首先，乙個完整的命令列程式應該包含哪些功能？
看看libhv是如何提供這些功能的，參考示例**見examples/hmain_test.cpp
編譯執行：
$ c++ -std=c++11 examples/hmain_test.cpp -o bin/hmain_test -i/usr/local/include/hv -lhv
$ bin/hmain_test -h
usage: hmain_test [hvc:ts:dp:]
options:
-h|--help print this information
-v|--version print version
-c|--confile set configure file, default etc/.conf
-t|--test test configure file and exit
-s|--signal send to process,
=[start,stop,restart,status,reload]
-d|--daemon daemonize
-p|--port set listen port
$ bin/hmain_test -v
hmain_test version 1.21.1.31
$ bin/hmain_test -c etc/hmain_test.conf -t
test confile [etc/hmain_test.conf] ok!
$ bin/hmain_test -d
$ bin/hmain_test -s restart -d
hmain_test stop/waiting
hmain_test start/running
$ bin/hmain_test -s status
hmain_test start/running, pid=27766
$ cat logs/hmain_test.pid
27776
$ cat logs/hmain_test*.log
2021-02-06 12:18:53.509 info hmain_test version: 1.21.1.31 [hmain_test.cpp:94:parse_confile]
2021-02-06 12:18:53.509 debug worker_processes=ncpu=2 [hmain_test.cpp:103:parse_confile]
2021-02-06 12:18:53.509 info parse_confile(
'/home/hw/github/libhv/etc/hmain_test.conf'
) ok [hmain_test.cpp:129:parse_confile]
2021-02-06 12:18:53.509 info create_pidfile(
'/home/hw/github/libhv/logs/hmain_test.pid'
) pid=27766 [hmain.cpp:317:create_pidfile]
2021-02-06 12:18:53.509 info workers[0] start/running, pid=27767 [hmain.cpp:611:master_workers_run]
2021-02-06 12:18:53.509 info workers[1] start/running, pid=27768 [hmain.cpp:611:master_workers_run]
2021-02-06 12:18:53.509 info master start/running, pid=27766 [hmain.cpp:614:master_workers_run]
2021-02-06 12:18:53.509 info worker_thread pid=27767 tid=27767 [hmain.cpp:539:worker_thread]
2021-02-06 12:18:53.510 info worker_thread pid=27768 tid=27768 [hmain.cpp:539:worker_thread]
2021-02-06 12:18:53.510 info worker_thread pid=27767 tid=27769 [hmain.cpp:539:worker_thread]
2021-02-06 12:18:53.510 info worker_thread pid=27768 tid=27770 [hmain.cpp:539:worker_thread]
$ ps aux |
grep hmain_test
hw 27776 0.0 0.0 18000 2084 ? ss 12:20 0:00 hmain_test: master process
hw 27777 0.0 0.0 91732 240 ? sl 12:20 0:00 hmain_test: worker process
hw 27778 0.0 0.0 91732 240 ? sl 12:20 0:00 hmain_test: worker process
$ sudo
kill -9 27778
$ ps aux |
grep hmain_test
hw 27776 0.0 0.0 18000 2084 ? ss 12:20 0:00 hmain_test: master process
hw 27777 0.0 0.0 91732 240 ? sl 12:20 0:00 hmain_test: worker process
hw 27796 0.0 0.0 91732 244 ? sl 12:27 0:00 hmain_test: worker process
hmain_test提供了列印幫助資訊、列印版本資訊、測試配置檔案、後台執行、建立pid檔案、檢視程序狀態、開始｜停止｜重啟程序、master-workers多程序模式、崩潰自動重啟等功能。
流程圖：
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