mirror of
https://github.com/MidnightCommander/mc
synced 2024-12-22 20:36:50 +03:00
a2a01d94e9
Steps to reproduce: * cd ftp://ftp.gnome.org/ * Run "cd" in the panel where the remote site is open * cd ftp://ftp.kernel.org/ Actual result: The directory content from ftp.gnome.org FTP-server. Expected results: The directory content from kernel.org FTP-server. Signed-off-by: Slava Zanko <slavazanko@gmail.com>
1599 lines
43 KiB
C
1599 lines
43 KiB
C
/*
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Directory cache support
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Copyright (C) 1998, 2011
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The Free Software Foundation, Inc.
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Written by:
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Pavel Machek <pavel@ucw.cz>, 1998
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This file is part of the Midnight Commander.
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The Midnight Commander is free software: you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of the License,
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or (at your option) any later version.
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The Midnight Commander is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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\warning Paths here do _not_ begin with '/', so root directory of
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archive/site is simply "".
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*/
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/** \file
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* \brief Source: directory cache support
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*
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* So that you do not have copy of this in each and every filesystem.
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*
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* Very loosely based on tar.c from midnight and archives.[ch] from
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* avfs by Miklos Szeredi (mszeredi@inf.bme.hu)
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*
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* Unfortunately, I was unable to keep all filesystems
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* uniform. tar-like filesystems use tree structure where each
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* directory has pointers to its subdirectories. We can do this
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* because we have full information about our archive.
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*
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* At ftp-like filesystems, situation is a little bit different. When
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* you cd /usr/src/linux/drivers/char, you do _not_ want /usr,
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* /usr/src, /usr/src/linux and /usr/src/linux/drivers to be
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* listed. That means that we do not have complete information, and if
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* /usr is symlink to /4, we will not know. Also we have to time out
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* entries and things would get messy with tree-like approach. So we
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* do different trick: root directory is completely special and
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* completely fake, it contains entries such as 'usr', 'usr/src', ...,
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* and we'll try to use custom find_entry function.
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*
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* \author Pavel Machek <pavel@ucw.cz>
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* \date 1998
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*
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*/
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#include <config.h>
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#include <errno.h>
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#include <fcntl.h> /* include fcntl.h -> sys/fcntl.h only */
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/* includes fcntl.h see IEEE Std 1003.1-2008 */
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#include <time.h>
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#include <sys/time.h> /* gettimeofday() */
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#include <inttypes.h> /* uintmax_t */
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#include <stdarg.h>
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#include "lib/global.h"
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#include "lib/tty/tty.h" /* enable/disable interrupt key */
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#include "lib/util.h" /* custom_canonicalize_pathname() */
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#if 0
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#include "lib/widget.h" /* message() */
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#endif
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#include "vfs.h"
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#include "utilvfs.h"
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#include "xdirentry.h"
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#include "gc.h" /* vfs_rmstamp */
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/*** global variables ****************************************************************************/
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/*** file scope macro definitions ****************************************************************/
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#define CALL(x) if (MEDATA->x) MEDATA->x
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/*** file scope type declarations ****************************************************************/
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struct dirhandle
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{
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GList *cur;
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struct vfs_s_inode *dir;
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};
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/*** file scope variables ************************************************************************/
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static volatile int total_inodes = 0, total_entries = 0;
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/*** file scope functions ************************************************************************/
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/* --------------------------------------------------------------------------------------------- */
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static int
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vfs_s_entry_compare (const void *a, const void *b)
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{
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const struct vfs_s_entry *e = (const struct vfs_s_entry *) a;
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const char *name = (const char *) b;
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return strcmp (e->name, name);
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}
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/* --------------------------------------------------------------------------------------------- */
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/* We were asked to create entries automagically */
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static struct vfs_s_entry *
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vfs_s_automake (struct vfs_class *me, struct vfs_s_inode *dir, char *path, int flags)
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{
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struct vfs_s_entry *res;
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char *sep;
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sep = strchr (path, PATH_SEP);
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if (sep != NULL)
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*sep = '\0';
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res = vfs_s_generate_entry (me, path, dir, flags & FL_MKDIR ? (0777 | S_IFDIR) : 0777);
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vfs_s_insert_entry (me, dir, res);
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if (sep != NULL)
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*sep = PATH_SEP;
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return res;
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}
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/* --------------------------------------------------------------------------------------------- */
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/* If the entry is a symlink, find the entry for its target */
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static struct vfs_s_entry *
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vfs_s_resolve_symlink (struct vfs_class *me, struct vfs_s_entry *entry, int follow)
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{
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char *linkname;
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char *fullname = NULL;
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struct vfs_s_entry *target;
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if (follow == LINK_NO_FOLLOW)
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return entry;
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if (follow == 0)
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ERRNOR (ELOOP, NULL);
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if (!entry)
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ERRNOR (ENOENT, NULL);
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if (!S_ISLNK (entry->ino->st.st_mode))
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return entry;
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linkname = entry->ino->linkname;
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if (linkname == NULL)
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ERRNOR (EFAULT, NULL);
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/* make full path from relative */
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if (*linkname != PATH_SEP)
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{
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char *fullpath = vfs_s_fullpath (me, entry->dir);
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if (fullpath)
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{
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fullname = g_strconcat (fullpath, "/", linkname, (char *) NULL);
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linkname = fullname;
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g_free (fullpath);
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}
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}
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target = (MEDATA->find_entry) (me, entry->dir->super->root, linkname, follow - 1, 0);
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g_free (fullname);
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return target;
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}
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/* --------------------------------------------------------------------------------------------- */
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/*
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* Follow > 0: follow links, serves as loop protect,
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* == -1: do not follow links
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*/
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static struct vfs_s_entry *
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vfs_s_find_entry_tree (struct vfs_class *me, struct vfs_s_inode *root,
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const char *a_path, int follow, int flags)
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{
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size_t pseg;
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struct vfs_s_entry *ent = NULL;
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char *const pathref = g_strdup (a_path);
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char *path = pathref;
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/* canonicalize as well, but don't remove '../' from path */
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custom_canonicalize_pathname (path, CANON_PATH_ALL & (~CANON_PATH_REMDOUBLEDOTS));
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while (root != NULL)
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{
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GList *iter;
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while (*path == PATH_SEP) /* Strip leading '/' */
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path++;
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if (path[0] == '\0')
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{
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g_free (pathref);
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return ent;
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}
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for (pseg = 0; path[pseg] != '\0' && path[pseg] != PATH_SEP; pseg++)
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;
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for (iter = root->subdir; iter != NULL; iter = g_list_next (iter))
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{
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ent = (struct vfs_s_entry *) iter->data;
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if (strlen (ent->name) == pseg && strncmp (ent->name, path, pseg) == 0)
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/* FOUND! */
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break;
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}
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ent = iter != NULL ? (struct vfs_s_entry *) iter->data : NULL;
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if (ent == NULL && (flags & (FL_MKFILE | FL_MKDIR)) != 0)
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ent = vfs_s_automake (me, root, path, flags);
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if (ent == NULL)
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{
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me->verrno = ENOENT;
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goto cleanup;
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}
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path += pseg;
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/* here we must follow leading directories always;
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only the actual file is optional */
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ent = vfs_s_resolve_symlink (me, ent,
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strchr (path, PATH_SEP) != NULL ? LINK_FOLLOW : follow);
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if (ent == NULL)
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goto cleanup;
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root = ent->ino;
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}
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cleanup:
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g_free (pathref);
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return NULL;
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}
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/* --------------------------------------------------------------------------------------------- */
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static struct vfs_s_entry *
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vfs_s_find_entry_linear (struct vfs_class *me, struct vfs_s_inode *root,
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const char *a_path, int follow, int flags)
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{
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struct vfs_s_entry *ent = NULL;
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char *const path = g_strdup (a_path);
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struct vfs_s_entry *retval = NULL;
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GList *iter;
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if (root->super->root != root)
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vfs_die ("We have to use _real_ root. Always. Sorry.");
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/* canonicalize as well, but don't remove '../' from path */
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custom_canonicalize_pathname (path, CANON_PATH_ALL & (~CANON_PATH_REMDOUBLEDOTS));
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if ((flags & FL_DIR) == 0)
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{
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char *dirname, *name;
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struct vfs_s_inode *ino;
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dirname = g_path_get_dirname (path);
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name = g_path_get_basename (path);
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ino = vfs_s_find_inode (me, root->super, dirname, follow, flags | FL_DIR);
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retval = vfs_s_find_entry_tree (me, ino, name, follow, flags);
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g_free (dirname);
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g_free (name);
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g_free (path);
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return retval;
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}
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iter = g_list_find_custom (root->subdir, path, (GCompareFunc) vfs_s_entry_compare);
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ent = iter != NULL ? (struct vfs_s_entry *) iter->data : NULL;
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if (ent != NULL && !MEDATA->dir_uptodate (me, ent->ino))
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{
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#if 1
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vfs_print_message (_("Directory cache expired for %s"), path);
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#endif
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vfs_s_free_entry (me, ent);
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ent = NULL;
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}
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if (ent == NULL)
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{
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struct vfs_s_inode *ino;
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ino = vfs_s_new_inode (me, root->super, vfs_s_default_stat (me, S_IFDIR | 0755));
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ent = vfs_s_new_entry (me, path, ino);
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if (MEDATA->dir_load (me, ino, path) == -1)
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{
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vfs_s_free_entry (me, ent);
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g_free (path);
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return NULL;
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}
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vfs_s_insert_entry (me, root, ent);
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iter = g_list_find_custom (root->subdir, path, (GCompareFunc) vfs_s_entry_compare);
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ent = iter != NULL ? (struct vfs_s_entry *) iter->data : NULL;
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}
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if (ent == NULL)
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vfs_die ("find_linear: success but directory is not there\n");
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#if 0
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if (!vfs_s_resolve_symlink (me, ent, follow))
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{
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g_free (path);
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return NULL;
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}
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#endif
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g_free (path);
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return ent;
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}
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/* --------------------------------------------------------------------------------------------- */
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/* Ook, these were functions around directory entries / inodes */
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/* -------------------------------- superblock games -------------------------- */
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static struct vfs_s_super *
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vfs_s_new_super (struct vfs_class *me)
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{
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struct vfs_s_super *super;
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super = g_new0 (struct vfs_s_super, 1);
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super->me = me;
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return super;
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}
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/* --------------------------------------------------------------------------------------------- */
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static inline void
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vfs_s_insert_super (struct vfs_class *me, struct vfs_s_super *super)
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{
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MEDATA->supers = g_list_prepend (MEDATA->supers, super);
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}
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/* --------------------------------------------------------------------------------------------- */
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static void
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vfs_s_free_super (struct vfs_class *me, struct vfs_s_super *super)
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{
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if (super->root != NULL)
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{
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vfs_s_free_inode (me, super->root);
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super->root = NULL;
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}
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#if 0
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/* FIXME: We currently leak small ammount of memory, sometimes. Fix it if you can. */
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if (super->ino_usage)
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message (D_ERROR, "Direntry warning",
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"Super ino_usage is %d, memory leak", super->ino_usage);
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if (super->want_stale)
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message (D_ERROR, "Direntry warning", "%s", "Super has want_stale set");
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#endif
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MEDATA->supers = g_list_remove (MEDATA->supers, super);
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CALL (free_archive) (me, super);
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#ifdef ENABLE_VFS_NET
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vfs_path_element_free (super->path_element);
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#endif
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g_free (super->name);
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g_free (super);
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}
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/* --------------------------------------------------------------------------------------------- */
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/* Support of archives */
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/* ------------------------ readdir & friends ----------------------------- */
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static struct vfs_s_inode *
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vfs_s_inode_from_path (const vfs_path_t * vpath, int flags)
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{
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struct vfs_s_super *super;
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struct vfs_s_inode *ino;
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const char *q;
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const vfs_path_element_t *path_element;
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q = vfs_s_get_path (vpath, &super, 0);
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if (q == NULL)
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return NULL;
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path_element = vfs_path_get_by_index (vpath, -1);
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ino =
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vfs_s_find_inode (path_element->class, super, q,
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flags & FL_FOLLOW ? LINK_FOLLOW : LINK_NO_FOLLOW, flags & ~FL_FOLLOW);
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if ((!ino) && (!*q))
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/* We are asking about / directory of ftp server: assume it exists */
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ino =
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vfs_s_find_inode (path_element->class, super, q,
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flags & FL_FOLLOW ? LINK_FOLLOW :
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LINK_NO_FOLLOW, FL_DIR | (flags & ~FL_FOLLOW));
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return ino;
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}
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/* --------------------------------------------------------------------------------------------- */
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static void *
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vfs_s_opendir (const vfs_path_t * vpath)
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{
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struct vfs_s_inode *dir;
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struct dirhandle *info;
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const vfs_path_element_t *path_element;
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path_element = vfs_path_get_by_index (vpath, -1);
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dir = vfs_s_inode_from_path (vpath, FL_DIR | FL_FOLLOW);
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if (dir == NULL)
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return NULL;
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if (!S_ISDIR (dir->st.st_mode))
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{
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path_element->class->verrno = ENOTDIR;
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return NULL;
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}
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dir->st.st_nlink++;
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#if 0
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if (dir->subdir == NULL) /* This can actually happen if we allow empty directories */
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{
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path_element->class->verrno = EAGAIN;
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return NULL;
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}
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#endif
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info = g_new (struct dirhandle, 1);
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info->cur = dir->subdir;
|
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info->dir = dir;
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return info;
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}
|
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|
|
/* --------------------------------------------------------------------------------------------- */
|
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|
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static void *
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vfs_s_readdir (void *data)
|
|
{
|
|
static union vfs_dirent dir;
|
|
struct dirhandle *info = (struct dirhandle *) data;
|
|
const char *name;
|
|
|
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if (info->cur == NULL || info->cur->data == NULL)
|
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return NULL;
|
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name = ((struct vfs_s_entry *) info->cur->data)->name;
|
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if (name != NULL)
|
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g_strlcpy (dir.dent.d_name, name, MC_MAXPATHLEN);
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else
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vfs_die ("Null in structure-cannot happen");
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|
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compute_namelen (&dir.dent);
|
|
info->cur = g_list_next (info->cur);
|
|
|
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return (void *) &dir;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static int
|
|
vfs_s_closedir (void *data)
|
|
{
|
|
struct dirhandle *info = (struct dirhandle *) data;
|
|
struct vfs_s_inode *dir = info->dir;
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|
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vfs_s_free_inode (dir->super->me, dir);
|
|
g_free (data);
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return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static int
|
|
vfs_s_chdir (const vfs_path_t * vpath)
|
|
{
|
|
void *data;
|
|
|
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data = vfs_s_opendir (vpath);
|
|
if (data == NULL)
|
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return -1;
|
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vfs_s_closedir (data);
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return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
/* --------------------------- stat and friends ---------------------------- */
|
|
|
|
static int
|
|
vfs_s_internal_stat (const vfs_path_t * vpath, struct stat *buf, int flag)
|
|
{
|
|
struct vfs_s_inode *ino;
|
|
|
|
ino = vfs_s_inode_from_path (vpath, flag);
|
|
if (ino == NULL)
|
|
return -1;
|
|
*buf = ino->st;
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static int
|
|
vfs_s_stat (const vfs_path_t * vpath, struct stat *buf)
|
|
{
|
|
return vfs_s_internal_stat (vpath, buf, FL_FOLLOW);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static int
|
|
vfs_s_lstat (const vfs_path_t * vpath, struct stat *buf)
|
|
{
|
|
return vfs_s_internal_stat (vpath, buf, FL_NONE);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static int
|
|
vfs_s_fstat (void *fh, struct stat *buf)
|
|
{
|
|
*buf = FH->ino->st;
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static int
|
|
vfs_s_readlink (const vfs_path_t * vpath, char *buf, size_t size)
|
|
{
|
|
struct vfs_s_inode *ino;
|
|
size_t len;
|
|
const vfs_path_element_t *path_element;
|
|
|
|
path_element = vfs_path_get_by_index (vpath, -1);
|
|
|
|
ino = vfs_s_inode_from_path (vpath, 0);
|
|
if (!ino)
|
|
return -1;
|
|
|
|
if (!S_ISLNK (ino->st.st_mode))
|
|
{
|
|
path_element->class->verrno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
if (ino->linkname == NULL)
|
|
{
|
|
path_element->class->verrno = EFAULT;
|
|
return -1;
|
|
}
|
|
|
|
len = strlen (ino->linkname);
|
|
if (size < len)
|
|
len = size;
|
|
/* readlink() does not append a NUL character to buf */
|
|
memcpy (buf, ino->linkname, len);
|
|
return len;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static ssize_t
|
|
vfs_s_read (void *fh, char *buffer, size_t count)
|
|
{
|
|
int n;
|
|
struct vfs_class *me = FH_SUPER->me;
|
|
|
|
if (FH->linear == LS_LINEAR_PREOPEN)
|
|
{
|
|
if (!MEDATA->linear_start (me, FH, FH->pos))
|
|
return -1;
|
|
}
|
|
|
|
if (FH->linear == LS_LINEAR_CLOSED)
|
|
vfs_die ("linear_start() did not set linear_state!");
|
|
|
|
if (FH->linear == LS_LINEAR_OPEN)
|
|
return MEDATA->linear_read (me, FH, buffer, count);
|
|
|
|
if (FH->handle != -1)
|
|
{
|
|
n = read (FH->handle, buffer, count);
|
|
if (n < 0)
|
|
me->verrno = errno;
|
|
return n;
|
|
}
|
|
vfs_die ("vfs_s_read: This should not happen\n");
|
|
return -1;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static ssize_t
|
|
vfs_s_write (void *fh, const char *buffer, size_t count)
|
|
{
|
|
int n;
|
|
struct vfs_class *me = FH_SUPER->me;
|
|
|
|
if (FH->linear)
|
|
vfs_die ("no writing to linear files, please");
|
|
|
|
FH->changed = 1;
|
|
if (FH->handle != -1)
|
|
{
|
|
n = write (FH->handle, buffer, count);
|
|
if (n < 0)
|
|
me->verrno = errno;
|
|
return n;
|
|
}
|
|
vfs_die ("vfs_s_write: This should not happen\n");
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static off_t
|
|
vfs_s_lseek (void *fh, off_t offset, int whence)
|
|
{
|
|
off_t size = FH->ino->st.st_size;
|
|
|
|
if (FH->linear == LS_LINEAR_OPEN)
|
|
vfs_die ("cannot lseek() after linear_read!");
|
|
|
|
if (FH->handle != -1)
|
|
{ /* If we have local file opened, we want to work with it */
|
|
off_t retval = lseek (FH->handle, offset, whence);
|
|
if (retval == -1)
|
|
FH->ino->super->me->verrno = errno;
|
|
return retval;
|
|
}
|
|
|
|
switch (whence)
|
|
{
|
|
case SEEK_CUR:
|
|
offset += FH->pos;
|
|
break;
|
|
case SEEK_END:
|
|
offset += size;
|
|
break;
|
|
}
|
|
if (offset < 0)
|
|
FH->pos = 0;
|
|
else if (offset < size)
|
|
FH->pos = offset;
|
|
else
|
|
FH->pos = size;
|
|
return FH->pos;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static int
|
|
vfs_s_close (void *fh)
|
|
{
|
|
int res = 0;
|
|
struct vfs_class *me = FH_SUPER->me;
|
|
|
|
FH_SUPER->fd_usage--;
|
|
if (!FH_SUPER->fd_usage)
|
|
vfs_stamp_create (me, FH_SUPER);
|
|
|
|
if (FH->linear == LS_LINEAR_OPEN)
|
|
MEDATA->linear_close (me, fh);
|
|
if (MEDATA->fh_close)
|
|
res = MEDATA->fh_close (me, fh);
|
|
if ((MEDATA->flags & VFS_S_USETMP) && FH->changed && MEDATA->file_store)
|
|
{
|
|
char *s = vfs_s_fullpath (me, FH->ino);
|
|
if (!s)
|
|
res = -1;
|
|
else
|
|
{
|
|
res = MEDATA->file_store (me, fh, s, FH->ino->localname);
|
|
g_free (s);
|
|
}
|
|
vfs_s_invalidate (me, FH_SUPER);
|
|
}
|
|
if (FH->handle != -1)
|
|
close (FH->handle);
|
|
|
|
vfs_s_free_inode (me, FH->ino);
|
|
if (MEDATA->fh_free_data != NULL)
|
|
MEDATA->fh_free_data (fh);
|
|
g_free (fh);
|
|
return res;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static void
|
|
vfs_s_print_stats (const char *fs_name, const char *action,
|
|
const char *file_name, off_t have, off_t need)
|
|
{
|
|
static const char *i18n_percent_transf_format = NULL;
|
|
static const char *i18n_transf_format = NULL;
|
|
|
|
if (i18n_percent_transf_format == NULL)
|
|
{
|
|
i18n_percent_transf_format = "%s: %s: %s %3d%% (%" PRIuMAX " %s";
|
|
i18n_transf_format = "%s: %s: %s %" PRIuMAX " %s";
|
|
}
|
|
|
|
if (need)
|
|
vfs_print_message (i18n_percent_transf_format, fs_name, action,
|
|
file_name, (int) ((double) have * 100 / need), (uintmax_t) have,
|
|
_("bytes transferred"));
|
|
else
|
|
vfs_print_message (i18n_transf_format, fs_name, action, file_name, (uintmax_t) have,
|
|
_("bytes transferred"));
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
/* ------------------------------- mc support ---------------------------- */
|
|
|
|
static void
|
|
vfs_s_fill_names (struct vfs_class *me, fill_names_f func)
|
|
{
|
|
GList *iter;
|
|
|
|
for (iter = MEDATA->supers; iter != NULL; iter = g_list_next (iter))
|
|
{
|
|
const struct vfs_s_super *super = (const struct vfs_s_super *) iter->data;
|
|
char *name;
|
|
|
|
name = g_strconcat (super->name, "/", me->prefix, VFS_PATH_URL_DELIMITER,
|
|
/* super->current_dir->name, */ (char *) NULL);
|
|
func (name);
|
|
g_free (name);
|
|
}
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static int
|
|
vfs_s_ferrno (struct vfs_class *me)
|
|
{
|
|
return me->verrno;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
/**
|
|
* Get local copy of the given file. We reuse the existing file cache
|
|
* for remote filesystems. Archives use standard VFS facilities.
|
|
*/
|
|
|
|
static vfs_path_t *
|
|
vfs_s_getlocalcopy (const vfs_path_t * vpath)
|
|
{
|
|
vfs_file_handler_t *fh;
|
|
vfs_path_t *local = NULL;
|
|
|
|
if (vpath == NULL)
|
|
return NULL;
|
|
|
|
fh = vfs_s_open (vpath, O_RDONLY, 0);
|
|
|
|
if (fh != NULL)
|
|
{
|
|
const struct vfs_class *me;
|
|
|
|
me = vfs_path_get_by_index (vpath, -1)->class;
|
|
if ((MEDATA->flags & VFS_S_USETMP) != 0 && (fh->ino != NULL))
|
|
local = vfs_path_from_str_flags (fh->ino->localname, VPF_NO_CANON);
|
|
|
|
vfs_s_close (fh);
|
|
}
|
|
|
|
return local;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
/**
|
|
* Return the local copy. Since we are using our cache, we do nothing -
|
|
* the cache will be removed when the archive is closed.
|
|
*/
|
|
|
|
static int
|
|
vfs_s_ungetlocalcopy (const vfs_path_t * vpath, const vfs_path_t * local, gboolean has_changed)
|
|
{
|
|
(void) vpath;
|
|
(void) local;
|
|
(void) has_changed;
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static int
|
|
vfs_s_setctl (const vfs_path_t * vpath, int ctlop, void *arg)
|
|
{
|
|
const vfs_path_element_t *path_element;
|
|
|
|
path_element = vfs_path_get_by_index (vpath, -1);
|
|
|
|
switch (ctlop)
|
|
{
|
|
case VFS_SETCTL_STALE_DATA:
|
|
{
|
|
struct vfs_s_inode *ino;
|
|
|
|
ino = vfs_s_inode_from_path (vpath, 0);
|
|
if (ino == NULL)
|
|
return 0;
|
|
if (arg)
|
|
ino->super->want_stale = 1;
|
|
else
|
|
{
|
|
ino->super->want_stale = 0;
|
|
vfs_s_invalidate (path_element->class, ino->super);
|
|
}
|
|
return 1;
|
|
}
|
|
case VFS_SETCTL_LOGFILE:
|
|
((struct vfs_s_subclass *) path_element->class->data)->logfile = fopen ((char *) arg, "w");
|
|
return 1;
|
|
case VFS_SETCTL_FLUSH:
|
|
((struct vfs_s_subclass *) path_element->class->data)->flush = 1;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
/* ----------------------------- Stamping support -------------------------- */
|
|
|
|
static vfsid
|
|
vfs_s_getid (const vfs_path_t * vpath)
|
|
{
|
|
struct vfs_s_super *archive = NULL;
|
|
const char *p;
|
|
|
|
p = vfs_s_get_path (vpath, &archive, FL_NO_OPEN);
|
|
if (p == NULL)
|
|
return NULL;
|
|
|
|
return (vfsid) archive;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static int
|
|
vfs_s_nothingisopen (vfsid id)
|
|
{
|
|
(void) id;
|
|
/* Our data structures should survive free of superblock at any time */
|
|
return 1;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static void
|
|
vfs_s_free (vfsid id)
|
|
{
|
|
vfs_s_free_super (((struct vfs_s_super *) id)->me, (struct vfs_s_super *) id);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
static int
|
|
vfs_s_dir_uptodate (struct vfs_class *me, struct vfs_s_inode *ino)
|
|
{
|
|
struct timeval tim;
|
|
|
|
if (MEDATA->flush)
|
|
{
|
|
MEDATA->flush = 0;
|
|
return 0;
|
|
}
|
|
|
|
gettimeofday (&tim, NULL);
|
|
if (tim.tv_sec < ino->timestamp.tv_sec)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
/*** public functions ****************************************************************************/
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
struct vfs_s_inode *
|
|
vfs_s_new_inode (struct vfs_class *me, struct vfs_s_super *super, struct stat *initstat)
|
|
{
|
|
struct vfs_s_inode *ino;
|
|
|
|
ino = g_try_new0 (struct vfs_s_inode, 1);
|
|
if (ino == NULL)
|
|
return NULL;
|
|
|
|
if (initstat)
|
|
ino->st = *initstat;
|
|
ino->super = super;
|
|
ino->st.st_nlink = 0;
|
|
ino->st.st_ino = MEDATA->inode_counter++;
|
|
ino->st.st_dev = MEDATA->rdev;
|
|
|
|
super->ino_usage++;
|
|
total_inodes++;
|
|
|
|
CALL (init_inode) (me, ino);
|
|
|
|
return ino;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
void
|
|
vfs_s_free_inode (struct vfs_class *me, struct vfs_s_inode *ino)
|
|
{
|
|
if (ino == NULL)
|
|
vfs_die ("Don't pass NULL to me");
|
|
|
|
/* ==0 can happen if freshly created entry is deleted */
|
|
if (ino->st.st_nlink > 1)
|
|
{
|
|
ino->st.st_nlink--;
|
|
return;
|
|
}
|
|
|
|
while (ino->subdir != NULL)
|
|
vfs_s_free_entry (me, (struct vfs_s_entry *) ino->subdir->data);
|
|
|
|
CALL (free_inode) (me, ino);
|
|
g_free (ino->linkname);
|
|
if ((MEDATA->flags & VFS_S_USETMP) != 0 && ino->localname != NULL)
|
|
{
|
|
unlink (ino->localname);
|
|
g_free (ino->localname);
|
|
}
|
|
total_inodes--;
|
|
ino->super->ino_usage--;
|
|
g_free (ino);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
struct vfs_s_entry *
|
|
vfs_s_new_entry (struct vfs_class *me, const char *name, struct vfs_s_inode *inode)
|
|
{
|
|
struct vfs_s_entry *entry;
|
|
|
|
entry = g_new0 (struct vfs_s_entry, 1);
|
|
total_entries++;
|
|
|
|
entry->name = g_strdup (name);
|
|
entry->ino = inode;
|
|
entry->ino->ent = entry;
|
|
CALL (init_entry) (me, entry);
|
|
|
|
return entry;
|
|
}
|
|
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
void
|
|
vfs_s_free_entry (struct vfs_class *me, struct vfs_s_entry *ent)
|
|
{
|
|
if (ent->dir != NULL)
|
|
ent->dir->subdir = g_list_remove (ent->dir->subdir, ent);
|
|
|
|
g_free (ent->name);
|
|
/* ent->name = NULL; */
|
|
|
|
if (ent->ino != NULL)
|
|
{
|
|
ent->ino->ent = NULL;
|
|
vfs_s_free_inode (me, ent->ino);
|
|
}
|
|
|
|
total_entries--;
|
|
g_free (ent);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
void
|
|
vfs_s_insert_entry (struct vfs_class *me, struct vfs_s_inode *dir, struct vfs_s_entry *ent)
|
|
{
|
|
(void) me;
|
|
|
|
ent->dir = dir;
|
|
|
|
ent->ino->st.st_nlink++;
|
|
dir->subdir = g_list_append (dir->subdir, ent);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
struct stat *
|
|
vfs_s_default_stat (struct vfs_class *me, mode_t mode)
|
|
{
|
|
static struct stat st;
|
|
int myumask;
|
|
|
|
(void) me;
|
|
|
|
myumask = umask (022);
|
|
umask (myumask);
|
|
mode &= ~myumask;
|
|
|
|
st.st_mode = mode;
|
|
st.st_ino = 0;
