09-28-2017
Quote:
Originally Posted by
Riker1204
But one thing still bothers me, I thought I understood the order of evaluation and it still doesn't make sense about the eval part.
It's not about order of evaluation, it's about your filenames being mangled from passing them through a pointless pipe chain then cramming them into read -d "\0". The -d "\0" is especially pointless in this context, I suspect it was grabbed from some other script without understanding it.
I'm no longer certain of my original guess about
how exactly they were mangled, but they must have been, in a way which eval would swallow. Nulls injected between records from -d "\0" maybe.
My question: How did it occur to you to use eval?
This User Gave Thanks to Corona688 For This Post:
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LEARN ABOUT OPENSOLARIS
eval
eval(1T) Tcl Built-In Commands eval(1T)
__________________________________________________________________________________________________________________________________________________
NAME
eval - Evaluate a Tcl script
SYNOPSIS
eval arg ?arg ...?
_________________________________________________________________
DESCRIPTION
Eval takes one or more arguments, which together comprise a Tcl script containing one or more commands. Eval concatenates all its argu-
ments in the same fashion as the concat command, passes the concatenated string to the Tcl interpreter recursively, and returns the result
of that evaluation (or any error generated by it). Note that the list command quotes sequences of words in such a way that they are not
further expanded by the eval command.
EXAMPLE
This procedure acts in a way that is analogous to the lappend command, except it inserts the argument values at the start of the list in
the variable:
proc lprepend {varName args} {
upvar 1 $varName var
# Ensure that the variable exists and contains a list
lappend var
# Now we insert all the arguments in one go
set var [eval [list linsert $var 0] $args]
}
KEYWORDS
concatenate, evaluate, script
SEE ALSO
catch(1T), concat(1T), error(1T), list(1T), subst(1T), tclvars(1T)
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Availability | SUNWTcl |
+--------------------+-----------------+
|Interface Stability | Uncommitted |
+--------------------+-----------------+
NOTES
Source for Tcl is available on http://opensolaris.org.
Tcl eval(1T)