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php-src/main/streams/plain_wrapper.c

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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2004 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.0 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: |
| http://www.php.net/license/3_0.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 |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Wez Furlong <wez@thebrainroom.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#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 <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"
/* 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;
default:
/* unknown mode */
return FAILURE;
}
if (strchr(mode, '+')) {
flags |= O_RDWR;
} else if (flags) {
flags |= O_WRONLY;
} else {
flags |= O_RDONLY;
}
#if defined(_O_TEXT) && defined(O_BINARY)
if (strchr(mode, 't')) {
flags |= _O_TEXT;
} else {
flags |= O_BINARY;
}
#endif
*open_flags = flags;
return SUCCESS;
}
/* {{{ php_stream_fopen */
PHPAPI php_stream *_php_stream_fopen(const char *filename, const char *mode, char **opened_path, int options STREAMS_DC TSRMLS_DC)
{
char *realpath = NULL;
struct stat st;
int open_flags;
int fd;
php_stream *ret;
int persistent = options & STREAM_OPEN_PERSISTENT;
char *persistent_id = NULL;
if (FAILURE == php_stream_parse_fopen_modes(mode, &open_flags)) {
if (options & REPORT_ERRORS) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "`%s' is not a valid mode for fopen", mode);
}
return NULL;
}
if ((realpath = expand_filepath(filename, NULL TSRMLS_CC)) == NULL) {
return NULL;
}
if (persistent) {
spprintf(&persistent_id, 0, "streams_stdio_%d_%s", open_flags, realpath);
switch (php_stream_from_persistent_id(persistent_id, &ret TSRMLS_CC)) {
case PHP_STREAM_PERSISTENT_SUCCESS:
if (opened_path) {
*opened_path = realpath;
realpath = NULL;
}
if (realpath) {
efree(realpath);
}
/* fall through */
case PHP_STREAM_PERSISTENT_FAILURE:
efree(persistent_id);;
return ret;
}
}
fd = open(realpath, open_flags, 0666);
if (fd != -1) {
/* sanity checks for include/require */
if (options & STREAM_OPEN_FOR_INCLUDE && (fstat(fd, &st) == -1 || !S_ISREG(st.st_mode))) {
#ifdef PHP_WIN32
/* skip the sanity check; fstat doesn't appear to work on
* UNC paths */
if (!IS_UNC_PATH(filename, strlen(filename)))
#endif
goto err;
}
ret = php_stream_fopen_from_fd_rel(fd, mode, persistent_id);
if (ret) {
if (opened_path) {
*opened_path = realpath;
realpath = NULL;
}
if (realpath) {
efree(realpath);
}
if (persistent_id) {
efree(persistent_id);
}
return ret;
}
err:
close(fd);
}
efree(realpath);
if (persistent_id) {
efree(persistent_id);
}
return NULL;
}
/* }}} */
/* {{{ ------- STDIO stream implementation -------*/
typedef struct {
FILE *file;
int fd; /* underlying file descriptor */
int is_process_pipe; /* use pclose instead of fclose */
int is_pipe; /* don't try and seek */
int lock_flag; /* stores the lock state */
char *temp_file_name; /* if non-null, this is the path to a temporary file that
* is to be deleted when the stream is closed */
#if HAVE_FLUSHIO
char last_op;
#endif
#if HAVE_MMAP
char *last_mapped_addr;
size_t last_mapped_len;
#endif
#ifdef PHP_WIN32
char *last_mapped_addr;
HANDLE file_mapping;
#endif
} php_stdio_stream_data;
PHPAPI php_stream *_php_stream_fopen_temporary_file(const char *dir, const char *pfx, char **opened_path STREAMS_DC TSRMLS_DC)
