Re: [Cppcms-users] cppcms::service and system(..)

[kpeo <sla...@ya...>]

Hello,

Fast answer:
system() is not so thread-safe way for calling system scripts. 
E.g., you can use booster::aio::deadline_timer (async_wait method)
or simple "old" pipe-method like this:

# define MAX_BUFFER 1024
std::string vexec(std::string const &cmd)
{
        char buf[MAX_BUFFER];
        std::string out;

        FILE* pipe = popen(cmd.c_str(), "r" );
        if (pipe == NULL ) {
                BOOSTER_LOG(debug,__FUNCTION__) << "invoking " << cmd << " is failed";
                return "";
        }
        while(1) {
fgets(buf, MAX_BUFFER, pipe) != NULL ) {
                out.append(buf);
        }
        pclose(pipe);
        return out;
}

Shure, this realisation needs in implementing of timeout for waiting of answer.

Regards,
kpeo

18.07.2012, 15:03, "Christian Gmeiner" <chr...@gm...>:
> Hi all,
>
> I would like to implement a Service class based on cppcms::service. I would like
> to trigger the rpc call via java script (works) and in the Service
> class I would like
> to use system() function to execute a bash script.
>
> If after executing/while executing the system function the cppcms apps
> hangs completely.
> My Service implements also a RPC call which does a reboot of the
> system - which works.
>
> Any idea what could went wrong?
>
> thanks
> ---
> Christian Gmeiner, MSc
>
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