pid | 易学教程

Using fork() in simplest form need to hit enter to finish execution

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问题 I want to run some simple example to find out how fork() system call work. Its work but need to hit enter to exit the program after printing child process . #include <stdio.h> #include <unistd.h> int main() { pid_t pid; pid = fork(); if(pid == 0){ printf("child process\n"); } else{ printf("parent process\n"); } return 0; } compile, run & output ss@ss:~$ gcc dd.c -o dd ss@ss:~$ ./dd parent process ss@ss:~$ child process after print child process on screen program need to hit enter key to

Find java PID using batch

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问题 I need to know java process PID from Windows batch console. @echo off set p=%CD% FOR /F "tokens=1" %%A IN ('"%JAVA_HOME%/bin/jps.exe -v"\|find "%p%"') DO SET str=%%A echo str = "%str%" Java process unique identifier is path from what it was executed. Script executes jps, that returns all java process information, for example 9376 Jps -Denv.class.path=D:\tools\timesten\lib\ttjdbc6.jar; -Dapplication.home=C:\Program Files\Java\jdk1.6.0_24 -Xms8m 3856 -Dexe4j.semaphoreName=c:_program files (x86)

AppleScript: Hide/Get process name from app

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问题 I want to hide the frontmost app. I know you can hide a process using the syntax: tell application "System Events" set visible of process "..." to false end tell and i know how to get the frontmost app: (path to frontmost application as string) But how do I bridge the two commands together? This will not work: tell application "System Events" set visible of process (path to frontmost application as string) to false end tell 回答1: Try this. tell application "System Events" set frontProcess to

Bash: Is it possible to stop a PID from being reused?

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问题 Is it possible to stop a PID from being reused? For example if I run a job myjob in the background with myjob & , and get the PID using PID=$! , is it possible to prevent the linux system from re-using that PID until I have checked that the PID no longer exists (the process has finished)? In other words I want to do something like: myjob & PID=$! do_not_use_this_pid $PID wait $PID allow_use_of_this_pid $PID The reasons for wanting to do this do not make much sense in the example given above,

Find PID of a Process by Name without Using popen() or system()

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问题 I've a process name and I've to send a kill() signal to that process but I need its PID to call kill() . I would only like to use: popen("pidof process_name"); as the last thing. Is there any other way to find out the process' PID? One way I could think of is to send a socket request to that process and ask to its PID. The other way is a little too complicated for a simple code I'm writing: to do what pidof command's source code is actually doing (it uses a function call find_pid_by_name()

17 Process Groups and Terminal Signaling

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1 Pipelines and Process Groups 1.1 Pipeline of processes 1.the pipeline executes in parallel sleep 10 | sleep 20 | sleep 30 | sleep 50 & 1.2 Process Grouping for Jobs A process group is a way to group processes into distinct jobs that are linked a session is way to link process groups under a single interruptive unit, like the terminal. 2 Programming with Process Groups 获得pid/pgid 描述 pid_t getpid() get the process id for the calling process pid_t getppid() get the process id of the parent of the calling proces pid_t getpgrp() get the prcesso group id of the calling process pid_t getpgid(pid_t

MacOSX: find out if a process (given a PID) is running in 32bit or in 64bit Intel mode

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问题 I have a PID and I want to find out if the process is running in 32bit or in 64bit Intel mode. How? 回答1: I can do via NSRunningApplication. [[NSRunningApplication runningApplicationWithProcessIdentifier:pid] executableArchitecture] returns the Mach-O architecture constant. This works only for GUI applications, though... 来源： https://stackoverflow.com/questions/7335245/macosx-find-out-if-a-process-given-a-pid-is-running-in-32bit-or-in-64bit-inte

【最新】Windows10关闭占用某一端口号的进程

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以8080端口为例查看 8080端口运行的进程 1 netstat - ano | findstr "8080" 强制杀死指定 pid 进程 2 taskkill / f / pid 19368 / t 参数： / f：强制杀死进程 / pid 2052 ：指定要杀死进程的 pid = 2052 / t：杀死该进程和该进程启动的子进程学如逆水行舟，不进则退来源： CSDN 作者： Chocolate_19 链接： https://blog.csdn.net/weixin_42429718/article/details/103639969

Java之内存诊断

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Java 内存诊断比较容易，需要： 1 获取heap dump 2 分析heap dump 1.1 获取dump之1 VM arguments: -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=./java_pid<pid>.hprof reference for VM options: http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html 如果不指定， dump文件默认输出到user.dir中, 可用jinfo <pid>获取user.dir变量设置。 java.lang.OutOfMemoryError: Java heap space Dumping heap to java_pid8096.hprof ... Heap dump file created [168062394 bytes in 1.306 secs] 注意得到文件后，可用下面命令进行分析： jmap -histo ./java_pid<pid>.hprof 1.2 获取dump之2 jmap/jcmd jmap -dump:format=b,file=snapshot.jmap <pid> jcmd <process id/main class> GC

Getting the Process ID of another program in Groovy using 'command slinging'

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问题 import java.lang.management.* final String name = ManagementFactory.getRuntimeMXBean().getName(); final Integer pid = Integer.parseInt(name[0..name.indexOf("@")-1]) I tried this in my code but that gets the pid of the running program. I am running a sleeping script (all it does is sleep) called sleep.sh and i want to get the pid of that. Is there a way to do that? I have not found a very good way myself. I also used a ps | grep and i can see the process id is there a way to output it though?