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 #ifdef CONFIG_CFG_STRINGS
  14
  15 static char *start_addr, *last_addr;
  16
  17 int do_strings(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  18 {
  19         if (argc == 1) {
  20                 printf("Usage:\n%s\n", cmdtp->usage);
  21                 return 1;
  22         }
  23
  24         if ((flag & CMD_FLAG_REPEAT) == 0) {
  25                 start_addr = (char *)simple_strtoul(argv[1], NULL, 16);
  26                 if (argc > 2)
  27                         last_addr = (char *)simple_strtoul(argv[2], NULL, 16);
  28                 else
  29                         last_addr = (char *)-1;
  30         }
  31
  32         char *addr = start_addr;
  33         do {
  34                 printf("%s\n", addr);
  35                 addr += strlen(addr) + 1;
  36         } while (addr[0] && addr < last_addr);
  37
  38         last_addr = addr + (last_addr - start_addr);
  39         start_addr = addr;
  40
  41         return 0;
  42 }
  43
  44 U_BOOT_CMD(strings, 3, 1, do_strings,
  45         "strings - display strings\n",
  46         "<addr> [byte count]\n"
  47         "    - display strings at <addr> for at least [byte count] or first double NUL\n");
  48
  49 #endif