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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
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RBASH(1)						      General Commands Manual							  RBASH(1)

NAME
rbash - restricted bash, see bash(1) RESTRICTED SHELL
If bash is started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted. A restricted shell is used to set up an environment more controlled than the standard shell. It behaves identically to bash with the exception that the follow- ing are disallowed or not performed: o changing directories with cd o setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV o specifying command names containing / o specifying a file name containing a / as an argument to the . builtin command o specifying a filename containing a slash as an argument to the -p option to the hash builtin command o importing function definitions from the shell environment at startup o parsing the value of SHELLOPTS from the shell environment at startup o redirecting output using the >, >|, <>, >&, &>, and >> redirection operators o using the exec builtin command to replace the shell with another command o adding or deleting builtin commands with the -f and -d options to the enable builtin command o using the enable builtin command to enable disabled shell builtins o specifying the -p option to the command builtin command o turning off restricted mode with set +r or set +o restricted. These restrictions are enforced after any startup files are read. When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script. SEE ALSO
bash(1) GNU Bash-4.0 2004 Apr 20 RBASH(1)
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