mirror of
https://github.com/php/php-src.git
synced 2024-12-12 11:23:53 +08:00
357 lines
11 KiB
C
357 lines
11 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| Zend Engine |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) 1998-2015 Zend Technologies Ltd. (http://www.zend.com) |
|
|
+----------------------------------------------------------------------+
|
|
| This source file is subject to version 2.00 of the Zend license, |
|
|
| that is bundled with this package in the file LICENSE, and is |
|
|
| available through the world-wide-web at the following url: |
|
|
| http://www.zend.com/license/2_00.txt. |
|
|
| If you did not receive a copy of the Zend license and are unable to |
|
|
| obtain it through the world-wide-web, please send a note to |
|
|
| license@zend.com so we can mail you a copy immediately. |
|
|
+----------------------------------------------------------------------+
|
|
| Authors: Wez Furlong <wez@thebrainroom.com> |
|
|
| Scott MacVicar <scottmac@php.net> |
|
|
| Nuno Lopes <nlopess@php.net> |
|
|
| Marcus Boerger <helly@php.net> |
|
|
+----------------------------------------------------------------------+
|
|
*/
|
|
|
|
/* $Id$ */
|
|
|
|
|
|
#include "zend.h"
|
|
#include "zend_compile.h"
|
|
#include "zend_stream.h"
|
|
|
|
#if HAVE_MMAP
|
|
# if HAVE_UNISTD_H
|
|
# include <unistd.h>
|
|
# if defined(_SC_PAGESIZE)
|
|
# define REAL_PAGE_SIZE sysconf(_SC_PAGESIZE);
|
|
# elif defined(_SC_PAGE_SIZE)
|
|
# define REAL_PAGE_SIZE sysconf(_SC_PAGE_SIZE);
|
|
# endif
|
|
# endif
|
|
# if HAVE_SYS_MMAN_H
|
|
# include <sys/mman.h>
|
|
# endif
|
|
# ifndef REAL_PAGE_SIZE
|
|
# ifdef PAGE_SIZE
|
|
# define REAL_PAGE_SIZE PAGE_SIZE
|
|
# else
|
|
# define REAL_PAGE_SIZE 4096
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
ZEND_DLIMPORT int isatty(int fd);
|
|
|
|
static size_t zend_stream_stdio_reader(void *handle, char *buf, size_t len) /* {{{ */
|
|
{
|
|
return fread(buf, 1, len, (FILE*)handle);
|
|
} /* }}} */
|
|
|
|
static void zend_stream_stdio_closer(void *handle) /* {{{ */
|
|
{
|
|
if (handle && (FILE*)handle != stdin) {
|
|
fclose((FILE*)handle);
|
|
}
|
|
} /* }}} */
|
|
|
|
static size_t zend_stream_stdio_fsizer(void *handle) /* {{{ */
|
|
{
|
|
zend_stat_t buf;
|
|
if (handle && zend_fstat(fileno((FILE*)handle), &buf) == 0) {
|
|
#ifdef S_ISREG
|
|
if (!S_ISREG(buf.st_mode)) {
|
|
return 0;
|
|
}
|
|
#endif
|
|
return buf.st_size;
|
|
}
|
|
return 0;
|
|
} /* }}} */
|
|
|
|
static void zend_stream_unmap(zend_stream *stream) { /* {{{ */
|
|
#if HAVE_MMAP
|
|
if (stream->mmap.map) {
|
|
