use EXIT_SUCCESS and EXIT_FAILURE for exit status; close #1142

3 files changed, 6 insertions, 6 deletions

diff --git a/tools/mirb/mirb.c b/tools/mirb/mirb.c
index 3f96696a7..dff2f76ab 100644
--- a/tools/mirb/mirb.c
+++ b/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:
diff --git a/tools/mrbc/mrbc.c b/tools/mrbc/mrbc.c
index b8c1cf286..a494a2cde 100644
--- a/tools/mrbc/mrbc.c
+++ b/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;
diff --git a/tools/mruby/mruby.c b/tools/mruby/mruby.c
index 47727e67b..d7ee93a88 100644
--- a/tools/mruby/mruby.c
+++ b/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: