Here's the breakdown of that last confusing line:. Thus, the text effectively joins four groups of characters one with nothing, however : Tim says, is the first, wrapped to escape the spaces "Hi! As you can see, the double-quote group wrapping nothing is still necessary since, without it, the following double-quote would open up a double-quoted group instead of acting as plain-text.
From this, it should be recognizable that therefore, inside and outside quotes, three double-quotes act as a plain-text unescaped double-quote:. Therefore, three quotes can always be reliably used as an escape. However, in understanding it, you may note that the four quotes at the end can be reduced to a mere two since it technically is adding another unnecessary empty double-quoted group.
Final note: I did not read any of this from any tutorial - I came up with all of it by experimenting. Therefore, my explanation may not be true internally. Nonetheless all the examples above evaluate as given, thus validating but not proving my theory.
I cannot quickly reproduce the symptoms: if I try myscript '"test"' with a batch file myscript. The 2nd document quoted by Peter Mortensen in his comment on the answer of Codesmith made things much clearer for me. That document was written by windowsinspired.
If you want other characters with special meaning to the Windows command shell e. If instead foo interprets a doubled double quote "" as a literal double quote, then start your program as. The key insight from the quoted document is that, to the Windows command shell, an unescaped double quote triggers switching between two possible states.
In the other state, redirection is not recognized and a caret does not escape a double quote and isn't removed. Let's refer to these states as 'outside' and 'inside', respectively. If you want to redirect the output of your command, then the command shell must be in the outside state when it reaches the redirection, so there must be an even number of unescaped by caret double quotes preceding the redirection.
The only way that hopefully always works is to keep the command shell always in the outside state, because then redirection works. If you don't need redirection or other characters with special meaning to the command shell , then you can do without the carets. Now -- finally -- to the original question. Apparently myscript interprets the single and double quotes as argument delimiters and removes them. I'm calling powershell from cmd, and passing quotes and neither escapes here worked.
The grave accent worked to escape double quotes on this Win 10 surface pro. Using another quote to escape a quote resulted in no quotes. As you can see, the characters themselves got typed, but didn't escape the double quotes.
Well you don't:. Inconsistency at its glance. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Escape double quotes in parameter Ask Question. Asked 10 years, 3 months ago. Active today. The arcane absurdity and inconsistency of the Windows command line never fails to anger me. Who designed this junk?
Oh, the hours wasted over the years! Unix is so easy and makes so much sense in comparison. Show 2 more comments. Then maybe the answers to this question might help you further?
I never would have guessed it was wscript 's fault! Leave it to Windows : — Software. Windows: the OS where globbing, shell expansion, and parameter unescaping is performed by the executable being invoked instead of the shell.
You never know which convention, if any, the invoked executable honours. Valuable input: blogs. The caret is indeed the escape character of choice for cmd.
Show 5 more comments. Try this: myscript """test""" "" escape to a single " in the parameter. That's not quite correct. Try myscript """test test""" and it doesn't work first parameter is handed over as "test. Acutally, you need three quotes: myscript """"test test"" The third quote at the end can be skipped, though.
Can someone help? Thank you. Louis Strous Louis Strous 8 8 silver badges 14 14 bronze badges. I was beating my head on the wall trying to run a vbscript with cmd prompt text being echoed into cmd prompt text - I inherited this - and could not figure out a way to escape the quotes. Iow it is not entirely shell only. Zimba Zimba 1, 12 12 silver badges 17 17 bronze badges. Martin Braun Martin Braun 7, 8 8 gold badges 51 51 silver badges 89 89 bronze badges.
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