0,0 → 1,595 |
/* |
* Copyright (c) 2008 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
|
/** @addtogroup libc |
* @{ |
*/ |
/** @file |
*/ |
|
#include <vfs/vfs.h> |
#include <vfs/canonify.h> |
#include <stdlib.h> |
#include <unistd.h> |
#include <dirent.h> |
#include <fcntl.h> |
#include <sys/stat.h> |
#include <stdio.h> |
#include <sys/types.h> |
#include <ipc/ipc.h> |
#include <ipc/services.h> |
#include <async.h> |
#include <atomic.h> |
#include <futex.h> |
#include <errno.h> |
#include <string.h> |
#include <ipc/devmap.h> |
#include "../../srv/vfs/vfs.h" |
|
int vfs_phone = -1; |
futex_t vfs_phone_futex = FUTEX_INITIALIZER; |
|
futex_t cwd_futex = FUTEX_INITIALIZER; |
DIR *cwd_dir = NULL; |
char *cwd_path = NULL; |
size_t cwd_len = 0; |
|
static char *absolutize(const char *path, size_t *retlen) |
{ |
char *ncwd_path; |
|
futex_down(&cwd_futex); |
size_t len = strlen(path); |
if (*path != '/') { |
if (!cwd_path) { |
futex_up(&cwd_futex); |
return NULL; |
} |
ncwd_path = malloc(len + cwd_len + 1); |
if (!ncwd_path) { |
futex_up(&cwd_futex); |
return NULL; |
} |
strcpy(ncwd_path, cwd_path); |
ncwd_path[cwd_len] = '/'; |
ncwd_path[cwd_len + 1] = '\0'; |
} else { |
ncwd_path = malloc(len + 1); |
if (!ncwd_path) { |
futex_up(&cwd_futex); |
return NULL; |
} |
ncwd_path[0] = '\0'; |
} |
strcat(ncwd_path, path); |
if (!canonify(ncwd_path, retlen)) { |
futex_up(&cwd_futex); |
free(ncwd_path); |
return NULL; |
} |
futex_up(&cwd_futex); |
return ncwd_path; |
} |
|
static int vfs_connect(void) |
{ |
if (vfs_phone < 0) |
vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0); |
return vfs_phone; |
} |
|
static int device_get_handle(char *name, dev_handle_t *handle) |
{ |
int phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0); |
if (phone < 0) |
return phone; |
|
ipc_call_t answer; |
aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, 0, 0, |
&answer); |
|
ipcarg_t retval = ipc_data_write_start(phone, name, strlen(name) + 1); |
|
if (retval != EOK) { |
async_wait_for(req, NULL); |
ipc_hangup(phone); |
return retval; |
} |
|
async_wait_for(req, &retval); |
|
if (handle != NULL) |
*handle = -1; |
|
if (retval == EOK) { |
if (handle != NULL) |
*handle = (dev_handle_t) IPC_GET_ARG1(answer); |
} |
|
ipc_hangup(phone); |
return retval; |
} |
|
int mount(const char *fs_name, const char *mp, const char *dev) |
{ |
int res; |
ipcarg_t rc; |
aid_t req; |
dev_handle_t dev_handle; |
|
res = device_get_handle(dev, &dev_handle); |
if (res != EOK) |
return res; |
|
size_t mpa_len; |
char *mpa = absolutize(mp, &mpa_len); |
if (!mpa) |
return ENOMEM; |
|
futex_down(&vfs_phone_futex); |
async_serialize_start(); |
if (vfs_phone < 0) { |
res = vfs_connect(); |
if (res < 0) { |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(mpa); |
return res; |
} |
} |
req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL); |
rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name)); |
if (rc != EOK) { |
async_wait_for(req, NULL); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(mpa); |
return (int) rc; |
} |
rc = ipc_data_write_start(vfs_phone, (void *)mpa, mpa_len); |
if (rc != EOK) { |
async_wait_for(req, NULL); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(mpa); |
return (int) rc; |
} |
async_wait_for(req, &rc); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(mpa); |
return (int) rc; |
} |
|
static int _open(const char *path, int lflag, int oflag, ...) |
{ |
int res; |
ipcarg_t rc; |
ipc_call_t answer; |
aid_t req; |
|
size_t pa_len; |
char *pa = absolutize(path, &pa_len); |
if (!pa) |
return ENOMEM; |
|
futex_down(&vfs_phone_futex); |
async_serialize_start(); |
