Ubuntu 中的 lsb-base-logging 脚本和“INITOUTPUT”变量

Question

我在 ubuntu 机器上安装 Mysql 服务器时遇到了一些麻烦。经过一番搜索，我发现 Mysql 的初始化脚本 (/etc/init.d/mysql) 尝试调用“/etc/lsb-base-logging.sh”shell 脚本，该脚本中有 4 行检查变量“INITOUTPUT”的值，但该变量未定义。

我只是注释了这 4 行，一切正常。我检查了使用 Fedora 10 的笔记本电脑，发现根本没有“lsb-base-logging.sh”脚本。有人知道这个脚本在系统中执行什么具体任务吗？为什么它使用未定义的变量？该变量实际上有什么用处？

更新 我在这里附加脚本。文件：/etc/lsb-base-logging.sh

# Default init script logging functions suitable for Ubuntu.
# See /lib/lsb/init-functions for usage help.
# edited by Farzad Ghanei lines 84, 114, 136, 156 are commented to fix mysql server start

. /etc/default/rcS

log_use_usplash () {
    if [ "${loop:-n}" = y ]; then
        return 1
    fi
    type usplash_write >/dev/null 2>&1
}

log_to_console () {
    [ "${loop:-n}" != y ] || return 0
    [ "${QUIET:-no}" != yes ] || return 0

    # Only output to the console when we're given /dev/null
    stdin=`readlink /proc/self/fd/0`
    [ "${stdin#/dev/null}" != "$stdin" ] || return 0

    func=$1
    shift

    loop=y $func "$@" </dev/console >/dev/console 2>&1 || true
}

log_success_msg () {
    if log_use_usplash; then
        usplash_write "STATUS $*" || true
    fi

    log_to_console log_success_msg "$@"

    echo " * $@"
}

log_failure_msg () {
    if log_use_usplash; then
        usplash_write "STATUS $*" || true
    fi

    log_to_console log_failure_msg "$@"

    if log_use_fancy_output; then
        RED=`$TPUT setaf 1`
        NORMAL=`$TPUT op`
        echo " $RED*$NORMAL $@"
    else
        echo " * $@"
    fi
}

log_warning_msg () {
    if log_use_usplash; then
        usplash_write "STATUS $*" || true
    fi

    log_to_console log_warning_msg "$@"

    if log_use_fancy_output; then
        YELLOW=`$TPUT setaf 3`
        NORMAL=`$TPUT op`
        echo " $YELLOW*$NORMAL $@"
    else
        echo " * $@"
    fi
}

log_begin_msg () {
    log_daemon_msg "$1"
}

log_daemon_msg () {
    if [ -z "$1" ]; then
        return 1
    fi

    if log_use_usplash; then
        usplash_write "TEXT $*" || true
    fi

    log_to_console log_daemon_msg "$@"

#    if [ "$INITOUTPUT" = "yes" ]; then
        if log_use_fancy_output && $TPUT xenl >/dev/null 2>&1; then
            COLS=`$TPUT cols`
            if [ "$COLS" ] && [ "$COLS" -gt 6 ]; then
                COL=`$EXPR $COLS - 7`
            else
            COLS=80
                COL=73
            fi
            # We leave the cursor `hanging' about-to-wrap (see terminfo(5)
            # xenl, which is approximately right). That way if the script
            # prints anything then we will be on the next line and not
            # overwrite part of the message.

            # Previous versions of this code attempted to colour-code the
            # asterisk but this can't be done reliably because in practice
            # init scripts sometimes print messages even when they succeed
            # and we won't be able to reliably know where the colourful
            # asterisk ought to go.

            printf " * $*       "
            # Enough trailing spaces for ` [fail]' to fit in; if the message
            # is too long it wraps here rather than later, which is what we
            # want.
            $TPUT hpa `$EXPR $COLS - 1`
            printf ' '
        else
            echo " * $@"
            COL=
        fi
#    fi
}

log_progress_msg () {
    :
}

log_end_msg () {
    if [ -z "$1" ]; then
        return 1
    fi

    if log_use_usplash; then
        if [ "$1" -eq 0 ]; then
            usplash_write "SUCCESS OK" || true
        else
            usplash_write "FAILURE failed" || true
        fi
    fi

    log_to_console log_end_msg "$@"

#    if [ "$INITOUTPUT" = "yes" ]; then
        if [ "$COL" ] && [ -x "$TPUT" ]; then
            printf "\r"
            $TPUT hpa $COL
            if [ "$1" -eq 0 ]; then
                echo "[ OK ]"
            else
                printf '['
                $TPUT setaf 1 # red
                printf fail
                $TPUT op # normal
                echo ']'
            fi
        else
            if [ "$1" -eq 0 ]; then
                echo "   ...done."
            else
                echo "   ...fail!"
            fi
        fi
#    fi

    return $1
}

log_action_msg () {
    if log_use_usplash; then
        usplash_write "TEXT $*" || true
    fi

    log_to_console log_action_msg "$@"

    echo " * $@"
}

log_action_begin_msg () {
    log_daemon_msg "$@..."
}

log_action_cont_msg () {
    log_daemon_msg "$@..."
}

log_action_end_msg () {
    # In the future this may do something with $2 as well.
    log_end_msg "$1" || true
}

Answer 1

/etc/lsb-base-logging.sh除了与“INITOUTPUT”变量相关的行和. /etc/default/rcS靠近开头的行之外，我的与您的完全相同。

似乎您不应该注释掉这些行，而应该在文件INITOUTPUT=yes中添加/etc/default/rcS。该变量用于控制在系统启动期间是否执行某些日志输出。

至于脚本的目的，这里有以下内容/usr/share/doc/lsb-base/README.Debian.gz：

Debian lsb-base 软件包提供了一系列日志记录函数来
允许简化对 init 脚本操作的记录。这些函数是
特定于 Debian 和（在某些情况下）其他派生发行版。

你的 Ubuntu 是什么版本？