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Pablo A's questions

Martin Hope
Pablo A
Asked: 2024-07-15 22:41:22 +0800 CST
  • 6

我遇到了NUL character(s) present错误exim，类似于这篇文章，但由于该帖子太旧，我按照查尔斯戴维斯的建议创建了一个新问题。

$ tail -f /var/log/exim4/mainlog

2024-07-12 22:43:38 SMTP syntax error in "\026\003\001\002?\001?\001\374\003\003"\365\bZ\327b\277\373\261\032\246\217\275R\314b\201b\351\253k\304\001\3343/256/243/005/215U/301/207/311/227N/306e2+/216/226/307/361?0/023/002/023/003/023/001/300+/300/?/236/314/251/314/250/300" H=localhost [::1] NUL character(s) present (shown as '?')'>\\213fn\263N\303\244 \256'z\226o\305eE\231.:\234>3\256\243\005\215U\301\207\311\227N\306e2+\216\226\307\361?0\023\002\023\003\023\001\300+\300/?\236\314\251\314\250\300" H=localhost [::1] NUL character(s) present (shown as '?')
2024-07-12 22:43:38 SMTP syntax error in "\300\024?9\300        \300\023?3?\234?5?/\3000\300,?=?j?8?2?\377\001?\001\203???\016?\f??     localhost?\v?\004\003?\001\002?" H=localhost [::1] NUL character(s) present (shown as '?')
2024-07-12 22:43:38 SMTP syntax error in "?\f?" H=localhost [::1] NUL character(s) present (shown as '?')
2024-07-12 22:43:38 SMTP syntax error in "?\035?\027?\036?\031?\030?#???\005?\005\001?????\026???\027???\r?*?(\004\003\005\003\006\003\b\007\b\b\b      \b" H=localhost [::1] NUL character(s) present (shown as '?')
2024-07-12 22:43:38 SMTP call from localhost [::1] dropped: too many syntax or protocol errors (last command was "?\035?\027?\036?\031?\030?#???\005?\005\001?????\026???\027???\r?*?(\004\003\005\003\006\003\b\007\b\b\b      \b", NULL)

Exim: 4.94.2-7+deb11u3.  version 4.94.2 #2 built 09-Jul-2024 09:01:33
Distro: Debian GNU/Linux 11 (bullseye)
Kernel: 5.15.83-1-pve

在终端上这工作正常

echo 'hi!' | mail -s "Sent from $(hostname) at $(date +"%F %T")" [email protected]

从安装在主机（Koha）上的 Web 应用程序发送电子邮件时出现问题。

我该如何调试该问题以查明网络应用程序是否发送了无效字符串？

exim
Martin Hope
Pablo A
Asked: 2023-06-24 12:33:15 +0800 CST
  • 7

Ubuntu 20.04 最近更新后：

$ systemctl suspend
Call to Suspend failed: Access denied

几周前，这种方式工作得很好，没有任何 root 权限。

日记上：

dbus-daemon[1310]: [system] Rejected send message, 2 matched rules; type="method_call", sender=":1.991" (uid=1000 pid=683426 comm="systemctl suspend " label="unconfined") interface="org.freedesktop.login1.Manager" member="SuspendWithFlags" error name="(unset)" requested_reply="0" destination="org.freedesktop.login1" (uid=0 pid=1512 comm="/lib/systemd/systemd-logind " label="unconfined")

从

“拒绝发送消息”在 dbus 中相当于“权限被拒绝”。权限被拒绝的原因取决于发送者、目的地、接口和成员。

简单的搜索返回的主要是与休眠相关的问题。一种方法（1 , 2）可能是将 NOPASSWD 添加到 sudoers 文件（不相同），但似乎是polkit问题。

哪些软件包更新会导致此行为？除了编辑 sudoer 文件之外，还有其他（也许更优雅）的解决方案吗？

编辑：

$ grep -ri org.freedesktop.login1.suspend /usr/share/polkit-1/
/usr/share/polkit-1/actions/org.freedesktop.login1.policy:        <action id="org.freedesktop.login1.suspend">
/usr/share/polkit-1/actions/org.freedesktop.login1.policy:        <action id="org.freedesktop.login1.suspend-multiple-sessions">
/usr/share/polkit-1/actions/org.freedesktop.login1.policy:                <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.suspend</annotate>
/usr/share/polkit-1/actions/org.freedesktop.login1.policy:        <action id="org.freedesktop.login1.suspend-ignore-inhibit">
/usr/share/polkit-1/actions/org.freedesktop.login1.policy:                <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.suspend</annotate>

$ grep -i suspend /usr/share/dbus-1/system.d/org.freedesktop.login1.conf
                       send_member="Suspend"/>
                       send_member="SuspendThenHibernate"/>
                       send_member="CanSuspend"/>
                       send_member="CanSuspendThenHibernate"/>

由于某种原因，使用其他类似的普通用户systemctl suspend -i可以完美地工作。

也尝试过这个Result.YES。

使用busctl monitor：

‣ Type=error ...  Sender=org.freedesktop.DBus  Destination=:1.4594
  ErrorName=org.freedesktop.DBus.Error.AccessDenied  ErrorMessage="Rejected send message, 2 matched rules; type="method_call", sender=":1.4594" (uid=1000 pid=636652 comm="systemctl suspend -i " label="unconfined") interface="org.freedesktop.login1.Manager" member="SuspendWithFlags" error name="(unset)" requested_reply="0" destination="org.freedesktop.login1" (uid=0 pid=1512 comm="/lib/systemd/systemd-logind " label="unconfined")"
  MESSAGE "s" { STRING "Rejected send message, 2 matched rules; type="method_call", sender=":1.4594" (uid=1000 pid=636652 comm="systemctl suspend -i " label="unconfined") interface="org.freedesktop.login1.Manager" member="SuspendWithFlags" error name="(unset)" requested_reply="0" destination="org.freedesktop.login1" (uid=0 pid=1512 comm="/lib/systemd/systemd-logind " label="unconfined")"; };
systemd