Re: expect + telnet hangs on AIX

Don Libes <libes@xxxxxxxx> wrote in message news:<s6a8y3nedg9.fsf@xxxxxxxxxxxxxxxxxx>...
> kkivi@xxxxxxxxxx (Konstantin Kivi) writes:
>
> > Don Libes <libes@xxxxxxxx> wrote in message news:<s6afyxxe0vx.fsf@xxxxxxxxxxxxxxxxxx>...
> > > kkivi@xxxxxxxxxx (Konstantin Kivi) writes:
> > >
> > > > >
> > > > > Use autoexpect <URL: http://wiki.tcl.tk/autoexpect >.
> > > > > It's ideal help in such situations.
> > > >
> > > > Unfortunataly, it hangs too, after writing that script.exp is
> > > > created.
> > > >
> > > > It's interesting that ps doesn't show any 'expect' instances,
> > > > only 'sh'. When I kill 'sh' the session is still hanging. I have
> > > > to kill ssh client from my cleint maachine.
> > >
> > > Your description is too vague. Let's start over - can you get Expect
> > > to interact with any program properly? Is it only telnet that
> > > misbehaves? Is it only telnet to a particular host that misbehaves?
> > > And what versions of Expect and AIX are you using?
> > >
> > > Don
> >
> >
> > Don,
> >
> > AIX version is 5.3
> >
> > [grs1]/grs1/home/tst > expect -v
> > expect version 5.43.0
> > [grs1]/grs1/home/tst >
> > [grs1]/grs1/home/tst > ldd `which expect`
> > /usr/local/bin/expect needs:
> > /usr/lib/libc.a(shr.o)
> > /usr/local/lib/libtcl8.4.so
> > /unix
> > /usr/lib/libcrypt.a(shr.o)
> > /usr/lib/libdl.a(shr.o)
> > [grs1]/grs1/home/tst >
> >
> > here is sample client
> > ==============================
> > #!/bin/sh
> >
> > echo ==
> > while read aaa ; do
> > if [ "$aaa" = "quit" ] ; then
> > exit 1;
> > fi
> > echo $aaa $aaa
> > echo ==
> > done
> > ===========================
> >
> > here is sample script
> > ========================
> > spawn exp.sh
> >
> > expect "==" { sleep .1 ; send "bbb\r" }
> > expect "==" { sleep .1 ; send "quit\r" }
> > ======================================
> > This script hangs 80% of the time
> >
> > When running expect -d it never hangs
> >
> >
> > If I add
> > puts "bye"
> > at the end of samle script it hangs 25 % times
> >
> > If I run it with nohup it never hangs.
>
> The presence of "sleep .1" and your comment about it not hanging when
> you use -d suggest that your script is time-dependent. In that case,
> you simply need to account for the time dependencies better - for
> example by sleeping longer or in different places.

I added sleep without much thought. It's like slow_send.

>
> On the other hand, if you are claiming that Expect is truly hung where
> it shouldn't be, you need to show that more conclusively, for example,
> by explicitly setting Expect's timeout and defining exactly what you
> mean by "hung" including where in the script it is stopping -
> including diagnostic output (from -d) (and if that's still not
> sufficient, a system call trace).
>

I found a remedy for my problem.
adding
'close stdout '
at the end of the script prevents hanging of expect.

I also have to wrap entire script in
if [ catch { lala lala lalala } res ] {
puts $res
}
close stdout
as any error prevents proper stdout closing .

I also seen one time or two in debug mode something like
' cannot write - sleep for 1 second' and then hang at exit time.

If you want to see the the syscall trace here is one

===========================truss -o explog expect <<EOF
if [ catch { set timeout 30
spawn telnet localhost 7700
expect {=>} {
sleep .5
send "restart_obr all\r"
}
} res ] {
puts $res
}

#close stdout
EOF

===========================
script connects to our custom systen and restart it.
everything work except that expect seems to hang .
ps shows that there is no more expect.

the trace is
=========================================

execve("/usr/local/bin/expect", 0x2FF22934, 0x2FF2293C) argc: 1
__loadx(0x0A040000, 0xD03CDAA4, 0x00000005, 0x10000000, 0x20000367) =
0x00000000_sigaction(13, 0x2FF22738, 0x2FF22748) = 0
sbrk(0x00000000) = 0x200081F0
__libc_sbrk(0x00000000) = 0x200081F0
__libc_sbrk(0x00000000) = 0x20018200
uname(0x2FF22658) = 0
access("/grs1/home/tst/bin/expect", 01) Err#2 ENOENT
access("/usr/local/gcc342/bin/expect", 01) Err#2 ENOENT
access("/usr/local/bin/expect", 01) = 0
statx("/usr/local/bin/expect", 0x2FF223E0, 128, 010) = 0
getuidx(4) = 233
getuidx(2) = 233
getuidx(1) = 233
getgidx(4) = 201
getgidx(2) = 201
getgidx(1) = 201
accessx("/usr/local/lib/tcl8.4/encoding", 0, 0) = 0
statx("/", 0x2FF206A8, 128, 011) = 0
statx("/usr", 0x2FF206A8, 128, 011) = 0
statx("/usr/local", 0x2FF206A8, 128, 011) = 0
statx("/usr/local/lib", 0x2FF206A8, 128, 011) = 0
statx("/usr/local/lib/tcl8.4", 0x2FF206A8, 128, 011) = 0
statx("/usr/local/lib/tcl8.4/encoding", 0x2FF206A8, 128, 011) = 0
open("/usr/local/lib/tcl8.4/encoding/iso8859-1.enc",
O_RDONLY|O_LARGEFILE) = 3
kfcntl(3, F_SETFD, 0x00000001) = 0
kioctl(3, 22528, 0x00000000, 0x00000000) Err#25 ENOTTY
kread(3, " # E n c o d i n g f".., 4096) = 1094
kread(3, " # E n c o d i n g f".., 4096) = 0
close(3) = 0
getuidx(4) = 233
getuidx(2) = 233
getuidx(1) = 233
getgidx(4) = 201
getgidx(2) = 201
getgidx(1) = 201
accessx("/usr/local/lib/tcl8.4", 0, 0) = 0
statx("/", 0x2FF20048, 128, 011) = 0
statx("/usr", 0x2FF20048, 128, 011) = 0
statx("/usr/local", 0x2FF20048, 128, 011) = 0
statx("/usr/local/lib", 0x2FF20048, 128, 011) = 0
statx("/usr/local/lib/tcl8.4", 0x2FF20048, 128, 011) = 0
access("/usr/local/lib/tcl8.4/init.tcl", 0) = 0
statx("/usr/local/lib/tcl8.4/init.tcl", 0x2FF21AE8, 128, 010) = 0
open("/usr/local/lib/tcl8.4/init.tcl", O_RDONLY|O_LARGEFILE) = 3
kfcntl(3, F_SETFD, 0x00000001) = 0
