From bc84c9688b2e406cb4926bda42eb5bddf838fe33 Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Thu, 12 Nov 2020 19:45:09 -0500
Subject: add separate path for reading key from SHM

---
 readkey.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 readkey.c

diff --git a/readkey.c b/readkey.c
new file mode 100644
index 0000000..a7337b6
--- /dev/null
+++ b/readkey.c
@@ -0,0 +1,23 @@
+#define _XOPEN_SOURCE 700
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/shm.h>
+#include "deonebook.h"
+
+unsigned char *readkey(const char *path)
+{
+	key_t key = ftok(path, 0x2a);
+	if (key == (key_t)(-1)) {
+		perror("ftok");
+		return NULL;
+	}
+
+	int shmid = shmget(key, 0, 0);
+	if (shmid == -1) {
+		perror("shmget");
+		return NULL;
+	}
+
+	return shmat(shmid, NULL, 0);
+}
-- 
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