From bd220b9b14df46628e28fbd3643fe5625d3c3188 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Sat, 7 Apr 2018 11:17:28 -0400
Subject: [PATCH] Parse after preprocessing

---
 src/main.c | 29 ++++++++++++++++++++++++-----
 1 file changed, 24 insertions(+), 5 deletions(-)

diff --git a/src/main.c b/src/main.c
index 3c24729..ce0f85e 100644
--- a/src/main.c
+++ b/src/main.c
@@ -4,15 +4,25 @@
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <stdbool.h>
 
-void preprocess(const char * input_fname)
+static char preprocessed_fname[] = "/tmp/cxlppXXXXXX";
+static bool preprocessed_fname_created = false;
+
+bool preprocess(const char * input_fname)
 {
-    char fname[] = "/tmp/cxlppXXXXXX";
-    int fd = mkstemp(fname);
+    int fd = mkstemp(preprocessed_fname);
+    if (fd < 0)
+    {
+        perror("mkstemp");
+        return false;
+    }
+    preprocessed_fname_created = true;
     pid_t pid = fork();
     if (pid < 0)
     {
         perror("fork");
+        return false;
     }
     else if (pid == 0)
     {
@@ -24,13 +34,22 @@ void preprocess(const char * input_fname)
     {
         close(fd);
         waitpid(pid, NULL, 0);
-        unlink(fname);
     }
+    return true;
 }
 
 int main(int argc, char * argv[])
 {
-    preprocess(argv[1]);
+    bool preprocess_successful = preprocess(argv[1]);
+    if (preprocess_successful)
+    {
+        parse(preprocessed_fname);
+    }
+    /* Clean up temporary files. */
+    if (preprocessed_fname_created)
+    {
+        unlink(preprocessed_fname);
+    }
 
     return 0;
 }