Shell string Truncation

Shell string truncation rules: • $ {# parameter} gets the string length. • $ {parameter % word} captures word at the end of the string at a minimum. • $ {parameter % word} captures word at the end of the string to the maximum extent. • $ {parameter # word} captures word at least from the front • $ {parameter # word} to the maximum extent from the front

I wrote a small program. For shell string truncation, save it to prevent forgetting:

!/bin/bash    #|--------------------------------------|  #|Author: Liwenta                       |  #|Email:  email.tata@qq.com             |  #|Date:   2013-01-05                    |  #|--------------------------------------|    str="/project/mkdemo/src"  echo '${str}='${str}  echo '${#str}='${#str}    tmp=`dirname ${str}`  echo 'dirname ${str}='${tmp}    tmp=`basename ${str}`  echo 'basename ${str}='${tmp}    tmp=${str#*/}  echo '${str#*/}='${tmp}    tmp=${str##*/}  echo '${str##*/}='${tmp}    tmp=${str%/*}  echo '${str%/*}='${tmp}  

Running result:

[root@tata.domain /andes/shell/string]#./ph.sh    ${str}=/project/mkdemo/src  ${#str}=19  dirname ${str}=/project/mkdemo  basename ${str}=src  ${str#*/}=project/mkdemo/src  ${str##*/}=src  ${str%/*}=/project/mkdemo  ${str%%/*}=