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plain_wrapper.c
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/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Wez Furlong <[email protected]> |
+----------------------------------------------------------------------+
*/
#include "php.h"
#include "php_globals.h"
#include "php_network.h"
#include "php_open_temporary_file.h"
#include "ext/standard/file.h"
#include "ext/standard/flock_compat.h"
#include "ext/standard/php_filestat.h"
#include <stddef.h>
#include <fcntl.h>
#if HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#if HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#include "SAPI.h"
#include "php_streams_int.h"
#ifdef PHP_WIN32
# include "win32/winutil.h"
# include "win32/time.h"
# include "win32/ioutil.h"
# include "win32/readdir.h"
# include <limits.h>
#endif
#define php_stream_fopen_from_fd_int(fd, mode, persistent_id) _php_stream_fopen_from_fd_int((fd), (mode), (persistent_id) STREAMS_CC)
#define php_stream_fopen_from_fd_int_rel(fd, mode, persistent_id) _php_stream_fopen_from_fd_int((fd), (mode), (persistent_id) STREAMS_REL_CC)
#define php_stream_fopen_from_file_int(file, mode) _php_stream_fopen_from_file_int((file), (mode) STREAMS_CC)
#define php_stream_fopen_from_file_int_rel(file, mode) _php_stream_fopen_from_file_int((file), (mode) STREAMS_REL_CC)
#ifndef PHP_WIN32
extern int php_get_uid_by_name(const char *name, uid_t *uid);
extern int php_get_gid_by_name(const char *name, gid_t *gid);
#endif
#if defined(PHP_WIN32)
# define PLAIN_WRAP_BUF_SIZE(st) (((st) > UINT_MAX) ? UINT_MAX : (unsigned int)(st))
#define fsync _commit
#define fdatasync fsync
#else
# define PLAIN_WRAP_BUF_SIZE(st) (st)
# if !defined(HAVE_FDATASYNC)
# define fdatasync fsync
# elif defined(__APPLE__)
// The symbol is present, however not in the headers
extern int fdatasync(int);
# endif
#endif
/* parse standard "fopen" modes into open() flags */
PHPAPI int php_stream_parse_fopen_modes(const char *mode, int *open_flags)
{
int flags;
switch (mode[0]) {
case 'r':
flags = 0;
break;
case 'w':
flags = O_TRUNC|O_CREAT;
break;
case 'a':
flags = O_CREAT|O_APPEND;
break;
case 'x':
flags = O_CREAT|O_EXCL;
break;
case 'c':
flags = O_CREAT;
break;
default:
/* unknown mode */
return FAILURE;
}
if (strchr(mode, '+')) {
flags |= O_RDWR;
} else if (flags) {
flags |= O_WRONLY;
} else {
flags |= O_RDONLY;
}
#if defined(O_CLOEXEC)
if (strchr(mode, 'e')) {
flags |= O_CLOEXEC;
}
#endif
#if defined(O_NONBLOCK)
if (strchr(mode, 'n')) {
flags |= O_NONBLOCK;
}
#endif
#if defined(_O_TEXT) && defined(O_BINARY)
if (strchr(mode, 't')) {
flags |= _O_TEXT;
} else {
flags |= O_BINARY;
}
#endif
*open_flags = flags;
return SUCCESS;
}
/* {{{ ------- STDIO stream implementation -------*/
typedef struct {
FILE *file;
int fd; /* underlying file descriptor */
unsigned is_process_pipe:1; /* use pclose instead of fclose */
unsigned is_pipe:1; /* stream is an actual pipe, currently Windows only*/
unsigned cached_fstat:1; /* sb is valid */
unsigned is_pipe_blocking:1; /* allow blocking read() on pipes, currently Windows only */
unsigned no_forced_fstat:1; /* Use fstat cache even if forced */
unsigned is_seekable:1; /* don't try and seek, if not set */
