about summary refs log tree commit diff
path: root/manual/examples
diff options
context:
space:
mode:
Diffstat (limited to 'manual/examples')
-rw-r--r--manual/examples/pipe.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/manual/examples/pipe.c b/manual/examples/pipe.c
index 054550fec6..92d339a7b9 100644
--- a/manual/examples/pipe.c
+++ b/manual/examples/pipe.c
@@ -5,7 +5,7 @@
 
 /* Read characters from the pipe and echo them to @code{stdout}.  */
 
-void 
+void
 read_from_pipe (int file)
 {
   FILE *stream;
@@ -18,7 +18,7 @@ read_from_pipe (int file)
 
 /* Write some random text to the pipe. */
 
-void 
+void
 write_to_pipe (int file)
 {
   FILE *stream;
@@ -35,7 +35,7 @@ main (void)
   int mypipe[2];
 
 /*@group*/
-  /* Create the pipe. */
+  /* Create the pipe.  */
   if (pipe (mypipe))
     {
       fprintf (stderr, "Pipe failed.\n");
@@ -43,23 +43,27 @@ main (void)
     }
 /*@end group*/
 
-  /* Create the child process. */
+  /* Create the child process.  */
   pid = fork ();
   if (pid == (pid_t) 0)
     {
-      /* This is the child process. */
+      /* This is the child process.
+	 Close other end first.  */
+      close (mypipe[1]);
       read_from_pipe (mypipe[0]);
       return EXIT_SUCCESS;
     }
   else if (pid < (pid_t) 0)
     {
-      /* The fork failed. */
+      /* The fork failed.  */
       fprintf (stderr, "Fork failed.\n");
       return EXIT_FAILURE;
     }
   else
     {
-      /* This is the parent process. */
+      /* This is the parent process.
+	 Close other end first.  */
+      close (mypipe[0]);
       write_to_pipe (mypipe[1]);
       return EXIT_SUCCESS;
     }