mjhjmtu

When using sudo iotop (latest version 0.6-2.el7) in a terminal in my newly installed CentOS 7.5, I get the following error message:

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

Any idea how to fix this problem?

Apparently, recent kernel versions introduced a blank line in /proc/(pid)/status that iotop does not expect:

CapBnd: 0000001fffffffff
CapAmb: 0000000000000000
Seccomp: 0

SpeculationStoreBypass: vulnerable

As a zeroth approximation of a fix, edit (as root) /usr/lib/python2.7/site-packages/iotop/data.py ca 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

where the if not line.strip(): continue is new. Beware that python does not have explicit braces, so the indentation of this line should match that of the line below it.

(Also see https://bugs.launchpad.net/pkg-website/+bug/1773383 for other fixes for this bug.)