{
int fd = php_open_temporary_fd(dir, pfx, opened_path TSRMLS_CC);
if (fd != -1) {
php_stream *stream = php_stream_fopen_from_fd_rel(fd, "r+b", NULL);
if (stream) {
return stream;
}
close(fd);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "unable to allocate stream");
return NULL;
}
return NULL;
}
PHPAPI php_stream *_php_stream_fopen_tmpfile(int dummy STREAMS_DC TSRMLS_DC)
{
char *opened_path = NULL;
int fd = php_open_temporary_fd(NULL, "php", &opened_path TSRMLS_CC);
if (fd != -1) {
php_stream *stream = php_stream_fopen_from_fd_rel(fd, "r+b", NULL);
if (stream) {
php_stdio_stream_data *self = (php_stdio_stream_data*)stream->abstract;
self->temp_file_name = opened_path;
self->lock_flag = LOCK_UN;
return stream;
}
close(fd);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "unable to allocate stream");
return NULL;
}
return NULL;
}
PHPAPI php_stream *_php_stream_fopen_from_fd(int fd, const char *mode, const char *persistent_id STREAMS_DC TSRMLS_DC)
{
php_stdio_stream_data *self;
php_stream *stream;
self = pemalloc_rel_orig(sizeof(*self), persistent_id);
memset(self, 0, sizeof(*self));
self->file = NULL;
self->is_pipe = 0;
self->lock_flag = LOCK_UN;
self->is_process_pipe = 0;
self->temp_file_name = NULL;
self->fd = fd;
#ifdef S_ISFIFO
/* detect if this is a pipe */
if (self->fd >= 0) {
struct stat sb;
self->is_pipe = (fstat(self->fd, &sb) == 0 && S_ISFIFO(sb.st_mode)) ? 1 : 0;
}
#elif defined(PHP_WIN32)
{
long handle = _get_osfhandle(self->fd);
DWORD in_buf_size, out_buf_size;
if (handle != 0xFFFFFFFF) {
self->is_pipe = GetNamedPipeInfo((HANDLE)handle, NULL, &out_buf_size, &in_buf_size, NULL);
}
}
#endif
stream = php_stream_alloc_rel(&php_stream_stdio_ops, self, persistent_id, mode);
if (stream) {
if (self->is_pipe) {
stream->flags |= PHP_STREAM_FLAG_NO_SEEK;
} else {
stream->position = lseek(self->fd, 0, SEEK_CUR);
}
}
return stream;
}
PHPAPI php_stream *_php_stream_fopen_from_file(FILE *file, const char *mode STREAMS_DC TSRMLS_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_pipe = 0;
self->lock_flag = LOCK_UN;
self->is_process_pipe = 0;
self->temp_file_name = NULL;
self->fd = fileno(file);
#ifdef S_ISFIFO
/* detect if this is a pipe */
if (self->fd >= 0) {
struct stat sb;
self->is_pipe = (fstat(self->fd, &sb) == 0 && S_ISFIFO(sb.st_mode)) ? 1 : 0;
}
#elif defined(PHP_WIN32)
{
long handle = _get_osfhandle(self->fd);
DWORD in_buf_size, out_buf_size;
if (handle != 0xFFFFFFFF) {
self->is_pipe = GetNamedPipeInfo((HANDLE)handle, NULL, &out_buf_size, &in_buf_size, NULL);
}
}
#endif
stream = php_stream_alloc_rel(&php_stream_stdio_ops, self, 0, mode);
if (stream) {
if (self->is_pipe) {
stream->flags |= PHP_STREAM_FLAG_NO_SEEK;
} else {
stream->position = ftell(file);
}
}
return stream;
}
PHPAPI php_stream *_php_stream_fopen_from_pipe(FILE *file, const char *mode STREAMS_DC TSRMLS_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_pipe = 1;
self->lock_flag = LOCK_UN;
self->is_process_pipe = 1;
self->fd = fileno(file);
self->temp_file_name = NULL;
stream = php_stream_alloc_rel(&php_stream_stdio_ops, self, 0, mode);
stream->flags |= PHP_STREAM_FLAG_NO_SEEK;
return stream;
}
#define PHP_STDIOP_GET_FD(anfd, data) anfd = (data)->file ? fileno((data)->file) : (data)->fd
static size_t php_stdiop_write(php_stream *stream, const char *buf, size_t count TSRMLS_DC)
