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sh: -c: line 0: syntax error near unexpected token `('

by ilans11il (Initiate)
on Nov 27, 2013 at 08:54 UTC ( [id://1064581]=perlquestion: print w/replies, xml ) Need Help??

ilans11il has asked for the wisdom of the Perl Monks concerning the following question:

Hi , Could you please advise , What is wrong with my command: 
$RT_DiffFiles= `comm -23 <(sort $RT_64OG_FilesPath) <(sort $RT_64_File
+sPath)`;

[download]
the error: 
sh: -c: line 0: syntax error near unexpected token `('
sh: -c: line 0: `comm -23 <(sort ./TmpData/RT_64OG_Files) <(sort ./Tmp
+Data/RT_64_Files)'

[download]
the print of the command: 
comm -23 <(sort ./TmpData/RT_64OG_Files) <(sort ./TmpData/RT_64_Files)

[download]
from linux the command is working with no problem... thanks in advanced

Replies are listed 'Best First'.
Re: sh: -c: line 0: syntax error near unexpected token `('
by derby (Abbot) on Nov 27, 2013 at 11:08 UTC

    Looks like sh on your system is not bash (or any shell that supports the process substitution syntax).

    -derby

    Update: You could always force bash: 

    $RT_DiffFiles= `bash -c \"comm -23 <(sort $RT_64OG_FilesPath) <(sort $
+RT_64_FilesPath)\"`;

    [download]
    but I'd look to see if Text::Diff accomplishes what you're after first.

[reply]
[d/l]
Re: sh: -c: line 0: syntax error near unexpected token `('
by oiskuu (Hermit) on Nov 27, 2013 at 17:48 UTC
    Compare FOO=... to $FOO=.... First one assigns to a variable, the latter will expand variable, =, ... parts, then attempt to execute the result.

    In other words, be mindful of where you put the $. 

      RT_DiffFiles=`comm -23 <(sort $RT_64OG_FilesPath) <(sort $RT_64_FilesPath)`;
  echo "$RT_DiffFiles";

    Are you trying to rewrite this as perl code?
[reply]

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