kioctl(3, 22528, 0x00000000, 0x00000000) Err#25 ENOTTY
kread(3, " # i n i t . t c l -".., 4096) = 4096
kread(3, " [ l l e n g t h [ i n".., 4096) = 4096
kread(3, " a c k t r a c e i n".., 4096) = 4096
kread(3, " c a s e , w e s u".., 4096) = 4096
kread(3, " # W i n d o w s s e".., 4096) = 4096
__libc_sbrk(0x00000000) = 0x20028210
kread(3, " e r r o r $ a c t i o".., 4096) = 2036
kread(3, " e r r o r $ a c t i o".., 4096) = 0
close(3) = 0
_getpid() = 447136
open("/dev/tty", O_RDWR) = 3
kioctl(3, 22528, 0x00000000, 0x00000000) = 0
kioctl(3, 21505, 0x20008180, 0x00000000) = 0
kioctl(3, 1074295912, 0x20006F9C, 0x00000000) = 0
kioctl(0, 22528, 0x00000000, 0x00000000) Err#25 ENOTTY
kioctl(1, 22528, 0x00000000, 0x00000000) = 0
_getpid() = 447136
kioctl(0, 22528, 0x00000000, 0x00000000) Err#25 ENOTTY
klseek(0, 0, 0, 0x00000001) = 0
kioctl(0, 22528, 0x00000000, 0x00000000) Err#25 ENOTTY
ngetsockname(0, 0x2FF225E8, 0x2FF225F8) Err#57 ENOTSOCK
klseek(1, 0, 0, 0x00000001) = 0
kioctl(1, 22528, 0x00000000, 0x00000000) = 0
kioctl(1, 22528, 0x00000000, 0x00000000) = 0
kioctl(1, 21505, 0x20020D78, 0x00000000) = 0
klseek(2, 0, 0, 0x00000001) = 0
kioctl(2, 22528, 0x00000000, 0x00000000) = 0
kioctl(2, 22528, 0x00000000, 0x00000000) = 0
kioctl(2, 21505, 0x20022F38, 0x00000000) = 0
kfcntl(0, F_GETFL, 0x00000001) = 67108864
kioctl(0, -2147195266, 0x2FF22578, 0x00000000) = 0
kioctl(0, -2147195267, 0x2FF22578, 0x00000000) = 0
kfcntl(0, F_SETFL, 0x04000004) = 0
kfcntl(0, F_GETFL, 0x2FF22FFC) = 67108868
kioctl(2, 22528, 0x00000000, 0x00000000) = 0
kfcntl(2, F_GETFL, 0x00000001) = 67110914
kioctl(2, -2147195266, 0x2FF22578, 0x00000000) Err#123 ENOSTR
kioctl(2, -2147195267, 0x2FF22578, 0x00000000) = 0
kfcntl(2, F_SETFL, 0x04000806) = 0
kfcntl(2, F_GETFL, 0x2FF22FFC) = 67110918
kfcntl(3, F_SETFD, 0x00000001) = 0
kfcntl(3, F_GETFL, 0x00000001) = 2
kioctl(3, -2147195266, 0x2FF22578, 0x00000000) Err#123 ENOSTR
kioctl(3, -2147195267, 0x2FF22578, 0x00000000) = 0
kfcntl(3, F_SETFL, 0x00000006) = 0
kfcntl(3, F_GETFL, 0x2FF22FFC) = 6
_sigaction(2, 0x2FF22400, 0x2FF22410) = 0
_sigaction(15, 0x2FF22400, 0x2FF22410) = 0
kioctl(0, 22528, 0x00000000, 0x00000000) Err#25 ENOTTY
open("/usr/local/lib/expect5.43/expect.rc", O_RDONLY) Err#2 ENOENT
open("/grs1/home/tst/.expect.rc", O_RDONLY) Err#2 ENOENT
kioctl(0, 22528, 0x00000000, 0x00000000) Err#25 ENOTTY
