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Re: [libmicrohttpd] Waiting daemon thread in main

From: Christian Grothoff
Subject: Re: [libmicrohttpd] Waiting daemon thread in main
Date: Wed, 10 Jun 2015 23:53:49 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.6.0

The most trivial hack you can do is replace 'getchar()' with
sleep(-1).  That should work for the minimal requirements you formulate.

Cleaner implementations would install a signal handler (sigaction()) and
send a message through a pipe(2) to unblock.

Happy hacking!


On 06/10/2015 06:26 PM, Joan Puigcerver wrote:
> Hi,
> I am trying to use libmicrohttpd to build a small HTTP server to run
> in background in my Linux system. Right now, this is the structure of
> the main function of my server:
> ----------
> struct MHD_Daemon *daemon;
> daemon = MHD_start_daemon(
>       port_, NULL, NULL, &answer_to_connection, index_,
>       MHD_OPTION_END);
> if (NULL == daemon) return 1;
> getchar();
> MHD_stop_daemon (daemon);
> return 0;
> ----------
> However, the previous approach does not work when I try to launch the
> server in background, since getchar() read an EOF and the server
> terminates. I just want to hang the main thread until the process is
> killed (kill -9 or Ctrl+C).
> I tried to do:
> pthread_join(daemon->pid);
> But MHD_Daemon is only declared in "microhttpd.h", and it is defined
> in some other file, so I cannot access the pid attribute.
> So, what is the proper way to do what I want?
> Many thanks,
> Joan.

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