LXR uboot/common/cmd

   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(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
  43U_BOOT_CMD(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