Questo script rende tutte le directory eseguibili o non eseguibili in modo ricorsivo (Serve specialmente quando abbiamo sbagliato a giocare con chmod).

http://www.slacky.eu/misto/concorso/nitrogl/dirx.sh
La versione qui sotto è più aggiornata di quella presente in questo link.

#!/bin/bash
# ======================================================================
#    Date : Cagliari, 14 october 2007
#  Author : Roberto Paolo Antonio Metere
# ======================================================================
#
# This script recursively makes all directories (not)executable by: a u g o
#
dir=""
permtype=""
firstp="false"
verbose=0
arg[0]="$0"
arg[1]="$1"
arg[2]="$2"
arg[3]="$3"
arg[4]="$4"

# Permissions
permissions="u+ g+ o+ ug+ gu+ go+ og+ uo+ ou+ ugo+ uog+ oug+ ogu+ gou+ guo+ a+ u- g- o- ug- gu- go- og- uo- ou- ugo- uog- oug- ogu- gou- guo- a-"
numpermissions=0
for i in $permissions
do
  numpermissions=$(($numpermissions + 1))
done

# Error function. It will return to the shell if any error occurs
Error ()
{
error_code="$1"
ERRORS[0]="no errors occurred"
ERRORS[1]="too many arguments given"
ERRORS[2]="no argument given"
ERRORS[3]="wrong permission type or directory does not exists"
ERRORS[4]="missing permission type"
ERRORS[5]="argument after the permission string detected.\n (You cannot exchange the order of the syntax)"

if [ "$error_code" -gt "0" ]
then

# Print internal error and usage
  printf "\n ERROR: ${ERRORS[$error_code]}."
  printf "\n Syntax: ${arg[0]} [-v] [directory] permissiontype\n"
  printf "\n               -v : if you want the script more verbose"
  printf "\n                    it could be only the first argument\n"
  printf "\n        directory : target directory. You can omit the"
  printf "\n                    directory: the default one is the"
  printf "\n                    current. Must be BEFORE permissiontype\n"
  printf "\n  permission type : should be any of the follows"
  printf "\n                    u+ g+ o+ ug+ gu+ go+ og+ uo+ ou+ ugo+"
  printf "\n                    uog+ oug+ ogu+ gou+ guo+ a+ u- g- o-"
  printf "\n                    ug- gu- go- og- uo- ou- ugo- uog- oug-"
  printf "\n                    ogu- gou- guo- a-"
  printf "\n                    Where u means user"
  printf "\n                          g means group"
  printf "\n                          o means others"
  printf "\n                          a means all (ugo)"
  printf "\n                          + means executable"
  printf "\n                          - means not-executable\n\n"

# Exit
  exit 1

else
  printf "\n ERROR: ${ERRORS[$error_code]}.\n\n"
fi
}

# Verbose or not
if [ "${arg[1]}" == "-v" ]
then
  verbose=1
  arg[1]="${arg[2]}"
  arg[2]="${arg[3]}"
  arg[3]="${arg[4]}"
fi

# Welcome screen
if [ "$verbose" -eq "1" ]
then
  printf "\n ========================================================="
  printf "\n   Makes directories executable recursively - by NitroGL "
  printf "\n =========================================================\n\n"
fi

# check the third argument (too many arguments)
if [ "${arg[3]}" != "" ]
then
  Error 1
fi

# check the first argument
if [ "${arg[1]}" != "" ]
then
  if test -d "${arg[1]}"
  then

    if [ "$verbose" -eq "1" ]
    then
      printf "\n First argument accepted: directory" # VERBOSITY
    fi

    dir="${arg[1]}"
    firstp="false"

  else
    i=1
    while [ "$i" -le "$numpermissions" ]
    do
      if [ "${arg[1]}" == "`echo "$permissions" | awk '{print $'$i'}'`" ]
      then

        if [ "$verbose" -eq "1" ]
        then
          printf "\n First argument accepted: permission"
        fi

        permtype="${arg[1]}"x
        firstp="true"
        i=$(($numpermissions + 1))
      fi
      i=$(($i + 1))
    done

    if [ "$permtype" == "" ]
    then
      Error 3
    fi
  fi
else
  Error 2
fi

# check the second argument
if [ "$firstp" == "false" ]
then
  i=1
  while [ "$i" -le "$numpermissions" ]
  do
    if [ "${arg[2]}" == "`echo "$permissions" | awk '{print $'$i'}'`" ]
    then

      if [ "$verbose" -eq "1" ]
      then
        printf "\n Second argument accepted: permission"
      fi

      permtype="${arg[2]}"x
      i=$(($numpermissions + 1))
    fi
    i=$(($i + 1))
  done

  if [ "$permtype" == "" ]
  then
    Error 4
  fi

else
  if [ "${arg[2]}" != "" ]
  then
    Error 1
  fi
fi

# setting the directory "." if non specified
if [ "$dir" == "" ]
then
  dir="."

  if [ "$verbose" -eq 1 ]
  then
    printf "\n Default directory: current directory"
  fi
fi

# if all right, work!
chmod "$permtype" "$dir";
find "$dir" -type d -exec chmod "$permtype" {} \;

if [ "$verbose" -eq "1" ]
then
  Error 0
fi

exit 0
#
# Copyright (c) Roberto Metere

• Data: 21/10/2007
• Autore: Nitrogl