X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/6dd41b67fbe371b60f73e83a717e818dd2567f63..62b68c80466e9e3b9bb39e0bc5219ba32534235f:/util.c

diff --git a/util.c b/util.c
index 3e4e0f40..245f3b29 100644
--- a/util.c
+++ b/util.c
@@ -478,27 +478,47 @@ int robust_rename(char *from, char *to)
 static pid_t all_pids[10];
 static int num_pids;
 
-/* fork and record the pid of the child */
+/** Fork and record the pid of the child. **/
 pid_t do_fork(void)
 {
 	pid_t newpid = fork();
 	
-	if (newpid) {
+	if (newpid != 0  &&  newpid != -1) {
 		all_pids[num_pids++] = newpid;
 	}
 	return newpid;
 }
 
-/* kill all children */
+/**
+ * Kill all children.
+ *
+ * @todo It would be kind of nice to make sure that they are actually
+ * all our children before we kill them, because their pids may have
+ * been recycled by some other process.  Perhaps when we wait for a
+ * child, we should remove it from this array.  Alternatively we could
+ * perhaps use process groups, but I think that would not work on
+ * ancient Unix versions that don't support them.
+ **/
 void kill_all(int sig)
 {
 	int i;
-	for (i=0;i<num_pids;i++) {
-		if (all_pids[i] != getpid())
-			kill(all_pids[i], sig);
+
+	for (i = 0; i < num_pids; i++) {
+		/* Let's just be a little careful where we
+		 * point that gun, hey?  See kill(2) for the
+		 * magic caused by negative values. */
+		pid_t p = all_pids[i];
+
+		if (p == getpid())
+			continue;
+		if (p <= 0)
+			continue;
+
+		kill(p, sig);
 	}
 }
 
+
 /* turn a user name into a uid */
 int name_to_uid(char *name, uid_t *uid)
 {
@@ -866,7 +886,14 @@ static void rprint_progress(OFF_T ofs, OFF_T size, struct timeval *now,
     unsigned long diff = msdiff(&start_time, now);
     double        rate = diff ? (double) (ofs-start_ofs) * 1000.0 / diff / 1024.0 : 0;
     const char    *units;
-    double        remain = rate ? (double) (size-ofs) / rate / 1000.0: 0.0;
+    /* If we've finished transferring this file, show the time taken;
+     * otherwise show expected time to complete.  That's kind of
+     * inconsistent, but people can probably cope.  Hopefully we'll
+     * get more consistent and complete progress reporting soon. --
+     * mbp */
+    double        remain = is_last
+                        ? (double) diff / 1000.0
+                        : rate ? (double) (size-ofs) / rate / 1000.0 : 0.0;
     int 	  remain_h, remain_m, remain_s;
 
     if (rate > 1024*1024) {