shell: mufs: implement mufs cp to copy files

source/shell/mufs.c

@@ -15,6 +15,7 @@
 #include <shell.h>
 
 #include <shell/mufs.h>
+#include <shell/progress.h>
 
 extern struct flash_dev *flash;
 struct mufs *mufs = NULL;
@@ -274,6 +275,75 @@ int shell_mv(struct console *con, size_t argc, const char **argv)
 	return 0;
 }
 
+int shell_cp(struct console *con, size_t argc, const char **argv)
+{
+	struct mufs_stat stat;
+	struct mufs_file *in, *out;
+	char data[256];
+	size_t ret;
+	size_t count = 0;
+	size_t total;
+
+	if (!mufs) {
+		fprintf(con->fp, "error: no file system mounted.\n");
+		return -1;
+	}
+
+	if (argc < 2) {
+		fprintf(con->fp, "usage: mufs cp <src> <dst>\n");
+		return -1;
+	}
+
+	if (mufs_stat(mufs, argv[0], &stat) < 0) {
+		fprintf(con->fp, "error: unable to stat the file\n");
+		return -1;
+	}
+
+	if (stat.type != MUFS_FILE) {
+		fprintf(con->fp, "error: only able to copy files\n");
+		return -1;
+	}
+
+	total = stat.file_size;
+
+	if (!(in = mufs_open(mufs, argv[0], MUFS_READ))) {
+		fprintf(con->fp, "error: unable to open the file\n");
+		return -1;
+	}
+
+	if (!(out = mufs_open(mufs, argv[1], MUFS_WRITE))) {
+		fprintf(con->fp, "error: unable to open the file\n");
+		goto err_close_in;
+	}
+
+	while (count < total) {
+		draw_progress(con->fp, count, total);
+
+		ret = mufs_read(in, data, sizeof data);
+
+		if (ret == 0)
+			break;
+
+		ret = mufs_write(out, data, ret);
+
+		if (ret == 0)
+			break;
+
+		count += ret;
+	}
+
+	fputc('\n', con->fp);
+
+	mufs_close(out);
+	mufs_close(in);
+
+	return 0;
+
+err_close_in:
+	mufs_close(in);
+	return -1;
+}
+
 int shell_rm(struct console *con, size_t argc, const char **argv)
 {
 	if (argc < 1) {
@@ -334,6 +404,7 @@ static struct cmd mufs_cmds[] = {
 	{ "write", NULL, shell_write },
 	{ "append", NULL, shell_append },
 	{ "mv", NULL, shell_mv, },
+	{ "cp", NULL, shell_cp, },
 	{ "rm", NULL, shell_rm, },
 	{ NULL, NULL, NULL },
 };