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program_lang:bash [2023/04/13 16:25] manu |
program_lang:bash [2024/04/17 16:06] (current) manu |
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====== BASH ====== | ====== BASH ====== | ||
+ | |||
+ | ===== IF ===== | ||
+ | |||
+ | if or compare text | ||
+ | if [ "$fname" = "a.txt" ] || [ "$fname" = "c.txt" ] | ||
+ | if [ $a == $b -o $b == $c -o $a == $c ] | ||
+ | | ||
+ | if and | ||
+ | if [ $a == $b -a $b == $c -a $a == $c ] | ||
+ | if [ "$fname" = "a.txt" ] && [ "$fname" = "c.txt" ] | ||
===== Use CSV file ===== | ===== Use CSV file ===== | ||
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arr=( $(ls) ) Save ls output as an array of files | arr=( $(ls) ) Save ls output as an array of files | ||
${arr[@]:s:n} Retrieve n elements starting at index s | ${arr[@]:s:n} Retrieve n elements starting at index s | ||
+ | |||
+ | Exemple | ||
+ | <cli prompt='#'> | ||
+ | #!/usr/bin/bash | ||
+ | declare -a Users=('user01' '1001' '1000' '' '' '/bin/bash') | ||
+ | Users+=('user02' '1002' '1003' '' '' '/bin/bash') | ||
+ | Users+=('user03' '1003' '4' 'Recovery user' '' '/bin/bash') | ||
+ | |||
+ | UserNbProps=6 | ||
+ | let NbUsers=${#Users[@]}/$UserNbProps | ||
+ | |||
+ | for (( i=0; i<$NbUsers; i++ )) | ||
+ | do | ||
+ | let ArrayIndex=i*UserNbProps | ||
+ | Line=$(cat /etc/passwd | grep "^${Users[$ArrayIndex]}:") | ||
+ | if [ -z "$Line" ] | ||
+ | then | ||
+ | echo "# ${Users[$ArrayIndex]} user was not found" | ||
+ | else | ||
+ | Uid=$(echo $Line | cut -d: -f3) | ||
+ | Gid=$(echo $Line | cut -d: -f4) | ||
+ | UidRef=${Users[$ArrayIndex+1]} | ||
+ | GidRef=${Users[$ArrayIndex+2]} | ||
+ | if [ $Uid != $UidRef -o $Gid != $GidRef ] | ||
+ | then | ||
+ | echo "# User: ${Users[$ArrayIndex]} uid:$Uid gid:$Gid does not match reference uid:$UidRef gid:$GidRef" | ||
+ | fi | ||
+ | fi | ||
+ | done | ||
+ | </cli> | ||
| | ||
===== Read files ===== | ===== Read files ===== |