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