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bug#18386: logname fails with error "logname: no login name" (is there a
From: |
Linda Walsh |
Subject: |
bug#18386: logname fails with error "logname: no login name" (is there an echo in here) |
Date: |
Wed, 03 Sep 2014 02:06:55 -0700 |
User-agent: |
Thunderbird |
Bernhard Voelker wrote:
On 09/02/2014 02:06 AM, Linda Walsh wrote:
logname
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"
----
With the same I get:
ltrace -f logname|& more
[pid 40807] __libc_start_main(0x4017c0, 1, 0x7fff8b0306f8, 0x4042d0 <unfinished
...>
[pid 40807] strrchr("logname", '/') = nil
[pid 40807] setlocale(LC_ALL, "") =
"LC_CTYPE=en_US.UTF-8;LC_NUMERIC="...
[pid 40807] bindtextdomain("coreutils", "/usr/share/locale") =
"/usr/share/locale"
[pid 40807] textdomain("coreutils") = "coreutils"
[pid 40807] __cxa_atexit(0x401c20, 0, 0, 0x736c6974756572) = 0
[pid 40807] getopt_long(1, 0x7fff8b0306f8, "", 0, nil) = -1
[pid 40807] getlogin() = nil
----
which in turn seems to retrieve the information like this:
$ strace logname
...
open("/proc/self/loginuid", O_RDONLY) = 3
----
I don't have a /proc/self/loginuid
How is it enabled in a vanilla kernel?
read(3, "717", 12) = 3
close(3) = 0
socket(PF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
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?
---
Yup.... mine is stock from kernel.org
I don't recall seeing any option for loginuid.
What module is it? I probably don't have it mounted.