kread(0, " i f [ c a t c h {".., 4096) = 150
kwrite(1, " s p a w n", 5) = 5
kwrite(1, " ", 1) = 1
kwrite(1, " t e l n e t", 6) = 6
kwrite(1, " ", 1) = 1
kwrite(1, " l o c a l h o s t", 9) = 9
kwrite(1, " ", 1) = 1
kwrite(1, " 7 7 0 0", 4) = 4
kwrite(1, "\r\r\n", 3) = 3
open("/dev/ptc", O_RDWR) = 4
kioctl(4, 22529, 0x2FF20594, 0x00000000) = 0
statx("/dev/pts/15", 0x2FF205B8, 76, 0) = 0
kfcntl(4, F_SETFD, 0x00000001) = 0
pipe(0x2FF20C08) = 0
pipe(0x2FF20C10) = 0
pipe(0x2FF20C18) = 0
kfork() = 328562
close(6) = 0
close(7) = 0
close(10) = 0
kfcntl(4, F_SETFD, 0x00000001) = 0
kfcntl(4, F_GETFL, 0x00000001) = 2
kioctl(4, -2147195266, 0x2FF20858, 0x00000000) Err#123 ENOSTR
kioctl(4, -2147195267, 0x2FF20858, 0x00000000) = 0
kfcntl(4, F_SETFL, 0x00000006) = 0
kfcntl(4, F_GETFL, 0x2FF22FFC) = 6
kread(5, " ", 1) = 1
kwrite(8, " ", 1) = 1
close(5) = 0
close(8) = 0
kread(9, "\0\0\002", 4) = 0
close(9) = 0
_select(5, 0x2000E65C, 0x2001065C, 0x2001265C, 0x2FF20BE0) = 1
kread(4, " T r y i n g . . .\r\n C".., 4096) = 36
kwrite(1, " T r y i n g . . .\r\n C".., 36) = 36
_select(5, 0x2000E65C, 0x2001065C, 0x2001265C, 0x2FF20BE0) = 1
kread(4, " E s c a p e c h a r a".., 4096) = 27
kwrite(1, " E s c a p e c h a r a".., 27) = 27
_select(5, 0x2000E65C, 0x2001065C, 0x2001265C, 0x2FF20BE0) = 1
kread(4, " 0\r\n\r\r\n = = > a r a".., 4096) = 9
kwrite(1, " 0\r\n\r\r\n = = >", 9) = 9
_select(0, 0x2000E65C, 0x2001065C, 0x2001265C, 0x2FF207C0) = 0
kwrite(4, " r e s t a r t _ o b r ".., 16) = 16
kread(0, " i f [ c a t c h {".., 4096) = 0
kioctl(3, 22528, 0x00000000, 0x00000000) = 0
kfcntl(4, F_GETFL, 0x00000000) = 6
kioctl(4, -2147195266, 0x2FF220F8, 0x00000000) Err#123 ENOSTR
kioctl(4, -2147195267, 0x2FF220F8, 0x00000000) = 0
kfcntl(4, F_SETFL, 0x00000002) = 0
kfcntl(4, F_GETFL, 0x2FF22FFC) = 2
close(4) = 0
open("/dev/null", O_RDONLY) = 4
kfcntl(4, F_SETFD, 0x00000001) = 0
kfcntl(3, F_GETFL, 0x00000000) = 6
kioctl(3, -2147195266, 0x2FF220F8, 0x00000000) Err#123 ENOSTR
kioctl(3, -2147195267, 0x2FF220F8, 0x00000000) = 0
kfcntl(3, F_SETFL, 0x00000002) = 0
kfcntl(3, F_GETFL, 0x2FF22FFC) = 2
close(3) = 0
open("/dev/null", O_RDONLY) = 3
kfcntl(3, F_SETFD, 0x00000001) = 0
kfcntl(2, F_GETFL, 0x00000000) = 67110918
kioctl(2, -2147195266, 0x2FF220F8, 0x00000000) Err#123 ENOSTR
