--- a/simtool/Makefile	Sun Jan 24 22:46:41 2021 +0000
+++ b/simtool/Makefile	Mon Jan 25 00:14:19 2021 +0000
@@ -2,7 +2,7 @@
 CFLAGS=	-O2 -I/usr/include/PCSC
 PROG=	fc-simtool
 OBJS=	apdu.o atr.o cardconnect.o dispatch.o globals.o hexdump.o hlread.o \
-	main.o names.o readcmd.o readops.o select.o telsum.o
+	main.o names.o readcmd.o readops.o saverestore.o select.o telsum.o
 
 all:	${PROG}
 

--- a/simtool/dispatch.c	Sun Jan 24 22:46:41 2021 +0000
+++ b/simtool/dispatch.c	Mon Jan 25 00:14:19 2021 +0000
@@ -17,6 +17,7 @@
 extern int cmd_readbin();
 extern int cmd_readef();
 extern int cmd_readrec();
+extern int cmd_savebin();
 extern int cmd_select();
 extern int cmd_telecom_sum();
 
@@ -42,6 +43,7 @@
 	{"readbin", 2, 2, cmd_readbin},
 	{"readef", 1, 1, cmd_readef},
 	{"readrec", 1, 2, cmd_readrec},
+	{"savebin", 2, 2, cmd_savebin},
 	{"select", 1, 1, cmd_select},
 	{"sim-resp", 0, 0, display_sim_resp_in_hex},
 	{"telecom-sum", 0, 0, cmd_telecom_sum},

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/simtool/saverestore.c	Mon Jan 25 00:14:19 2021 +0000
@@ -0,0 +1,89 @@
+/*
+ * This module implements commands for saving SIM file content in UNIX host
+ * files and restoring these backups back to the SIM.
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <pcsclite.h>
+#include <winscard.h>
+#include "globals.h"
+
+static
+savebin_transparent(outf)
+	FILE *outf;
+{
+	unsigned off, cc;
+	int rc;
+
+	for (off = 0; off < curfile_total_size; off += cc) {
+		cc = curfile_total_size - off;
+		if (cc > 256)
+			cc = 256;
+		rc = readbin_op(off, cc);
+		if (rc < 0)
+			return(rc);
+		fwrite(sim_resp_data, 1, cc, outf);
+	}
+	return(0);
+}
+
+static
+savebin_records(outf)
+	FILE *outf;
+{
+	unsigned recno;
+	int rc;
+
+	for (recno = 1; recno <= curfile_record_count; recno++) {
+		rc = readrec_op(recno, 0x04, curfile_record_len);
+		if (rc < 0)
+			return(rc);
+		fwrite(sim_resp_data, curfile_record_len, 1, outf);
+	}
+	return(0);
+}
+
+cmd_savebin(argc, argv)
+	char **argv;
+{
+	int file_id, rc;
+	unsigned readlen;
+	FILE *of;
+
+	if (isxdigit(argv[1][0]) && isxdigit(argv[1][1]) &&
+	    isxdigit(argv[1][2]) && isxdigit(argv[1][3]) && !argv[1][4])
+		file_id = strtoul(argv[1], 0, 16);
+	else
+		file_id = find_symbolic_file_name(argv[1]);
+	if (file_id < 0) {
+		fprintf(stderr,
+"error: file ID argument is not a hex value or a recognized symbolic name\n");
+		return(-1);
+	}
+	rc = select_op(file_id);
+	if (rc < 0)
+		return(rc);
+	rc = parse_ef_select_response();
+	if (rc < 0)
+		return(rc);
+	of = fopen(argv[2], "w");
+	if (!of) {
+		perror(argv[2]);
+		return(-1);
+	}
+	switch (curfile_structure) {
+	case 0x00:
+		/* transparent */
+		rc = savebin_transparent(of);
+		break;
+	case 0x01:
+	case 0x03:
+		/* record-based */
+		rc = savebin_records(of);
+		break;
+	}
+	fclose(of);
+	return(rc);
+}