Correctly open new files

[i3/i3status] / wmiistatus.c

diff --git a/wmiistatus.c b/wmiistatus.c
index 95cc2efa70efb41bf206ff539b9583b524e7ad5a..6604533f83bffc18851cf89142841d94185cddfc 100644 (file)
--- a/wmiistatus.c
+++ b/wmiistatus.c
@@ -102,9 +102,16 @@ static void cleanup_rbar_dir() {
 static void create_file(const char *name) {
        char pathbuf[strlen(wmii_path)+256+1];
        int fd;
+       int flags = O_CREAT | O_WRONLY;
+       struct stat statbuf;
 
        (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
-       if ((fd = open(pathbuf, O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0)
+
+       /* Overwrite file's contents if it exists */
+       if (stat(pathbuf, &statbuf) >= 0)
+               flags |= O_TRUNC;
+
+       if ((fd = open(pathbuf, flags, S_IRUSR | S_IWUSR)) < 0)
                exit(EXIT_FAILURE);
        if (use_colors) {
                char *tmp = concat("#888888 ", wmii_normcolors);