version.c: no exit in ruby_show_copyright

* include/ruby/backward.h (ruby_show_copyright_to_die): for source
  code backward compatibility.
* ruby.c (process_options): return Qtrue to exit the process
  successfully.
* version.c (ruby_show_copyright): no longer exit.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53446 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

6 files changed, 41 insertions, 4 deletions

diff --git a/ChangeLog b/ChangeLog
index 5942d0c02a..bfaf2ac69d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+Thu Jan  7 11:34:14 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* include/ruby/backward.h (ruby_show_copyright_to_die): for source
+	  code backward compatibility.
+
+	* ruby.c (process_options): return Qtrue to exit the process
+	  successfully.
+
+	* version.c (ruby_show_copyright): no longer exit.
+
 Wed Jan  6 17:22:53 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* lib/optparse.rb (OptionParser#order!): add `into` optional
diff --git a/NEWS b/NEWS
index 7384eb7931..d84c275087 100644
--- a/NEWS
+++ b/NEWS
@@ -30,6 +30,10 @@ with all sufficient information, see the ChangeLog file or Redmine
 
 === C API updates
 
+* ruby_show_version() will no longer exits the process, if
+  RUBY_SHOW_COPYRIGHT_TO_DIE is set to 0.  This will be the default in
+  the future.
+
 === Supported platform changes
 
 === Implementation improvements
diff --git a/include/ruby/backward.h b/include/ruby/backward.h
new file mode 100644
index 0000000000..4574cb98da
--- /dev/null
+++ b/include/ruby/backward.h
@@ -0,0 +1,20 @@
+#ifndef RUBY_RUBY_BACKWARD_H
+#define RUBY_RUBY_BACKWARD_H 1
+
+#ifndef RUBY_SHOW_COPYRIGHT_TO_DIE
+# define RUBY_SHOW_COPYRIGHT_TO_DIE 1
+#endif
+#if RUBY_SHOW_COPYRIGHT_TO_DIE
+/* for source code backward compatibility */
+DEPRECATED(static inline int ruby_show_copyright_to_die(int));
+static inline int
+ruby_show_copyright_to_die(int exitcode)
+{
+    ruby_show_copyright();
+    return exitcode;
+}
+#define ruby_show_copyright() /* defer EXIT_SUCCESS */ \
+    (exit(ruby_show_copyright_to_die(EXIT_SUCCESS)))
+#endif
+
+#endif /* RUBY_RUBY_BACKWARD_H */
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index 14fe7c3e16..7aabf5bd68 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -2206,6 +2206,10 @@ void ruby_sig_finalize(void);
 
 /*! @} */
 
+#if !defined RUBY_EXPORT && !defined RUBY_NO_OLD_COMPATIBILITY
+# include "ruby/backward.h"
+#endif
+
 RUBY_SYMBOL_EXPORT_END
 
 #if defined(__cplusplus)
diff --git a/ruby.c b/ruby.c
index 0a39bfba97..dfbf714f37 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1414,6 +1414,7 @@ process_options(int argc, char **argv, struct cmdline_options *opt)
     }
     if (opt->dump & DUMP_BIT(copyright)) {
 	ruby_show_copyright();
+	return Qtrue;
     }
 
     if (!opt->e_script) {
diff --git a/version.c b/version.c
index 6caf91226a..4c7b1abb40 100644
--- a/version.c
+++ b/version.c
@@ -96,12 +96,10 @@ ruby_show_version(void)
     fflush(stdout);
 }
 
-/*! Prints the copyright notice of the CRuby interpreter to stdout and \em exits
- *  this process successfully.
- */
+/*! Prints the copyright notice of the CRuby interpreter to stdout. */
 void
 ruby_show_copyright(void)
 {
     PRINT(copyright);
-    exit(EXIT_SUCCESS);
+    fflush(stdout);
 }