merge with /dev/null as base, instead of punting O==empty case

diff --git a/usage.c b/usage.c
index 86211c9141b788f6dbdf7b192f0ac4f4e2527d64..dfa87fe1191862b2c650e55fdd727802ef00cf34 100644 (file)
--- a/usage.c
+++ b/usage.c
@@ -15,7 +15,7 @@ static void report(const char *prefix, const char *err, va_list params)
 void usage(const char *err)
 {
        fprintf(stderr, "usage: %s\n", err);
-       exit(1);
+       exit(129);
 }
 
 void die(const char *err, ...)
@@ -25,7 +25,7 @@ void die(const char *err, ...)
        va_start(params, err);
        report("fatal: ", err, params);
        va_end(params);
-       exit(1);
+       exit(128);
 }
 
 int error(const char *err, ...)