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px4-firmware/apps/examples/romfs/romfs_main.c

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/****************************************************************************
* examples/romfs/romfs_main.c
*
* Copyright (C) 2008-2009, 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.
*
****************************************************************************/
/* Mount the ROMFS image, Verifty that it contains the
* following:
*
* testdir
* |---------- [drwxr-xr-x 4096] adir
* | |------ [-rw-r--r-- 21] anotherfile.txt
* | |------ [drwxr-xr-x 4096] subdir
* | | `-- [-rw-r--r-- 21] subdirfile.txt
* | `------ [-rw-r--r-- 25] yafile.txt
* |---------- [-rw-r--r-- 15] afile.txt
* |---------- [-rw-r--r-- 21] hfile
* `---------- [lrwxrwxrwx 11] ldir -> adir/subdir
*
* testdir/ldir is a soft-link and should not be detectable.
* hfile is a hardlink to subdirfile and should be identical
*/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <dirent.h>
#include <errno.h>
#include <nuttx/ramdisk.h>
#include "romfs_testdir.h"
/****************************************************************************
* Definitions
****************************************************************************/
/* Configuration settings */
#ifndef CONFIG_EXAMPLES_ROMFS_RAMDEVNO
# define CONFIG_EXAMPLES_ROMFS_RAMDEVNO 1
#endif
#ifndef CONFIG_EXAMPLES_ROMFS_SECTORSIZE
# define CONFIG_EXAMPLES_ROMFS_SECTORSIZE 64
#endif
#ifndef CONFIG_EXAMPLES_ROMFS_MOUNTPOINT
# define CONFIG_EXAMPLES_ROMFS_MOUNTPOINT "/usr/local/share"
#endif
#ifdef CONFIG_DISABLE_MOUNTPOINT
# error "Mountpoint support is disabled"
#endif
#if CONFIG_NFILE_DESCRIPTORS < 4
# error "Not enough file descriptors"
#endif
#ifndef CONFIG_FS_ROMFS
# error "ROMFS support not enabled"
#endif
#define NSECTORS(b) (((b)+CONFIG_EXAMPLES_ROMFS_SECTORSIZE-1)/CONFIG_EXAMPLES_ROMFS_SECTORSIZE)
#define STR_RAMDEVNO(m) #m
#define MKMOUNT_DEVNAME(m) "/dev/ram" STR_RAMDEVNO(m)
#define MOUNT_DEVNAME MKMOUNT_DEVNAME(CONFIG_EXAMPLES_ROMFS_RAMDEVNO)
#define SCRATCHBUFFER_SIZE 1024
/* Test directory stuff */
#define WRITABLE_MODE (S_IWOTH|S_IWGRP|S_IWUSR)
#define READABLE_MODE (S_IROTH|S_IRGRP|S_IRUSR)
#define EXECUTABLE_MODE (S_IXOTH|S_IXGRP|S_IXUSR)
#define DIRECTORY_MODE (S_IFDIR|READABLE_MODE|EXECUTABLE_MODE)
#define FILE_MODE (S_IFREG|READABLE_MODE)
/****************************************************************************
* Private Types
****************************************************************************/
struct node_s
{
struct node_s *peer; /* Next node in this directory */
bool directory; /* True: directory */
bool found; /* True: found and verified */
const char *name; /* Node name */
mode_t mode; /* Expected permissions */
size_t size; /* Expected size */
union
{
const char *filecontent; /* Context of text file */
struct node_s *child; /* Subdirectory start */
} u;
};
/****************************************************************************
* Private Data
****************************************************************************/
static const char g_afilecontent[] = "This is a file\n";
static const char g_anotherfilecontent[] = "This is another file\n";
static const char g_yafilecontent[] = "This is yet another file\n";
static const char g_subdirfilecontent[] = "File in subdirectory\n";
#define g_hfilecontent g_subdirfilecontent
static struct node_s g_adir;
static struct node_s g_afile;
static struct node_s g_hfile;
static struct node_s g_anotherfile;
static struct node_s g_subdir;
static struct node_s g_yafile;
static struct node_s g_subdirfile;
static int g_nerrors = 0;
static char g_scratchbuffer[SCRATCHBUFFER_SIZE];
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name:
