// SPDX-License-Identifier: GPL-2.0+

/*

 * Copyright 2022

 * Roger Knecht <rknecht@pm.de>

 */

#include <command.h>

#include <fs.h>

#include <malloc.h>

#include <mapmem.h>

#include <linux/errno.h>

static int do_cat(struct cmd_tbl *cmdtp, int flag, int argc,

      char *const argv[])

{

  char *ifname;

  char *dev;

  char *file;

  char *buffer;

  ulong file_size;

  int ret;

  if (argc < 4)

    return CMD_RET_USAGE;

  ifname = argv[1];

  dev = argv[2];

  file = argv[3];

  ret = fs_load_alloc(ifname, dev, file, 0, 0, (void **)&buffer,

          &file_size);

  // check file exists

  switch (ret) {

  case 0:

    break;

  case -ENOMEDIUM:

    return CMD_RET_FAILURE;

  case -ENOENT:

    log_err("File does not exist: ifname=%s dev=%s file=%s\n", ifname, dev, file);

    return CMD_RET_FAILURE;

  case -E2BIG:

    log_err("File is too large: ifname=%s dev=%s file=%s\n", ifname, dev, file);

    return CMD_RET_FAILURE;

  case -ENOMEM:

    log_err("Not enough memory: ifname=%s dev=%s file=%s\n", ifname, dev, file);

    return CMD_RET_FAILURE;

  default:

  case -EIO:

    log_err("File-read failed: ifname=%s dev=%s file=%s\n", ifname, dev, file);

    return CMD_RET_FAILURE;

  }

  // print file content

  buffer[file_size] = '\0';

  puts(buffer);

  free(buffer);

  return 0;

}

U_BOOT_LONGHELP(cat,

  "<interface> <dev[:part]> <file>\n"

  "  - Print file from 'dev' on 'interface' to standard output\n");

U_BOOT_CMD(cat, 4, 1, do_cat,

     "Print file to standard output",

     cat_help_text

);