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Top Forums Shell Programming and Scripting Set/Export Env Vars from with Shell Script With Input Variable Post 302405328 by brtaylor73 on Thursday 18th of March 2010 01:37:01 PM
Old 03-18-2010
Set/Export Env Vars from with Shell Script With Input Variable

I have a shell script I want to run that will set environment variables based on the value of an input variable submitted when the shell script is called. For example:

$ mgenv.sh prod

This would set environment variables for prod

$ mgenv.sh test

This would set environment variables for test

When I run the script using the syntax above, it works fine. However, my environment variables are not being set. Example of the syntax used in the shell script:

FIN_INTERFACE_DIR=\u06\interfaces\$1;export FIN_INTERFACE_DIR

Like I said, the script runs to completion, no errors reported - and then I check my environment variables and FIN_INTERFACE_DIR is not set.

If I take the input variable of the equation and hard code in my environment variables like so:

FIN_INTERFACE_DIR=\u06\interfaces\prod;export FIN_INTERFACE_DIR

Then run it with this command:

$ mgenv.sh

I get the same result - the script runs through clean without errors but no environment variables are set.

HOWEVER, my next test was to use the hardcoded variable but run the script with the following command:

$ . ./mgenv.sh

This worked great! Environment variable was set and exported. Finally - I use the new command and re-institute the use of the run-time variable $1 and run the following command:

$ . ./mgenv.sh prod

At this, I get the dreaded

1: parameter not set

So - how can I run this script with an input parameter and have it actually set environment variable? Any suggestions? Thanks.
 

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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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