libstdc++: Use close-on-exec for file descriptors in filesystem::copy_file

libstdc++-v3/ChangeLog:

	* src/filesystem/ops-common.h (do_copy_file) [O_CLOEXEC]: Set
	close-on-exec flag on file descriptors.

diff --git a/libstdc++-v3/src/filesystem/ops-common.h b/libstdc++-v3/src/filesystem/ops-common.h
index 901f166514f2e7aa9cc7582e1ae9ba528fe1a214..f04bbc66d7d2c966736b602570b0417b439f4567 100644 (file)
--- a/libstdc++-v3/src/filesystem/ops-common.h
+++ b/libstdc++-v3/src/filesystem/ops-common.h
@@ -515,25 +515,26 @@ _GLIBCXX_BEGIN_NAMESPACE_FILESYSTEM
       int fd;
     };
 
-    int iflag = O_RDONLY;
+    int common_flags = 0;
+#ifdef O_CLOEXEC
+    common_flags |= O_CLOEXEC;
+#endif
 #ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
-    iflag |= O_BINARY;
+    common_flags |= O_BINARY;
 #endif
 
+    const int iflag = O_RDONLY | common_flags;
     CloseFD in = { posix::open(from, iflag) };
     if (in.fd == -1)
       {
        ec.assign(errno, std::generic_category());
        return false;
       }
-    int oflag = O_WRONLY|O_CREAT;
+    int oflag = O_WRONLY | O_CREAT | common_flags;
     if (options.overwrite || options.update)
       oflag |= O_TRUNC;
     else
       oflag |= O_EXCL;
-#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
-    oflag |= O_BINARY;
-#endif
     CloseFD out = { posix::open(to, oflag, S_IWUSR) };
     if (out.fd == -1)
       {