From 7cf5bfe38b8345b2466d3ef7ba7d06040dc57e9d Mon Sep 17 00:00:00 2001
From: "Alex Xu (Hello71)" <alex_y_xu@yahoo.ca>
Date: Wed, 16 Aug 2017 20:48:34 -0400
Subject: Improve C example.

---
 .gitignore |  1 +
 Makefile   | 10 +++++++++-
 example.c  |  6 +++++-
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/.gitignore b/.gitignore
index 0ac38cb..c8df796 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /inhibit-screensaver
+/c-example
 *.o
diff --git a/Makefile b/Makefile
index 699b2a1..685a684 100644
--- a/Makefile
+++ b/Makefile
@@ -3,13 +3,21 @@ bindir := $(prefix)/bin
 CFLAGS += $(shell pkg-config --cflags dbus-1) -Wall -Wextra -std=c99
 LDLIBS := $(shell pkg-config --libs dbus-1)
 
+all: inhibit-screensaver c-example
 inhibit-screensaver: inhibit-screensaver.o
 
+c-example: c-example.o
+
+c-example.o: example.c
+	$(COMPILE.c) $(OUTPUT_OPTION) $<
+
 clean:
-	$(RM) inhibit-screensaver.o inhibit-screensaver
+	$(RM) inhibit-screensaver.o inhibit-screensaver c-example.o c-example
 
 install:
 	install -D -m0755 inhibit-screensaver $(bindir)
 
 uninstall:
 	$(RM) $(bindir)/inhibit-screensaver
+
+.PHONY: clean install uninstall
diff --git a/example.c b/example.c
index b822312..2eeac2d 100644
--- a/example.c
+++ b/example.c
@@ -1,3 +1,4 @@
+#define _DEFAULT_SOURCE
 #include <fcntl.h>
 #include <signal.h>
 #include <stdio.h>
@@ -22,11 +23,14 @@ int main() {
 
         // works even if process dies!
         kill(getpid(), SIGKILL);
+
+        // otherwise, release the inhibition:
+        close(pipefd[1]);
     } else {
         close(pipefd[1]);
-        close(0);
         dup2(pipefd[0], 0);
         execl("./inhibit-screensaver", "./inhibit-screensaver", "c-inhibitor-example", "testing", (char *)NULL);
+        perror("exec inhibit-screensaver");
         exit(1);
     }
 }
-- 
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