mc/vfs/local.c

342 lines
6.1 KiB
C

/**
* \file
* \brief Source: local FS
*/
#include <config.h>
#include <errno.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include "../src/global.h"
#include "../src/tty/tty.h" /* enable/disable interrupt key */
#include "../src/wtools.h" /* message() */
#include "../src/main.h" /* print_vfs_message */
#include "utilvfs.h"
#include "vfs.h"
#include "local.h"
/**
* Note: Some of this functions are not static. This has rather good
* reason: exactly same functions would have to appear in sfs.c. This
* saves both computer's memory and my work. <pavel@ucw.cz>
*/
static struct vfs_class vfs_local_ops;
static void *
local_open (struct vfs_class *me, const char *file, int flags, int mode)
{
int *local_info;
int fd;
(void) me;
fd = open (file, NO_LINEAR (flags), mode);
if (fd == -1)
return 0;
local_info = g_new (int, 1);
*local_info = fd;
return local_info;
}
ssize_t
local_read (void *data, char *buffer, int count)
{
int n;
if (!data)
return -1;
while ((n = read (*((int *) data), buffer, count)) == -1){
#ifdef EAGAIN
if (errno == EAGAIN) continue;
#endif
#ifdef EINTR
if (errno == EINTR) continue;
#endif
return -1;
}
return n;
}
int
local_close (void *data)
{
int fd;
if (!data)
return -1;
fd = *(int *) data;
g_free (data);
return close (fd);
}
int
local_errno (struct vfs_class *me)
{
(void) me;
return errno;
}
static void *
local_opendir (struct vfs_class *me, const char *dirname)
{
DIR **local_info;
DIR *dir;
(void) me;
dir = opendir (dirname);
if (!dir)
return 0;
local_info = (DIR **) g_new (DIR *, 1);
*local_info = dir;
return local_info;
}
static void *
local_readdir (void *data)
{
return readdir (*(DIR **) data);
}
static int
local_closedir (void *data)
{
int i;
i = closedir (* (DIR **) data);
g_free (data);
return i;
}
static int
local_stat (struct vfs_class *me, const char *path, struct stat *buf)
{
(void) me;
return stat (path, buf);
}
static int
local_lstat (struct vfs_class *me, const char *path, struct stat *buf)
{
(void) me;
#ifndef HAVE_STATLSTAT
return lstat (path,buf);
#else
return statlstat (path, buf);
#endif
}
int
local_fstat (void *data, struct stat *buf)
{
/* FIXME: avoid type cast */
return fstat (*((int *) data), buf);
}
static int
local_chmod (struct vfs_class *me, const char *path, int mode)
{
(void) me;
return chmod (path, mode);
}
static int
local_chown (struct vfs_class *me, const char *path, int owner, int group)
{
(void) me;
return chown (path, owner, group);
}
static int
local_utime (struct vfs_class *me, const char *path, struct utimbuf *times)
{
(void) me;
return utime (path, times);
}
static int
local_readlink (struct vfs_class *me, const char *path, char *buf, size_t size)
{
(void) me;
return readlink (path, buf, size);
}
static int
local_unlink (struct vfs_class *me, const char *path)
{
(void) me;
return unlink (path);
}
static int
local_symlink (struct vfs_class *me, const char *n1, const char *n2)
{
(void) me;
return symlink (n1, n2);
}
static ssize_t
local_write (void *data, const char *buf, int nbyte)
{
int fd;
int n;
if (!data)
return -1;
fd = * (int *) data;
while ((n = write (fd, buf, nbyte)) == -1){
#ifdef EAGAIN
if (errno == EAGAIN) continue;
#endif
#ifdef EINTR
if (errno == EINTR) continue;
#endif
break;
}
return n;
}
static int
local_rename (struct vfs_class *me, const char *a, const char *b)
{
(void) me;
return rename (a, b);
}
static int
local_chdir (struct vfs_class *me, const char *path)
{
(void) me;
return chdir (path);
}
off_t
local_lseek (void *data, off_t offset, int whence)
{
int fd = * (int *) data;
return lseek (fd, offset, whence);
}
static int
local_mknod (struct vfs_class *me, const char *path, int mode, int dev)
{
(void) me;
return mknod (path, mode, dev);
}
static int
local_link (struct vfs_class *me, const char *p1, const char *p2)
{
(void) me;
return link (p1, p2);
}
static int
local_mkdir (struct vfs_class *me, const char *path, mode_t mode)
{
(void) me;
return mkdir (path, mode);
}
static int
local_rmdir (struct vfs_class *me, const char *path)
{
(void) me;
return rmdir (path);
}
static char *
local_getlocalcopy (struct vfs_class *me, const char *path)
{
(void) me;
return g_strdup (path);
}
static int
local_ungetlocalcopy (struct vfs_class *me, const char *path,
const char *local, int has_changed)
{
(void) me;
(void) path;
(void) local;
(void) has_changed;
return 0;
}
static int
local_which (struct vfs_class *me, const char *path)
{
(void) me;
(void) path;
return 0; /* Every path which other systems do not like is expected to be ours */
}
void
init_localfs (void)
{
vfs_local_ops.name = "localfs";
vfs_local_ops.flags = VFSF_LOCAL;
vfs_local_ops.which = local_which;
vfs_local_ops.open = local_open;
vfs_local_ops.close = local_close;
vfs_local_ops.read = local_read;
vfs_local_ops.write = local_write;
vfs_local_ops.opendir = local_opendir;
vfs_local_ops.readdir = local_readdir;
vfs_local_ops.closedir = local_closedir;
vfs_local_ops.stat = local_stat;
vfs_local_ops.lstat = local_lstat;
vfs_local_ops.fstat = local_fstat;
vfs_local_ops.chmod = local_chmod;
vfs_local_ops.chown = local_chown;
vfs_local_ops.utime = local_utime;
vfs_local_ops.readlink = local_readlink;
vfs_local_ops.symlink = local_symlink;
vfs_local_ops.link = local_link;
vfs_local_ops.unlink = local_unlink;
vfs_local_ops.rename = local_rename;
vfs_local_ops.chdir = local_chdir;
vfs_local_ops.ferrno = local_errno;
vfs_local_ops.lseek = local_lseek;
vfs_local_ops.mknod = local_mknod;
vfs_local_ops.getlocalcopy = local_getlocalcopy;
vfs_local_ops.ungetlocalcopy = local_ungetlocalcopy;
vfs_local_ops.mkdir = local_mkdir;
vfs_local_ops.rmdir = local_rmdir;
vfs_register_class (&vfs_local_ops);
}