Piping Input to read
Apress eBooks · 2009
This chapter deals with a gotcha that I came across while porting a script from ksh to bash. It was a gotcha only because at the time I wasn’t aware of a fairly crucial difference in the behavior of the two shells. In both pdksh and bash, the last command of a pipeline is performed in a subshell. This means that a variable assigned within the subshell is not available to the parent shell. In ksh, the last command of a pipeline is executed in the original shell.