CentOS 上的 iotop 命令出错

Question

在我新安装的 CentOS 7.5 的终端中使用sudo iotop(latest version 0.6-2.el7) 时，我收到以下错误消息：

Traceback (most recent call last):
  File "/sbin/iotop", line 17, in <module>
    main()
  File "/usr/lib/python2.7/site-packages/iotop/ui.py", line 620, in main
    main_loop()
  File "/usr/lib/python2.7/site-packages/iotop/ui.py", line 610, in <lambda>
    main_loop = lambda: run_iotop(options)
  File "/usr/lib/python2.7/site-packages/iotop/ui.py", line 508, in run_iotop
    return curses.wrapper(run_iotop_window, options)
  File "/usr/lib64/python2.7/curses/wrapper.py", line 43, in wrapper
    return func(stdscr, *args, **kwds)
  File "/usr/lib/python2.7/site-packages/iotop/ui.py", line 501, in run_iotop_window
    ui.run()
  File "/usr/lib/python2.7/site-packages/iotop/ui.py", line 155, in run
    self.process_list.duration)
  File "/usr/lib/python2.7/site-packages/iotop/ui.py", line 434, in refresh_display
    lines = self.get_data()
  File "/usr/lib/python2.7/site-packages/iotop/ui.py", line 415, in get_data
    return list(map(format, processes))
  File "/usr/lib/python2.7/site-packages/iotop/ui.py", line 388, in format
    cmdline = p.get_cmdline()
  File "/usr/lib/python2.7/site-packages/iotop/data.py", line 292, in get_cmdline
    proc_status = parse_proc_pid_status(self.pid)
  File "/usr/lib/python2.7/site-packages/iotop/data.py", line 196, in parse_proc_pid_status
    key, value = line.split(':\t', 1)
ValueError: need more than 1 value to unpack

知道如何解决这个问题吗？

Answer 1

显然，最近的内核版本在/proc/(pid)/statusiotop 中引入了一个空行：

CapBnd: 0000001fffffffff
CapAmb: 0000000000000000
Seccomp:    0

SpeculationStoreBypass: vulnerable

作为修复的第零近似值，编辑（以 root 身份）/usr/lib/python2.7/site-packages/iotop/data.pycal l.195：

def parse_proc_pid_status(pid):
    result_dict = {}
    try:
        for line in open('/proc/%d/status' % pid):
            if not line.strip(): continue
            key, value = line.split(':\t', 1)
            result_dict[key] = value.strip()
    except IOError:
        pass  # No such process

    return result_dict

哪里if not line.strip(): continue是新的。请注意，python 没有显式大括号，因此该行的缩进应与其下方行的缩进相匹配。

（另请参阅https://bugs.launchpad.net/pkg-website/+bug/1773383以了解此错误的其他修复程序。）