{
php_stdio_stream_data *data = (php_stdio_stream_data*)stream->abstract;
assert(data != NULL);
if (data->fd >= 0) {
int bytes_written = write(data->fd, buf, count);
if (bytes_written < 0) return 0;
return (size_t) bytes_written;
} else {
#if HAVE_FLUSHIO
if (!data->is_pipe && data->last_op == 'r') {
fseek(data->file, 0, SEEK_CUR);
}
data->last_op = 'w';
#endif
return fwrite(buf, 1, count, data->file);
}
}
static size_t php_stdiop_read(php_stream *stream, char *buf, size_t count TSRMLS_DC)
{
php_stdio_stream_data *data = (php_stdio_stream_data*)stream->abstract;
size_t ret;
assert(data != NULL);
if (data->fd >= 0) {
ret = read(data->fd, buf, count);
stream->eof = (ret == 0 || (ret == -1 && errno != EWOULDBLOCK));
} else {
#if HAVE_FLUSHIO
if (!data->is_pipe && data->last_op == 'w')
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 TSRMLS_DC)
{
int ret;
php_stdio_stream_data *data = (php_stdio_stream_data*)stream->abstract;
assert(data != NULL);
#if 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->lock_flag != LOCK_UN) {
php_stream_lock(stream, LOCK_UN);
}
if (data->file) {
if (data->is_process_pipe) {
errno = 0;
ret = pclose(data->file);
#if HAVE_SYS_WAIT_H
if (WIFEXITED(ret)) {
ret = WEXITSTATUS(ret);
}
#endif
} else {
ret = fclose(data->file);
data->file = NULL;
}
} else if (data->fd != -1) {
#ifdef PHP_DEBUG
if (data->fd == 2 && 0 == strcmp(sapi_module.name, "cli")) {
/* don't close stderr in CLI in DEBUG mode, as we want to see any leaks */
ret = 0;
} else {
ret = close(data->fd);
}
#else
ret = close(data->fd);
#endif
data->fd = -1;
} else {
return 0; /* everything should be closed already -> success */
}
if (data->temp_file_name) {
unlink(data->temp_file_name);
/* temporary streams are never persistent */
efree(data->temp_file_name);
data->temp_file_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 TSRMLS_DC)
{
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 send 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_seek(php_stream *stream, off_t offset, int whence, off_t *newoffset TSRMLS_DC)
{
php_stdio_stream_data *data = (php_stdio_stream_data*)stream->abstract;
int ret;
assert(data != NULL);
if (data->is_pipe) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "cannot seek on a pipe");
return -1;
}
if (data->fd >= 0) {
off_t result;
result = lseek(data->fd, offset, whence);
if (result == (off_t)-1)
return -1;
*newoffset = result;
return 0;
} else {
ret = fseek(data->file, offset, whence);
*newoffset = ftell(data->file);
return ret;
}
}
static int php_stdiop_cast(php_stream *stream, int castas, void **ret TSRMLS_DC)
{
int 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 */
data->file = fdopen(data->fd, stream->mode);
}
*(FILE**)ret = data->file;
data->fd = -1;
}
return SUCCESS;
case PHP_STREAM_AS_FD_FOR_SELECT:
PHP_STDIOP_GET_FD(fd, data);
if (fd < 0) {
return FAILURE;
}
if (ret) {
*(int*)ret = fd;
}
return SUCCESS;
case PHP_STREAM_AS_FD:
PHP_STDIOP_GET_FD(fd, data);
if (fd < 0) {
return FAILURE;
}
if (data->file) {
fflush(data->file);
}
if (ret) {
*(int*)ret = fd;
}
return SUCCESS;
default:
return FAILURE;
}
}
static int php_stdiop_stat(php_stream *stream, php_stream_statbuf *ssb TSRMLS_DC)
{
int fd;
php_stdio_stream_data *data = (php_stdio_stream_data*) stream->abstract;
assert(data != NULL);
PHP_STDIOP_GET_FD(fd, data);
return fstat(fd, &ssb->sb);
}
