oh-my-zsh/lib/compfix.zsh

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# Handle completions insecurities (i.e., completion-dependent directories with
# insecure ownership or permissions) by:
#
# * Human-readably notifying the user of these insecurities.
function handle_completion_insecurities() {
# List of the absolute paths of all unique insecure directories, split on
# newline from compaudit()'s output resembling:
#
# There are insecure directories:
# /usr/share/zsh/site-functions
# /usr/share/zsh/5.0.6/functions
# /usr/share/zsh
# /usr/share/zsh/5.0.6
#
# Since the ignorable first line is printed to stderr and thus not captured,
# stderr is squelched to prevent this output from leaking to the user.
local -aU insecure_dirs
insecure_dirs=( ${(f@):-"$(compaudit 2>/dev/null)"} )
# If no such directories exist, get us out of here.
(( ! ${#insecure_dirs} )) && return
# List ownership and permissions of all insecure directories.
print "[oh-my-zsh] Insecure completion-dependent directories detected:"
ls -ld "${(@)insecure_dirs}"
cat <<EOD
[oh-my-zsh] For safety, we will not load completions from these directories until
[oh-my-zsh] you fix their permissions and ownership and restart zsh.
[oh-my-zsh] See the above list for directories with group or other writability.
[oh-my-zsh] To fix your permissions you can do so by disabling
[oh-my-zsh] the write permission of "group" and "others" and making sure that the
[oh-my-zsh] owner of these directories is either root or your current user.
[oh-my-zsh] The following command may help:
[oh-my-zsh] compaudit | xargs chmod g-w,o-w
[oh-my-zsh] If the above didn't help or you want to skip the verification of
[oh-my-zsh] insecure directories you can set the variable ZSH_DISABLE_COMPFIX to
[oh-my-zsh] "true" before oh-my-zsh is sourced in your zshrc file.
EOD
}