strings,
  44         "strings - display strings\n",
  45         "<addr> [byte count]\n"
  46         "    - display strings at <addr> for at least [byte count] or first double NUL\n");