1 files changed, 33 insertions, 0 deletions
diff --git a/test/fork.awk b/test/fork.awk
new file mode 100644
index 00000000..0b29f9ff
--- /dev/null
+++ b/test/fork.awk
@@ -0,0 +1,33 @@
+@load "fork"
+
+BEGIN {
+   fn = ("fork.tmp." PROCINFO["pid"])
+   switch (pid = fork()) {
+   case -1:
+      printf "Error: fork failed with ERRNO %s\n", ERRNO
+      exit 1
+   case 0:
+      # child
+      printf "pid %s ppid %s\n", PROCINFO["pid"], PROCINFO["ppid"] > fn
+      exit 0
+   default:
+      # parent
+      erc = 1
+      if ((rc = wait()) < 0)
+	 printf "Error: wait failed with ERRNO %s\n", ERRNO
+      else if (rc != pid)
+	 printf "Error: wait returned %s instead of child pid %s\n", rc, pid
+      else if ((getline x < fn) != 1)
+	 printf "Error: getline failed on temp file %s\n", fn
+      else {
+	 expected = ("pid " pid " ppid " PROCINFO["pid"])
+	 if (x != expected)
+	    printf "Error: child data (%s) != expected (%s)\n", x, expected
+	 else if ((rc = system("rm  " fn)) != 0)
+	    printf "Error removing temp file %s with ERRNO %s\n", fn, ERRNO
+	 else
+	    erc = 0
+      }
+      exit erc
+   }
+}