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39ad0b489a
mc/vfs/vfs.c
Norbert Warmuth 39ad0b489a Thu May 28 16:42:31 1998 Pavel Machek <pavel@bug.mj.gts.cz> 
* extfs.c, shared.c, tar.c: I changed semantics in my previous
	patch - _get_path() now modifies strings passed to it. I thought
	that I were carefull enough not to introduce bugs. You guessed it -
	I was not. [Many tar_ and extfs_ functions modify strings passed
	to them, but as they are only called from vfs layer, it does not
	matter much.]
	So I renamed function to alert everyone that semantics changed.

	Fixed bugs in timestamping (and segfaults) when you entered tar
	inside zip file or similar.

	* vfs.c (mc_open): Die if the filesystem doesn't support open
1998-05-31 20:12:35 +00:00

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/* Virtual File System switch code
Copyright (C) 1995 The Free Software Foundation
Written by: 1995 Miguel de Icaza
1995 Jakub Jelinek
1998 Pavel Machek
This program 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 of the License, or
(at your option) any later version.
This program 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. */
#define _VFS_VFS_C 1
#include <config.h>
#include <stdio.h>
#include <stdlib.h> /* For atol() */
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <malloc.h>
#include <fcntl.h>
#include <signal.h>
#ifdef SCO_FLAVOR
#include <sys/timeb.h> /* alex: for struct timeb definition */
#endif /* SCO_FLAVOR */
#include <time.h>
#include <sys/time.h>
#include "../src/fs.h"
#include "../src/mad.h"
#include "../src/dir.h"
#include "../src/util.h"
#include "../src/main.h"
#ifndef VFS_STANDALONE
#include "../src/panel.h"
#include "../src/key.h" /* Required for the async alarm handler */
#include "../src/layout.h" /* For get_panel_widget and get_other_index */
#endif
#include "vfs.h"
#include "mcfs.h"
#include "names.h"
#include "extfs.h"
#ifdef USE_NETCODE
# include "tcputil.h"
#endif
extern int get_other_type (void);
extern int extfs_which (char *path);
int vfs_timeout = 60; /* VFS timeout in seconds */
extern int cd_symlinks; /* Defined in main.c */
/* They keep track of the current directory */
static vfs *current_vfs = &local_vfs_ops;
char *current_dir = NULL;
static int current_mon;
static int current_year;
/* Open files managed by the vfs layer */
#define MAX_VFS_FILES 100
static struct {
void *fs_info;
vfs *operations;
} vfs_file_table [MAX_VFS_FILES];
static int get_bucket ()
{
int i;
/* 0, 1, 2 are reserved file descriptors, while (DIR *) 0 means error */
for (i = 3; i < MAX_VFS_FILES; i++){
if (!vfs_file_table [i].fs_info)
return i;
}
fprintf (stderr, "No more virtual file handles\n");
exit (1);
}
vfs *vfs_type_from_op (char *path)
{
#ifdef USE_NETCODE
if (!strncmp (path, "mc:", 3))
return &mcfs_vfs_ops;
if (!strncmp (path, "ftp:", 4))
return &ftpfs_vfs_ops;
#endif
#ifdef USE_EXT2FSLIB
if (!strcmp (path, "undel"))
return &undelfs_vfs_ops;
#endif
if (!strcmp (path, "utar"))
return &tarfs_vfs_ops;
if (extfs_which (path) != -1)
return &extfs_vfs_ops;
return NULL;
}
/*
* Splits path '/p1:op/inpath' into inpath,op; returns which vfs it is.
* What is left in path is p1. You still want to free(path), you DON'T
* want to free neither *inpath nor *op
*/
vfs *vfs_split (char *path, char **inpath, char **op)
{
char *semi = strrchr (path, '#');
char *slash;
vfs *ret;
if (!semi)
return NULL;
slash = strchr (semi, '/');
*semi = 0;
if (op)
*op = NULL;
if (inpath)
*inpath = NULL;
if (slash)
*slash = 0;
if ((ret = vfs_type_from_op (semi+1))){
if (op)
*op = semi+1;
if (inpath)
*inpath = slash?slash+1:NULL;
return ret;
}
if (slash)
*slash = '/';
ret = vfs_split (path, inpath, op);
*semi = '#';
return ret;
}
vfs*
vfs_rosplit (char *path)
{
char *semi = strrchr (path, '#');
char *slash;
vfs *ret;
if (!semi)
return NULL;
slash = strchr (semi, '/');
*semi = 0;
if (slash)
*slash = 0;
ret = vfs_type_from_op (semi+1);
if (slash)
*slash = '/';
if (!ret)
ret = vfs_rosplit (path);
*semi = '#';
return ret;
}
vfs *vfs_type (char *path)
{
vfs *vfs = vfs_rosplit(path);
if (!vfs)
vfs = &local_vfs_ops;
return vfs;
}
static struct vfs_stamping *stamps;
/* Returns the number of seconds remaining to the vfs timeout
*
* FIXME: currently this is set to 10 seconds. We should compute this.