kioctl(2, -2147195267, 0x2FF220F8, 0x00000000) = 0
kfcntl(2, F_SETFL, 0x04000802) = 0
kfcntl(2, F_GETFL, 0x2FF22FFC) = 67110914
close(2) = 0
open("/dev/null", O_RDONLY) = 2
kfcntl(2, F_SETFD, 0x00000001) = 0
kfcntl(0, F_GETFL, 0x00000000) = 67108868
kioctl(0, -2147195266, 0x2FF220F8, 0x00000000) = 0
kioctl(0, -2147195267, 0x2FF220F8, 0x00000000) = 0
kfcntl(0, F_SETFL, 0x04000000) = 0
kfcntl(0, F_GETFL, 0x2FF22FFC) = 67108864
kwrite(1, 0x20035748, 0) = 0
_nsleep(0x2FF22138, 0x2FF221B0) = 0
close(0) = 0
close(1) = 0
open("/dev/null", O_RDONLY) = 0
kfcntl(0, F_SETFD, 0x00000001) = 0
kfcntl(4, F_GETFL, 0x00000000) = 0
kioctl(4, -2147195266, 0x2FF22150, 0x00000000) Err#19 ENODEV
kioctl(4, -2147195267, 0x2FF22150, 0x00000000) Err#19 ENODEV
kfcntl(4, F_SETFL, 0x00000000) = 0
kfcntl(4, F_GETFL, 0x2FF22FFC) = 0
close(4) = 0
kfcntl(3, F_GETFL, 0x00000000) = 0
kioctl(3, -2147195266, 0x2FF22150, 0x00000000) Err#19 ENODEV
kioctl(3, -2147195267, 0x2FF22150, 0x00000000) Err#19 ENODEV
kfcntl(3, F_SETFL, 0x00000000) = 0
kfcntl(3, F_GETFL, 0x2FF22FFC) = 0
close(3) = 0
kfcntl(2, F_GETFL, 0x00000000) = 0
kioctl(2, -2147195266, 0x2FF22150, 0x00000000) Err#19 ENODEV
kioctl(2, -2147195267, 0x2FF22150, 0x00000000) Err#19 ENODEV
kfcntl(2, F_SETFL, 0x00000000) = 0
kfcntl(2, F_GETFL, 0x2FF22FFC) = 0
close(2) = 0
kfcntl(2, F_GETFL, 0x00000000) Err#9 EBADF
kioctl(2, -2147195266, 0x2FF22160, 0x00000000) Err#9 EBADF
kioctl(2, -2147195267, 0x2FF22160, 0x00000000) Err#9 EBADF
kfcntl(2, F_SETFL, 0xFFFFFFFB) Err#9 EBADF
kfcntl(1, F_GETFL, 0x00000000) Err#9 EBADF
kioctl(1, -2147195266, 0x2FF22160, 0x00000000) Err#9 EBADF
kioctl(1, -2147195267, 0x2FF22160, 0x00000000) Err#9 EBADF
kfcntl(1, F_SETFL, 0xFFFFFFFB) Err#9 EBADF
kfcntl(0, F_GETFL, 0x00000000) = 0
kioctl(0, -2147195266, 0x2FF22160, 0x00000000) Err#19 ENODEV
kioctl(0, -2147195267, 0x2FF22160, 0x00000000) Err#19 ENODEV
kfcntl(0, F_SETFL, 0x00000000) = 0
kfcntl(0, F_GETFL, 0x2FF22FFC) = 0
kfcntl(0, F_GETFL, 0x00000000) = 0
kioctl(0, -2147195266, 0x2FF22150, 0x00000000) Err#19 ENODEV
kioctl(0, -2147195267, 0x2FF22150, 0x00000000) Err#19 ENODEV
kfcntl(0, F_SETFL, 0x00000000) = 0
kfcntl(0, F_GETFL, 0x2FF22FFC) = 0
kwrite(1, 0x20035748, 0) Err#9 EBADF
close(0) = 0
kfcntl(1, F_GETFL, 0x200040D4) Err#9 EBADF
kfcntl(2, F_GETFL, 0x2FF22FF8) Err#9 EBADF
_exit(0)
konst@konst://.../konst>

