生产环境上shell的解读

一直以来对shell都不是很熟悉,只停留在基本的linux上操作上,这周因为定位问题接触到了生产环境上的脚本,因此作为引子学习一下。很多命令只是点到,等真正需要独立完成的时候再去学习。

  1 #!/bin/sh
  2 
  3 #set -x 打印出调试信息
  4 MYNAME=rawload
  5 eamid=$2
  6 emsentityid=$1
  7 WORK_DIR=${PM4H_APP}/module/rawload
  8 LOAD_DIR=${PM4H_SPOOL}/${eamid}/${emsentityid}/load
  9 LOAD_BACKUP_DIR=${PM4H_SPOOL}/${eamid}/${emsentityid}/load_backup
 10 FILELIST=${PM4H_SPOOL}/${eamid}/${emsentityid}/etc/.rawloadfilelist
 11 
 12 #调用返回sql执行结果
 13 SQLEXECCMD="$JAVA -jar $NETWATCHER_HOME/pm4h2/app/lib/sqlexec.jar"
 14 
 15 16 PRESENTLIST=${PM4H_SPOOL}/${eamid}/${emsentityid}/etc/.presentlist
 17 LASTLIST=${PM4H_SPOOL}/${eamid}/${emsentityid}/etc/.lastlist
 18 CFORMATLIST=${PM4H_SPOOL}/${eamid}/${emsentityid}/etc/.cformatlist
 19 CDELETELIST=${PM4H_SPOOL}/${eamid}/${emsentityid}/etc/.cdeletelist
 20 FORMATEDLIST=${PM4H_SPOOL}/${eamid}/${emsentityid}/etc/.formatedlist
 21 
 22 pidfile=.$MYNAME.$eamid.$emsentityid.pid
 23 
 24 #test -f 命令可以判断文件是否存在
 25 if test -f ${WORK_DIR}/${pidfile}
 26 then
 27   # See if a process is running with that process id
 28   pid=`cat $WORK_DIR/$pidfile`
 29   
 30   # test -n 字符串的长度非0
 31   if test -n "$pid"
 32   then
 33      # 这句话的意思是:查看所有包含有$MYNAME关键字的进程,并且去掉grep本身进程,将输出结果按照空格分割,并打印如第二个参数,并从中查询包含了$pid的记录,输出到/dev/null(废弃)
 34      ps -ef|grep $MYNAME|grep -v grep|$AWK '{print $2}'|grep $pid > /dev/null
 35      # $? 表示上一次命令执行的结果值,测试上一次执行结果是否为0,0表示匹配成功,1表示失败
 36      if test $? -eq 0
 37      then
 38         # The process is running !
 39         echo "The process is running !"
 40         exit 3
 41      else
 42        # Try the ps listing again as it is not always reliable
 43        #ps -ef|grep $pid|grep $MYNAME > /dev/null
 44        ps -ef|grep $MYNAME|grep -v grep|$AWK '{print $2}'|grep $pid > /dev/null
 45        if test $? -eq 0
 46        then
 47             # The process is running !
 48             echo "The process is running !"
 49             exit 3
 50        fi
 51      fi
 52   fi
 53 fi
 54 
 55 # 将当前运行此脚本的进程号写入$pidfile
 56 echo $$ > $WORK_DIR/$pidfile
 57 # Check process is existence
 58 if [ ! -f ${WORK_DIR}/rawload.jar ] ; then
 59     printf "Error: Can not find the file ${WORK_DIR}/rawload.jar\n"
 60     return 2
 61 fi
 62 
 63 #每次处理个数默认是1000,数据库中的配置
 64 pifcounter=""
 65 
 66 #get pif files' number to batch load
 67 sql="select t.parametervalue from pm4h_ad.cfg_sysparameter t where t.parametermoduleid='BG_RAWLOAD' and t.parameterid='${eamid}_PIFNUM'"
 68 
 69 echo $sql > ${WORK_DIR}/.getpifnum.sql
 70 # 执行SQL,因无法直接获取到查询结果,故将结果写入到.pifnumresult中
 71 $SQLEXECCMD ${WORK_DIR}/.getpifnum.sql 1 "$ORACLE_IP;$ORACLE_PORT;$ORACLE_SID;$ORACLE_ADUSER;$ORACLE_ADPWD" > ${WORK_DIR}/.pifnumresult
 72 # 如果上面的shell执行成功,则获取
