--- a/simtool/sstlist.c	Fri Feb 19 07:26:15 2021 +0000
+++ b/simtool/sstlist.c	Fri Feb 19 07:30:17 2021 +0000
@@ -10,7 +10,9 @@
 #include "curfile.h"
 #include "file_id.h"
 
-cmd_sst()
+cmd_sst(argc, argv, outf)
+	char **argv;
+	FILE *outf;
 {
 	int rc;
 	unsigned byte, pos, code, nserv, linelen;
@@ -48,21 +50,21 @@
 			if (!(code & 1))
 				continue;
 			if (linelen > 73) {
-				putchar('\n');
+				putc('\n', outf);
 				linelen = 0;
 			}
 			if (linelen) {
-				putchar(' ');
+				putc(' ', outf);
 				linelen++;
 			}
-			linelen += printf("%u", nserv);
+			linelen += fprintf(outf, "%u", nserv);
 			if (!(code & 2)) {
-				putchar('^');
+				putc('^', outf);
 				linelen++;
 			}
 		}
 	}
 	if (linelen)
-		putchar('\n');
+		putc('\n', outf);
 	return(0);
 }