preparatory patch for -Wwrite-strings #2

util-linux/fbset.c

@@ -314,8 +314,8 @@ int fbset_main(int argc, char **argv)
 {
 	struct fb_var_screeninfo var, varset;
 	int fh, i;
-	char *fbdev = DEFAULTFBDEV;
-	char *modefile = DEFAULTFBMODE;
+	const char *fbdev = DEFAULTFBDEV;
+	const char *modefile = DEFAULTFBMODE;
 	char *thisarg, *mode = NULL;
 
 	memset(&varset, 0xFF, sizeof(varset));

util-linux/mdev.c

@@ -141,7 +141,8 @@ static void make_device(char *path, int delete)
 				}
 				if (ENABLE_FEATURE_MDEV_EXEC && field == 3) {
 					// Command to run
-					char *s = "@$*", *s2;
+					const char *s = "@$*";
+					const char *s2;
 					s2 = strchr(s, *pos++);
 					if (!s2) {
 						// Force error

util-linux/switch_root.c

@@ -28,7 +28,7 @@ dev_t rootdev;
 
 // Recursively delete contents of rootfs.
 
-static void delete_contents(char *directory)
+static void delete_contents(const char *directory)
 {
 	DIR *dir;
 	struct dirent *d;