while read loop -- where we read values from each line of input (from /etc/passwd into seven variables per line. This allows us to use any of these fields that w... ipt is evaluated. Its purpose is to store command line arguments in the global array ARGV1 and the number of command line arguments in the global variable ARGC1.
The glob... l variable ARGC1 are supposed to hold the command line arguments and the number of command line arguments. Non-option arguments are left in the g... set to zero: fills the global variable ARGV with lines from stdin. If the global variable mbfl_option_NULL is set to yes: lines are read using the null character as terminator,
