From: Matthijs Kooijman <matthijs@stdin.nl>
Date: Wed, 17 Mar 2010 21:42:44 +0000 (+0100)
Subject: Clarify (and improve) the escaping used in getconf.
X-Git-Url: https://git.stderr.nl/gitweb?a=commitdiff_plain;h=2e919339435fb77e0b7cf20f2f6e0bee4005b1ee;p=matthijs%2Fupstream%2Fbackupninja.git

Clarify (and improve) the escaping used in getconf.

The code is effectively identical, but a bit clearer. The comment above
it should now make it clear what eval is seeing exactly.
---

diff --git a/lib/tools.in b/lib/tools.in
index 888dad1..a6dcf26 100644
--- a/lib/tools.in
+++ b/lib/tools.in
@@ -53,8 +53,9 @@ function getconf() {
    # replace * with %, so that it is not globbed.
    ret="${ret//\\*/__star__}"
 
-   # this is weird, but single quotes are needed to
-   # allow for returned values with spaces. $ret is still expanded
-   # because it is in an 'eval' statement.
-   eval $1='$ret'
+   # We use escape the $ in $ret to delay expansion of $ret, so when $1
+   # is foo, eval sees foo=$ret and properly does the assignment
+   # (without the backslash, the right part of the assignment would be
+   # whatever is in ret and be subject to all kinds of expansion.
+   eval $1=\$ret
 }