Question

我有这个bash代码：

#!/bin/bash



###################################################
# Variables
#
BACKIFS=$IFS
IFS=$'\n'
db_file="$PWD/test"
path_db="$PWD"
check_first_start="$PWD/status"
num_args=$#
###################################################


###################################################
# Fist time that program start
#
function check_before_start(){
if [ ! -f "$path_db/status" ];then
    pass_2=$(yad --form --field "Password:H" --field "Retype Password:H" --separator="@_@" --title "Password" --image="dialog-password")
    if [ $(echo $pass_2 | awk -F"@_@" '{print $1}') != $(echo $pass_2 | awk -F"@_@" '{print $2}') ];then
        yad --title "Errore" --text "Le password sono differenti, riprovare..."
        check_before_start
    fi
    pass=$(echo $pass_2 | awk -F"@_@" '{print $1}')
    touch "$path_db/status"
fi
type_of=$(file $db_file | cut -f2 -d':' | sed '/ /s/^ //' | cut -f1 -d' ')
if [ "$type_of" = "ASCII" ]; then
    pass_2=$(yad --form --field "Password:H" --field "Retype Password:H" --separator="@_@" --title "Password" --image="dialog-password")
    if [ $(echo $pass_2 | awk -F"@_@" '{print $1}') != $(echo $pass_2 | awk -F"@_@" '{print $2}') ];then
        yad --title "Errore" --text "Le password sono differenti, riprovare..."
        check_before_start
    fi
    pass=$(echo $pass_2 | awk -F"@_@" '{print $1}') 
    encrypt_db
fi
}
###################################################


###################################################
# Check exit status
#
function exit_script(){
if [ $? != 0 ] ; then
    type_of=$(file $db_file | cut -f2 -d':' | sed '/ /s/^ //' | cut -f1 -d' ')
    if [ "$type_of" = "ASCII" ]; then
        encrypt_db
    fi
    exit 0
fi
}
###################################################


###################################################
# Encryption functions
#
function encrypt_db(){
echo $pass | gpg --passphrase-fd 0 -o $path_db/enc_db --cipher-algo=aes256 -c $db_file
mv $path_db/enc_db $db_file
}
###################################################


###################################################
# Decryption functions
#
function check_gpg_pwd_decrypt(){
if [ $? != 0 ] ; then
    yad --title "Errore Password" --text "È stata inserita una password errata, riprovare..." --width=450 --height=150
    decrypt_db
fi
}

function decrypt_db(){
pass=$(yad --form --field "Password:H" --separator="" --title "Password" --image="dialog-password")
echo $pass | gpg --passphrase-fd 0 -o $path_db/out_db --cipher-algo=aes256 -d $db_file
check_gpg_pwd_decrypt
mv $path_db/out_db $db_file
}
###################################################


###################################################
# Read data from db
function read_data_from_db(){
choosed_num=$(cat $db_file | sed -n ${line}'p' | cut -f${c1},${c2} -d'.' | tr '.' ' ')
cifra_1=$(echo $choosed_num | cut -f1 -d' ')
cifra_2=$(echo $choosed_num | cut -f2 -d' ')
yad --text "Riga -------><b>${line}</b>\nCifra $c1: --><b>$cifra_1</b>\nCifra $c2: --><b>$cifra_2</b>"
}
###################################################


###################################################
# Read from user the line, c1 and c2 numbers and check these values
#
function input_info(){
info=$(yad --form --field "Numero riga" --field "Prima cifra" --field "Seconda cifra" --separator="-" --title "Input Info")
line=$(echo $info | cut -f1 -d'-')
c1=$(echo $info | cut -f2 -d'-')
c2=$(echo $info | cut -f3 -d'-')
if [ $line -lt 1 ] || [ $line -gt 32 ]; then
    yad --text "Errore: il numero di linea deve essere compreso fra 1 e 32" --title "Errore"
    input_info
fi
if [ $c1 -lt 1 ] || [ $c1 -gt 4 ] || [ $c2 -lt 1 ] || [ $c2 -gt 4 ]; then
    yad --text "Errore: le cifre devono essere comprese fra 1 e 4" --title "Errore"
    input_info
fi
}
###################################################


###################################################
# Main
check_before_start
input_info
decrypt_db
read_data_from_db
encrypt_db
exit 0
###################################################

我遇到了问题，因为如果输入错误的密码，我会收到此错误error: cannot mv file。我不知道为什么，但是这个脚本执行mv命令（在strongpt_db函数内）2次O.o

我无法理解如何修复它以及 decrypt_db 有可能出现此行为。

Answer 1

输入错误密码后，函数check_before_start会再次调用自己。每次调用都会调用encrypt_db来调用mv，然后调用check_before_start，因此会调用两次。由于密码无效，您需要在第二次调用自己之后退出return外部调用（例如使用{{1}}）。

bash函数执行命令mv的2倍

1 个答案: