diff options
Diffstat (limited to 'procfs/procfs.c')
| -rw-r--r-- | procfs/procfs.c | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/procfs/procfs.c b/procfs/procfs.c deleted file mode 100644 index cae4a519..00000000 --- a/procfs/procfs.c +++ /dev/null @@ -1,219 +0,0 @@ -/* Hurd /proc filesystem, basic infrastructure. - Copyright (C) 2010 Free Software Foundation, Inc. - - This file is part of the GNU Hurd. - - The GNU Hurd is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License as - published by the Free Software Foundation; either version 2, or (at - your option) any later version. - - The GNU Hurd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ - -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <fcntl.h> -#include <mach.h> -#include <hurd/netfs.h> -#include <hurd/fshelp.h> -#include "procfs.h" - -struct netnode -{ - const struct procfs_node_ops *ops; - void *hook; - - /* (cached) contents of the node */ - char *contents; - ssize_t contents_len; - - /* parent directory, if applicable */ - struct node *parent; -}; - -void -procfs_cleanup_contents_with_free (void *hook, char *cont, ssize_t len) -{ - free (cont); -} - -void -procfs_cleanup_contents_with_vm_deallocate (void *hook, char *cont, ssize_t len) -{ - vm_deallocate (mach_task_self (), (vm_address_t) cont, (vm_size_t) len); -} - -struct node *procfs_make_node (const struct procfs_node_ops *ops, void *hook) -{ - struct netnode *nn; - struct node *np; - - nn = malloc (sizeof *nn); - if (! nn) - goto fail; - - memset (nn, 0, sizeof *nn); - nn->ops = ops; - nn->hook = hook; - - np = netfs_make_node (nn); - if (! np) - goto fail; - - np->nn = nn; - memset (&np->nn_stat, 0, sizeof np->nn_stat); - np->nn_translated = 0; - - if (np->nn->ops->lookup) - np->nn_stat.st_mode = S_IFDIR | 0555; - else - np->nn_stat.st_mode = S_IFREG | 0444; - - np->nn_stat.st_uid = getuid (); - np->nn_stat.st_gid = getgid (); - - return np; - -fail: - if (ops->cleanup) - ops->cleanup (hook); - - free (nn); - return NULL; -} - -void procfs_node_chown (struct node *np, uid_t owner) -{ - np->nn_stat.st_uid = owner; -} - -void procfs_node_chmod (struct node *np, mode_t mode) -{ - np->nn_stat.st_mode = (np->nn_stat.st_mode & ~ALLPERMS) | mode; - np->nn_translated = np->nn_stat.st_mode; -} - -void procfs_node_chtype (struct node *np, mode_t type) -{ - np->nn_stat.st_mode = (np->nn_stat.st_mode & ~S_IFMT) | type; - np->nn_translated = np->nn_stat.st_mode; - if (type == S_IFLNK) - procfs_node_chmod (np, 0777); -} - -/* FIXME: possibly not the fastest hash function... */ -ino64_t -procfs_make_ino (struct node *np, const char *filename) -{ - unsigned short x[3]; - - if (! strcmp (filename, ".")) - return np->nn_stat.st_ino; - if (! strcmp (filename, "..")) - return np->nn->parent ? np->nn->parent->nn_stat.st_ino : /* FIXME: */ 2; - - assert (sizeof np->nn_stat.st_ino > sizeof x); - memcpy (x, &np->nn_stat.st_ino, sizeof x); - - while (*filename) - { - x[0] ^= *(filename++); - jrand48 (x); - } - - return (unsigned long) jrand48 (x); -} - -error_t procfs_get_contents (struct node *np, char **data, ssize_t *data_len) -{ - if (! np->nn->contents && np->nn->ops->get_contents) - { - char *contents; - ssize_t contents_len; - error_t err; - - contents_len = -1; - err = np->nn->ops->get_contents (np->nn->hook, &contents, &contents_len); - if (err) - return err; - if (contents_len < 0) - return ENOMEM; - - np->nn->contents = contents; - np->nn->contents_len = contents_len; - } - - *data = np->nn->contents; - *data_len = np->nn->contents_len; - return 0; -} - -void procfs_refresh (struct node *np) -{ - if (np->nn->contents && np->nn->ops->cleanup_contents) - np->nn->ops->cleanup_contents (np->nn->hook, np->nn->contents, np->nn->contents_len); - - np->nn->contents = NULL; -} - -error_t procfs_lookup (struct node *np, const char *name, struct node **npp) -{ - error_t err = ENOENT; - - if (err && ! strcmp (name, ".")) - { - netfs_nref(*npp = np); - err = 0; - } - - if (err && np->nn->parent && ! strcmp (name, "..")) - { - netfs_nref(*npp = np->nn->parent); - err = 0; - } - - if (err && np->nn->ops->lookup) - { - err = np->nn->ops->lookup (np->nn->hook, name, npp); - if (! err) - { - (*npp)->nn_stat.st_ino = procfs_make_ino (np, name); - netfs_nref ((*npp)->nn->parent = np); - } - } - - return err; -} - -void procfs_cleanup (struct node *np) -{ - procfs_refresh (np); - - if (np->nn->ops->cleanup) - np->nn->ops->cleanup (np->nn->hook); - - if (np->nn->parent) - netfs_nrele (np->nn->parent); - - free (np->nn); -} - -error_t procfs_get_translator (struct node *np, - char **argz, - size_t *argz_len) -{ - if (np->nn->ops->get_translator) - return np->nn->ops->get_translator (np->nn->hook, argz, argz_len); - - *argz = NULL; - *argz_len = 0; - return 0; -} |