;;. . .
Execute the first set of commands (
pattern1, execute the second set of commands (
Be sure the last command in each set ends with ;; .
value is typically a positional parameter or other shell variable.
cmds are typically UNIX commands, shell programming commands,
or variable assignments.
Patterns can use file generation metacharacters.
Multiple patterns (separated by |) can be specified on the same line;
in this case, the associated
cmds are executed
value matches any of these patterns.
See below and under eval for examples.
(Note: the Korn shell allows
pattern to be preceded by an optional
open parenthesis, as in (
pattern). It's useful for balancing
parentheses inside a $( ) construct.)
Read first command-line argument and take appropriate action:
case $1 in #match the first arg no|yes) response=1;; -[tT]) table=TRUE;; *) echo "unknown option"; exit 1;; esac
Read user-supplied lines until user exits:
while : # Null command; always true do echo "Type . to finish ==> \c" read line case "$line" in .) echo "Message done" break ;; *) echo "$line" >> $message ;; esac done