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px4_autopilot/apps/examples/mount/mount_main.c

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/****************************************************************************
* examples/mount/mount_main.c
*
* Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT OWNER OR CONTRIBUTORS 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/statfs.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <dirent.h>
#include <errno.h>
#include "mount.h"
/****************************************************************************
* Definitions
****************************************************************************/
#define TEST_USE_STAT 1
#define TEST_SHOW_DIRECTORIES 1
#define TEST_USE_STATFS 1
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
static const char g_mntdir[] = "/mnt";
static const char g_target[] = "/mnt/fs";
static const char g_filesystemtype[] = "vfat";
static const char g_testdir1[] = "/mnt/fs/TestDir";
static const char g_testdir2[] = "/mnt/fs/NewDir1";
static const char g_testdir3[] = "/mnt/fs/NewDir2";
static const char g_testdir4[] = "/mnt/fs/NewDir3";
#ifdef CONFIG_EXAMPLES_MOUNT_DEVNAME
static const char g_testfile1[] = "/mnt/fs/TestDir/TestFile.txt";
#endif
static const char g_testfile2[] = "/mnt/fs/TestDir/WrTest1.txt";
static const char g_testfile3[] = "/mnt/fs/NewDir1/WrTest2.txt";
static const char g_testfile4[] = "/mnt/fs/NewDir3/Renamed.txt";
static const char g_testmsg[] = "This is a write test";
static int g_nerrors = 0;
static char g_namebuffer[256];
/****************************************************************************
* Public Data
****************************************************************************/
const char g_source[] = MOUNT_DEVNAME;
/****************************************************************************
* Private Functions
****************************************************************************/
#ifdef TEST_USE_STAT
static void show_stat(const char *path, struct stat *ps)
{
printf("%s stat:\n", path);
printf("\tmode : %08x\n", ps->st_mode);
if (S_ISREG(ps->st_mode))
{
printf("\ttype : File\n");
}
else if (S_ISDIR(ps->st_mode))
{
printf("\ttype : Directory\n");
}
else if (S_ISCHR(ps->st_mode))
{
printf("\ttype : Character driver\n");
}
else if (S_ISBLK(ps->st_mode))
{
printf("\ttype : Block driver\n");
}
else
{
printf("\ttype : Unknown\n");
}
printf("\tsize : %d (bytes)\n", ps->st_size);
printf("\tblock size : %d (bytes)\n", ps->st_blksize);
printf("\tsize : %d (blocks)\n", ps->st_blocks);
printf("\taccess time : %d\n", ps->st_atime);
printf("\tmodify time : %d\n", ps->st_mtime);
printf("\tchange time : %d\n", ps->st_ctime);
}
#endif
/****************************************************************************
* Name: show_statfs
****************************************************************************/
#ifdef TEST_USE_STATFS
static void show_statfs(const char *path)
{
struct statfs buf;
int ret;
/* Try stat() against a file or directory. It should fail with expectederror */
printf("show_statfs: Try statfs(%s)\n", path);
ret = statfs(path, &buf);
if (ret == 0)
{
printf("show_statfs: statfs(%s) succeeded\n", path);
printf("\tFS Type : %0x\n", buf.f_type);
printf("\tBlock size : %d\n", buf.f_bsize);
printf("\tNumber of blocks : %d\n", buf.f_blocks);
printf("\tFree blocks : %d\n", buf.f_bfree);
printf("\tFree user blocks : %d\n", buf.f_bavail);
printf("\tNumber file nodes : %d\n", buf.f_files);
printf("\tFree file nodes : %d\n", buf.f_ffree);
printf("\tFile name length : %d\n", buf.f_namelen);
}
else
{
printf("show_statfs: ERROR statfs(%s) failed with errno=%d\n",
path, errno);
g_nerrors++;
}
}
#else
# define show_statfs(p)
#endif
/****************************************************************************
* Name: show_directories
****************************************************************************/
#ifdef TEST_SHOW_DIRECTORIES
static void show_directories(const char *path, int indent)
{
DIR *dirp;
struct dirent *direntry;
int i;
dirp = opendir(path);
if ( !dirp )
{
printf("show_directories: ERROR opendir(\"%s\") failed with errno=%d\n",
path, errno);
g_nerrors++;
return;
}
for (direntry = readdir(dirp); direntry; direntry = readdir(dirp))
{
for (i = 0; i < 2*indent; i++)
{
putchar(' ');
