Cygwin 3.5.1: unable to open output file '/cygdrive/t/tmpdir/x-01564d.o': 'Operation not permitted'

Cygwin 3.5.1: unable to open output file '/cygdrive/t/tmpdir/x-01564d.o': 'Operation not permitted'

[Dan Shelton]

Hello!

I've run into a problem with clang on Cygwin 3.5.1 and 3.6. My machine
does not have much disk space left, so I switched TMPDIR to the
network drive. But clang then failed, like this:

$ cat x.c
#include <stdio.h>
int main(int ac, char *av[]) { puts("hello world"); return 0 ; }
$ mkdir /cygdrive/t/tmpdir
$ TMPDIR=/cygdrive/t/tmpdir clang x.c
error: unable to open output file '/cygdrive/t/tmpdir/x-01564d.o':
      'Operation not permitted'
1 error generated.

/cygdrive/t/tmpdir/ is a clean dir.
/usr/bin/touch /cygdrive/t/tmpdir/dummy works without problems

How can I debug this further?

Dan
-- 
Dan Shelton - Cluster Specialist Win/Lin/Bsd

Re: Cygwin 3.5.1: unable to open output file '/cygdrive/t/tmpdir/x-01564d.o': 'Operation not permitted'

[Cedric Blancher]

On Fri, 8 Mar 2024 at 03:25, Dan Shelton via Cygwin <cygwin@cygwin.com> wrote:
>
> Hello!
>
> I've run into a problem with clang on Cygwin 3.5.1 and 3.6. My machine
> does not have much disk space left, so I switched TMPDIR to the
> network drive. But clang then failed, like this:
>
> $ cat x.c
> #include <stdio.h>
> int main(int ac, char *av[]) { puts("hello world"); return 0 ; }
> $ mkdir /cygdrive/t/tmpdir
> $ TMPDIR=/cygdrive/t/tmpdir clang x.c
> error: unable to open output file '/cygdrive/t/tmpdir/x-01564d.o':
>       'Operation not permitted'
> 1 error generated.
>
> /cygdrive/t/tmpdir/ is a clean dir.
> /usr/bin/touch /cygdrive/t/tmpdir/dummy works without problems
>
> How can I debug this further?
>

Which "network drive" do you use? SMB, AFS, Microsoft NFSv3,
msnfs41client NFSv4.1, OpenText Exceed NFSv3/NFSv4?

Ced
-- 
Cedric Blancher <cedric.blancher@gmail.com>
[https://plus.google.com/u/0/+CedricBlancher/]
Institute Pasteur

Re: Cygwin 3.5.1: unable to open output file '/cygdrive/t/tmpdir/x-01564d.o': 'Operation not permitted'

[Dan Shelton]

On Fri, 8 Mar 2024 at 08:32, Cedric Blancher via Cygwin
<cygwin@cygwin.com> wrote:
>
> On Fri, 8 Mar 2024 at 03:25, Dan Shelton via Cygwin <cygwin@cygwin.com> wrote:
> >
> > Hello!
> >
> > I've run into a problem with clang on Cygwin 3.5.1 and 3.6. My machine
> > does not have much disk space left, so I switched TMPDIR to the
> > network drive. But clang then failed, like this:
> >
> > $ cat x.c
> > #include <stdio.h>
> > int main(int ac, char *av[]) { puts("hello world"); return 0 ; }
> > $ mkdir /cygdrive/t/tmpdir
> > $ TMPDIR=/cygdrive/t/tmpdir clang x.c
> > error: unable to open output file '/cygdrive/t/tmpdir/x-01564d.o':
> >       'Operation not permitted'
> > 1 error generated.
> >
> > /cygdrive/t/tmpdir/ is a clean dir.
> > /usr/bin/touch /cygdrive/t/tmpdir/dummy works without problems
> >
> > How can I debug this further?
> >
>
> Which "network drive" do you use? SMB, AFS, Microsoft NFSv3,
> msnfs41client NFSv4.1, OpenText Exceed NFSv3/NFSv4?
>

I've installed https://sourceforge.net/p/ms-nfs41-client/mailman/message/58741244/

