我有一个脚本，其中包含一些主体用来执行的功能。现在，我想在 3 台远程 unix 机器上运行这个脚本。哪种方法最简洁？最重要的是，我不会为远程连接编写第二个脚本。一切都应该在这个脚本中。
我已经用 ssh 尝试了 heredoc，由于功能强大，它无法正常工作！
代码 -
#!/bin/bash
# Year Month Day Related functions
# FUNCTIONS
# Find no. of days in a year
yeardays()
{
# argument check
if [ X$1 = X ]
then
read year
else
year=$1
fi
# Check for leap years
if [ `expr $year % 400` = 0 ]
then
echo 366
exit
fi
if [ `expr $year % 100` = 0 ]
then
echo 365
exit
fi
if [ `expr $year % 4` = 0 ]
then
echo 366
exit
fi
echo 365
}
# Find no. of days in a Month
monthdays()
{
# argument check
if [ X$1 = X ]
then
read ymd # year in yyyymmdd format
elif [ X$2 = X ]
then
ymd=$1
else
ymd=`expr \( $1 \* 10000 \) + \( $2 \* 100 \) + 1`
fi
year=`expr $ymd / 10000` ;
month=`expr \( $ymd % 10000 \) / 100` ;
case $month in
1|3|5|7|8|10|12) echo 31 ; exit ;;
4|6|9|11) echo 30 ; exit ;;
*) ;;
esac
# except for month 2, which depends on whether the year is a leap year
# Use yeardays to get the number of days in the year and return a value
# accordingly.
daysInYear=`yeardays $year`
case $daysInYear in
365) echo 28 ; exit ;;
366) echo 29 ; exit ;;
esac
}
ymd2yd() # convert from YYYYMMDD(gregorian) to YYYYDDD(julian)
{
# argument check
if [ X$1 = X ]
then
read date
else
date=$1
fi
year=`expr $date / 10000`
month=`expr \( $date % 10000 \) / 100`
days=`expr $date % 100`
count=1
while [ `expr $count \< $month` = 1 ]
do
daysInMonth=`monthdays $year $count`
days=`expr $days + $daysInMonth`
count=`expr $count + 1`
done
julian=`expr \( $year \* 1000 \) + $days`
echo $julian
}
yd2ymd() # convert from YYYYDDD(julian) to YYYYMMDD(gregorian)
{
# argument check
if [ X$1 = X ]
then
read date
else
date=$1
fi
year=`expr $date / 1000`
days=`expr $date % 1000`
month=1
while [ `expr $days \> 0` = 1 ]
do
daysInMonth=`monthdays $year $month`
days=`expr $days - $daysInMonth`
month=`expr $month + 1`
done
days=`expr $days \+ $daysInMonth`
month=`expr $month \- 1`
gregorian=`expr \( $year \* 10000 \) + \( $month \* 100 \) + $days`
echo $gregorian
}
ydadd() # Add/Subtract days to YYYYDDD format
{
# argument check
if [ X$2 = X ]
then
difference=$1
read yd # Read the YYYYDDD format date
else
yd=$1
difference=$2
fi
days=`expr $yd % 1000`
year=`expr $yd / 1000`
days=`expr $days + $difference`
daysInYear=`yeardays $year`
while [ `expr $days \> $daysInYear` = 1 ]
do
days=`expr $days - $daysInYear`
year=`expr $year + 1`
daysInYear=`yeardays $year`
done
while [ `expr $days \< 1` = 1 ]
do
year=`expr $year - 1`
daysInYear=`yeardays $year`
days=`expr $days + $daysInYear`
done
yd=`expr \( $year \* 1000 \) + $days` # Final date in YYYYDDD format
echo $yd
}
ymdadd() # Add/Subtract days to YYYYMMDD format
{
if [ X$2 = X ]
then
difference=$1
read ymd # Read YYYYMMDD format date
else
ymd=$1
difference=$2
fi
echo $ymd | ymd2yd | ydadd $difference | yd2ymd # Convert YYYYMMDD to YYYYDDD, perform date arithmetic, then revert to YYYYMMDD format
}
daysLeft() # Calculate days between two dates in YYYYMMDD format
{
# argument check
if [ X$1 = X ]
then
read ymd1 # First date in YYYYMMDD format
read ymd2 # Second date in YYYYMMDD format
elif [ X$2 = X ]
then
ymd1=$1
read ymd2
else
ymd1=$1
ymd2=$2
fi
year1=`expr $ymd1 / 10000`
month1=`expr \( $ymd1 % 10000 \) / 100`
