identifier (PID) if the execution succeeds, or returns if an error occursreturn value-1. The reason for failure is stored in errno. /** * * * waitpid.c-simple wait usage *********/#include#include#include#include#includeintMainvoid) {pid_t childpid; intstatus; Childpid=Fork (); if( -1==childpid) {Perror ("Fork ()" ); Exit (Exit_failure); }Else if(0==childpid) {Puts ("In child process" ); Sleep (3);//let the child process sleep for 3 seconds to see the behavior of the parent processprintf
v17.06.0-ce - Generic Running tcp://192.168.1.80:2376 v17.06.0-ce Remotely execute Docker commands to create a Docker virtual machine[Email protected]:~$ docker-machineSSH theDockerPS-acontainer ID IMAGE COMMAND CREATED STATUS PORTS NAMES691BD1E50CD2 Hello-world"/hello" 2Days ago Exited (0)2Days ago Tender_banach[email protected]:~$ Docker-machineSSH theDocker Run hello-World[email protected]:~$ Doc
Recently need to install Gitlab on the server, after using Yum install Postfix, start post error, debug display the following error message[[Email protected] ~]# systemctl status Postfix.service postfix.service-Postfix Mail Transport Agent loaded:loaded (/usr/lib/systemd/system/postfix.service; Vendor preset:disabled) Active:failed (Result:exit-code) since five2018-Geneva- Geneva the: +:WuyiCST; 27min ago Process:11414Execstart=/usr/sbin/postfix Start (code=
Fpm_pctl_kill_all si Gnal SIGTERM to Child 7972 (pool default) Jan 16:58:35.845662 [NOTICE] Fpm_pctl_kill_all (), line 172:sending signal SIGTERM to Child 7971 (pool default) Jan 16:58:35.845671 [NOTICE] Fpm_pctl_kill_all (), line 172:sending signal SI Gterm to Child 7970 (pooL default) Jan 16:58:35.845678 [NOTICE] Fpm_pctl_kill_all (), line 172:sending signal-SIGTERM to Child 7969 (pool def Ault) Jan 16:58:35.845686 [NOTICE] Fpm_pctl_kill_all (), line 172:sending signal-SIGTERM to child 7968 (
replaces the aFunction function. In fact, before the modifier operator @ is added, you have to do some relatively low operations to accomplish the same thing:
def foo(): passfoo = staticmethod(foo)
With the @ operator, you can get the same result elegantly:
@staticmethoddef foo(): pass
However, many people oppose the decorator because of this, but @ is only a small syntactic sugar. it passes a function object to another function and then replaces the original method with the return value.I
= "Android.intent.action.BOOT_COMPLETED" /> Intent-filter>receiver>Where Intent-filter is assigned this broadcast sink to receive a specific broadcast type. In this example, the broadcast that is issued by the system itself when receiving a network state change or when booting is turned on. When the app is first launched, the system automatically instantiates the mybroadcastreceiver and registers it with the system.Used to say: Static registered broadcast receiver even if the app has
previous interface, select "globals ":
This configuration item mainly focuses on the following options:First, do not select checkout read-only. OtherwiseSource codeThe user is not allowedModify, and this option is selected by default;Second, do not select prune (remove) empty directories. Otherwise, the empty directory is automatically deleted;Third, if there are no special requirements for general configuration, set dirty files support, supply control when addingSelect from the TCP/IP compre
. Log ("S1 entered") OnExited:console.log ("S1 exited") state {ID:S11 Sig naltransition {targetstate:s12//toggle State signal:button.clicked based on signal } onEntered:console.log ("S11 entered") OnExited:console.log ("S11 exited")} State {ID:S12 Signaltransition {//Toggle state targetstate According to signal: S13 signal:button.clicked} signaltransition {//override the signal of t
Login, the following log will appear: HTMLcode ...... [SunAug1609: 20: Apache suspended, Apache maintenance, master please, thank you
Then, the following log is displayed:
HTML code
...... [Sun Aug 16 09:20:45 2009] [notice] Parent: child process exited with status 1 -- Restarting. [Sun Aug 16 09:20:45 2009] [notice] Apache/2.2.4 (Win32) configured -- resuming normal operations [Sun Aug 16 09:20:45 2009] [notice] Server built: jan 9 2007 23:17
The following refer to the hacker line of Defense 2012 consolidated 354 pagesMSDN Quote:The Pssetcreateprocessnotifyroutineex routine registers or removes a callback routine that notifies the caller WH En a process is created or exits.NTSTATUSPssetcreateprocessnotifyroutineex (In pcreate_process_notify_routine_ex Notifyroutine ,In BOOLEAN Remove);You can register a callback function through this function to monitor the process creation. Much more convenient than hooks.For Createprocessnotifyex:V
(Switch) Linux Process Control-Wait ()
# Include # Include Pid_t wait (int * Status)
Once a process calls wait, it immediately blocks itself. Wait automatically analyzes whether a sub-process of the current process has exited. If it finds such a sub-process that has become a zombie, wait will collect information about this sub-process and destroy it completely and return it. If such a sub-process is not found, wait will be blocked until
, the java Process will not exit.
This is an interesting phenomenon,catalina.sh startTomcat started in the same way will mount the java Processinit(Process id is 1) under the parent processtest.shThe process is out of the parent-child relationship and has nothing to do with the ssh process. Why does closing the ssh terminal window cause the java Process to exit?
We assume that when the ssh window is closed, the shell for the current interaction and the test that is running are. sh and other sub-
1.8 wait
1.8.1 Overview
The wait function is prototype:
# Include # Include Pid_t wait (int * Status)
Once a process calls wait, it immediately blocks itself. Wait automatically analyzes whether a sub-process of the current process has exited. If it finds such a sub-process that has become a zombie, wait will collect information about this sub-process and destroy it completely and return it. If such a sub-process is not
When rabbitmq-server is installed in yum, an error is reported.[Root @ openstack ~] # Systemctl start rabbitmq-server.serviceJob for rabbitmq-server.service failed. See 'systemctl status rabbitmq-server.service 'and 'journalctl-xn' for details.[Root @ openstack ~] # Systemctl status rabbitmq-server.serviceRabbitmq-server.service-RabbitMQ brokerLoaded: loaded (/usr/lib/systemd/system/rabbitmq-server.service; enabled)Active: failed (Result: exit-code) since 6 2016-04-30 23:19:21 CS
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