parser3/src/main/pa_common.C - diff

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Diff for /parser3/src/main/pa_common.C between versions 1.127 and 1.143.2.19

version 1.127, 2002/11/25 14:57:33	version 1.143.2.19, 2003/02/14 17:38:29
Line 1	Line 1
/** @file	/** @file
Parser: commonly functions.	Parser: commonly functions.

Copyright(c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)	Copyright(c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com)
Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)	Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
*/	*/

Line 9 static const char* IDENT_COMMON_C="$Date	Line 9 static const char* IDENT_COMMON_C="$Date

#include "pa_common.h"	#include "pa_common.h"
#include "pa_exception.h"	#include "pa_exception.h"
#include "pa_globals.h"
#include "pa_hash.h"	#include "pa_hash.h"
#include "pa_vstring.h"	#include "pa_vstring.h"
	#include "pa_vint.h"
	#include "pa_globals.h"

#ifdef WIN32	#ifdef CYGWIN
# include <windows.h>	#define _GNU_H_WINDOWS32_SOCKETS
	// for PASCAL
	#include <windows.h>
	// SOCKET
	typedef u_int SOCKET;
	int PASCAL closesocket(SOCKET);
#else	#else
# define closesocket close	# if defined(WIN32)
	# include <windows.h>
	# else
	# define closesocket close
	# endif
#endif	#endif

// some maybe-undefined constants	// some maybe-undefined constants
Line 28 static const char* IDENT_COMMON_C="$Date	Line 38 static const char* IDENT_COMMON_C="$Date
# define _O_BINARY 0	# define _O_BINARY 0
#endif	#endif

	#ifdef HAVE_FTRUNCATE
	# define PA_O_TRUNC 0
	#else
	# ifdef _O_TRUNC
	# define PA_O_TRUNC _O_TRUNC
	# else
	# error you must have either ftruncate function or _O_TRUNC bit declared
	# endif
	#endif

// locking constants	// locking constants

#ifdef HAVE_FLOCK	#ifdef HAVE_FLOCK
Line 73 static int unlock(int fd) { FLOCK(F_TLOC	Line 93 static int unlock(int fd) { FLOCK(F_TLOC
#endif	#endif
#endif	#endif

#define DEFAULT_USER_AGENT "parser3"	// defines for globals

	#define FILE_STATUS_NAME "status"

	// globals

static char* strnchr(char* buf, size_t size, char c) {	StringPtr file_status_name(new String(FILE_STATUS_NAME));
// sanity check
if(!buf)
return 0;

for(; size-->0; buf++) {	// defines for statics
if(*buf==c)
return buf;
}

return 0;	#define HTTP_METHOD_NAME "method"
}	#define HTTP_TIMEOUT_NAME "timeout"
	#define HTTP_HEADERS_NAME "headers"
	#define HTTP_ANY_STATUS_NAME "any-status"

	// statics

	static StringPtr http_method_name(new String(HTTP_METHOD_NAME));
	static StringPtr http_timeout_name(new String(HTTP_TIMEOUT_NAME));
	static StringPtr http_headers_name(new String(HTTP_HEADERS_NAME));
	static StringPtr http_any_status_name(new String(HTTP_ANY_STATUS_NAME));

	// defines

	#define DEFAULT_USER_AGENT "parser3"

	// functions

void fix_line_breaks(char* buf, size_t& size) {	void fix_line_breaks(char* buf, size_t& size) {
	if(size==0)
	return;

//_asm int 3;	//_asm int 3;
const char* const eob=buf+size;	const char* const eob=buf+size;
char* dest=buf;	char* dest=buf;
// fix DOS: \r\n -> \n	// fix DOS: \r\n -> \n
// fix Macintosh: \r -> \n	// fix Macintosh: \r -> \n
char* bol=buf;	char* bol=buf;
while(char* eol=strnchr(bol, eob -bol, '\r')) {	while(char* eol=(char*)memchr(bol, '\r', eob -bol)) {
size_t len=eol-bol;	size_t len=eol-bol;
if(dest!=bol)	if(dest!=bol)
memcpy(dest, bol, len);	memcpy(dest, bol, len);
Line 115 void fix_line_breaks(char* buf, size_t&	Line 149 void fix_line_breaks(char* buf, size_t&
memcpy(dest, bol, eob-bol);	memcpy(dest, bol, eob-bol);
}	}

char* file_read_text(Pool& pool, const String& file_spec,	char* file_read_text(Pool& pool, Charset& charset,
	StringPtr file_spec,
bool fail_on_read_problem,	bool fail_on_read_problem,
Hash params, Hash* out_fields) {	HashStringValue* params/, HashStringValuePtr out_fields*/) {
void *result; size_t size;	File_read_result file=
return file_read(pool, file_spec, result, size, true, params, out_fields, fail_on_read_problem)?(char *)result:0;	file_read(pool, charset, file_spec, true, params, fail_on_read_problem);
	return file.success?file.data:0;
}	}

