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125 lines
3.2 KiB
C
125 lines
3.2 KiB
C
/*
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* Copyright (C) Christian Amsüss <chrysn@fsfe.org>
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* Mount and unmount a few file systems, demonstrating that
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* vfs_iterate_mount_dirs performs as advertised.
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*
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* @author Christian Amsüss <chrysn@fsfe.org>
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*/
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#include <stdio.h>
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#include <assert.h>
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#include <string.h>
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#include <vfs.h>
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#include <fs/constfs.h>
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static constfs_file_t constfs_files[1] = {
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/* Not completely empty -- that'd be a hassle around empty arrays and
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* their size */
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{
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.path = "some-file",
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.size = 0,
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.data = (void*)"",
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},
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};
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static constfs_t constfs_desc = {
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.nfiles = ARRAY_SIZE(constfs_files),
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.files = constfs_files,
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};
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static vfs_mount_t mount1 = {
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.fs = &constfs_file_system,
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.mount_point = "/const1",
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.private_data = &constfs_desc,
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};
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static vfs_mount_t mount2 = {
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.fs = &constfs_file_system,
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.mount_point = "/const2",
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.private_data = &constfs_desc,
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};
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static vfs_mount_t mount3 = {
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.fs = &constfs_file_system,
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.mount_point = "/const3",
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.private_data = &constfs_desc,
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};
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static vfs_mount_t mount4 = {
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.fs = &constfs_file_system,
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.mount_point = "/const4",
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.private_data = &constfs_desc,
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};
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/* Crank the iterator, reporting "N%s" for the next entry, or "O\n" for the end
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* of the iterator (avoiding the letter "E" which may be misread for an error
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* in a casual look at the error output) */
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static void iter_and_report(vfs_DIR *iter) {
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bool result = vfs_iterate_mount_dirs(iter);
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if (result) {
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printf("N(%s)", iter->mp->mount_point);
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} else {
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printf("O\n");
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/* Zero out so we're ready for next round immediately */
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memset(iter, 0, sizeof(*iter));
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}
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}
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int main(void) {
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int res = 0;
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vfs_DIR iter;
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memset(&iter, 0, sizeof(iter));
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res |= vfs_mount(&mount1);
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res |= vfs_mount(&mount2);
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res |= vfs_mount(&mount3);
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res |= vfs_mount(&mount4);
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assert(res == 0);
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printf("Mounted 1234\n");
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/* N1N2N3N4E */
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iter_and_report(&iter);
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iter_and_report(&iter);
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iter_and_report(&iter);
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iter_and_report(&iter);
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iter_and_report(&iter);
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/* N1N2, unmount 3, N4E */
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iter_and_report(&iter);
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iter_and_report(&iter);
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res |= vfs_umount(&mount3, false);
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iter_and_report(&iter);
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iter_and_report(&iter);
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/* N1, unmount 2, (3 is already unmounted), N4, mount 3 N3, unmount 1 and remount it at the end N1, O */
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/* It is OK that 1 is reported twice, because its first occurrence is its
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* old mounting, and later it reappears */
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iter_and_report(&iter);
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res |= vfs_umount(&mount2, false);
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iter_and_report(&iter);
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res |= vfs_mount(&mount3);
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iter_and_report(&iter);
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res |= vfs_umount(&mount1, false);
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res |= vfs_mount(&mount1);
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iter_and_report(&iter);
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iter_and_report(&iter);
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/* This ensures we're not leaking locks */
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res |= vfs_umount(&mount1, false);
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res |= vfs_umount(&mount3, false);
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res |= vfs_umount(&mount4, false);
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printf("All unmounted\n");
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/* Only O */
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iter_and_report(&iter);
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}
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