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05b3d85c93
Show the system time when starting to change the time. Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
74 lines
1.9 KiB
Bash
Executable File
74 lines
1.9 KiB
Bash
Executable File
#!/bin/bash
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#change time using hwclock and date -s
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clear
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echo "The system time is: $(date "+%Y-%m-%d %H:%M:%S %Z")"
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echo
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echo "Please enter the current date and time in UTC"
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echo "To find the current date and time in UTC, please check https://time.is/UTC"
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echo
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get_date () {
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local field_name min max
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field_name="$1"
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min="$2"
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max="$3"
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echo -n "Enter the current $field_name [$min-$max]: "
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read -r value
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echo
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#must be a number between $2 and $3
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while [[ ! $value =~ ^[0-9]+$ ]] || [[ ${value#0} -lt $min ]] || [[ ${value#0} -gt $max ]];
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do
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echo "Please try again, it must be a number from $min to $max."
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echo -n "Enter the current $field_name [$min-$max]: "
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read -r value
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echo
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done
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# Pad with zeroes to length of maximum value.
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# The "$((10#$value))" is needed to handle 08 and 09 correctly, which printf
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# would otherwise interpret as octal. This effectively strips the leading
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# zero by evaluating an arithmetic expression with the base set to 10.
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value="$(printf "%0${#max}u" "$((10#$value))")"
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}
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enter_time_and_change()
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{
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get_date "year" "2024" "2200"
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year=$value
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get_date "month" "01" "12"
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month=$value
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get_date "day" "01" "31"
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day=$value
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get_date "hour" "00" "23"
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hour=$value
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get_date "minute" "00" "59"
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min=$value
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get_date "second" "00" "59"
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sec=$value
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if ! date -s "$year-$month-$day $hour:$min:$sec" &>/dev/null; then
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return 1
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fi
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return 0
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}
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while ! enter_time_and_change; do
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echo "Could not set the date to $year-$month-$day $hour:$min:$sec"
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read -rp "Try again? [Y/n]: " try_again_confirm
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if [ "${try_again_confirm^^}" = N ]; then
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exit 1
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fi
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echo
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done
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hwclock -w
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echo "The system date has been sucessfully set to $year-$month-$day $hour:$min:$sec UTC"
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echo
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echo "Press Enter to return to the menu"
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echo
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read -r nothing
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