From 6ce020240b1dd356a32d3b1a2288f6efb98bf1f4 Mon Sep 17 00:00:00 2001
From: Elliott Pardee <me@elliottpardee.me>
Date: Fri, 12 Jun 2015 04:23:06 -0400
Subject: [PATCH] some error checking

---
 c/typeprint.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/c/typeprint.c b/c/typeprint.c
index 3c65c14..3af0605 100644
--- a/c/typeprint.c
+++ b/c/typeprint.c
@@ -2,6 +2,7 @@
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 static int process(char *name);
 
@@ -14,11 +15,16 @@ process(char *name)
         ts.tv_sec = 0;
         ts.tv_nsec = 10 * 1000000;
 
-        if (file == 0) {
+        if (access(file, F_OK) = -1) {
             fprintf(stderr, "[err] no such file or directory\n");
             return ENOENT;
         }
 
+        if (access(file, R_OK) = -1) {
+            fprintf(stderr, "[err] can't read file, permission denied\n");
+            return EACCES;
+        }
+
         int x;
         while ((x = fgetc(file)) != EOF) {
             printf("%c", x);