--- a/simtool/hlread.c	Fri Feb 19 06:53:14 2021 +0000
+++ b/simtool/hlread.c	Fri Feb 19 06:59:56 2021 +0000
@@ -8,7 +8,9 @@
 #include "curfile.h"
 #include "file_id.h"
 
-cmd_iccid()
+cmd_iccid(argc, argv, outf)
+	char **argv;
+	FILE *outf;
 {
 	int rc;
 	char buf[21], *cp;
@@ -33,11 +35,13 @@
 	for (cp = buf + 20; (cp > buf + 1) && (cp[-1] == 'F'); cp--)
 		;
 	*cp = '\0';
-	printf("%s\n", buf);
+	fprintf(outf, "%s\n", buf);
 	return(0);
 }
 
-cmd_imsi()
+cmd_imsi(argc, argv, outf)
+	char **argv;
+	FILE *outf;
 {
 	int rc;
 	char buf[17];
@@ -60,11 +64,14 @@
 		return(rc);
 	decode_reversed_nibbles(sim_resp_data + 1, 8, buf);
 	buf[16] = '\0';
-	printf("%s parity=%c len=%u\n", buf + 1, buf[0], sim_resp_data[0]);
+	fprintf(outf, "%s parity=%c len=%u\n", buf + 1, buf[0],
+		sim_resp_data[0]);
 	return(0);
 }
 
-cmd_spn()
+cmd_spn(argc, argv, outf)
+	char **argv;
+	FILE *outf;
 {
 	int rc;
 	unsigned textlen;
@@ -85,13 +92,13 @@
 	rc = readbin_op(0, 17);
 	if (rc < 0)
 		return(rc);
-	printf("Display condition: %02X\n", sim_resp_data[0]);
-	printf("SPN: ");
+	fprintf(outf, "Display condition: %02X\n", sim_resp_data[0]);
+	fputs("SPN: ", outf);
 	rc = validate_alpha_field(sim_resp_data + 1, 16, &textlen);
 	if (rc >= 0)
-		print_alpha_field(sim_resp_data, textlen, stdout);
+		print_alpha_field(sim_resp_data, textlen, outf);
 	else
-		printf("malformed alpha field");
-	putchar('\n');
+		fputs("malformed alpha field", outf);
+	putc('\n', outf);
 	return(0);
 }