[Bash-completion-devel] bash autocomplete triggers an ldap request

[Dean Sniegowski]

I've noticed my bash autocomplete will frequently hang.

System info:
I'm running Ubuntu 14.04.1
Bash Autocomplete 2.1-4
Authentication using sssd configured for kerberos and ldap

Suspected Cause:
 in _quote_readline_by_ref() has a line  elif [[ $1 == ~* ]]; then
It appears this line causes sssd to make an ldap request for all the
accounts which take a couple of seconds.

I'm fairly certain this is the cause because if I delete that elif, the
delay goes away and there are no ldap requests.

Is this a bug or is it intended to retrieve all home directories?


complete function
# This function quotes the argument in a way so that readline dequoting
# results in the original argument.  This is necessary for at least
# `compgen' which requires its arguments quoted/escaped:
#
#     $ ls "a'b/"
#     c
#     $ compgen -f "a'b/"       # Wrong, doesn't return output
#     $ compgen -f "a\'b/"      # Good
#     a\'b/c
#
# See also:
# - http://lists.gnu.org/archive/html/bug-bash/2009-03/msg00155.html
# - http://www.mail-archive.com/bash-completion-devel@lists.alioth.\
#   debian.org/msg01944.html
# @param $1  Argument to quote
# @param $2  Name of variable to return result to
_quote_readline_by_ref()
{
    if [ -z "$1" ]; then
        # avoid quoting if empty
        printf -v $2 %s "$1"
    elif [[ $1 == \'* ]]; then
        # Leave out first character
        printf -v $2 %s "${1:1}"
    elif [[ $1 == ~* ]]; then
        # avoid escaping first ~
        printf -v $2 ~%q "${1:1}"
    else
        printf -v $2 %q "$1"
    fi

    # Replace double escaping ( \\ ) by single ( \ )
    # This happens always when argument is already escaped at cmdline,
    # and passed to this function as e.g.: file\ with\ spaces
    [[ ${!2} == *\\* ]] && printf -v $2 %s "${1//\\\\/\\}"

    # If result becomes quoted like this: $'string', re-evaluate in order to
    # drop the additional quoting.  See also: http://www.mail-archive.com/
    # bash-completion-devel at lists.alioth.debian.org/msg01942.html
    [[ ${!2} == \$* ]] && eval $2=${!2}
} # _quote_readline_by_ref()
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