unsigned _reserved:26;
int lock_flag; /* stores the lock state */
zend_string *temp_name; /* if non-null, this is the path to a temporary file that
* is to be deleted when the stream is closed */
#ifdef HAVE_FLUSHIO
char last_op;
#endif
#ifdef HAVE_MMAP
char *last_mapped_addr;
size_t last_mapped_len;
#endif
#ifdef PHP_WIN32
char *last_mapped_addr;
HANDLE file_mapping;
#endif
zend_stat_t sb;
} php_stdio_stream_data;
#define PHP_STDIOP_GET_FD(anfd, data) anfd = (data)->file ? fileno((data)->file) : (data)->fd
static int do_fstat(php_stdio_stream_data *d, int force)
{
if (!d->cached_fstat || (force && !d->no_forced_fstat)) {
int fd;
int r;
PHP_STDIOP_GET_FD(fd, d);
r = zend_fstat(fd, &d->sb);
d->cached_fstat = r == 0;
return r;
}
return 0;
}
static php_stream *_php_stream_fopen_from_fd_int(int fd, const char *mode, const char *persistent_id STREAMS_DC)
{
php_stdio_stream_data *self;
self = pemalloc_rel_orig(sizeof(*self), persistent_id);
memset(self, 0, sizeof(*self));
self->file = NULL;
self->is_seekable = 1;
self->is_pipe = 0;
self->lock_flag = LOCK_UN;
self->is_process_pipe = 0;
self->temp_name = NULL;
self->fd = fd;
#ifdef PHP_WIN32
self->is_pipe_blocking = 0;
#endif
return php_stream_alloc_rel(&php_stream_stdio_ops, self, persistent_id, mode);
}
static php_stream *_php_stream_fopen_from_file_int(FILE *file, const char *mode STREAMS_DC)
{
php_stdio_stream_data *self;
self = emalloc_rel_orig(sizeof(*self));
memset(self, 0, sizeof(*self));
self->file = file;
self->is_seekable = 1;
self->is_pipe = 0;
self->lock_flag = LOCK_UN;
self->is_process_pipe = 0;
self->temp_name = NULL;
self->fd = fileno(file);
#ifdef PHP_WIN32
self->is_pipe_blocking = 0;
#endif
return php_stream_alloc_rel(&php_stream_stdio_ops, self, 0, mode);
}
PHPAPI php_stream *_php_stream_fopen_temporary_file(const char *dir, const char *pfx, zend_string **opened_path_ptr STREAMS_DC)
{
zend_string *opened_path = NULL;
int fd;
fd = php_open_temporary_fd(dir, pfx, &opened_path);
if (fd != -1) {
php_stream *stream;
if (opened_path_ptr) {
*opened_path_ptr = opened_path;
}
stream = php_stream_fopen_from_fd_int_rel(fd, "r+b", NULL);
if (stream) {
php_stdio_stream_data *self = (php_stdio_stream_data*)stream->abstract;
stream->wrapper = (php_stream_wrapper*)&php_plain_files_wrapper;
stream->orig_path = estrndup(ZSTR_VAL(opened_path), ZSTR_LEN(opened_path));
self->temp_name = opened_path;
self->lock_flag = LOCK_UN;
return stream;
}
close(fd);
php_error_docref(NULL, E_WARNING, "Unable to allocate stream");
return NULL;
}
return NULL;
}
PHPAPI php_stream *_php_stream_fopen_tmpfile(int dummy STREAMS_DC)
{
return php_stream_fopen_temporary_file(NULL, "php", NULL);
}
static void detect_is_seekable(php_stdio_stream_data *self) {
#if defined(S_ISFIFO) && defined(S_ISCHR)
if (self->fd >= 0 && do_fstat(self, 0) == 0) {
self->is_seekable = !(S_ISFIFO(self->sb.st_mode) || S_ISCHR(self->sb.st_mode));
self->is_pipe = S_ISFIFO(self->sb.st_mode);
}
#elif defined(PHP_WIN32)
uintptr_t handle = _get_osfhandle(self->fd);
if (handle != (uintptr_t)INVALID_HANDLE_VALUE) {
DWORD file_type = GetFileType((HANDLE)handle);
self->is_seekable = !(file_type == FILE_TYPE_PIPE || file_type == FILE_TYPE_CHAR);
self->is_pipe = file_type == FILE_TYPE_PIPE;
