file.c

php-4.4.7学习linux时下载的源代码

/*
   +----------------------------------------------------------------------+
   | PHP Version 4                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2007 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:           |
   | http://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          |
   | [e-mail] so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Authors: Rasmus Lerdorf <[e-mail]>                             |
   |          Stig Bakken <[e-mail]>                                   |
   |          Andi Gutmans <[e-mail]>                                |
   |          Zeev Suraski <[e-mail]>                                |
   | PHP 4.0 patches by Thies C. Arntzen ([e-mail])               |
   | PHP streams by Wez Furlong ([e-mail])                    |
   +----------------------------------------------------------------------+
 */

/* $Id: file.c,v 1.279.2.70.2.8 2007/01/01 09:46:48 sebastian Exp $ */

/* Synced with php 3.0 revision 1.218 1999-06-16 [ssb] */

/* {{{ includes */

#include "php.h"
#include "php_globals.h"
#include "ext/standard/flock_compat.h"
#include "ext/standard/exec.h"
#include "ext/standard/php_filestat.h"
#include "php_open_temporary_file.h"
#include "ext/standard/basic_functions.h"
#include "php_ini.h"

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifdef PHP_WIN32
#include <io.h>
#include <windows.h>
#include <winsock.h>
#define O_RDONLY _O_RDONLY
#include "win32/param.h"
#include "win32/winutil.h"
#else
#include <sys/param.h>
#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#if defined(NETWARE) && defined(USE_WINSOCK)
#include <novsock2.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#endif
#if HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#endif
#include "ext/standard/head.h"
#include "safe_mode.h"
#include "php_string.h"
#include "file.h"
#if HAVE_PWD_H
#ifdef PHP_WIN32
#include "win32/pwd.h"
#else
#include <pwd.h>
#endif
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include "fsock.h"
#include "fopen_wrappers.h"
#include "php_streams.h"
#include "php_globals.h"

#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif

#if MISSING_FCLOSE_DECL
extern int fclose(FILE *);
#endif

#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif

#ifndef MAP_FAILED
#define MAP_FAILED ((void *) -1)
#endif

#include "scanf.h"
#include "zend_API.h"

#ifdef ZTS
int file_globals_id;
#else
php_file_globals file_globals;
#endif

#ifdef HAVE_FNMATCH
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <fnmatch.h>
#endif

/* }}} */

#define PHP_STREAM_TO_ZVAL(stream, arg) \
	php_stream_from_zval_no_verify(stream, arg); \
	if (stream == NULL) {	\
		RETURN_FALSE;	\
	}

/* {{{ ZTS-stuff / Globals / Prototypes */

/* sharing globals is *evil* */
static int le_stream_context = FAILURE;

PHPAPI int php_le_stream_context(void)
{
	return le_stream_context;
}

/* }}} */
/* {{{ Module-Stuff */

static ZEND_RSRC_DTOR_FUNC(file_context_dtor)
{
	php_stream_context *context = (php_stream_context*)rsrc->ptr;
	if (context->options) {
		zval_ptr_dtor(&context->options);
		context->options = NULL;
	}
	php_stream_context_free(context);
}

static void file_globals_ctor(php_file_globals *file_globals_p TSRMLS_DC)
{
	FG(pclose_ret) = 0;
	FG(user_stream_current_filename) = NULL;
	FG(def_chunk_size) = PHP_SOCK_CHUNK_SIZE;
}

static void file_globals_dtor(php_file_globals *file_globals_p TSRMLS_DC)
{
}


PHP_INI_BEGIN()
	STD_PHP_INI_ENTRY("user_agent", NULL, PHP_INI_ALL, OnUpdateString, user_agent, php_file_globals, file_globals)
	STD_PHP_INI_ENTRY("default_socket_timeout", "60", PHP_INI_ALL, OnUpdateInt, default_socket_timeout, php_file_globals, file_globals)
	STD_PHP_INI_ENTRY("auto_detect_line_endings", "0", PHP_INI_ALL, OnUpdateInt, auto_detect_line_endings, php_file_globals, file_globals)
PHP_INI_END()

