libc: Handle dup2 with two equal arguments

2013-02-21 16:39:46 +01:00 · 2013-02-21 16:39:46 +01:00 · 1009d00168
parent fbd4b5f6df
commit 1009d00168
1 changed files with 3 additions and 0 deletions
--- a/libports/src/lib/libc/file_operations.cc
+++ b/libports/src/lib/libc/file_operations.cc
@ -340,6 +340,9 @@ extern "C" int _dup2(int libc_fd, int new_libc_fd)
 	if (!fd || !fd->plugin)
 		return INVALID_FD;

+	if (libc_fd == new_libc_fd)
+		return libc_fd;
+
 	/*
 	 * Check if 'new_libc_fd' is already in use. If so, close it before
 	 * allocating it again.