use EXIT_SUCCESS and EXIT_FAILURE for exit status; close #1142

tasks/mrbgem_spec.rake

@@ -124,7 +124,7 @@ module MRuby
             f.puts %Q[  mrb_load_irep(mrb, gem_mrblib_irep_#{funcname});]
             f.puts %Q[  if (mrb->exc) {]
             f.puts %Q[    mrb_p(mrb, mrb_obj_value(mrb->exc));]
-            f.puts %Q[    exit(0);]
+            f.puts %Q[    exit(EXIT_FAILURE);]
             f.puts %Q[  }]
           end
           f.puts %Q[  mrb_gc_arena_restore(mrb, ai);]

tasks/mrbgems_test.rake

@@ -34,7 +34,7 @@ MRuby.each_target do
             f.puts %Q[  mrb_load_irep(mrb2, gem_test_irep_#{g.funcname}_preload);]
             f.puts %Q[  if (mrb2->exc) {]
             f.puts %Q[    mrb_p(mrb2, mrb_obj_value(mrb2->exc));]
-            f.puts %Q[    exit(0);]
+            f.puts %Q[    exit(EXIT_FAILURE);]
             f.puts %Q[  }]
             f.puts %Q[  mrb_const_set(mrb2, mrb_obj_value(mrb2->object_class), mrb_intern(mrb2, "GEMNAME"), mrb_str_new(mrb2, "#{g.name}", #{g.name.length}));]
 
@@ -53,7 +53,7 @@ MRuby.each_target do
             f.puts %Q[  mrb_load_irep(mrb2, gem_test_irep_#{g.funcname}_#{i});]
             f.puts %Q[  if (mrb2->exc) {]
             f.puts %Q[    mrb_p(mrb2, mrb_obj_value(mrb2->exc));]
-            f.puts %Q[    exit(0);]
+            f.puts %Q[    exit(EXIT_FAILURE);]
             f.puts %Q[  }]
             f.puts %Q[  ]
 

tools/mirb/mirb.c

@@ -172,11 +172,11 @@ parse_args(mrb_state *mrb, int argc, char **argv, struct _args *args)
     case '-':
       if (strcmp((*argv) + 2, "version") == 0) {
         mrb_show_version(mrb);
-        exit(0);
+        exit(EXIT_SUCCESS);
       }
       else if (strcmp((*argv) + 2, "copyright") == 0) {
         mrb_show_copyright(mrb);
-        exit(0);
+        exit(EXIT_SUCCESS);
       }
       else return -3;
     default:

tools/mrbc/mrbc.c

@@ -115,7 +115,7 @@ parse_args(mrb_state *mrb, int argc, char **argv, struct _args *args)
       case '-':
         if (strcmp((*argv) + 2, "version") == 0) {
           mrb_show_version(mrb);
-          exit(0);
+          exit(EXIT_SUCCESS);
         }
         else if (strcmp((*argv) + 2, "verbose") == 0) {
           args->verbose = 1;
@@ -123,7 +123,7 @@ parse_args(mrb_state *mrb, int argc, char **argv, struct _args *args)
         }
         else if (strcmp((*argv) + 2, "copyright") == 0) {
           mrb_show_copyright(mrb);
-          exit(0);
+          exit(EXIT_SUCCESS);
         }
         result = -3;
         goto exit;

tools/mruby/mruby.c

@@ -115,7 +115,7 @@ append_cmdline:
     case '-':
       if (strcmp((*argv) + 2, "version") == 0) {
         mrb_show_version(mrb);
-        exit(0);
+        exit(EXIT_SUCCESS);
       }
       else if (strcmp((*argv) + 2, "verbose") == 0) {
         args->verbose = 1;
@@ -123,7 +123,7 @@ append_cmdline:
       }
       else if (strcmp((*argv) + 2, "copyright") == 0) {
         mrb_show_copyright(mrb);
-        exit(0);
+        exit(EXIT_SUCCESS);
       }
       else return -3;
     default: