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* netfs.c (netfs_get_translator): New function.
* procfs.c (procfs_get_translator): Likewise.
* procfs.h (struct procfs_node_ops): New field get_translator.
(procfs_get_translator): New function declaration.
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Formerly all nodes were created so that they were owned by root:root
by default. This causes problems if the procfs translator is running
as unprivileged user and serves passive translator records, because
the file ownership is being used as credentials for starting
translators. This obviously fails if the procfs translator is not root
but is trying to acquire credentials including uid/gid 0.
Fix this by using the uid/gid of the procfs translator by default.
procfs.c (procfs_make_node): Fix default node ownership.
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Formerly only the mode_t bits cut out by S_IFMT were preserved, but
this does not include S_IPTRANS. Fix this by preserving everything but
the permission bits.
* procfs.c (procfs_node_chmod): Fix bitmask.
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* procfs.c (procfs_make_ino): Use 2 rather than 42 as a temporary hack,
since 2 is the root's inode with ext2fs.
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* dircat.c, dircat.h, main.c, main.h, netfs.c, process.c, process.h,
procfs.c, procfs.h, procfs_dir.c, procfs_dir.h, proclist.c,
proclist.h, rootdir.c, rootdir.h: Add copyright notices.
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This is necessary for top, for instance, which keeps some files open and
re-reads them regularly. As an extra bonus we can drop the refresh hack.
* procfs.c, procfs.h: Remove the refresh hack.
(procfs_refresh): New function, invalidates the cached contents.
* netfs.c (netfs_attempt_read, netfs_get_dirents): Call
procfs_refresh when the read is from offset 0.
* proclist.c (proclist_make_node): Remove the refresh hack.
* dircat.c (dircat_make_node): Likewise.
(dircat_get_contents): Use procfs_refresh to avoid keeping old data
from the component nodes.
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* procfs.h: Make CONTENTS_LEN an ssize_t rather than a size_t,
and document the change.
* procfs.c (procfs_get_contents): Initialize CONTENTS_LEN to a
negative value, and fail with ENOMEM if it's still negative after the
callback returns. (everywhere): Update to ssize_t.
* dircat.c, netfs.c, process.c,
procfs_dir.c, proclist.c, rootdir.c: Update to
ssize_t and the new GET_CONTENTS semantics.
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* procfs.h (procfs_cleanup_contents_with_free,
procfs_cleanup_contents_with_vm_deallocate, procfs_get_contents,
struct procfs_ops): Change CONTENTS from a void pointer to a char one.
* dircat.c, netfs.c, process.c, procfs.c,
procfs_dir.c, proclist.c, rootdir.c: Update.
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* procfs.c, procfs.h (procfs_node_chown,
procfs_node_chmod, procfs_node_chtype): New functions, encapsulate
access to some nn_stat fields.
* process.c (process_lookup_pid): Use procfs_node_chown instead
of direct access.
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* Makefile: Add libps to the $(LIBS).
* proclist.c, proclist.h: Embed the proc server port in a
ps_context structure. (proclist_make_node): Change to prototype to
allow for the possibility of error. Rename to proclist_create_node to
reflect the change and non-triviality.
* process.c, process.h: Revamp. Use a full-blown procstat
structure instead of just the procinfo fetched from the process
server. Use the additional data to complement [pid]/stat.
(process_lookup_pid): Get a ps_context structure instead of a port to
the process server.
* main.c (root_make_node): Convert to the new interface for
proclist_create_node.
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* procfs.h, procfs.c (procfs_make_ino): New function,
invents an inode number by hashing the parent's and the name of an
entry. (procfs_lookup): Use it to assign an inode number to child
nodes at lookup time.
* main.c (root_make_node): Assign an arbitrary inode number to
the root directory.
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* procfs.c (procfs_lookup): Keep track of the parent directory,
implement the lookup of the dot-directories. (procfs_cleanup):
Release the reference to the parent node, if applicable.
* procfs.h: Add a comment about the parent reference.
* netfs.c (netfs_attempt_lookup): Lock the looked up node after
the directory has been unlocked, in case they are the same.
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* dircat.c, dircat.h: New files, merge directories.
* Makefile: Add the dircat module.
* main.c: Use dircat to merge the proclist into the root
directory, instead of having it as a stand-alone one.
* procfs.h, procfs.c: Add a "refresh hack" to have the
contents of the root directory recreated on each request.
* proclist.c (proclist_make_node): Enable the hack in question.
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* procfs.c, procfs.h: Extend the signature of the
cleanup_contents callback in the procfs_node_ops structure to include
the hook and contents_len. (cleanup_contents_with_free,
cleanup_contents_with_vm_deallocate): New functions, can be used as
a cleanup_contents callback for simple cases.
* procfs_dir.c, procfs_dir.h (procfs_dir_make_node):
Update, add a cleanup callback, make sure the cleanup callback is
invoked if there is an error.
* proclist.c (proclist_make_node), main.c (main): Update to match
the new interfaces.
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* procfs.c (procfs_make_node): Invoke the cleanup callback on
failure, so that callers don't have to.
* procfs.h: Document the change.
* procfs_dir.c (procfs_dir_make_node), procfs_file.c
(procfs_file_make_node), proclist.c (proclist_make_node):
Update to reflect the change.
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* procfs.h: New file; basic interfaces for procfs nodes.
* procfs.c: New file; implement the basic infrastructure.
* netfs.c: New file; bridge libnetfs and the procfs interfaces.
* main.c: New file; mostly a "Hello, World!" for now.
* Makefile: New file; standalone for now.
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