Re: libzstd :: non-regular file test failure

[Samuel Thibault]

Diego Nieto Cid, le mar. 03 déc. 2024 18:11:17 -0300, a ecrit:
> El mar, 3 dic 2024 a las 17:15, Samuel Thibault
> (<samuel.thibault@gnu.org>) escribió:
> >
> > Oh, that's odd indeed. Perhaps run it through rpctrace to see what
> > happens behind.
> >
> 
> I attached the rpctrace log. I'm not sure what to look for but the
> following lines seem relevant:
> 
>     7<--38(pid1044)->dir_lookup ("dev/zero" 65554 436) = 0 1 ""
> 52<--47(pid1044)
>     52<--47(pid1044)->file_set_size (0) = 0
>     52<--47(pid1044)->file_utimens ({0 0 0 0 0 0 0 0 -2 -1 -1 -1 -1 -1
> -1 -1} {0 0 0 0 0 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1}) = 0x40000001
> (Operation not permitted)
>     52<--47(pid1044)->term_getctty () = 0xfffffed1 ((ipc/mig) bad
> request message ID)
>     52<--47(pid1044)->io_stat_request () = 0 {15 0 0 0 0 0 0 0 -67 2 0
> 0 0 0 0 0 97 -74 1 0 0 0 0 0 -83 -90 55 103 0 0 0 0 0 0 0 0 0 0 0 0
> -74 33 -128 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 -1 -1
> -1 -1 127 -77 124 55 103 0 0 0 0 0 0 0 0 0 0 0 0 -77 124 55 103 0 0 0
> 0 0 0 0 0 0 0 0 0 -77 124 55 103 0 0 0 0 0 0 0 0 0 0 0 0 0 32 0 0 0 0
> 0 0 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> -80 36 3 40 0 0 0 0 -8 6 0 0 0 0 0 0}
>     52<--47(pid1044)->term_getctty () = 0xfffffed1 ((ipc/mig) bad
> request message ID)
>     52<--47(pid1044)->io_write_request ("Hello World!\n" -1) = 0 15
>   task15(pid1044)->mach_port_deallocate (pn{ 17}) = 0

And nothing else after that? fclose() would need to be run inside gdb to
make sure where exactly it returns an error. Possibly it's simply
_IO_do_flush that doesn't work for /dev/zero, but this doesn't show up
in the RPCs above.

Samuel