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Added specials and error checking

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Your Name 2020-05-29 23:54:14 -04:00
parent 54ab2ca3bb
commit 8752b402d8
1 changed files with 40 additions and 14 deletions
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54
share/adapters/chmod.sh
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@ -3,6 +3,7 @@
# Contributed by Erez Binyamin (github.com/ErezBinyamin)
# Translate between chmod string and number
# Inspired by http://permissions-calculator.org/
# Contrib to chubin - cheat.sh
chmod_calc(){
p_s=""
@ -10,23 +11,42 @@ chmod_calc(){
R=()
W=()
X=()
S=()
setuid=' '
setgid=' '
sticky=' '
# If permission number is given calc string
if [[ $1 =~ ^-?[0-9]+$ ]]
if [[ $1 =~ ^-?[0-9]+$ ]] && [ ${#1} -ge 2 ] && [ ${#1} -le 4 ]
then
p_n=$1
for (( i=0; i<${#1}; i++ ))
do
num=$(echo "obase=2;${1:$i:1}" | bc | xargs printf '%03d')
[ ${num:0:1} -eq 1 ] && p_s+='r' || p_s+='-'
[ ${num:1:1} -eq 1 ] && p_s+='w' || p_s+='-'
[ ${num:2:1} -eq 1 ] && p_s+='x' || p_s+='-'
[ ${num:0:1} -eq 1 ] && R+=('X') || R+=(' ')
[ ${num:1:1} -eq 1 ] && W+=('X') || W+=(' ')
[ ${num:2:1} -eq 1 ] && X+=('X') || X+=(' ')
if [ ${#1} -eq 4 ] && [ $i -eq 0 ]
then
[ ${num:0:1} -eq 1 ] && setuid='X' || setuid=' '
[ ${num:1:1} -eq 1 ] && setgid='X' || setgid=' '
[ ${num:2:1} -eq 1 ] && sticky='X' || sticky=' '
else
[ ${num:0:1} -eq 1 ] && p_s+='r' || p_s+='-'
[ ${num:1:1} -eq 1 ] && p_s+='w' || p_s+='-'
if [[ $sticky == 'X' ]]
then
[ ${num:2:1} -eq 1 ] && p_s+='s' || p_s+='S'
else
[ ${num:2:1} -eq 1 ] && p_s+='x' || p_s+='-'
fi
[ ${num:0:1} -eq 1 ] && R+=('X') || R+=(' ')
[ ${num:1:1} -eq 1 ] && W+=('X') || W+=(' ')
[ ${num:2:1} -eq 1 ] && X+=('X') || X+=(' ')
fi
done
# If permission string is given calc number
else
elif [ ${#1} -le 9 ] && [ $(( ${#1} % 3 )) -eq 0 ] && [[ $1 =~ ^[r,w,x,s,S,-]+$ ]]
then
p_s=$1
[[ ${p_s,,} =~ 's' ]] && p_n+="1" || p_n+="0"
[[ ${p_s,,} =~ 's' ]] && sticky='X'
for (( i=0; i<${#1}; i+=0 ))
do
num=0
@ -36,20 +56,26 @@ chmod_calc(){
[[ ${1:$i:1} == 'w' ]] && W+=('X') || W+=(' ')
[[ ${1:$((i++)):1} == 'w' ]] && let num++
num=$(( num << 1 ))
[[ ${1:$i:1} == 'x' ]] && X+=('X') || X+=(' ')
[[ ${1:$((i++)):1} == 'x' ]] && let num++
[[ 'xs' =~ ${1:$i:1} ]] && X+=('X') || X+=(' ')
[[ 'Ss' =~ ${1:$i:1} ]] && S+=('X') || S+=(' ')
[[ 'xs' =~ ${1:$((i++)):1} ]] && let num++
p_n+="$num"
done
else
printf "Invalid permissions string: $1"
return 1
fi
# Print Final results table
printf "
Linux Permissions String:\t${p_s}
Linux Permissions Number:\t${p_n}
Owner\t\tGroup\t\tPublic
Special\t\tOwner\t\tGroup\t\tPublic
Setuid [$setuid]\tRead [${R[0]}]\tRead [${R[1]}]\tRead [${R[2]}]
Setgid [$setgid]\tWrite [${W[0]}]\tWrite [${W[1]}]\tWrite [${W[2]}]
Sticky bit [$sticky]\tExecute [${X[0]}]\tExecute [${X[1]}]\tExecute [${X[2]}]
Read [${R[0]}]\tRead [${R[1]}]\tRead [${R[2]}]
Write [${W[0]}]\tWrite [${W[1]}]\tWrite [${W[2]}]
Execute [${X[0]}]\tExecute [${X[1]}]\tExecute [${X[2]}]
"
}