问题
I'm using Mac OS. I want to execute a system command using (use '[clojure.java.shell :only [sh]]), like in How to execute system commands?. I have read https://clojuredocs.org/clojure.java.shell/sh but wasn't able to understand things like how many parameters can be passed in one syntax, etc.
In windows I have tried (sh "cmd" "/C" "dir")and it was working but in Mac OS, how do I execute the above syntax? Moreover I want to pass more parameters than just dir. For example, I want to execute (sh "cmd" "/c" "mged" "test.g").
NOTE: mged and test.g are referred from Brl-Cad.
I want to draw a sphere using above example.
回答1:
On MacOS or Linux this works:
user=> (require '[clojure.java.shell :as sh])
nil
user=> (sh/sh "ls" "-la")
...
回答2:
clojure.java.shell just spawns the process with the given arguments (and :env and :dir and ... - see the doc). So first of all there is most likely no cmd on OSX/Unix, but there usually is a shell. And the "same" as cmd /c on the shell is -c. -c takes one argument and you can write your "shell code" there - that means you can use pipes, redirects, env-vars, ... - so if you just want to execute a tool with a param, use:
(sh "mged" "test".g")
If you want "shell features" use:
(sh "/bin/sh" "-c" "echo ${TERM} | tr x u")
(note that the "shell code" is just one argument)
来源：https://stackoverflow.com/questions/56772111/can-anyone-explain-me-about-the-sh-in-clojure-in-order-to-execute-the-system-com