Dan
-- 
Dan Shelton - Cluster Specialist Win/Lin/Bsd

Re: Cygwin 3.5.1: unable to open output file '/cygdrive/t/tmpdir/x-01564d.o': 'Operation not permitted'

[Cedric Blancher]

On Fri, 8 Mar 2024 at 03:25, Dan Shelton via Cygwin <cygwin@cygwin.com> wrote:
>
> Hello!
>
> I've run into a problem with clang on Cygwin 3.5.1 and 3.6. My machine
> does not have much disk space left, so I switched TMPDIR to the
> network drive. But clang then failed, like this:
>
> $ cat x.c
> #include <stdio.h>
> int main(int ac, char *av[]) { puts("hello world"); return 0 ; }
> $ mkdir /cygdrive/t/tmpdir
> $ TMPDIR=/cygdrive/t/tmpdir clang x.c
> error: unable to open output file '/cygdrive/t/tmpdir/x-01564d.o':
>       'Operation not permitted'
> 1 error generated.
>
> /cygdrive/t/tmpdir/ is a clean dir.
> /usr/bin/touch /cygdrive/t/tmpdir/dummy works without problems

I can confirm the bug, but only for the clang version linked to
Cygwin. clang version of MinGW does not show that error, so this looks
like a Cygwin bug.

Ced
-- 
Cedric Blancher <cedric.blancher@gmail.com>
[https://plus.google.com/u/0/+CedricBlancher/]
Institute Pasteur

Re: Cygwin 3.5.1: unable to open output file '/cygdrive/t/tmpdir/x-01564d.o': 'Operation not permitted'

[Roland Mainz]

On Mon, Mar 11, 2024 at 8:01 AM Cedric Blancher via Cygwin
<cygwin@cygwin.com> wrote:
> On Fri, 8 Mar 2024 at 03:25, Dan Shelton via Cygwin <cygwin@cygwin.com> wrote:
> > I've run into a problem with clang on Cygwin 3.5.1 and 3.6. My machine
> > does not have much disk space left, so I switched TMPDIR to the
> > network drive. But clang then failed, like this:
> >
> > $ cat x.c
> > #include <stdio.h>
> > int main(int ac, char *av[]) { puts("hello world"); return 0 ; }
> > $ mkdir /cygdrive/t/tmpdir
> > $ TMPDIR=/cygdrive/t/tmpdir clang x.c
> > error: unable to open output file '/cygdrive/t/tmpdir/x-01564d.o':
> >       'Operation not permitted'
> > 1 error generated.
> >
> > /cygdrive/t/tmpdir/ is a clean dir.
> > /usr/bin/touch /cygdrive/t/tmpdir/dummy works without problems
>
> I can confirm the bug, but only for the clang version linked to
> Cygwin. clang version of MinGW does not show that error, so this looks
> like a Cygwin bug.

I can reproduce the bug on Cygwin "CYGWIN_NT-10.0-19045
3.6.0-0.73.gc2310061c66a.x86_64":
---- snip ----
$ cat x.c
#include <stdio.h>
int main(int ac, char *av[]) { puts("hello world"); return 0 ; }

$ TMPDIR=/cygdrive/t/tmpdir/ strace -o clang_tmpdir_on_nfs41fs.log
"C:\cygwin64\bin\clang-8.exe" x.c
error: unable to open output file '/cygdrive/t/tmpdir/x-8cb6f7.o':
'Operation not permitted'
1 error generated.
---- snip ----

Full strace log is at https://nrubsig.kpaste.net/ff6248c25 (I use the
line numbers from that site below).

It seems starting with line 2949 this goes wrong:
---- snip ----
  505 5069822 [main] clang-8 40295 symlink_info::check: 0x0 =
NtCreateFile (\??\T:\tmpdir\x-8cb6f7.o)
 3645 5073467 [main] clang-8 40295 symlink_info::check: not a symlink
  266 5073733 [main] clang-8 40295 symlink_info::check: 0 =
symlink.check(T:\tmpdir\x-8cb6f7.o, 0x7FFFF96E0) (mount_flags 0x4020,
path_flags 0x0)
  310 5074043 [main] clang-8 40295 path_conv::check:
this->path(T:\tmpdir\x-8cb6f7.o), has_acls(1)
  305 5074348 [main] clang-8 40295 build_fh_pc: fh 0x800027A30, dev 000000C3
 1441 5075789 [main] clang-8 40295 __set_errno: int
check_access(security_descriptor&, GENERIC_MAPPING&, ACCESS_MASK, int,
bool):600 setting errno 13
  257 5076046 [main] clang-8 40295 check_file_access: flags 0x2, ret -1
---- snip ----

So |build_fh_pc()| somehow fails with error 13... but I don't understand why...

