LXR uboot/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
  13static char *start_addr, *last_addr;
  14
  15int do_strings(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  16{
  17        if (argc == 1)
  18                return CMD_RET_USAGE;
  19
  20        if ((flag & CMD_FLAG_REPEAT) == 0) {
  21                start_addr = (char *)hextoul(argv[1], NULL);
  22                if (argc > 2)
  23                        last_addr = (char *)hextoul(argv[2], NULL);
  24                else
  25                        last_addr = (char *)-1;
  26        }
  27
  28        char *addr = start_addr;
  29        do {
  30                puts(addr);
  31                puts("\n");
  32                addr += strlen(addr) + 1;
  33        } while (addr[0] && addr < last_addr);
  34
  35        last_addr = addr + (last_addr - start_addr);
  36        start_addr = addr;
  37
  38        return 0;
  39}
  40
  41U_BOOT_CMD(
  42        strings, 3, 1, do_strings,
  43        "display strings",
  44        "<addr> [byte count]\n"
  45        "    - display strings at <addr> for at least [byte count] or first double NUL"
  46);
  47