lib/spawn.c run_command: don't loop forever if waitpid() is returning ECHILD

If SIGCHILD is being ignored, waitpid() will forever error with ECHILD and
this loop with never end, so don't loop if it errors with ECHILD.

diff --git a/lib/spawn.c b/lib/spawn.c
index fc4ad95c7c429aeac246e0523073e9e82cf2a8df..d0b5fb26e2594a2ee13c1e1948361e5d2c90b4f0 100644 (file)
--- a/lib/spawn.c
+++ b/lib/spawn.c
@@ -68,6 +68,8 @@ int run_command (const char *cmd, const char *argv[],
 
        do {
                wpid = waitpid (pid, status, 0);
+               if ((pid_t)-1 == wpid && errno == ECHILD)
+                       break;
        } while (   ((pid_t)-1 == wpid && errno == EINTR)
                 || ((pid_t)-1 != wpid && wpid != pid));