[PATCH 2/2] keytable: if the protocols cannot be changed, don't try

[Sean Young]

Note that if an invalid protocol was selected, we already get the error
"Invalid protocols selected".

Signed-off-by: Sean Young <s...@mess.org>
---
 utils/keytable/keytable.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/utils/keytable/keytable.c b/utils/keytable/keytable.c
index 7b0d1acb..1fd545b0 100644
--- a/utils/keytable/keytable.c
+++ b/utils/keytable/keytable.c
@@ -23,6 +23,7 @@
 #include <linux/input.h>
 #include <sys/ioctl.h>
 #include <sys/types.h>
+#include <sys/stat.h>
 #include <dirent.h>
 #include <argp.h>
 #include <stdbool.h>
@@ -991,10 +992,14 @@ static int v2_set_protocols(struct rc_device *rc_dev)
 {
        FILE *fp;
        char name[4096];
+       struct stat st;
 
        strcpy(name, rc_dev->sysfs_name);
        strcat(name, "/protocols");
 
+       if (!stat(name, &st) && !(st.st_mode & 0222))
+               return 0;
+
        fp = fopen(name, "w");
        if (!fp) {
                perror(name);
-- 
2.13.5