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Hi, how do I check if a command exists on

host?

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function?

Nils- Автор вопроса
Déjà vu
function?

nope, command

Nils
nope, command

there are two types of terminal commands, builtin which are programmed inside of the shell program and external which are executables. for the first one just exec the shell and veriffy the returned value for the second one you just could check if the file exist or not but the first way also works.

Nils- Автор вопроса
Déjà vu
there are two types of terminal commands, builtin ...

how do I know the location of the executable?

Nils- Автор вопроса
Déjà vu
path env variable is one way

seems like the best way, is there some libc helper for that?

Nils
seems like the best way, is there some libc helper...

getenv, you also could pass it to main, there are many ways to check the path env var, for example in windows you could check a registry key, etc

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