690a1d6948
Add cat command to print file content to standard out Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Roger Knecht <rknecht@pm.me>
86 lines
1.7 KiB
C
86 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2022
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* Roger Knecht <rknecht@pm.de>
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*/
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#include <common.h>
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#include <command.h>
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#include <fs.h>
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#include <malloc.h>
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#include <mapmem.h>
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static int do_cat(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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char *ifname;
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char *dev;
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char *file;
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char *buffer;
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phys_addr_t addr;
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loff_t file_size;
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if (argc < 4)
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return CMD_RET_USAGE;
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ifname = argv[1];
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dev = argv[2];
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file = argv[3];
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// check file exists
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if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY))
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return CMD_RET_FAILURE;
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if (!fs_exists(file)) {
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log_err("File does not exist: ifname=%s dev=%s file=%s\n", ifname, dev, file);
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return CMD_RET_FAILURE;
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}
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// get file size
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if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY))
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return CMD_RET_FAILURE;
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if (fs_size(file, &file_size)) {
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log_err("Cannot read file size: ifname=%s dev=%s file=%s\n", ifname, dev, file);
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return CMD_RET_FAILURE;
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}
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// allocate memory for file content
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buffer = calloc(sizeof(char), file_size + 1);
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if (!buffer) {
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log_err("Out of memory\n");
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return CMD_RET_FAILURE;
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}
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// map pointer to system memory
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addr = map_to_sysmem(buffer);
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// read file to memory
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if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY))
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return CMD_RET_FAILURE;
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if (fs_read(file, addr, 0, 0, &file_size)) {
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log_err("Cannot read file: ifname=%s dev=%s file=%s\n", ifname, dev, file);
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return CMD_RET_FAILURE;
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}
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// print file content
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buffer[file_size] = '\0';
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puts(buffer);
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free(buffer);
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return 0;
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}
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#ifdef CONFIG_SYS_LONGHELP
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static char cat_help_text[] =
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"<interface> <dev[:part]> <file>\n"
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" - Print file from 'dev' on 'interface' to standard output\n";
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#endif
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U_BOOT_CMD(cat, 4, 1, do_cat,
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"Print file to standard output",
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cat_help_text
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);
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