}
if (DIRENT_ISDIRECTORY(direntry->d_type))
{
char *subdir;
printf("%s/\n", direntry->d_name);
sprintf(g_namebuffer, "%s/%s", path, direntry->d_name);
subdir = strdup(g_namebuffer);
show_directories( subdir, indent + 1);
free(subdir);
}
else
{
printf("%s\n", direntry->d_name);
}
}
closedir(dirp);
}
#else
# define show_directories(p,i)
#endif
/****************************************************************************
* Name: fail_read_open
****************************************************************************/
#ifdef CONFIG_EXAMPLES_MOUNT_DEVNAME
static void fail_read_open(const char *path, int expectederror)
{
int fd;
printf("fail_read_open: Try open(%s) for reading\n", path);
fd = open(path, O_RDONLY);
if (fd >= 0)
{
printf("fail_read_open: ERROR open(%s) succeeded\n", path);
g_nerrors++;
close(fd);
}
else if (errno != expectederror)
{
printf("fail_read_open: ERROR open(%s) failed with errno=%d (expected %d)\n",
path, errno, expectederror);
g_nerrors++;
}
}
#endif
/****************************************************************************
* Name: read_test_file
****************************************************************************/
static void read_test_file(const char *path)
{
char buffer[128];
int nbytes;
int fd;
/* Read a test file that is already on the test file system image */
printf("read_test_file: opening %s for reading\n", path);
fd = open(path, O_RDONLY);
if (fd < 0)
{
printf("read_test_file: ERROR failed to open %s, errno=%d\n",
path, errno);
g_nerrors++;
}
else
{
memset(buffer, 0, 128);
nbytes = read(fd, buffer, 128);
if (nbytes < 0)
{
printf("read_test_file: ERROR failed to read from %s, errno=%d\n",
path, errno);
g_nerrors++;
}
else
{
buffer[127]='\0';
printf("read_test_file: Read \"%s\" from %s\n", buffer, path);
}
close(fd);
}
}
/****************************************************************************
* Name: write_test_file
****************************************************************************/
static void write_test_file(const char *path)
{
int fd;
/* Write a test file into a pre-existing file on the test file system */
printf("write_test_file: opening %s for writing\n", path);
fd = open(path, O_WRONLY|O_CREAT|O_TRUNC, 0644);
if (fd < 0)
{
printf("write_test_file: ERROR failed to open %s for writing, errno=%d\n",
path, errno);
g_nerrors++;
}
else
{
int nbytes = write(fd, g_testmsg, strlen(g_testmsg));
if (nbytes < 0)
{
printf("write_test_file: ERROR failed to write to %s, errno=%d\n",
path, errno);
g_nerrors++;
}
else
{
printf("write_test_file: wrote %d bytes to %s\n", nbytes, path);
}
close(fd);
}
}
/****************************************************************************
* Name: fail_mkdir
****************************************************************************/
static void fail_mkdir(const char *path, int expectederror)
{
int ret;
/* Try mkdir() against a file or directory. It should fail with expectederror */
printf("fail_mkdir: Try mkdir(%s)\n", path);
ret = mkdir(path, 0666);
if (ret == 0)
{
printf("fail_mkdir: ERROR mkdir(%s) succeeded\n", path);
g_nerrors++;
}
else if (errno != expectederror)
{
printf("fail_mkdir: ERROR mkdir(%s) failed with errno=%d (expected %d)\n",
path, errno, expectederror);
g_nerrors++;
}
}
/****************************************************************************
* Name: succeed_mkdir
****************************************************************************/
static void succeed_mkdir(const char *path)
{
int ret;
printf("succeed_mkdir: Try mkdir(%s)\n", path);
ret = mkdir(path, 0666);
if (ret != 0)
{
printf("succeed_mkdir: ERROR mkdir(%s) failed with errno=%d\n",
path, errno);
g_nerrors++;
}
}
/****************************************************************************
* Name: fail_rmdir
****************************************************************************/
static void fail_rmdir(const char *path, int expectederror)
{
int ret;
/* Try rmdir() against a file or directory. It should fail with expectederror */
printf("fail_rmdir: Try rmdir(%s)\n", path);
ret = rmdir(path);
if (ret == 0)
{
printf("fail_rmdir: ERROR rmdir(%s) succeeded\n", path);
g_nerrors++;
}
else if (errno != expectederror)
{
printf("fail_rmdir: ERROR rmdir(%s) failed with errno=%d (expected %d)\n",
path, errno, expectederror);
g_nerrors++;
}
}
