/****************************************************************************
* apps/examples/module/module_main.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/boardctl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <syslog.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/module.h>
#include <nuttx/symtab.h>
#if defined(CONFIG_EXAMPLES_MODULE_ROMFS)
# include <nuttx/drivers/ramdisk.h>
#endif
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Check configuration. This is not all of the configuration settings that
* are required -- only the more obvious.
*/
#ifndef CONFIG_MODULE
# error "You must select CONFIG_MODULE in your configuration file"
#endif
#if defined(CONFIG_EXAMPLES_MODULE_BUILTINFS)
# if !defined(CONFIG_FS_ROMFS) && !defined(CONFIG_FS_CROMFS)
# error "You must select CONFIG_FS_ROMFS or CONFIG_FS_CROMFS in your configuration file"
# endif
# ifdef CONFIG_DISABLE_MOUNTPOINT
# error "You must not disable mountpoints via CONFIG_DISABLE_MOUNTPOINT in your configuration file"
# endif
# if defined(CONFIG_EXAMPLES_MODULE_ROMFS)
/* Describe the ROMFS file system */
# define SECTORSIZE 64
# define NSECTORS(b) (((b)+SECTORSIZE-1)/SECTORSIZE)
# define MOUNTPT "/mnt/romfs"
# ifndef CONFIG_EXAMPLES_MODULE_DEVMINOR
# define CONFIG_EXAMPLES_MODULE_DEVMINOR 0
# endif
# ifndef CONFIG_EXAMPLES_MODULE_DEVPATH
# define CONFIG_EXAMPLES_MODULE_DEVPATH "/dev/ram0"
# endif
# elif defined(CONFIG_EXAMPLES_MODULE_CROMFS)
/* Describe the CROMFS file system */
# define MOUNTPT "/mnt/cromfs"
# endif
# define BINDIR MOUNTPT
#elif defined(CONFIG_EXAMPLES_MODULE_FSMOUNT)
/* Describe how to auto-mount the external file system */
# define MOUNTPT "/mnt/" CONFIG_EXAMPLES_MODULE_FSTYPE
# define BINDIR MOUNTPT
#else
/* Describe how to use the pre-mounted external file system */
# define BINDIR CONFIG_EXAMPLES_MODULE_BINDIR
#endif /* CONFIG_EXAMPLES_MODULE_BUILTINFS */
/****************************************************************************
* Private data
****************************************************************************/
static const char g_write_string[] = "Hi there installed driver\n";
/****************************************************************************
* Symbols from Auto-Generated Code
****************************************************************************/
#if defined(CONFIG_EXAMPLES_MODULE_ROMFS) || defined(CONFIG_EXAMPLES_MODULE_CROMFS)
extern const unsigned char romfs_img[];
extern const unsigned int romfs_img_len;
#endif
#ifdef CONFIG_BUILD_FLAT
extern const struct symtab_s g_mod_exports[];
extern const int g_mod_nexports;
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: module_main
****************************************************************************/
int main(int argc, FAR char *argv[])
{
#ifdef CONFIG_BUILD_FLAT
struct boardioc_symtab_s symdesc;
#endif
#if defined(CONFIG_EXAMPLES_MODULE_BUILTINFS) && \
defined(CONFIG_EXAMPLES_MODULE_ROMFS)
struct boardioc_romdisk_s desc;
#endif
#if defined(CONFIG_EXAMPLES_MODULE_FSMOUNT) && \
defined(CONFIG_EXAMPLES_MODULE_FSREMOVEABLE)
struct stat buf;
#endif
FAR void *handle;
char buffer[128];
ssize_t nbytes;
int ret;
int fd;
#ifdef CONFIG_BUILD_FLAT
/* Set the OS symbol table indirectly through the boardctl() */
symdesc.symtab = (FAR struct symtab_s *)g_mod_exports;
symdesc.nsymbols = g_mod_nexports;
ret = boardctl(BOARDIOC_OS_SYMTAB, (uintptr_t)&symdesc);
if (ret < 0)
{
fprintf(stderr, "ERROR: boardctl(BOARDIOC_OS_SYMTAB) failed: %s\n",
strerror(errno));
exit(EXIT_FAILURE);
}
#endif
#ifdef CONFIG_EXAMPLES_MODULE_BUILTINFS
#if defined(CONFIG_EXAMPLES_MODULE_ROMFS)
/* Create a ROM disk for the ROMFS filesystem */
printf("main: Registering romdisk at /dev/ram%d\n",
CONFIG_EXAMPLES_MODULE_DEVMINOR);
