From 98e3d3f36feea8550e12b02f07414643cbfcd5e0 Mon Sep 17 00:00:00 2001
From: Wolfgang Hommel <wolf@code-wizards.com>
Date: Sat, 2 Apr 2022 13:47:04 +0200
Subject: select(): Scale timeout parameter by user rate on return (addresses
 #382)

---
 src/libfaketime.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/libfaketime.c b/src/libfaketime.c
index 0c28e5f..684f153 100644
--- a/src/libfaketime.c
+++ b/src/libfaketime.c
@@ -1725,6 +1725,21 @@ int select(int nfds, fd_set *readfds,
 #else
   DONT_FAKE_TIME(ret = (*real_select)(nfds, readfds, writefds, errorfds, timeout == NULL ? timeout : &timeout_real));
 #endif
+
+  /* scale timeout back if user rate is set, #382 */
+  if (user_rate_set && (timeout != NULL)) 
+  {
+    struct timespec ts;
+
+    ts.tv_sec = timeout_real.tv_sec;
+    ts.tv_nsec = timeout_real.tv_usec * 1000;
+
+    timespecmul(&ts, user_rate, &ts);
+
+    timeout->tv_sec = ts.tv_sec;
+    timeout->tv_usec = ts.tv_nsec / 1000;
+  } 
+
   return ret;
 }
 
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