*/
int vfs_timeouts ()
{
return stamps ? 10 : 0;
}
void vfs_addstamp (vfs *v, vfsid id, struct vfs_stamping *parent)
{
if (v != &local_vfs_ops && id != (vfsid)-1){
struct vfs_stamping *stamp, *st1;
for (stamp = stamps; stamp != NULL; st1 = stamp, stamp = stamp->next)
if (stamp->v == v && stamp->id == id){
gettimeofday(&(stamp->time), NULL);
return;
}
stamp = xmalloc (sizeof (struct vfs_stamping), "vfs stamping");
stamp->v = v;
stamp->id = id;
if (parent){
struct vfs_stamping *st = stamp;
for (; parent;){
st->parent = xmalloc (sizeof (struct vfs_stamping), "vfs stamping");
*st->parent = *parent;
parent = parent->parent;
st = st->parent;
}
st->parent = 0;
}
else
stamp->parent = 0;
gettimeofday (&(stamp->time), NULL);
stamp->next = 0;
if (stamps)
st1->next = stamp;
else
stamps = stamp;
}
}
void vfs_stamp (vfs *v, vfsid id)
{
struct vfs_stamping *stamp;
for (stamp = stamps; stamp != NULL; stamp = stamp->next)
if (stamp->v == v && stamp->id == id){
gettimeofday (&(stamp->time), NULL);
if (stamp->parent != NULL)
vfs_stamp (stamp->parent->v, stamp->parent->id);
return;
}
}
void vfs_rm_parents (struct vfs_stamping *stamp)
{
struct vfs_stamping *st2, *st3;
if (stamp){
for (st2 = stamp, st3 = st2->parent; st3 != NULL; st2 = st3, st3 = st3->parent)
free (st2);
free (st2);
}
}
void vfs_rmstamp (vfs *v, vfsid id, int removeparents)
{
struct vfs_stamping *stamp, *st1;
for (stamp = stamps, st1 = NULL; stamp != NULL; st1 = stamp, stamp = stamp->next)
if (stamp->v == v && stamp->id == id){
if (stamp->parent != NULL){
if (removeparents)
vfs_rmstamp (stamp->parent->v, stamp->parent->id, 1);
vfs_rm_parents (stamp->parent);
}
if (st1 == NULL){
stamps = stamp->next;
} else {
st1->next = stamp->next;
}
free (stamp);
return;
}
}
static int
ferrno (vfs *vfs)
{
return vfs->ferrno ? (*vfs->ferrno)() : EOPNOTSUPP;
/* Hope that error message is obscure enough ;-) */
}
int mc_open (char *file, int flags, ...)
{
int handle;
int mode;
void *info;
vfs *vfs;
va_list ap;
file = vfs_canon (file);
vfs = vfs_type (file);
/* Get the mode flag */ /* FIXME: should look if O_CREAT is present */
va_start (ap, flags);
mode = va_arg (ap, int);
va_end (ap);
if (!vfs->open)
vfs_die( "VFS must support open\n" );
info = (*vfs->open) (file, flags, mode); /* open must be supported */
free (file);
if (!info){
errno = ferrno (vfs);
return -1;
}
handle = get_bucket ();
vfs_file_table [handle].fs_info = info;
vfs_file_table [handle].operations = vfs;
return handle;
}
#define vfs_op(handle) vfs_file_table [handle].operations
#define vfs_info(handle) vfs_file_table [handle].fs_info
#define vfs_free_bucket(handle) vfs_info(handle) = 0;
#define MC_OP(name, inarg, callarg, pre, post) \
int mc_##name inarg \
{ \
vfs *vfs; \
int result; \
\
pre \
result = vfs->name ? (*vfs->name)callarg : -1; \
post \
if (result == -1) \
errno = ferrno (vfs); \
return result; \
}
#define MC_NAMEOP(name, inarg, callarg) MC_OP (name, inarg, callarg, path = vfs_canon (path); vfs = vfs_type (path);, free (path); )
#define MC_HANDLEOP(name, inarg, callarg) MC_OP (name, inarg, callarg, if (handle == -1) return -1; vfs = vfs_op (handle);, )
MC_HANDLEOP(read, (int handle, char *buffer, int count), (vfs_info (handle), buffer, count) );
int mc_ctl (int handle, int ctlop, int arg)
{
vfs *vfs;
int result;
vfs = vfs_op (handle);
result = vfs->ctl ? (*vfs->ctl)(vfs_info (handle), ctlop, arg) : 0;
return result;
}
int mc_setctl (char *path, int ctlop, char *arg)
{
vfs *vfs;
int result;
path = vfs_canon (path);
vfs = vfs_type (path);
result = vfs->setctl ? (*vfs->setctl)(path, ctlop, arg) : 0;
free (path);
return result;
}
int mc_close (int handle)
{
vfs *vfs;
int result;
if (handle == -1 || !vfs_info (handle))
return -1;
vfs = vfs_op (handle);
if (handle < 3)
return close (handle);
result = (*vfs->close)(vfs_info (handle)); /* close must be supported */
vfs_free_bucket (handle);
if (result == -1)
errno = ferrno (vfs);
return result;
}
DIR *mc_opendir (char *dirname)
{
int handle, *handlep;
void *info;
vfs *vfs;
char *p = NULL;
int i = strlen (dirname);
if (dirname [i - 1] != '/'){
/* We should make possible reading of the root directory in a tar file */
p = xmalloc (i + 2, "slash");
strcpy (p, dirname);
strcpy (p + i, "/");
dirname = p;
}
dirname = vfs_canon (dirname);
vfs = vfs_type (dirname);
info = vfs->opendir ? (*vfs->opendir)(dirname) : NULL;
free (dirname);
if (!info){
errno = ferrno (vfs);
if (p)
free (p);
return NULL;
}
handle = get_bucket ();
vfs_file_table [handle].fs_info = info;
vfs_file_table [handle].operations = vfs;
if (p)
free (p);
handlep = (int *) xmalloc (sizeof (int), "opendir handle");
*handlep = handle;
return (DIR *) handlep;
}
/* This should strip the non needed part of a path name */
#define vfs_name(x) x
#define MC_DIROP(name, type, inarg, callarg, onerr ) \
type mc_##name inarg \
