156 lines
4.3 KiB
C
156 lines
4.3 KiB
C
/****************************************************************************
|
|
* netutils/webserver/httpd_mmap.c
|
|
*
|
|
* Copyright (C) 2012 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 Header Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sys/mman.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <limits.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <apps/netutils/httpd.h>
|
|
|
|
#include "httpd.h"
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
int httpd_mmap_open(const char *name, struct httpd_fs_file *file)
|
|
{
|
|
char path[PATH_MAX];
|
|
struct stat st;
|
|
|
|
if (sizeof path < snprintf(path, sizeof path, "%s%s",
|
|
CONFIG_NETUTILS_HTTPD_PATH, name))
|
|
{
|
|
errno = ENAMETOOLONG;
|
|
return ERROR;
|
|
}
|
|
|
|
/* XXX: awaiting fstat to avoid a race */
|
|
|
|
if (-1 == stat(path, &st))
|
|
{
|
|
return ERROR;
|
|
}
|
|
|
|
if (S_ISDIR(st.st_mode))
|
|
{
|
|
errno = EISDIR;
|
|
return ERROR;
|
|
}
|
|
|
|
if (!S_ISREG(st.st_mode))
|
|
{
|
|
errno = ENOENT;
|
|
return ERROR;
|
|
}
|
|
|
|
if (st.st_size > INT_MAX)
|
|
{
|
|
errno = EFBIG;
|
|
return ERROR;
|
|
}
|
|
|
|
file->len = (int) st.st_size;
|
|
|
|
/* SUS3: "If len is zero, mmap() shall fail and no mapping shall be established." */
|
|
|
|
if (st.st_size == 0)
|
|
{
|
|
return OK;
|
|
}
|
|
|
|
file->fd = open(path, O_RDONLY);
|
|
if (file->fd == -1)
|
|
{
|
|
return ERROR;
|
|
}
|
|
|
|
file->data = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED | MAP_FILE, file->fd, 0);
|
|
if (file->data == MAP_FAILED)
|
|
{
|
|
(void) close(file->fd);
|
|
return ERROR;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
int httpd_mmap_close(struct httpd_fs_file *file)
|
|
{
|
|
if (file->len == 0)
|
|
{
|
|
return OK;
|
|
}
|
|
|
|
#ifdef CONFIG_FS_RAMMAP
|
|
if (-1 == munmap(file->data, file->len))
|
|
{
|
|
return ERROR;
|
|
}
|
|
#endif
|
|
|
|
if (-1 == close(file->fd))
|
|
{
|
|
return ERROR;
|
|
}
|
|
|
|
return OK;
|
|
}
|