The file.csv file content is :
user0001;password0001;user0002;password0002 user0011;password0011;user0012;password0012 ...
And the shell program is just :
{ while IFS=';' read u1 p1 u2 p2; do imapsync --user1 $u1 --password1
$p1 --user2 $u2 --password2 $p2 ... done ; } < file.csv
Better than the above while read loop is the use of Bash's builtin
readarray as it allows to avoid spawning a sub-shell and therefore variable
assignments from inside the loop work.