1 files changed, 326 insertions, 0 deletions
diff --git a/apps/examples/pipe/redirect_test.c b/apps/examples/pipe/redirect_test.c
new file mode 100644
index 000000000..45e86c356
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+++ b/apps/examples/pipe/redirect_test.c
@@ -0,0 +1,326 @@
+/****************************************************************************
+ * examples/pipe/redirect_test.c
+ *
+ *   Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sched.h>
+#include <semaphore.h>
+#include <errno.h>
+
+#include "pipe.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+#define READ_SIZE 37
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static sem_t g_rddone;
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: redirect_reader
+ ****************************************************************************/
+
+static int redirect_reader(int argc, char *argv[])
+{
+  char buffer[READ_SIZE];
+  int fdin;
+  int fdout;
+  int ret;
+  int nbytes = 0;
+ 
+  printf("redirect_reader: started with fdin=%s\n", argv[1]);
+
+  /* Convert the fdin to binary */
+
+  fdin  = atoi(argv[1]);
+  fdout = atoi(argv[2]);
+
+  /* Close fdout -- we don't need it */
+
+  ret = close(fdout);
+  if (ret != 0)
+    {
+       fprintf(stderr, "redirect_reader: failed to close fdout=%d\n", fdout);
+       return 1;
+    }
+
+  /* Re-direct the fdin to stdin */
+
+  ret = dup2(fdin, 0);
+  if (ret != 0)
+    {
+        fprintf(stderr, "redirect_reader: dup2 failed: %d\n", errno);
+        close(fdin);
+        return 2;
+    }
+
+  /* Close the original file descriptor */
+
+  ret = close(fdin);
+  if (ret != 0)
+    {
+       fprintf(stderr, "redirect_reader: failed to close fdin=%d\n", fdin);
+       return 3;
+    }
+
+  /* Then read from stdin until we hit the end of file */
+
+  fflush(stdout);
+  for (;;)
+    {
+      /* Read from stdin */
+
+      ret = read(0, buffer, READ_SIZE);
+      if (ret < 0 )
+        {
+           fprintf(stderr, "redirect_reader: read failed, errno=%d\n", errno);
+           return 4;
+        }
+      else if (ret == 0)
+        {
+          break;
+        }
+      nbytes += ret;
+
+      /* Echo to stdout */
+ 
+      ret = write(1, buffer, ret);
+      if (ret < 0)
+        {
+           fprintf(stderr, "redirect_reader: read failed, errno=%d\n", errno);
+           return 5;
+        }
+    }
+
+  printf("redirect_reader: %d bytes read\n", nbytes);
+  ret = close(0);
+  if (ret != 0)
+    {
+       fprintf(stderr, "redirect_reader: failed to close fd=0\n");
+       return 6;
+    }
+
+  sem_post(&g_rddone);
+  printf("redirect_reader: Returning success\n");
+  return 0;
+}
+
+/****************************************************************************
+ * Name: redirect_writer
+ ****************************************************************************/
+
+static int redirect_writer(int argc, char *argv[])
+{
+  int fdin;
+  int fdout;
+  int nbytes = 0;
+  int ret;
+ 
+  fprintf(stderr, "redirect_writer: started with fdout=%s\n", argv[2]);
+ 
+  /* Convert the fdout to binary */
+
+  fdin  = atoi(argv[1]);
+  fdout = atoi(argv[2]);
+
+  /* Close fdin -- we don't need it */
+
+  ret = close(fdin);
+  if (ret != 0)
+    {
+       fprintf(stderr, "redirect_reader: failed to close fdin=%d\n", fdin);
+       return 1;
+    }
+
+  /* Re-direct the fdout to stdout */
+
+  ret = dup2(fdout, 1);
+  if (ret != 0)
+    {
+        fprintf(stderr, "redirect_writer: dup2 failed: %d\n", errno);
+        return 2;
+    }
+
+  /* Close the original file descriptor */
+
+  ret = close(fdout);
+  if (ret != 0)
+    {
+       fprintf(stderr, "redirect_reader: failed to close fdout=%d\n", fdout);
+       return 3;
+    }
+
+  /* Then write a bunch of stuff to stdout */
+
+  fflush(stderr);
+  nbytes += printf("\nFour score and seven years ago our fathers brought forth on this continent a new nation,\n");
+  nbytes += printf("conceived in Liberty, and dedicated to the proposition that all men are created equal.\n");
+  nbytes += printf("\nNow we are engaged in a great civil war, testing whether that nation, or any nation, so\n");