{ \
int handle; \
vfs *vfs; \
\
if (!dirp){ \
errno = EFAULT; \
return onerr; \
} \
handle = *(int *) dirp; \
vfs = vfs_op (handle); \
return vfs->name ? (*vfs->name) callarg : onerr; \
}
#define MC_DIROP_VOID(name, inarg, callarg ) \
void mc_##name inarg \
{ \
int handle; \
vfs *vfs; \
\
if (!dirp){ \
errno = EFAULT; \
return; \
} \
handle = *(int *) dirp; \
vfs = vfs_op (handle); \
if (vfs->name) \
(*vfs->name) callarg; \
}
MC_DIROP (readdir, struct dirent *, (DIR *dirp), (vfs_info (handle)), NULL)
MC_DIROP_VOID (seekdir, (DIR *dirp, int offset), (vfs_info (handle), offset))
MC_DIROP (telldir, int, (DIR *dirp), (vfs_info (handle)), -1)
int mc_closedir (DIR *dirp)
{
int handle = *(int *) dirp;
vfs *vfs = vfs_op (handle);
int result;
result = vfs->closedir ? (*vfs->closedir)(vfs_info (handle)) : -1;
vfs_free_bucket (handle);
free (dirp);
return result;
}
MC_NAMEOP (stat, (char *path, struct stat *buf), (vfs_name (path), buf))
MC_NAMEOP (lstat, (char *path, struct stat *buf), (vfs_name (path), buf))
MC_HANDLEOP (fstat, (int handle, struct stat *buf), (vfs_info (handle), buf))
/*
* You must strdup whatever this function returns, static buffers are in use
*/
char *mc_return_cwd (void)
{
char *p;
struct stat my_stat, my_stat2;
if (!vfs_rosplit (current_dir)){
static char buffer[MC_MAXPATHLEN];
p = get_current_wd (buffer, MC_MAXPATHLEN);
if (!p) /* One of the directories in the path is not readable */
return current_dir;
/* Otherwise check if it is O.K. to use the current_dir */
mc_stat (p, &my_stat);
mc_stat (current_dir, &my_stat2);
if (my_stat.st_ino != my_stat2.st_ino ||
my_stat.st_dev != my_stat2.st_dev ||
!cd_symlinks){
free (current_dir);
current_dir = strdup (p);
return p;
} /* Otherwise we return current_dir below */
}
return current_dir;
}
char *mc_get_current_wd (char *buffer, int size)
{
char *cwd = mc_return_cwd();
if (strlen (cwd) > size){
vfs_die ("Current_dir size overflow\n");
}
strcpy (buffer, cwd);
return buffer;
}
MC_NAMEOP (chmod, (char *path, int mode), (vfs_name (path), mode))
MC_NAMEOP (chown, (char *path, int owner, int group), (vfs_name (path), owner, group))
MC_NAMEOP (utime, (char *path, struct utimbuf *times), (vfs_name (path), times))
MC_NAMEOP (readlink, (char *path, char *buf, int bufsiz), (vfs_name (path), buf, bufsiz))
MC_NAMEOP (unlink, (char *path), (vfs_name (path)))
MC_NAMEOP (symlink, (char *name1, char *path), (vfs_name (name1), vfs_name (path)))
int mc_link (char *name1, char *name2)
{
vfs *vfs1;
vfs *vfs2;
int result;
name1 = vfs_canon (name1);
vfs1 = vfs_type (name1);
name2 = vfs_canon (name2);
vfs2 = vfs_type (name2);
if (vfs1 != vfs2){
errno = EXDEV;
free (name1);
free (name2);
return -1;
}
result = (*vfs1->link)(vfs_name (name1), vfs_name (name2));
free (name1);
free (name2);
if (result == -1){
errno = (*vfs1->ferrno)();
return -1;
}
return result;
}
MC_HANDLEOP (write, (int handle, char *buf, int nbyte), (vfs_info (handle), buf, nbyte));
int mc_rename (char *path1, char *path2)
{
vfs *vfs1;
vfs *vfs2;
int result;
path1 = vfs_canon (path1);
vfs1 = vfs_type (path1);
path2 = vfs_canon (path2);
vfs2 = vfs_type (path2);
if (vfs1 != vfs2){
errno = EXDEV;
free (path1);
free (path2);
return -1;
}
result = (*vfs1->rename)(vfs_name (path1), vfs_name (path2));
free (path1);
free (path2);
if (result == -1){
errno = (*vfs1->ferrno)();
return -1;
}
return result;
}
off_t mc_lseek (int fd, off_t offset, int whence)
{
vfs *vfs;
if (fd == -1)
return -1;
vfs = vfs_op (fd);
return (*vfs->lseek)(vfs_info (fd), offset, whence);
}
/*
* remove //, /./ and /../, local should point to big enough buffer
*/
#define ISSLASH(a) (!a || (a == '/'))
void
vfs_kill_dots (char *path, char *local)
{
char *s = path, *t = local;
char *last_slash = path;
*t++ = *s++;
while (1){
if (ISSLASH (*s)){
if (*last_slash != '/')
vfs_die ("/ not there\n");
if (ISSLASH (last_slash [1]))
t--;
if (last_slash [1] == '.'){
if (ISSLASH(last_slash [2]))
t -= 2;
if ((last_slash [2] == '.') && (ISSLASH (last_slash [3]))){
t -= 4;
while ((t >= local) && (*t != '/'))
t--;
}
}
last_slash = s;
}
if (t <= local){
*local = '/';
t = local;
}
if (!*s)
break;
*t++ = *s++;
*t = 0;
}
*t = 0;
if (!(*local)){
local [0] = '/';
local [1] = 0;
}
}
char *vfs_canon (char *path)
{
if (*path == '~'){ /* Tilde expansion */
char *local, *result;
local = tilde_expand (path);
if (local){
result = vfs_canon (local);
free (local);
return result;
} else
return strdup (path);
}
if (*path != '/'){ /* Relative to current directory */
char *local, *result;
if (current_dir [strlen (current_dir) - 1] == '/')
local = copy_strings (current_dir, path, NULL);
else
local = copy_strings (current_dir, "/", path, NULL);
result = vfs_canon (local);
free (local);
return result;
}
/* So we have path of following form:
* /p1/p2:op/.././././p3:op/p4. Good luck.