And then there is this weird ACL:
---- snip -----
$ ls -l /cygdrive/t/tmpdir/x-8cb6f7.o
-rw------- 1 Unix_User+197608 Unix_Group+197121 0 Mar 11 11:00
/cygdrive/t/tmpdir/x-8cb6f7.o
$ getfacl /cygdrive/t/tmpdir/x-8cb6f7.o
# file: /cygdrive/t/tmpdir/x-8cb6f7.o
# owner: Unix_User+197608
# group: Unix_Group+197121
user::---
group::---
other::---
---- snip ----

/usr/bin/file, echo&&/&/usr/bin/cat can read/write that file
---- snip ----
$ file /cygdrive/t/tmpdir/x-8cb6f7.o
/cygdrive/t/tmpdir/x-8cb6f7.o: empty
$ echo "foo" >>/cygdrive/t/tmpdir/x-8cb6f7.o
$ cat /cygdrive/t/tmpdir/x-8cb6f7.o
foo
---- snip ----

I have no idea why clang fails in this case... I need help with this one...

----

Bye,
Roland
-- 
  __ .  . __
 (o.\ \/ /.o) roland.mainz@nrubsig.org
  \__\/\/__/  MPEG specialist, C&&JAVA&&Sun&&Unix programmer
  /O /==\ O\  TEL +49 641 3992797
 (;O/ \/ \O;)

Re: Cygwin 3.5.1: unable to open output file '/cygdrive/t/tmpdir/x-01564d.o': 'Operation not permitted'

[Brian Inglis]