day1=`expr $ymd1 % 100`
year2=`expr $ymd2 / 10000`
month2=`expr \( $ymd2 % 10000 \) / 100`
day2=`expr $ymd2 % 100`
daysm1=`monthdays $year1 $month1`
days=`expr $daysm1 - $day1`
month1=`expr $month1 + 1`
while [ `expr $month1 \<= 12` = 1 ]
do
daysm1=`monthdays $year1 $month1`
days=`expr $days + $daysm1`
month1=`expr $month1 + 1`
done
x=1
while [ `expr $x \< $month2` = 1 ]
do
daysm2=`monthdays $year2 $x`
days=`expr $days + $daysm2`
x=`expr $x + 1`
done
days=`expr $days + $day2`
echo $days
}
# MAIN BODY
# Connect to different Servers
declare -a SERVER=('server1' 'server2' 'server3')
remoteUser=abc
serverNumbers=${#SERVER[@]}
count=0
while [ `expr $count \< $serverNumbers` = 1 ]
do
# Connect to server
ssh -T -q $remoteUser@${SERVER[count]} <<-"END_TEXT"
VALUE=`cat /home/cognos/cognos/c8/configuration/cogstartup.xml | grep -i xsd:long | head -1 | cut -d">" -f2 | sed 's/[:/<|crn:value]*//g'`
VALUE_BACKUP=$VALUE
let 'VALUE -= 30'
let 'VALUE *= 86400'
RESULT1=`perl -e '@stats = stat("/home/cognos/cognos/c8/configuration/signkeypair"); print ((time - $stats[9]) < "$VALUE");'`
RESULT2=`perl -e '@stats = stat("/home/cognos/cognos/c8/configuration/encryptkeypair"); print ((time - $stats[9]) < "$VALUE");'`
RESULT3=`perl -e '@stats = stat("/home/cognos/cognos/c8/configuration/caSerial"); print ((time - $stats[9]) < "$VALUE");'`
while [ "$RESULT1" -o "$RESULT2" -o "$RESULT3" ]
do
echo "Sending mail."
# Calculate days left
CURRENT_DATE=`date +"%Y-%m-%d" | sed 's/-//g'`
CREATION_DATE=`ls -logE /home/cognos/cognos/c8/configuration/ | grep -i signkeypair | awk '{print $4}' | sed 's/-//g'`
EXPIRY_DATE=`ymdadd $CREATION_DATE $VALUE_BACKUP`
DAYS_LEFT=`daysLeft $CURRENT_DATE $EXPIRY_DATE`
# Identify environment from hostname - DEV/UAT/PRD
LOCALHOST=`hostname`
ENVIRONMENT_TYPE=`echo $LOCALHOST | perl -ne '~m/.*([a-zA-Z]{3})[0-9]*$/; print $1;'|tr '[a-z]' '[A-Z]'`
# Identify process - FormPF/GoReporting
if (echo $LOCALHOST | grep -i cfp >/dev/null) then
PROCESS="FormPF"
else
PROCESS="GoReporting"
fi
# Add details to mail body
echo "The key was created on `ls -log /home/cognos/cognos/c8/configuration/ | grep -i signkeypair | awk '{print $4,$5,$6}'`, and was set to expire after $VALUE_BACKUP days." > mail.txt
echo "Key expires in $DAYS_LEFT days !!" >> mail.txt
echo " " >> mail.txt
echo "The server is-" >> mail.txt
hostname >> mail.txt
echo " " >> mail.txt
echo "Status of folders/files-" >> mail.txt
echo " " >> mail.txt
ls -log /home/cognos/cognos/c8/configuration/ | grep -i signkeypair | awk '{print $4,$5,$6,$7}' >> mail.txt
ls -log /home/cognos/cognos/c8/configuration/ | grep -i encryptkeypair | awk '{print $4,$5,$6,$7}' >> mail.txt
ls -log /home/cognos/cognos/c8/configuration/ | grep -i caSerial | awk '{print $4,$5,$6,$7}' >> mail.txt
echo " " >> mail.txt
echo "To reactive key, please restart the server at weekend with below options:" >> mail.txt
echo " " >> mail.txt
echo "/home/cognos/etc/restartAllServers.sh -cdsk" >> mail.txt
# Send warning mail !!
SUBJECT="!! ($ENVIRONMENT_TYPE) $PROCESS ($LOCALHOST) Cognos CSK(Common Symmetric Key) Expiry !!"
EMAIL="xyz@abc.com"
cat mail.txt | mailx -s "$SUBJECT" "$EMAIL"
rm mail.txt
break
done
logout
END_TEXT
count=`expr $count + 1`
done
exit 0