mount 返回非零退出代码 64

【问题标题】：mount returns non-zero exit code 64mount 返回非零退出代码 64
【发布时间】：2020-09-16 12:12:10
【问题描述】：

在生产系统（Centos 7）上运行“mount -a”时，我得到返回码 64

try:
    subprocess.check_call(["mount", "-a"])
except subprocess.CalledProcessError as e:
    raise Exception("Failed to run mount command. error:%s", str(e))

以下是日志：

raise Exception("Failed to run mount command. error:%s", str(e))
Exception: ('Failed to run mount command. error:%s', "Command '['mount', '-a']' returned non-zero exit status 64")

退出代码 64 是什么意思？

【问题讨论】：

检查man mount 的返回码。

标签： python centos subprocess centos7

【解决方案1】：

这意味着一些文件系统未能挂载，但其他文件系统成功。

来自mount(8) manual：

返回代码

   mount has the following return codes (the bits can be ORed):

   0      success

   1      incorrect invocation or permissions

   2      system error (out of memory, cannot fork, no more loop devices)

   4      internal mount bug

   8      user interrupt

   16     problems writing or locking /etc/mtab

   32     mount failure

   64     some mount succeeded

   The command mount -a returns 0 (all succeeded), 32 (all failed), or 64 (some failed,  some
   succeeded).

【讨论】：