cookey.py: Clear the terminal TOSTOP flag if set (and warn the user)

2 files changed, 11 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 02d82f59d..873ab86e0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -32,6 +32,7 @@ Changes in Bitbake 1.8.x:
 	- Sort digraph output to make builds more reproducible
 	- Split expandKeys into two for loops to benefit from the expand_cache (12% speedup)
 	- runqueue.py: Fix idepends handling to avoid dependency errors
+	- Clear the terminal TOSTOP flag if set (and warn the user)
 
 Changes in Bitbake 1.8.6:
 	- Correctly redirect stdin when forking
diff --git a/lib/bb/cooker.py b/lib/bb/cooker.py
index 955fbb434..6ee6f07d4 100644
--- a/lib/bb/cooker.py
+++ b/lib/bb/cooker.py
@@ -73,6 +73,16 @@ class BBCooker:
         self.configuration.event_data = bb.data.createCopy(self.configuration.data)
         bb.data.update_data(self.configuration.event_data)
 
+        #
+        # TOSTOP must not be set or our children will hang when they output
+        #
+        import termios
+        tcattr = termios.tcgetattr(sys.stdout.fileno())
+        if tcattr[3] & termios.TOSTOP:
+            bb.msg.note(1, bb.msg.domain.Build, "The terminal had the TOSTOP bit set, clearing...")
+            tcattr[3] = tcattr[3] & ~termios.TOSTOP
+            termios.tcsetattr(sys.stdout.fileno(), termios.TCSANOW, tcattr)
+
     def tryBuildPackage(self, fn, item, task, the_data, build_depends):
         """
         Build one task of a package, optionally build following task depends