Re: Cannot login or su

["CN" <cnliou9@fastmail.fm>]

Hi! Ricky,

I have successfully booted to single user mode and installed strace and
have acquired the following excerpt of its output. Someone please
interpret it for me?

Regards,
CN
=================
[snip]
time([1089177704])                      = 1089177704
getpid()                                = 868
rt_sigaction(SIGPIPE, {0x4012af80, [], SA_RESTORER, 0x40080658},
{SIG_DFL}, 8) = 0
send(4, "<83>Jul  7 13:21:44 su[868]: PAM"..., 87, 0) = 87
rt_sigaction(SIGPIPE, {SIG_DFL}, NULL, 8) = 0
time([1089177704])                      = 1089177704
getpid()                                = 868
rt_sigaction(SIGPIPE, {0x4012af80, [], SA_RESTORER, 0x40080658},
{SIG_DFL}, 8) = 0
send(4, "<83>Jul  7 13:21:44 su[868]: PAM"..., 64, 0) = 64
rt_sigaction(SIGPIPE, {SIG_DFL}, NULL, 8) = 0
read(3, "", 4096)                       = 0
close(3)                                = 0
munmap(0x40018000, 4096)                = 0
open("/etc/passwd", O_RDONLY)           = 3
fcntl64(3, F_GETFD)                     = 0
fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
_llseek(3, 0, [0], SEEK_CUR)            = 0
fstat64(3, {st_mode=S_IFREG|0644, st_size=889, ...}) = 0
mmap2(NULL, 889, PROT_READ, MAP_SHARED, 3, 0) = 0x40018000
_llseek(3, 889, [889], SEEK_SET)        = 0
munmap(0x40018000, 889)                 = 0
close(3)                                = 0
rt_sigaction(SIGINT, {SIG_IGN}, {SIG_DFL}, 8) = 0
time(NULL)                              = 1089177704
getuid32()                              = 1000
time([1089177704])                      = 1089177704
getpid()                                = 868
rt_sigaction(SIGPIPE, {0x4012af80, [], SA_RESTORER, 0x40080658},
{SIG_DFL}, 8) = 0
send(4, "<83>Jul  7 13:21:44 su[868]: pam"..., 64, 0) = 64
rt_sigaction(SIGPIPE, {SIG_DFL}, NULL, 8) = 0
write(2, "su: Module is unknown\n", 22) = 22
munmap(0x40019000, 7036)                = 0
open("/etc/login.defs", O_RDONLY)       = 3
[snip]