****************************************************************************/
static void connectem(void)
{
g_adir.peer = &g_afile;
g_adir.directory = true;
g_adir.found = false;
g_adir.name = "adir";
g_adir.mode = DIRECTORY_MODE;
g_adir.size = 0;
g_adir.u.child = &g_anotherfile;
g_afile.peer = &g_hfile;
g_afile.directory = false;
g_afile.found = false;
g_afile.name = "afile.txt";
g_afile.mode = FILE_MODE;
g_afile.size = strlen(g_afilecontent);
g_afile.u.filecontent = g_afilecontent;
g_hfile.peer = NULL;
g_hfile.directory = false; /* Actually a hard link */
g_hfile.found = false;
g_hfile.name = "hfile";
g_hfile.mode = FILE_MODE;
g_hfile.size = strlen(g_hfilecontent);
g_hfile.u.filecontent = g_hfilecontent;
g_anotherfile.peer = &g_yafile;
g_anotherfile.directory = false;
g_anotherfile.found = false;
g_anotherfile.name = "anotherfile.txt";
g_anotherfile.mode = FILE_MODE;
g_anotherfile.size = strlen(g_anotherfilecontent);
g_anotherfile.u.filecontent = g_anotherfilecontent;
g_yafile.peer = &g_subdir;
g_yafile.directory = false;
g_yafile.found = false;
g_yafile.name = "yafile.txt";
g_yafile.mode = FILE_MODE;
g_yafile.size = strlen(g_yafilecontent);
g_yafile.u.filecontent = g_yafilecontent;
g_subdir.peer = NULL;
g_subdir.directory = true;
g_subdir.found = false;
g_subdir.name = "subdir";
g_subdir.mode = DIRECTORY_MODE;
g_subdir.size = 0;
g_subdir.u.child = &g_subdirfile;
g_subdirfile.peer = NULL;
g_subdirfile.directory = false;
g_subdirfile.found = false;
g_subdirfile.name = "subdirfile.txt";
g_subdirfile.mode = FILE_MODE;
g_subdirfile.size = strlen(g_subdirfilecontent);
g_subdirfile.u.filecontent = g_subdirfilecontent;
}
/****************************************************************************
* Name: findindirectory
****************************************************************************/
static struct node_s *findindirectory(struct node_s *entry, const char *name)
{
for (; entry; entry = entry->peer)
{
if (!entry->found && strcmp(entry->name, name) == 0)
{
entry->found = true;
return entry;
}
}
return NULL;
}
/****************************************************************************
* Name: checkattributes
****************************************************************************/
static void checkattributes(const char *path, mode_t mode, size_t size)
{
struct stat buf;
int ret;
ret = stat(path, &buf);
if (ret != 0)
{
printf(" -- ERROR: Failed to stat %s: %d\n", path, errno);
g_nerrors++;
return;
}
if (mode != buf.st_mode)
{
printf(" -- ERROR: Expected mode %08x, got %08x\n", mode, buf.st_mode);
g_nerrors++;
}
if (size != buf.st_size)
{
printf(" -- ERROR: Expected size %d, got %d\n", mode, buf.st_size);
g_nerrors++;
}
}
/****************************************************************************
* Name: checkfile
****************************************************************************/
static void checkfile(const char *path, struct node_s *node)
{
ssize_t nbytesread;
char *filedata;
int fd;
/* Open the file */
fd = open(path, O_RDONLY);
if (fd < 0)
{
printf(" -- ERROR: Failed to open %s: %d\n", path, errno);
g_nerrors++;
return;
}
/* Read and verify the file contents */
nbytesread = read(fd, g_scratchbuffer, SCRATCHBUFFER_SIZE);
if (nbytesread < 0)
{
printf(" -- ERROR: Failed to read from %s: %d\n", path, errno);
g_nerrors++;
}
else if (nbytesread != node->size)
{
printf(" -- ERROR: Read %d bytes, expected %d\n", nbytesread, node->size);
g_nerrors++;
}
else if (memcmp(g_scratchbuffer, node->u.filecontent, node->size) != 0)
{
g_scratchbuffer[nbytesread] = '\0';
printf(" -- ERROR: File content read does not match expectation:\n");
printf(" -- Read: [%s]\n", g_scratchbuffer);
printf(" -- Expected: [%s]\n", node->u.filecontent);
