[erlang-questions] Could not open pty master
Iván Martínez
ivan.martinez@REDACTED
Sat Sep 27 11:27:42 CEST 2014
Thank you Antoine. I'm a developer rather than a systems administrator, I
didn't know strace existed. I have tried it but I don't know what to make
from the output:
$ strace run_erl priv/ log "erl"
execve("/usr/local/bin/run_erl", ["run_erl", "priv/", "log", "erl"], [/* 23
vars */]) = 0
brk(0) = 0x60c000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f794a62f000
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=32636, ...}) = 0
mmap(NULL, 32636, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f794a627000
close(3) = 0
open("/lib64/libutil.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3,
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\17\0\0\0\0\0\0"..., 832)
= 832
fstat(3, {st_mode=S_IFREG|0755, st_size=14608, ...}) = 0
mmap(NULL, 2105616, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f794a20d000
mprotect(0x7f794a20f000, 2093056, PROT_NONE) = 0
mmap(0x7f794a40e000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0x7f794a40e000
close(3) = 0
open("/lib64/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3,
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\16\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=19512, ...}) = 0
mmap(NULL, 2109744, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f794a009000
mprotect(0x7f794a00c000, 2093056, PROT_NONE) = 0
mmap(0x7f794a20b000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f794a20b000
close(3) = 0
open("/lib64/libm.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\0\260T\0\0\0\0\0\0"..., 832)
= 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1141552, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f794a626000
mmap(NULL, 3150168, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f7949d07000
mprotect(0x7f7949e08000, 2093056, PROT_NONE) = 0
mmap(0x7f794a007000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x100000) = 0x7f794a007000
close(3) = 0
open("/lib64/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\0\0\34\2\0\0\0\0\0"..., 832)
= 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2107600, ...}) = 0
mmap(NULL, 3932736, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f7949946000
mprotect(0x7f7949afc000, 2097152, PROT_NONE) = 0
mmap(0x7f7949cfc000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1b6000) = 0x7f7949cfc000
mmap(0x7f7949d02000, 16960, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f7949d02000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f794a625000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f794a623000
arch_prctl(ARCH_SET_FS, 0x7f794a623740) = 0
mprotect(0x7f7949cfc000, 16384, PROT_READ) = 0
mprotect(0x7f794a007000, 4096, PROT_READ) = 0
mprotect(0x7f794a20b000, 4096, PROT_READ) = 0
mprotect(0x7f794a40e000, 4096, PROT_READ) = 0
mprotect(0x604000, 4096, PROT_READ) = 0
mprotect(0x7f794a630000, 4096, PROT_READ) = 0
munmap(0x7f794a627000, 32636) = 0
brk(0) = 0x60c000
brk(0x62f000) = 0x62f000
brk(0) = 0x62f000
openat(AT_FDCWD, "priv/", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
getdents(3, /* 6 entries */, 32768) = 200
getdents(3, /* 0 entries */, 32768) = 0
close(3) = 0
mknod("priv/erlang.pipe.2.r", S_IFIFO|0666) = 0
open("priv/erlang.pipe.2.w", O_WRONLY|O_NONBLOCK) = -1 ENOENT (No such file
or directory)
mknod("priv/erlang.pipe.2.w", S_IFIFO|0666) = 0
open("/dev/ptmx", O_RDWR) = 3
statfs("/dev/pts", {f_type="DEVPTS_SUPER_MAGIC", f_bsize=4096, f_blocks=0,
f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255,
f_frsize=4096}) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B38400 opost isig icanon echo ...}) = 0
ioctl(3, TIOCGPTN, [1]) = 0
stat("/dev/pts/1", {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 1), ...}) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B38400 opost isig icanon echo ...}) = 0
ioctl(3, TIOCGPTN, [1]) = 0
stat("/dev/pts/1", {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 1), ...}) = 0
getuid() = 998
socket(PF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 4
connect(4, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = -1
ENOENT (No such file or directory)
close(4) = 0
socket(PF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 4
connect(4, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = -1
ENOENT (No such file or directory)
close(4) = 0
open("/etc/nsswitch.conf", O_RDONLY|O_CLOEXEC) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=1728, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f794a62e000
read(4, "#\n# /etc/nsswitch.conf\n#\n# An ex"..., 4096) = 1728
read(4, "", 4096) = 0
close(4) = 0
munmap(0x7f794a62e000, 4096) = 0
