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Re^2: Issue with env variables set through dos batch

by ikegami (Pope)
on Oct 13, 2011 at 16:48 UTC ( #931316=note: print w/replies, xml ) Need Help??

in reply to Re: Issue with env variables set through dos batch
in thread Issue with env variables set through dos batch

In almost all cases, forward slash, '/' works like '\'.

That's pushing it. It's true in Perl (since the Windows API accepts "/"), but not so much in the shell (because "/" is the command line option starter, and it doesn't need to be preceded by whitespace). For example, dir /users won't work.

That said, if you place the path in quotes, "/" is much more likely to get accepted. For example, dir "/users" does work.

This is only relevant if $pathSeparator is used to build shell commands, which is possible. It's hard to tell, since $pathSeparator isn't actually used in the posted snippet.

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Re^3: Issue with env variables set through dos batch
by Marshall (Abbot) on Oct 15, 2011 at 16:47 UTC
    Yes, there are issues with \ vs / in Windows. I think that there are things like '\' is needed on a path to an .exe.

    In Perl code, using "/" in a Perl function almost always or at least I don't know of a case where it does not. But YES, there are cases where Windows itself is pretty finicky about this. Yes, I would quote a path, like "/file", because there are even more lexical pitfalls like "divided" by file!

    Without spending hours thinking about it, I cannot cover every single case. My method is simplistic, I write something that "feels right" and if it is wrong, I try again and then verify that the new formulation is "right". It just seems like when I think I've learned everything about it, I get bit with a new wrinkle when dealing with this \ and / Windows command line stuff! I think that is just the nature of the beast.

    Anyway, I post my code and learn things. Thanks!

      >/progs/perl5140-ap1400/bin/perl -E"say 'ok'" ok

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