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Full Discussion: A $(( expression )) bug?
Top Forums UNIX for Advanced & Expert Users A $(( expression )) bug? Post 302982691 by wisecracker on Sunday 2nd of October 2016 07:25:00 AM
Old 10-02-2016
Quote:
Originally Posted by MadeInGermany
Just had a first look at shellcheck.
It looks like it makes suggestions in addition to the real faults that are found by sh -nx
Well here is the code that shellcheck checked:-
Code:
Last login: Sun Oct  2 11:18:10 on ttys000
AMIGA:barrywalker~> cd Desktop/Code/Shell
AMIGA:barrywalker~/Desktop/Code/Shell> cat BUG1.sh
#!/bin/sh
txt="12345"
echo "$(( # == txt ))"
echo "$(( $# == txt ))"
echo "$(( $# == $txt ))"
echo "$(( # == $txt ))"
echo "$(( # = txt ))"
echo "$(( $# = txt ))"
echo "$(( $# = $txt ))"
echo "$(( # = $txt ))"
AMIGA:barrywalker~/Desktop/Code/Shell> sh -n BUG1.sh
AMIGA:barrywalker~/Desktop/Code/Shell> bash -n BUG1.sh
AMIGA:barrywalker~/Desktop/Code/Shell> _

And I decided to [ba]sh -n BUG1.sh and it says it is syntactically correct.
Again /Me shrugs...
Have I discovered a general SHELL bug, although esoteric is STILL a bug?
Are these arithmetic related ERRORs capable of being hacked from the outside?
(I have no idea as I am a mere amateur.)
Why in fact does bash -n NOT pick it up on at least my OSX 10.11.6 version of 'bash'?
 

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ZIPARCHIVE.OPEN(3)							 1							ZIPARCHIVE.OPEN(3)

ZipArchive::open - Open a ZIP file archive

SYNOPSIS
mixed ZipArchive::open (string $filename, [int $flags]) DESCRIPTION
Opens a new zip archive for reading, writing or modifying. PARAMETERS
o $filename - The file name of the ZIP archive to open. o $flags - The mode to use to open the archive. o ZipArchive::OVERWRITE o ZipArchive::CREATE o ZipArchive::EXCL o ZipArchive::CHECKCONS RETURN VALUES
o $Error codes - Returns TRUE on success or the error code. o ZipArchive::ER_EXISTS File already exists. o ZipArchive::ER_INCONS Zip archive inconsistent. o ZipArchive::ER_INVAL Invalid argument. o ZipArchive::ER_MEMORY Malloc failure. o ZipArchive::ER_NOENT No such file. o ZipArchive::ER_NOZIP Not a zip archive. o ZipArchive::ER_OPEN Can't open file. o ZipArchive::ER_READ Read error. o ZipArchive::ER_SEEK Seek error. EXAMPLES
Example #1 Open and extract <?php $zip = new ZipArchive; $res = $zip->open('test.zip'); if ($res === TRUE) { echo 'ok'; $zip->extractTo('test'); $zip->close(); } else { echo 'failed, code:' . $res; } ?> Example #2 Create an archive <?php $zip = new ZipArchive; $res = $zip->open('test.zip', ZipArchive::CREATE); if ($res === TRUE) { $zip->addFromString('test.txt', 'file content goes here'); $zip->addFile('data.txt', 'entryname.txt'); $zip->close(); echo 'ok'; } else { echo 'failed'; } ?> PHP Documentation Group ZIPARCHIVE.OPEN(3)
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