PHP_MINIT_FUNCTION(file)
{
	le_stream_context = zend_register_list_destructors_ex(file_context_dtor, NULL, "stream-context", module_number);

#ifdef ZTS
	ts_allocate_id(&file_globals_id, sizeof(php_file_globals), (ts_allocate_ctor) file_globals_ctor, (ts_allocate_dtor) file_globals_dtor);
#else
	file_globals_ctor(&file_globals TSRMLS_CC);
#endif

	REGISTER_INI_ENTRIES();

	REGISTER_LONG_CONSTANT("SEEK_SET", SEEK_SET, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("SEEK_CUR", SEEK_CUR, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("SEEK_END", SEEK_END, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("LOCK_SH", 1, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("LOCK_EX", 2, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("LOCK_UN", 3, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("LOCK_NB", 4, CONST_CS | CONST_PERSISTENT);

	REGISTER_LONG_CONSTANT("STREAM_NOTIFY_CONNECT", 		PHP_STREAM_NOTIFY_CONNECT,			CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("STREAM_NOTIFY_AUTH_REQUIRED",	PHP_STREAM_NOTIFY_AUTH_REQUIRED,	CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("STREAM_NOTIFY_AUTH_RESULT",		PHP_STREAM_NOTIFY_AUTH_RESULT,		CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("STREAM_NOTIFY_MIME_TYPE_IS",	PHP_STREAM_NOTIFY_MIME_TYPE_IS,		CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("STREAM_NOTIFY_FILE_SIZE_IS",	PHP_STREAM_NOTIFY_FILE_SIZE_IS,		CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("STREAM_NOTIFY_REDIRECTED",		PHP_STREAM_NOTIFY_REDIRECTED,		CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("STREAM_NOTIFY_PROGRESS",		PHP_STREAM_NOTIFY_PROGRESS,			CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("STREAM_NOTIFY_FAILURE",			PHP_STREAM_NOTIFY_FAILURE,			CONST_CS | CONST_PERSISTENT);

	REGISTER_LONG_CONSTANT("STREAM_NOTIFY_SEVERITY_INFO",	PHP_STREAM_NOTIFY_SEVERITY_INFO, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("STREAM_NOTIFY_SEVERITY_WARN",	PHP_STREAM_NOTIFY_SEVERITY_WARN, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("STREAM_NOTIFY_SEVERITY_ERR",	PHP_STREAM_NOTIFY_SEVERITY_ERR,  CONST_CS | CONST_PERSISTENT);

#ifdef HAVE_FNMATCH
	REGISTER_LONG_CONSTANT("FNM_NOESCAPE", FNM_NOESCAPE, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("FNM_PATHNAME", FNM_PATHNAME, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("FNM_PERIOD",   FNM_PERIOD,   CONST_CS | CONST_PERSISTENT);
#ifdef FNM_CASEFOLD /* a GNU extension */ /* TODO emulate if not available */
	REGISTER_LONG_CONSTANT("FNM_CASEFOLD", FNM_CASEFOLD, CONST_CS | CONST_PERSISTENT);
#endif
#endif

	return SUCCESS;
}

/* }}} */

PHP_MSHUTDOWN_FUNCTION(file)
{
#ifndef ZTS
	file_globals_dtor(&file_globals TSRMLS_CC);
#endif
	return SUCCESS;
}



/* {{{ proto bool flock(resource fp, int operation [, int &wouldblock])
   Portable file locking */

static int flock_values[] = { LOCK_SH, LOCK_EX, LOCK_UN };

PHP_FUNCTION(flock)
{
	zval **arg1, **arg2, **arg3;
	int fd, act, arg_count = ZEND_NUM_ARGS();
	php_stream *stream;

	if (arg_count < 2 || arg_count > 3 || zend_get_parameters_ex(arg_count, &arg1, &arg2, &arg3) == FAILURE) {
		WRONG_PARAM_COUNT;
	}

