On Thu, Dec 20, 2001 at 10:00:28PM -0600, David W. Tamkin wrote:
When Don wrote code that included the "$" modifier and noted,
| > Just don't forget the '$' at the beginning of each condition to get the
| > variable expanded.
cat(_at_)zip(_dot_)com(_dot_)au asked,
| Doesn't this mean that a shell process will be spawned for each entry in
| the rule to do the expansion?
I'm very sure that in expanding conditions that have the "$" modifier,
1. procmail does the variable substitution on its own;
Hmmm. This is the part of the manpage that worries me:
$ Evaluate the remainder of this condition according to
sh(1) substitution rules inside double quotes, skip
leading whitespace, then reparse it.
2. procmail does any backticked command substitution where the command
string has no characters from $SHELLMETAS; and
This seems to be for pipes:
| Starts the specified program, possibly in $SHELL if
any of the characters $SHELLMETAS are spotted. You
...
SHELLMETAS If any of the characters in SHELLMETAS appears
in the line specifying a filter or program,
the line will be fed to $SHELL instead of
being executed directly.
3. procmail spawns a shell only for command substitution where the command
includes characters from $SHELLMETAS.
Yeah. This seems to be what I see above.
So if my beliefs about it are right, the answer is no, it doesn't.
Still pondering. :)
--
CaT - A high level of technology does not a civilisation make.
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