*/
canonicalize_pathname (path);
return strdup (path);
}
vfsid vfs_ncs_getid (vfs *nvfs, char *dir, struct vfs_stamping **par)
{
vfsid nvfsid;
int freeit = 0;
if (dir [strlen (dir) - 1] != '/'){
dir = copy_strings (dir, "/", NULL);
freeit = 1;
}
nvfsid = (*nvfs->getid)(dir, par);
if (freeit)
free (dir);
return nvfsid;
}
#ifndef VFS_STANDALONE
static int is_parent (vfs * nvfs, vfsid nvfsid, struct vfs_stamping *parent)
{
struct vfs_stamping *stamp;
for (stamp = parent; stamp; stamp = stamp->parent)
if (stamp->v == nvfs && stamp->id == nvfsid)
break;
return (stamp ? 1 : 0);
}
#endif
void vfs_add_noncurrent_stamps (vfs * oldvfs, vfsid oldvfsid, struct vfs_stamping *parent)
{
#ifndef VFS_STANDALONE
vfs *nvfs, *n2vfs, *n3vfs;
vfsid nvfsid, n2vfsid, n3vfsid;
struct vfs_stamping *par, *stamp;
int f;
/* FIXME: As soon as we convert to multiple panels, this stuff
has to change. It works like this: We do not time out the
vfs's which are current in any panel and on the other
side we add the old directory with all its parents which
are not in any panel (if we find such one, we stop adding
parents to the time-outing structure. */
/* There are three directories we have to take care of: current_dir,
cpanel->cwd and opanel->cwd. Athough most of the time either
current_dir and cpanel->cwd or current_dir and opanel->cwd are the
same, it's possible that all three are different -- Norbert */
if (!cpanel)
return;
nvfs = vfs_type (current_dir);
nvfsid = vfs_ncs_getid (nvfs, current_dir, &par);
vfs_rmstamp (nvfs, nvfsid, 1);
f = is_parent (oldvfs, oldvfsid, par);
vfs_rm_parents (par);
if ((nvfs == oldvfs && nvfs == oldvfsid) || oldvfsid == (vfsid *)-1 || f){
return;
}
if (get_current_type () == view_listing){
n2vfs = vfs_type (cpanel->cwd);
n2vfsid = vfs_ncs_getid (n2vfs, cpanel->cwd, &par);
f = is_parent (oldvfs, oldvfsid, par);
vfs_rm_parents (par);
if ((n2vfs == oldvfs && n2vfsid == oldvfsid) || f)
return;
} else {
n2vfs = (vfs *) -1;
n2vfsid = (vfs *) -1;
}
if (get_other_type () == view_listing){
n3vfs = vfs_type (opanel->cwd);
n3vfsid = vfs_ncs_getid (n3vfs, opanel->cwd, &par);
f = is_parent (oldvfs, oldvfsid, par);
vfs_rm_parents (par);
if ((n3vfs == oldvfs && n3vfsid == oldvfsid) || f)
return;
} else {
n3vfs = (vfs *)-1;
n3vfsid = (vfs *)-1;
}
if ((*oldvfs->nothingisopen) (oldvfsid)){
if (oldvfs == &extfs_vfs_ops && ((struct extfs_archive *) oldvfsid)->name == 0){
/* Free the resources immediatly when we leave a mtools fs
('cd a:') instead of waiting for the vfs-timeout */
(oldvfs->free) (oldvfsid);
} else
vfs_addstamp (oldvfs, oldvfsid, parent);
for (stamp = parent; stamp != NULL; stamp = stamp->parent){
if ((stamp->v == nvfs && stamp->id == nvfsid) ||
(stamp->v == n2vfs && stamp->id == n2vfsid) ||
(stamp->v == n3vfs && stamp->id == n3vfsid) ||
stamp->id == (vfsid) - 1 ||
!(*stamp->v->nothingisopen) (stamp->id))
break;
if (stamp->v == &extfs_vfs_ops && ((struct extfs_archive *) stamp->id)->name == 0){
(stamp->v->free) (stamp->id);
vfs_rmstamp (stamp->v, stamp->id, 0);
} else
vfs_addstamp (stamp->v, stamp->id, stamp->parent);
}
}
#endif
}
#ifndef VFS_STANDALONE
static void vfs_stamp_path (char *path)
{
vfs *vfs;
vfsid id;
struct vfs_stamping *par, *stamp;
vfs = vfs_type (path);
id = vfs_ncs_getid (vfs, path, &par);
vfs_addstamp (vfs, id, par);
for (stamp = par; stamp != NULL; stamp = stamp->parent)
vfs_addstamp (stamp->v, stamp->id, stamp->parent);
vfs_rm_parents (par);
}
#endif
#ifndef VFS_STANDALONE
void vfs_add_current_stamps (void)
{
vfs_stamp_path (current_dir);
if (get_current_type () == view_listing)
vfs_stamp_path (cpanel->cwd);
if (get_other_type () == view_listing)
vfs_stamp_path (opanel->cwd);
}
#endif
/* This function is really broken */
int mc_chdir (char *path)