+  nbytes += printf("conceived and so dedicated, can long endure. We are met on a great battle-field of that war.\n");
+  nbytes += printf("We have come to dedicate a portion of that field, as a final resting place for those who here\n");
+  nbytes += printf("gave their lives that that nation might live. It is altogether fitting and proper that we\n");
+  nbytes += printf("should do this.\n");
+  nbytes += printf("\nBut, in a larger sense, we can not dedicate - we can not consecrate - we can not hallow - this ground.\n");
+  nbytes += printf("The brave men, living and dead, who struggled here, have consecrated it, far above our poor power\n");
+  nbytes += printf("to add or detract. The world will little note, nor long remember what we say here, but it can\n");
+  nbytes += printf("never forget what they did here. It is for us the living, rather, to be dedicated here to the\n");
+  nbytes += printf("unfinished work which they who fought here have thus far so nobly advanced. It is rather for us to\n");
+  nbytes += printf("be here dedicated to the great task remaining before us - that from these honored dead we take\n");
+  nbytes += printf("increased devotion to that cause for which they gave the last full measure of devotion - that we\n");
+  nbytes += printf("here highly resolve that these dead shall not have died in vain - that this nation, under God,\n");
+  nbytes += printf("shall have a new birth of freedom - and that government of the people, by the people, for the\n");
+  nbytes += printf("people, shall not perish from the earth.\n\n");
+  fflush(stdout);
+
+  fprintf(stderr, "redirect_writer: %d bytes written\n", nbytes);
+
+  ret = close(1);
+  if (ret != 0)
+    {
+       fprintf(stderr, "redirect_writer: failed to close fd=1\n");
+       return 4;
+    }
+
+  fprintf(stderr, "redirect_writer: Returning success\n");
+  return 0;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: redirection_test
+ ****************************************************************************/
+
+int redirection_test(void)
+{
+  const char *argv[3];
+  char buffer1[8];
+  char buffer2[8];
+  int readerid;
+  int writerid;
+  int filedes[2];
+  int ret;
+
+  sem_init(&g_rddone, 0, 0);
+
+    /* Create the pipe */
+
+  ret = pipe(filedes);
+  if (ret < 0)
+    {
+      fprintf(stderr, "redirection_test: pipe failed with errno=%d\n", errno);
+      return 5;
+    }
+ 
+  sprintf(buffer1, "%d", filedes[0]);
+  argv[0] = buffer1;
+  sprintf(buffer2, "%d", filedes[1]);
+  argv[1] = buffer2;
+  argv[2] = NULL;
+
+  /* Start redirect_reader thread */
+
+  printf("redirection_test: Starting redirect_reader task with fd=%d\n", filedes[0]);
+  readerid = task_create("redirect_reader", 50, CONFIG_EXAMPLES_PIPE_STACKSIZE, redirect_reader, argv);
+  if (readerid < 0)
+    {
+      fprintf(stderr, "redirection_test: Failed to create redirect_writer task: %d\n", errno);
+      return 1;
+    }
+
+  /* Start redirect_writer task */
+
+  printf("redirection_test: Starting redirect_writer task with fd=%d\n", filedes[1]);
+  writerid = task_create("redirect_writer", 50, CONFIG_EXAMPLES_PIPE_STACKSIZE, redirect_writer, argv);
+  if (writerid < 0)
+    {
+      fprintf(stderr, "redirection_test: Failed to create redirect_writer task: %d\n", errno);
+      ret = task_delete(readerid);
+      if (ret != 0)
+        {
+          fprintf(stderr, "redirection_test: Failed to delete redirect_reader task %d\n", errno);
+        }
+      return 2;
+    }
+
+  /* We should be able to close the pipe file descriptors now. */
+
+  if (close(filedes[0]) != 0)
+    {
+      fprintf(stderr, "user_start: close failed: %d\n", errno);
+    }
+  if (close(filedes[1]) != 0)
+    {
+      fprintf(stderr, "user_start: close failed: %d\n", errno);
+    }
+
+  if (ret != 0)
+    {
+      fprintf(stderr, "user_start: PIPE test FAILED (%d)\n", ret);
+      return 6;
+    }
+
+  /* Wait for redirect_writer thread to complete */
+
+  printf("redirection_test: Waiting...\n");
+  fflush(stdout);
+  sem_wait(&g_rddone);
+
+  printf("redirection_test: returning %d\n", ret);
+  return ret;
+}
+