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=32636, ...}) = 0
mmap(NULL, 32636, PROT_READ, MAP_PRIVATE, 4, 0) = 0x7f794a627000
close(4) = 0
open("/lib64/libnss_files.so.2", O_RDONLY|O_CLOEXEC) = 4
read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@\"\0\0\0\0\0\0"...,
832) = 832
fstat(4, {st_mode=S_IFREG|0755, st_size=58288, ...}) = 0
mmap(NULL, 2144360, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0) =
0x7f794973a000
mprotect(0x7f7949745000, 2093056, PROT_NONE) = 0
mmap(0x7f7949944000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0xa000) = 0x7f7949944000
close(4) = 0
mprotect(0x7f7949944000, 4096, PROT_READ) = 0
munmap(0x7f794a627000, 32636) = 0
open("/etc/group", O_RDONLY|O_CLOEXEC) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=591, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f794a62e000
read(4, "root:x:0:\nbin:x:1:\ndaemon:x:2:\ns"..., 4096) = 591
close(4) = 0
munmap(0x7f794a62e000, 4096) = 0
chown("/dev/pts/1", 998, 5) = -1 EPERM (Operation not permitted)
close(3) = 0
open("/dev/ptmx", O_RDWR) = 3
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B38400 opost isig icanon echo ...}) = 0
ioctl(3, TIOCGPTN, [1]) = 0
stat("/dev/pts/1", {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 1), ...}) = 0
getuid() = 998
chown("/dev/pts/1", 998, 5) = -1 EPERM (Operation not permitted)
close(3) = 0
open("/etc/localtime", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=118, ...}) = 0
fstat(3, {st_mode=S_IFREG|0644, st_size=118, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f794a62e000
read(3, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\0"...,
4096) = 118
lseek(3, -62, SEEK_CUR) = 56
read(3, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\0"...,
4096) = 62
close(3) = 0
munmap(0x7f794a62e000, 4096) = 0
getpid() = 5161
write(2, "run_erl:187 [5161] Sat Sep 27 09"..., 44run_erl:187 [5161] Sat
Sep 27 09:19:59 2014
) = 44
write(2, "errno=1 'Operation not permitted"..., 60errno=1 'Operation not
permitted'
Could not open pty master
) = 60
exit_group(1) = ?
+++ exited with 1 +++
2014-09-26 22:39 GMT+02:00 Antoine Koener <antoine.koener@REDACTED>:
> Hello, why do you not just run strace to see ?
>
> On 26 Sep 2014, at 18:12, Iván Martínez <ivan.martinez@REDACTED>
> wrote:
>
> I have done chmod 777 to /dev, /dev/pty*, /dev/pts and /dev/pts/* and it
> didn't help. Must be something different from file access permits. Anybody
> has a clue of what run_erl does and requires?.
> Thank you,
> Ivan
>
> 2014-09-25 10:41 GMT+02:00 Iván Martínez <ivan.martinez@REDACTED>:
>
>> Thank you. Looks like SELinux has nothing to do with the issue:
>>
>> $ setenforce 0
>> setenforce: SELinux is disabled
>>
>>
>> 2014-09-25 3:21 GMT+02:00 zxq9 <zxq9@REDACTED>:
>>
>>> On Wednesday 24 September 2014 21:00:32 Iván Martínez wrote:
>>> > Hello all,
>>> > Does anyone know why I'm having the following issue with a CentOS 7
>>> system
>>> > with kernel 3.10.23?:
>>> >
>>> > $ run_erl priv/ log "erl"
>>> > run_erl:187 [6505] Wed Sep 24 18:42:39 2014
>>> > errno=1 'Operation not permitted'
>>> > Could not open pty master
>>> >
>>> > It works as super user. It also works in a Fedora 20 system with kernel
>>> > 3.16. I couldn't find any difference in user groups or /dev file
>>> permits
>>> > between both systems. Starting with a user with UID above or below
>>> UID_MIN
>>> > doesn't make any difference. I don't think it matters, but the only
>>> > difference I could find is that the CentOS has many /dev/pty* files
>>> already
>>> > created, while the Fedora doesn't have any.
>>>
>>> You might be running into SELinux permission issues. To find out try
>>> doing
>>> "setenforce 0" and then running it again. If that works, use a tool like
>>> audit2allow or audit2why to create a policy that will permit the actions
>>> you
>>> require to run your program. I haven't kept up with the Fedora/RHEL world
>>> since 7 came out, but Dan Walsh's blog and Red Hat's SELinux docs have
>>> been
>>> good resources on this in the past.
>>>
>>> Of course, you might have a totally different issue, but SELinux
>>> booleans and
>>> audit logs are the first thing I check on a Fedora-type distro when
>>> something
>>> doesn't work but looks like it should.
>>> _______________________________________________
>>> erlang-questions mailing list
>>> erlang-questions@REDACTED
>>> http://erlang.org/mailman/listinfo/erlang-questions
>>>
>>
>>
> _______________________________________________
> erlang-questions mailing list
> erlang-questions@REDACTED
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>
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