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rockbox/uisimulator/common/io.c
Linus Nielsen Feltzing 37b15d3833 Protect against text-mode files in Windows by using open() instead of creat() 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8781 a1c6a512-1295-4272-9138-f99709370657
2006-02-22 14:41:45 +00:00

455 lines
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 Daniel Stenberg
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <sys/stat.h>
#ifdef __FreeBSD__
#include <sys/param.h>
#include <sys/mount.h>
#elif !defined(WIN32)
#include <sys/vfs.h>
#endif
#ifdef WIN32
#include <windows.h>
#endif
#ifndef _MSC_VER
#include <dirent.h>
#include <unistd.h>
#else
#include "dir-win32.h"
#endif
#define MAX_PATH 260
#include <fcntl.h>
#include "debug.h"
#define SIMULATOR_ARCHOS_ROOT "archos"
struct sim_dirent {
unsigned char d_name[MAX_PATH];
int attribute;
int size;
int startcluster;
unsigned short wrtdate; /* Last write date */
unsigned short wrttime; /* Last write time */
};
struct dirstruct {
void *dir; /* actually a DIR* dir */
char *name;
} SIM_DIR;
struct mydir {
DIR *dir;
char *name;
};
typedef struct mydir MYDIR;
#if 1 /* maybe this needs disabling for MSVC... */
static unsigned int rockbox2sim(int opt)
{
#ifdef WIN32
int newopt = O_BINARY;
#else
int newopt = 0;
#endif
if(opt & 1)
newopt |= O_WRONLY;
if(opt & 2)
newopt |= O_RDWR;
if(opt & 4)
newopt |= O_CREAT;
if(opt & 8)
newopt |= O_APPEND;
if(opt & 0x10)
newopt |= O_TRUNC;
return newopt;
}
#endif
MYDIR *sim_opendir(const char *name)
{
char buffer[256]; /* sufficiently big */
DIR *dir;
if(name[0] == '/') {
sprintf(buffer, "%s%s", SIMULATOR_ARCHOS_ROOT, name);
dir=(DIR *)opendir(buffer);
}
else
dir=(DIR *)opendir(name);
if(dir) {
MYDIR *my = (MYDIR *)malloc(sizeof(MYDIR));
my->dir = dir;
my->name = (char *)strdup(name);
return my;
}
/* failed open, return NULL */
return (MYDIR *)0;
}
struct sim_dirent *sim_readdir(MYDIR *dir)
{
char buffer[512]; /* sufficiently big */
static struct sim_dirent secret;
struct stat s;
struct dirent *x11 = (readdir)(dir->dir);
if(!x11)
return (struct sim_dirent *)0;
strcpy((char *)secret.d_name, x11->d_name);
/* build file name */
sprintf(buffer, SIMULATOR_ARCHOS_ROOT "%s/%s",
dir->name, x11->d_name);
stat(buffer, &s); /* get info */
#define ATTR_DIRECTORY 0x10
secret.attribute = S_ISDIR(s.st_mode)?ATTR_DIRECTORY:0;
secret.size = s.st_size;
secret.wrtdate = (unsigned short)(s.st_mtime >> 16);
secret.wrttime = (unsigned short)(s.st_mtime & 0xFFFF);
return &secret;
}
void sim_closedir(MYDIR *dir)
{
free(dir->name);
closedir(dir->dir);
free(dir);
}
int sim_open(const char *name, int o)
{
char buffer[256]; /* sufficiently big */
int opts = rockbox2sim(o);
if(name[0] == '/') {
sprintf(buffer, "%s%s", SIMULATOR_ARCHOS_ROOT, name);
debugf("We open the real file '%s'\n", buffer);
return open(buffer, opts, 0666);
}
fprintf(stderr, "WARNING, bad file name lacks slash: %s\n",
name);
return -1;
}
int sim_creat(const char *name, mode_t mode)
{
char buffer[256]; /* sufficiently big */
int opts = rockbox2sim(mode);
if(name[0] == '/') {
sprintf(buffer, "%s%s", SIMULATOR_ARCHOS_ROOT, name);
debugf("We create the real file '%s'\n", buffer);
return open(buffer, opts | O_CREAT | O_TRUNC, 0666);
}
fprintf(stderr, "WARNING, bad file name lacks slash: %s\n",
name);
return -1;
}
int sim_mkdir(const char *name, mode_t mode)
{
char buffer[256]; /* sufficiently big */
(void)mode;
sprintf(buffer, "%s%s", SIMULATOR_ARCHOS_ROOT, name);
debugf("We create the real directory '%s'\n", buffer);
#ifdef WIN32
/* since we build with -DNOCYGWIN we have the plain win32 version */
return mkdir(buffer);
#else
return mkdir(buffer, 0777);
#endif
}
int sim_rmdir(const char *name)
{
char buffer[256]; /* sufficiently big */
if(name[0] == '/') {
sprintf(buffer, "%s%s", SIMULATOR_ARCHOS_ROOT, name);
debugf("We remove the real directory '%s'\n", buffer);
return rmdir(buffer);
}
return rmdir(name);
}
int sim_remove(const char *name)
{
char buffer[256]; /* sufficiently big */
if(name[0] == '/') {
sprintf(buffer, "%s%s", SIMULATOR_ARCHOS_ROOT, name);
debugf("We remove the real file '%s'\n", buffer);
return remove(buffer);
}
return remove(name);
}
int sim_rename(const char *oldpath, const char* newpath)
{
char buffer1[256];
