| Age | Commit message (Collapse) | Author |
|---|
|
The PSEUDO_STATBUF change (allowing operations on files over
2GB even on 32-bit systems) introduced a subtle bug; by calling
stat64() rather than real_stat(), pseudo stopped handling
chrooted paths well. In most cases, this was fine, but in the
specific case of a rename, where the stat buffers for the various
parts were actually used, it wasn't. Of particular note, pseudo
could end up creating links which had stack garbage for their
stat buffs, because it assumed that if the rename operation
succeeded, the stat operations must have succeeded.
Of course, there is no real_stat64 in the Linux port, because
there's no need for it; most code is calling __xstat64 or some
relative thereof, and even if you did really call stat64, it'd
end up routed there anyway. So we add that so that it can be
used for calls and we don't have to encode Linux-specific
magic about __xstat into the generic header.
|
|
ignored) rather than flags (where it was needed), meaning that the
open64 type functions didn't work as intended on 32-bit hosts.
|
|
Previously the clone(2) wrapper unconditionallity restored the system
environment. It also invokes the checks to see if the user has requested
pseudo to be disabled or unloaded. Due to the semantics of clone, this caused
both the parent and child processes to be disabled or unloaded.
The new code adds an intermediate function, wrap_clone_child, that only
runs within the child context. This way we can be sure to only disable/unload
pseudo from within the child process. In addition, we avoid mucking with
the environment if CLONE_VM is set, since this will affect both parent and
child.
Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
|
|
Change from internal PSEUDO_RELOADED to external PSEUDO_UNLOAD environment
variable. Enable external programs to have a safe and reliable way to unload
pseudo on the next exec*. PSEUDO_UNLOAD also will disable pseudo if we're in a
fork/clone situation in the same way PSEUDO_DISABLED=1 would.
Rename the PSEUDO_DISABLED tests, and create a similar set for the new
PSEUDO_UNLOAD.
Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
|
|
the 0100 bit for directories. The reason is that otherwise we create
plain files which are 0700 on disk, which means they're non-zero &0111,
which breaks euidaccess(X_OK).
|
|
|
|
|
|
|
|
This is a spiffied-up rebase of a bunch of intermediate changes, presented
as a whole because it is, surprisingly, less confusing that way. The basic
idea is to separate the guts code into categories ranging from generic
stuff that can be the same everywhere and specific variants. The big scary
one is the Darwin support, which actually seems to run okay on 64-bit OS X
10.6. (No other variants were tested.) The other example given is support
for the old clone() syscall on RHEL 4, which affects some wrlinux use cases.
There's a few minor cleanup bits here, such as a function with inconsistent
calling conventions, but nothing really exciting.
|
Peter Seebach
Mark Hatle
Seebs