/* Additional check needed to distinguish between pipes and sockets. */
if (self->is_pipe && !GetNamedPipeInfo((HANDLE) handle, NULL, NULL, NULL, NULL)) {
self->is_pipe = 0;
}
}
#endif
}
PHPAPI php_stream *_php_stream_fopen_from_fd(int fd, const char *mode, const char *persistent_id, bool zero_position STREAMS_DC)
{
php_stream *stream = php_stream_fopen_from_fd_int_rel(fd, mode, persistent_id);
if (stream) {
php_stdio_stream_data *self = (php_stdio_stream_data*)stream->abstract;
detect_is_seekable(self);
if (!self->is_seekable) {
stream->flags |= PHP_STREAM_FLAG_NO_SEEK;
stream->position = -1;
} else if (zero_position) {
ZEND_ASSERT(zend_lseek(self->fd, 0, SEEK_CUR) == 0);
stream->position = 0;
} else {
stream->position = zend_lseek(self->fd, 0, SEEK_CUR);
#ifdef ESPIPE
/* FIXME: Is this code still needed? */
if (stream->position == (zend_off_t)-1 && errno == ESPIPE) {
stream->flags |= PHP_STREAM_FLAG_NO_SEEK;
self->is_seekable = 0;
}
#endif
}
}
return stream;
}
PHPAPI php_stream *_php_stream_fopen_from_file(FILE *file, const char *mode STREAMS_DC)
{
php_stream *stream = php_stream_fopen_from_file_int_rel(file, mode);
if (stream) {
php_stdio_stream_data *self = (php_stdio_stream_data*)stream->abstract;
detect_is_seekable(self);
if (!self->is_seekable) {
stream->flags |= PHP_STREAM_FLAG_NO_SEEK;
stream->position = -1;
} else {
stream->position = zend_ftell(file);
}
}
return stream;
}
PHPAPI php_stream *_php_stream_fopen_from_pipe(FILE *file, const char *mode STREAMS_DC)
{
php_stdio_stream_data *self;
php_stream *stream;
self = emalloc_rel_orig(sizeof(*self));
memset(self, 0, sizeof(*self));
self->file = file;
self->is_seekable = 0;
self->is_pipe = 1;
self->lock_flag = LOCK_UN;
self->is_process_pipe = 1;
self->fd = fileno(file);
self->temp_name = NULL;
#ifdef PHP_WIN32
self->is_pipe_blocking = 0;
#endif
stream = php_stream_alloc_rel(&php_stream_stdio_ops, self, 0, mode);
stream->flags |= PHP_STREAM_FLAG_NO_SEEK;
return stream;
}
static ssize_t php_stdiop_write(php_stream *stream, const char *buf, size_t count)
{
php_stdio_stream_data *data = (php_stdio_stream_data*)stream->abstract;
assert(data != NULL);
if (data->fd >= 0) {
#ifdef PHP_WIN32
ssize_t bytes_written = _write(data->fd, buf, (unsigned int)(count > INT_MAX ? INT_MAX : count));
#else
ssize_t bytes_written = write(data->fd, buf, count);
#endif
if (bytes_written < 0) {
if (PHP_IS_TRANSIENT_ERROR(errno)) {
return 0;
}
if (errno == EINTR) {
/* TODO: Should this be treated as a proper error or not? */
return bytes_written;
}
if (!(stream->flags & PHP_STREAM_FLAG_SUPPRESS_ERRORS)) {
php_error_docref(NULL, E_NOTICE, "Write of %zu bytes failed with errno=%d %s", count, errno, strerror(errno));
}
}
return bytes_written;
} else {
#ifdef HAVE_FLUSHIO
if (data->is_seekable && data->last_op == 'r') {
zend_fseek(data->file, 0, SEEK_CUR);
}
data->last_op = 'w';
#endif
return (ssize_t) fwrite(buf, 1, count, data->file);
}
}
static ssize_t php_stdiop_read(php_stream *stream, char *buf, size_t count)
{
php_stdio_stream_data *data = (php_stdio_stream_data*)stream->abstract;
ssize_t ret;
assert(data != NULL);
if (data->fd >= 0) {
#ifdef PHP_WIN32
php_stdio_stream_data *self = (php_stdio_stream_data*)stream->abstract;
