posix_devctl - Add support for SOCKCLOSE

The FACE Technical Standard, Edition 3.0 and later require the definition
of the subcommand SOCKCLOSE in <devctl.h>.

Reference: ​https://www.opengroup.org/face

closes #3856.

1 files changed, 15 insertions, 1 deletions

diff --git a/cpukit/libcsupport/src/posix_devctl.c b/cpukit/libcsupport/src/posix_devctl.c
index 415b94e278..0646ee4356 100644
--- a/cpukit/libcsupport/src/posix_devctl.c
+++ b/cpukit/libcsupport/src/posix_devctl.c
@@ -1,5 +1,6 @@
 /*
- * Copyright (c) 2016 Joel Sherrill <joel@rtems.org>.  All rights reserved.
+ * Copyright (c) 2016, 2020 Joel Sherrill <joel@rtems.org>.
+ * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -33,6 +34,8 @@
 #include <sys/ioctl.h>
 #include <rtems/seterr.h>
 
+#include  <unistd.h>
+
 int posix_devctl(
   int              fd,
   int              dcmd,
@@ -68,5 +71,16 @@ int posix_devctl(
     *dev_info_ptr = 0;
   }
 
+  /*
+   * The FACE Technical Standard Edition 3.0 and newer requires the SOCKCLOSE
+   * ioctl command. This is because the Security Profile does not include
+   * close() and applications need a way to close sockets. Closing sockets is
+   * a minimum requirement so using close() in the implementation meets that
+   * requirement but also lets the application close other file types.
+   */
+  if (dcmd == SOCKCLOSE ) {
+    return close(fd);
+  }
+
   return ioctl(fd, dcmd, dev_data_ptr);
 }