if (vfs_phone < 0) { |
res = vfs_connect(); |
if (res < 0) { |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(pa); |
return res; |
} |
} |
req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer); |
rc = ipc_data_write_start(vfs_phone, pa, pa_len); |
if (rc != EOK) { |
async_wait_for(req, NULL); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(pa); |
return (int) rc; |
} |
async_wait_for(req, &rc); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(pa); |
|
if (rc != EOK) return (int) rc; |
return (int) IPC_GET_ARG1(answer); |
} |
|
int open(const char *path, int oflag, ...) |
{ |
return _open(path, L_FILE, oflag); |
} |
|
int close(int fildes) |
{ |
int res; |
ipcarg_t rc; |
|
futex_down(&vfs_phone_futex); |
async_serialize_start(); |
if (vfs_phone < 0) { |
res = vfs_connect(); |
if (res < 0) { |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
return res; |
} |
} |
|
rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes); |
|
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
|
return (int)rc; |
} |
|
ssize_t read(int fildes, void *buf, size_t nbyte) |
{ |
int res; |
ipcarg_t rc; |
ipc_call_t answer; |
aid_t req; |
|
futex_down(&vfs_phone_futex); |
async_serialize_start(); |
if (vfs_phone < 0) { |
res = vfs_connect(); |
if (res < 0) { |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
return res; |
} |
} |
req = async_send_1(vfs_phone, VFS_READ, fildes, &answer); |
rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte); |
if (rc != EOK) { |
async_wait_for(req, NULL); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
return (ssize_t) rc; |
} |
async_wait_for(req, &rc); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
if (rc == EOK) |
return (ssize_t) IPC_GET_ARG1(answer); |
else |
return -1; |
} |
|
ssize_t write(int fildes, const void *buf, size_t nbyte) |
{ |
int res; |
ipcarg_t rc; |
ipc_call_t answer; |
aid_t req; |
|
futex_down(&vfs_phone_futex); |
async_serialize_start(); |
if (vfs_phone < 0) { |
res = vfs_connect(); |
if (res < 0) { |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
return res; |
} |
} |
req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer); |
rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte); |
if (rc != EOK) { |
async_wait_for(req, NULL); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
return (ssize_t) rc; |
} |
async_wait_for(req, &rc); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
if (rc == EOK) |
return (ssize_t) IPC_GET_ARG1(answer); |
else |
return -1; |
} |
|
off_t lseek(int fildes, off_t offset, int whence) |
{ |
int res; |
ipcarg_t rc; |
|
futex_down(&vfs_phone_futex); |
async_serialize_start(); |
if (vfs_phone < 0) { |
res = vfs_connect(); |
if (res < 0) { |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
return res; |
} |
} |
|
off_t newoffs; |
rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence, |
(ipcarg_t)&newoffs); |
|
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
|
if (rc != EOK) |
return (off_t) -1; |
|
return newoffs; |
} |
|
int ftruncate(int fildes, off_t length) |
{ |
int res; |
ipcarg_t rc; |
|
futex_down(&vfs_phone_futex); |
async_serialize_start(); |
if (vfs_phone < 0) { |
res = vfs_connect(); |
if (res < 0) { |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
return res; |
} |
} |
rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
return (int) rc; |
} |
|
DIR *opendir(const char *dirname) |
{ |
DIR *dirp = malloc(sizeof(DIR)); |
if (!dirp) |
return NULL; |
dirp->fd = _open(dirname, L_DIRECTORY, 0); |
if (dirp->fd < 0) { |
free(dirp); |
return NULL; |
} |
return dirp; |
} |
|
struct dirent *readdir(DIR *dirp) |
{ |
ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1); |
if (len <= 0) |
return NULL; |
return &dirp->res; |
} |
|
void rewinddir(DIR *dirp) |
{ |
(void) lseek(dirp->fd, 0, SEEK_SET); |
} |
|
int closedir(DIR *dirp) |
{ |
(void) close(dirp->fd); |
free(dirp); |
return 0; |
} |
|
int mkdir(const char *path, mode_t mode) |
{ |
int res; |
ipcarg_t rc; |
aid_t req; |
|
size_t pa_len; |
char *pa = absolutize(path, &pa_len); |
if (!pa) |
return ENOMEM; |
|
futex_down(&vfs_phone_futex); |
async_serialize_start(); |
if (vfs_phone < 0) { |
res = vfs_connect(); |
if (res < 0) { |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(pa); |
return res; |
} |
} |
req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL); |
rc = ipc_data_write_start(vfs_phone, pa, pa_len); |
if (rc != EOK) { |
async_wait_for(req, NULL); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(pa); |
return (int) rc; |
} |
async_wait_for(req, &rc); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(pa); |
return rc; |
} |
|
static int _unlink(const char *path, int lflag) |
{ |
int res; |
ipcarg_t rc; |
aid_t req; |
|
size_t pa_len; |
char *pa = absolutize(path, &pa_len); |
if (!pa) |
return ENOMEM; |
|
futex_down(&vfs_phone_futex); |
async_serialize_start(); |
if (vfs_phone < 0) { |
res = vfs_connect(); |
if (res < 0) { |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(pa); |
return res; |
} |
} |
req = async_send_0(vfs_phone, VFS_UNLINK, NULL); |
rc = ipc_data_write_start(vfs_phone, pa, pa_len); |
if (rc != EOK) { |
async_wait_for(req, NULL); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(pa); |
return (int) rc; |
} |
async_wait_for(req, &rc); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(pa); |
return rc; |
} |
|
int unlink(const char *path) |
{ |
return _unlink(path, L_NONE); |
} |
|
int rmdir(const char *path) |
{ |
return _unlink(path, L_DIRECTORY); |
} |
|
int rename(const char *old, const char *new) |
{ |
int res; |
ipcarg_t rc; |
aid_t req; |
|
size_t olda_len; |
char *olda = absolutize(old, &olda_len); |
if (!olda) |
return ENOMEM; |
|
size_t newa_len; |
char *newa = absolutize(new, &newa_len); |
if (!newa) { |
free(olda); |
return ENOMEM; |
} |
|
futex_down(&vfs_phone_futex); |
async_serialize_start(); |
if (vfs_phone < 0) { |
res = vfs_connect(); |
if (res < 0) { |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(olda); |
free(newa); |
return res; |
} |
} |
req = async_send_0(vfs_phone, VFS_RENAME, NULL); |
rc = ipc_data_write_start(vfs_phone, olda, olda_len); |
if (rc != EOK) { |
async_wait_for(req, NULL); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(olda); |
free(newa); |
return (int) rc; |
} |
rc = ipc_data_write_start(vfs_phone, newa, newa_len); |
if (rc != EOK) { |
async_wait_for(req, NULL); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(olda); |
free(newa); |
return (int) rc; |
} |
async_wait_for(req, &rc); |
async_serialize_end(); |
futex_up(&vfs_phone_futex); |
free(olda); |
free(newa); |
return rc; |
} |
|
int chdir(const char *path) |
{ |
size_t pa_len; |
char *pa = absolutize(path, &pa_len); |
if (!pa) |
return ENOMEM; |
|
DIR *d = opendir(pa); |
if (!d) { |
free(pa); |
return ENOENT; |
} |
|
futex_down(&cwd_futex); |
if (cwd_dir) { |
closedir(cwd_dir); |
cwd_dir = NULL; |
free(cwd_path); |
cwd_path = NULL; |
cwd_len = 0; |
} |
cwd_dir = d; |
cwd_path = pa; |
cwd_len = pa_len; |
futex_up(&cwd_futex); |
} |
|
char *getcwd(char *buf, size_t size) |
{ |
if (!size) |
return NULL; |
futex_down(&cwd_futex); |
if (size < cwd_len + 1) { |
futex_up(&cwd_futex); |
return NULL; |
} |
strcpy(buf, cwd_path); |
futex_up(&cwd_futex); |
return buf; |
} |
|
/** @} |
*/ |