static int php_stdiop_set_option(php_stream *stream, int option, int value, void *ptrparam TSRMLS_DC)
{
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:
stream->flags |= PHP_STREAM_FLAG_NO_BUFFER;
return setvbuf(data->file, NULL, _IONBF, 0);
case PHP_STREAM_BUFFER_LINE:
stream->flags ^= PHP_STREAM_FLAG_NO_BUFFER;
return setvbuf(data->file, NULL, _IOLBF, size);
case PHP_STREAM_BUFFER_FULL:
stream->flags ^= PHP_STREAM_FLAG_NO_BUFFER;
return setvbuf(data->file, NULL, _IOFBF, size);
default:
return -1;
}
break;
case PHP_STREAM_OPTION_LOCKING:
if (fd == -1) {
return -1;
}
if ((long) ptrparam == PHP_STREAM_LOCK_SUPPORTED) {
return 0;
}
if (!flock(fd, value) || (errno == EWOULDBLOCK && value & LOCK_NB)) {
data->lock_flag = value;
return 0;
} else {
return -1;
}
break;
case PHP_STREAM_OPTION_MMAP_API:
#if HAVE_MMAP
{
php_stream_mmap_range *range = (php_stream_mmap_range*)ptrparam;
struct stat sbuf;
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:
fstat(fd, &sbuf);
if (range->length == 0 || range->length > sbuf.st_size) {
range->length = sbuf.st_size;
}
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, delta = 0;
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;
}
/* 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 (range->length == 0) {
range->length = GetFileSize(hfile, NULL) - 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;
loffs = (range->offset / gran) * gran;
delta = range->offset - loffs;
}
data->last_mapped_addr = MapViewOfFile(data->file_mapping, acc, 0, loffs, range->length);
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_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:
return ftruncate(fd, *(size_t*)ptrparam) == 0 ? PHP_STREAM_OPTION_RETURN_OK : PHP_STREAM_OPTION_RETURN_ERR;
}
default:
return PHP_STREAM_OPTION_RETURN_NOTIMPL;
}
}
PHPAPI php_stream_ops php_stream_stdio_ops = {
php_stdiop_write, php_stdiop_read,
php_stdiop_close, php_stdiop_flush,
"STDIO",
php_stdiop_seek,
php_stdiop_cast,
php_stdiop_stat,
php_stdiop_set_option
};
/* }}} */
/* {{{ plain files opendir/readdir implementation */
static size_t php_plain_files_dirstream_read(php_stream *stream, char *buf, size_t count TSRMLS_DC)
{
DIR *dir = (DIR*)stream->abstract;
/* avoid libc5 readdir problems */
char entry[sizeof(struct dirent)+MAXPATHLEN];
struct dirent *result = (struct dirent *)&entry;
php_stream_dirent *ent = (php_stream_dirent*)buf;
/* avoid problems if someone mis-uses the stream */
if (count != sizeof(php_stream_dirent))
return 0;
if (php_readdir_r(dir, (struct dirent *)entry, &result) == 0 && result) {
PHP_STRLCPY(ent->d_name, result->d_name, sizeof(ent->d_name), strlen(result->d_name));
return sizeof(php_stream_dirent);
}
return 0;
}
static int php_plain_files_dirstream_close(php_stream *stream, int close_handle TSRMLS_DC)
{
return closedir((DIR *)stream->abstract);
}
static int php_plain_files_dirstream_rewind(php_stream *stream, off_t offset, int whence, off_t *newoffs TSRMLS_DC)
{
rewinddir((DIR *)stream->abstract);
return 0;
}
static php_stream_ops php_plain_files_dirstream_ops = {
NULL, php_plain_files_dirstream_read,
php_plain_files_dirstream_close, NULL,
"dir",
php_plain_files_dirstream_rewind,
NULL, /* cast */
NULL, /* stat */
NULL /* set_option */
};
static php_stream *php_plain_files_dir_opener(php_stream_wrapper *wrapper, char *path, char *mode,
