diff options
Diffstat (limited to 'apps/netutils/webserver/httpd_mmap.c')
-rw-r--r-- | apps/netutils/webserver/httpd_mmap.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/apps/netutils/webserver/httpd_mmap.c b/apps/netutils/webserver/httpd_mmap.c new file mode 100644 index 000000000..301168a09 --- /dev/null +++ b/apps/netutils/webserver/httpd_mmap.c @@ -0,0 +1,131 @@ +/**************************************************************************** + * 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 (st.st_size > INT_MAX) + { + errno = EFBIG; + return ERROR; + } + + 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; + } + + file->len = (int) st.st_size; + + return OK; +} + +int httpd_mmap_close(struct httpd_fs_file *file) +{ +#ifdef CONFIG_FS_RAMMAP + if (-1 == munmap(file->data, file->len)) + { + return ERROR; + } +#endif + + if (-1 == close(file->fd)) + { + return ERROR; + } + + return OK; +} |