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Sweden-Number/dlls/shell32/trash.c

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/*
* The freedesktop.org Trash, implemented using the 0.7 spec version
* (see http://www.ramendik.ru/docs/trashspec.html)
*
* Copyright (C) 2006 Mikolaj Zalewski
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <unistd.h>
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "winreg.h"
#include "shlwapi.h"
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <time.h>
#include "wine/debug.h"
#include "shell32_main.h"
#include "xdg.h"
WINE_DEFAULT_DEBUG_CHANNEL(trash);
static CRITICAL_SECTION TRASH_Creating;
static CRITICAL_SECTION_DEBUG TRASH_Creating_Debug =
{
0, 0, &TRASH_Creating,
{ &TRASH_Creating_Debug.ProcessLocksList,
&TRASH_Creating_Debug.ProcessLocksList},
0, 0, { (DWORD_PTR)__FILE__ ": TRASH_Creating"}
};
static CRITICAL_SECTION TRASH_Creating = { &TRASH_Creating_Debug, -1, 0, 0, 0, 0 };
static const char trashinfo_suffix[] = ".trashinfo";
static const char trashinfo_header[] = "[Trash Info]\n";
typedef struct
{
char *info_dir;
char *files_dir;
dev_t device;
} TRASH_BUCKET;
static TRASH_BUCKET *home_trash=NULL;
static char *init_home_dir(const char *subpath)
{
char *path = XDG_BuildPath(XDG_DATA_HOME, subpath);
if (path == NULL) return NULL;
if (!XDG_MakeDirs(path))
{
ERR("Couldn't create directory %s (errno=%d). Trash won't be available\n", debugstr_a(path), errno);
SHFree(path);
path=NULL;
}
return path;
}
static TRASH_BUCKET *TRASH_CreateHomeBucket(void)
{
TRASH_BUCKET *bucket;
struct stat trash_stat;
char *trash_path = NULL;
bucket = SHAlloc(sizeof(TRASH_BUCKET));
if (bucket == NULL)
{
errno = ENOMEM;
goto error;
}
memset(bucket, 0, sizeof(*bucket));
bucket->info_dir = init_home_dir("Trash/info/");
if (bucket->info_dir == NULL) goto error;
bucket->files_dir = init_home_dir("Trash/files/");
if (bucket->files_dir == NULL) goto error;
trash_path = XDG_BuildPath(XDG_DATA_HOME, "Trash/");
if (stat(trash_path, &trash_stat) == -1)
goto error;
bucket->device = trash_stat.st_dev;
SHFree(trash_path);
return bucket;
error:
SHFree(trash_path);
if (bucket)
{
SHFree(bucket->info_dir);
SHFree(bucket->files_dir);
}
SHFree(bucket);
return NULL;
}
static BOOL TRASH_EnsureInitialized(void)
{
if (home_trash == NULL)
{
EnterCriticalSection(&TRASH_Creating);
if (home_trash == NULL)
home_trash = TRASH_CreateHomeBucket();
LeaveCriticalSection(&TRASH_Creating);
}
if (home_trash == NULL)
{
ERR("Couldn't initialize home trash (errno=%d)\n", errno);
return FALSE;
}
return TRUE;
}
static BOOL file_good_for_bucket(TRASH_BUCKET *pBucket, struct stat *file_stat)
{
if (pBucket->device != file_stat->st_dev)
return FALSE;
return TRUE;
}
BOOL TRASH_CanTrashFile(LPCWSTR wszPath)
{
struct stat file_stat;
char *unix_path;
TRACE("(%s)\n", debugstr_w(wszPath));
if (!TRASH_EnsureInitialized()) return FALSE;
if (!(unix_path = wine_get_unix_file_name(wszPath)))
return FALSE;
if (lstat(unix_path, &file_stat)==-1)
{
HeapFree(GetProcessHeap(), 0, unix_path);
return FALSE;
}
HeapFree(GetProcessHeap(), 0, unix_path);
return file_good_for_bucket(home_trash, &file_stat);
}
/*
* Try to create a single .trashinfo file. Return TRUE if successfull, else FALSE
*/
static BOOL try_create_trashinfo_file(const char *info_dir, const char *file_name,
const char *original_file_name)
{
struct tm curr_time;
time_t curr_time_secs;
char datebuf[200];
char *path = SHAlloc(strlen(info_dir)+strlen(file_name)+strlen(trashinfo_suffix)+1);
int writer = -1;
if (path==NULL) return FALSE;
wsprintfA(path, "%s%s%s", info_dir, file_name, trashinfo_suffix);
TRACE("Trying to create '%s'\n", path);
writer = open(path, O_CREAT|O_WRONLY|O_TRUNC|O_EXCL, 0600);
if (writer==-1) goto error;
write(writer, trashinfo_header, strlen(trashinfo_header));
if (!XDG_WriteDesktopStringEntry(writer, "Path", XDG_URLENCODE, original_file_name))
goto error;
time(&curr_time_secs);
localtime_r(&curr_time_secs, &curr_time);
wnsprintfA(datebuf, 200, "%04d-%02d-%02dT%02d:%02d:%02d",
curr_time.tm_year+1900,
curr_time.tm_mon+1,
curr_time.tm_mday,
curr_time.tm_hour,
curr_time.tm_min,
curr_time.tm_sec);
if (!XDG_WriteDesktopStringEntry(writer, "DeletionDate", 0, datebuf))
goto error;
close(writer);
SHFree(path);
return TRUE;
error:
if (writer != -1)
{
close(writer);
unlink(path);
}
SHFree(path);
return FALSE;
}
/*
* Try to create a .trashinfo file. This function will make several attempts with
* different filenames. It will return the filename that succeded or NULL if a file
* couldn't be created.
