Removed missing/dup2.c

This function should be always available, as POSIX-compliant or
Windows platform are required since 1.9.  Also the code in this
file is MT-unsafe.

1 files changed, 0 insertions, 60 deletions

diff --git a/missing/dup2.c b/missing/dup2.c
deleted file mode 100644
index 7f2b78c10f..0000000000
--- a/missing/dup2.c
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Public domain dup2() lookalike
- * by Curtis Jackson @ AT&T Technologies, Burlington, NC
- * electronic address:  burl!rcj
- *
- * dup2 performs the following functions:
- *
- * Check to make sure that fd1 is a valid open file descriptor.
- * Check to see if fd2 is already open; if so, close it.
- * Duplicate fd1 onto fd2; checking to make sure fd2 is a valid fd.
- * Return fd2 if all went well; return BADEXIT otherwise.
- */
-
-#include "ruby/internal/config.h"
-
-#if defined(HAVE_FCNTL)
-# include <fcntl.h>
-#endif
-
-#if !defined(HAVE_FCNTL) || !defined(F_DUPFD)
-# include <errno.h>
-#endif
-
-#define BADEXIT -1
-
-int
-dup2(int fd1, int fd2)
-{
-#if defined(HAVE_FCNTL) && defined(F_DUPFD)
-	if (fd1 != fd2) {
-#ifdef F_GETFL
-		if (fcntl(fd1, F_GETFL) < 0)
-			return BADEXIT;
-		if (fcntl(fd2, F_GETFL) >= 0)
-			close(fd2);
-#else
-		close(fd2);
-#endif
-		if (fcntl(fd1, F_DUPFD, fd2) < 0)
-			return BADEXIT;
-	}
-	return fd2;
-#else
-	extern int errno;
-	int i, fd, fds[256];
-
-	if (fd1 == fd2) return 0;
-	close(fd2);
-	for (i=0; i<256; i++) {
-		fd = fds[i] = dup(fd1);
-		if (fd == fd2) break;
-	}
-	while (i) {
-	    	close(fds[i--]);
-	}
-	if (fd == fd2) return 0;
-	errno = EMFILE;
-	return BADEXIT;
-#endif
-}