after I uncomment close stdout trace changes as follows
1c1
< execve("/usr/local/bin/expect", 0x2FF22934, 0x2FF2293C) argc: 1
---
> execve("/usr/local/bin/expect", 0x2FF22910, 0x2FF22918) argc: 1
3c3
< _sigaction(13, 0x2FF22738, 0x2FF22748) = 0
---
> _sigaction(13, 0x2FF22718, 0x2FF22728) = 0
7c7
< uname(0x2FF22658) = 0
---
> uname(0x2FF22638) = 0
11c11
< statx("/usr/local/bin/expect", 0x2FF223E0, 128, 010) = 0
---
> statx("/usr/local/bin/expect", 0x2FF223C0, 128, 010) = 0
19,24c19,24
< statx("/", 0x2FF206A8, 128, 011) = 0
< statx("/usr", 0x2FF206A8, 128, 011) = 0
< statx("/usr/local", 0x2FF206A8, 128, 011) = 0
< statx("/usr/local/lib", 0x2FF206A8, 128, 011) = 0
< statx("/usr/local/lib/tcl8.4", 0x2FF206A8, 128, 011) = 0
< statx("/usr/local/lib/tcl8.4/encoding", 0x2FF206A8, 128, 011) = 0
---
> statx("/", 0x2FF20688, 128, 011) = 0
> statx("/usr", 0x2FF20688, 128, 011) = 0
> statx("/usr/local", 0x2FF20688, 128, 011) = 0
> statx("/usr/local/lib", 0x2FF20688, 128, 011) = 0
> statx("/usr/local/lib/tcl8.4", 0x2FF20688, 128, 011) = 0
> statx("/usr/local/lib/tcl8.4/encoding", 0x2FF20688, 128, 011) = 0
38,42c38,42
< statx("/", 0x2FF20048, 128, 011) = 0
< statx("/usr", 0x2FF20048, 128, 011) = 0
< statx("/usr/local", 0x2FF20048, 128, 011) = 0
< statx("/usr/local/lib", 0x2FF20048, 128, 011) = 0
< statx("/usr/local/lib/tcl8.4", 0x2FF20048, 128, 011) = 0
---
> statx("/", 0x2FF20028, 128, 011) = 0
> statx("/usr", 0x2FF20028, 128, 011) = 0
> statx("/usr/local", 0x2FF20028, 128, 011) = 0
> statx("/usr/local/lib", 0x2FF20028, 128, 011) = 0
> statx("/usr/local/lib/tcl8.4", 0x2FF20028, 128, 011) = 0
44c44
< statx("/usr/local/lib/tcl8.4/init.tcl", 0x2FF21AE8, 128, 010) = 0
---
> statx("/usr/local/lib/tcl8.4/init.tcl", 0x2FF21AC8, 128, 010) = 0
57c57
< _getpid() = 447136
---
> _getpid() = 442994
64c64
< _getpid() = 447136
---
> _getpid() = 442994
68c68
< ngetsockname(0, 0x2FF225E8, 0x2FF225F8) Err#57 ENOTSOCK
---
> ngetsockname(0, 0x2FF225C8, 0x2FF225D8) Err#57 ENOTSOCK
72c72
< kioctl(1, 21505, 0x20020D78, 0x00000000) = 0
---
> kioctl(1, 21505, 0x20020DE8, 0x00000000) = 0
76,81c76,81
< kioctl(2, 21505, 0x20022F38, 0x00000000) = 0
< kfcntl(0, F_GETFL, 0x00000001) = 67108864
< kioctl(0, -2147195266, 0x2FF22578, 0x00000000) = 0
< kioctl(0, -2147195267, 0x2FF22578, 0x00000000) = 0
< kfcntl(0, F_SETFL, 0x04000004) = 0
< kfcntl(0, F_GETFL, 0x2FF22FFC) = 67108868
---
> kioctl(2, 21505, 0x20022FA8, 0x00000000) = 0
> kfcntl(0, F_GETFL, 0x00000001) = 2
> kioctl(0, -2147195266, 0x2FF22558, 0x00000000) = 0
> kioctl(0, -2147195267, 0x2FF22558, 0x00000000) = 0
> kfcntl(0, F_SETFL, 0x00000006) = 0
> kfcntl(0, F_GETFL, 0x2FF22FFC) = 6
84,85c84,85
< kioctl(2, -2147195266, 0x2FF22578, 0x00000000) Err#123 ENOSTR
< kioctl(2, -2147195267, 0x2FF22578, 0x00000000) = 0
---
> kioctl(2, -2147195266, 0x2FF22558, 0x00000000) Err#123 ENOSTR
