From 9e2354ec432f40e212e8d9ac54f1efb8567aef8b Mon Sep 17 00:00:00 2001
From: Guo Wenxue <guowenxue@gmail.com>
Date: Fri, 07 Dec 2018 20:50:07 +0800
Subject: [PATCH] Add IPC semaphore sample code, not finish yet

---
 ch1_fileIO/syserr.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/ch1_fileIO/syserr.c b/ch1_fileIO/syserr.c
index 75a34ac..22f775b 100644
--- a/ch1_fileIO/syserr.c
+++ b/ch1_fileIO/syserr.c
@@ -1,6 +1,7 @@
 
 #include <stdio.h>
 #include <errno.h>
+#include <unistd.h>
 #include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>

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