MySQL password input in bash script

bash, linux, mysql, shell, unix

Solution

Check if the password is blank or not, and if it is, then omit the -p switch altogether.

read -p "Enter your MySQL username: " $sqluname
read -sp "Enter your MySQL password (ENTER for none): " $sqlpasswd
if [ -n "$sqlpasswd" ]; then
  /usr/bin/mysql -u $sqluname -p $sqlpasswd << eof
else
  /usr/bin/mysql -u $sqluname << eof
fi

Later edit to avoid a whole if-then-else block:

command="/usr/bin/mysql -u $sqluname"
[ -n "$sqlpasswd" ] && command="$command -p$sqlpasswd"
eval $command

Problem

I have a bash script that needs to perform a couple actions in MySQL. So far I have something like this: ``` #!/bin/sh read -p "Enter your MySQL username: " $sqluname read -sp "Enter your MySQL password (ENTER for none): " $sqlpasswd /usr/bin/mysql -u $sqluname -p $sqlpasswd << eof *some SQL stuff* eof ``` This works well until it's used with a MySQL username that has a blank password. The user hits ENTER at my password prompt, but then they receive another prompt to "Enter your password" again from MySQL. How can I avoid this second password prompt and make the script deal with both blank and non-blank passwords?

Original source