外壳脚本输出，如何向上滚动

Question

我有一个在Debian上运行的shell脚本。它包含了许多功能和条件。有一个菜单，用户可以选择不同的选项，并显示不同的输出。用户总是可以回到主菜单，再次选择一些选项，然后显示另一个输出。当然，每次屏幕都会用"清除"来清除。

然而，当输出包含太多行时，我可以向上滚动一点，但它会停止，我将无法一直滚动到我需要看到的第一行。能够用鼠标滚轮向上滚动是我想要的行为之王。。。

问题似乎来自xterm窗口，因为它对普通终端来说很好。然而xterm很好，因为我可以设置高度和宽度，以及更改颜色。。。

有没有办法从脚本本身增加这个限制，因为我无权更改Debian环境中的任何内容。。。

我读到有些人实际上把整个脚本都调到了"less"，我试过了，问题是我不能再使用菜单了。。。

请在下面找到用于运行主脚本的第一个脚本：

xterm -fg ivory -bg darkblue -fn 8x13bold -geometry 76x110+1700+0 -T "QC CHECK" -e /tests/SCRIPTS/QC/qc.sh

下面是我的脚本的一个小样本，但是，它包含了更多：

#!/bin/sh
stty erase ^H
function water
{
clear
echo -e "Current Survey   : ${proj}"
echo -e "Current Sequence : ${seq}"
echo -e ""
echo -e "           [ Trace QC Water Column ]"
echo -e ""
if [ $mincable -eq $maxcable ]
then
echo -e "           Cable checked   : $maxcable"
else
echo -e "           Cables checked  : ${mincable}-${maxcable}"
fi
echo -e "           Max noise level : ${maxnoise}uB"
if [ ${skiptrace} -eq 0 ]
echo -e "           Traces skipped  : ${skiptrace}"
else
echo -e "           Traces skipped  : 1-${skiptrace}"
fi
echo -e ""
#############
water=`awk --field-separator=";" '($4>'$maxnoise') {print int(a=(($1-1)/'$nb_traces')+1) " " ($1-((int(a)-1)*'$nb_traces')) " " $4}' ${seq}_TraceAverages.txt | grep -v "USER_AVRMS_WC1" | grep -v "R32" | awk '{printf $1 " "  $2 " " ("%*.*fn"), 1, 2, $3}' | awk '($2>'$skiptrace')&&($1>='$mincable')&&($1<='$maxcable') {print $1 " - " $2 " - " $3}' | awk '{printf("%16s%6s%8s%6s%10sn"), $1, $2, $3, $4, $5}' | awk '(NR>1) && (old != $1) {printf("%65sn"), "'$sep_cable'"} {print; old=$1}'`
#############
count_water=`awk --field-separator=";" '($4>'$maxnoise') {print int(a=(($1-1)/'$nb_traces')+1) " " (b=($1-((int(a)-1)*'$nb_traces'))) " " $3}' ${seq}_TraceAverages.txt | grep -v "USER_AVRMS_WC1" | grep -v "R32" | awk '($2>'$skiptrace')&&($1>='$mincable')&&($1<='$maxcable') {print $3}' | wc -l`
#############
echo -e "           ------------------------------------------------------"
echo -e ""
echo -e "             Cable   -    Trace    -     RMS_WC"
echo -e ""
echo -e "           ------------------------------------------------------"
echo -e ""
if [ $count_water -ge 1 ]
then
echo -e "$water"
else
setterm -term linux -back red -fore white
echo -e "           Wow! No traces? Maybe decrease your values..."
setterm -term linux -default
fi
echo -e ""
setterm -term linux -back blue -fore white
echo -e "           RMS_WC > ${maxnoise}uB = $count_water"
setterm -term linux -default
echo -e ""
echo -e "           ------------------------------------------------------"
echo -e ""
}
    # check for latest project in /tests
proj_temp
    # if config file is missing go to config menu
if [ ! -e /tests/$proj/SCRIPTS/QC/config ]
then
config
fi
    # force choice=1 and config_ok=1 to return to main menu when loop has run once (no problem when more than one)
choice=1
config_ok=1
while :
do
    # do it all
if [ ${choice} -eq 1 2>/dev/null ]
then
choice=X
config_ok=1
    # read configuration file
readconfig
main
    # config menu and help
    if [ ${seq} = "c" ]
    then
config
    elif [ ${seq} = "h" ]
    then
help
    elif [ ${seq} = "q" ]
    then
clear
setterm -term linux -back magenta -fore white
echo ""
echo -e "t Try me next time :*"
sleep 0.65
exit
    fi
    # config_ok=1 when configuration is done, meaning user returns to main menu after exiting config menu
    if [ ${config_ok} -eq 1 ]
    then
cd $input_dir
    # check if file for requested sequence is valid
testline
    # this function updates the awk script for signal QC check
awkscript
doall
choice
    fi
    # let the user choose what QC is wanted
elif [ ${choice} -eq 2 2>/dev/null ]
then
choice=X
    # initialize values so that user can choose its own
init
menu
option
fi
    case ${menu} in
            1) deep
               choice ;;
            2) water
               choice ;;
            3) awkscript
               signal
               choice ;;
            4) readconfig
               awkscript
               doall
               choice ;;
    esac
if [ ${choice} = "q" 2>/dev/null ]
then
exit
fi
done

正如你所看到的，我有很多函数和变量，它们被称为一些"回声"，这使得当行太多时，我很难向上滚动，而且，用户还可以向上和向下滚动以查看所有内容，并进行选择和操作。

Answer 1

通过less或more管道输出。有前进、后退、搜索等选项（热键）。

Answer 2

我找不到滚动输出长度的方法，所以我所做的是一个循环，它以0.1的增量逐渐增加${maxnoise}的值（以输出行数为条件），因为这个变量实际上是决定输出大小的变量。这样做效果很好，所以我认为我的问题已经得到了回答。