|
|
st.st_dev = 0;
|
|
st.st_rdev = 0;
|
|
st.st_uid = getuid ();
|
|
st.st_gid = getgid ();
|
|
st.st_size = 0;
|
|
st.st_mtime = st.st_atime = st.st_ctime = time (NULL);
|
|
|
|
return &st;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
struct vfs_s_entry *
|
|
vfs_s_generate_entry (struct vfs_class *me, const char *name, struct vfs_s_inode *parent,
|
|
mode_t mode)
|
|
{
|
|
struct vfs_s_inode *inode;
|
|
struct stat *st;
|
|
|
|
st = vfs_s_default_stat (me, mode);
|
|
inode = vfs_s_new_inode (me, parent->super, st);
|
|
|
|
return vfs_s_new_entry (me, name, inode);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
struct vfs_s_inode *
|
|
vfs_s_find_inode (struct vfs_class *me, const struct vfs_s_super *super,
|
|
const char *path, int follow, int flags)
|
|
{
|
|
struct vfs_s_entry *ent;
|
|
|
|
if (((MEDATA->flags & VFS_S_REMOTE) == 0) && (*path == '\0'))
|
|
return super->root;
|
|
|
|
ent = (MEDATA->find_entry) (me, super->root, path, follow, flags);
|
|
return (ent != NULL) ? ent->ino : NULL;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
/* Ook, these were functions around directory entries / inodes */
|
|
/* -------------------------------- superblock games -------------------------- */
|
|
/**
|
|
* get superlock object by vpath
|
|
*
|
|
* @param vpath path
|
|
* @return superlock object or NULL if not found
|
|
*/
|
|
|
|
struct vfs_s_super *
|
|
vfs_get_super_by_vpath (const vfs_path_t * vpath)
|
|
{
|
|
GList *iter;
|
|
void *cookie = NULL;
|
|
const vfs_path_element_t *path_element;
|
|
struct vfs_s_subclass *subclass;
|
|
struct vfs_s_super *super = NULL;
|
|
vfs_path_t *vpath_archive;
|
|
|
|
path_element = vfs_path_get_by_index (vpath, -1);
|
|
subclass = ((struct vfs_s_subclass *) path_element->class->data);
|
|
if (subclass == NULL)
|
|
return NULL;
|
|
|
|
vpath_archive = vfs_path_clone (vpath);
|
|
vfs_path_remove_element_by_index (vpath_archive, -1);
|
|
|
|
if (subclass->archive_check != NULL)
|
|
{
|
|
cookie = subclass->archive_check (vpath_archive);
|
|
if (cookie == NULL)
|
|
goto ret;
|
|
}
|
|
|
|
for (iter = subclass->supers; iter != NULL; iter = g_list_next (iter))
|
|
{
|
|
int i;
|
|
|
|
super = (struct vfs_s_super *) iter->data;
|
|
|
|
/* 0 == other, 1 == same, return it, 2 == other but stop scanning */
|
|
i = subclass->archive_same (path_element, super, vpath_archive, cookie);
|
|
if (i == 1)
|
|
goto ret;
|
|
if (i != 0)
|
|
break;
|
|
|
|
super = NULL;
|
|
}
|
|
|
|
ret:
|
|
vfs_path_free (vpath_archive);
|
|
return super;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
/**
|
|
* get path from last VFS-element and create corresponding superblock
|
|
*
|
|
* @param vpath source path object
|
|
* @param archive pointer to object for store newly created superblock
|
|
* @param flags flags
|
|
*
|
|
* @return path from last VFS-element
|
|
*/
|
|
const char *
|
|
vfs_s_get_path (const vfs_path_t * vpath, struct vfs_s_super **archive, int flags)
|
|
{
|
|
const char *retval = "";
|
|
int result = -1;
|
|
struct vfs_s_super *super;
|
|
const vfs_path_element_t *path_element;
|
|
struct vfs_s_subclass *subclass;
|
|
|
|
path_element = vfs_path_get_by_index (vpath, -1);
|
|
|
|
if (path_element->path != NULL)
|
|
retval = path_element->path;
|
|
|
|
super = vfs_get_super_by_vpath (vpath);
|
|
if (super != NULL)
|
|
goto return_success;
|
|
|
|
if (flags & FL_NO_OPEN)
|
|
{
|
|
path_element->class->verrno = EIO;
|
|
return NULL;
|
|
}
|
|
|
|
super = vfs_s_new_super (path_element->class);
|
|
|
|
subclass = ((struct vfs_s_subclass *) path_element->class->data);
|
|
if (subclass->open_archive != NULL)
|
|
{
|
|
vfs_path_t *vpath_archive;
|
|
|
|
vpath_archive = vfs_path_clone (vpath);
|
|
vfs_path_remove_element_by_index (vpath_archive, -1);
|
|
|
|
result = subclass->open_archive (super, vpath_archive, path_element);
|
|
vfs_path_free (vpath_archive);
|
|
}
|
|
if (result == -1)
|
|
{
|
|
vfs_s_free_super (path_element->class, super);
|
|
path_element->class->verrno = EIO;
|
|
return NULL;
|
|
}
|
|
if (!super->name)
|
|
vfs_die ("You have to fill name\n");
|
|
if (!super->root)
|
|
vfs_die ("You have to fill root inode\n");
|
|
|
|
vfs_s_insert_super (path_element->class, super);
|
|
vfs_stamp_create (path_element->class, super);
|
|
|
|
return_success:
|
|
*archive = super;
|
|
return retval;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
void
|
|
vfs_s_invalidate (struct vfs_class *me, struct vfs_s_super *super)
|
|
{
|
|
if (!super->want_stale)
|
|
{
|
|
vfs_s_free_inode (me, super->root);
|
|
super->root = vfs_s_new_inode (me, super, vfs_s_default_stat (me, S_IFDIR | 0755));
|
|
}
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
char *
|
|
vfs_s_fullpath (struct vfs_class *me, struct vfs_s_inode *ino)
|
|
{
|
|
if (!ino->ent)
|
|
ERRNOR (EAGAIN, NULL);
|
|
|
|
if ((MEDATA->flags & VFS_S_USETMP) == 0)
|
|
{
|
|
/* archives */
|
|
char *newpath;
|
|
char *path = g_strdup (ino->ent->name);
|
|
while (1)
|
|
{
|
|
ino = ino->ent->dir;
|
|
if (ino == ino->super->root)
|
|
break;
|
|
newpath = g_strconcat (ino->ent->name, "/", path, (char *) NULL);
|
|
g_free (path);
|
|
path = newpath;
|
|
}
|
|
return path;
|
|
}
|
|
|
|
/* remote systems */
|
|
if ((!ino->ent->dir) || (!ino->ent->dir->ent))
|
|
return g_strdup (ino->ent->name);
|
|
|
|
return g_strconcat (ino->ent->dir->ent->name, PATH_SEP_STR, ino->ent->name, (char *) NULL);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
/* --------------------------- stat and friends ---------------------------- */
|
|
|
|
void *
|
|
vfs_s_open (const vfs_path_t * vpath, int flags, mode_t mode)
|
|
{
|
|
int was_changed = 0;
|
|
vfs_file_handler_t *fh;
|
|
struct vfs_s_super *super;
|
|
const char *q;
|
|
struct vfs_s_inode *ino;
|
|
const vfs_path_element_t *path_element;
|
|
|
|
path_element = vfs_path_get_by_index (vpath, -1);
|
|
|
|
q = vfs_s_get_path (vpath, &super, 0);
|
|
if (q == NULL)
|
|
return NULL;
|
|
ino = vfs_s_find_inode (path_element->class, super, q, LINK_FOLLOW, FL_NONE);
|
|
if (ino && ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)))
|
|
{
|
|
path_element->class->verrno = EEXIST;
|
|
return NULL;
|
|
}
|
|
if (!ino)
|
|
{
|
|
char *dirname, *name;
|
|
struct vfs_s_entry *ent;
|
|
struct vfs_s_inode *dir;
|
|
int tmp_handle;
|
|
|
|
/* If the filesystem is read-only, disable file creation */
|
|
if (!(flags & O_CREAT) || !(path_element->class->write))
|
|
return NULL;
|
|
|
|
dirname = g_path_get_dirname (q);
|
|
name = g_path_get_basename (q);
|
|
dir = vfs_s_find_inode (path_element->class, super, dirname, LINK_FOLLOW, FL_DIR);
|
|
if (dir == NULL)
|
|
{
|
|
g_free (dirname);
|
|
g_free (name);
|
|
return NULL;
|
|
}
|
|
ent = vfs_s_generate_entry (path_element->class, name, dir, 0755);
|
|
ino = ent->ino;
|
|
vfs_s_insert_entry (path_element->class, dir, ent);
|
|
if ((VFSDATA (path_element)->flags & VFS_S_USETMP) != 0)
|
|
{
|
|
vfs_path_t *tmp_vpath;
|
|
|
|
tmp_handle = vfs_mkstemps (&tmp_vpath, path_element->class->name, name);
|
|
ino->localname = vfs_path_to_str (tmp_vpath);
|
|
vfs_path_free (tmp_vpath);
|
|
if (tmp_handle == -1)
|
|
{
|
|
g_free (dirname);
|
|
g_free (name);
|
|
return NULL;
|
|
}
|
|
|
|
close (tmp_handle);
|
|
}
|
|
g_free (dirname);
|
|
g_free (name);
|
|
was_changed = 1;
|
|
}
|
|
|
|
if (S_ISDIR (ino->st.st_mode))
|
|
{
|
|
path_element->class->verrno = EISDIR;
|
|
return NULL;
|
|
}
|
|
|
|
fh = g_new (vfs_file_handler_t, 1);
|
|
fh->pos = 0;
|
|
fh->ino = ino;
|
|
fh->handle = -1;
|
|
fh->changed = was_changed;
|
|
fh->linear = 0;
|
|
fh->data = NULL;
|
|
|
|
if (IS_LINEAR (flags))
|
|
{
|
|
if (VFSDATA (path_element)->linear_start)
|
|
{
|
|
vfs_print_message (_("Starting linear transfer..."));
|
|
fh->linear = LS_LINEAR_PREOPEN;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
struct vfs_s_subclass *s;
|
|
|
|
s = VFSDATA (path_element);
|
|
if (s->fh_open != NULL && s->fh_open (path_element->class, fh, flags, mode) != 0)
|
|
{
|
|
if (s->fh_free_data != NULL)
|
|
s->fh_free_data (fh);
|
|
g_free (fh);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if ((VFSDATA (path_element)->flags & VFS_S_USETMP) != 0 && fh->ino->localname != NULL)
|
|
{
|
|
fh->handle = open (fh->ino->localname, NO_LINEAR (flags), mode);
|
|
if (fh->handle == -1)
|
|
{
|
|
g_free (fh);
|
|
path_element->class->verrno = errno;
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* i.e. we had no open files and now we have one */
|
|
vfs_rmstamp (path_element->class, (vfsid) super);
|
|
super->fd_usage++;
|
|
fh->ino->st.st_nlink++;
|
|
return fh;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
int
|
|
vfs_s_retrieve_file (struct vfs_class *me, struct vfs_s_inode *ino)
|
|
{
|
|
/* If you want reget, you'll have to open file with O_LINEAR */
|
|
off_t total = 0;
|
|
char buffer[8192];
|
|
int handle, n;
|
|
off_t stat_size = ino->st.st_size;
|
|
vfs_file_handler_t fh;
|
|
vfs_path_t *tmp_vpath;
|
|
|
|
if ((MEDATA->flags & VFS_S_USETMP) == 0)
|
|
return -1;
|
|
|
|
memset (&fh, 0, sizeof (fh));
|
|
|
|
fh.ino = ino;
|
|
fh.handle = -1;
|
|
|
|
handle = vfs_mkstemps (&tmp_vpath, me->name, ino->ent->name);
|
|
ino->localname = vfs_path_to_str (tmp_vpath);
|
|
vfs_path_free (tmp_vpath);
|
|
if (handle == -1)
|
|
{
|
|
me->verrno = errno;
|
|
goto error_4;
|
|
}
|
|
|
|
if (!MEDATA->linear_start (me, &fh, 0))
|
|
goto error_3;
|
|
|
|
/* Clear the interrupt status */
|
|
tty_got_interrupt ();
|
|
tty_enable_interrupt_key ();
|
|
|
|
while ((n = MEDATA->linear_read (me, &fh, buffer, sizeof (buffer))))
|
|
{
|
|
int t;
|
|
if (n < 0)
|
|
goto error_1;
|
|
|
|
total += n;
|
|
vfs_s_print_stats (me->name, _("Getting file"), ino->ent->name, total, stat_size);
|
|
|
|
if (tty_got_interrupt ())
|
|
goto error_1;
|
|
|
|
t = write (handle, buffer, n);
|
|
if (t != n)
|
|
{
|
|
if (t == -1)
|
|
me->verrno = errno;
|
|
goto error_1;
|
|
}
|
|
}
|
|
MEDATA->linear_close (me, &fh);
|
|
close (handle);
|
|
|
|
tty_disable_interrupt_key ();
|
|
g_free (fh.data);
|
|
return 0;
|
|
|
|
error_1:
