Roland McGrath <[EMAIL PROTECTED]> writes: > [...] As to the SIGLOST crash, that is kind of strange. That error > is supposed to indicate that the RPC server appeared to die, in this > case the storeio or filesystem.
Storeio keeps running, but ... > First you can try "trap '' SIGLOST" to ignore the signal [...] ... `mkfs.ufs' tells me about a `(ipc/send) invalid destination port', when SIGLOST is trapped. I have looked into __libc_lseek(), which is called from rdfs() in mkfs.c. The interesting part of this quite short function is the macro HURD_DPORT_USE that expands to about 40 lines. In one of the first lines a hurd_critical_section is being entered, then the program steps into an `else' path with the following commands: ,------------------------------------------------------------------- | ctty = _hurd_port_get (&__d->ctty, &__ctty_ulink ); | port = _hurd_port_locked_get (&__d->port, &__ulink); /* port.h */ | | _hurd_critical_section_unlock (crit); | __result = ((__io_seek (port, offset, whence, &offset))); | _hurd_port_free (&__d-> port, &__ulink, port); | | if (ctty != MACH_PORT_NULL) | _hurd_port_free (&__d-> ctty, &__ctty_ulink, ctty); `------------------------------------------------------------------- In __io_seek(), which is implemented in glibc/hurd/RPC_io_seek.c, there's a __mach_msg() call, that returns EMACH_SEND_INVALID_DEST, if mkfs.ufs is run as root, otherwise `success'; __io_seek() then returns with this value, so that __result (above, in lseek.c) contains EMACH_... Finally hurd_dfail() will be called and the SIGLOST signal be raised. The input of __mach_msg(), i.e. Mess.In, looks ok in both (root and non-root) cases (local and remote port numbers differ slightly). Maybe in _hurd_port_locked_get() something happens, that makes the port invalid. I don't know wheather this strange behaviour applies to other Hurd systems too. My system contains Debian packages of: Hurd (Nov 5), Gnumach (Oct 13) and glibc[-dbg]_2.2.4-3 (Oct 11). Perhaps you could test whether `mkfs.ufs' fails for `root' on your system too, with running dd if=/dev/zero of=./testfs bs=1024 count=1024 mkfs.ufs --track=1 --sectors=63 ./testfs Michael _______________________________________________ Bug-hurd mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/bug-hurd
