git-am: Don't accept an mbox on stdin of we already have a .dotest directory

diff --git a/merge-index.c b/merge-index.c
index 024196e7ac53cb9ad09b38ea646bad81aff33306..0498a6f45e53947e356c6a390869d3f8194f05b7 100644 (file)
--- a/merge-index.c
+++ b/merge-index.c
@@ -1,5 +1,6 @@
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <signal.h>
 
 #include "cache.h"
 
@@ -99,6 +100,11 @@ int main(int argc, char **argv)
 {
        int i, force_file = 0;
 
+       /* Without this we cannot rely on waitpid() to tell
+        * what happened to our children.
+        */
+       signal(SIGCHLD, SIG_DFL);
+
        if (argc < 3)
                usage("git-merge-index [-o] [-q] <merge-program> (-a | <filename>*)");