exec is blocked by service command on Ubuntu

[csfreebird]

On Ubuntu, I configured some services under /etc/init.d/ folder

When start my service in terminal, it works fine

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# service sign_service start
 * Starting sign service                                                                                                                                                         /


But If I try to launch it in newlisp, the exec function is blocked, how to solve this problem?

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> (exec "service sign_service start")

I tried add &, but no effect

[csfreebird]

I fixed this problem. It's nothing to do with newLisp. Just edit /etc/init.d/data_service script file

replace

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./data_service ./config.xml &

with

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nohup ./data_service_d ./config.xml > /dev/null 2>&1 &