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Top Forums Shell Programming and Scripting Terminate initially if error found... Post 302488058 by methyl on Friday 14th of January 2011 05:49:40 PM
Old 01-14-2011
Please show us how you run these scripts? Are you typing the commands at a keyboard? Are you using unix "cron"? Is there a wrapper script - if so, what does the script contain?

Code:
Script1.sh 
Script2.sh 
Script3.sh 
Script4.sh 
Script5.sh

Ps. As DGPickett implies you can indeed cause a sub-Script to exit with a non-zero exit status (e.g. "exit 2")which you can check in a wrapper script. Test the value of the variable $? on the line immediately following the invocation of the sub-Script in a numeric comparison. This is good scripting technique and not at all unusual. Confine exit codes to simple and low numbers because no Shell will allow a non-numeric exit code and many Shells cannot deal with large numbers in exit codes.

Difficult to suggest suitable scripting without knowing the possible values of $rc and knowing whether the variable contains a number or a string.


Ps. It always helps to know what Operating System and version you have and what Shell you prefer.

Last edited by methyl; 01-14-2011 at 06:52 PM.. Reason: typos and Ps.
 

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exit(1) 							   User Commands							   exit(1)

NAME
exit, return, goto - shell built-in functions to enable the execution of the shell to advance beyond its sequence of steps SYNOPSIS
sh exit [n] return [n] csh exit [ ( expr )] goto label ksh *exit [n] *return [n] DESCRIPTION
sh exit will cause the calling shell or shell script to exit with the exit status specified by n. If n is omitted the exit status is that of the last command executed (an EOF will also cause the shell to exit.) return causes a function to exit with the return value specified by n. If n is omitted, the return status is that of the last command exe- cuted. csh exit will cause the calling shell or shell script to exit, either with the value of the status variable or with the value specified by the expression expr. The goto built-in uses a specified label as a search string amongst commands. The shell rewinds its input as much as possible and searches for a line of the form label: possibly preceded by space or tab characters. Execution continues after the indicated line. It is an error to jump to a label that occurs between a while or for built-in command and its corresponding end. ksh exit will cause the calling shell or shell script to exit with the exit status specified by n. The value will be the least significant 8 bits of the specified status. If n is omitted then the exit status is that of the last command executed. When exit occurs when executing a trap, the last command refers to the command that executed before the trap was invoked. An end-of-file will also cause the shell to exit except for a shell which has the ignoreeof option (See set below) turned on. return causes a shell function or '.' script to return to the invoking script with the return status specified by n. The value will be the least significant 8 bits of the specified status. If n is omitted then the return status is that of the last command executed. If return is invoked while not in a function or a '.' script, then it is the same as an exit. On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways: 1. Variable assignment lists preceding the command remain in effect when the command completes. 2. I/O redirections are processed after variable assignments. 3. Errors cause a script that contains them to abort. 4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari- able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
break(1), csh(1), ksh(1), sh(1), attributes(5) SunOS 5.10 15 Apr 1994 exit(1)
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