int options, char **opened_path, php_stream_context *context STREAMS_DC TSRMLS_DC)
{
DIR *dir = NULL;
php_stream *stream = NULL;
if (((options & STREAM_DISABLE_OPEN_BASEDIR) == 0) && php_check_open_basedir(path TSRMLS_CC)) {
return NULL;
}
if (PG(safe_mode) &&(!php_checkuid(path, NULL, CHECKUID_CHECK_FILE_AND_DIR))) {
return NULL;
}
dir = VCWD_OPENDIR(path);
#ifdef PHP_WIN32
if (dir && dir->finished) {
closedir(dir);
dir = NULL;
}
#endif
if (dir) {
stream = php_stream_alloc(&php_plain_files_dirstream_ops, dir, 0, mode);
if (stream == NULL)
closedir(dir);
}
return stream;
}
/* }}} */
static php_stream *php_plain_files_stream_opener(php_stream_wrapper *wrapper, char *path, char *mode,
int options, char **opened_path, php_stream_context *context STREAMS_DC TSRMLS_DC)
{
if ((options & USE_PATH) && PG(include_path) != NULL) {
return php_stream_fopen_with_path_rel(path, mode, PG(include_path), opened_path, options);
}
if (((options & STREAM_DISABLE_OPEN_BASEDIR) == 0) && php_check_open_basedir(path TSRMLS_CC)) {
return NULL;
}
if ((options & ENFORCE_SAFE_MODE) && PG(safe_mode) && (!php_checkuid(path, mode, CHECKUID_CHECK_MODE_PARAM)))
return NULL;
return php_stream_fopen_rel(path, mode, opened_path, options);
}
static int php_plain_files_url_stater(php_stream_wrapper *wrapper, char *url, int flags, php_stream_statbuf *ssb, php_stream_context *context TSRMLS_DC)
{
if (strncmp(url, "file://", sizeof("file://") - 1) == 0) {
url += sizeof("file://") - 1;
}
if (PG(safe_mode) &&(!php_checkuid_ex(url, NULL, CHECKUID_CHECK_FILE_AND_DIR, (flags & PHP_STREAM_URL_STAT_QUIET) ? CHECKUID_NO_ERRORS : 0))) {
return -1;
}
if (php_check_open_basedir_ex(url, (flags & PHP_STREAM_URL_STAT_QUIET) ? 0 : 1 TSRMLS_CC)) {
return -1;
}
#ifdef HAVE_SYMLINK
if (flags & PHP_STREAM_URL_STAT_LINK) {
return VCWD_LSTAT(url, &ssb->sb);
} else
#endif
return VCWD_STAT(url, &ssb->sb);
}
static int php_plain_files_unlink(php_stream_wrapper *wrapper, char *url, int options, php_stream_context *context TSRMLS_DC)
{
char *p;
int ret;
zval funcname;
zval *retval = NULL;
if ((p = strstr(url, "://")) != NULL) {
url = p + 3;
}
if (options & ENFORCE_SAFE_MODE) {
if (PG(safe_mode) && !php_checkuid(url, NULL, CHECKUID_CHECK_FILE_AND_DIR)) {
return 0;
}
if (php_check_open_basedir(url TSRMLS_CC)) {
return 0;
}
}
ret = VCWD_UNLINK(url);
if (ret == -1) {
if (options & REPORT_ERRORS) {
php_error_docref1(NULL TSRMLS_CC, url, E_WARNING, "%s", strerror(errno));
}
return 0;
}
/* Clear stat cache */
ZVAL_STRINGL(&funcname, "clearstatcache", sizeof("clearstatcache")-1, 0);
call_user_function_ex(CG(function_table), NULL, &funcname, &retval, 0, NULL, 0, NULL TSRMLS_CC);
if (retval) {
zval_ptr_dtor(&retval);
}
return 1;
}
static int php_plain_files_rename(php_stream_wrapper *wrapper, char *url_from, char *url_to, int options, php_stream_context *context TSRMLS_DC)
{
char *p;
int ret;
if (!url_from || !url_to) {
return 0;
}
if ((p = strstr(url_from, "://")) != NULL) {
url_from = p + 3;
}
if ((p = strstr(url_to, "://")) != NULL) {
url_to = p + 3;
}
if (PG(safe_mode) && (!php_checkuid(url_from, NULL, CHECKUID_CHECK_FILE_AND_DIR) ||
!php_checkuid(url_to, NULL, CHECKUID_CHECK_FILE_AND_DIR))) {
return 0;
}
if (php_check_open_basedir(url_from TSRMLS_CC) || php_check_open_basedir(url_to TSRMLS_CC)) {
return 0;
}
ret = VCWD_RENAME(url_from, url_to);
if (ret == -1) {
#ifdef EXDEV
if (errno == EXDEV) {
