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bug#18386: logname fails with error "logname: no login name" (is there a

From: Bernhard Voelker
Subject: bug#18386: logname fails with error "logname: no login name" (is there an echo in here)
Date: Tue, 02 Sep 2014 12:35:58 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.7.0

On 09/02/2014 02:06 AM, Linda Walsh wrote:
logname: no login name

logname(1) works here on a regular openSUSE-13.1 system, and
just calls getlogin(3) to get the information as required:

  $ ltrace logname
  getlogin()                 = "berny"

which in turn seems to retrieve the information like this:

  $ strace logname
  open("/proc/self/loginuid", O_RDONLY)   = 3
  read(3, "717", 12)                      = 3
  close(3)                                = 0
  connect(3, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = 0
  sendto(3, "\2\0\0\0\v\0\0\0\7\0\0\0passwd\0", 19, MSG_NOSIGNAL, NULL, 0) = 19

Don't you have /proc mounted?

Ishtar:/> who -a
Ishtar:/> who -t
Ishtar:/> who -u
Ishtar:/> who -b
Linux Ishtar 3.16.0-Isht-Van #1 SMP PREEMPT Tue Aug 12 11:11:02 PDT 2014 x86_64 
x86_64 x86_64 GNU/Linux

I wonder if the who command's output being broken is related?

Similar for who(1) here:

  $ strace who
  open("/var/run/utmp", O_RDONLY|O_CLOEXEC) = 3

Distro is a 13.1 SuSE base, but wouldn't call it a stock system (still boots 

It looks like trying to avoid systemd is not that easy ...

Have a nice day,

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