Shell Programming and Scripting

#!/bin/bash

logfile = "${HOME}/log/test.log"

./1.sh

echo " script over "

logfile="${HOME}/log/test.log"

#!/bin/bash



./bin/a.sh &

pid=$!

wait $pid

sft=$?

echo "a.sh job status : " $sft 1>>close.log 2>&1 

if [ $sft -eq 0 ]
then
	echo "a.sh is success at `date` " 1>>close.log 2>&1
else
	echo "a.sh failed at `date` " 1>>close.log 2>&1
	exit 1
fi



./bin/b.sh &

pid=$!

wait $pid

pt=$?

echo "b.sh job status : " $pt 1>>close.log 2>&1 

if [ $pt -eq 0 ]
then
	echo "b.sh is success at `date` " 1>>close.log 2>&1
else
	echo "b.sh failed at `date` " 1>>close.log 2>&1
	exit 1
fi

./bin/c.sh &

pid=$!

wait $pid

pit=$?

echo "c.sh job status : " $pit 1>>close.log 2>&1 

if [ $pit -eq 0 ]
then
	echo "c.sh is success at `date` " 1>>close.log 2>&1
else
	echo "c.sh failed at `date` " 1>>close.log 2>&1
	exit 1
fi

#!/bin/bash
# NOTE: This script runs a.sh and b.sh at the same tiem and reports the exit
# status of both before terminating (if either one fails) or moving to to c.sh
# (if both succeed).
# Start a and b...
./bin/a.sh &
pida=$!         # save pid of a.sh
./bin/b.sh &
pidb=$!         # save pid of b.sh

# Reap a...
# NOTE: The following wait will not collect the exit status of b.sh even if
# it finishes first.
wait $pida
esa=$?          # save exit status of a.sh

# NOTE: Following line creates close.log rather than appending to it.  So,
# we get a clean log for each invocation of this script.
# NOTE: There is no need to redirect stderr from these echo commands; the
# only reason for echo to fail would be if there is an error writing to the
# log file (and redirecting that error message to a file that can't be written
# to means that we would get no notification of the error).
echo "a.sh job status : $esa" >close.log
if [ $esa -eq 0 ]
then
        echo "a.sh is success at $(date)" >>close.log
else
        echo "a.sh failed at $(date)" >>close.log
fi

# Reap b...
wait $pidb
esb=$?          # save exit status of b.sh
echo "b.sh job status : $esb" >>close.log
if [ $esb -eq 0 ]
then
        echo "b.sh is success at $(date)" >>close.log
else
        echo "b.sh failed at $(date)" >>close.log
fi

# Exit if a or b failed...
if [ $esa -ne 0 ] || [ $esb -ne 0 ]
then    exit 1
fi

# Run c...
# NOTE: We don't have anything else to do while c.sh is running, so there is
# no need to start it asynchronously.
./bin/c.sh
esc=$?          # save exit status of c.sh
echo "c.sh job status : $esc" >>close.log

if [ $esc -eq 0 ]
then
        echo "c.sh is success at $(date)" >>close.log
else
        echo "c.sh failed at $(date)" >>close.log
        exit 2
fi