1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright 2022
4 * Roger Knecht <rknecht@pm.de>
5 */
6
7#include <common.h>
8#include <command.h>
9#include <fs.h>
10#include <malloc.h>
11#include <mapmem.h>
12
13static int do_cat(struct cmd_tbl *cmdtp, int flag, int argc,
14		  char *const argv[])
15{
16	char *ifname;
17	char *dev;
18	char *file;
19	char *buffer;
20	ulong file_size;
21	int ret;
22
23	if (argc < 4)
24		return CMD_RET_USAGE;
25
26	ifname = argv[1];
27	dev = argv[2];
28	file = argv[3];
29
30	ret = fs_load_alloc(ifname, dev, file, 0, 0, (void **)&buffer,
31			    &file_size);
32
33	// check file exists
34	switch (ret) {
35	case 0:
36		break;
37	case -ENOMEDIUM:
38		return CMD_RET_FAILURE;
39	case -ENOENT:
40		log_err("File does not exist: ifname=%s dev=%s file=%s\n", ifname, dev, file);
41		return CMD_RET_FAILURE;
42	case -E2BIG:
43		log_err("File is too large: ifname=%s dev=%s file=%s\n", ifname, dev, file);
44		return CMD_RET_FAILURE;
45	case -ENOMEM:
46		log_err("Not enough memory: ifname=%s dev=%s file=%s\n", ifname, dev, file);
47		return CMD_RET_FAILURE;
48	default:
49	case -EIO:
50		log_err("File-read failed: ifname=%s dev=%s file=%s\n", ifname, dev, file);
51		return CMD_RET_FAILURE;
52	}
53
54	// print file content
55	buffer[file_size] = '\0';
56	puts(buffer);
57
58	free(buffer);
59
60	return 0;
61}
62
63U_BOOT_LONGHELP(cat,
64	"<interface> <dev[:part]> <file>\n"
65	"  - Print file from 'dev' on 'interface' to standard output\n");
66
67U_BOOT_CMD(cat, 4, 1, do_cat,
68	   "Print file to standard output",
69	   cat_help_text
70);
71