vmon: don't exit when waitpid() fails w/ECHILDHEADmaster

This bug was introduced when 85547b0 added --reaper support.

When the waitpid() loop ends with an ECHILD error it shouldn't be a
problem, since this loop is intended to consume all eligible children in
a batch and may under normal conditions exhaust children.  That
shouldn't prevent honoring things like --linger, which the existing code
interfered with by assigning to vmon->done in the waitpid() error path.

Just make the error branch that sets vmon->done conditional on errno !=
ECHILD, treating that as normal.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/vmon.c b/src/vmon.c
index 7225385..8e11dca 100644
--- a/src/vmon.c
+++ b/src/vmon.c
@@ -1047,7 +1047,7 @@ int main(int argc, const char * const *argv)
 				}
 			}
 
-			if (reaped < 0) {
+			if (reaped < 0 && errno != ECHILD) {
 				VWM_ERROR("failed to waitpid on SIGCHLD: %s", strerror(errno));
 				vmon->done = 1;
 			}