* include/ruby/intern.h (rb_cloexec_dup2): declared.

* io.c (rb_cloexec_dup2): new function.
  (io_reopen): use rb_cloexec_dup2.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33557 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,10 @@
+Sat Oct 29 22:06:37 2011  Tanaka Akira  <akr@fsij.org>
+
+	* include/ruby/intern.h (rb_cloexec_dup2): declared.
+
+	* io.c (rb_cloexec_dup2): new function.
+	  (io_reopen): use rb_cloexec_dup2.
+
 Sat Oct 20 21:08:18 2011  Tajima Akil <artonx@yahoo.co.jp>
 
 	* win32/Makefile.sub (CONFIG_H): have stdint.h if VC2010.

include/ruby/intern.h

@@ -504,6 +504,7 @@ int rb_pipe(int *pipes);
 int rb_reserved_fd_p(int fd);
 int rb_cloexec_open(const char *pathname, int flags, mode_t mode);
 int rb_cloexec_dup(int oldfd);
+int rb_cloexec_dup2(int oldfd, int newfd);
 #define RB_RESERVED_FD_P(fd) rb_reserved_fd_p(fd)
 void rb_update_max_fd(int fd);
 void rb_fd_set_cloexec(int fd);

io.c

@@ -227,6 +227,17 @@ rb_cloexec_dup(int oldfd)
     return ret;
 }
 
+int
+rb_cloexec_dup2(int oldfd, int newfd)
+{
+    int ret;
+
+    ret = dup2(oldfd, newfd);
+    if (ret == -1) return -1;
+    fd_set_cloexec(ret);
+    return ret;
+}
+
 #define argf_of(obj) (*(struct argf *)DATA_PTR(obj))
 #define ARGF argf_of(argf)
 
@@ -5870,17 +5881,17 @@ io_reopen(VALUE io, VALUE nfile)
     if (fd != fd2) {
 	if (IS_PREP_STDIO(fptr) || fd <= 2 || !fptr->stdio_file) {
 	    /* need to keep FILE objects of stdin, stdout and stderr */
-	    if (dup2(fd2, fd) < 0)
+	    if (rb_cloexec_dup2(fd2, fd) < 0)
 		rb_sys_fail_path(orig->pathv);
-            rb_fd_set_cloexec(fd);
+            rb_update_max_fd(fd);
 	}
 	else {
             fclose(fptr->stdio_file);
             fptr->stdio_file = 0;
             fptr->fd = -1;
-            if (dup2(fd2, fd) < 0)
+            if (rb_cloexec_dup2(fd2, fd) < 0)
                 rb_sys_fail_path(orig->pathv);
-            rb_fd_set_cloexec(fd);
+            rb_update_max_fd(fd);
             fptr->fd = fd;
 	}
 	rb_thread_fd_close(fd);