{
char *a, *b;
int result;
char *p = NULL;
int i = strlen (path);
vfs *oldvfs;
vfsid oldvfsid;
struct vfs_stamping *parent;
if (path [i - 1] != '/'){
/* We should make possible reading of the root directory in a tar archive */
p = xmalloc (i + 2, "slash");
strcpy (p, path);
strcpy (p + i, "/");
path = p;
}
a = current_dir; /* Save a copy for case of failure */
current_dir = vfs_canon (path);
current_vfs = vfs_type (current_dir);
b = strdup (current_dir);
result = (*current_vfs->chdir)(vfs_name (b));
free (b);
if (result == -1){
errno = (*current_vfs->ferrno)();
free (current_dir);
current_vfs = vfs_type (a);
current_dir = a;
} else {
oldvfs = vfs_type (a);
oldvfsid = vfs_ncs_getid (oldvfs, a, &parent);
free (a);
vfs_add_noncurrent_stamps (oldvfs, oldvfsid, parent);
vfs_rm_parents (parent);
}
if (p)
free (p);
if (*current_dir){
p = strchr (current_dir, 0) - 1;
if (*p == '/' && p > current_dir)
*p = 0; /* Sometimes we assume no trailing slash on cwd */
}
return result;
}
int vfs_current_is_local (void)
{
return current_vfs == &local_vfs_ops;
}
int vfs_current_is_extfs (void)
{
return current_vfs == &extfs_vfs_ops;
}
int vfs_current_is_tarfs (void)
{
return current_vfs == &tarfs_vfs_ops;
}
int vfs_file_is_local (char *filename)
{
vfs *vfs;
filename = vfs_canon (filename);
vfs = vfs_type (filename);
free (filename);
return vfs == &local_vfs_ops;
}
int vfs_file_is_ftp (char *filename)
{
#ifdef USE_NETCODE
vfs *vfs;
filename = vfs_canon (filename);
vfs = vfs_type (filename);
free (filename);
return vfs == &ftpfs_vfs_ops;
#else
return 0;
#endif
}
char *vfs_get_current_dir (void)
{
return current_dir;
}
void vfs_setup_wd (void)
{
current_dir = strdup ("/");
mc_return_cwd(); /* mc_return_cwd will fixup current_dir for us */
if (strlen(current_dir)>MC_MAXPATHLEN-2)
vfs_die ("Current dir too long\n");
return;
}
MC_NAMEOP (mkdir, (char *path, mode_t mode), (vfs_name (path), mode))
MC_NAMEOP (rmdir, (char *path), (vfs_name (path)))
MC_NAMEOP (mknod, (char *path, int mode, int dev), (vfs_name (path), mode, dev))
#ifdef HAVE_MMAP
struct mc_mmapping {
caddr_t addr;
void *vfs_info;
vfs *vfs;
struct mc_mmapping *next;
} *mc_mmaparray = NULL;
caddr_t
mc_mmap (caddr_t addr, size_t len, int prot, int flags, int fd, off_t offset)
{
vfs *vfs;
caddr_t result;
struct mc_mmapping *mcm;
if (fd == -1)
return (caddr_t) -1;
vfs = vfs_op (fd);
result = (*vfs->mmap)(addr, len, prot, flags, vfs_info (fd), offset);
if (result == (caddr_t)-1){
errno = (*vfs->ferrno)();
return (caddr_t)-1;
}
mcm = (struct mc_mmapping *) xmalloc (sizeof (struct mc_mmapping), "vfs: mmap handling");
mcm->addr = result;
mcm->vfs_info = vfs_info (fd);
mcm->vfs = vfs;
mcm->next = mc_mmaparray;
mc_mmaparray = mcm;
return result;
}
int mc_munmap (caddr_t addr, size_t len)
{
struct mc_mmapping *mcm, *mcm2 = NULL;
for (mcm = mc_mmaparray; mcm != NULL; mcm2 = mcm, mcm = mcm->next){
if (mcm->addr == addr){
if (mcm2 == NULL)
mc_mmaparray = mcm->next;
else
mcm2->next = mcm->next;
(*mcm->vfs->munmap)(addr, len, mcm->vfs_info);
free (mcm);
return 0;
}
}
return -1;
}
#endif
char *mc_def_getlocalcopy (char *filename)
{
char *tmp;
int fdin, fdout, i;
char buffer[8192];
struct stat mystat;
fdin = mc_open (filename, O_RDONLY);
if (fdin == -1)
return NULL;
tmp = tmpnam(NULL);
fdout = creat (tmp, 0600); /* FIXME: What about symlink attack ? */
if (fdout == -1){
mc_close (fdin);
return NULL;
}
tmp = strdup (tmp);
while ((i = mc_read (fdin, buffer, sizeof (buffer))) == sizeof (buffer)){
write (fdout, buffer, i);
}
if (i != -1)
write (fdout, buffer, i);
mc_close (fdin);
close (fdout);
if (mc_stat (filename, &mystat) != -1){
chmod (tmp, mystat.st_mode);
}
return tmp;
}
char *mc_getlocalcopy (char *path)
{
vfs *vfs;
