Add source debugging to close failure

src/libckpool.c

@@ -440,13 +440,14 @@ void block_socket(int fd)
 	fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
 }
 
-void _Close(int *fd)
+void _close(int *fd, const char *file, const char *func, const int line)
 {
 	if (*fd < 0)
 		return;
 	LOGDEBUG("Closing file handle %d", *fd);
 	if (unlikely(close(*fd)))
-		LOGWARNING("Close of fd %d failed with errno %d:%s", *fd, errno, strerror(errno));
+		LOGWARNING("Close of fd %d failed with errno %d:%s from %s %s:%d",
+			   *fd, errno, strerror(errno), file, func, line);
 	*fd = -1;
 }
 

src/libckpool.h

@@ -426,8 +426,9 @@ void keep_sockalive(int fd);
 void nolinger_socket(int fd);
 void noblock_socket(int fd);
 void block_socket(int fd);
-void _Close(int *fd);
+void _close(int *fd, const char *file, const char *func, const int line);
-#define Close(FD) _Close(&FD)
+#define _Close(FD) _close(FD, __FILE__, __func__, __LINE__)
+#define Close(FD) _close(&FD, __FILE__, __func__, __LINE__)
 int bind_socket(char *url, char *port);
 int connect_socket(char *url, char *port);
 int write_socket(int fd, const void *buf, size_t nbyte);