After setting environment, QProcess::start() no effect.

[aaron]

Dear yogeshgokul,
Thank you !
I have ever set the env like : env <<"PATH = /home/azhang/env/tool.env" ,
but the result is same. Why?

[yogeshgokul]

Dear yogeshgokul,
Thank you !
I have ever set the env like : env <<"PATH = /home/azhang/env/tool.env" ,
but the result is same. Why?

Its hard to decide upon little information.
What if you add that path permanently in path variable using command promt or terminal and not with qt app itself ?
I just wanna be sure that adding

home/azhang/env/tool.env"

in path is making any difference anyway.

[wysota]

I have ever set the env like : env <<"PATH = /home/azhang/env/tool.env" ,
but the result is same. Why?

Setting PATH before running QProcess has little sense. What are you trying to obtain this way? Because the only thing I can think about is that you'll be running bash to execute a script that runs some other programs which are not in the system path - but then you could have set that path directly in the script itself.

Besides, "/home/azhang/env/tool.env" doesn't look like a directory name, it's more likely a file, so setting it to PATH doesn't make sense.

[ChrisW67]

I have ever set the env like : env <<"PATH = /home/azhang/env/tool.env" ,
but the result is same. Why?

The space either side of the "=" sign may cause issues.

env << "TMPDIR=C:\\MyApp\\temp";

env << "TMPDIR=C:\\MyApp\\temp";

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is good and

env << "TMPDIR = C:\\MyApp\\temp";

env << "TMPDIR = C:\\MyApp\\temp";

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is probably not.