char *result;
path = vfs_canon (path);
vfs = vfs_type (path);
result = vfs->getlocalcopy ? (*vfs->getlocalcopy)(vfs_name (path)) :
mc_def_getlocalcopy (vfs_name (path));
free (path);
if (result == NULL){
errno = ferrno (vfs);
}
return result;
}
void mc_def_ungetlocalcopy (char *filename, char *local, int has_changed)
{
if (has_changed){
int fdin, fdout, i;
char buffer [8192];
fdin = open (local, O_RDONLY);
if (fdin == -1){
unlink (local);
free (local);
return;
}
fdout = mc_open (filename, O_WRONLY | O_TRUNC);
if (fdout == -1){
close (fdin);
unlink (local);
free (local);
return;
}
while ((i = read (fdin, buffer, sizeof (buffer))) == sizeof (buffer)){
mc_write (fdout, buffer, i);
}
if (i != -1)
mc_write (fdout, buffer, i);
close (fdin);
mc_close (fdout);
}
unlink (local);
free (local);
}
void mc_ungetlocalcopy (char *path, char *local, int has_changed)
{
vfs *vfs;
path = vfs_canon (path);
vfs = vfs_type (path);
vfs->ungetlocalcopy ? (*vfs->ungetlocalcopy)(vfs_name (path), local, has_changed) :
mc_def_ungetlocalcopy (vfs_name (path), local, has_changed);
free (path);
}
inline int timeoutcmp (struct timeval *t1, struct timeval *t2)
{
return ((t1->tv_sec < t2->tv_sec)
|| ((t1->tv_sec == t2->tv_sec) && (t1->tv_usec <= t2->tv_usec)));
}
void vfs_timeout_handler (void)
{
struct timeval time;
struct vfs_stamping *stamp, *st;
gettimeofday (&time, NULL);
time.tv_sec -= vfs_timeout;
for (stamp = stamps; stamp != NULL;){
if (timeoutcmp (&stamp->time, &time)){
st = stamp->next;
(*stamp->v->free) (stamp->id);
vfs_rmstamp (stamp->v, stamp->id, 0);
stamp = st;
} else
stamp = stamp->next;
}
}
void vfs_init (void)
{
time_t current_time;
struct tm *t;
memset (vfs_file_table, 0, sizeof (vfs_file_table));
current_time = time (NULL);
t = localtime (&current_time);
current_mon = t->tm_mon;
current_year = t->tm_year;
#ifdef USE_NETCODE
tcp_init();
ftpfs_init();
#endif
extfs_init ();
vfs_setup_wd ();
}
void vfs_free_resources (char *path)
{
vfs *vfs;
vfsid vid;
struct vfs_stamping *parent;
vfs = vfs_type (path);
vid = vfs_ncs_getid (vfs, path, &parent);
if (vid != (vfsid) -1)
(*vfs->free)(vid);
vfs_rm_parents (parent);
}
#if 0
/* Shutdown a vfs given a path name */
void vfs_shut_path (char *p)
{
vfs *the_vfs;
struct vfs_stamping *par;
the_vfs = vfs_type (p);
vfs_ncs_getid (the_vfs, p, &par);
(*par->v->free)(par->id);
vfs_rm_parents (par);
}
#endif
void vfs_shut (void)
{
struct vfs_stamping *stamp, *st;
for (stamp = stamps, stamps = 0; stamp != NULL;){
(*stamp->v->free)(stamp->id);
st = stamp->next;
free (stamp);
stamp = st;
}
if (stamps)
vfs_rmstamp (stamps->v, stamps->id, 1);
if (current_dir)
free (current_dir);
extfs_done ();
#ifdef USE_NETCODE
ftpfs_done();
#endif
}
/* These ones grab information from the VFS
* and handles them to an upper layer
*/
void vfs_fill_names (void (*func)(char *))
{
#ifdef USE_NETCODE
mcfs_fill_names (func);
ftpfs_fill_names (func);
#endif
tarfs_fill_names (func);
extfs_fill_names (func);
}
/* Following stuff (parse_ls_lga) is used by ftpfs and extfs */
#define MAXCOLS 30
static char *columns [MAXCOLS]; /* Points to the string in column n */
static int column_ptr [MAXCOLS]; /* Index from 0 to the starting positions of the columns */
static int split_text (char *p)
{
char *original = p;
int numcols;
for (numcols = 0; *p && numcols < MAXCOLS; numcols++){
while (*p == ' ' || *p == '\r' || *p == '\n'){
*p = 0;
p++;
}
columns [numcols] = p;
column_ptr [numcols] = p - original;
while (*p && *p != ' ' && *p != '\r' && *p != '\n')
p++;
}
return numcols;
}
static int is_num (int idx)
{
if (columns [idx][0] < '0' || columns [idx][0] > '9')
return 0;
return 1;
}
#define free_and_return(x) { free (p_copy); return (x); }
int parse_ls_lga (char *p, struct stat *s, char **filename, char **linkname)
