Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

The particular characters that you need to escape are dependent upon the shell, not on perl. For the most part, you can just encase the perl string to be evaluated in single quotes in a unix shell, and make sure that you don't use single quotes in your perl. (I don't know about windows quoting) :

perl -e 'whatever to execute;'

You can also use -l (that's a lower case L), so you can send a command quickly without the shell messing with it. (but again, this won't work in the times when you want the shell to do its magic, and it also keeps you from using the shell's abilities to repeat the command).

If there are times when you want to use shell variables in your line, you can either export them and reference them in perl as $ENV{"NAME"} rather than $NAME or you can end the quoting, use the variable, and then start it back up again:

perl -e 'print "you are logged in as $ENV{USER}\n";' perl -e 'print "you are logged in as '$USER'\n";'

The only thing that's really tricky is when you're trying to mix perl and shell commands ... which I'd advise not doing from the shell, as you can't always be sure of the output, and calling it from within perl.


In reply to Re: Escaping characters in one-liners by jhourcle
in thread Escaping characters in one-liners by Willworker

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others musing on the Monastery: (2)
As of 2021-06-19 21:27 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    What does the "s" stand for in "perls"? (Whence perls)












    Results (93 votes). Check out past polls.

    Notices?