Bug 14811

Created attachment 4868 [details]
Possible patch

Preconditions/Environment
-------------------------
Building a recipe which create files in a path that's a string prefix of one
of the build / packaging  directories.

Here is the offending recipe:
------
SUMMARY = "Powerboard support module"
LICENSE = "CLOSED"

inherit module

SRC_URI = "file://linux_module_4.1.0.tar.gz "
S = "${WORKDIR}/pkg"
----

where `linux_module_4.1.0.tar.gz` is a tarball
with the following structure:

pkg/Makefile
pkg/source1.c
pkg/source2.c
pkg/..

Triggering Action/Cause
-----------------------
bitbake kernel-module-powerboard

Expectation
-----------
The recipe should build correctly

Actual Result
-------------
We alternate between one of the following results:

-------------------
     0565:
File: '/home/fede/yocto/sources/poky/meta/lib/oe/sstatesig.py', lineno: 555, function: process
     0551:                    add_perm(stat.S_IXOTH, 'x')
     0552:
     0553:                if include_owners:
     0554:                    try:
 *** 0555:                        update_hash(" %10s" % pwd.getpwuid(s.st_uid).pw_name)
     0556:                        update_hash(" %10s" % grp.getgrgid(s.st_gid).gr_name)
     0557:                    except KeyError as e:
     0558:                        bb.warn("KeyError in %s" % path)
     0559:                        msg = ("KeyError: %s\nPath %s is owned by uid %d, gid %d, which doesn't match "
Exception: Exception: KeyError: 'getpwuid(): uid not found: 1000'
Path ./pkgdata/kernel-module-powerboard is owned by uid 1000, gid 1000, which doesn't match any user/group on target. This may be due to host contamination.
-------------------
or 
-------------------
File: '/usr/lib/python3.6/subprocess.py', lineno: 311, function: check_call
     0307:    if retcode:
     0308:        cmd = kwargs.get("args")
     0309:        if cmd is None:
     0310:            cmd = popenargs[0]
 *** 0311:        raise CalledProcessError(retcode, cmd)
     0312:    return 0
     0313:
     0314:
     0315:def check_output(*popenargs, timeout=None, **kwargs):
Exception: subprocess.CalledProcessError: Command '['rm', '-rf', '/home/fede/yocto/build-delta80t/tmp/work/delta80_vt-poky-linux-gnueabi/kernel-module-powerboard/1.0-r0/sstate-build-package/']' died with <Signals.SIGABRT: 6>.
-------------------

Reproducibility
---------------
always


Explanation
---------------
I've found that the code that process the ignore list in pseudo is incorrect. In this example
yocto run the packaging phase with PSEUDO_PATH_IGNORE=`pwd`/pkg plus other paths, `pkg` is inserted because it's the value of "${S}", but this way pseudo also ignore pkgdata causing the packaging process to run out of fakeroot and the errors above.

the culprit is the following function in pseudo:

int pseudo_client_ignore_path_chroot(const char *path, int ignore_chroot) {
 26         char *next = strchr(p, ',');
 27         if (next)
 28             *next++ = '\0';
 29 -       if (*p && !strncmp(path, p, strlen(p))) {
 30 -           pseudo_debug(PDBGF_PATH | PDBGF_VERBOSE, "ignoring path: '%s'\n", path);
 31 -           ret = 1;
 32 -           break;

the strcmp() matches both /pkg and /pkgdata

I've attacched a possible fix as a patch.