#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?

#define?START???0
#define?CAMERO_LCD???1
#define?CAMERO_GRAB????2
#define?DISPLAY_MP3??????4
#define?DISPLAY_MP3_CAMERO_LCD???5??

#define?START_X?execl（“/opt/cat_eyes/jpeg_lcd“?“jpeg_lcd“?“/opt/cat_eyes/picture/chushihua.jpg“?NULL）
#define?START_ABSENCE_X?execl（“/opt/cat_eyes/jpeg_lcd“?“jpeg_lcd“?“/opt/cat_eyes/picture/miqi.jpg“?NULL）
#define?START_LUXIANG_X?execl（“/opt/cat_eyes/jpeg_lcd“?“jpeg_lcd“?“/opt/cat_eyes/picture/luxiang.jpg“?NULL）

#define?CAMERO_LCD_X?execl（“/opt/cat_eyes/jpeg_display“?“jpeg_display“?NULL）
#define?DISPLAY_MP3_X?execl（“/usr/bin/madplay“?“madplay“?“/opt/cat_eyes/1.mp3“?NULL）
#define?CAMERO_GRAB_X?execl（“/opt/cat_eyes/grab“?“grab“?NULL）?

int?absence?=?0;??????????????//外出標志?????????????????
int?stat_val;
int?flag?=?START;?????????????????//標志位
int?buttons_fd;????????????//按鍵的設備文件描述符
int?key_value;????????????//鍵值
pthread_t?thread_id;
pid_t?pid_kill;???????????//將要殺掉的進程的ID

pid_t?pid_child;

void?key1_process（）
{
??if（absence?==?0）
????{
??????if（flag?==?START）?????????
????????{
??????????pid_child?=?fork（）;
??????????if（pid_child?????????????{
?????????????perror（“Process?creation?failed\n“）;
?????????????exit（1）;?
????????????}?
???????????else?if（pid_child?==?0）
????????????{
???????????????DISPLAY_MP3_X;???????//執行MP3進程??
????????????}?
???????????else
????????????{
???????????????flag?=?DISPLAY_MP3;
???????????????kill（pid_killSIGINT）;
???????????????pid_kill?=?pid_child;????
???????????????waitpid（pid_kill?（int?*）0?0）;???
???????????????pid_child?=?fork（）;
???????????????if（pid_child?????????????????{
??????????????????perror（“Process?creation?failed\n“）;
??????????????????exit（1）;?
?????????????????}?
???????????????else?if（pid_child?==?0）
?????????????????{
???????????????????CAMERO_LCD_X;
?????????????????}
???????????????else
?????????????????{
????????????????????flag?=?DISPLAY_MP3_CAMERO_LCD;????
????????????????????pid_kill?=?pid_child;
????????????????????waitpid（pid_child?（int*）0?0）;???//等待DISPLAY_QT_X進程結束
????????????????????pid_child?=?fork（）;
????????????????????if（pid_child??????????????????????{
???????????????????????perror（“Process?creation?failed\n“）;
???????????????????????exit（1）;?
?????????????????????}?
???????????????????else?if（pid_child?==?0）
????????????????????{
???????????????????????START_X;;?????????
????????????????????}
???????????????????else
????????????????????{
???????????????????????flag?=?START;
???????????????????????pid_kill?=?pid_child;
????????????????????}
?????????????????}
????????????}
???????}
????}???
??else?if（absence?==?1）
???{
???????if（flag?==?START）?????????//如果不處于DISPLAY_MP3狀態
????????{
??????????pid_child?=?fork（）;
??????????if（pid_child?????????????{

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2012-08-17?10:45??v4l2采集顯示程序\
?????目錄???????????0??2012-08-17?10:45??v4l2采集顯示程序\cat_eyes\
?????文件???????10463??2010-09-16?17:40??v4l2采集顯示程序\cat_eyes\cat_eyes
?????文件????????9387??2010-09-16?17:40??v4l2采集顯示程序\cat_eyes\cat_eyes.c
?????目錄???????????0??2012-08-17?10:45??v4l2采集顯示程序\cat_eyes_main\
?????文件????????8277??2010-09-16?17:40??v4l2采集顯示程序\cat_eyes_main\cat_eyes_main
?????文件????????5613??2010-09-16?17:40??v4l2采集顯示程序\cat_eyes_main\cat_eyes_main.c
?????目錄???????????0??2012-08-17?10:45??v4l2采集顯示程序\date_time\
?????文件??????????11??2010-09-16?17:40??v4l2采集顯示程序\date_time\visitor_time_1
?????文件??????????12??2010-09-16?17:40??v4l2采集顯示程序\date_time\visitor_time_2
?????文件??????????12??2010-09-16?17:40??v4l2采集顯示程序\date_time\visitor_time_3
?????文件??????????12??2010-09-16?17:40??v4l2采集顯示程序\date_time\visitor_time_4
?????文件??????????12??2010-09-16?17:40??v4l2采集顯示程序\date_time\visitor_time_5
?????目錄???????????0??2012-08-17?10:45??v4l2采集顯示程序\grap\
?????文件???????12947??2010-09-16?17:40??v4l2采集顯示程序\grap\grab
?????文件????????5261??2010-09-16?17:40??v4l2采集顯示程序\grap\grab.c
?????文件????????5438??2010-09-16?17:40??v4l2采集顯示程序\grap\v4l.h
?????目錄???????????0??2012-08-17?10:45??v4l2采集顯示程序\jpeg_display\
?????文件???????14730??2010-09-16?17:40??v4l2采集顯示程序\jpeg_display\jpeg_display
?????文件????????1860??2010-09-16?17:40??v4l2采集顯示程序\jpeg_display\jpeg_display.c
?????文件????????3722??2010-09-16?17:40??v4l2采集顯示程序\jpeg_display\lcd.h
?????文件????????5438??2010-09-16?17:40??v4l2采集顯示程序\jpeg_display\v4l.h
?????目錄???????????0??2012-08-17?10:45??v4l2采集顯示程序\jpeg_lcd\
?????文件???????11002??2010-09-16?17:40??v4l2采集顯示程序\jpeg_lcd\jpeg_lcd
?????文件????????1648??2010-09-16?17:40??v4l2采集顯示程序\jpeg_lcd\jpeg_lcd.c
?????文件????????3722??2010-09-16?17:40??v4l2采集顯示程序\jpeg_lcd\lcd.h
?????目錄???????????0??2012-08-17?10:45??v4l2采集顯示程序\Qt_pic\
?????文件?????????261??2010-09-16?17:40??v4l2采集顯示程序\Qt_pic\main.cpp
?????文件????????1600??2010-09-16?17:40??v4l2采集顯示程序\Qt_pic\main.o
?????文件????????9515??2010-09-16?17:40??v4l2采集顯示程序\Qt_pic\Makefile
?????文件???????????0??2010-09-16?17:40??v4l2采集顯示程序\Qt_pic\moc_Qt_pic.cpp
............此處省略20個文件信息