Add the -n option, which automatically answers "no" to the overwrite question.

2 files changed, 27 insertions, 6 deletions

diff --git a/bin/mv/mv.1 b/bin/mv/mv.1
index b73c644..d9a42bd 100644
--- a/bin/mv/mv.1
+++ b/bin/mv/mv.1
@@ -43,7 +43,7 @@
 .Nd move files
 .Sh SYNOPSIS
 .Nm
-.Op Fl f | Fl i
+.Op Fl f | Fl i | Fl n
 .Op Fl v
 .Ar source target
 .Nm
@@ -81,6 +81,8 @@ path.
 .Fl f
 option overrides any previous
 .Fl i
+or
+.Fl n
 options.)
 .It Fl i
 Cause
@@ -96,6 +98,17 @@ the move is attempted.
 .Fl i
 option overrides any previous
 .Fl f
+or
+.Fl n
+options.)
+.It Fl n
+Do not overwriting an existing file.
+(The
+.Fl n
+option overrides any previous
+.Fl f
+or
+.Fl i
 options.)
 .It Fl v
 Cause
diff --git a/bin/mv/mv.c b/bin/mv/mv.c
index 9aaea066..1777a64 100644
--- a/bin/mv/mv.c
+++ b/bin/mv/mv.c
@@ -68,7 +68,7 @@ static const char rcsid[] =
 
 #include "pathnames.h"
 
-int fflg, iflg, vflg;
+int fflg, iflg, nflg, vflg;
 
 int	copy(char *, char *);
 int	do_move(char *, char *);
@@ -85,15 +85,19 @@ main(int argc, char *argv[])
 	int ch;
 	char path[PATH_MAX];
 
-	while ((ch = getopt(argc, argv, "fiv")) != -1)
+	while ((ch = getopt(argc, argv, "finv")) != -1)
 		switch (ch) {
 		case 'i':
 			iflg = 1;
-			fflg = 0;
+			fflg = nflg = 0;
 			break;
 		case 'f':
 			fflg = 1;
-			iflg = 0;
+			iflg = nflg = 0;
+			break;
+		case 'n':
+			nflg = 1;
+			fflg = iflg = 0;
 			break;
 		case 'v':
 			vflg = 1;
@@ -172,7 +176,11 @@ do_move(char *from, char *to)
 
 #define YESNO "(y/n [n]) "
 		ask = 0;
-		if (iflg) {
+		if (nflg) {
+			if (vflg)
+				printf("%s not overwritten\n", to);
+			return (0);
+		} else if (iflg) {
 			(void)fprintf(stderr, "overwrite %s? %s", to, YESNO);
 			ask = 1;
 		} else if (access(to, W_OK) && !stat(to, &sb)) {