Function sys_unlink

components/lwp/lwp_syscall.c:1099–1136

* @brief Removes a file or symbolic link from the filesystem. * * This system call deletes the file or symbolic link specified by `pathname`. * After the call, the file will be unlinked from the filesystem, meaning it will * no longer be accessible via its pathname. If the file is still open, it will * remain available to processes that have it open until all file descriptors are * closed. I

 * @see sys_open(), sys_remove(), unlink()
 */
sysret_t sys_unlink(const char *pathname)
{
#ifdef ARCH_MM_MMU
    int ret = -1;
    rt_size_t len = 0;
    char *kname = RT_NULL;

    len = lwp_user_strlen(pathname);
    if (!len)
    {
        return -EINVAL;
    }

    kname = (char *)kmem_get(len + 1);
    if (!kname)
    {
        return -ENOMEM;
    }

    if (lwp_get_from_user(kname, (void *)pathname, len + 1) != (len + 1))
    {
        kmem_put(kname);
        return -EINVAL;
    }
    ret = unlink(kname);
    if (ret < 0)
    {
        ret = GET_ERRNO();
    }

    kmem_put(kname);
    return ret;
#else
    int ret = 0;
    ret = unlink(pathname);
    return (ret < 0 ? GET_ERRNO() : ret);
#endif
}

/**
 * @brief Suspends execution for a specified amount of time.