livecd-creator + selinux
Daniel J Walsh
dwalsh at redhat.com
Fri May 16 11:56:24 UTC 2008
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Eric Paris wrote:
| On Thu, 2008-05-15 at 16:47 -0400, Stephen Smalley wrote:
|> On Thu, 2008-05-15 at 16:33 -0400, Eric Paris wrote:
|>> #4 At the end of the rpm transaction when everything is installed it
|>> calls restorecon and I get one for (I assume) every file almost all of
|>> which look like:
|>>
|>> /sbin/restorecon reset /srv context
system_u:object_r:var_t:s0->system_u:object_r:var_t:s0
|>>
|>> Notice nothing changed? Again I assume its my hack of a /selinux which
|>> causes it and I'll try to run down why, but maybe someone else sees that
|>> quickly.
|> That suggests it is being called with the -f (force) flag from
|> e.g. /sbin/fixfiles. selinux-policy.spec does a
|> fixfiles -C file_contexts.pre restore
|>
|> fixfiles -C does a diff between the old and new file contexts
|> configurations and applies restorecon to the result. There is some
|> serious magic in there, and it is all Dan's fault ;)
|
| ok, in the livecd-creator kickstart.py I see
|
| if os.path.exists(self.path("/sbin/restorecon")):
| self.call(["/sbin/restorecon", "-l", "-v", "-r", "-F",
"-e", "/proc", "-e", "/sys", "-e", "/dev", "-e", "/selinux", "/"])
|
| So there is our -F. Is there a way to get it to fix "user" without
| getting it to fix "things that aren't wrong"
|
| -Eric
|
Remove the -v
Although this looks wrong and makes no sense in restorecon/setfiles.
/*
* Do not relabel the file if the matching specification is
* <<none>> or the file is already labeled according to the
* specification.
*/
if ((strcmp(newcon, "<<none>>") == 0) ||
(context && (strcmp(context, newcon) == 0) && !force)) {
freecon(context);
goto out;
}
The !force check should be removed. It makes no send to relabel in the
case of the context being the same or the context being none.
Should be
/*
* Do not relabel the file if the matching specification is
* <<none>> or the file is already labeled according to the
* specification.
*/
if ((strcmp(newcon, "<<none>>") == 0) ||
(context && (strcmp(context, newcon) == 0)) {
freecon(context);
goto out;
}
I will provide a patch and update.
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