From e7106b54c4ea103c5e46496614ae653f14be09b1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mario=20H=C3=BCttel?= <mario.huettel@gmx.net>
Date: Mon, 27 Apr 2020 21:52:52 +0200
Subject: [PATCH] Add cat command

---
 stm-firmware/shell.c | 55 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 53 insertions(+), 2 deletions(-)

diff --git a/stm-firmware/shell.c b/stm-firmware/shell.c
index bf6a583..f913884 100644
--- a/stm-firmware/shell.c
+++ b/stm-firmware/shell.c
@@ -329,6 +329,49 @@ static shellmatta_retCode_t shell_cmd_reset(const shellmatta_handle_t handle, co
 
 	return SHELLMATTA_BUSY;
 }
+
+static shellmatta_retCode_t shell_cmd_cat(const shellmatta_handle_t handle, const char *arguments,
+					 uint32_t length)
+{
+	FIL file;
+	char path_buff[256];
+	const char *path;
+	UINT bytes_read;
+	FRESULT res;
+
+	strncpy(path_buff, arguments, MIN(sizeof(path_buff), length));
+	path_buff[MIN(length, sizeof(path_buff)-1)] = 0;
+	path = strtok(path_buff, " ");
+	path = strtok(NULL, " ");
+
+	if (strlen(path) == 0) {
+		shellmatta_printf(handle, "Specify path!\r\n");
+		return SHELLMATTA_OK;
+	}
+
+	res = f_open(&file, path, FA_READ);
+	if (res == FR_OK) {
+		shellmatta_write(handle, "\r\n", 2U);
+		do {
+			res = f_read(&file, path_buff, sizeof(path_buff), &bytes_read);
+			if (bytes_read > 0)
+				shellmatta_write(handle, path_buff, bytes_read);
+			else
+				break;
+		} while (res == FR_OK);
+
+		shellmatta_write(handle, "\r\n", 2U);
+	}
+
+	if (res != FR_OK) {
+		shellmatta_printf(handle, "Error reading file\r\n");
+	}
+
+	f_close(&file);
+
+	return SHELLMATTA_OK;
+}
+
 //typedef struct shellmatta_cmd
 //{
 //    char                    *cmd;       /**< command name                           */
@@ -339,7 +382,7 @@ static shellmatta_retCode_t shell_cmd_reset(const shellmatta_handle_t handle, co
 //    struct shellmatta_cmd   *next;      /**< pointer to next command or NULL        */
 //} shellmatta_cmd_t;
 
-static shellmatta_cmd_t cmd[12] = {
+static shellmatta_cmd_t cmd[13] = {
 	{
 		.cmd = "version",
 		.cmdAlias = "ver",
@@ -432,8 +475,16 @@ static shellmatta_cmd_t cmd[12] = {
 		.cmd = "reset",
 		.cmdAlias = NULL,
 		.helpText = "Reset controller",
-		.usageText = "Resets the controller",
+		.usageText = "reset",
 		.cmdFct = shell_cmd_reset,
+		.next = &cmd[12],
+	},
+	{
+		.cmd = "cat",
+		.cmdAlias = NULL,
+		.helpText = "Print file contents",
+		.usageText = "cat <path>",
+		.cmdFct = shell_cmd_cat,
 		.next = NULL,
 	}