munmap(stream->mmap.map, stream->mmap.len + ZEND_MMAP_AHEAD);
|
|
} else
|
|
#endif
|
|
if (stream->mmap.buf) {
|
|
efree(stream->mmap.buf);
|
|
}
|
|
stream->mmap.len = 0;
|
|
stream->mmap.pos = 0;
|
|
stream->mmap.map = 0;
|
|
stream->mmap.buf = 0;
|
|
stream->handle = stream->mmap.old_handle;
|
|
} /* }}} */
|
|
|
|
static void zend_stream_mmap_closer(zend_stream *stream) /* {{{ */
|
|
{
|
|
zend_stream_unmap(stream);
|
|
if (stream->mmap.old_closer && stream->handle) {
|
|
stream->mmap.old_closer(stream->handle);
|
|
}
|
|
} /* }}} */
|
|
|
|
static inline int zend_stream_is_mmap(zend_file_handle *file_handle) { /* {{{ */
|
|
return file_handle->type == ZEND_HANDLE_MAPPED;
|
|
} /* }}} */
|
|
|
|
static size_t zend_stream_fsize(zend_file_handle *file_handle) /* {{{ */
|
|
{
|
|
zend_stat_t buf;
|
|
|
|
if (zend_stream_is_mmap(file_handle)) {
|
|
return file_handle->handle.stream.mmap.len;
|
|
}
|
|
if (file_handle->type == ZEND_HANDLE_STREAM || file_handle->type == ZEND_HANDLE_MAPPED) {
|
|
return file_handle->handle.stream.fsizer(file_handle->handle.stream.handle);
|
|
}
|
|
if (file_handle->handle.fp && zend_fstat(fileno(file_handle->handle.fp), &buf) == 0) {
|
|
#ifdef S_ISREG
|
|
if (!S_ISREG(buf.st_mode)) {
|
|
return 0;
|
|
}
|
|
#endif
|
|
return buf.st_size;
|
|
}
|
|
|
|
return -1;
|
|
} /* }}} */
|
|
|
|
ZEND_API int zend_stream_open(const char *filename, zend_file_handle *handle) /* {{{ */
|
|
{
|
|
if (zend_stream_open_function) {
|
|
return zend_stream_open_function(filename, handle);
|
|
}
|
|
handle->type = ZEND_HANDLE_FP;
|
|
handle->opened_path = NULL;
|
|
handle->handle.fp = zend_fopen(filename, &handle->opened_path);
|
|
handle->filename = filename;
|
|
handle->free_filename = 0;
|
|
memset(&handle->handle.stream.mmap, 0, sizeof(zend_mmap));
|
|
|
|
return (handle->handle.fp) ? SUCCESS : FAILURE;
|
|
} /* }}} */
|
|
|
|
static int zend_stream_getc(zend_file_handle *file_handle) /* {{{ */
|
|
{
|
|
char buf;
|
|
|
|
if (file_handle->handle.stream.reader(file_handle->handle.stream.handle, &buf, sizeof(buf))) {
|
|
return (int)buf;
|
|
}
|
|
return EOF;
|
|
} /* }}} */
|
|
|
|
static size_t zend_stream_read(zend_file_handle *file_handle, char *buf, size_t len) /* {{{ */
|
|
{
|
|
if (!zend_stream_is_mmap(file_handle) && file_handle->handle.stream.isatty) {
|
|
int c = '*';
|
|
size_t n;
|
|
|
|
#ifdef NETWARE
|
|
/*
|
|
c != 4 check is there as fread of a character in NetWare LibC gives 4 upon ^D character.
|
|
Ascii value 4 is actually EOT character which is not defined anywhere in the LibC
|
|
or else we can use instead of hardcoded 4.