/****************************************************************************
* Name: succeed_rmdir
****************************************************************************/
static void succeed_rmdir(const char *path)
{
int ret;
printf("succeed_rmdir: Try rmdir(%s)\n", path);
ret = rmdir(path);
if (ret != 0)
{
printf("succeed_rmdir: ERROR rmdir(%s) failed with errno=%d\n",
path, errno);
g_nerrors++;
}
}
/****************************************************************************
* Name: fail_unlink
****************************************************************************/
static void fail_unlink(const char *path, int expectederror)
{
int ret;
/* Try unlink() against a file or directory. It should fail with expectederror */
printf("fail_unlink: Try unlink(%s)\n", path);
ret = unlink(path);
if (ret == 0)
{
printf("fail_unlink: ERROR unlink(%s) succeeded\n", path);
g_nerrors++;
}
else if (errno != expectederror)
{
printf("fail_unlink: ERROR unlink(%s) failed with errno=%d (expected %d)\n",
path, errno, expectederror);
g_nerrors++;
}
}
/****************************************************************************
* Name: succeed_unlink
****************************************************************************/
static void succeed_unlink(const char *path)
{
int ret;
/* Try unlink() against the test file. It should succeed. */
printf("succeed_unlink: Try unlink(%s)\n", path);
ret = unlink(path);
if (ret != 0)
{
printf("succeed_unlink: ERROR unlink(%s) failed with errno=%d\n",
path, errno);
g_nerrors++;
}
}
/****************************************************************************
* Name: fail_rename
****************************************************************************/
static void fail_rename(const char *oldpath, const char *newpath, int expectederror)
{
int ret;
/* Try rename() against a file or directory. It should fail with expectederror */
printf("fail_rename: Try rename(%s->%s)\n", oldpath, newpath);
ret = rename(oldpath, newpath);
if (ret == 0)
{
printf("fail_rename: ERROR rename(%s->%s) succeeded\n",
oldpath, newpath);
g_nerrors++;
}
else if (errno != expectederror)
{
printf("fail_rename: ERROR rename(%s->%s) failed with errno=%d (expected %d)\n",
oldpath, newpath, errno, expectederror);
g_nerrors++;
}
}
/****************************************************************************
* Name: succeed_rename
****************************************************************************/
static void succeed_rename(const char *oldpath, const char *newpath)
{
int ret;
printf("succeed_rename: Try rename(%s->%s)\n", oldpath, newpath);
ret = rename(oldpath, newpath);
if (ret != 0)
{
printf("succeed_rename: ERROR rename(%s->%s) failed with errno=%d\n",
oldpath, newpath, errno);
g_nerrors++;
}
}
/****************************************************************************
* Name: fail_stat
****************************************************************************/
#ifdef TEST_USE_STAT
static void fail_stat(const char *path, int expectederror)
{
struct stat buf;
int ret;
/* Try stat() against a file or directory. It should fail with expectederror */
printf("fail_stat: Try stat(%s)\n", path);
ret = stat(path, &buf);
if (ret == 0)
{
printf("fail_stat: ERROR stat(%s) succeeded\n", path);
show_stat(path, &buf);
g_nerrors++;
}
else if (errno != expectederror)
{
printf("fail_stat: ERROR stat(%s) failed with errno=%d (expected %d)\n",
path, errno, expectederror);
g_nerrors++;
}
}
#else
# define fail_stat(p,e);
#endif
/****************************************************************************
* Name: succeed_stat
****************************************************************************/
#ifdef TEST_USE_STAT
static void succeed_stat(const char *path)
{
struct stat buf;
int ret;
printf("succeed_stat: Try stat(%s)\n", path);
ret = stat(path, &buf);
if (ret != 0)
{
printf("succeed_stat: ERROR stat(%s) failed with errno=%d\n",
path, errno);
g_nerrors++;
}
else
{
printf("succeed_stat: stat(%s) succeeded\n", path);
show_stat(path, &buf);
}
}
#else
#define succeed_stat(p)
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: mount_main
****************************************************************************/
int mount_main(int argc, char *argv[])
{
int ret;
#ifndef CONFIG_EXAMPLES_MOUNT_DEVNAME
/* Create a RAM disk for the test */
