Global environment variables in a shell script

Question

How to set a global environment variable in a bash script   If I do stuff like     bin bash FOO bar      or     bin bash export FOO bar      the vars seem to stay in the local context  whereas I d like to keep using them after the script has finished executing

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source myscript sh is also feasible   Description for linux command source   source is a Unix command that evaluates the file following the command   as a list of commands  executed in the current context

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Run your script with       myscript sh   This will run the script in the current shell environment   export governs which variables will be available to new processes  so if you say  FOO 1 export BAR 2   runScript sh   then  BAR will be available in the environment of runScript sh  but  FOO will not

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FOO bar export FOO

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When you run a shell script  it s done in a sub-shell so it cannot affect the parent shell s environment  You want to source the script by doing       setfoo sh   This executes it in the context of the current shell  not as a sub shell   From the bash man page             filename  arguments    source filename  arguments       Read and execute commands from filename in the current shell   environment and return the exit status of the last command executed   from filename       If filename does not contain a slash  file names in PATH are used to   find the directory containing filename       The file searched for in PATH need not be executable  When bash is not   in POSIX mode  the current directory is searched if no file is found   in PATH       If the sourcepath option to the shopt builtin command is turned off    the PATH is not searched       If any arguments are supplied  they become the positional parameters   when filename is  executed       Otherwise the positional parameters are unchanged  The return status   is the status of the last command exited within the script  0 if no   commands are executed   and false if filename is not found or cannot   be read

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bin bash export FOO bar   or     bin bash FOO bar export FOO   man export   The shell shall give the export attribute to the variables corresponding to the specified names  which shall cause them to be in the environment of subsequently executed commands  If the name of a variable is followed by   word  then the value of that variable shall be set to word

[shell] Global environment variables in a shell script

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