Add support for posix_devctl()

3 files changed, 76 insertions, 1 deletions

diff --git a/cpukit/libcsupport/Makefile.am b/cpukit/libcsupport/Makefile.am
index bf78fa0c65..559ad81446 100644
--- a/cpukit/libcsupport/Makefile.am
+++ b/cpukit/libcsupport/Makefile.am
@@ -138,7 +138,8 @@ libcsupport_a_SOURCES += src/printertask.c
 libcsupport_a_SOURCES += $(LIBC_GLUE_C_FILES) $(PASSWORD_GROUP_C_FILES) \
     $(TERMINAL_IDENTIFICATION_C_FILES) $(SYSTEM_CALL_C_FILES) \
     $(DIRECTORY_SCAN_C_FILES) $(ID_C_FILES) src/envlock.c \
-    $(TERMIOS_C_FILES) src/getpagesize.c src/getrusage.c
+    $(TERMIOS_C_FILES) src/getpagesize.c src/getrusage.c src/posix_devctl.c
+
 
 libcsupport_a_SOURCES += src/flockfile.c src/funlockfile.c src/ftrylockfile.c
 
diff --git a/cpukit/libcsupport/src/posix_devctl.c b/cpukit/libcsupport/src/posix_devctl.c
new file mode 100644
index 0000000000..9b86e0e059
--- /dev/null
+++ b/cpukit/libcsupport/src/posix_devctl.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2016 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
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#define _POSIX_26_C_SOURCE
+
+#include <devctl.h>
+#include <sys/ioctl.h>
+#include <rtems/seterr.h>
+
+int posix_devctl(
+  int            fd,
+  int            dcmd,
+  void *restrict dev_data_ptr,
+  size_t         nbyte,
+  int *restrict  dev_info_ptr
+)
+{
+  /*
+   * The POSIX 1003.26 standard allows for library implementations
+   * that implement posix_devctl() using ioctl(). In this case,
+   * the extra parameters are largely ignored.
+   *
+   * The FACE Technical Standard requires only that FIONBIO
+   * be supported for sockets.
+   *
+   * This method appears to be rarely implemented and there are
+   * no known required use cases for this method beyond those
+   * from the FACE Technical Standard.
+   */
+
+  /*
+   * POSIX 1003.26 mentions that nbyte must be non-negative but this
+   * doesn't make sense because size_t is guaranteed to be unsigned.
+   */
+
+  /*
+   * Since this is implemented on top of ioctl(), the device information
+   * is not going to be passed down. Fill it in with zero so the behavior
+   * is defined.
+   */
+  if (dev_info_ptr != NULL) {
+    *dev_info_ptr = 0;
+  }
+
+  return ioctl(fd, dcmd, dev_data_ptr);
+}
diff --git a/cpukit/posix/src/sysconf.c b/cpukit/posix/src/sysconf.c
index 0e7b1e5305..c5f66f6f46 100644
--- a/cpukit/posix/src/sysconf.c
+++ b/cpukit/posix/src/sysconf.c
@@ -51,6 +51,8 @@ long sysconf(
       return (long) rtems_configuration_get_maximum_processors();
     case _SC_NPROCESSORS_ONLN:
       return (long) rtems_get_processor_count();
+    case _SC_POSIX_26_VERSION:
+      return (long) _POSIX_26_VERSION;
 #if defined(__sparc__)
     case 515: /* Solaris _SC_STACK_PROT */
       return 0;