进程 grep 给出模棱两可的输出

Question

我有这个 init.d 脚本，我正在检查应用程序的状态，预期的输出应该是 “应用程序正在以 PID: XXXX 运行”

无论如何，我将向您展示我使用过的代码：

ps -ef|grep -v grep |grep Jazz |grep -v "Jazz status"|awk '{ if ( $2 != "") print "Jazz Running with PID:",$2"; else print "Jazz not running";}'

当我在终端上运行它时，我得到以下输出：

    Jazz Running with PID: 6261
    Jazz Running with PID: 30077

当我删除打印语句并输出 $2 时，我得到以下输出：

#ps -ef|grep -v grep |grep Jazz |grep -v "Jazz status"|awk '{ if ( $2 != "") print $2}'   
300077

我希望输出是

Jazz Running with PID: 300773

我很困惑为什么我在第一种情况下得到两个 PID？ P.S第一个PID不断变化，类似于显示命令本身的PID。

---

编辑： 输出：ps -ef|grep Jazz

netcool  12744     1  5 13:03 ?        00:06:06 /opt/IBM/tivoli/webSphere/AppServer/java/bin/java -Declipse.security -Dwas.status.socket=38692 -Dosgi.install.area=/opt/IBM/tivoli/webSphere/AppServer -Dosgi.configuration.area=/opt/IBM/tivoli/jazzSM/profile/servers/server1/configuration -Djava.awt.headless=true -Dosgi.framework.extensions=com.ibm.cds,com.ibm.ws.eclipse.adaptors -Xshareclasses:name=webspherev85_1.6_64_%g,nonFatal -Xbootclasspath/p:/opt/IBM/tivoli/webSphere/AppServer/java/jre/lib/ibmorb.jar -classpath /opt/IBM/tivoli/jazzSM/profile/properties:/opt/IBM/tivoli/webSphere/AppServer/properties:/opt/IBM/tivoli/webSphere/AppServer/lib/startup.jar:/opt/IBM/tivoli/webSphere/AppServer/lib/bootstrap.jar:/opt/IBM/tivoli/webSphere/AppServer/lib/jsf-nls.jar:/opt/IBM/tivoli/webSphere/AppServer/lib/lmproxy.jar:/opt/IBM/tivoli/webSphere/AppServer/lib/urlprotocols.jar:/opt/IBM/tivoli/webSphere/AppServer/deploytool/itp/batchboot.jar:/opt/IBM/tivoli/webSphere/AppServer/deploytool/itp/batch2.jar:/opt/IBM/tivoli/webSphere/AppServer/java/lib/tools.jar -Dibm.websphere.internalClassAccessMode=allow -Xms512m -Xmx1024m -Xcompressedrefs -Xscmaxaot4M -Xscmx60M -Dws.ext.dirs=/opt/IBM/tivoli/webSphere/AppServer/java/lib:/opt/IBM/tivoli/jazzSM/profile/classes:/opt/IBM/tivoli/webSphere/AppServer/classes:/opt/IBM/tivoli/webSphere/AppServer/lib:/opt/IBM/tivoli/webSphere/AppServer/installedChannels:/opt/IBM/tivoli/webSphere/AppServer/lib/ext:/opt/IBM/tivoli/webSphere/AppServer/web/help:/opt/IBM/tivoli/webSphere/AppServer/deploytool/itp/plugins/com.ibm.etools.ejbdeploy/runtime -Dderby.system.home=/opt/IBM/tivoli/webSphere/AppServer/derby -Dcom.ibm.itp.location=/opt/IBM/tivoli/webSphere/AppServer/bin -Djava.util.logging.configureByServer=true -Duser.install.root=/opt/IBM/tivoli/jazzSM/profile -Djava.ext.dirs=/opt/IBM/tivoli/webSphere/AppServer/tivoli/tam:/opt/IBM/tivoli/webSphere/AppServer/java/jre/lib/ext -Djavax.management.builder.initial=com.ibm.ws.management.PlatformMBeanServerBuilder -Dpython.cachedir=/opt/IBM/tivoli/jazzSM/profile/temp/cachedir -Dwas.install.root=/opt/IBM/tivoli/webSphere/AppServer -Djava.util.logging.manager=com.ibm.ws.bootstrap.WsLogManager -Dserver.root=/opt/IBM/tivoli/jazzSM/profile -Dcom.ibm.security.jgss.debug=off -Dcom.ibm.security.krb5.Krb5Debug=off -Dfas.install.location=/opt/IBM/tivoli/jazzSM/admin -Dfas.ui.install.location=/opt/IBM/tivoli/jazzSM/admin_ui -Djava.library.path=/opt/IBM/tivoli/webSphere/AppServer/lib/native/linux/x86_64/:/opt/IBM/tivoli/webSphere/AppServer/java/jre/lib/amd64/default:/opt/IBM/tivoli/webSphere/AppServer/java/jre/lib/amd64:/opt/IBM/tivoli/webSphere/AppServer/bin:/usr/lib:/opt/IBM/tivoli/jazzSM/reporting/cognos/bin64: -Djava.endorsed.dirs=/opt/IBM/tivoli/webSphere/AppServer/endorsed_apis:/opt/IBM/tivoli/webSphere/AppServer/java/jre/lib/endorsed:/opt/IBM/tivoli/webSphere/AppServer/endorsed_apis:/opt/IBM/tivoli/webSphere/AppServer/java/jre/lib/endorsed -Djava.security.auth.login.config=/opt/IBM/tivoli/jazzSM/profile/properties/wsjaas.conf -Djava.security.policy=/opt/IBM/tivoli/jazzSM/profile/properties/server.policy com.ibm.wsspi.bootstrap.WSPreLauncher -nosplash -application com.ibm.ws.bootstrap.WSLauncher com.ibm.ws.runtime.WsServer /opt/IBM/tivoli/jazzSM/profile/config JazzSMNode01Cell JazzSMNode01 server1
netcool  19735 19678  0 14:50 pts/0    00:00:00 grep Jazz

