Thanks for your suggestion, Freddy. Looks like I found something.
open("/usr/share/locale/locale.alias", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2570, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x7febc61a5000
read(3, "# Locale name alias data base.\n#"..., 4096) = 2570
read(3, "", 4096) = 0
close(3) = 0
munmap(0x7febc61a5000, 4096) = 0
open("/usr/share/locale/en_US/LC_MESSAGES/shadow.mo", O_RDONLY) = -1
ENOENT (No such file or directory)
open("/usr/share/locale/en/LC_MESSAGES/shadow.mo", O_RDONLY) = -1 ENOENT
(No such file or directory)
write(2, "su: must be run from a terminal\n", 32) = 32
exit_group(1) = ?
It's the end of the file. I attach whole file.
Looks like su thinks it's not a terminal, but obviously it is. I really
don't have an idea why. Any suggestions?
On 12/16/2011 09:07 PM, Freddy Spierenburg wrote:
> Hi Marko,
>
> On Fri, Dec 16, 2011 at 08:51:58PM +0100, Marko Randjelovic wrote:
>
>> su does not ask for a password, just exits imediately with exit status 1.
>>
> Have you already tried to strace it, to possibly see what's going
> on? And if so, where does it end?
>
>
>
execve("/bin/su", ["/bin/su"], [/* 21 vars */]) = 0
brk(0) = 0x6f6000
fcntl(0, F_GETFD) = 0
fcntl(1, F_GETFD) = 0
fcntl(2, F_GETFD) = 0
access("/etc/suid-debug", F_OK) = -1 ENOENT (No such file or directory)
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7febc61a6000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=97633, ...}) = 0
mmap(NULL, 97633, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7febc618e000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libpam.so.0", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200%\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=49728, ...}) = 0
mmap(NULL, 2144864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7febc5d7f000
mprotect(0x7febc5d8b000, 2093056, PROT_NONE) = 0
mmap(0x7febc5f8a000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xb000) = 0x7febc5f8a000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libpam_misc.so.0", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\20\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=11016, ...}) = 0
mmap(NULL, 2106272, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7febc5b7c000
mprotect(0x7febc5b7e000, 2097152, PROT_NONE) = 0
mmap(0x7febc5d7e000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7febc5d7e000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\355\1\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1432968, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7febc618d000
mmap(NULL, 3541032, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7febc581b000
mprotect(0x7febc5973000, 2093056, PROT_NONE) = 0
mmap(0x7febc5b72000, 20480, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x157000) = 0x7febc5b72000
mmap(0x7febc5b77000, 18472, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7febc5b77000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libdl.so.2", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\r\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=14696, ...}) = 0
mmap(NULL, 2109696, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7febc5617000
mprotect(0x7febc5619000, 2097152, PROT_NONE) = 0
mmap(0x7febc5819000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7febc5819000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libcrypt.so.1", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\n\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=35104, ...}) = 0
mmap(NULL, 2318784, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7febc53e0000
mprotect(0x7febc53e8000, 2093056, PROT_NONE) = 0
mmap(0x7febc55e7000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7000) = 0x7febc55e7000
mmap(0x7febc55e9000, 184768, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7febc55e9000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7febc618c000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7febc618b000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7febc618a000
arch_prctl(ARCH_SET_FS, 0x7febc618b700) = 0
mprotect(0x7febc55e7000, 4096, PROT_READ) = 0
mprotect(0x7febc5819000, 4096, PROT_READ) = 0
mprotect(0x7febc5b72000, 16384, PROT_READ) = 0
mprotect(0x7febc61a8000, 4096, PROT_READ) = 0
munmap(0x7febc618e000, 97633) = 0
brk(0) = 0x6f6000
brk(0x717000) = 0x717000
open("/usr/lib/locale/locale-archive", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2958368, ...}) = 0
mmap(NULL, 2958368, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7febc510d000
close(3) = 0
getuid() = 1000
ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, 0x7fff98fbd270) = -1 ENOTTY
(Inappropriate ioctl for device)
ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, 0x7fff98fbd3e0) = -1 ENOTTY
(Inappropriate ioctl for device)
open("/usr/share/locale/locale.alias", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2570, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7febc61a5000
read(3, "# Locale name alias data base.\n#"..., 4096) = 2570
read(3, "", 4096) = 0
close(3) = 0
munmap(0x7febc61a5000, 4096) = 0
open("/usr/share/locale/en_US/LC_MESSAGES/shadow.mo", O_RDONLY) = -1 ENOENT (No
such file or directory)
open("/usr/share/locale/en/LC_MESSAGES/shadow.mo", O_RDONLY) = -1 ENOENT (No
such file or directory)
write(2, "su: must be run from a terminal\n", 32) = 32
exit_group(1) = ?