On 2024-03-11 04:27, Roland Mainz via Cygwin wrote:
> On Mon, Mar 11, 2024 at 8:01 AM Cedric Blancher via Cygwin
> <cygwin@cygwin.com> wrote:
>> On Fri, 8 Mar 2024 at 03:25, Dan Shelton via Cygwin <cygwin@cygwin.com> wrote:
>>> I've run into a problem with clang on Cygwin 3.5.1 and 3.6. My machine
>>> does not have much disk space left, so I switched TMPDIR to the
>>> network drive. But clang then failed, like this:
>>>
>>> $ cat x.c
>>> #include <stdio.h>
>>> int main(int ac, char *av[]) { puts("hello world"); return 0 ; }
>>> $ mkdir /cygdrive/t/tmpdir
>>> $ TMPDIR=/cygdrive/t/tmpdir clang x.c
>>> error: unable to open output file '/cygdrive/t/tmpdir/x-01564d.o':
>>>        'Operation not permitted'
>>> 1 error generated.
>>>
>>> /cygdrive/t/tmpdir/ is a clean dir.
>>> /usr/bin/touch /cygdrive/t/tmpdir/dummy works without problems
>>
>> I can confirm the bug, but only for the clang version linked to
>> Cygwin. clang version of MinGW does not show that error, so this looks
>> like a Cygwin bug.
> 
> I can reproduce the bug on Cygwin "CYGWIN_NT-10.0-19045
> 3.6.0-0.73.gc2310061c66a.x86_64":
> ---- snip ----
> $ cat x.c
> #include <stdio.h>
> int main(int ac, char *av[]) { puts("hello world"); return 0 ; }
> 
> $ TMPDIR=/cygdrive/t/tmpdir/ strace -o clang_tmpdir_on_nfs41fs.log
> "C:\cygwin64\bin\clang-8.exe" x.c
> error: unable to open output file '/cygdrive/t/tmpdir/x-8cb6f7.o':
> 'Operation not permitted'
> 1 error generated.
> ---- snip ----
> 
> Full strace log is at https://nrubsig.kpaste.net/ff6248c25 (I use the
> line numbers from that site below).
> 
> It seems starting with line 2949 this goes wrong:
> ---- snip ----
>    505 5069822 [main] clang-8 40295 symlink_info::check: 0x0 =
> NtCreateFile (\??\T:\tmpdir\x-8cb6f7.o)
>   3645 5073467 [main] clang-8 40295 symlink_info::check: not a symlink
>    266 5073733 [main] clang-8 40295 symlink_info::check: 0 =
> symlink.check(T:\tmpdir\x-8cb6f7.o, 0x7FFFF96E0) (mount_flags 0x4020,
> path_flags 0x0)
>    310 5074043 [main] clang-8 40295 path_conv::check:
> this->path(T:\tmpdir\x-8cb6f7.o), has_acls(1)
>    305 5074348 [main] clang-8 40295 build_fh_pc: fh 0x800027A30, dev 000000C3
>   1441 5075789 [main] clang-8 40295 __set_errno: int
> check_access(security_descriptor&, GENERIC_MAPPING&, ACCESS_MASK, int,
> bool):600 setting errno 13
>    257 5076046 [main] clang-8 40295 check_file_access: flags 0x2, ret -1
> ---- snip ----
> 
> So |build_fh_pc()| somehow fails with error 13... but I don't understand why...
> 
> And then there is this weird ACL:
> ---- snip -----
> $ ls -l /cygdrive/t/tmpdir/x-8cb6f7.o
> -rw------- 1 Unix_User+197608 Unix_Group+197121 0 Mar 11 11:00
> /cygdrive/t/tmpdir/x-8cb6f7.o
> $ getfacl /cygdrive/t/tmpdir/x-8cb6f7.o
> # file: /cygdrive/t/tmpdir/x-8cb6f7.o
> # owner: Unix_User+197608
> # group: Unix_Group+197121
> user::---
> group::---
> other::---
> ---- snip ----
> 
> /usr/bin/file, echo&&/&/usr/bin/cat can read/write that file
> ---- snip ----
> $ file /cygdrive/t/tmpdir/x-8cb6f7.o
> /cygdrive/t/tmpdir/x-8cb6f7.o: empty
> $ echo "foo" >>/cygdrive/t/tmpdir/x-8cb6f7.o
> $ cat /cygdrive/t/tmpdir/x-8cb6f7.o
> foo
> ---- snip ----
> 
> I have no idea why clang fails in this case... I need help with this one...

For normal temp space behaviour under Cygwin, I found you have to:

chmod   -c a+rwxt 					   /cygdrive/t/tmpdir/
setfacl -m u::rwx,g::rwx,o::rwx,d:u::rwx,d:g::rwx,d:o::rwx /cygdrive/t/tmpdir/

to set the DACLs to rwx and avoid any problems.

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
                                 -- Antoine de Saint-Exupéry

Re: Cygwin 3.5.1: unable to open output file '/cygdrive/t/tmpdir/x-01564d.o': 'Operation not permitted'

[Dan Shelton]