if ((self->is_pipe || self->is_process_pipe) && !self->is_pipe_blocking) {
HANDLE ph = (HANDLE)_get_osfhandle(data->fd);
int retry = 0;
DWORD avail_read = 0;
do {
/* Look ahead to get the available data amount to read. Do the same
as read() does, however not blocking forever. In case it failed,
no data will be read (better than block). */
if (!PeekNamedPipe(ph, NULL, 0, NULL, &avail_read, NULL)) {
break;
}
/* If there's nothing to read, wait in 10us periods. */
if (0 == avail_read) {
usleep(10);
}
} while (0 == avail_read && retry++ < 3200000);
/* Reduce the required data amount to what is available, otherwise read()
will block.*/
if (avail_read < count) {
count = avail_read;
}
}
#endif
ret = read(data->fd, buf, PLAIN_WRAP_BUF_SIZE(count));
if (ret == (size_t)-1 && errno == EINTR) {
/* Read was interrupted, retry once,
If read still fails, give up with feof==0
so script can retry if desired */
ret = read(data->fd, buf, PLAIN_WRAP_BUF_SIZE(count));
}
if (ret < 0) {
if (PHP_IS_TRANSIENT_ERROR(errno)) {
/* Not an error. */
ret = 0;
} else if (errno == EINTR) {
/* TODO: Should this be treated as a proper error or not? */
} else {
if (!(stream->flags & PHP_STREAM_FLAG_SUPPRESS_ERRORS)) {
php_error_docref(NULL, E_NOTICE, "Read of %zu bytes failed with errno=%d %s", count, errno, strerror(errno));
}
/* TODO: Remove this special-case? */
if (errno != EBADF) {
stream->eof = 1;
}
}
} else if (ret == 0) {
stream->eof = 1;
}
} else {
#ifdef HAVE_FLUSHIO
if (data->is_seekable && data->last_op == 'w')
zend_fseek(data->file, 0, SEEK_CUR);
data->last_op = 'r';
#endif
ret = fread(buf, 1, count, data->file);
stream->eof = feof(data->file);
}
return ret;
}
static int php_stdiop_close(php_stream *stream, int close_handle)
{
int ret;
php_stdio_stream_data *data = (php_stdio_stream_data*)stream->abstract;
assert(data != NULL);
#ifdef HAVE_MMAP
if (data->last_mapped_addr) {
munmap(data->last_mapped_addr, data->last_mapped_len);
data->last_mapped_addr = NULL;
}
#elif defined(PHP_WIN32)
if (data->last_mapped_addr) {
UnmapViewOfFile(data->last_mapped_addr);
data->last_mapped_addr = NULL;
}
if (data->file_mapping) {
CloseHandle(data->file_mapping);
data->file_mapping = NULL;
}
#endif
if (close_handle) {
if (data->file) {
if (data->is_process_pipe) {
errno = 0;
ret = pclose(data->file);
#ifdef HAVE_SYS_WAIT_H
if (WIFEXITED(ret)) {
ret = WEXITSTATUS(ret);
}
#endif
} else {
ret = fclose(data->file);
data->file = NULL;
}
} else if (data->fd != -1) {
ret = close(data->fd);
data->fd = -1;
} else {
return 0; /* everything should be closed already -> success */
}
if (data->temp_name) {
#ifdef PHP_WIN32
php_win32_ioutil_unlink(ZSTR_VAL(data->temp_name));
#else
unlink(ZSTR_VAL(data->temp_name));
#endif
/* temporary streams are never persistent */
zend_string_release_ex(data->temp_name, 0);
data->temp_name = NULL;
}
} else {
ret = 0;
data->file = NULL;
data->fd = -1;
}
pefree(data, stream->is_persistent);
return ret;
}
static int php_stdiop_flush(php_stream *stream)
{
php_stdio_stream_data *data = (php_stdio_stream_data*)stream->abstract;
assert(data != NULL);
/*
* stdio buffers data in user land. By calling fflush(3), this
* data is sent to the kernel using write(2). fsync'ing is
* something completely different.
