I'm trying to read a part of a file name to make it in an if .. else statement
for example :
file name : foo_bar_test1_example.stat
I want to do a test; if the word : example exists in the file name , then there are some scripts to execute.
Thanks in advance :)
case is the construct for that in shells of the Bourne family (Bourne, Almquist, ksh, bash, zsh, yash...):
case $file in
*example*) do-something-for-example "$file";;
*) do-something-else-if-not "$file";;
esac
In shells of the csh family (csh, tcsh):
switch ($file:q)
case *example*:
do-something-with $file:q
breaksw
default:
do-something-else-with $file:q
breaksw
endsw
In the fish shell:
switch $file
case '*example*'
do-something-with $file
case '*'
do-something-else-with $file
end
With rc or aganga:
switch ($file) {
case *example*
do-something-with $file
case *
do-something-else-with $file
}
With es:
if {~ $file *example*} {
do-something-with $file
} {
do-something-else-with $file
}
With bash you can do as follows:
#!/bin/bash
#let's look for an a in our handful of files
string="a"
for file in aa ab bb cc dd ad ; do
#note the placement of the asterisks and the quotes
#do not swap file and string!
if [[ "$file" == *"$string"* ]] ; then
echo "$string in $file"
else
echo "no match for $file"
fi
done
EDIT: simplification with bash's regex matching, as suggested by @JeffSchaller:
if [[ "$file" =~ $string ]] ; then
if [[ "$file" =~ example ]]; then echo found; else echo not found; fi
bash. The [[ string == pattern ]] comes from ksh and is available in bash, ksh and zsh, [[ string =~ regexp ]] comes from bash and is available in bash, ksh93 and zsh. However note that with bash 3.1 and below and zsh $string would be considered as a regexp.