/*
* mount a file system
*/
int mount(const char * dev, const char * dir, const char * fs, u32_t flags)
{
char dev_path[MAX_PATH];
char dir_path[MAX_PATH];
struct stat st;
int err;
if((err = vfs_path_conv(dir, dir_path)) != 0)
return err;
if(dev != NULL)
{
if((err = vfs_path_conv(dev, dev_path)) != 0)
return err;
if(stat(dev_path, &st) != 0)
return EEXIST;
if(! S_ISBLK(st.st_mode))
return EACCES;
return sys_mount(dev_path, dir_path, (char *)fs, flags);
}
else
return sys_mount(NULL, dir_path, (char *)fs, flags);
}
/*
* open a file with flags and mode and return file descriptor.
*/
int open(const char * path, u32_t flags, u32_t mode)
{
char buf[MAX_PATH];
struct file * fp;
int fd;
int err;
if((fd = fd_alloc(0)) < 0)
return -1;
if(vfs_path_conv(path, buf) !=0 )
{
fd_free(fd);
return -1;
}
if((err = sys_open(buf, flags, mode, &fp)) != 0)
{
fd_free(fd);
return err;
}
set_fp(fd, fp);
return fd;
}
/*
* unmount file systems
*/
int umount(const char * dir)
{
char buf[MAX_PATH];
int err;
if((err = vfs_path_conv(dir, buf)) != 0)
return err;
return sys_umount(buf);
}
/*
* get file's status
*/
int stat(const char * path, struct stat * st)
{
char buf[MAX_PATH];
int err;
if((err = vfs_path_conv(path, buf)) !=0 )
return err;
return sys_stat(buf, st);
}
/*
* remove a empty directories
*/
int rmdir(const char * path)
{
char buf[MAX_PATH];
int err;
if((err = vfs_path_conv(path, buf)) !=0 )
return err;
return sys_rmdir(buf);
}
/*
* create a directory with mode
*/
int mkdir(const char * path, u32_t mode)
{
char buf[MAX_PATH];
int err;
if((err = vfs_path_conv(path, buf)) !=0 )
return err;
return sys_mkdir(buf, mode);
}
/*
* mount a file system
*/
int mount(const char * dev, const char * dir, const char * fs, u32_t flags)
{
char dir_path[MAX_PATH];
int err;
if((err = vfs_path_conv(dir, dir_path)) != 0)
return err;
return sys_mount((char *)dev, dir_path, (char *)fs, flags);
}
/*
* change the current working directory to the specified path
*/
int chdir(const char * path)
{
char buf[MAX_PATH];
struct file * fp;
int err;
if((err = vfs_path_conv(path, buf)) !=0 )
return err;
/* check if directory exits */
if((err = sys_opendir(buf, &fp)) != 0)
return err;
/* new fp for current work directory */
if(vfs_getcwdfp())
sys_closedir(vfs_getcwdfp());
vfs_setcwdfp(fp);
/* set current work directory */
vfs_setcwd(buf);
return 0;
}
/*
* open a directory
*/
void * opendir(const char * name)
{
char buf[MAX_PATH];
struct dir * dir;
struct file * fp;
int fd;
int err;
if((dir = malloc(sizeof(struct dir))) == NULL)
return NULL;
/* find empty slot for file descriptor. */
if((fd = fd_alloc(0)) < 0)
{
free(dir);
return NULL;
}
if((err = vfs_path_conv(name, buf)) !=0 )
{
free(dir);
fd_free(fd);
return NULL;
}
if((err = sys_opendir(buf, &fp)) != 0)
{
free(dir);
fd_free(fd);
return NULL;
}
set_fp(fd, fp);
dir->fd = fd;
return (void *)dir;
}