On Mon, 11 Mar 2024 at 17:59, Brian Inglis via Cygwin <cygwin@cygwin.com> wrote:
>
> On 2024-03-11 04:27, Roland Mainz via Cygwin wrote:
> > On Mon, Mar 11, 2024 at 8:01 AM Cedric Blancher via Cygwin
> > <cygwin@cygwin.com> wrote:
> >> On Fri, 8 Mar 2024 at 03:25, Dan Shelton via Cygwin <cygwin@cygwin.com> wrote:
> >>> I've run into a problem with clang on Cygwin 3.5.1 and 3.6. My machine
> >>> does not have much disk space left, so I switched TMPDIR to the
> >>> network drive. But clang then failed, like this:
> >>>
> >>> $ cat x.c
> >>> #include <stdio.h>
> >>> int main(int ac, char *av[]) { puts("hello world"); return 0 ; }
> >>> $ mkdir /cygdrive/t/tmpdir
> >>> $ TMPDIR=/cygdrive/t/tmpdir clang x.c
> >>> error: unable to open output file '/cygdrive/t/tmpdir/x-01564d.o':
> >>>        'Operation not permitted'
> >>> 1 error generated.
> >>>
> >>> /cygdrive/t/tmpdir/ is a clean dir.
> >>> /usr/bin/touch /cygdrive/t/tmpdir/dummy works without problems
> >>
> >> I can confirm the bug, but only for the clang version linked to
> >> Cygwin. clang version of MinGW does not show that error, so this looks
> >> like a Cygwin bug.
> >
> > I can reproduce the bug on Cygwin "CYGWIN_NT-10.0-19045
> > 3.6.0-0.73.gc2310061c66a.x86_64":
> > ---- snip ----
> > $ cat x.c
> > #include <stdio.h>
> > int main(int ac, char *av[]) { puts("hello world"); return 0 ; }
> >
> > $ TMPDIR=/cygdrive/t/tmpdir/ strace -o clang_tmpdir_on_nfs41fs.log
> > "C:\cygwin64\bin\clang-8.exe" x.c
> > error: unable to open output file '/cygdrive/t/tmpdir/x-8cb6f7.o':
> > 'Operation not permitted'
> > 1 error generated.
> > ---- snip ----
> >
> > Full strace log is at https://nrubsig.kpaste.net/ff6248c25 (I use the
> > line numbers from that site below).
> >
> > It seems starting with line 2949 this goes wrong:
> > ---- snip ----
> >    505 5069822 [main] clang-8 40295 symlink_info::check: 0x0 =
> > NtCreateFile (\??\T:\tmpdir\x-8cb6f7.o)
> >   3645 5073467 [main] clang-8 40295 symlink_info::check: not a symlink
> >    266 5073733 [main] clang-8 40295 symlink_info::check: 0 =
> > symlink.check(T:\tmpdir\x-8cb6f7.o, 0x7FFFF96E0) (mount_flags 0x4020,
> > path_flags 0x0)
> >    310 5074043 [main] clang-8 40295 path_conv::check:
> > this->path(T:\tmpdir\x-8cb6f7.o), has_acls(1)
> >    305 5074348 [main] clang-8 40295 build_fh_pc: fh 0x800027A30, dev 000000C3
> >   1441 5075789 [main] clang-8 40295 __set_errno: int
> > check_access(security_descriptor&, GENERIC_MAPPING&, ACCESS_MASK, int,
> > bool):600 setting errno 13
> >    257 5076046 [main] clang-8 40295 check_file_access: flags 0x2, ret -1
> > ---- snip ----
> >
> > So |build_fh_pc()| somehow fails with error 13... but I don't understand why...
> >
> > And then there is this weird ACL:
> > ---- snip -----
> > $ ls -l /cygdrive/t/tmpdir/x-8cb6f7.o
> > -rw------- 1 Unix_User+197608 Unix_Group+197121 0 Mar 11 11:00
> > /cygdrive/t/tmpdir/x-8cb6f7.o
> > $ getfacl /cygdrive/t/tmpdir/x-8cb6f7.o
> > # file: /cygdrive/t/tmpdir/x-8cb6f7.o
> > # owner: Unix_User+197608
> > # group: Unix_Group+197121
> > user::---
> > group::---
> > other::---
> > ---- snip ----
> >
> > /usr/bin/file, echo&&/&/usr/bin/cat can read/write that file
> > ---- snip ----
> > $ file /cygdrive/t/tmpdir/x-8cb6f7.o
> > /cygdrive/t/tmpdir/x-8cb6f7.o: empty
> > $ echo "foo" >>/cygdrive/t/tmpdir/x-8cb6f7.o
> > $ cat /cygdrive/t/tmpdir/x-8cb6f7.o
> > foo
> > ---- snip ----
> >
> > I have no idea why clang fails in this case... I need help with this one...
>
> For normal temp space behaviour under Cygwin, I found you have to:
>
> chmod   -c a+rwxt                                          /cygdrive/t/tmpdir/
> setfacl -m u::rwx,g::rwx,o::rwx,d:u::rwx,d:g::rwx,d:o::rwx /cygdrive/t/tmpdir/
>
> to set the DACLs to rwx and avoid any problems.

That does not work either.

Dan
-- 
Dan Shelton - Cluster Specialist Win/Lin/Bsd