How to create a service process on Mac OS X

There are a total of 4 background process types on Mac. For details, refer to designing daemons and services. You can use launch daemon to start the service without relying on users.

Create launch daemon

• Run xcode to create a simple command line ApplicationWebtwainservice.

  #import <Foundation/Foundation.h> int main(int argc, const char * argv[]){     @autoreleasepool {         // insert code here...        NSLog(@"Hello, World!");     }     while (1)    {        sleep(100);    }    return 0;}

• Compile the project and put webtwainservice in/Applications/dynamsoft/webtwainservice.

• Refer to create launch daemons and agents to create a configuration fileCom. dynamsoft. webtwainservice. plist.

• Standarderrorpath & standardoutpath: Service Log File Path

• Keepalive. Set to true. OnceWebtwainserviceThe system automatically restarts the service after an exception occurs.

• Label: A unique value

• Programarguments: Executable file path

• The plist configuration file can be stored in the following places:

• ~ /Library/launchagents

• /Library/launchagents

• /Library/launchdaemons

• /System/library/launchagents

• /System/library/launchdaemons

• SetCom. dynamsoft. webtwainservice. plistPut in/Library/launchdaemons.

• To successfully register a service, you must also modify the directory permission:Sudo chown root/library/launchdaemons/COM. dynamsoft. webtwainservice. plist.

• EnterSudo launchctlRun launchd

• Registration ServiceLoad-D system/library/launchdaemons/COM. dynamsoft. webtwainservice. plist. Then we can see that the service is loaded:

  
  

• Enter list to view running processes.

  
  

• Restart the system, and then open the log/var/log/webtwain. log to check whether the service is running:
  

How to create a service process on Mac OS X