*/
if (data->file) {
return fflush(data->file);
}
return 0;
}
static int php_stdiop_sync(php_stream *stream, bool dataonly)
{
php_stdio_stream_data *data = (php_stdio_stream_data*)stream->abstract;
FILE *fp;
int fd;
if (php_stream_cast(stream, PHP_STREAM_AS_STDIO, (void**)&fp, REPORT_ERRORS) == FAILURE) {
return -1;
}
if (php_stdiop_flush(stream) == 0) {
PHP_STDIOP_GET_FD(fd, data);
if (dataonly) {
return fdatasync(fd);
} else {
return fsync(fd);
}
}
return -1;
}
static int php_stdiop_seek(php_stream *stream, zend_off_t offset, int whence, zend_off_t *newoffset)
{
php_stdio_stream_data *data = (php_stdio_stream_data*)stream->abstract;
int ret;
assert(data != NULL);
if (!data->is_seekable) {
php_error_docref(NULL, E_WARNING, "Cannot seek on this stream");
return -1;
}
if (data->fd >= 0) {
zend_off_t result;
result = zend_lseek(data->fd, offset, whence);
if (result == (zend_off_t)-1)
return -1;
*newoffset = result;
return 0;
} else {
ret = zend_fseek(data->file, offset, whence);
*newoffset = zend_ftell(data->file);
return ret;
}
}
static int php_stdiop_cast(php_stream *stream, int castas, void **ret)
{
php_socket_t fd;
php_stdio_stream_data *data = (php_stdio_stream_data*) stream->abstract;
assert(data != NULL);
/* as soon as someone touches the stdio layer, buffering may ensue,
* so we need to stop using the fd directly in that case */
switch (castas) {
case PHP_STREAM_AS_STDIO:
if (ret) {
if (data->file == NULL) {
/* we were opened as a plain file descriptor, so we
* need fdopen now */
char fixed_mode[5];
php_stream_mode_sanitize_fdopen_fopencookie(stream, fixed_mode);
data->file = fdopen(data->fd, fixed_mode);
if (data->file == NULL) {
return FAILURE;
}
}
*(FILE**)ret = data->file;
data->fd = SOCK_ERR;
}
return SUCCESS;
case PHP_STREAM_AS_FD_FOR_SELECT:
PHP_STDIOP_GET_FD(fd, data);
if (SOCK_ERR == fd) {
return FAILURE;
}
if (ret) {
*(php_socket_t *)ret = fd;
}
return SUCCESS;
case PHP_STREAM_AS_FD:
PHP_STDIOP_GET_FD(fd, data);
if (SOCK_ERR == fd) {
return FAILURE;
}
if (data->file) {
fflush(data->file);
}
if (ret) {
*(php_socket_t *)ret = fd;
}
return SUCCESS;
default:
return FAILURE;
}
}
static int php_stdiop_stat(php_stream *stream, php_stream_statbuf *ssb)
{
int ret;
php_stdio_stream_data *data = (php_stdio_stream_data*) stream->abstract;
assert(data != NULL);
if((ret = do_fstat(data, 1)) == 0) {
memcpy(&ssb->sb, &data->sb, sizeof(ssb->sb));
}
return ret;
}
static int php_stdiop_set_option(php_stream *stream, int option, int value, void *ptrparam)
{
php_stdio_stream_data *data = (php_stdio_stream_data*) stream->abstract;
size_t size;
int fd;