	PHP_STREAM_TO_ZVAL(stream, arg1);

	if (php_stream_cast(stream, PHP_STREAM_AS_FD, (void*)&fd, 1) == FAILURE)	{
		RETURN_FALSE;
	}

	convert_to_long_ex(arg2);

	act = Z_LVAL_PP(arg2) & 3;
	if (act < 1 || act > 3) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Illegal operation argument");
		RETURN_FALSE;
	}

	if (arg_count == 3) {
		convert_to_long_ex(arg3);
		Z_LVAL_PP(arg3) = 0;
	}

	/* flock_values contains all possible actions
	   if (arg2 & 4) we won't block on the lock */
	act = flock_values[act - 1] | (Z_LVAL_PP(arg2) & 4 ? LOCK_NB : 0);
	if (flock(fd, act)) {
		if (errno == EWOULDBLOCK && arg_count == 3) {
			Z_LVAL_PP(arg3) = 1;
		} else {
			RETURN_FALSE;
		}
	}
	RETURN_TRUE;
}

/* }}} */

#define PHP_META_UNSAFE ".\\+*?[^]$() "

/* {{{ proto array get_meta_tags(string filename [, bool use_include_path])
   Extracts all meta tag content attributes from a file and returns an array */

PHP_FUNCTION(get_meta_tags)
{
	char *filename;
	int filename_len;
	zend_bool use_include_path = 0;
	int in_tag = 0, done = 0;
	int looking_for_val = 0, have_name = 0, have_content = 0;
	int saw_name = 0, saw_content = 0;
	char *name = NULL, *value = NULL, *temp = NULL;
	php_meta_tags_token tok, tok_last;
	php_meta_tags_data md;

	/* Initiailize our structure */
	memset(&md, 0, sizeof(md));

	/* Parse arguments */
	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|b",
							  &filename, &filename_len, &use_include_path) == FAILURE) {
		return;
	}

	md.stream = php_stream_open_wrapper(filename, "rb",
			(use_include_path ? USE_PATH : 0) | ENFORCE_SAFE_MODE | REPORT_ERRORS,
			NULL);

	if (!md.stream)	{
		RETURN_FALSE;
	}

	array_init(return_value);

	tok_last = TOK_EOF;

	while (!done && (tok = php_next_meta_token(&md TSRMLS_CC)) != TOK_EOF) {
		if (tok == TOK_ID) {
			if (tok_last == TOK_OPENTAG) {
				md.in_meta = !strcasecmp("meta", md.token_data);
			} else if (tok_last == TOK_SLASH && in_tag) {
				if (strcasecmp("head", md.token_data) == 0) {
					/* We are done here! */
					done = 1;
				}
			} else if (tok_last == TOK_EQUAL && looking_for_val) {
				if (saw_name) {
					/* Get the NAME attr (Single word attr, non-quoted) */
					temp = name = estrndup(md.token_data, md.token_len);

					while (temp && *temp) {
						if (strchr(PHP_META_UNSAFE, *temp)) {
							*temp = '_';
						}
						temp++;
					}

					have_name = 1;
				} else if (saw_content) {
					/* Get the CONTENT attr (Single word attr, non-quoted) */
					if (PG(magic_quotes_runtime)) {
						value = php_addslashes(md.token_data, 0, &md.token_len, 0 TSRMLS_CC);
					} else {
						value = estrndup(md.token_data, md.token_len);
					}

					have_content = 1;
				}

				looking_for_val = 0;
			} else {
				if (md.in_meta) {
					if (strcasecmp("name", md.token_data) == 0) {
						saw_name = 1;
						saw_content = 0;
						looking_for_val = 1;
					} else if (strcasecmp("content", md.token_data) == 0) {
						saw_name = 0;
						saw_content = 1;
						looking_for_val = 1;
					}
				}
			}
		} else if (tok == TOK_STRING && tok_last == TOK_EQUAL && looking_for_val) {
			if (saw_name) {
				/* Get the NAME attr (Quoted single/double) */
				temp = name = estrndup(md.token_data, md.token_len);

