Add regex documentation.

[gnulib.git] / lib / dup2.c

diff --git a/lib/dup2.c b/lib/dup2.c
index ef581a7..a4422bf 100644 (file)
--- a/lib/dup2.c
+++ b/lib/dup2.c
@@ -52,6 +52,13 @@ rpl_dup2 (int fd, int desired_fd)
         }
       return fd;
     }
+  /* Wine 1.0.1 return 0 when desired_fd is negative but not -1:
+     http://bugs.winehq.org/show_bug.cgi?id=21289 */
+  if (desired_fd < 0)
+    {
+      errno = EBADF;
+      return -1;
+    }
 # endif
   result = dup2 (fd, desired_fd);
 # ifdef __linux__