ps는 프로세스 명령 행의 최대 4096 자만 인쇄합니다

Java 프로세스를 grep하면 출력이 낮아 지지만 grep출력에 표시되지 않는 실제 프로세스 이름 (kafka.Kafka)으로 표시되는 4096 문자로 제한됩니다 .

이것이 grep의 제한입니까? 4096자를 초과하는 문자를 인쇄하는 방법이 있습니까?

ps -ef | grep java

java -Xmx6G -Xms6G -server -XX : + UseG1GC -XX : MaxGCPauseMillis = 20 -XX : InitiatingHeapOccupancyPercent = 35 -XX : + DisableExplicitGC -Djava.awt.headless = true -Xloggc : / x / kafka / data01 / kafka-app -logs / kafkaServer-gc.log -verbose : gc -XX : + PrintGCDetails -XX : + PrintGCDateStamps -XX : + PrintGCTimeStamps -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.authenticate = false -Dcom. sun.management.jmxremote.ssl = false -Dkafka.logs.dir = / x / kafka / data01 / kafka-app-logs -Dlog4j.configuration = file : ./../ config / log4j.properties -cp : / x /home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/aopalliance-repackaged-2.4.0-b34.jar:/x/home/bmcuser/kafka-paypal/kafka_2.10 -0.10.1.1 / bin /../ libs / argparse4j-0.5.0.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / connect-api- 0.10.1.1.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/ ../libs/connect-file-0.10.1.1.jar:/x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/connect-json-0.10.1.1.jar:/ x / home / bmcuser / kafka-paypal / kafka_2.10-0.10.1.1 / bin /../ libs / connect-runtime-0.10.1.1.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10- 0.10.1.1/bin/../libs/guava-18.0.jar:/x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/hk2-api-2.4.0 -b34.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / hk2-locator-2.4.0-b34.jar : / x / home / bmcuser / kafka-paypal / kafka_2.10-0.10.1.1 / bin /../ libs / hk2-utils-2.4.0-b34.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/ bin /../ libs / jackson-annotations-2.6.0.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / jackson-core-2.6.3 .jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / jackson-databind-2.6.3.jar : / x / home / bmcuser / kafka-paypal / kafka_2.10-0.10.1.1 / bin / ../libs/jackson-jaxrs-base-2.6.3.jar:/x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/jackson-jaxrs-json-provider-2.6 .3.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / jackson-module-jaxb-annotations-2.6.3.jar : / x / home / bmcuser / kafka-paypal / kafka_2.10-0.10.1.1 / bin /../ libs / javassist-3.18.2-GA.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/ bin /../ libs / javax.annotation-api-1.2.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / javax.inject-1.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / javax.inject-2.4.0-b34.jar : / x / home / bmcuser / kafka-paypal / kafka_2.10-0.10.1.1 / bin /../ libs / javax.servlet-api-3.1.0.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/ .. /libs/javax.ws.rs-api-2.0.1.jar:/x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/jersey-client-2.22.2 .항아리:/x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/jersey-common-2.22.2.jar:/x/home/bmcuser/kafka-paypal/kafka_2.10 -0.10.1.1 / bin /../ libs / jersey-container-servlet-2.22.2.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / 저지 컨테이너 컨테이너 서블릿 코어 2.22.2.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / jersey-guava-2.22.2.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/jersey-media-jaxb-2.22.2.jar:/x/home/bmcuser/kafka-paypal/kafka_2 .10-0.10.1.1 / bin /../ libs / jersey-server-2.22.2.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / jetty-continuation-9.2.15.v20160210.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / jetty-http-9.2.15.v20160210.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/jetty-io-9.2.15.v20160210.jar :/x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/jetty-security-9.2.15.v20160210.jar:/x/home/bmcuser/kafka-paypal/kafka_2 .10-0.10.1.1 / bin /../ libs / jetty-server-9.2.15.v20160210.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / jetty-servlet-9.2.15.v20160210.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / jetty-servlets-9.2.15.v20160210. jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / jetty-util-9.2.15.v20160210.jar : / x / home / bmcuser / kafka-paypal /kafka_2.10-0.10.1.1/bin/../libs/jopt-simple-4.9.jar:/x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/ kafka_2.10-0.10.1.1.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / kafka_2.10-0.10.1.1-so/libs/jetty-server-9.2.15.v20160210.jar:/x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/jetty-servlet-9.2.15.v20160210 .jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / jetty-servlets-9.2.15.v20160210.jar : / x / home / bmcuser / kafka- paypal / kafka_2.10-0.10.1.1 / bin /../ libs / jetty-util-9.2.15.v20160210.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/ ../libs/jopt-simple-4.9.jar:/x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/kafka_2.10-0.10.1.1.jar:/ x / home / bmcuser / kafka-paypal / kafka_2.10-0.10.1.1 / bin /../ libs / kafka_2.10-0.10.1.1-so/libs/jetty-server-9.2.15.v20160210.jar:/x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/jetty-servlet-9.2.15.v20160210 .jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin /../ libs / jetty-servlets-9.2.15.v20160210.jar : / x / home / bmcuser / kafka- paypal / kafka_2.10-0.10.1.1 / bin /../ libs / jetty-util-9.2.15.v20160210.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/ ../libs/jopt-simple-4.9.jar:/x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/kafka_2.10-0.10.1.1.jar:/ x / home / bmcuser / kafka-paypal / kafka_2.10-0.10.1.1 / bin /../ libs / kafka_2.10-0.10.1.1-so/libs/jetty-util-9.2.15.v20160210.jar:/x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/jopt-simple-4.9.jar:/ x / home / bmcuser / kafka-paypal / kafka_2.10-0.10.1.1 / bin /../ libs / kafka_2.10-0.10.1.1.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10- 0.10.1.1/bin/../libs/kafka_2.10-0.10.1.1-so/libs/jetty-util-9.2.15.v20160210.jar:/x/home/bmcuser/kafka-paypal/kafka_2.10-0.10.1.1/bin/../libs/jopt-simple-4.9.jar:/ x / home / bmcuser / kafka-paypal / kafka_2.10-0.10.1.1 / bin /../ libs / kafka_2.10-0.10.1.1.jar : /x/home/bmcuser/kafka-paypal/kafka_2.10- 0.10.1.1/bin/../libs/kafka_2.10-0.10.1.1-so

이것은의 제한되지 않습니다 grep만의, /proc/PID/cmdline(기술적, 디자인 결정되지 제한). /proc/PID/cmdlineASCII NUL로 구분 된 기본 명령 및 인수와 함께 프로세스의 전체 명령 행을 포함하며 파일도 NUL로 끝납니다. 따라서 grep일치하는 경우 전체 파일 내용을 인쇄합니다. ( ps -ef이 파일의 내용을로 가져옵니다 CMD).

최대 길이는 (Linux) 커널에서 다음과 같이 하드 코딩됩니다PAGE_SIZE .

static int proc_pid_cmdline(struct task_struct *task, char * buffer)
{
        int res = 0;
        unsigned int len;
        struct mm_struct *mm = get_task_mm(task);
        if (!mm)
                goto out;
        if (!mm->arg_end)
                goto out_mm;    /* Shh! No looking before we're done */

        len = mm->arg_end - mm->arg_start;

        if (len > PAGE_SIZE)
                len = PAGE_SIZE;

따라서 이러한 시스템의 경우 4096 바이트 :

% getconf PAGE_SIZE
4096

또한 멀티 바이트 문자가있는 경우 상상할 수 있듯이 문자 수는 4096 미만입니다.