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Top Forums Shell Programming and Scripting Assistance with my Find command to identify last part of a file name and report the name found Post 303041232 by apmcd47 on Tuesday 19th of November 2019 04:20:31 AM
Old 11-19-2019
Quote:
Originally Posted by greavette
Thank you apmcd47 for your helpful reply. I've managed to get the following code working to identify what I need:

Code:
[ -f /var/chef/cache/cookbooks/bootstrap_cookbooks_version_* ] && echo /var/chef/cache/cookbooks/bootstrap_cookbooks_version_* | sed 's/.*version_//'

But what could I add to this code to report that no file was found if a bootstrap_cookbooks_version_* file does not exist?

Thank you.
If you use my second example you could just add a second echo thus:
Code:
f=$(echo/var/chef/cache/cookbooks/bootstrap_cookbooks_version_*) && [ -f "$f" ] && echo ${f##*_} || echo "file does not exist"

In this case the string file does not exist is printed instead of the word red or green. Alternatively look into turning that echo into the instruction you actually want:
Code:
f=$(echo/var/chef/cache/cookbooks/bootstrap_cookbooks_version_*) && [ -f "$f" ] && cat > my_file_is_${f##*_}.txt <<EOT
this will go into the file my_file_is_red.txt
or the file my_file_is_green.txt
only if the file bootstrap_cookbooks_version_red 
(or ..._green) exist!
EOT

Andrew
 

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INTVAL(3)								 1								 INTVAL(3)

intval - Get the integer value of a variable

SYNOPSIS
int intval (mixed $var, [int $base = 10]) DESCRIPTION
Returns the integer value of $var, using the specified $base for the conversion (the default is base 10). intval(3) should not be used on objects, as doing so will emit an E_NOTICE level error and return 1. PARAMETERS
o $var - The scalar value being converted to an integer o $base - The base for the conversion Note If $base is 0, the base used is determined by the format of $var: o if string includes a "0x" (or "0X") prefix, the base is taken as 16 (hex); otherwise, o if string starts with "0", the base is taken as 8 (octal); otherwise, o the base is taken as 10 (decimal). RETURN VALUES
The integer value of $var on success, or 0 on failure. Empty arrays return 0, non-empty arrays return 1. The maximum value depends on the system. 32 bit systems have a maximum signed integer range of -2147483648 to 2147483647. So for example on such a system, intval('1000000000000') will return 2147483647. The maximum signed integer value for 64 bit systems is 9223372036854775807. Strings will most likely return 0 although this depends on the leftmost characters of the string. The common rules of integer casting apply. EXAMPLES
Example #1 intval(3) examples The following examples are based on a 32 bit system. <?php echo intval(42); // 42 echo intval(4.2); // 4 echo intval('42'); // 42 echo intval('+42'); // 42 echo intval('-42'); // -42 echo intval(042); // 34 echo intval('042'); // 42 echo intval(1e10); // 1410065408 echo intval('1e10'); // 1 echo intval(0x1A); // 26 echo intval(42000000); // 42000000 echo intval(420000000000000000000); // 0 echo intval('420000000000000000000'); // 2147483647 echo intval(42, 8); // 42 echo intval('42', 8); // 34 echo intval(array()); // 0 echo intval(array('foo', 'bar')); // 1 ?> NOTES
Note The $base parameter has no effect unless the $var parameter is a string. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.1.0 | | | | | | | Throws E_NOTICE and returns 1, when an object is | | | passed to $var. | | | | +--------+---------------------------------------------------+ SEE ALSO
boolval(3), floatval(3), strval(3), settype(3), is_numeric(3), Type juggling, BCMath Arbitrary Precision Mathematics Functions. PHP Documentation Group INTVAL(3)
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