libxl: Introduce libxl__fd_set_cloexec

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/tools/libxl/libxl_internal.c b/tools/libxl/libxl_internal.c
index e2592789ce..8f4678020f 100644
--- a/tools/libxl/libxl_internal.c
+++ b/tools/libxl/libxl_internal.c
@@ -242,3 +242,16 @@ int libxl__file_reference_unmap(libxl_file_reference *f)
 
 	return ERROR_FAIL;
 }
+
+int libxl__fd_set_cloexec(int fd)
+{
+    int flags = 0;
+
+    if ((flags = fcntl(fd, F_GETFD)) == -1) {
+        flags = 0;
+    }
+    if ((flags & FD_CLOEXEC)) {
+        return 0;
+    }
+    return fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
+}