Special case when oldfd and newfd are identical and are the standard
input, output or error as this makes Windows XP hangs.
Tested on x86_64-pc-linux-gnu, committed on trunk
2011-11-21 Pascal Obry <[email protected]>
* adaint.c (__gnat_dup2): When fd are stdout, stdin or stderr and
identical, do nothing on Windows XP.
Index: adaint.c
===================================================================
--- adaint.c (revision 181556)
+++ adaint.c (working copy)
@@ -2449,6 +2449,14 @@
/* Not supported on VxWorks 5.x, but supported on VxWorks 6.0 when using
RTPs. */
return -1;
+#elif defined (_WIN32)
+ /* Special case when oldfd and newfd are identical and are the standard
+ input, output or error as this makes Windows XP hangs. Note that we
+ do that only for standard file descriptors that are known to be valid. */
+ if (oldfd == newfd && newfd >= 0 && newfd <= 2)
+ return newfd;
+ else
+ return dup2 (oldfd, newfd);
#else
return dup2 (oldfd, newfd);
#endif