|
|
MEDATA->linear_close (me, &fh);
|
|
error_3:
|
|
tty_disable_interrupt_key ();
|
|
close (handle);
|
|
unlink (ino->localname);
|
|
error_4:
|
|
g_free (ino->localname);
|
|
ino->localname = NULL;
|
|
g_free (fh.data);
|
|
return -1;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
/* ----------------------------- Stamping support -------------------------- */
|
|
|
|
/* Initialize one of our subclasses - fill common functions */
|
|
void
|
|
vfs_s_init_class (struct vfs_class *vclass, struct vfs_s_subclass *sub)
|
|
{
|
|
vclass->data = sub;
|
|
vclass->fill_names = vfs_s_fill_names;
|
|
vclass->open = vfs_s_open;
|
|
vclass->close = vfs_s_close;
|
|
vclass->read = vfs_s_read;
|
|
if (!(sub->flags & VFS_S_READONLY))
|
|
{
|
|
vclass->write = vfs_s_write;
|
|
}
|
|
vclass->opendir = vfs_s_opendir;
|
|
vclass->readdir = vfs_s_readdir;
|
|
vclass->closedir = vfs_s_closedir;
|
|
vclass->stat = vfs_s_stat;
|
|
vclass->lstat = vfs_s_lstat;
|
|
vclass->fstat = vfs_s_fstat;
|
|
vclass->readlink = vfs_s_readlink;
|
|
vclass->chdir = vfs_s_chdir;
|
|
vclass->ferrno = vfs_s_ferrno;
|
|
vclass->lseek = vfs_s_lseek;
|
|
vclass->getid = vfs_s_getid;
|
|
vclass->nothingisopen = vfs_s_nothingisopen;
|
|
vclass->free = vfs_s_free;
|
|
if ((sub->flags & VFS_S_USETMP) != 0)
|
|
{
|
|
vclass->getlocalcopy = vfs_s_getlocalcopy;
|
|
vclass->ungetlocalcopy = vfs_s_ungetlocalcopy;
|
|
sub->find_entry = vfs_s_find_entry_linear;
|
|
}
|
|
else if ((sub->flags & VFS_S_REMOTE) != 0)
|
|
sub->find_entry = vfs_s_find_entry_linear;
|
|
else
|
|
sub->find_entry = vfs_s_find_entry_tree;
|
|
vclass->setctl = vfs_s_setctl;
|
|
sub->dir_uptodate = vfs_s_dir_uptodate;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
/** Find VFS id for given directory name */
|
|
|
|
vfsid
|
|
vfs_getid (const vfs_path_t * vpath)
|
|
{
|
|
const vfs_path_element_t *path_element;
|
|
|
|
path_element = vfs_path_get_by_index (vpath, -1);
|
|
if (!vfs_path_element_valid (path_element) || path_element->class->getid == NULL)
|
|
return NULL;
|
|
|
|
return (*path_element->class->getid) (vpath);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
/* ----------- Utility functions for networked filesystems -------------- */
|
|
|
|
#ifdef ENABLE_VFS_NET
|
|
int
|
|
vfs_s_select_on_two (int fd1, int fd2)
|
|
{
|
|
fd_set set;
|
|
struct timeval time_out;
|
|
int v;
|
|
int maxfd = (fd1 > fd2 ? fd1 : fd2) + 1;
|
|
|
|
time_out.tv_sec = 1;
|
|
time_out.tv_usec = 0;
|
|
FD_ZERO (&set);
|
|
FD_SET (fd1, &set);
|
|
FD_SET (fd2, &set);
|
|
v = select (maxfd, &set, 0, 0, &time_out);
|
|
if (v <= 0)
|
|
return v;
|
|
if (FD_ISSET (fd1, &set))
|
|
return 1;
|
|
if (FD_ISSET (fd2, &set))
|
|
return 2;
|
|
return -1;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
int
|
|
vfs_s_get_line (struct vfs_class *me, int sock, char *buf, int buf_len, char term)
|
|
{
|
|
FILE *logfile = MEDATA->logfile;
|
|
int i;
|
|
char c;
|
|
|
|
for (i = 0; i < buf_len - 1; i++, buf++)
|
|
{
|
|
if (read (sock, buf, sizeof (char)) <= 0)
|
|
return 0;
|
|
if (logfile)
|
|
{
|
|
size_t ret1;
|
|
int ret2;
|
|
ret1 = fwrite (buf, 1, 1, logfile);
|
|
ret2 = fflush (logfile);
|
|
}
|
|
if (*buf == term)
|
|
{
|
|
*buf = 0;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/* Line is too long - terminate buffer and discard the rest of line */
|
|
*buf = 0;
|
|
while (read (sock, &c, sizeof (c)) > 0)
|
|
{
|
|
if (logfile)
|
|
{
|
|
size_t ret1;
|
|
int ret2;
|
|
ret1 = fwrite (&c, 1, 1, logfile);
|
|
ret2 = fflush (logfile);
|
|
}
|
|
if (c == '\n')
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
|
|
int
|
|
vfs_s_get_line_interruptible (struct vfs_class *me, char *buffer, int size, int fd)
|
|
{
|
|
int n;
|
|
int i;
|
|
|
|
(void) me;
|
|
|
|
tty_enable_interrupt_key ();
|
|
for (i = 0; i < size - 1; i++)
|
|
{
|
|
n = read (fd, buffer + i, 1);
|
|
tty_disable_interrupt_key ();
|
|
if (n == -1 && errno == EINTR)
|
|
{
|
|
buffer[i] = 0;
|
|
return EINTR;
|
|
}
|
|
if (n == 0)
|
|
{
|
|
buffer[i] = 0;
|
|
return 0;
|
|
}
|
|
if (buffer[i] == '\n')
|
|
{
|
|
buffer[i] = 0;
|
|
return 1;
|
|
}
|
|
}
|
|
buffer[size - 1] = 0;
|
|
return 0;
|
|
}
|
|
#endif /* ENABLE_VFS_NET */
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|
|
/**
|
|
* Normalize filenames start position
|
|
*/
|
|
|
|
void
|
|
vfs_s_normalize_filename_leading_spaces (struct vfs_s_inode *root_inode, size_t final_num_spaces)
|
|
{
|
|
GList *iter;
|
|
|
|
for (iter = root_inode->subdir; iter != NULL; iter = g_list_next (iter))
|
|
{
|
|
struct vfs_s_entry *entry = (struct vfs_s_entry *) iter->data;
|
|
if ((size_t) entry->ino->data_offset > final_num_spaces)
|
|
{
|
|
char *source_name = entry->name;
|
|
char *spacer = g_strnfill (entry->ino->data_offset - final_num_spaces, ' ');
|
|
entry->name = g_strdup_printf ("%s%s", spacer, source_name);
|
|
g_free (spacer);
|
|
g_free (source_name);
|
|
}
|
|
entry->ino->data_offset = -1;
|
|
}
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------------------------- */
|