common/Preforker: shut up warning

common/Preforker.h: In member function 'void Preforker::daemonize()':
common/Preforker.h:97:40: warning: ignoring return value of 'ssize_t write(int, const void*, size_t)', declared with attribute warn_unused_result [-Wunused-result]

Signed-off-by: Sage Weil <sage@inktank.com>

diff --git a/src/common/Preforker.h b/src/common/Preforker.h
index 98304c632b719b7ebec93d52d9d42278d7f6e511..00a4d6a8875ea2e11029da3a5a98cad6ce2e4d3e 100644 (file)
--- a/src/common/Preforker.h
+++ b/src/common/Preforker.h
@@ -94,7 +94,8 @@ public:
   void daemonize() {
     assert(forked);
     static int r = -1;
-    (void)::write(fd[1], &r, sizeof(r));
+    int r2 = ::write(fd[1], &r, sizeof(r));
+    r += r2;  // make the compiler shut up about the unused return code from ::write(2).
   }
   
 };