I have to pass the input as arrays yes and i did make a typo near the echo
yes the echo at the end is outside the loop so it will only print out the last row i think
issue is even if i pass the target as variable the code is only picking the first value passed generating the md5 and outputting the md5 for that line. I am trying to figure out how can i loop through all the columns passed inside the array and concatenate them using, and then calculate their md5 and then write it back to the file as a new column.
I know its a strange requirement Please point me to the write direction
I m trying something like this with no avail
Code:
#!/usr/bin/sh
target=("id,name")
target_idx=() # the column number of that field
{
# reading header.
for i in $(echo $target | sed "s/,/ /g");do # trying to pass the comma seperated values inside target variable
IFS=, read -r -a header
for idx in "${!header[@]}"; do # and look for the target field in it
[[ ${header[$idx]} = $target ]] && { target_idx=$idx; break; }
done
done
# then, iterate over lines
while IFS=, read -r -a line; do
a=$(echo -n ${line[$target_idx]}|md5sum)
echo "$line"
done
}
Moderator's Comments:
edit by bakunin: i think you posted this to the wrong thread. Pushing it to the right one.
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Discussion started by: balu1234
2 Replies
LEARN ABOUT DEBIAN
iptables-apply
iptables-apply(8) System Manager's Manual iptables-apply(8)NAME
iptables-apply - a safer way to update iptables remotely
SYNOPSIS
iptables-apply [-hV] [-t timeout] ruleset-file
DESCRIPTION
iptables-apply will try to apply a new ruleset (as output by iptables-save/read by iptables-restore) to iptables, then prompt the user
whether the changes are okay. If the new ruleset cut the existing connection, the user will not be able to answer affirmatively. In this
case, the script rolls back to the previous ruleset after the timeout expired. The timeout can be set with -t.
When called as ip6tables-apply, the script will use ip6tables-save/-restore instead.
OPTIONS -t seconds, --timeout seconds
Sets the timeout after which the script will roll back to the previous ruleset.
-h, --help
Display usage information.
-V, --version
Display version information.
SEE ALSO iptables-restore(8), iptables-save(8), iptables(8).
LEGALESE
iptables-apply is copyright by Martin F. Krafft.
This manual page was written by Martin F. Krafft <madduck@madduck.net>
Permission is granted to copy, distribute and/or modify this document under the terms of the Artistic License 2.0.
2006-06-04 iptables-apply(8)
11-10-2018
