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authorJonas Smedegaard <dr@jones.dk>2013-02-09 19:54:08 +0100
committerJonas Smedegaard <dr@jones.dk>2013-03-09 05:46:00 +0100
commit45ad89b6cddbcb3c112f1c2cdfd4361bc7fdced3 (patch)
tree06d7e81a91f8a4cbb5e49dd9bb7f49ada9e9c6c1 /src/share/checkperms
parente02c127f8e2c5001cf90429a2ee3532d7a4e3c76 (diff)
Dual-quote arguments passed to su_monkeysphere_user() when possible.dualquote
It is a healthy coding practice to keep each argument separate when executing system calls, i.e. quote each variable separately instead of relying on whitespace to indicate argument separation. Quoting shell-inside-shell is tricky to do right, and gets trickier when the wrapper demands unusually complex quoting. su_monkeysphere_user() expands arguments using "$*" which (unlike "$@") collapses all arguments into a single string, and therefore require "risky" arguments (e.g. ones containing variables that may contain space or other unusual characters) to be dual-quoted for them to not wreak havoc at the inside shell. This patch improves arguments passed to su_monkeysphere_user() by first single-quoting and then double-quoting arguments containing variables. NB! Dynamic arguments are only double-quoted ( "$@" ) which looks safe but effectively is a noop (quoting is lost at wrapper!).
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