Forum: Cfengine Help
Subject: backslashes within execresult
Author: joke
Link to topic: https://cfengine.com/forum/read.php?3,18896,18896#msg-18896
Hi,
this time I'm not sure how backslashes are handled within the execresult
function. I tried to process some command output with sed but cfengine's
(3.1.0b2) escaping seems to be very odd.
A function call like this seems to be automatically escaped:
execresult("/bin/echo \*", "useshell");
The echoed result is "\*". Escaping the backslash with an other backslash
execresult("/bin/echo \\*", "useshell");
returns the same echoed result "\*";
As far as I understand cfengine escaping should be done via $(const.endl),
$(const.n), etc. constants and not via c-like escape sequences. Therefore
execresult("/bin/echo \*", "useshell");
should be passed down as
execve("/bin/sh", ["sh", "-c", "/bin/echo \\*"]
with should result in a shell line like
/bin/echo \*
with ends in calling "/bin/echo" with "*" as first argument. But it should not
be automatically escaped and be passed down as "\\" like cfengine does.
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