Function sys_fchdir

components/lwp/lwp_syscall.c:7541–7568

* @brief Changes the current working directory to the one associated with the specified file descriptor. * * This function changes the current working directory of the calling process * to the directory associated with the file descriptor `fd`. The file descriptor * should refer to an open directory. If the file descriptor does not refer to a * directory, or if the process lacks the necessary

 * @see sys_chdir(), sys_getcwd(), sys_opendir(), sys_open()
 */
sysret_t sys_fchdir(int fd)
{
    int errcode = -ENOSYS;
#ifdef ARCH_MM_MMU
#ifdef RT_USING_DFS_V2
    int err = -1;
    struct dfs_file *d;
    char *kpath;

    d = fd_get(fd);
    if (!d || !d->vnode)
    {
        return -EBADF;
    }
    kpath = dfs_dentry_full_path(d->dentry);
    if (!kpath)
    {
        return -EACCES;
    }

    err = chdir(kpath);
    errcode = err != 0 ? GET_ERRNO() : 0;

    kmem_put(kpath);
#endif
#endif
    return errcode;
}

/**
 * @brief Creates a new directory with the specified path and mode.