//http request stuff	//http request stuff
Line 139 static bool set_addr(struct sockaddr_in	Line 175 static bool set_addr(struct sockaddr_in
return true;	return true;
}	}

static void http_read_response(String& response, int sock){	static int http_read_response(Pool& pool, String& response, int sock, bool fail_on_status_ne_200){
	int result=0;
	ssize_t EOLat=0;
while(true) {	while(true) {
char buf=(char )response.pool().malloc(MAX_STRING);	char buf=(char )pool.malloc(MAX_STRING);
ssize_t size=recv(sock, buf, MAX_STRING, 0);	ssize_t size=recv(sock, buf, MAX_STRING, 0);
if(size<=0)	if(size<=0)
break;	break;
response.APPEND_TAINTED(buf, size, "http response", 0);	response.APPEND_TAINTED(buf, size, "remote HTTP server response", 0);
}	if(!result && (EOLat=response.pos("\r\n", 2))>=0) { // checking status in first response
	StringPtr status_line=response.mid(0, (size_t)EOLat);
	ArrayString astatus;
	status_line->split(astatus, 0, " ", 1);
	StringPtr status_code=astatus.get(1);
	result=status_code->as_int();

	if(fail_on_status_ne_200 && result!=200)
	throw Exception("http.status",
	status_code,
	"invalid HTTP response status");
	}
	}
	if(result)
	return result;
	else
	throw Exception("http.response",
	Exception::undefined_source,
	"bad response from host - no status found (size=%lu)", response.size());
}	}

/* ******************** request ************************* */	/* ******************** request ************************* */
Line 162 static void timeout_handler(int sig){	Line 218 static void timeout_handler(int sig){
}	}
#endif	#endif

static void http_request(String& response,	static int http_request(Pool& pool,
const String *origin_string,	String& response,
const char* host, int port,	StringPtr origin_string,
const char* request,	const char* host, int port,
int timeout){	const char* request,
	int timeout,
	bool fail_on_status_ne_200) {
if(!host)	if(!host)
throw Exception("http.host",	throw Exception("http.host",
origin_string,	origin_string,
Line 177 static void http_request(String& respons	Line 235 static void http_request(String& respons
#endif	#endif
int sock=-1;	int sock=-1;
try {	try {
	int result;
#ifdef WE_CAN_USE_ALARM	#ifdef WE_CAN_USE_ALARM
if(sigsetjmp(timeout_env, 1))	if(sigsetjmp(timeout_env, 1))
throw Exception("http.timeout",	throw Exception("http.timeout",
Line 206 static void http_request(String& respons	Line 265 static void http_request(String& respons
origin_string,	origin_string,
"error sending request: %s (%d)", strerror(errno), errno);	"error sending request: %s (%d)", strerror(errno), errno);

http_read_response(response, sock);	result=http_read_response(pool, response, sock, fail_on_status_ne_200);
if(sock>=0)	closesocket(sock);
closesocket(sock);
#ifdef WE_CAN_USE_ALARM	#ifdef WE_CAN_USE_ALARM
	alarm(0);
}	}
#endif	#endif
	return result;
} catch(...) {	} catch(...) {
if(sock>=0)	if(sock>=0)
closesocket(sock);	closesocket(sock);
#ifdef WE_CAN_USE_ALARM	#ifdef WE_CAN_USE_ALARM
alarm(0);	alarm(0);
#endif	#endif
/re/throw;	rethrow;
}	}
}	}