desc.minor = CONFIG_EXAMPLES_MODULE_DEVMINOR; /* Minor device number of the ROM disk. */
desc.nsectors = NSECTORS(romfs_img_len); /* The number of sectors in the ROM disk */
desc.sectsize = SECTORSIZE; /* The size of one sector in bytes */
desc.image = (FAR uint8_t *)romfs_img; /* File system image */
ret = boardctl(BOARDIOC_ROMDISK, (uintptr_t)&desc);
if (ret < 0)
{
fprintf(stderr, "ERROR: romdisk_register failed: %s\n",
strerror(errno));
exit(EXIT_FAILURE);
}
/* Mount the file system */
printf("main: Mounting ROMFS filesystem at target=%s with source=%s\n",
MOUNTPT, CONFIG_EXAMPLES_MODULE_DEVPATH);
ret = mount(CONFIG_EXAMPLES_MODULE_DEVPATH, MOUNTPT, "romfs",
MS_RDONLY, NULL);
if (ret < 0)
{
fprintf(stderr, "ERROR: mount(%s,%s,romfs) failed: %s\n",
CONFIG_EXAMPLES_MODULE_DEVPATH, MOUNTPT, strerror(errno));
exit(EXIT_FAILURE);
}
#elif defined(CONFIG_EXAMPLES_MODULE_CROMFS)
/* Mount the CROMFS file system */
printf("Mounting CROMFS filesystem at target=%s\n", MOUNTPT);
ret = mount(NULL, MOUNTPT, "cromfs", MS_RDONLY, NULL);
if (ret < 0)
{
errmsg("ERROR: mount(%s, cromfs) failed: %d\n", MOUNTPT, errno);
}
#endif /* CONFIG_EXAMPLES_MODULE_ROMFS */
#else /* CONFIG_EXAMPLES_MODULE_BUILTINFS */
/* An external file system is being used */
#if defined(CONFIG_EXAMPLES_MODULE_FSMOUNT)
#if defined(CONFIG_EXAMPLES_MODULE_FSREMOVEABLE)
/* The file system is removable, wait until the block driver is available */
do
{
ret = stat(CONFIG_EXAMPLES_MODULE_DEVPATH, &buf);
if (ret < 0)
{
int errcode = errno;
if (errcode == ENOENT)
{
printf("%s does not exist. Waiting...\n",
CONFIG_EXAMPLES_MODULE_DEVPATH);
sleep(1);
}
else
{
printf("ERROR: stat(%s) failed: %d Aborting...\n",
CONFIG_EXAMPLES_MODULE_DEVPATH, errcode);
exit(EXIT_FAILURE);
}
}
else if (!S_ISBLK(buf.st_mode))
{
printf("ERROR: stat(%s) exists but is not a block driver: %04x\n",
CONFIG_EXAMPLES_MODULE_DEVPATH, buf.st_mode);
exit(EXIT_FAILURE);
}
}
while (ret < 0);
#endif /* CONFIG_EXAMPLES_MODULE_FSREMOVEABLE */
/* Mount the external file system */
printf("Mounting %s filesystem at target=%s\n",
CONFIG_EXAMPLES_MODULE_FSTYPE, MOUNTPT);
ret = mount(CONFIG_EXAMPLES_MODULE_DEVPATH, MOUNTPT,
CONFIG_EXAMPLES_MODULE_FSTYPE, MS_RDONLY, NULL);
if (ret < 0)
{
printf("ERROR: mount(%s, %s, %s) failed: %d\n",
CONFIG_EXAMPLES_MODULE_DEVPATH, CONFIG_EXAMPLES_MODULE_FSTYPE,
MOUNTPT, errno);
}
#endif /* CONFIG_EXAMPLES_MODULE_FSMOUNT */
#endif /* CONFIG_EXAMPLES_MODULE_BUILTINFS */
/* Install the character driver */
handle = insmod(BINDIR "/chardev", "chardev");
if (handle == NULL)
{
int errcode = errno;
fprintf(stderr, "ERROR: insmod(%s/chardev, chardev) failed: %d\n",
BINDIR, errcode);
exit(EXIT_FAILURE);
}
/* Open the installed character driver */
fd = open("/dev/chardev", O_RDWR);
if (fd < 0)
{
int errcode = errno;
fprintf(stderr, "ERROR: Failed to open /dev/chardev: %d\n", errcode);
exit(EXIT_FAILURE);
}
/* Read from the character driver */
nbytes = read(fd, buffer, 128);
if (nbytes < 0)
{
int errcode = errno;
fprintf(stderr, "ERROR: Read from /dev/chardev failed: %d\n", errcode);
close(fd);
exit(EXIT_FAILURE);
}
printf("main: Read %d bytes\n", (int)nbytes);
lib_dumpbuffer("main: Bytes read", (FAR const uint8_t *)buffer, nbytes);
/* Write to the character driver */
nbytes = write(fd, g_write_string, strlen(g_write_string));
if (nbytes < 0)
{
int errcode = errno;
fprintf(stderr, "ERROR: Write to /dev/chardev failed: %d\n", errcode);
close(fd);
exit(EXIT_FAILURE);
}
printf("main: Wrote %d bytes\n", (int)nbytes);
lib_dumpbuffer("main: Bytes written", (FAR const uint8_t *)g_write_string,
nbytes);
close(fd);
ret = rmmod(handle);
if (ret < 0)
{
fprintf(stderr, "ERROR: rmmod failed: %d\n", ret);
exit(EXIT_FAILURE);
}
return EXIT_SUCCESS;
}