if (php_copy_file(url_from, url_to TSRMLS_CC) == SUCCESS) {
VCWD_UNLINK(url_from);
return 1;
}
}
#endif
php_error_docref2(NULL TSRMLS_CC, url_from, url_to, E_WARNING, "%s", strerror(errno));
return 0;
}
return 1;
}
static int php_plain_files_mkdir(php_stream_wrapper *wrapper, char *dir, int mode, int options, php_stream_context *context TSRMLS_DC)
{
int ret, recursive = options & PHP_STREAM_MKDIR_RECURSIVE;
char *p;
if ((p = strstr(dir, "://")) != NULL) {
dir = p + 3;
}
if (!recursive) {
ret = php_mkdir(dir, mode TSRMLS_CC);
} else {
/* we look for directory separator from the end of string, thus hopefuly reducing our work load */
char *e, *buf;
struct stat sb;
int dir_len = strlen(dir);
buf = estrndup(dir, dir_len);
e = buf + dir_len;
/* find a top level directory we need to create */
while ((p = strrchr(buf, DEFAULT_SLASH))) {
*p = '\0';
if (VCWD_STAT(buf, &sb) == 0) {
*p = DEFAULT_SLASH;
break;
}
}
if (p == buf) {
ret = php_mkdir(dir, mode TSRMLS_CC);
} else if (!(ret = php_mkdir(buf, mode TSRMLS_CC))) {
if (!p) {
p = buf;
}
/* create any needed directories if the creation of the 1st directory worked */
while (++p != e) {
if (*p == '\0' && *(p + 1) != '\0') {
*p = DEFAULT_SLASH;
if ((ret = VCWD_MKDIR(buf, (mode_t)mode)) < 0) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s", strerror(errno));
break;
}
}
}
}
efree(buf);
}
if (ret < 0) {
/* Failure */
return 0;
} else {
/* Success */
return 1;
}
}
static int php_plain_files_rmdir(php_stream_wrapper *wrapper, char *url, int options, php_stream_context *context TSRMLS_DC)
{
if (PG(safe_mode) &&(!php_checkuid(url, NULL, CHECKUID_CHECK_FILE_AND_DIR))) {
return 0;
}
if (php_check_open_basedir(url TSRMLS_CC)) {
return 0;
}
if (VCWD_RMDIR(url) < 0) {
php_error_docref1(NULL TSRMLS_CC, url, E_WARNING, "%s", strerror(errno));
return 0;
}
return 1;
}
static php_stream_wrapper_ops php_plain_files_wrapper_ops = {
php_plain_files_stream_opener,
NULL,
NULL,
php_plain_files_url_stater,
php_plain_files_dir_opener,
"plainfile",
php_plain_files_unlink,
php_plain_files_rename,
php_plain_files_mkdir,
php_plain_files_rmdir
};
php_stream_wrapper php_plain_files_wrapper = {
&php_plain_files_wrapper_ops,
NULL,
0
};
/* {{{ php_stream_fopen_with_path */
PHPAPI php_stream *_php_stream_fopen_with_path(char *filename, char *mode, char *path, char **opened_path, int options STREAMS_DC TSRMLS_DC)
{
/* code ripped off from fopen_wrappers.c */
char *pathbuf, *ptr, *end;
char *exec_fname;
char trypath[MAXPATHLEN];
struct stat sb;
php_stream *stream;
int path_length;
int filename_length;
int exec_fname_length;
if (opened_path) {
*opened_path = NULL;
}
if(!filename) {
return NULL;
}
filename_length = strlen(filename);
/* Relative path open */
if (*filename == '.' && (IS_SLASH(filename[1]) || filename[1] == '.')) {
/* further checks, we could have ....... filenames */
ptr = filename + 1;
if (*ptr == '.') {
while (*(++ptr) == '.');
if (!IS_SLASH(*ptr)) { /* not a relative path after all */
goto not_relative_path;
}
}
if (((options & STREAM_DISABLE_OPEN_BASEDIR) == 0) && php_check_open_basedir(filename TSRMLS_CC)) {
return NULL;
}
if (PG(safe_mode) && (!php_checkuid(filename, mode, CHECKUID_CHECK_MODE_PARAM))) {
return NULL;
}
return php_stream_fopen_rel(filename, mode, opened_path, options);
}
/*
* files in safe_mode_include_dir (or subdir) are excluded from
* safe mode GID/UID checks
*/
not_relative_path:
/* Absolute path open */
if (IS_ABSOLUTE_PATH(filename, filename_length)) {
if (((options & STREAM_DISABLE_OPEN_BASEDIR) == 0) && php_check_open_basedir(filename TSRMLS_CC)) {
return NULL;
}
if ((php_check_safe_mode_include_dir(filename TSRMLS_CC)) == 0)
/* filename is in safe_mode_include_dir (or subdir) */
return php_stream_fopen_rel(filename, mode, opened_path, options);
if (PG(safe_mode) && (!php_checkuid(filename, mode, CHECKUID_CHECK_MODE_PARAM)))
return NULL;
return php_stream_fopen_rel(filename, mode, opened_path, options);
}
#ifdef PHP_WIN32
if (IS_SLASH(filename[0])) {
int cwd_len;
char *cwd;
cwd = virtual_getcwd_ex(&cwd_len TSRMLS_CC);
/* getcwd() will return always return [DRIVE_LETTER]:/) on windows. */
*(cwd+3) = '\0';
snprintf(trypath, MAXPATHLEN, "%s%s", cwd, filename);
free(cwd);
if (((options & STREAM_DISABLE_OPEN_BASEDIR) == 0) && php_check_open_basedir(trypath TSRMLS_CC)) {
return NULL;
}
if ((php_check_safe_mode_include_dir(trypath TSRMLS_CC)) == 0) {
return php_stream_fopen_rel(trypath, mode, opened_path, options);
}
if (PG(safe_mode) && (!php_checkuid(trypath, mode, CHECKUID_CHECK_MODE_PARAM))) {
return NULL;
}
return php_stream_fopen_rel(trypath, mode, opened_path, options);
}
#endif
if (!path || (path && !*path)) {
if (((options & STREAM_DISABLE_OPEN_BASEDIR) == 0) && php_check_open_basedir(path TSRMLS_CC)) {
return NULL;
}
if (PG(safe_mode) && (!php_checkuid(filename, mode, CHECKUID_CHECK_MODE_PARAM))) {
return NULL;
}
return php_stream_fopen_rel(filename, mode, opened_path, options);
}
/* check in provided path */
/* append the calling scripts' current working directory
* as a fall back case
*/
if (zend_is_executing(TSRMLS_C)) {
exec_fname = zend_get_executed_filename(TSRMLS_C);
exec_fname_length = strlen(exec_fname);
path_length = strlen(path);
while ((--exec_fname_length >= 0) && !IS_SLASH(exec_fname[exec_fname_length]));
if ((exec_fname && exec_fname[0] == '[')
|| exec_fname_length<=0) {
/* [no active file] or no path */
pathbuf = estrdup(path);
} else {
pathbuf = (char *) emalloc(exec_fname_length + path_length +1 +1);
memcpy(pathbuf, path, path_length);
pathbuf[path_length] = DEFAULT_DIR_SEPARATOR;
memcpy(pathbuf+path_length+1, exec_fname, exec_fname_length);
pathbuf[path_length + exec_fname_length +1] = '\0';
}
} else {
pathbuf = estrdup(path);
}
ptr = pathbuf;
while (ptr && *ptr) {
end = strchr(ptr, DEFAULT_DIR_SEPARATOR);
if (end != NULL) {
*end = '\0';
end++;
}
snprintf(trypath, MAXPATHLEN, "%s/%s", ptr, filename);
if (((options & STREAM_DISABLE_OPEN_BASEDIR) == 0) && php_check_open_basedir(trypath TSRMLS_CC)) {
stream = NULL;
goto stream_done;
}
if (PG(safe_mode)) {
if (VCWD_STAT(trypath, &sb) == 0) {
/* file exists ... check permission */
if ((php_check_safe_mode_include_dir(trypath TSRMLS_CC) == 0) ||
php_checkuid(trypath, mode, CHECKUID_CHECK_MODE_PARAM)) {
/* UID ok, or trypath is in safe_mode_include_dir */
stream = php_stream_fopen_rel(trypath, mode, opened_path, options);
} else {
stream = NULL;
}
goto stream_done;
}
}
stream = php_stream_fopen_rel(trypath, mode, opened_path, options);
if (stream) {
stream_done:
efree(pathbuf);
return stream;
}
ptr = end;
} /* end provided path */
efree(pathbuf);
return NULL;
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4 fdm=marker
* vim<600: noet sw=4 ts=4
*/
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