*/
static char *create_trashinfo(const char *info_dir, const char *file_path)
{
const char *base_name;
char *filename_buffer;
unsigned int seed = (unsigned int)time(NULL);
int i;
errno = ENOMEM; /* out-of-memory is the only case when errno isn't set */
base_name = strrchr(file_path, '/');
if (base_name == NULL)
base_name = file_path;
else
base_name++;
filename_buffer = SHAlloc(strlen(base_name)+9+1);
if (filename_buffer == NULL)
return NULL;
lstrcpyA(filename_buffer, base_name);
if (try_create_trashinfo_file(info_dir, filename_buffer, file_path))
return filename_buffer;
for (i=0; i<30; i++)
{
sprintf(filename_buffer, "%s-%d", base_name, i+1);
if (try_create_trashinfo_file(info_dir, filename_buffer, file_path))
return filename_buffer;
}
for (i=0; i<1000; i++)
{
sprintf(filename_buffer, "%s-%08x", base_name, rand_r(&seed));
if (try_create_trashinfo_file(info_dir, filename_buffer, file_path))
return filename_buffer;
}
WARN("Couldn't create trashinfo after 1031 tries (errno=%d)\n", errno);
SHFree(filename_buffer);
return NULL;
}
void remove_trashinfo_file(const char *info_dir, const char *base_name)
{
char *filename_buffer;
filename_buffer = SHAlloc(lstrlenA(info_dir)+lstrlenA(base_name)+lstrlenA(trashinfo_suffix)+1);
if (filename_buffer == NULL) return;
sprintf(filename_buffer, "%s%s%s", info_dir, base_name, trashinfo_suffix);
unlink(filename_buffer);
SHFree(filename_buffer);
}
static BOOL TRASH_MoveFileToBucket(TRASH_BUCKET *pBucket, const char *unix_path)
{
struct stat file_stat;
char *trash_file_name = NULL;
char *trash_path = NULL;
BOOL ret = TRUE;
if (lstat(unix_path, &file_stat)==-1)
return FALSE;
if (!file_good_for_bucket(pBucket, &file_stat))
return FALSE;
trash_file_name = create_trashinfo(pBucket->info_dir, unix_path);
if (trash_file_name == NULL)
return FALSE;
trash_path = SHAlloc(strlen(pBucket->files_dir)+strlen(trash_file_name)+1);
if (trash_path == NULL) goto error;
lstrcpyA(trash_path, pBucket->files_dir);
lstrcatA(trash_path, trash_file_name);
if (rename(unix_path, trash_path)==0)
{
TRACE("rename succeded\n");
goto cleanup;
}
/* TODO: try to manually move the file */
ERR("Couldn't move file\n");
error:
ret = FALSE;
remove_trashinfo_file(pBucket->info_dir, trash_file_name);
cleanup:
SHFree(trash_file_name);
SHFree(trash_path);
return ret;
}
BOOL TRASH_TrashFile(LPCWSTR wszPath)
{
char *unix_path;
BOOL result;
TRACE("(%s)\n", debugstr_w(wszPath));
if (!TRASH_EnsureInitialized()) return FALSE;
if (!(unix_path = wine_get_unix_file_name(wszPath)))
return FALSE;
result = TRASH_MoveFileToBucket(home_trash, unix_path);
HeapFree(GetProcessHeap(), 0, unix_path);
return result;
}
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