[Bug 1813052] Re: who returns no results

[Anthony Godshall]

** Attachment added: "who.strace.txt"
   https://bugs.launchpad.net/bugs/1813052/+attachment/5537446/+files/who.strace.txt

** Attachment added: "dpkg_-l.txt"
   https://bugs.launchpad.net/bugs/1813052/+attachment/5537447/+files/dpkg_-l.txt

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Title:
  who returns no results

Status in systemd package in Ubuntu:
  Invalid

Bug description:
  Who returns no results on xenial.

  Here's an strace.  I don't see any obvious difference between it and
  an strace on a system that works (an unupdated xenial or a bionic
  system).

  # strace who
  execve("/usr/bin/who", ["who"], [/* 21 vars */]) = 0
  brk(NULL)                               = 0x9f9000
  access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
  access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
  open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
  fstat(3, {st_mode=S_IFREG|0644, st_size=117369, ...}) = 0
  mmap(NULL, 117369, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f2253eee000
  close(3)                                = 0
  access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
  open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
  read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832
  fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0
  mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2253eed000
  mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f225391c000
  mprotect(0x7f2253adc000, 2097152, PROT_NONE) = 0
  mmap(0x7f2253cdc000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c0000) = 0x7f2253cdc000
  mmap(0x7f2253ce2000, 14752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f2253ce2000
  close(3)                                = 0
  mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2253eec000
  mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2253eeb000
  arch_prctl(ARCH_SET_FS, 0x7f2253eec700) = 0
  mprotect(0x7f2253cdc000, 16384, PROT_READ) = 0
  mprotect(0x60a000, 4096, PROT_READ)     = 0
  mprotect(0x7f2253f0b000, 4096, PROT_READ) = 0
  munmap(0x7f2253eee000, 117369)          = 0
  brk(NULL)                               = 0x9f9000
  brk(0xa1a000)                           = 0xa1a000
  open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
  fstat(3, {st_mode=S_IFREG|0644, st_size=2981280, ...}) = 0
  mmap(NULL, 2981280, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f2253644000
  close(3)                                = 0
  access("/var/run/utmpx", F_OK)          = 0
  open("/var/run/utmpx", O_RDONLY|O_CLOEXEC) = 3
  lseek(3, 0, SEEK_SET)                   = 0
  alarm(0)                                = 0
  rt_sigaction(SIGALRM, {0x7f2253a5d380, [], SA_RESTORER, 0x7f22539514b0}, {SIG_DFL, [], 0}, 8) = 0
  alarm(10)                               = 0
  fcntl(3, F_SETLKW, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=0, l_len=0}) = 0
  read(3, 0x7f2253ce5120, 384)            = -1 EISDIR (Is a directory)
  fcntl(3, F_SETLKW, {l_type=F_UNLCK, l_whence=SEEK_SET, l_start=0, l_len=0}) = 0
  alarm(0)                                = 10
  rt_sigaction(SIGALRM, {SIG_DFL, [], SA_RESTORER, 0x7f22539514b0}, NULL, 8) = 0
  close(3)                                = 0
  close(1)                                = 0
  close(2)                                = 0
  exit_group(0)                           = ?
  +++ exited with 0 +++

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: coreutils 8.25-2ubuntu3~16.04
  ProcVersionSignature: Ubuntu 4.4.0-141.167-generic 4.4.162
  Uname: Linux 4.4.0-141-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  Date: Wed Jan 23 10:39:00 2019
  InstallationDate: Installed on 2016-07-08 (929 days ago)
  InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: coreutils
  UpgradeStatus: No upgrade log present (probably fresh install)

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