CTDP linux 程序员手册 (4.9) 一个 makefile 脚本的例子

Linux 脚本实例
一个 makefile 脚本的例子
脚本化对一个文件进行检查并且如果需要则进行相应的修改。由于它来自于一个makefile, 这个文件类似于一个普通的脚本，带有 ";/"结束符的行表示进行了少量修改。这段内容解释了对rc.local文件的编辑来自于一个 makefile 脚本程序， "printst", 当系统启动的式后可以再后台运行。变量 "BINLOC" 提前在行 "BINLOC = /usr/local/tmp"中定义。可查看在"Making makefiles"开头有关"Making Packages" 的部分。

# 将路径 $(BINLOC)添加到 /etc/rc.d/rc.local 文件内

@PATHIN=`grep "path=" /etc/rc.d/rc.local | grep "$(BINLOC)"`; / # 查看 BINLOC 路径是否被设置在 rc.local 文件内

HEADER=""; /

if /

[ -z "$PATHIN" ]; /

then /

echo Adding $(BINLOC) to path in /etc/rc.d/rc.local; /

echo >> /etc/rc.d/rc.local; /

echo "###### Added by Print Service Install on `date` by `whoami`" >> /etc/rc.d.rc.local; /

HEADER=Y; /

echo "export PATH=/$PATH:$(BINLOC)" >> /etc/rc.d.rc.local; /

else /

echo $(BINLOC) already set in path in file /etc/rc.d/rc.local; /

fi; /

PRINTST=`grep -i "printst &" /etc/rc.d/rc.local`; / # 查看字符串 printst 是否在文件rc.local 内

if /

[ -z "$PRINTST" ]; /

then /

echo Adding printst command to /etc/rc.d/rc.local file; /

   if /

[ -z "$HEADER" ]; /

   then /

echo >> /etc/rc.d.rc.local; /

   echo "###### Added by Print Service Install on `date` by `whoami`" >> /etc/rc.d.rc.local; /

   HEADER=Y; /

   fi; /

echo "printst &" >> /etc/rc.d.rc.local; /

else /

echo Already have printst command in /etc/rc.d/rc.local file; /

fi; /

if /

[ -n "$HEADER" ]; /

then /

echo "###### End of Print Service Install Section ######" >> /etc/rc.d.rc.local; /

echo >> /etc/rc.d.rc.local; /

fi;