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编辑 我用过的完整的 init.d 脚本：

#!/bin/sh

USER="xxxxxxx"
PASSWORD="xxxxxx"
start() {
su - netcool -c "/opt/IBM/tivoli/jazzSM/profile/bin/startServer.sh server1"

RETVAL=$?
return $RETVAL
}
stop() {
su - netcool -c "/opt/IBM/tivoli/jazzSM/profile/bin/stopServer.sh server1 -username ${USER} -password ${PASSWORD}"

RETVAL=$?
return $RETVAL
}
status() {
ps -ef|grep -v grep |grep Jazz |grep -v awk |grep -v "Jazz status" |awk '{ if ( $2!= "") print "Jazz is running with PID:",$2; else print "Jazz is not running";}'
#pid=$(pgrep -f Jazz) && echo "Jazz Running with PID: $pid" || echo "Jazz is not running"
}
case $1 in
"start")
start
;;
"stop")
stop
;;
"status")
status
;;
"restart"|"reload")
stop
start
;;

*)
echo "usage: $0 {start|stop|status|restart|reload}"
RETVAL=1
esac
exit 0

希望对你有帮助

---

更新 根据@jlliagre 的建议，运行以下命令仍然给了我多个 PID 作为输出：

[root@hjkpnlinst04 ~]# pid=$(pgrep -f jazzSM) && echo "Jazz Running with PID: $pid" || echo "Jazz is not running"
Jazz Running with PID: 12744
13176
13299

现在我正在运行这个命令，它似乎在进程运行时给了我所需的输出，但是当进程没有运行时没有给我“else”输出：

ps -ef|grep -v grep |grep Jazz |grep -v awk |grep -v "Jazz status" |awk '{ if ( $2!= "") print "Jazz is running with PID:",$2; else print "Jazz is not running";}'

Answer 1

该命令应该可以工作（假设pgrep 可用）：

pid=$(pgrep -f JazzSMNode01Cell) && echo "Jazz Running with PID: $pid" || echo "Jazz is not running"

Answer 2

您很可能正在寻找 awk。您排除了 grep，但不排除 awk。 更好的方法是使用 pgrep 命令，例如：

echo "java is running with pids ", `pgrep java`

将列出所有运行 Java 进程的 pid。它只查看进程映像名称，而不是命令行。我不确定 pgrep 的便携性如何，但它可以在 Linux、FreeBSD 和 OS X 上使用，对我来说已经足够好了。

但是查看您更新的答案，我发现您正在寻找命令行关键字，因此就像@jlliagre 建议的那样，您应该使用 -f 开关。 pgrep 的优点是它足够聪明，可以排除自己，不像 awks 和 grep 链。