add --module flag

Support a new concept in containers.conf called "modules".  A "module"
is a containers.conf file located at a specific directory.  More than
one module can be loaded in the specified order, following existing
override semantics.

There are three directories to load modules from:
 - $CONFIG_HOME/containers/containers.conf.modules
 - /etc/containers/containers.conf.modules
 - /usr/share/containers/containers.conf.modules

With CONFIG_HOME pointing to $HOME/.config or, if set, $XDG_CONFIG_HOME.
Absolute paths will be loaded as is, relative paths will be resolved
relative to the three directories above allowing for admin configs
(/etc/) to override system configs (/usr/share/) and user configs
($CONFIG_HOME) to override admin configs.

Pulls in containers/common/pull/1599.

Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>
This commit is contained in:
Valentin Rothberg
2023-08-09 15:50:15 +02:00
parent 9cd4286922
commit d5841ed528
65 changed files with 1253 additions and 756 deletions

View File

@@ -187,6 +187,7 @@ func requestFromPacket(ctx context.Context, pkt hasPath, baseDir string) *Reques
// NOTE: given a POSIX compliant signature: symlink(target, linkpath string)
// this makes Request.Target the linkpath, and Request.Filepath the target.
request.Target = cleanPathWithBase(baseDir, p.Linkpath)
request.Filepath = p.Targetpath
case *sshFxpExtendedPacketHardlink:
request.Target = cleanPathWithBase(baseDir, p.Newpath)
}
@@ -294,7 +295,12 @@ func (r *Request) call(handlers Handlers, pkt requestPacket, alloc *allocator, o
return filecmd(handlers.FileCmd, r, pkt)
case "List":
return filelist(handlers.FileList, r, pkt)
case "Stat", "Lstat", "Readlink":
case "Stat", "Lstat":
return filestat(handlers.FileList, r, pkt)
case "Readlink":
if readlinkFileLister, ok := handlers.FileList.(ReadlinkFileLister); ok {
return readlink(readlinkFileLister, r, pkt)
}
return filestat(handlers.FileList, r, pkt)
default:
return statusFromError(pkt.id(), fmt.Errorf("unexpected method: %s", r.Method))
@@ -598,6 +604,23 @@ func filestat(h FileLister, r *Request, pkt requestPacket) responsePacket {
}
}
func readlink(readlinkFileLister ReadlinkFileLister, r *Request, pkt requestPacket) responsePacket {
resolved, err := readlinkFileLister.Readlink(r.Filepath)
if err != nil {
return statusFromError(pkt.id(), err)
}
return &sshFxpNamePacket{
ID: pkt.id(),
NameAttrs: []*sshFxpNameAttr{
{
Name: resolved,
LongName: resolved,
Attrs: emptyFileStat,
},
},
}
}
// init attributes of request object from packet data
func requestMethod(p requestPacket) (method string) {
switch p.(type) {