|
|
*/
|
|
for (n = 0; n < len && (c = zend_stream_getc(file_handle)) != EOF && c != 4 && c != '\n'; ++n) {
|
|
#else
|
|
for (n = 0; n < len && (c = zend_stream_getc(file_handle)) != EOF && c != '\n'; ++n) {
|
|
#endif
|
|
buf[n] = (char)c;
|
|
}
|
|
if (c == '\n') {
|
|
buf[n++] = (char)c;
|
|
}
|
|
|
|
return n;
|
|
}
|
|
return file_handle->handle.stream.reader(file_handle->handle.stream.handle, buf, len);
|
|
} /* }}} */
|
|
|
|
ZEND_API int zend_stream_fixup(zend_file_handle *file_handle, char **buf, size_t *len) /* {{{ */
|
|
{
|
|
size_t size;
|
|
zend_stream_type old_type;
|
|
|
|
if (file_handle->type == ZEND_HANDLE_FILENAME) {
|
|
if (zend_stream_open(file_handle->filename, file_handle) == FAILURE) {
|
|
return FAILURE;
|
|
}
|
|
}
|
|
|
|
switch (file_handle->type) {
|
|
case ZEND_HANDLE_FD:
|
|
file_handle->type = ZEND_HANDLE_FP;
|
|
file_handle->handle.fp = fdopen(file_handle->handle.fd, "rb");
|
|
/* no break; */
|
|
case ZEND_HANDLE_FP:
|
|
if (!file_handle->handle.fp) {
|
|
return FAILURE;
|
|
}
|
|
memset(&file_handle->handle.stream.mmap, 0, sizeof(zend_mmap));
|
|
file_handle->handle.stream.isatty = isatty(fileno((FILE *)file_handle->handle.stream.handle)) ? 1 : 0;
|
|
file_handle->handle.stream.reader = (zend_stream_reader_t)zend_stream_stdio_reader;
|
|
file_handle->handle.stream.closer = (zend_stream_closer_t)zend_stream_stdio_closer;
|
|
file_handle->handle.stream.fsizer = (zend_stream_fsizer_t)zend_stream_stdio_fsizer;
|
|
memset(&file_handle->handle.stream.mmap, 0, sizeof(file_handle->handle.stream.mmap));
|
|
/* no break; */
|
|
case ZEND_HANDLE_STREAM:
|
|
/* nothing to do */
|
|
break;
|
|
|
|
case ZEND_HANDLE_MAPPED:
|
|
file_handle->handle.stream.mmap.pos = 0;
|
|
*buf = file_handle->handle.stream.mmap.buf;
|
|
*len = file_handle->handle.stream.mmap.len;
|
|
return SUCCESS;
|
|
|
|
default:
|
|
return FAILURE;
|
|
}
|
|
|
|
size = zend_stream_fsize(file_handle);
|
|
if (size == (size_t)-1) {
|
|
return FAILURE;
|
|
}
|
|
|
|
old_type = file_handle->type;
|
|
file_handle->type = ZEND_HANDLE_STREAM; /* we might still be _FP but we need fsize() work */
|
|
|
|
if (old_type == ZEND_HANDLE_FP && !file_handle->handle.stream.isatty && size) {
|
|
#if HAVE_MMAP
|
|
size_t page_size = REAL_PAGE_SIZE;
|
|
|
|
if (file_handle->handle.fp &&
|
|
size != 0 &&
|
|
((size - 1) % page_size) <= page_size - ZEND_MMAP_AHEAD) {
|
|
/* *buf[size] is zeroed automatically by the kernel */
|
|
*buf = mmap(0, size + ZEND_MMAP_AHEAD, PROT_READ, MAP_PRIVATE, fileno(file_handle->handle.fp), 0);
|
|
if (*buf != MAP_FAILED) {
|
|
zend_long offset = ftell(file_handle->handle.fp);
|
|
file_handle->handle.stream.mmap.map = *buf;
|
|
|
|
if (offset != -1) {
|
|
*buf += offset;
|
|
size -= offset;
|
|
}
|
|
file_handle->handle.stream.mmap.buf = *buf;
|
|
file_handle->handle.stream.mmap.len = size;
|
|
|
|
goto return_mapped;
|
|
}
|
|
}
|
|
#endif
|
|
file_handle->handle.stream.mmap.map = 0;
|
|
file_handle->handle.stream.mmap.buf = *buf = safe_emalloc(1, size, ZEND_MMAP_AHEAD);
|
|
file_handle->handle.stream.mmap.len = zend_stream_read(file_handle, *buf, size);
|
|
} else {
|
|
