tree-wide: make more code use safe_close()

Replace this:

        close(fd);
        fd = -1;

write this:

        fd = safe_close(fd);

2 files changed, 20 insertions, 4 deletions

diff --git a/coccinelle/safe_close.cocci b/coccinelle/safe_close.cocci
new file mode 100644
index 000000000..6fedd804f
--- /dev/null
+++ b/coccinelle/safe_close.cocci
@@ -0,0 +1,18 @@
+@@
+expression fd;
+@@
+- close(fd);
+- fd = -1;
++ fd = safe_close(fd);
+@@
+expression fd;
+@@
+- close_nointr(fd);
+- fd = -1;
++ fd = safe_close(fd);
+@@
+expression fd;
+@@
+- safe_close(fd);
+- fd = -1;
++ fd = safe_close(fd);
diff --git a/src/login/logind-button.c b/src/login/logind-button.c
index 210b889c4..3324c4622 100644
--- a/src/login/logind-button.c
+++ b/src/login/logind-button.c
@@ -240,8 +240,7 @@ int button_open(Button *b) {
         assert(b);
 
         if (b->fd >= 0) {
-                close(b->fd);
-                b->fd = -1;
+                b->fd = safe_close(b->fd);
         }
 
         p = strjoina("/dev/input/", b->name);
@@ -267,8 +266,7 @@ int button_open(Button *b) {
         return 0;
 
 fail:
-        close(b->fd);
-        b->fd = -1;
+        b->fd = safe_close(b->fd);
         return r;
 }