Restartability of scripts

Shell Programming and Scripting
1

I have main.ksh which will call various scripts inside and let us assume script1.ksh,script2.ksh,script3.ksh,script4.ksh.

Main.ksh

Some Unix commands1
script1.ksh
Some Unix commands2
script2.ksh
Some Unix commands3
script3.ksh
Some Unix commands4
script4.ksh

Let us say script2.ksh got failed due to some reason and when I rerun the Main.ksh script It should start from script2.ksh onwards.
Actually, I have so many commands and scripts in Main.ksh.I want this restartbility for entire script and How to do this?

2

Exactly this problem has been solved a week or two ago. Try searching for it.

EDIT: Let me search it for you: here.

3 Likes
3

I have one clarification on link:-Script execution in sequence manner

	if sh -x script1.sh > script1.log
	then	job=$((job + 1))
		date "+$job %c" > status
	else	echo "Failed due to some reason"
		exit 1
	fi

When job=$((job + 1)) and date "+$job %c" > status will be executed?
Case1:-Let us assume sh -x script1.sh is success and it will return 0 and it will execute else part
echo "Failed due to some reason"

Case2:-Let us assume sh -x script1.sh is failed and it will return non-zero and it will execute then part
job=$((job + 1)) and date "+$job %c" > status
It will increment the job value and also update the status.

Please correct me if i am wrong?

4

if (the keyword) is basically: goto then if the following command returns zero, otherwise go to the else -part. That means:

	if sh -x script1.sh > script1.log

means "if the return code of sh -x script1.sh is zero". Both your scenarios cannot happen therefore, it is the other way round: if the job returns 0 then the variable $job is incremented (and the log entry is written and if it fails the script exits with 1.

I hope this helps.

bakunin