size_t read, remain = 4*1024;
|
|
*buf = emalloc(remain);
|
|
size = 0;
|
|
|
|
while ((read = zend_stream_read(file_handle, *buf + size, remain)) > 0) {
|
|
size += read;
|
|
remain -= read;
|
|
|
|
if (remain == 0) {
|
|
*buf = safe_erealloc(*buf, size, 2, 0);
|
|
remain = size;
|
|
}
|
|
}
|
|
file_handle->handle.stream.mmap.map = 0;
|
|
file_handle->handle.stream.mmap.len = size;
|
|
if (size && remain < ZEND_MMAP_AHEAD) {
|
|
*buf = safe_erealloc(*buf, size, 1, ZEND_MMAP_AHEAD);
|
|
}
|
|
file_handle->handle.stream.mmap.buf = *buf;
|
|
}
|
|
|
|
if (file_handle->handle.stream.mmap.len == 0) {
|
|
*buf = erealloc(*buf, ZEND_MMAP_AHEAD);
|
|
file_handle->handle.stream.mmap.buf = *buf;
|
|
}
|
|
|
|
if (ZEND_MMAP_AHEAD) {
|
|
memset(file_handle->handle.stream.mmap.buf + file_handle->handle.stream.mmap.len, 0, ZEND_MMAP_AHEAD);
|
|
}
|
|
#if HAVE_MMAP
|
|
return_mapped:
|
|
#endif
|
|
file_handle->type = ZEND_HANDLE_MAPPED;
|
|
file_handle->handle.stream.mmap.pos = 0;
|
|
file_handle->handle.stream.mmap.old_handle = file_handle->handle.stream.handle;
|
|
file_handle->handle.stream.mmap.old_closer = file_handle->handle.stream.closer;
|
|
file_handle->handle.stream.handle = &file_handle->handle.stream;
|
|
file_handle->handle.stream.closer = (zend_stream_closer_t)zend_stream_mmap_closer;
|
|
|
|
*buf = file_handle->handle.stream.mmap.buf;
|
|
*len = file_handle->handle.stream.mmap.len;
|
|
|
|
return SUCCESS;
|
|
} /* }}} */
|
|
|
|
ZEND_API void zend_file_handle_dtor(zend_file_handle *fh) /* {{{ */
|
|
{
|
|
switch (fh->type) {
|
|
case ZEND_HANDLE_FD:
|
|
/* nothing to do */
|
|
break;
|
|
case ZEND_HANDLE_FP:
|
|
fclose(fh->handle.fp);
|
|
break;
|
|
case ZEND_HANDLE_STREAM:
|
|
case ZEND_HANDLE_MAPPED:
|
|
if (fh->handle.stream.closer && fh->handle.stream.handle) {
|
|
fh->handle.stream.closer(fh->handle.stream.handle);
|
|
}
|
|
fh->handle.stream.handle = NULL;
|
|
break;
|
|
case ZEND_HANDLE_FILENAME:
|
|
/* We're only supposed to get here when destructing the used_files hash,
|
|
* which doesn't really contain open files, but references to their names/paths
|
|
*/
|
|
break;
|
|
}
|
|
if (fh->opened_path) {
|
|
zend_string_release(fh->opened_path);
|
|
fh->opened_path = NULL;
|
|
}
|
|
if (fh->free_filename && fh->filename) {
|
|
efree((char*)fh->filename);
|
|
fh->filename = NULL;
|
|
}
|
|
}
|
|
/* }}} */
|
|
|
|
ZEND_API int zend_compare_file_handles(zend_file_handle *fh1, zend_file_handle *fh2) /* {{{ */
|
|
{
|
|
if (fh1->type != fh2->type) {
|
|
return 0;
|
|
}
|
|
switch (fh1->type) {
|
|
case ZEND_HANDLE_FD:
|
|
return fh1->handle.fd == fh2->handle.fd;
|
|
case ZEND_HANDLE_FP:
|
|
return fh1->handle.fp == fh2->handle.fp;
|
|
case ZEND_HANDLE_STREAM:
|
|
return fh1->handle.stream.handle == fh2->handle.stream.handle;
|
|
case ZEND_HANDLE_MAPPED:
|
|
return (fh1->handle.stream.handle == &fh1->handle.stream &&
|
|
fh2->handle.stream.handle == &fh2->handle.stream &&
|
|
fh1->handle.stream.mmap.old_handle == fh2->handle.stream.mmap.old_handle)
|
|
|| fh1->handle.stream.handle == fh2->handle.stream.handle;
|
|
default:
|
|
return 0;
|
|
}
|
|
return 0;
|
|
} /* }}} */
|