file descriptors

pipes

1 files changed, 30 insertions, 0 deletions

diff --git a/usertests.c b/usertests.c
new file mode 100644
index 0000000..62eefda
--- /dev/null
+++ b/usertests.c
@@ -0,0 +1,30 @@
+// simple fork and pipe read/write
+
+char buf[32];
+
+void
+pipe1()
+{
+  int fds[2], pid;
+
+  pipe(fds);
+  pid = pipe();
+  if(pid == 0){
+    write(fds[1], "xyz", 4);
+  } else {
+    read(fds[0], buf, sizeof(buf));
+    if(buf[0] != 'x' || buf[1] != 'y'){
+      puts("pipe1 oops\n");
+      return;
+    }
+  }
+  puts("pipe1 ok\n");
+}
+
+main()
+{
+  pipe1();
+
+  while(1)
+    ;
+}