#ifdef O_NONBLOCK
/* FIXME: make this work for win32 */
int flags;
int oldval;
#endif
PHP_STDIOP_GET_FD(fd, data);
switch(option) {
case PHP_STREAM_OPTION_BLOCKING:
if (fd == -1)
return -1;
#ifdef O_NONBLOCK
flags = fcntl(fd, F_GETFL, 0);
oldval = (flags & O_NONBLOCK) ? 0 : 1;
if (value)
flags &= ~O_NONBLOCK;
else
flags |= O_NONBLOCK;
if (-1 == fcntl(fd, F_SETFL, flags))
return -1;
return oldval;
#else
return -1; /* not yet implemented */
#endif
case PHP_STREAM_OPTION_WRITE_BUFFER:
if (data->file == NULL) {
return -1;
}
if (ptrparam)
size = *(size_t *)ptrparam;
else
size = BUFSIZ;
switch(value) {
case PHP_STREAM_BUFFER_NONE:
return setvbuf(data->file, NULL, _IONBF, 0);
case PHP_STREAM_BUFFER_LINE:
return setvbuf(data->file, NULL, _IOLBF, size);
case PHP_STREAM_BUFFER_FULL:
return setvbuf(data->file, NULL, _IOFBF, size);
default:
return -1;
}
break;
case PHP_STREAM_OPTION_LOCKING:
if (fd == -1) {
return -1;
}
if ((uintptr_t) ptrparam == PHP_STREAM_LOCK_SUPPORTED) {
return 0;
}
if (!flock(fd, value)) {
data->lock_flag = value;
return 0;
} else {
return -1;
}
break;
case PHP_STREAM_OPTION_MMAP_API:
#ifdef HAVE_MMAP
{
php_stream_mmap_range *range = (php_stream_mmap_range*)ptrparam;
int prot, flags;
switch (value) {
case PHP_STREAM_MMAP_SUPPORTED:
return fd == -1 ? PHP_STREAM_OPTION_RETURN_ERR : PHP_STREAM_OPTION_RETURN_OK;
case PHP_STREAM_MMAP_MAP_RANGE:
if (do_fstat(data, 1) != 0) {
return PHP_STREAM_OPTION_RETURN_ERR;
}
if (range->offset > data->sb.st_size) {
range->offset = data->sb.st_size;
}
if (range->length == 0 ||
range->length > data->sb.st_size - range->offset) {
range->length = data->sb.st_size - range->offset;
}
switch (range->mode) {
case PHP_STREAM_MAP_MODE_READONLY:
prot = PROT_READ;
flags = MAP_PRIVATE;
break;
case PHP_STREAM_MAP_MODE_READWRITE:
prot = PROT_READ | PROT_WRITE;
flags = MAP_PRIVATE;
break;
case PHP_STREAM_MAP_MODE_SHARED_READONLY:
prot = PROT_READ;
flags = MAP_SHARED;
break;
case PHP_STREAM_MAP_MODE_SHARED_READWRITE:
prot = PROT_READ | PROT_WRITE;
flags = MAP_SHARED;
break;
default:
return PHP_STREAM_OPTION_RETURN_ERR;
}
range->mapped = (char*)mmap(NULL, range->length, prot, flags, fd, range->offset);
if (range->mapped == (char*)MAP_FAILED) {
range->mapped = NULL;
return PHP_STREAM_OPTION_RETURN_ERR;
}
/* remember the mapping */
data->last_mapped_addr = range->mapped;
data->last_mapped_len = range->length;
return PHP_STREAM_OPTION_RETURN_OK;
case PHP_STREAM_MMAP_UNMAP:
if (data->last_mapped_addr) {
munmap(data->last_mapped_addr, data->last_mapped_len);
data->last_mapped_addr = NULL;
return PHP_STREAM_OPTION_RETURN_OK;
}
