co2minimon

commit 6983af71648475f0e6d87ddc031e5238e811b748
parent dc3a1dbe09898be7c56ab5b11a0c61ef2cb98734
Author: Amin Mesbah <dev@aminmesbah.com>
Date:   Sat, 28 May 2022 22:39:07 -0700

Fix select() timeout after hibernate

`select()` was timing out unceasingly after resume from system
hibernation. Setting the fd_set right before calling `select()` fixes
that.

Diffstat:
M
main.c
 | 
6
+++---

1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/main.c b/main.c
@@ -53,7 +53,6 @@ int main(void)
     bool error_occurred = false;
     int device_handle = -1;
     bool need_send_feature_report = true;
-    fd_set read_fds;
 
     while (running)
     {
@@ -80,8 +79,6 @@ int main(void)
                 goto error;
             }
 
-            FD_ZERO(&read_fds);
-            FD_SET(device_handle, &read_fds);
             need_send_feature_report = true;
         }
 
@@ -96,6 +93,9 @@ int main(void)
             need_send_feature_report = false;
         }
 
+        fd_set read_fds;
+        FD_ZERO(&read_fds);
+        FD_SET(device_handle, &read_fds);
         errno = 0;
         int ready = select(device_handle + 1, &read_fds, NULL, NULL, &(struct timeval){ .tv_sec = 15 });
         if (ready == -1 && errno != EINTR)