pid | 易学教程

C++ Sending a simple signal in Windows

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问题 is there an equivalent to the function kill() on Windows? int kill(pid_t pid, int sig); If not, would it be possible to test if a process is running based on its PID? Thanks 回答1: Windows doesn't have signals in the unix sense. You can use OpenProcess to check if a process exists - If it succeeds, or fails with an access error, then the process exists. bool processExists(DWORD ProcessID) { HANDLE hProcess = OpenProcess(SYNCHRONIZE, FALSE, ProcessID); if (hProcess != NULL) { CloseHandle

windows系统查看端口占用

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netstat -ano #列出所用端口使用情况 netstat -aon|findstr "端口号" #查询指定端口 tasklist|findstr "PID" #PID" #按进程控制符查询是那个应用程序,PID为进程控制符然后在进程管理器上kill掉来源： https://www.cnblogs.com/micenote/p/11647659.html

ps aux | grep returns pid for itself too

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问题 I am using this command to get the process ID of another command: ps aux | grep 7000.conf | awk '{print $2}' This will return two PIDs: 7731 22125 I only want the first one. The second is the PID for grep in the above command. Thanks in advance to any one who knows how to alter the above command to return just the first pid. p.s. open to a new command that does the same thing 回答1: In this particular case, escaping the . to what I assume it was meant to do should work: ps aux | grep '7000\

Storing pid file for a daemon run as user

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问题 Is there a preferred place to store a pid file for a daemon that's run as a user? /var/run is the standard place, but this is for a user daemon so it doesn't have write privileges there. Presumably my daemon will be started from .profile or .bashrc or something. Is just saving it to /tmp a bad idea? 回答1: If it's being run for a user, let's see, what sort of storage exists that is user-specific. Hmmm. That's it! The home directory. I knew it would come to me eventually :-) Sorry for the light

Popen getting pid of newly run process

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I want to run some application in background and later kill it by pid. pipe = IO.popen("firefox 'some_url' 2>&1 &") pipe.pid This code starts firefox and return me some pid, but unfortunately it's not firefox's pid. pipe = IO.popen("firefox") pipe.pid This code starts firefox and return mi some pid, firefox's pid. Is there any solution to start external application and get its pid? Firefox is only for example it could be any other application. I also tried with libs like: Open3 and Open4 but seems to be the same effect. I also wonder if '$!' bash variable is good solution for this? Run

centos 安装 gitlab

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按照官方教程的步骤： https://about.gitlab.com/downloads/#centos6 但是执行这一步 curl https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.rpm.sh | sudo bash sudo yum install gitlab-ce 会报错找不到镜像文件。所以我自己下载了rpm 文件在安装。步骤如下： sudo yum install openssh-server sudo yum install postfix # sendmail or exim is also OK sudo rpm -i gitlab-6.9.2_omnibus.1-1.el6.x86_64.rpm # this is the .rpm you downloaded sudo gitlab-ctl reconfigure //可能会报错：External URL must include a FQDN（解决办法在下面） sudo lokkit -s http -s ssh # open up the firewall for HTTP and SSH requests ok! sudo gitlab-ctl status; #查看安装后的程序运行情况！输出如下：

SIGKILL init process (PID 1)

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I'm facing a weird issue regarding sending signal 9 (SIGKILL) to the init process (PID 1). As you may know, SIGKILL can't be ignored via signal handlers. As I tried sending SIGKILL to init, I noticed that nothing was happening; init would not get terminated. Trying to figure out this behaviour, I decided to attach myself to the init process with strace too see more clearly what was happening. Now comes the weird part. If I'm "looking" at the init process with strace and send it SIGKILL, the system crashes. My question is why is this happening? Why does the system crash when I look at the

用python记录运行pid，并在需要时kill掉它们

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我在跑爬虫程序的时候，由于爬虫程序的等待目标服务器返回数据的时间很长，而cpu占用很低，所以经常挂着代理一跑就跑好几百个。但是爬虫程序通常是写了死循环，或直到分配给该进程的任务都跑完才退出的。如果我们想中途结束掉这些任务，是没办法手工一个一个kill掉的。那么该如何结束这些进程呢？我的方法就是在运行爬虫进程时，记录该进程的Pid，然后在需要手动结束时，再用语句kill掉它们。 for i in { 1 .. 100 } do nohup python NetEase_comms_proxy.py > hehe.dat 2 >& 1 & echo $! >> run.pid sleep 10 done 上述语句完成了将脚本在后台运行100便，并且将pid append到run.pid文件中。其中nohup 是 no hang up的缩写命令。do…done之间是被循环的语句。接下来就是kill掉它们的语句了，我用的python import os if __name__ == '__main__' : fin = open( 'run.pid' , 'r' ) pids = [] for line in fin: pids.append(line.strip()) for pid in pids: cmd = 'kill ' + pid os.system(cmd)

PID from socket number on Windows?

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问题 I need to count amount of bytes sent and received from the network by various applications. First I thought about using LSP, but there is a lot of applications that do not use LSP at all (SMB for example). This is why I have written a small sniffer. This application works on IP level and collects data using recvfrom. So I have address of remote host, local and remote ports. This is pretty cool, but I also need to have PID of local socket owner. So, is there any simple way to obtain such PID?

What is the ___mac_get_pid symbol in a node profile?

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I am profiling some multi-process nodejs code run on OSX. I'm seeing: [C++]: ticks total nonlib name 23398 63.6% 63.8% ___mac_get_pid What is ___mac_get_pid ? It's name is certainly suggestive that it's some code that "gets a PID on a Mac", but the time seems excessive. Googling has provided nothing useful. __mac_get_pid is the syscall behind mac_get_pid library function. It is described in man page mac_get : http://man.cx/mac_get(3) mac_get_pid .. get the label of a file, socket, socket peer or process The mac_get_pid() and mac_get_proc() system calls return the process label associated with