2016-05-23

Author: fengyuhetao

gawk进阶/gawk函数库

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+function myprint()
+{
+	printf "%-16s - %s", $1, $4
+}
+
+function myrand(limit)
+{
+	return int(limit * rand())
+}
+

gawk进阶/gawk脚本

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+#!/bin/bash
+
+BEGIN{FS="\n"; RS=""}
+{
+	myprint()
+}

gawk进阶/new

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+#!/bin/bash
+
+for (( i=1; i<=4; i++ ))
+do
+	touch $i.sh
+	chmod 764 $i.sh
+	echo "#!/bin/bash" > $i.sh
+done

gawk进阶/script

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+BEGIN{FS=","; print n}
+{print $n}

gawk进阶/test

@@ -0,0 +1,4 @@
+10
+5
+123
+50

gawk进阶/使用变量.sh

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+#!/bin/bash
+#使用内建变量
+
+gawk 'BEGIN {testing="This is a test";  print testing; testing=45;  print testing}'
+
+#处理数字值
+
+gawk 'BEGIN{x=4; x= x*2+3; printx}'
+
+#处理数组
+gawk 'BEGIN{capital["Ill"] = "SprintField"; print capital["Ill"]}'
+
+#遍历数组变量
+gawk 'BEGIN{
+var["a"] = 1
+var["g"] = 2
+var["m"] = 3
+for( test in var)
+{
+	print "Index:",test,"- Value:",var[test]
+}
+}'
+
+print "------"
+
+#删除数组变量
+gawk 'BEGIN{
+var["a"] = 1
+var["g"] = 2
+for (test in var)
+{
+	print "Index:",test," - Value:", var[test]
+}
+delete var["g"]
+
+print "----"
+
+for (test in var)
+{
+	print "Index;",test," - Value:", var[test]
+}
+}'

gawk进阶/使用模式，机构化命令.sh

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+#!/bin/bash
+#正则表达式
+
+gawk 'BEGIN{FS=","} 
+/11/{print $1}
+' test
+
+#if-else语句
+gawk '{
+if($1 > 20)
+{
+	x=$1*20
+	print x
+}
+else
+{
+	x=$1/2
+	print x
+}
+}' test
+
+#while 语句
+gawk '{
+total = 0
+i=1
+while(i<4)
+{
+	total+=$i
+	i++
+}
+avg = total/3
+print "Average:".avg
+}' test
+
+
+#do-while语句
+gawk '{
+total=0
+i=1
+do
+{
+	total += $i
+	i++
+}while(total < 150)
+print total }' test
+
+
+#for语句
+gawk '{
+total = 0
+for (i=1; i<4; i++)
+{
+	total+=$i
+}
+avg = total/3
+print "Average:".avg
+}' test

gawk进阶/自定义函数.sh

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+#!/bin/bash
+#gawk 自定义函数
+
+gawk '
+function myprint()
+{
+	printf "%-16s - %s\n", $1, $4
+}
+BEGIN{FS="\n"; RS=""}
+{
+	myprint()
+}' test

gawk进阶/调用函数库和脚本.sh

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+#!/bin/bash
+
+#使用函数库和gawk脚本
+
+gawk -f gawk函数库 -f gawk脚本 test

mysql数据库/向数据库中插入数据.sh

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+#!/bin/bash
+# send data to the the table in the MYSQL database
+
+MYSQL=`which mysql`
+
+if [ $# -ne 2 ]
+then
+	echo "Usage:mtest2 emplid lastname firstname salary"
+else
+	#脚本变量一定要用双引号，字符串变量使用单引号
+	statement=" insert into em_admin values(NULL, '$1', $2)"
+	$MYSQL emwjs -u test <<EOF
+	$statement
+EOF
+	if [ $? -eq 0 ]
+	then
+		echo Data successfully added
+	else
+		echo Problem adding data
+	fi
+fi