> kioctl(2, -2147195267, 0x2FF22558, 0x00000000) = 0
90,91c90,91
< kioctl(3, -2147195266, 0x2FF22578, 0x00000000) Err#123 ENOSTR
< kioctl(3, -2147195267, 0x2FF22578, 0x00000000) = 0
---
> kioctl(3, -2147195266, 0x2FF22558, 0x00000000) Err#123 ENOSTR
> kioctl(3, -2147195267, 0x2FF22558, 0x00000000) = 0
94,95c94,95
< _sigaction(2, 0x2FF22400, 0x2FF22410) = 0
< _sigaction(15, 0x2FF22400, 0x2FF22410) = 0
---
> _sigaction(2, 0x2FF223E0, 0x2FF223F0) = 0
> _sigaction(15, 0x2FF223E0, 0x2FF223F0) = 0
100c100
< kread(0, " i f [ c a t c h {".., 4096) = 150
---
> kread(0, " i f [ c a t c h {".., 4096) = 149
110,111c110,111
< kioctl(4, 22529, 0x2FF20594, 0x00000000) = 0
< statx("/dev/pts/15", 0x2FF205B8, 76, 0) = 0
---
> kioctl(4, 22529, 0x2FF20574, 0x00000000) = 0
> statx("/dev/pts/12", 0x2FF20598, 76, 0) = 0
113,116c113,116
< pipe(0x2FF20C08) = 0
< pipe(0x2FF20C10) = 0
< pipe(0x2FF20C18) = 0
< kfork() = 328562
---
> pipe(0x2FF20BE8) = 0
> pipe(0x2FF20BF0) = 0
> pipe(0x2FF20BF8) = 0
> kfork() = 312166
122,123c122,123
< kioctl(4, -2147195266, 0x2FF20858, 0x00000000) Err#123 ENOSTR
< kioctl(4, -2147195267, 0x2FF20858, 0x00000000) = 0
---
> kioctl(4, -2147195266, 0x2FF20838, 0x00000000) Err#123 ENOSTR
> kioctl(4, -2147195267, 0x2FF20838, 0x00000000) = 0
132c132
< _select(5, 0x2000E65C, 0x2001065C, 0x2001265C, 0x2FF20BE0) = 1
---
> _select(5, 0x2000E65C, 0x2001065C, 0x2001265C, 0x2FF20BC0) = 1
135c135
< _select(5, 0x2000E65C, 0x2001065C, 0x2001265C, 0x2FF20BE0) = 1
---
> _select(5, 0x2000E65C, 0x2001065C, 0x2001265C, 0x2FF20BC0) = 1
138c138
< _select(5, 0x2000E65C, 0x2001065C, 0x2001265C, 0x2FF20BE0) = 1
---
> _select(5, 0x2000E65C, 0x2001065C, 0x2001265C, 0x2FF20BC0) = 1
141c141
< _select(0, 0x2000E65C, 0x2001065C, 0x2001265C, 0x2FF207C0) = 0
---
> _select(0, 0x2000E65C, 0x2001065C, 0x2001265C, 0x2FF207A0) = 0
142a143
> close(1) = 0
146,147c147,148
< kioctl(4, -2147195266, 0x2FF220F8, 0x00000000) Err#123 ENOSTR
< kioctl(4, -2147195267, 0x2FF220F8, 0x00000000) = 0
---
> kioctl(4, -2147195266, 0x2FF220D8, 0x00000000) Err#123 ENOSTR
> kioctl(4, -2147195267, 0x2FF220D8, 0x00000000) = 0
151c152,154
< open("/dev/null", O_RDONLY) = 4
---
> open("/dev/null", O_RDONLY) = 1
> kfcntl(1, F_DUPFD, 0x00000004) = 4
> close(1) = 0
154,155c157,158
< kioctl(3, -2147195266, 0x2FF220F8, 0x00000000) Err#123 ENOSTR
< kioctl(3, -2147195267, 0x2FF220F8, 0x00000000) = 0
---
> kioctl(3, -2147195266, 0x2FF220D8, 0x00000000) Err#123 ENOSTR
> kioctl(3, -2147195267, 0x2FF220D8, 0x00000000) = 0
159c162,164
< open("/dev/null", O_RDONLY) = 3
---
> open("/dev/null", O_RDONLY) = 1
> kfcntl(1, F_DUPFD, 0x00000003) = 3
> close(1) = 0
162,163c167,168
< kioctl(2, -2147195266, 0x2FF220F8, 0x00000000) Err#123 ENOSTR
< kioctl(2, -2147195267, 0x2FF220F8, 0x00000000) = 0
---
> kioctl(2, -2147195266, 0x2FF220D8, 0x00000000) Err#123 ENOSTR
> kioctl(2, -2147195267, 0x2FF220D8, 0x00000000) = 0