return PHP_STREAM_OPTION_RETURN_ERR;
}
}
#elif defined(PHP_WIN32)
{
php_stream_mmap_range *range = (php_stream_mmap_range*)ptrparam;
HANDLE hfile = (HANDLE)_get_osfhandle(fd);
DWORD prot, acc, loffs = 0, hoffs = 0, delta = 0;
LARGE_INTEGER file_size;
switch (value) {
case PHP_STREAM_MMAP_SUPPORTED:
return hfile == INVALID_HANDLE_VALUE ? PHP_STREAM_OPTION_RETURN_ERR : PHP_STREAM_OPTION_RETURN_OK;
case PHP_STREAM_MMAP_MAP_RANGE:
switch (range->mode) {
case PHP_STREAM_MAP_MODE_READONLY:
prot = PAGE_READONLY;
acc = FILE_MAP_READ;
break;
case PHP_STREAM_MAP_MODE_READWRITE:
prot = PAGE_READWRITE;
acc = FILE_MAP_READ | FILE_MAP_WRITE;
break;
case PHP_STREAM_MAP_MODE_SHARED_READONLY:
prot = PAGE_READONLY;
acc = FILE_MAP_READ;
/* TODO: we should assign a name for the mapping */
break;
case PHP_STREAM_MAP_MODE_SHARED_READWRITE:
prot = PAGE_READWRITE;
acc = FILE_MAP_READ | FILE_MAP_WRITE;
/* TODO: we should assign a name for the mapping */
break;
default:
return PHP_STREAM_OPTION_RETURN_ERR;
}
/* create a mapping capable of viewing the whole file (this costs no real resources) */
data->file_mapping = CreateFileMapping(hfile, NULL, prot, 0, 0, NULL);
if (data->file_mapping == NULL) {
return PHP_STREAM_OPTION_RETURN_ERR;
}
if (!GetFileSizeEx(hfile, &file_size)) {
CloseHandle(data->file_mapping);
data->file_mapping = NULL;
return PHP_STREAM_OPTION_RETURN_ERR;
}
# if defined(_WIN64)
size = file_size.QuadPart;
# else
if (file_size.HighPart) {
CloseHandle(data->file_mapping);
data->file_mapping = NULL;
return PHP_STREAM_OPTION_RETURN_ERR;
} else {
size = file_size.LowPart;
}
# endif
if (range->offset > size) {
range->offset = size;
}
if (range->length == 0 || range->length > size - range->offset) {
range->length = size - range->offset;
}
/* figure out how big a chunk to map to be able to view the part that we need */
if (range->offset != 0) {
SYSTEM_INFO info;
DWORD gran;
GetSystemInfo(&info);
gran = info.dwAllocationGranularity;
ZEND_ASSERT(gran != 0 && (gran & (gran - 1)) == 0);
size_t rounded_offset = (range->offset / gran) * gran;
delta = range->offset - rounded_offset;
loffs = (DWORD)rounded_offset;
#ifdef _WIN64
hoffs = (DWORD)(rounded_offset >> 32);
#else
hoffs = 0;
#endif
}
/* MapViewOfFile()ing zero bytes would map to the end of the file; match *nix behavior instead */
if (range->length + delta == 0) {
return PHP_STREAM_OPTION_RETURN_ERR;
}
data->last_mapped_addr = MapViewOfFile(data->file_mapping, acc, hoffs, loffs, range->length + delta);
if (data->last_mapped_addr) {
/* give them back the address of the start offset they requested */
