為什么我的set命令出現的全是各種函數代碼，和env的那種不一樣？

_yum_helper ()?

{?

? ? local IFS='

';

? ? COMPREPLY+=($(

? ? ? ? /usr/share/yum-cli/completion-helper.py -d 0 -C "$@" 2>/dev/null ))

}

_yum_list ()?

{?

? ? [[ $2 == */* || $2 == [.~-]* ]] && return;

? ? _yum_helper list "$@"

}

_yum_plugins ()?

{?

? ? local val;

? ? [[ $1 -eq 1 ]] && val='\(1\|yes\|true\|on\)' || val='\(0\|no\|false\|off\)';

? ? COMPREPLY+=($( compgen -W '$( command grep -il "^\s*enabled\s*=\s*$val" \

? ? ? ? /etc/yum/pluginconf.d/*.conf 2>/dev/null \

? ? ? ? | sed -ne "s|^.*/\([^/]\{1,\}\)\.conf$|\1|p" )' -- "$2" ))

}

_yum_transactions ()?

{?

? ? COMPREPLY+=($( compgen -W "$( $yum -d 0 -C history 2>/dev/null | ? ? ? ? sed -ne 's/^[[:space:]]*\([0-9]\{1,\}\).*/\1/p' )" -- "$cur" ))

}

dequote ()?

{?

? ? eval printf %s "$1" 2> /dev/null

}

quote ()?

{?

? ? local quoted=${1//\'/\'\\\'\'};

? ? printf "'%s'" "$quoted"

}

quote_readline ()?

{?

? ? local quoted;

? ? _quote_readline_by_ref "$1" ret;

? ? printf %s "$ret"

}