1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2022
4 * Roger Knecht <rknecht@pm.de>
5 */
6
7 #include <command.h>
8 #include <fs.h>
9 #include <malloc.h>
10 #include <mapmem.h>
11 #include <linux/errno.h>
12
do_cat(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])13 static 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
63 U_BOOT_LONGHELP(cat,
64 "<interface> <dev[:part]> <file>\n"
65 " - Print file from 'dev' on 'interface' to standard output\n");
66
67 U_BOOT_CMD(cat, 4, 1, do_cat,
68 "Print file to standard output",
69 cat_help_text
70 );
71