Attempting to diagnose, I had added /var/run/utmp and /var/run/utmpx as
directories. I just removed those, same empty result:
# who
# who;echo $?
0
# strace who
execve("/usr/bin/who", ["who"], [/* 21 vars */]) = 0
brk(NULL) = 0x1726000
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) = 0x7efc0bce0000
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) =
0x7efc0bcdf000
mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7efc0b70e000
mprotect(0x7efc0b8ce000, 2097152, PROT_NONE) = 0
mmap(0x7efc0bace000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c0000) = 0x7efc0bace000
mmap(0x7efc0bad4000, 14752, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7efc0bad4000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7efc0bcde000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7efc0bcdd000
arch_prctl(ARCH_SET_FS, 0x7efc0bcde700) = 0
mprotect(0x7efc0bace000, 16384, PROT_READ) = 0
mprotect(0x60a000, 4096, PROT_READ) = 0
mprotect(0x7efc0bcfd000, 4096, PROT_READ) = 0
munmap(0x7efc0bce0000, 117369) = 0
brk(NULL) = 0x1726000
brk(0x1747000) = 0x1747000
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) = 0x7efc0b436000
close(3) = 0
access("/var/run/utmpx", F_OK) = -1 ENOENT (No such file or directory)
open("/var/run/utmp", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or
directory)
access("/var/run/utmpx", F_OK) = -1 ENOENT (No such file or directory)
open("/var/run/utmp", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or
directory)
close(1) = 0
close(2) = 0
exit_group(0) = ?
+++ exited with 0 +++
#
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https://bugs.launchpad.net/bugs/1813052
Title:
who returns no results
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