 73 if [ $? -eq 0 ]; then
 74     # 使用|分割行,并取第二行,打印出第一部分,NR表示读取的文件行数;FNR表示读取到的当前文件的行数,NR==FNR常用语判断输入多个文件时读取到第一个文件
 75     pifcounter=`$AWK -F\| '{if(NR==2){print $1}}' ${WORK_DIR}/.pifnumresult`
 76 fi
 77 if [ "$pifcounter" = "" ]; then
 78     # 如果针对某一ems实体的配置为空,则获取全局ems配置
 79     sql="select t.parametervalue from pm4h_ad.cfg_sysparameter t where t.parametermoduleid='BG_RAWLOAD' and t.parameterid='PIFNUM'"
 80     echo $sql > ${WORK_DIR}/.getpifnum.sql
 81     $SQLEXECCMD ${WORK_DIR}/.getpifnum.sql 1 "$ORACLE_IP;$ORACLE_PORT;$ORACLE_SID;$ORACLE_ADUSER;$ORACLE_ADPWD" > ${WORK_DIR}/.pifnumresult
 82     if [ $? -eq 0 ]; then
 83         pifcounter=`$AWK -F\| '{if(NR==2){print $1}}' ${WORK_DIR}/.pifnumresult`
 84     fi
 85     if [ "$pifcounter" = "" ];then
 86         # 如果上面的都失败了,则插入该记录到数据库,并设置默认值1000
 87         sql="insert into pm4h_ad.cfg_sysparameter(PARAMETERMODULEID,PARAMETERID,PARAMETERNAME,PARAMETERVALUE,DESCRIPTION) values('BG_RAWLOAD','PIFNUM','PIFNUM',1000,'the number of pif files which are handled by one process');"
 88         echo $sql > ${WORK_DIR}/.insertpifnum.sql
 89         $SQLEXECCMD ${WORK_DIR}/.insertpifnum.sql 1 "$ORACLE_IP;$ORACLE_PORT;$ORACLE_SID;$ORACLE_ADUSER;$ORACLE_ADPWD" 
 90         pifcounter=1000
 91     fi
 92 fi
 93 
 94 # 获取是否加载历史数据配置
 95 sql="select t.parametervalue from pm4h_ad.cfg_sysparameter t where t.parametermoduleid='BG_ALL' and t.parameterid='DATAPRIORITY'"
 96 echo $sql > ${WORK_DIR}/.selecthistorydate.sql
 97 $SQLEXECCMD ${WORK_DIR}/.selecthistorydate.sql 1 "$ORACLE_IP;$ORACLE_PORT;$ORACLE_SID;$ORACLE_ADUSER;$ORACLE_ADPWD" > ${WORK_DIR}/.ishistorydataresult
 98 
 99 if [ $? -eq 0 ];then
100     ishistorydata=`$AWK -F\| '{if(NR==2){print $1}}' ${WORK_DIR}/.ishistorydataresult`
101 else
102     ishistorydata=0
103 fi
104 
105 if [ "$ishistorydata" = "" ];then
106     ishistorydata=0
107 fi
108 
109 # 将文件名补充为完整的路径并追加到${PRESENTLIST}, {s:old:new:g}, ^表示匹配行开始,$表示匹配行结尾;pif$表示匹配”pif“且字段必须在结尾
110 ls ${LOAD_DIR}|sed "s:^:${LOAD_DIR}/:"|grep "\.pif$" > ${PRESENTLIST}
111 # 如果存在${LASTLIST}并且不存在${FORMATEDLIST},那么删除${LASTLIST};-a在test中表示and,&&仅当第一个判断为真时才会执行
112 test -f ${LASTLIST} -a ! -f ${FORMATEDLIST} && rm -f ${LASTLIST}
113 # 如果存在${FORMATEDLIST}而且不存在${LASTLIST},那么将${FORMATEDLIST}中的内容使用|分割后,取第三个参数赋值到${LASTLIST}
114 test -f ${FORMATEDLIST} -a ! -f ${LASTLIST} && awk -F"|" '{print $3 > "'${LASTLIST}'"}' ${FORMATEDLIST}
115 # 如果${FORMATEDLIST}不存在则新建${FORMATEDLIST}
116 test -f ${FORMATEDLIST} || touch ${FORMATEDLIST}
117 # 如果${LASTLIST}不存在则新建
118 test -f ${LASTLIST} || touch ${LASTLIST}
119 # 将${LASTLIST}中的内容升序排列并重新输出到${LASTLIST}
120 sort ${LASTLIST} -o ${LASTLIST}
121 # 取在${PRESENTLIST}出现但未在${LASTLIST}出现的记录到${CFORMATLIST},也就是新增的需要入库的文件