{
int idx, idx2, num_cols, isconc = 0;
int i;
long l;
struct tm tim;
int extfs_format_date = 0;
int year_supplied = 0;
char *p_copy;
s->st_mode = 0;
if (strncmp (p, "total", 5) == 0){
return 0;
}
switch (*(p++)){
case 'd': s->st_mode |= S_IFDIR; break;
case 'b': s->st_mode |= S_IFBLK; break;
case 'c': s->st_mode |= S_IFCHR; break;
case 'm': s->st_mode |= S_IFREG; break; /* Don't know what it is :-) */
case 'n': s->st_mode |= S_IFREG; break; /* and this as well */
case 'l': s->st_mode |= S_IFLNK; break;
#ifdef IS_IFSOCK
case 's': s->st_mode |= S_IFSOCK; break;
#endif
case 'p': s->st_mode |= S_IFIFO; break;
case '-': s->st_mode |= S_IFREG; break;
case '?': s->st_mode |= S_IFREG; break;
default: return 0;
}
if (*p == '['){
if (strlen (p) <= 8 || p [8] != ']')
return 0;
/* Should parse here the Notwell permissions :) */
if (S_ISDIR (s->st_mode))
s->st_mode |= (S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR | S_IXUSR | S_IXGRP | S_IXOTH);
else
s->st_mode |= (S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR);
p += 9;
} else {
switch (*(p++)){
case 'r': s->st_mode |= 0400; break;
case '-': break;
default: return 0;
}
switch (*(p++)){
case 'w': s->st_mode |= 0200; break;
case '-': break;
default: return 0;
}
switch (*(p++)){
case 'x': s->st_mode |= 0100; break;
case 's': s->st_mode |= 0100 | S_ISUID; break;
case 'S': s->st_mode |= S_ISUID; break;
case '-': break;
default: return 0;
}
switch (*(p++)){
case 'r': s->st_mode |= 0040; break;
case '-': break;
default: return 0;
}
switch (*(p++)){
case 'w': s->st_mode |= 0020; break;
case '-': break;
default: return 0;
}
switch (*(p++)){
case 'x': s->st_mode |= 0010; break;
case 's': s->st_mode |= 0010 | S_ISGID; break;
case 'S': s->st_mode |= S_ISGID; break;
case '-': break;
default: return 0;
}
switch (*(p++)){
case 'r': s->st_mode |= 0004; break;
case '-': break;
default: return 0;
}
switch (*(p++)){
case 'w': s->st_mode |= 0002; break;
case '-': break;
default: return 0;
}
switch (*(p++)){
case 'x': s->st_mode |= 0001; break;
case 't': s->st_mode |= 0001 | S_ISVTX; break;
case 'T': s->st_mode |= S_ISVTX; break;
case '-': break;
default: return 0;
}
}
p_copy = strdup (p);
num_cols = split_text (p);
s->st_nlink = atol (columns [0]);
if (s->st_nlink <= 0)
free_and_return (0);
if (!is_num (1))
s->st_uid = finduid (columns [1]);
else
s->st_uid = (uid_t) atol (columns [1]);
/* Mhm, the ls -lg did not produce a group field */
for (idx = 3; idx <= 5; idx++)
if ((*columns [idx] >= 'A' && *columns [idx] <= 'S' &&
strlen (columns[idx]) == 3) || (strlen (columns[idx])==8 &&
columns [idx][2] == '-' && columns [idx][5] == '-'))
break;
if (idx == 6 || (idx == 5 && !S_ISCHR (s->st_mode) && !S_ISBLK (s->st_mode)))
free_and_return (0);
if (idx < 5){
char *p = strchr(columns [idx - 1], ',');
if (p && p[1] >= '0' && p[1] <= '9')
isconc = 1;
}
if (idx == 3 || (idx == 4 && !isconc && (S_ISCHR(s->st_mode) || S_ISBLK (s->st_mode))))
idx2 = 2;
else {
if (is_num (2))
s->st_gid = (gid_t) atol (columns [2]);
else
s->st_gid = findgid (columns [2]);
idx2 = 3;
}
if (S_ISCHR (s->st_mode) || S_ISBLK (s->st_mode)){
char *p;
if (!is_num (idx2))
free_and_return (0);
#ifdef HAVE_ST_RDEV
s->st_rdev = (atol (columns [idx2]) & 0xff) << 8;
#endif
if (isconc){
p = strchr (columns [idx2], ',');
if (!p || p [1] < '0' || p [1] > '9')
free_and_return (0);
p++;
} else {
p = columns [idx2 + 1];
if (!is_num (idx2+1))
free_and_return (0);
}
#ifdef HAVE_ST_RDEV
s->st_rdev |= (atol (p) & 0xff);
#endif
s->st_size = 0;
} else {
if (!is_num (idx2))
free_and_return (0);
s->st_size = (size_t) atol (columns [idx2]);
#ifdef HAVE_ST_RDEV
s->st_rdev = 0;
#endif
}
p = columns [idx++];
if (!strcmp (p, "Jan"))
tim.tm_mon = 0;
