| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * 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. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR |
| * ITS 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| #include "apr_lib.h" |
| #include "apr_file_io.h" |
| #include "ap_buckets.h" |
| #include <stdlib.h> |
| |
| /* Allow Apache to use ap_mmap */ |
| #ifdef AP_USE_MMAP_FILES |
| #include "apr_mmap.h" |
| |
| /* mmap support for static files based on ideas from John Heidemann's |
| * patch against 1.0.5. See |
| * <http://www.isi.edu/~johnh/SOFTWARE/APACHE/index.html>. |
| */ |
| |
| /* Files have to be at least this big before they're mmap()d. This is to deal |
| * with systems where the expense of doing an mmap() and an munmap() outweighs |
| * the benefit for small files. It shouldn't be set lower than 1. |
| */ |
| #ifndef MMAP_THRESHOLD |
| # ifdef SUNOS4 |
| # define MMAP_THRESHOLD (8*1024) |
| # else |
| # define MMAP_THRESHOLD 1 |
| # endif /* SUNOS4 */ |
| #endif /* MMAP_THRESHOLD */ |
| #ifndef MMAP_LIMIT |
| #define MMAP_LIMIT (4*1024*1024) |
| #endif |
| #endif /* AP_USE_MMAP_FILES */ |
| |
| |
| /* XXX: We should obey the block flag */ |
| static apr_status_t file_read(ap_bucket *e, const char **str, |
| apr_size_t *len, ap_read_type block) |
| { |
| ap_bucket_file *a = (ap_bucket_file *)e->data; |
| apr_file_t *f = (apr_file_t *) a->fd; |
| ap_bucket *b = NULL; |
| char *buf; |
| apr_status_t rv; |
| #ifdef AP_USE_MMAP_FILES |
| apr_mmap_t *mm = NULL; |
| #endif |
| |
| #ifdef AP_USE_MMAP_FILES |
| if ((e->length >= MMAP_THRESHOLD) |
| && (e->length < MMAP_LIMIT)) { |
| /* we need to protect ourselves in case we die while we've got the |
| * file mmapped */ |
| apr_status_t status; |
| if ((status = apr_mmap_create(&mm, f, a->offset, e->length, |
| APR_MMAP_READ, NULL)) != APR_SUCCESS) { |
| mm = NULL; |
| } |
| } |
| else { |
| mm = NULL; |
| } |
| if (mm) { |
| ap_bucket_make_mmap(e, mm, 0, e->length); /*XXX: check for failure? */ |
| return ap_bucket_read(e, str, len, block); |
| } |
| else { |
| #endif |
| |
| buf = malloc(HUGE_STRING_LEN); |
| *str = buf; |
| |
| if (e->length > HUGE_STRING_LEN) { |
| *len = HUGE_STRING_LEN; |
| } |
| else { |
| *len = e->length; |
| } |
| |
| /* Handle offset ... */ |
| if (a->offset) { |
| rv = apr_seek(f, APR_SET, &a->offset); |
| if (rv != APR_SUCCESS) { |
| free(buf); |
| return rv; |
| } |
| /* Only need to do seek the first time through */ |
| a->offset = 0; |
| } |
| rv = apr_read(f, buf, len); |
| if (rv != APR_SUCCESS && rv != APR_EOF) { |
| free(buf); |
| return rv; |
| } |
| |
| /* |
| * Change the current bucket to refer to what we read, |
| * even if we read nothing because we hit EOF. |
| */ |
| ap_bucket_make_heap(e, buf, *len, 0, NULL); /*XXX: check for failure? */ |
| |
| /* If we have more to read from the file, then create another bucket */ |
| if (*len > 0) { |
| b = ap_bucket_create_file(f, 0, e->length); |
| AP_BUCKET_INSERT_AFTER(e, b); |
| } |
| #ifdef AP_USE_MMAP_FILES |
| } |
| #endif |
| return APR_SUCCESS; |
| } |
| |
| APR_DECLARE(ap_bucket *) ap_bucket_make_file(ap_bucket *b, apr_file_t *fd, |
| apr_off_t offset, apr_size_t len) |
| { |
| ap_bucket_file *f; |
| |
| f = malloc(sizeof(*f)); |
| if (f == NULL) { |
| return NULL; |
| } |
| |
| f->fd = fd; |
| f->offset = offset; |
| |
| b->type = &ap_file_type; |
| b->data = f; |
| b->length = len; |
| |
| return b; |
| } |
| |
| APR_DECLARE(ap_bucket *) ap_bucket_create_file(apr_file_t *fd, |
| apr_off_t offset, apr_size_t len) |
| { |
| ap_bucket_do_create(ap_bucket_make_file(b, fd, offset, len)); |
| } |
| |
| APR_DECLARE_DATA const ap_bucket_type ap_file_type = { |
| "FILE", 5, |
| ap_bucket_destroy_notimpl, |
| file_read, |
| ap_bucket_setaside_notimpl, |
| ap_bucket_split_notimpl, |
| ap_bucket_copy_notimpl |
| }; |
