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RWRn5d3Yx35u053/hMWfMVQjK9jOixDooGGH4cuuIjxB4HUvgZA2IjNVGzAjaCMGuPXucrVI7CEgLfx/HkzW1ajiNMqtm0QnEgI=
--- cp.c.dist	Fri Jun 28 10:34:58 2019
+++ cp.c	Mon May 10 14:51:29 2021
@@ -71,7 +73,7 @@
 PATH_T to = { to.p_path, "" };
 
 uid_t myuid;
-int Rflag, fflag, iflag, pflag, rflag, vflag;
+int Rflag, fflag, iflag, pflag, rflag, vflag, sflag;
 mode_t myumask;
 
 enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE };
@@ -87,8 +89,8 @@
 	int Hflag, Lflag, Pflag, ch, fts_options, r;
 	char *target;
 
-	Hflag = Lflag = Pflag = Rflag = 0;
-	while ((ch = getopt(argc, argv, "HLPRafiprv")) != -1)
+	Hflag = Lflag = Pflag = Rflag = sflag = 0;
+	while ((ch = getopt(argc, argv, "HLPRafiprsv")) != -1)
 		switch (ch) {
 		case 'H':
 			Hflag = 1;
@@ -124,6 +126,9 @@
 			break;
 		case 'r':
 			rflag = 1;
+			break;
+		case 's':
+			sflag = 1;
 			break;
 		case 'v':
 			vflag = 1;
--- extern.h.dist	Sat Dec 26 15:11:43 2015
+++ extern.h	Mon May 10 14:51:24 2021
@@ -40,7 +42,7 @@
 
 extern PATH_T to;
 extern uid_t myuid;
-extern int fflag, iflag, pflag;
+extern int fflag, iflag, pflag, sflag;
 extern mode_t myumask;
 extern char *__progname;
 
--- cp.1.dist	Mon Sep  2 18:18:41 2019
+++ cp.1	Sun Jul 25 19:51:36 2021
@@ -41,14 +42,14 @@
 .Nd copy files
 .Sh SYNOPSIS
 .Nm cp
-.Op Fl afipv
+.Op Fl afipsv
 .Oo
 .Fl R
 .Op Fl H | L | P
 .Oc
 .Ar source target
 .Nm cp
-.Op Fl afipv
+.Op Fl afipsv
 .Oo
 .Fl R
 .Op Fl H | L | P
@@ -128,6 +129,10 @@
 and either the user ID or group ID cannot be preserved, neither
 the set-user-ID nor set-group-ID bits are preserved in the copy's
 permissions.
+.It Fl s
+Supplement existing files in the destination directory.  If a file with
+the same name as a source file already exists in the target directory,
+it is not overwritten, and no copy of that source file is performed.
 .It Fl R
 If
 .Ar source
@@ -242,7 +247,7 @@
 specification.
 .Pp
 The flags
-.Op Fl av
+.Op Fl asv
 are extensions to that specification.
 .Pp
 Historic versions of the
--- utils.c.dist	Fri Jun 28 10:34:58 2019
+++ utils.c	Wed Jul 28 09:09:03 2021
@@ -78,6 +81,13 @@
 
 	fs = entp->fts_statp;
 
+	if (sflag==1) {
+		if (exists) { close(from_fd); return 1; } else {
+			fprintf (stderr,
+			"%s doesn't already exist, copying\n",to.p_path);
+		}
+	}
+
 	/*
 	 * In -f (force) mode, we always unlink the destination first
 	 * if it exists.  Note that -i and -f are mutually exclusive.
@@ -326,9 +336,9 @@
 usage(void)
 {
 	(void)fprintf(stderr,
-	    "usage: %s [-afipv] [-R [-H | -L | -P]] source target\n", __progname);
+	    "usage: %s [-afipsv] [-R [-H | -L | -P]] source target\n", __progname);
 	(void)fprintf(stderr,
-	    "       %s [-afipv] [-R [-H | -L | -P]] source ... directory\n",
+	    "       %s [-afipsv] [-R [-H | -L | -P]] source ... directory\n",
 	    __progname);
 	exit(1);
 }