Ginger Cheng wrote:
Hello, PHP gurus,
I have a command that I want to run using system function. The
command exploits temporary named pipes in the place of temporary files.
my command is
paste <(cut -f1 file1) <(cut -f2 file2) > final_file
It works perfectly well if I just type it in my interactive
shell. But if I do a
<?php $cmd = " paste <(cut -f1 file1) <(cut -f2 file2) >
final_file";
system($cmd);
?>
I got the syntax error msg as
"sh: -c: line 1: syntax error near unexpected token `('". I have tried
I notice that the 'sh' shell is being used according to your error output,
I'm guessing that maybe your interactive shell is running something like 'bash'
and that this discrepency might the root cause of the problem. just a guess -
I don't know how you would define another shell for php to use either :-/.
another thing to try is the backticks operator, as described on the following
page:
http://php.net/manual/en/language.operators.execution.php
to 'escapeshellcmd' the command and run it in system, then I got
paste: invalid option -- f
Try `paste --help' for more information.
Also tried exec. I really want to take advantage of the
temporary named pipes so I don't have to worry about the temporary files
generated. I've been googling around without much help. Could anyone
plz give me some hint? Thanks a lot
ginger
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