#ifndef DOXYGEN	#ifndef DOXYGEN
struct Http_pass_header_info {	struct Http_pass_header_info {
	Pool* pool;
	Charset* charset;
String* request;	String* request;
bool user_agent_specified;	bool user_agent_specified;
};	};
#endif	#endif
static void http_pass_header(const Hash::Key& key, Hash::Val value, void info)	static void http_pass_header(HashStringValue::key_type key, HashStringValue::value_type value,
{	Http_pass_header_info *info) {
Http_pass_header_info& i=static_cast<Http_pass_header_info >(info);	(info->request)<<key<<": "
Pool& pool=i.request->pool();	<< attributed_meaning_to_string(info->pool, value, String::UL_HTTP_HEADER, false)
	<<"\n";
(i.request)<<key<<": "<<(static_cast<Value *>(value))->get_string()<<"\n";
	if(key->change_case(info->pool, *info->charset, String::CC_UPPER)=="USER-AGENT")
if(key.change_case(pool, String::CC_UPPER)=="USER-AGENT")	info->user_agent_specified=true;
i.user_agent_specified=true;	}
}	#ifndef DOXYGEN
static void file_read_http(Pool& pool, const String& file_spec,	struct File_read_http_info {
void*& data, size_t& data_size,	char *data; size_t data_size;
Hash options=0, Hash* out_fields=0) {	HashStringValuePtr headers;
	};
	#endif
	static File_read_http_info file_read_http(Pool& pool, Charset& charset, StringPtr file_spec,
	HashStringValue *options=0) {
	File_read_http_info result;
char host[MAX_STRING];	char host[MAX_STRING];
char* uri;	const char* uri;
int port;	int port;
const char* method="GET";	CharPtr method(0);
int timeout=2;	int timeout=2;
Value *vheaders=0;	bool fail_on_status_ne_200=true;
	ValuePtr vheaders(0);

char* connect_string=file_spec.cstr(String::UL_UNSPECIFIED);	StringPtr connect_string(new String());
if(strncmp(connect_string, "http://", 7)!=0)	// not in ^sql{... UL_SQL ...} spirit, but closer to ^file::load one
	connect_string->append(*file_spec, String::UL_URI); // tainted pieces -> URI pieces

	CharPtr connect_string_cstr=connect_string->cstr(String::UL_UNSPECIFIED);
	const char* current=connect_string_cstr;
	if(strncmp(current, "http://", 7)!=0)
throw Exception(0,	throw Exception(0,
&file_spec,	connect_string,
"does not start with http://"); //never	"does not start with http://"); //never
connect_string+=7;	current+=7;

strncpy(host, connect_string, sizeof(host)-1); host[sizeof(host)-1]=0;	strncpy(host, current, sizeof(host)-1); host[sizeof(host)-1]=0;
char* host_uri=lsplit(host, '/');	char* host_uri=lsplit(host, '/');
uri=host_uri?connect_string+(host_uri-1-host):"/";	uri=host_uri?current+(host_uri-1-host):"/";
char* port_cstr=lsplit(host, ':');	char* port_cstr=lsplit(host, ':');
char* error_pos=0;	char* error_pos=0;
port=port_cstr?strtol(port_cstr, &error_pos, 0):80;	port=port_cstr?strtol(port_cstr, &error_pos, 0):80;

if(options) {	if(options) {
int valid_options=0;	int valid_options=0;
if(Value vmethod=static_cast<Value >(options->get(*http_method_name))) {	if(ValuePtr vmethod=options->get(http_method_name)) {
valid_options++;	valid_options++;
method=vmethod->as_string().cstr();	method=vmethod->as_string(&pool)->cstr();
}	}
if(Value vtimeout=static_cast<Value >(options->get(*http_timeout_name))) {	if(ValuePtr vtimeout=options->get(http_timeout_name)) {
valid_options++;	valid_options++;
timeout=vtimeout->as_int();	timeout=vtimeout->as_int();
}	}
if(vheaders=static_cast<Value >(options->get(http_headers_name))) {	if(vheaders=options->get(http_headers_name)) {
	valid_options++;
	}
	if(ValuePtr vany_status=options->get(http_any_status_name)) {
valid_options++;	valid_options++;
	fail_on_status_ne_200=!vany_status->as_bool();
}	}
if(valid_options!=options->size())
	if(valid_options!=options->count())
throw Exception("parser.runtime",	throw Exception("parser.runtime",
0,	Exception::undefined_source,
"invalid option passed");	"invalid option passed");
}	}