167c172,174
< open("/dev/null", O_RDONLY) = 2
---
> open("/dev/null", O_RDONLY) = 1
> kfcntl(1, F_DUPFD, 0x00000002) = 2
> close(1) = 0
169,175c176,181
< kfcntl(0, F_GETFL, 0x00000000) = 67108868
< kioctl(0, -2147195266, 0x2FF220F8, 0x00000000) = 0
< kioctl(0, -2147195267, 0x2FF220F8, 0x00000000) = 0
< kfcntl(0, F_SETFL, 0x04000000) = 0
< kfcntl(0, F_GETFL, 0x2FF22FFC) = 67108864
< kwrite(1, 0x20035748, 0) = 0
< _nsleep(0x2FF22138, 0x2FF221B0) = 0
---
> kfcntl(0, F_GETFL, 0x00000000) = 6
> kioctl(0, -2147195266, 0x2FF220D8, 0x00000000) = 0
> kioctl(0, -2147195267, 0x2FF220D8, 0x00000000) = 0
> kfcntl(0, F_SETFL, 0x00000002) = 0
> kfcntl(0, F_GETFL, 0x2FF22FFC) = 2
> kwrite(1, 0x200357B8, 0) Err#9 EBADF
177c183
< close(1) = 0
---
> close(1) Err#9 EBADF
181,182c187,188
< kioctl(4, -2147195266, 0x2FF22150, 0x00000000) Err#19 ENODEV
< kioctl(4, -2147195267, 0x2FF22150, 0x00000000) Err#19 ENODEV
---
> kioctl(4, -2147195266, 0x2FF22130, 0x00000000) Err#19 ENODEV
> kioctl(4, -2147195267, 0x2FF22130, 0x00000000) Err#19 ENODEV
187,188c193,194
< kioctl(3, -2147195266, 0x2FF22150, 0x00000000) Err#19 ENODEV
< kioctl(3, -2147195267, 0x2FF22150, 0x00000000) Err#19 ENODEV
---
> kioctl(3, -2147195266, 0x2FF22130, 0x00000000) Err#19 ENODEV
> kioctl(3, -2147195267, 0x2FF22130, 0x00000000) Err#19 ENODEV
193,194c199,200
< kioctl(2, -2147195266, 0x2FF22150, 0x00000000) Err#19 ENODEV
< kioctl(2, -2147195267, 0x2FF22150, 0x00000000) Err#19 ENODEV
---
> kioctl(2, -2147195266, 0x2FF22130, 0x00000000) Err#19 ENODEV
> kioctl(2, -2147195267, 0x2FF22130, 0x00000000) Err#19 ENODEV
199,200c205,206
< kioctl(2, -2147195266, 0x2FF22160, 0x00000000) Err#9 EBADF
< kioctl(2, -2147195267, 0x2FF22160, 0x00000000) Err#9 EBADF
---
> kioctl(2, -2147195266, 0x2FF22140, 0x00000000) Err#9 EBADF
> kioctl(2, -2147195267, 0x2FF22140, 0x00000000) Err#9 EBADF
202,205d207
< kfcntl(1, F_GETFL, 0x00000000) Err#9 EBADF
< kioctl(1, -2147195266, 0x2FF22160, 0x00000000) Err#9 EBADF
< kioctl(1, -2147195267, 0x2FF22160, 0x00000000) Err#9 EBADF
< kfcntl(1, F_SETFL, 0xFFFFFFFB) Err#9 EBADF
207,208c209,210
< kioctl(0, -2147195266, 0x2FF22160, 0x00000000) Err#19 ENODEV
< kioctl(0, -2147195267, 0x2FF22160, 0x00000000) Err#19 ENODEV
---
> kioctl(0, -2147195266, 0x2FF22140, 0x00000000) Err#19 ENODEV
> kioctl(0, -2147195267, 0x2FF22140, 0x00000000) Err#19 ENODEV
212,213c214,215
< kioctl(0, -2147195266, 0x2FF22150, 0x00000000) Err#19 ENODEV
< kioctl(0, -2147195267, 0x2FF22150, 0x00000000) Err#19 ENODEV
---
> kioctl(0, -2147195266, 0x2FF22130, 0x00000000) Err#19 ENODEV
> kioctl(0, -2147195267, 0x2FF22130, 0x00000000) Err#19 ENODEV
216c218
< kwrite(1, 0x20035748, 0) Err#9 EBADF
---
> kwrite(1, 0x200357B8, 0) Err#9 EBADF

at this time expect doesn't hang

I can see some changes in open("/dev/null"), dup2() and close().


Konstantin
.

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