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-rw-r--r--src/nix-daemon/nix-daemon.cc3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/nix-daemon/nix-daemon.cc b/src/nix-daemon/nix-daemon.cc
index 890bffa19..30e2b5455 100644
--- a/src/nix-daemon/nix-daemon.cc
+++ b/src/nix-daemon/nix-daemon.cc
@@ -816,8 +816,11 @@ static void processConnection(bool trusted)
static void sigChldHandler(int sigNo)
{
+ // Ensure we don't modify errno of whatever we've interrupted
+ auto saved_errno = errno;
/* Reap all dead children. */
while (waitpid(-1, 0, WNOHANG) > 0) ;
+ errno = saved_errno;
}