Add internal API task_reparent(), used in posix_spawn(). Move libc/spawn/lib_ps.c to sched/task_posixspawn.c; Move libc/spawn/spawn.h to include/nuttx/spawn.h

git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5531 42af7a65-404d-4744-a932-0658087f49c3

2 files changed, 127 insertions, 3 deletions

diff --git a/nuttx/include/nuttx/spawn.h b/nuttx/include/nuttx/spawn.h
new file mode 100644
index 000000000..f84ae8355
--- /dev/null
+++ b/nuttx/include/nuttx/spawn.h
@@ -0,0 +1,121 @@
+/****************************************************************************
+ * include/nuttx/spawn.h
+ *
+ *   Copyright (C) 2013 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ *
+ ****************************************************************************/
+
+#ifndef __INCLUDE_NUTTX_SPAWN_H
+#define __INCLUDE_NUTTX_SPAWN_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <spawn.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Type Definitions
+ ****************************************************************************/
+/* This enumerator identifies a file action */
+
+enum spawn_file_actions_e
+{
+  SPAWN_FILE_ACTION_NONE = 0,
+  SPAWN_FILE_ACTION_CLOSE,
+  SPAWN_FILE_ACTION_DUP2,
+  SPAWN_FILE_ACTION_OPEN
+};
+
+/* posix_spawn_file_actions_addclose(), posix_spawn_file_actions_adddup2(),
+ * and posix_spawn_file_actions_addopen() will allocate memory and append
+ * a new file action to an instance of posix_spawn_file_actions_t.  The
+ * internal representation of these structures are defined below:
+ */
+
+struct spawn_general_file_action_s
+{
+  FAR struct spawn_general_file_action_s *flink;  /* Supports a singly linked list */
+  enum spawn_file_actions_e action;               /* A member of enum spawn_file_actions_e */
+};
+
+struct spawn_close_file_action_s
+{
+  FAR struct spawn_general_file_action_s *flink;  /* Supports a singly linked list */
+  enum spawn_file_actions_e action;               /* SPAWN_FILE_ACTION_CLOSE */
+  int fd;                                         /* The file descriptor to close */
+};
+
+struct spawn_dup2_file_action_s
+{
+  FAR struct spawn_general_file_action_s *flink;  /* Supports a singly linked list */
+  enum spawn_file_actions_e action;               /* SPAWN_FILE_ACTION_DUP2 */
+  int fd1;                                        /* The first file descriptor for dup2() */
+  int fd2;                                        /* The second file descriptor for dup2() */
+};
+
+struct spawn_open_file_action_s
+{
+  FAR struct spawn_general_file_action_s *flink;  /* Supports a singly linked list */
+  enum spawn_file_actions_e action;               /* SPAWN_FILE_ACTION_OPEN */
+  int fd;                                         /* The file descriptor after opening */
+  int oflags;                                     /* Open flags */
+  mode_t mode;                                    /* File creation mode */
+  char path[1];                                   /* Start of the path to be
+                                                   * opened */
+};
+
+#define SIZEOF_OPEN_FILE_ACTION_S(n) \
+  (sizeof(struct spawn_open_file_action_s) + (n))
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+void add_file_action(FAR posix_spawn_file_actions_t *file_action,
+                     FAR struct spawn_general_file_action_s *entry);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __INCLUDE_NUTTX_SPAWN_H */
diff --git a/nuttx/include/signal.h b/nuttx/include/signal.h
index 30726105b..7c6b4cd55 100644
--- a/nuttx/include/signal.h
+++ b/nuttx/include/signal.h
@@ -61,14 +61,17 @@
 
 /* All signals are "real time" signals */
 
-#define SIGRTMIN        0  /* First real time signal */
-#define SIGRTMAX        31 /* Last real time signal */
+#define SIGRTMIN        MIN_SIGNO  /* First real time signal */
+#define SIGRTMAX        MAX_SIGNO  /* Last real time signal */
 
 /* A few of the real time signals are used within the OS.  They have
  * default values that can be overridden from the configuration file. The
  * rest are all user signals.
  *
- * These are semi-standard signal definitions:
+ * The signal number zero is wasted for the most part.  It is a valid
+ * signal number, but has special meaning at many interfaces (e.g., Kill()).
+ *
+ * These are the semi-standard signal definitions:
  */
 
 #ifndef CONFIG_SIG_SIGUSR1