else if (!strcmp (p, "Feb"))
tim.tm_mon = 1;
else if (!strcmp (p, "Mar"))
tim.tm_mon = 2;
else if (!strcmp (p, "Apr"))
tim.tm_mon = 3;
else if (!strcmp (p, "May"))
tim.tm_mon = 4;
else if (!strcmp (p, "Jun"))
tim.tm_mon = 5;
else if (!strcmp (p, "Jul"))
tim.tm_mon = 6;
else if (!strcmp (p, "Aug"))
tim.tm_mon = 7;
else if (!strcmp (p, "Sep"))
tim.tm_mon = 8;
else if (!strcmp (p, "Oct"))
tim.tm_mon = 9;
else if (!strcmp (p, "Nov"))
tim.tm_mon = 10;
else if (!strcmp (p, "Dec"))
tim.tm_mon = 11;
else {
/* This case should not normaly happen, but in extfs we allow these
date formats:
Mon DD hh:mm
Mon DD YYYY
Mon DD YYYY hh:mm
MM-DD-YY hh:mm
where Mon is Jan-Dec, DD, MM, YY two digit day, month, year,
YYYY four digit year, hh, mm two digit hour and minute. */
if (strlen (p) == 8 && p [2] == '-' && p [5] == '-'){
p [2] = 0;
p [5] = 0;
tim.tm_mon = (int) atol (p);
if (!tim.tm_mon)
free_and_return (0)
else
tim.tm_mon--;
tim.tm_mday = (int) atol (p + 3);
tim.tm_year = (int) atol (p + 6);
if (tim.tm_year < 70)
tim.tm_year += 70;
extfs_format_date = 1;
} else
free_and_return (0);
}
if (!extfs_format_date){
if (!is_num (idx))
free_and_return (0);
tim.tm_mday = (int)atol (columns [idx++]);
}
/* Microsoft ftp server may send a non padded digit */
if (columns [idx][2] != ':' && columns [idx][1] != ':'){
/* There is a year */
l = atol (columns [idx++]);
if (l < 1900 || l > 3000)
free_and_return (0);
tim.tm_year = (int) (l - 1900);
tim.tm_hour = 0;
tim.tm_min = 0;
tim.tm_sec = 0;
year_supplied = 1;
}
if (columns [idx][2] == ':' || columns [idx][1] == ':'){
if (sscanf (columns [idx],
"%2d:%2d", &tim.tm_hour, &tim.tm_min) != 2){
if (!year_supplied)
free_and_return (0);
tim.tm_hour = 0;
tim.tm_min = 0;
tim.tm_sec = 0;
} else {
idx++;
tim.tm_sec = 0;
if (!extfs_format_date && !year_supplied){
tim.tm_year = current_year;
if (tim.tm_mon > current_mon)
tim.tm_year--;
}
}
} else if (!year_supplied)
free_and_return (0);
tim.tm_isdst = 0;
s->st_mtime = mktime (&tim);
if (s->st_mtime == -1)
s->st_mtime = 0;
s->st_atime = s->st_mtime;
s->st_ctime = s->st_mtime;
s->st_dev = 0;
s->st_ino = 0;
#ifdef HAVE_ST_BLKSIZE
s->st_blksize = 512;
#endif
#ifdef HAVE_ST_BLOCKS
s->st_blocks = (s->st_size + 511) / 512;
#endif
for (i = idx + 1, idx2 = 0; i < num_cols; i++ )
if (strcmp (columns [i], "->") == 0){
idx2 = i;
break;
}
if (((S_ISLNK (s->st_mode) ||
(num_cols == idx + 3 && s->st_nlink > 1))) /* Maybe a hardlink? (in extfs) */
&& idx2){
int p;
char *s;
if (filename){
p = column_ptr [idx2] - column_ptr [idx];
s = xmalloc (p, "filename");
strncpy (s, p_copy + column_ptr [idx], p - 1);
s[p - 1] = '\0';
*filename = s;
}
if (linkname){
s = strdup (p_copy + column_ptr [idx2+1]);
p = strlen (s);
if (s [p-1] == '\r' || s [p-1] == '\n')
s [p-1] = 0;
if (s [p-2] == '\r' || s [p-2] == '\n')
s [p-2] = 0;
*linkname = s;
}
} else {
/* Extract the filename from the string copy, not from the columns
* this way we have a chance of entering hidden directories like ". ."
*/
if (filename){
/*
*filename = strdup (columns [idx++]);
*/
int p;
char *s;
s = strdup (p_copy + column_ptr [idx++]);
p = strlen (s);
if (s [p-1] == '\r' || s [p-1] == '\n')
s [p-1] = 0;
if (s [p-2] == '\r' || s [p-2] == '\n')
s [p-2] = 0;
*filename = s;
}
if (linkname)
*linkname = NULL;
}
free_and_return (1);
}
void
vfs_force_expire (char *pathname)
{
vfs *vfs;
pathname = vfs_canon (pathname);
vfs = vfs_type (pathname);
if (vfs->forget_about)
(*vfs->forget_about) (pathname);
free (pathname);
}
void
vfs_die (char *m)
{
message_1s (1, "Internal error:", m);
exit (1);
}
#ifndef VFS_STANDALONE
char *
vfs_get_password (char *msg)
{
return (char *) input_dialog (msg, _("Password:"), "");
}
#endif
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