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Full Discussion: Problems passing shell arguments to perl
Top Forums Shell Programming and Scripting Problems passing shell arguments to perl Post 302887127 by MadeInGermany on Wednesday 5th of February 2014 10:21:20 PM
Old 02-05-2014
Your shell variables should appear in double quotes outside of single quotes. In this simple case you can do
Code:
perl -pi -e "s/$1/$2/g" `find ./ -name *.html`

More complex perl code should be in single quotes, but ending around the shell variables as follows:
Code:
perl 'print $perlvar,"'"$shellvar"'",$perlvar;'

The shell sees 3 strings and does variable substitution in the middle string because it is in double quotes.
--
This won't work if the file names have space characters, or can result in 'too many arguments' if there are many files.
Safer is
Code:
find ./ -name *.html -exec perl -pi -e "s/$1/$2/g" {} +

Last edited by MadeInGermany; 02-07-2014 at 08:45 AM.. Reason: highlighted with colors
This User Gave Thanks to MadeInGermany For This Post:
johnny_canucl
 

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LEARN ABOUT V7

set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
       cyan, white and normal.

       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

       o -h, --help Display help message and exit

       o -o, --bold Set bold or extra bright mode

       o -u, --underline Set underlined mode

       o -v, --version Display version and exit

       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

       Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey
       font color, while set_color --bold white will result in a white font color.

       Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator.

       set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and
       incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of
       ncurses and recompile fish against it in order to fix this issue.

Version 1.23.1							  Sun Jan 8 2012						      set_color(1)
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