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realloc can return NULL in one of two cases - (1) the realloc failed,
(2) realloc succeeded but the new size requested was zero, in which
case this is identical to a free() call.
The error paths dealing with these two cases should be different,
but mostly weren't. Secondly the standard idiom for dealing with
realloc when you know the new size is non-zero is the following :
tmp = realloc(p, size);
if (!tmp) {
SAFE_FREE(p);
return error;
} else {
p = tmp;
}
However, there were *many* *many* places in Samba where we were
using the old (broken) idiom of :
p = realloc(p, size)
if (!p) {
return error;
}
which will leak the memory pointed to by p on realloc fail.
This commit (hopefully) fixes all these cases by moving to
a standard idiom of :
p = SMB_REALLOC(p, size)
if (!p) {
return error;
}
Where if the realloc returns null due to the realloc failing
or size == 0 we *guarentee* that the storage pointed to by p
has been freed. This allows me to remove a lot of code that
was dealing with the standard (more verbose) method that required
a tmp pointer. This is almost always what you want. When a
realloc fails you never usually want the old memory, you
want to free it and get into your error processing asap.
For the 11 remaining cases where we really do need to keep the
old pointer I have invented the new macro SMB_REALLOC_KEEP_OLD_ON_ERROR,
which can be used as follows :
tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
if (!tmp) {
SAFE_FREE(p);
return error;
} else {
p = tmp;
}
SMB_REALLOC_KEEP_OLD_ON_ERROR guarentees never to free the
pointer p, even on size == 0 or realloc fail. All this is
done by a hidden extra argument to Realloc(), BOOL free_old_on_error
which is set appropriately by the SMB_REALLOC and SMB_REALLOC_KEEP_OLD_ON_ERROR
macros (and their array counterparts).
It remains to be seen what this will do to our Coverity bug count :-).
Jeremy.
* Finish prototype of the "add port command" implementation
Format is "addportcommand portname deviceURI"
* DeviceURI is either
- socket://hostname:port/
- lpr://hostname/queue
depending on what the client sent in the request
Began the poet, his face as pale as death.
"I will go first, and you will follow me."
---
Adding XcvDataPort() to the spoolss code for remotely
add ports. The design is to allow an intuitive means
of creating a new CUPS print queue from the Windows 2000/XP
APW without hacks like specifying the deviceURI in the
location field of the printer properties dialog.
Also set 'default devmode = yes' as the new default
since it causes no harm and only is executed when you
have a NULL devmode anyways.
code relied upon file permissions alone. Now we check that
the user is a printer administrator and that the share has not been
marked read only for that user.
by saving the UNIX token used to set a delete on close flag,
and using it when doing the delete. libsmbsharemodes.so still
needs updating to cope with this change.
Samba4 torture tests to follow.
Jeremy.
box with gcc4 and -O6...
Fix a bunch of C99 dereferencing type-punned pointer will break
strict-aliasing rules errors. Also added prs_int32 (not uint32...)
as it's needed in one place. Find places where prs_uint32 was being
used to marshall/unmarshall a time_t (a big no no on 64-bits).
More warning fixes to come.
Thanks to Volker for nudging me to compile like this.
Jeremy.
spoolss backchannel connection by rewriting
spoolss_connect_to_client(). Ensure that we
save the cli_state* in the rpc_pipe_client struct.
* fix typo in debug message in cli_start_connection"
* \PIPE\unixinfo
* winbindd's {group,alias}membership new functions
* winbindd's lookupsids() functionality
* swat (trunk changes to be reverted as per discussion with Deryck)
the new talloc() features:
Note that the REGSUB_CTR and REGVAL_CTR objects *must* be talloc()'d
since the methods use the object pointer as the talloc context for
internal private data.
There is no longer a regXXX_ctr_intit() and regXXX_ctr_destroy()
pair of functions. Simply TALLOC_ZERO_P() and TALLOC_FREE() the
object.
Also had to convert the printer_info_2->NT_PRINTER_DATA field
to be talloc()'d as well. This is just a stop on the road to
cleaning up the printer memory management.
for NT4 clients enumerating printer data on slow CPUs)
* fix pinter and secdesc record upgrade to normalize the key
(rev'd printer tdb version)
* fixed problem that was normalizing the printername name field
in general, this should fix the issues upgrading print servers
from 3.0.14a to 3.0.20
when packing values. It is a compatible change though and will
not require a tdb version upgrade
* Can successfully create new printer subkeys via winreg that
are immediately available via spoolss calls. Still cannot delete
keys yet though. That comes next.
printmig.exe assumes that the LUID of the SeBackupPrivlege
on the target server matches the LUID of the privilege
on the local client. Even though an LUID is never guaranteed
to be the same across reboots. How *awful*! My cat could
write better code! (more on my cat later....)
* Set the privelege LUID in the global PRIVS[] array
* Rename RegCreateKey() to RegCreateKeyEx() to better match MSDN
* Rename the unknown field in RegCreateKeyEx() to disposition
(guess according to MSDN)
* Add the capability to define REG_TDB_ONLY for using the reg_db.c
functions and stress the RegXXX() rpc functions.