g_nerrors++;
}
/* Memory map and verify the file contents */
filedata = (char*)mmap(NULL, node->size, PROT_READ, MAP_SHARED|MAP_FILE, fd, 0);
if (!filedata || filedata == (char*)MAP_FAILED)
{
printf(" -- ERROR: mmap of %s failed: %d\n", path, errno);
g_nerrors++;
}
else
{
if (memcmp(filedata, node->u.filecontent, node->size) != 0)
{
memcpy(g_scratchbuffer, filedata, node->size);
g_scratchbuffer[node->size] = '\0';
printf(" -- ERROR: Mapped file content read does not match expectation:\n");
printf(" -- Memory: [%s]\n", filedata);
printf(" -- Expected: [%s]\n", node->u.filecontent);
g_nerrors++;
}
munmap(filedata, node->size);
}
/* Close the file */
if (close(fd) != OK)
{
printf(" -- ERROR: Failed to close %s: %d\n", path, errno);
g_nerrors++;
}
}
/****************************************************************************
* Name: readdirectories
****************************************************************************/
static void readdirectories(const char *path, struct node_s *entry)
{
DIR *dirp;
struct node_s *node;
struct dirent *direntry;
char *fullpath;
printf("Traversing directory: %s\n", path);
dirp = opendir(path);
if (!dirp)
{
printf(" ERROR opendir(\"%s\") failed: %d\n", path, errno);
g_nerrors++;
return;
}
for (direntry = readdir(dirp); direntry; direntry = readdir(dirp))
{
if (strcmp(direntry->d_name, ".") == 0 || strcmp(direntry->d_name, "..") == 0)
{
printf(" Skipping %s\n", direntry->d_name);
continue;
}
node = findindirectory(entry, direntry->d_name);
if (!node)
{
printf(" ERROR: No node found for %s\n", direntry->d_name);
g_nerrors++;
continue;
}
/* Get the full path to the entry */
sprintf(g_scratchbuffer, "%s/%s", path, direntry->d_name);
fullpath = strdup(g_scratchbuffer);
if (DIRENT_ISDIRECTORY(direntry->d_type))
{
printf(" DIRECTORY: %s/\n", fullpath);
if (!node->directory)
{
printf(" -- ERROR: Expected type directory\n");
g_nerrors++;
}
else
{
checkattributes(fullpath, node->mode, 0);
readdirectories(fullpath, node->u.child);
printf("Continuing directory: %s\n", path);
}
}
else
{
printf(" FILE: %s/\n", fullpath);
if (node->directory)
{
printf(" -- ERROR: Expected type file\n");
g_nerrors++;
}
else
{
checkattributes(fullpath, node->mode, node->size);
checkfile(fullpath, node);
}
}
free(fullpath);
}
closedir(dirp);
}
/****************************************************************************
* Name: checkdirectories
****************************************************************************/
static void checkdirectories(struct node_s *entry)
{
for (; entry; entry = entry->peer)
{
if (!entry->found )
{
printf("ERROR: %s never found\n", entry->name);
g_nerrors++;
}
if (entry->directory)
{
checkdirectories(entry->u.child);
}
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: romfs_main
****************************************************************************/
int romfs_main(int argc, char *argv[])
{
int ret;
/* Create a RAM disk for the test */
ret = romdisk_register(CONFIG_EXAMPLES_ROMFS_RAMDEVNO, testdir_img,
NSECTORS(testdir_img_len), CONFIG_EXAMPLES_ROMFS_SECTORSIZE);
if (ret < 0)
{
printf("ERROR: Failed to create RAM disk\n");
return 1;
}
/* Mount the test file system */
printf("Mounting ROMFS filesystem at target=%s with source=%s\n",
CONFIG_EXAMPLES_ROMFS_MOUNTPOINT, MOUNT_DEVNAME);
ret = mount(MOUNT_DEVNAME, CONFIG_EXAMPLES_ROMFS_MOUNTPOINT, "romfs", MS_RDONLY, NULL);
if (ret < 0)
{
printf("ERROR: Mount failed: %d\n", errno);
return 1;
}
/* Perform the test */
connectem();
readdirectories(CONFIG_EXAMPLES_ROMFS_MOUNTPOINT, &g_adir);
checkdirectories(&g_adir);
if (g_nerrors)
{
printf("Finished with %d errors\n", g_nerrors);
return g_nerrors;
}
printf("PASSED\n");
return 0;
}
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