rerere: add clear, diff, and status commands

diff --git a/merge-index.c b/merge-index.c
index 024196e7ac53cb9ad09b38ea646bad81aff33306..646d090c58e774bdf0f412da39f4b67fd7a696c6 100644 (file)
--- a/merge-index.c
+++ b/merge-index.c
@@ -1,16 +1,18 @@
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <signal.h>
 
 #include "cache.h"
 
-static const char *pgm = NULL;
+static const char *pgm;
 static const char *arguments[8];
 static int one_shot, quiet;
 static int err;
 
 static void run_program(void)
 {
-       int pid = fork(), status;
+       pid_t pid = fork();
+       int status;
 
        if (pid < 0)
                die("unable to fork");
@@ -99,6 +101,11 @@ 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>*)");