次实例参数传递方法：’”$1″‘(单引号双引号变量双引号单引号)
- 需求：
#!/bin/sh
for file_name in `ls src`
do
echo ${file_name}
awk -F ";" '{if($4 == ?????) print}' ${file_name} >> list
done;我要检索src目录中的文件，对每一个文件进行分析，如果文件的第4个字段符合一定条件，比如说，第4个字段是”a123″，则将这些符合条件的记录保存 成另外一个文件；该条件，我想在整个shell脚本的$1参数地方体现。
如上脚本，我现在想在?????处引用该shell脚本的第一个 参数$1,请问，?????该怎么写？
- 解决办法1：调用’”${1}”‘参数
[root@manifold ~]# ls
anaconda-ks.cfg Desktop install.log install.log.syslog test2.sh test.sh
[root@manifold ~]# cat test.sh
#!/bin/sh
for file_name in `ls /root`
do
echo ${file_name}
awk -F ";" '{if($4 == '"${1}"') print}' ${file_name} >> list
done;
[root@manifold ~]# cat test2.sh
manifold;manifold2;manifold3;1234;end
[root@manifold ~]# ls
anaconda-ks.cfg Desktop install.log install.log.syslog test2.sh test.sh
[root@manifold ~]# sh test.sh 1234
anaconda-ks.cfg
Desktop
awk: cmd. line:1: fatal: file `Desktop' is a directory
install.log
install.log.syslog
test2.sh
test.sh
[root@manifold ~]# ls
anaconda-ks.cfg Desktop install.log install.log.syslog list test2.sh test.sh
[root@manifold ~]# cat list
manifold;manifold2;manifold3;1234;end- 解决办法2：使用Awk -v 参数
$ lf
awkvar* src/
$ cat awkvar
#! /bin/sh
files=`ls src/*`
for file_name in ${files}
do
awk -F ":" -v country=China '{ if($4 == country) print }' ${file_name}
done
$ ls src
software.txt whoiswho.txt
$ cat src/*
Microsoft:Windows:XP:USA
SCO:SCO Open Server:5.0.5:USA
Kingsoft:Power Dict:2006:China
Tongtech:TongLINK/Q:6.3:China
Bill Gates:Micosft:CEO:USA
Liu Chuanzhi:Lenovo:CEO:China
$ ./awkvar
Kingsoft:Power Dict:2006:China
Tongtech:TongLINK/Q:6.3:China
Liu Chuanzhi:Lenovo:CEO:China- 实例扩展
#! /bin/sh
for f in "`ls src/*`"
do
awk -F ":" '$4 == "'"$1"'" || $2 == "'"$2"'" { print }' ${f}