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Full Discussion: Df -h results in a loop
Top Forums Shell Programming and Scripting Df -h results in a loop Post 302973669 by Aia on Thursday 19th of May 2016 10:13:18 PM
Old 05-19-2016
Quote:
Originally Posted by Abu Rayane
Thank you guys for your effort, but I found a little mistake in cero code:




This is the mistake

Code:
str.sh: line 8: syntax error near unexpected token `<'
str.sh: line 8: `done < <(df -h | awk 'NR>2 { print $1 " " $5 }')'

Only Bash, Zsh and Ksh93 supports process substitution, which is what the <(...) means. Since you are invoking it with sh, judging by this # sh disk.sh , I suggest you use the command grouping

Here's an example using your original post #1

Code:
df -h | awk 'NR>2 { print $1 " " $5 }' |
{
    while read output
    do
        res=$(echo $output | awk '{ print $2}')
        useSpPer=${useSpPer}'-'$res

        echo 'use '$useSpPer
        echo 'res '$res
    done
    echo 'final '$useSpPer
}

This User Gave Thanks to Aia For This Post:
 

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PG_FIELD_SIZE(3)														  PG_FIELD_SIZE(3)

pg_field_size - Returns the internal storage size of the named field

SYNOPSIS
int pg_field_size (resource $result, int $field_number) DESCRIPTION
pg_field_size(3) returns the internal storage size (in bytes) of the field number in the given PostgreSQL $result. Note This function used to be called pg_fieldsize(3). PARAMETERS
o $result - PostgreSQL query result resource, returned by pg_query(3), pg_query_params(3) or pg_execute(3) (among others). o $field_number - Field number, starting from 0. RETURN VALUES
The internal field storage size (in bytes). -1 indicates a variable length field. FALSE is returned on error. EXAMPLES
Example #1 Getting information about fields <?php $dbconn = pg_connect("dbname=publisher") or die("Could not connect"); $res = pg_query($dbconn, "select * from authors where author = 'Orwell'"); $i = pg_num_fields($res); for ($j = 0; $j < $i; $j++) { echo "column $j "; $fieldname = pg_field_name($res, $j); echo "fieldname: $fieldname "; echo "printed length: " . pg_field_prtlen($res, $fieldname) . " characters "; echo "storage length: " . pg_field_size($res, $j) . " bytes "; echo "field type: " . pg_field_type($res, $j) . " "; } ?> The above example will output: column 0 fieldname: author printed length: 6 characters storage length: -1 bytes field type: varchar column 1 fieldname: year printed length: 4 characters storage length: 2 bytes field type: int2 column 2 fieldname: title printed length: 24 characters storage length: -1 bytes field type: varchar SEE ALSO
pg_field_prtlen(3), pg_field_type(3). PHP Documentation Group PG_FIELD_SIZE(3)
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