04-20-2011
Bash parameter expansion from a config file
Hi -
I am trying to do a simple config file with known variable names in it, e.g.:
contents of config file a.conf:
-a
-b $work
-c $host
simplified contents of bash script file:
work='trunk'
host='alaska'
opts=$(tr '\n' ' ' < a.conf)
opts="$opts $*"
mycommand $opts arg1 arg2
The goal is to get the script to execute:
mycommand -a -b trunk -c alaska arg1 arg2
But no matter what I try, it always comes out:
mycommand -a -b $work -c $host arg1 arg2
I have tried various quoting methods and evals, but no go.
Can anyone suggest the proper syntax for this?
Note: this is a highly simplified example so I would rather not have to do some kind of sed/awk substitution on the config file contents.
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LEARN ABOUT DEBIAN
sb2-config
sb2-config(1) sb2-config man page sb2-config(1)
NAME
sb2-config - scratchbox2 configuration tool
SYNOPSIS
sb2-config [OPTION]... [COMMAND [PARAMS]]
DESCRIPTION
sb2-config is used to set and display configuration of existing targets.
OPTIONS
-d default_target
This option sets the default sb2 target. The name of the target will be written to your $HOME/.scratchbox2/config file.
-l lists all available targets in your system. The names listed can be used as a parameter to the -d option.
-h Display short help.
-v Show version of this tool.
-t target
select target to be used with commands (below)
COMMANDS
showtarget
show default target.
showlog
show configuration log
showenv
show target-specific environment variables
setenv VARIABLE VALUE
set target-specific environment variable. The value becomes effective when sb2 is executed.
clearenv VARIABLE
set clearing for target-specific environment variable
unsetenv VARIABLE
remove target-specific environment variable
EXAMPLES
$ sb2-config -d diablo41_armel
This command sets your default target to be diablo41_armel.
$ sb2-config -l
This example lists all installed targets in your host. The names listed can be used as a parameter to the -d option.
SEE ALSO
sb2(1), sb2-init(1), sb2-show(1)
AUTHOR
Lauri Leukkunen
2.2 17 December 2010 sb2-config(1)