char buffer2[256];
if(oldpath[0] == '/') {
sprintf(buffer1, "%s%s", SIMULATOR_ARCHOS_ROOT, oldpath);
sprintf(buffer2, "%s%s", SIMULATOR_ARCHOS_ROOT, newpath);
debugf("We rename the real file '%s' to '%s'\n", buffer1, buffer2);
return rename(buffer1, buffer2);
}
return -1;
}
/* rockbox off_t may be different from system off_t */
long sim_lseek(int fildes, long offset, int whence)
{
return lseek(fildes, offset, whence);
}
long sim_filesize(int fd)
{
#ifdef WIN32
return _filelength(fd);
#else
struct stat buf;
if (!fstat(fd, &buf))
return buf.st_size;
else
return -1;
#endif
}
void fat_size(unsigned int* size, unsigned int* free)
{
#ifdef WIN32
long secperclus, bytespersec, free_clusters, num_clusters;
if (GetDiskFreeSpace(NULL, &secperclus, &bytespersec, &free_clusters,
&num_clusters)) {
if (size)
*size = num_clusters * secperclus / 2 * (bytespersec / 512);
if (free)
*free = free_clusters * secperclus / 2 * (bytespersec / 512);
}
#else
struct statfs fs;
if (!statfs(".", &fs)) {
DEBUGF("statfs: bsize=%d blocks=%d free=%d\n",
fs.f_bsize, fs.f_blocks, fs.f_bfree);
if (size)
*size = fs.f_blocks * (fs.f_bsize / 1024);
if (free)
*free = fs.f_bfree * (fs.f_bsize / 1024);
}
#endif
else {
if (size)
*size = 0;
if (free)
*free = 0;
}
}
int sim_fsync(int fd)
{
#ifdef WIN32
return _commit(fd);
#else
return fsync(fd);
#endif
}
#ifdef WIN32
/* sim-win32 */
#define dlopen(_x_, _y_) LoadLibrary(_x_)
#define dlsym(_x_, _y_) (void *)GetProcAddress(_x_, _y_)
#define dlclose(_x_) FreeLibrary(_x_)
#else
/* sim-x11 */
#include <dlfcn.h>
#endif
void *sim_codec_load_ram(char* codecptr, int size,
void* ptr2, int bufwrap, int *pd_fd)
{
void *pd, *hdr;
const char *path = "archos/_temp_codec.dll";
int fd;
int copy_n;
#ifdef WIN32
char buf[256];
#endif
*pd_fd = 0;
/* We have to create the dynamic link library file from ram
so we could simulate the codec loading. */
#ifdef WIN32
fd = open(path, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRWXU);
#else
fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU);
#endif
if (fd < 0) {
DEBUGF("failed to open for write: %s\n", path);
return NULL;
}
if (bufwrap == 0)
bufwrap = size;
copy_n = bufwrap < size ? bufwrap : size;
if (write(fd, codecptr, copy_n) != copy_n) {
DEBUGF("write failed");
return NULL;
}
size -= copy_n;
if (size > 0) {
if (write(fd, ptr2, size) != size) {
DEBUGF("write failed [2]");
return NULL;
}
}
close(fd);
/* Now load the library. */
pd = dlopen(path, RTLD_NOW);
if (!pd) {
DEBUGF("failed to load %s\n", path);
#ifdef WIN32
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(), 0,
buf, sizeof buf, NULL);
DEBUGF("dlopen(%s): %s\n", path, buf);
#else
DEBUGF("dlopen(%s): %s\n", path, dlerror());
#endif
dlclose(pd);
return NULL;
}
hdr = dlsym(pd, "__header");
if (!hdr)
hdr = dlsym(pd, "___header");
*pd_fd = (int)pd;
return hdr; /* maybe NULL if symbol not present */
}
void sim_codec_close(int pd)
{
dlclose((void *)pd);
}
void *sim_plugin_load(char *plugin, int *fd)
{
void *pd, *hdr;
char path[256];
#ifdef WIN32
char buf[256];
#endif
snprintf(path, sizeof path, "archos%s", plugin);
*fd = 0;
pd = dlopen(path, RTLD_NOW);
if (!pd) {
DEBUGF("failed to load %s\n", plugin);
#ifdef WIN32
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(), 0,
buf, sizeof buf, NULL);
DEBUGF("dlopen(%s): %s\n", path, buf);
#else
DEBUGF("dlopen(%s): %s\n", path, dlerror());
#endif
dlclose(pd);
return NULL;
}
hdr = dlsym(pd, "__header");
if (!hdr)
hdr = dlsym(pd, "___header");
*fd = (int)pd; /* success */
return hdr; /* maybe NULL if symbol not present */
}
void sim_plugin_close(int pd)
{
dlclose((void *)pd);
}
#if !defined(WIN32) || defined(SDL)
/* the win32 version is in debug-win32.c */
void debug_init(void)
{
/* nothing to be done */
}
void debugf(const char *fmt, ...)
{
va_list ap;
va_start( ap, fmt );
vfprintf( stderr, fmt, ap );
va_end( ap );
}
void ldebugf(const char* file, int line, const char *fmt, ...)
{
va_list ap;
va_start( ap, fmt );
fprintf( stderr, "%s:%d ", file, line );
vfprintf( stderr, fmt, ap );
va_end( ap );
}
#endif
/* rockbox off_t may be different from system off_t */
int sim_ftruncate(int fd, long length)
{
#ifdef WIN32
return _chsize(fd, length);
#else
return ftruncate(fd, length);
#endif
}
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