ret = create_ramdisk();
if (ret < 0)
{
printf("mount_main: ERROR failed to create RAM disk\n");
return 1;
}
#endif
/* Mount the test file system (see arch/sim/src/up_deviceimage.c */
printf("mount_main: mounting %s filesystem at target=%s with source=%s\n",
g_filesystemtype, g_target, g_source);
ret = mount(g_source, g_target, g_filesystemtype, 0, NULL);
printf("mount_main: mount() returned %d\n", ret);
if (ret == 0)
{
show_statfs(g_mntdir);
show_statfs(g_target);
#ifdef CONFIG_EXAMPLES_MOUNT_DEVNAME
/* Read a test file that is already on the test file system image */
show_directories("", 0);
succeed_stat(g_testfile1);
show_statfs(g_testfile1);
read_test_file(g_testfile1);
#else
/* Create the test directory that would have been on the canned filesystem */
succeed_mkdir(g_testdir1);
show_directories("", 0);
succeed_stat(g_testdir1);
show_statfs(g_testdir1);
#endif
/* Write a test file into a pre-existing directory on the test file system */
fail_stat(g_testfile2, ENOENT);
write_test_file(g_testfile2);
show_directories("", 0);
succeed_stat(g_testfile2);
show_statfs(g_testfile2);
/* Read the file that we just wrote */
read_test_file(g_testfile2);
/* Try rmdir() against a file on the directory. It should fail with ENOTDIR */
#ifdef CONFIG_EXAMPLES_MOUNT_DEVNAME
fail_rmdir(g_testfile1, ENOTDIR);
#endif
/* Try rmdir() against the test directory. It should fail with ENOTEMPTY */
fail_rmdir(g_testdir1, ENOTEMPTY);
/* Try unlink() against the test directory. It should fail with EISDIR */
fail_unlink(g_testdir1, EISDIR);
/* Try unlink() against the test file1. It should succeed. */
#ifdef CONFIG_EXAMPLES_MOUNT_DEVNAME
succeed_unlink(g_testfile1);
fail_stat(g_testfile1, ENOENT);
show_directories("", 0);
#endif
/* Attempt to open testfile1 should fail with ENOENT */
#ifdef CONFIG_EXAMPLES_MOUNT_DEVNAME
fail_read_open(g_testfile1, ENOENT);
#endif
/* Try rmdir() against the test directory. It should still fail with ENOTEMPTY */
fail_rmdir(g_testdir1, ENOTEMPTY);
/* Try mkdir() against the test file2. It should fail with EEXIST. */
fail_mkdir(g_testfile2, EEXIST);
/* Try unlink() against the test file2. It should succeed. */
succeed_unlink(g_testfile2);
show_directories("", 0);
fail_stat(g_testfile2, ENOENT);
/* Try mkdir() against the test dir1. It should fail with EEXIST. */
fail_mkdir(g_testdir1, EEXIST);
/* Try rmdir() against the test directory. mkdir should now succeed. */
succeed_rmdir(g_testdir1);
show_directories("", 0);
fail_stat(g_testdir1, ENOENT);
/* Try mkdir() against the test dir2. It should succeed */
succeed_mkdir(g_testdir2);
show_directories("", 0);
succeed_stat(g_testdir2);
show_statfs(g_testdir2);
/* Try mkdir() against the test dir2. It should fail with EXIST */
fail_mkdir(g_testdir2, EEXIST);
/* Write a test file into a new directory on the test file system */
fail_stat(g_testfile3, ENOENT);
write_test_file(g_testfile3);
show_directories("", 0);
succeed_stat(g_testfile3);
show_statfs(g_testfile3);
/* Read the file that we just wrote */
read_test_file(g_testfile3);
/* Use mkdir() to create test dir3. It should succeed */
fail_stat(g_testdir3, ENOENT);
succeed_mkdir(g_testdir3);
show_directories("", 0);
succeed_stat(g_testdir3);
show_statfs(g_testdir3);
/* Try rename() on the root directory. Should fail with EXDEV*/
fail_rename(g_target, g_testdir4, EXDEV);
/* Try rename() to an existing directory. Should fail with EEXIST */
fail_rename(g_testdir2, g_testdir3, EEXIST);
/* Try rename() to a non-existing directory. Should succeed */
fail_stat(g_testdir4, ENOENT);
succeed_rename(g_testdir3, g_testdir4);
show_directories("", 0);
fail_stat(g_testdir3, ENOENT);
succeed_stat(g_testdir4);
show_statfs(g_testdir4);
/* Try rename() of file. Should work. */
fail_stat(g_testfile4, ENOENT);
succeed_rename(g_testfile3, g_testfile4);
show_directories("", 0);
fail_stat(g_testfile3, ENOENT);
succeed_stat(g_testfile4);
show_statfs(g_testfile4);
/* Make sure that we can still read the renamed file */
read_test_file(g_testfile4);
/* Unmount the file system */
printf("mount_main: Try unmount(%s)\n", g_target);
ret = umount(g_target);
if (ret != 0)
{
printf("mount_main: ERROR umount() failed, errno %d\n", errno);
g_nerrors++;
}
printf("mount_main: %d errors reported\n", g_nerrors);
}
fflush(stdout);
return 0;
}