1 files changed, 33 insertions, 7 deletions
diff --git a/usertests.c b/usertests.c
index 62eefda..37540db 100644
--- a/usertests.c
+++ b/usertests.c
@@ -1,22 +1,48 @@
 // simple fork and pipe read/write
 
-char buf[32];
+char buf[2048];
 
 void
 pipe1()
 {
   int fds[2], pid;
+  int seq = 0, i, n, cc, total;
 
   pipe(fds);
-  pid = pipe();
+  pid = fork();
   if(pid == 0){
-    write(fds[1], "xyz", 4);
+    close(fds[0]);
+    for(n = 0; n < 5; n++){
+      for(i = 0; i < 1033; i++)
+        buf[i] = seq++;
+      if(write(fds[1], buf, 1033) != 1033){
+        puts("pipe1 oops 1\n");
+        exit(1);
+      }
+    }
+    exit(0);
   } else {
-    read(fds[0], buf, sizeof(buf));
-    if(buf[0] != 'x' || buf[1] != 'y'){
-      puts("pipe1 oops\n");
-      return;
+    close(fds[1]);
+    total = 0;
+    cc = 1;
+    while(1){
+      n = read(fds[0], buf, cc);
+      if(n < 1)
+        break;
+      for(i = 0; i < n; i++){
+        if((buf[i] & 0xff) != (seq++ & 0xff)){
+          puts("pipe1 oops 2\n");
+          return;
+        }
+      }
+      total += n;
+      cc = cc * 2;
+      if(cc > sizeof(buf))
+        cc = sizeof(buf);
     }
+    if(total != 5 * 1033)
+      puts("pipe1 oops 3\n");
+    close(fds[0]);
   }
   puts("pipe1 ok\n");
 }