Fix return values in rm(1) and mv(1)

by setting rm_status to 1 if removing 1 file in the list fails.
Extend this to mv_status in mv(1).

fs.h

@@ -9,6 +9,7 @@ extern int cp_status;
 
 extern int rm_fflag;
 extern int rm_rflag;
+extern int rm_status;
 
 int cp(const char *, const char *);
 void rm(const char *);

libutil/rm.c

@@ -6,12 +6,16 @@
 
 int rm_fflag = 0;
 int rm_rflag = 0;
+int rm_status = 0;
 
 void
 rm(const char *path)
 {
 	if (rm_rflag)
 		recurse(path, rm);
-	if (remove(path) < 0 && !rm_fflag)
-		eprintf("remove %s:", path);
+	if (remove(path) < 0) {
+		if (!rm_fflag)
+			weprintf("remove %s:", path);
+		rm_status = 1;
+	}
 }

mv.c

@@ -8,7 +8,23 @@
 #include "fs.h"
 #include "util.h"
 
-static int mv(const char *, const char *);
+int mv_status = 0;
+
+static int
+mv(const char *s1, const char *s2)
+{
+	if (rename(s1, s2) == 0)
+		return (mv_status = 0);
+	if (errno == EXDEV) {
+		cp_rflag = 1;
+		rm_rflag = 1;
+		cp(s1, s2);
+		rm(s1);
+		return (mv_status = cp_status || rm_status);
+	}
+	mv_status = 1;
+	return -1;
+}
 
 static void
 usage(void)
@@ -36,20 +52,5 @@ main(int argc, char *argv[])
 		eprintf("%s: not a directory\n", argv[argc-1]);
 	enmasse(argc, &argv[0], mv);
 
-	return 0;
-}
-
-static int
-mv(const char *s1, const char *s2)
-{
-	if (rename(s1, s2) == 0)
-		return 0;
-	if (errno == EXDEV) {
-		cp_rflag = 1;
-		rm_rflag = 1;
-		cp(s1, s2);
-		rm(s1);
-		return 0;
-	}
-	return -1;
+	return mv_status;
 }

rm.c

@@ -41,5 +41,5 @@ main(int argc, char *argv[])
 	for (; argc > 0; argc--, argv++)
 		rm(argv[0]);
 
-	return 0;
+	return rm_status;
 }