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Sometimes (e.g. in lzxpress Huffman encoding, and in some of our
tests: c.f. https://lists.samba.org/archive/samba-technical/2018-March/126010.html)
we want a stable sort algorithm (meaning one that retains the previous
order of items that compare equal).
The GNU libc qsort() is *usually* stable, in that it first tries to
use a mergesort but reverts to quicksort if the necessary allocations
fail. That has led Samba developers to unthinkingly assume qsort() is
stable which is not the case on many platforms, and might not always
be on GNU/Linuxes either.
This adds four functions. stable_sort() sorts an array, and requires
an auxiliary working array of the same size. stable_sort_talloc()
takes a talloc context so it ca create a working array and call
stable_sort(). stable_sort_r() takes an opaque context blob that gets
passed to the compare function, like qsort_r() and ldb_qsort(). And
stable_sort_talloc_r() rounds out the quadrant.
These are LGPL so that the can be used in ldb, which has problems with
unstable sort.
The tests are borrowed and extended from test_ldb_qsort.c.
When sorting non-trivial structs this is roughly as fast as GNU qsort,
but GNU qsort has optimisations for small items, using direct
assignments of rather than memcpy where the size allows the item to be
cast as some kind of int.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
We need "struct iovec", which comes in via sys/uio.h, incuded by
system/filesys.h
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Panic if memset_s() fails.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Checking for presence of both netgroup and innetgr. INNETGR is not
defined on libc's such as musl so not checking results in a build error.
Signed-off-by: listout <brahmajit.xyz@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Mon Aug 8 07:28:31 UTC 2022 on sn-devel-184
In this case it is probably better to crash out.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15103
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
This avoids wasting getpid() calls in a lot of places...
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sun Jul 24 00:25:49 UTC 2022 on sn-devel-184
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15073
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Tue Jul 19 12:17:35 UTC 2022 on sn-devel-184
The executables generated from lib/util/tests/test_logging.c are used
by the samba.tests.logfiles tests to test logging with various
smb.confs that assign classes to various files at different levels
etc.
Previously test_logging.c had its own version of the table; now it
shares one with debug.c
We put the table in a sub-directory (lib/util/debug-classes/), because
adding local_include=True to the wscript_build stanza causes the
compiler confusion between <time.h> and lib/util/time.h.
Note: there are still two other lists of the class names, in
python/samba/tests/logfiles.py and
docs-xml/smbdotconf/logging/loglevel.xml.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This can be a useful macro when you are trying to track the behaviour
of one process out of the dozens that samba starts up, and when your
interest is in following it over time, not necessarily in a single
stack.
In DEVELOPER mode, if you call 'debug_developer_enable()' in the
process you're following, then any instances of DBG_DEV() will work
like DBG_ERR(), also adding ":DEV:12345:" where "12345" is the pid of
th current process.
Within debug.c itself, the macro always writes to stderr, because the
debug.c functions are not all reentrant.
When not in DEVELOPER MODE, the macro evaluates to nothing.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
There is one knownfail, where it seems an smb.conf like
log file = foo
log level = 2 tdb:2@baa ldb:3
will send the ldb logs to 'baa' instead of 'foo' (i.e., the last
opened log file, rather than the default log file).
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
The 'log level' line in smb.conf allows messages from different log
classes to be sent to different places, but we have not tested that
this works. Now we do, somewhat.
The test involves running a special binary based on a stripped down
source4/samba/server.c that just starts up, parses the command line
and a given smb.conf, then logs messages from multiple classes and
exits.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
CTDB doesn't want this redirection of stderr to the log file. It
expects to be able to capture stderr of subprocesses and log them with
a header. This redirection stops that from happening.
Unfortunately this has to be a negative option (i.e. "no" in the name)
so that the default of 0/false maintains existing behaviour.
Note that the default behaviour is sub-optimal because it causes raw
data (i.e. debug data without a header) to appear in the log.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15090
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
gnutls_memcmp() is mostly identical to our own implementation, except
that ours will not break if supplied with 4 GiB or more of data.
However, using an external function permits us to disclaim
responsibility if some CPU/compiler combination happens to invalidate
our constant-time guarantee.
For reference, gnutls_memcmp() implementation:
78d9820de0/lib/safe-memfuncs.c (L41-67)
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Ensure that it gives the correct results for comparing two memory
regions.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Ensure that it gives the correct results for comparing two data blobs.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Since memcmp_const_time() doesn't act as an exact replacement for
memcmp(), and its return value is only ever compared with zero, simplify
it and emphasize the intention of checking equality by returning a bool
instead.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Since data_blob_cmp_const_time() doesn't act as an exact replacement for
data_blob_cmp(), and its return value is only ever compared with zero,
simplify it and emphasize the intention of checking equality by
returning a bool instead.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This helps to avoid timing attacks.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15010
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This allows it to be used in more places without needing to introduce
more dependencies.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Backtraces when Samba is in PANIC state are better with
backtrace_symbols() than with libunwind on Ubuntu 20.04 x86_64
so move libunwind to a off-by-default option, prompted for
if backtrace_symbols() is not available.
Based on a request by Fco Javier Felix <ffelix@inode64.com>
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
We look for backtrace_symbols() in this library, so we should link against
it if we find it.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Previously this would leave static functions unused, which the compiler will
not allow for a developer build.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
This partly reverts commit 620de975f1.
Drop chunk including system/nis.h, drop wscript_build modifications,
use getdomainname() from glibc instead of yp_get_default_domain() from
libnsl.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15087
Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15069
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Christof Schmitt <cs@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Fri Jun 3 21:53:31 UTC 2022 on sn-devel-184
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Mon May 30 11:03:47 UTC 2022 on sn-devel-184
This just prints a warning for:
ms_fnmatch.c:95:51: error: array subscript 0 is outside array bounds of
‘struct max_n[0]’ [-Werror=array-bounds]
95 | if (max_n != NULL && max_n->predot &&
|
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
As part of the filename_convert() process, keep a pathref dirfsp of
the containing directory for later use. This avoids having to do
another non_widelink_open() on every SMB2_CREATE and ntcreate&x in
later patches.
Future work will be to go through other filename_convert() calls and
make them use filename_convert_dirfsp(). If we manage to convert all
of them except the one in filename_convert_dirfsp() itself, we can
simplify filename_convert() and unix_convert() significantly.
Too large a patch, but I don't know how to split this up into smaller
logic pieces.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>