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Old 07-29-2003, 08:45 AM   #1
Rex_chaos
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bash shell scirpt help


Hi all,
I have written so many shell scripts with bash. Most of them contain some identical functionality like reading password, check if input is numeric, etc. and some common constants (EXIT_CODE and ERROR_CODE). I wonder if it's possible to have a common script for organizing all this functions together. e.g.

#!/bin/bash

# Here is a common script for useful utilities and codes

EXIT_CODE=0
FILE_NOT_FOUND=-1
...

readpassword()
{
...
}

If it's ok, please tell me how to invoke the functions defined in the common script. Thanks in advance.
 
Old 07-29-2003, 08:53 AM   #2
acid_kewpie
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if you look at a rc init script, e.g. /etc/init.d/cron you should see a line such as
Code:
. functions
which is effectively a #include in bash to the funcitons file in that directory, i.e. it will source that file, which (afaik) doesn't actually have to be an executable bash script, just a set of bash commands (i.e. no #!/bin/sh etc...)
 
Old 07-29-2003, 08:53 AM   #3
vladkrack
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Yes you can call the functions of another script with:

source script.sh
 
Old 07-29-2003, 09:52 AM   #4
Rex_chaos
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I don't understand. Suppose I define thousands of functions in a script(says script.sh). How can I just call one function in the script?
 
Old 07-29-2003, 10:03 AM   #5
vladkrack
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Lets consider that one of your functions inside script.sh it's called xfunc and you want to use in other script called script2.sh.

Edit script2.sh and add a line:
source script.sh

then in this script you will be able to call your function by its name:
xfunc foobar
 
Old 07-29-2003, 10:08 AM   #6
Rex_chaos
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great. thanks a lot
 
Old 07-29-2003, 11:17 AM   #7
Rex_chaos
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I wonder why the function can only return a numeric value. How can I return a string? Thanks
 
  


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