I'm trying to modify a script that read usernames/password from a file which is like this:
user1 pass1
user2 pass2
user3 pass3
I can't get the script to read the space between the users and pass. What can I use to delimit this space? This is my code:
for row in `cat $1`
do
if [ $(id -u) -eq 0 ]; then
username=${row%:*}
password=${row#*:}
#echo $username
#echo $password
I know I have to change the stuff in ${row%: } and ${row%: }
What do I have to put so it sees the space between user1 pass1 ?
It would be easier to split the two fields as you read each line. You can do that with read
. It's also better to use a while
loop here (a for loop requires to play with $IFS
and it would also load the entire file in memory):
#!/bin/bash
if [ "$EUID" -ne 0 ]; then
echo >&2 "You are not root"
exit 1
fi
while read -r username password; do
# do the useradd stuff here
done < "$1"
Notice that I also changed $(id -u)
to $UID
which should be faster since it does not invoke an external program.
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