//making request	//making request
String request(pool);	String request;
request<< method <<" "<< uri <<" HTTP/1.0\nHost: "<< host<<"\n";	if(method)
	request<<method;
	else
	request<<"GET";
	request<< " "<< uri <<" HTTP/1.0\nHost: "<< host<<"\n";
bool user_agent_specified=false;	bool user_agent_specified=false;
if(vheaders && !vheaders->is_string()) { // allow empty	if(vheaders && !vheaders->is_string()) { // allow empty
if(Hash *headers=vheaders->get_hash(&file_spec)) {	if(HashStringValue *headers=vheaders->get_hash(connect_string)) {
Http_pass_header_info info={&request};	Http_pass_header_info info={&pool, &charset, &request};
headers->for_each(http_pass_header, &info);	headers->for_each(http_pass_header, &info);
user_agent_specified=info.user_agent_specified;	user_agent_specified=info.user_agent_specified;
} else	} else
throw Exception("parser.runtime",	throw Exception("parser.runtime",
&file_spec,	connect_string,
"headers param must be hash");	"headers param must be hash");
};	};
if(!user_agent_specified) // defaulting	if(!user_agent_specified) // defaulting
Line 300 static void file_read_http(Pool& pool, c	Line 382 static void file_read_http(Pool& pool, c
request<<"\n";	request<<"\n";

//sending request	//sending request
String response(pool);	String response;
http_request(response,	CharPtr request_cstr=request.cstr(String::UL_UNSPECIFIED);
&file_spec, host, port, request.cstr(String::UL_UNSPECIFIED), timeout);	int status_code=http_request(pool, response,
	connect_string, host, port, request_cstr,
	timeout, fail_on_status_ne_200);

//processing results	//processing results
int pos=response.pos("\r\n\r\n", 4);	int pos=response.pos("\r\n\r\n", 4);
if(pos<1){	if(pos<1){
throw Exception("http.response",	throw Exception("http.response",
&file_spec,	connect_string,
"bad response from host - no headers found");	"bad response from host - no headers found");
}	}
String header_block=response.mid(0, pos);	StringPtr header_block=response.mid(0, pos);
String body=response.mid(pos+4, response.size());	StringPtr body=response.mid(pos+4, response.size());

Array aheaders(pool);	ArrayString aheaders;
Hash& headers=*new(pool) Hash(pool);	result.headers=HashStringValuePtr(new HashStringValue);
size_t pos_after_ref=0;	header_block->split(aheaders, 0, "\r\n", 2);
header_block.split(aheaders, &pos_after_ref, "\r\n", 2);

//processing status code
const String *status_line=aheaders.get_string(0);
if(!status_line){
throw Exception("http.response",
&file_spec,
"bad response from host - no status line ");
}
//processing headers	//processing headers
Array astatus(pool);	for(int i=1; i<aheaders.count(); i++) {
pos_after_ref=0;	StringPtr line=aheaders.get(i);
status_line->split(astatus, &pos_after_ref, " ", 1);	pos=line->pos(": ", 2);
const String * status_code=astatus.get_string(1);	if(pos<1)

for(int i=1;i<aheaders.size();i++) {
if(const String *line=aheaders.get_string(i)) {
pos=line->pos(": ", 2);
if(pos<1)
throw Exception("http.response",
&file_spec,
"bad response from host - bad header \"%s\"", line->cstr());

headers.put(line->mid(0, pos), new(pool) VString(line->mid(pos+2, line->size())));
} else
throw Exception("http.response",	throw Exception("http.response",
&file_spec,	connect_string,
"bad response from host - bad headers \"%s\"", header_block.cstr());	"bad response from host - bad header \"%s\"", line->cstr().get());

	result.headers->put(
	line->mid(0, pos)->change_case(pool, charset, String::CC_UPPER),
	ValuePtr(new VString(line->mid(pos+2, line->size()))));
}	}

// output response	// output response
data=body.cstr(); data_size=body.size();	result.data=new(pool) char[result.data_size=body->size()];
if(out_fields) {	body->store_to(*result.data, String::UL_AS_IS);
headers.put(file_status_name, new(pool) VString(status_code));	result.headers->put(file_status_name, ValuePtr(new VInt(status_code)));
*out_fields=&headers;	return result;
}
}	}

