411 REFERENCE · Wikibooks
C Shell Scripting/snippets
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
String manipulation
How to lower and upper case a string using the tr command.
#!/bin/csh -f
set DS = \$
alias lower tr 'A-Z' 'a-z'
alias upper tr 'a-z' 'A-Z'
alias rot13 "tr 'A-M N-Z a-m n-z' 'N-Z A-M n-z a-m'"
alias ltrim "sed 's/^[ \t\n\r]*//'"
alias rtrim "sed 's/[ \t\n\r]*$DS//'"
alias trim "sed 's/^[ \t\n\r]*//;s/[ \t\r\n]*$DS//'"
echo Hello | lower
echo Hello | upper
echo Hello | rot13
echo " yabba dabba do" | rtrim
set HELLO = " hELLO "
if ( `echo $HELLO | lower | trim` == "hello" ) then
echo "match"
endif