				while (temp && *temp) {
					if (strchr(PHP_META_UNSAFE, *temp)) {
						*temp = '_';
					}
					temp++;
				}

				have_name = 1;
			} else if (saw_content) {
				/* Get the CONTENT attr (Single word attr, non-quoted) */
				if (PG(magic_quotes_runtime)) {
					value = php_addslashes(md.token_data, 0, &md.token_len, 0 TSRMLS_CC);
				} else {
					value = estrndup(md.token_data, md.token_len);
				}

				have_content = 1;
			}

			looking_for_val = 0;
		} else if (tok == TOK_OPENTAG) {
			if (looking_for_val) {
				looking_for_val = 0;
				have_name = saw_name = 0;
				have_content = saw_content = 0;
			}
			in_tag = 1;
		} else if (tok == TOK_CLOSETAG) {
			if (have_name) {
				/* For BC */
				php_strtolower(name, strlen(name));
				if (have_content) {
					add_assoc_string(return_value, name, value, 0);
				} else {
					add_assoc_string(return_value, name, empty_string, 0);
				}

				efree(name);
			} else if (have_content) {
				efree(value);
			}

			name = value = NULL;

			/* Reset all of our flags */
			in_tag = looking_for_val = 0;
			have_name = saw_name = 0;
			have_content = saw_content = 0;
			md.in_meta = 0;
		}

		tok_last = tok;

		if (md.token_data)
			efree(md.token_data);

		md.token_data = NULL;
	}

	php_stream_close(md.stream);
}

/* }}} */

/* {{{ proto string file_get_contents(string filename [, bool use_include_path])
   Read the entire file into a string */
PHP_FUNCTION(file_get_contents)
{
	char *filename;
	int filename_len;
	char *contents = NULL;
	zend_bool use_include_path = 0;
	php_stream *stream;
	int len, newlen;

	/* Parse arguments */
	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|b",
							  &filename, &filename_len, &use_include_path) == FAILURE) {
		return;
	}

	stream = php_stream_open_wrapper(filename, "rb",
			(use_include_path ? USE_PATH : 0) | ENFORCE_SAFE_MODE | REPORT_ERRORS,
			NULL);
	if (!stream) {
		RETURN_FALSE;
	}

	/* uses mmap if possible */
	if ((len = php_stream_copy_to_mem(stream, &contents, PHP_STREAM_COPY_ALL, 0)) > 0) {
		if (PG(magic_quotes_runtime)) {
			contents = php_addslashes(contents, len, &newlen, 1 TSRMLS_CC); /* 1 = free source string */
			len = newlen;
		}

		RETVAL_STRINGL(contents, len, 0);
		contents = NULL;
	} else if (len == 0) {
		RETVAL_EMPTY_STRING();
	} else {
		RETVAL_FALSE;
	}

	if (contents) {
		efree(contents);
	}

	php_stream_close(stream);

}
/* }}} */

/* {{{ proto array file(string filename [, bool use_include_path])
   Read entire file into an array */

#define PHP_FILE_BUF_SIZE	80

PHP_FUNCTION(file)
{
	char *filename;
	int filename_len;
	char *slashed, *target_buf=NULL, *p, *s, *e;
	register int i = 0;
	int target_len, len;
	char eol_marker = '\n';
	zend_bool use_include_path = 0;
	php_stream *stream;

	/* Parse arguments */
	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|b",
							  &filename, &filename_len, &use_include_path) == FAILURE) {
		return;
	}

	stream = php_stream_open_wrapper(filename, "rb",
			(use_include_path ? USE_PATH : 0) | ENFORCE_SAFE_MODE | REPORT_ERRORS,
			NULL);
	if (!stream) {