range->mapped = data->last_mapped_addr + delta;
return PHP_STREAM_OPTION_RETURN_OK;
}
CloseHandle(data->file_mapping);
data->file_mapping = NULL;
return PHP_STREAM_OPTION_RETURN_ERR;
case PHP_STREAM_MMAP_UNMAP:
if (data->last_mapped_addr) {
UnmapViewOfFile(data->last_mapped_addr);
data->last_mapped_addr = NULL;
CloseHandle(data->file_mapping);
data->file_mapping = NULL;
return PHP_STREAM_OPTION_RETURN_OK;
}
return PHP_STREAM_OPTION_RETURN_ERR;
default:
return PHP_STREAM_OPTION_RETURN_ERR;
}
}
#endif
return PHP_STREAM_OPTION_RETURN_NOTIMPL;
case PHP_STREAM_OPTION_SYNC_API:
switch (value) {
case PHP_STREAM_SYNC_SUPPORTED:
return fd == -1 ? PHP_STREAM_OPTION_RETURN_ERR : PHP_STREAM_OPTION_RETURN_OK;
case PHP_STREAM_SYNC_FSYNC:
return php_stdiop_sync(stream, 0) == 0 ? PHP_STREAM_OPTION_RETURN_OK : PHP_STREAM_OPTION_RETURN_ERR;
case PHP_STREAM_SYNC_FDSYNC:
return php_stdiop_sync(stream, 1) == 0 ? PHP_STREAM_OPTION_RETURN_OK : PHP_STREAM_OPTION_RETURN_ERR;
}
/* Invalid option passed */
return PHP_STREAM_OPTION_RETURN_ERR;
case PHP_STREAM_OPTION_TRUNCATE_API:
switch (value) {
case PHP_STREAM_TRUNCATE_SUPPORTED:
return fd == -1 ? PHP_STREAM_OPTION_RETURN_ERR : PHP_STREAM_OPTION_RETURN_OK;
case PHP_STREAM_TRUNCATE_SET_SIZE: {
ptrdiff_t new_size = *(ptrdiff_t*)ptrparam;
if (new_size < 0) {
return PHP_STREAM_OPTION_RETURN_ERR;
}
#ifdef PHP_WIN32
HANDLE h = (HANDLE) _get_osfhandle(fd);
if (INVALID_HANDLE_VALUE == h) {
return PHP_STREAM_OPTION_RETURN_ERR;
}
LARGE_INTEGER sz, old_sz;
sz.QuadPart = 0;
if (!SetFilePointerEx(h, sz, &old_sz, FILE_CURRENT)) {
return PHP_STREAM_OPTION_RETURN_ERR;
}
#ifdef _WIN64
sz.QuadPart = new_size;
#else
sz.HighPart = 0;
sz.LowPart = new_size;
#endif
if (!SetFilePointerEx(h, sz, NULL, FILE_BEGIN)) {
return PHP_STREAM_OPTION_RETURN_ERR;
}
if (0 == SetEndOfFile(h)) {
return PHP_STREAM_OPTION_RETURN_ERR;
}
if (!SetFilePointerEx(h, old_sz, NULL, FILE_BEGIN)) {
return PHP_STREAM_OPTION_RETURN_ERR;
}
return PHP_STREAM_OPTION_RETURN_OK;
#else
return ftruncate(fd, new_size) == 0 ? PHP_STREAM_OPTION_RETURN_OK : PHP_STREAM_OPTION_RETURN_ERR;
#endif
}
}
return PHP_STREAM_OPTION_RETURN_NOTIMPL;
#ifdef PHP_WIN32
case PHP_STREAM_OPTION_PIPE_BLOCKING:
data->is_pipe_blocking = value;
return PHP_STREAM_OPTION_RETURN_OK;
#endif
case PHP_STREAM_OPTION_META_DATA_API:
if (fd == -1)
return -1;
#ifdef O_NONBLOCK
flags = fcntl(fd, F_GETFL, 0);
add_assoc_bool((zval*)ptrparam, "timed_out", 0);
add_assoc_bool((zval*)ptrparam, "blocked", (flags & O_NONBLOCK)? 0 : 1);
add_assoc_bool((zval*)ptrparam, "eof", stream->eof);
return PHP_STREAM_OPTION_RETURN_OK;
#endif
return -1;