1 files changed, 69 insertions, 0 deletions
diff --git a/cmd/cat.c b/cmd/cat.c
new file mode 100644
index 00000000000..6828b7b364e
--- /dev/null
+++ b/cmd/cat.c
@@ -0,0 +1,69 @@
+// 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>
+
+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
+);