More specific TODOs for one way of implementing #81.

src/include/pv-internal.h

@@ -518,12 +518,11 @@ struct pvwatchfd_s {
 	off_t size;			 /* size of whole file, 0 if unknown */
 	off_t position;			 /* position last seen at */
 	struct timespec start_time;	 /* time we started watching the fd */
-	/* TODO: changes for #81, retaining closed fds for a little while: */
-	/* TODO: track "closed" as well as "displayable"/"unused" */
-	/* TODO: track when closed, i.e. when ready to be removed */
+	struct timespec last_active;	 /* time the fd was last seen open (TODO, #81) */
 	pid_t watch_pid;		 /* PID to watch */
 	int watch_fd;			 /* fd to watch */
 	bool displayable;		 /* false if not displayable */
+	bool inactive;			 /* true if the fd is now closed (TODO, #81) */
 	bool unused;			 /* true if free for re-use */
 };
 typedef struct pvwatchfd_s *pvwatchfd_t;

src/pv/loop.c

@@ -712,6 +712,7 @@ int pv_watchfd_loop(pvstate_t state)
 		int fd;			 /* watched fd, or -1 for all */
 		pvwatchfd_t info_array;	 /* watch information for each fd */
 		int array_length;	 /* length of watch info array */
+		/* TODO: "finished but not time to stop showing" flag for #81 */
 		bool finished;		 /* "PID:FD": fd closed; or PID gone */
 	} *watching;
 	unsigned int watch_idx;