122 comm -23 ${PRESENTLIST} ${LASTLIST} > ${CFORMATLIST}
123 # 取在${LASTLIST}中,但不在${PRESENTLIST}中的文件列表,也就是需要删除的文件
124 comm -23 ${LASTLIST} ${PRESENTLIST} > ${CDELETELIST}
125 
126 # 如果${CDELETELIST}存在且可以被读取,那么执行SynLoadFmts这个jar,主要逻辑是从FORMATEDLIST和LASTLIST删除掉CDELETELIST中的内容
127 test -s ${CDELETELIST} && $JAVA ${JVM_PARAMETER} -jar -Xmx512m ${WORK_DIR}/SynLoadFmts.jar ${FORMATEDLIST} ${LASTLIST} ${CDELETELIST} ${emsentityid}
128 # 将 ${CFORMATLIST}中的内容解析并输出到${FORMATEDLIST}
129 test -s ${CFORMATLIST} && cat ${CFORMATLIST}|xargs -i awk -F"|" '{if(NR==1){for(i=1;i<NF;i++){if($i=="STARTDAY"){j=i;field2=$(i-2);}}}if(NR==3){field3=$j$(j+1);field4=$(j+2);exit;}}END{if(FNR<3){cmd=sprintf("mv %s %s", FILENAME, "'${LOAD_BACKUP_DIR}'");system(cmd);}else{print field3"|"field2"|"FILENAME"|"field4 >> "'${FORMATEDLIST}'";print FILENAME >> "'${LASTLIST}'"}}' {}
130 if [ "$ishistorydata" = "0" ];then
131     cat ${FORMATEDLIST}|grep -v '\.re[a-z0-9]\{8\}-[a-z0-9]\{4\}-[a-z0-9]\{4\}-[a-z0-9]\{4\}-[a-z0-9]\{12\}\.pif'|sort |head -n $pifcounter  > $FILELIST
132     #取$FILELIST的行数
133     fileline=`cat $FILELIST|wc -l`
134     #如果要采集的正常文件不足1000,则进行补采
135     if [ $fileline -lt $pifcounter ];then
136         addfilenumber=`expr $pifcounter \- $fileline`
137         cat ${FORMATEDLIST}|grep '\.re[a-z0-9]\{8\}-[a-z0-9]\{4\}-[a-z0-9]\{4\}-[a-z0-9]\{4\}-[a-z0-9]\{12\}\.pif'|sort |head -n $addfilenumber  >> $FILELIST
138 
139     fi
140 else        
141     #history data
142     cat ${FORMATEDLIST}|grep '\.re[a-z0-9]\{8\}-[a-z0-9]\{4\}-[a-z0-9]\{4\}-[a-z0-9]\{4\}-[a-z0-9]\{12\}\.pif'|sort |head -n $pifcounter > $FILELIST
143 
144     fileline=`cat $FILELIST|wc -l`
145     if [ $fileline -lt $pifcounter ];then
146         addfilenumber=`expr $pifcounter \- $fileline`
147         cat ${FORMATEDLIST}|grep -v '\.re[a-z0-9]\{8\}-[a-z0-9]\{4\}-[a-z0-9]\{4\}-[a-z0-9]\{4\}-[a-z0-9]\{12\}\.pif'|sort |head -n $addfilenumber >> $FILELIST
148 
149     fi
150 fi
151 
152 $JAVA  `echo ${JVM_PARAMETER}|sed 's/'-DORACLE_SID=$ORACLE_SID'/'-DORACLE_SID=$ORACLE_SID1'/'` -cp ${CLASSPATH}  -jar ${WORK_DIR}/rawload.jar $LOAD_DIR $LOAD_BACKUP_DIR ${emsentityid} ${FILELIST}
153 rm -f ${WORK_DIR}/$pidfile
154 rm -f ${WORK_DIR}/.getpifnum.sql
155 rm -f ${WORK_DIR}/.pifnumresult
156 rm -f ${WORK_DIR}/.insertpifnum.sql
157 rm -f ${WORK_DIR}/.selecthistorydate.sql
158 rm -f ${WORK_DIR}/.ishistorydataresult
159 rm -f ${WORK_DIR}/.emptyfile
160 test -f ${PRESENTLIST} && rm -f ${PRESENTLIST}
161 test -f ${CFORMATLIST} && rm -f ${CFORMATLIST}
162 test -f ${CDELETELIST} && rm -f ${CDELETELIST}
163 #echo -e "End:\t`date +%Y-%m-%d" "%H:%M:%S`" >> ${PM4H_SPOOL}/${eamid}/${emsentityid}/etc/time
164 #set +x
165 exit 0

 

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