Add --bwlimit option contributed by Matthew Demicco and Jamie Gritton.

[rsync/rsync.git] / io.c

diff --git a/io.c b/io.c
index fbaf6a3..20fc2ba 100644 (file)
--- a/io.c
+++ b/io.c
@@ -27,6 +27,8 @@
 /* if no timeout is specified then use a 60 second select timeout */
 #define SELECT_TIMEOUT 60
 
+extern int bwlimit;
+
 static int io_multiplexing_out;
 static int io_multiplexing_in;
 static int multiplex_in_fd;
@@ -388,6 +390,19 @@ static void writefd_unbuffered(int fd,char *buf,int len)
                                exit_cleanup(RERR_STREAMIO);
                        }
 
+                       /* Sleep after writing to limit I/O bandwidth */
+                       if (bwlimit)
+                       {
+                           tv.tv_sec = 0;
+                           tv.tv_usec = ret * 1000 / bwlimit;
+                           while (tv.tv_usec > 1000000)
+                           {
+                               tv.tv_sec++;
+                               tv.tv_usec -= 1000000;
+                           }
+                           select(0, NULL, NULL, NULL, &tv);
+                       }
+ 
                        total += ret;
 
                        if (io_timeout)