* Francisco Cuesta <[email protected]> [16.05.2013 18:32]:
> Thanks for replying Bastian,
>
> Do you know the meaning of the ${fixed:+"fixed_freq=1"} ?? I mean,
> this fixes the vaule of the frequency but for what value?
i can only see:
line 335:
[ "$channel" = "auto" -o "$channel" = "0" ] || {
fixed=1
}
line 528:
${fixed:+fixed-freq}
which means: if channel is auto or 0, than
the freq is NOT fixed, so dont insert the statement.
the syntax:
${variable:+bla}
means: has variable a value, than output "bla", which is the same like
[ -n "$variable" ] && echo "bla"
(but often used inline)
for further explenation read here:
http://tldp.org/LDP/abs/html/parameter-substitution.html
bye, bastian
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