#ifndef DOXYGEN	#ifndef DOXYGEN
struct File_read_action_info {	struct File_read_action_info {
void *data; size_t data_size;	char *data; size_t data_size;
};	};
#endif	#endif
static void file_read_action(Pool& pool,	static void file_read_action(Pool& pool,
struct stat& finfo,	struct stat& finfo,
int f,	int f,
const String& file_spec, const char* fname, bool as_text,	StringPtr file_spec, const char* fname, bool as_text,
void *context) {	void *context) {
File_read_action_info& info=static_cast<File_read_action_info >(context);	File_read_action_info& info=static_cast<File_read_action_info >(context);
if(size_t to_read_size=(size_t)finfo.st_size) {	if(size_t to_read_size=(size_t)finfo.st_size) {
*info.data=pool.malloc(to_read_size+(as_text?1:0), 3);	*info.data=pool.malloc(to_read_size+(as_text?1:0));
info.data_size=(size_t)read(f, info.data, to_read_size);	info.data_size=(size_t)read(f, info.data, to_read_size);

if(ssize_t(info.data_size)<0 \|\| info.data_size>to_read_size)	if(ssize_t(info.data_size)<0 \|\| info.data_size>to_read_size)
throw Exception(0,	throw Exception(0,
&file_spec,	file_spec,
"read failed: actually read %lu bytes count not in [0..%lu] valid range",	"read failed: actually read %lu bytes count not in [0..%lu] valid range",
*info.data_size, to_read_size);	*info.data_size, to_read_size);
} else { // empty file	} else { // empty file
Line 385 static void file_read_action(Pool& pool,	Line 453 static void file_read_action(Pool& pool,
return;	return;
}	}
}	}
bool file_read(Pool& pool, const String& file_spec,	File_read_result file_read(Pool& pool, Charset& charset, StringPtr file_spec,
void*& data, size_t& data_size,	bool as_text, HashStringValue *params,
bool as_text, Hash params, Hash* out_fields,
bool fail_on_read_problem) {	bool fail_on_read_problem) {
bool result;	File_read_result result;
if(file_spec.starts_with("http://", 7)) {	if(file_spec->starts_with("http://", 7)) {
// fail on read problem	// fail on read problem
file_read_http(pool, file_spec, data, data_size, params, out_fields);	result.headers=file_read_http(pool, charset, file_spec, params).headers;
result=true;	result.success=true;
} else {	} else {
File_read_action_info info={&data, &data_size};	File_read_action_info info={&result.data, &result.size};
result=file_read_action_under_lock(pool, file_spec,	result.success=file_read_action_under_lock(pool, file_spec,
"read", file_read_action, &info,	"read", file_read_action, &info,
as_text, fail_on_read_problem);	as_text, fail_on_read_problem);
}	}

if(result && as_text) {	if(result.success && as_text) {
fix_line_breaks((char *)(data), data_size);	// UTF-8 signature: EF BB BF
	if(result.size>=3) {
	char in=(char )result.data;
	if((in[0] == '\xEF') && (in[1] == '\xBB') &&
	(in[2] == '\xBF')) {
	result.data=in+3; result.size-=3;// skip prefix
	}
	}

	fix_line_breaks((char *)(result.data), result.size);
// note: after fixing	// note: after fixing
((char*&)(data))[data_size]=0;	((char*&)(result.data))[result.size]=0;
}	}

return result;	return result;
}	}

bool file_read_action_under_lock(Pool& pool, const String& file_spec,	bool file_read_action_under_lock(Pool& pool, StringPtr file_spec,
const char* action_name, File_read_action action, void *context,	const char* action_name, File_read_action action, void *context,
bool as_text,	bool as_text,
bool fail_on_read_problem) {	bool fail_on_read_problem) {
const char* fname=file_spec.cstr(String::UL_FILE_SPEC);	CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC);
int f;	int f;

// first open, next stat:	// first open, next stat:
Line 430 bool file_read_action_under_lock(Pool& p	Line 506 bool file_read_action_under_lock(Pool& p
try {	try {
if(lock_shared_blocking(f)!=0)	if(lock_shared_blocking(f)!=0)
throw Exception("file.lock",	throw Exception("file.lock",
&file_spec,	file_spec,
"shared lock failed: %s (%d), actual filename '%s'",	"shared lock failed: %s (%d), actual filename '%s'",
strerror(errno), errno, fname);	strerror(errno), errno, fname.get());

struct stat finfo;	struct stat finfo;
if(stat(fname, &finfo)!=0)	if(stat(fname, &finfo)!=0)
throw Exception("file.missing", // hardly possible: we just opened it OK	throw Exception("file.missing", // hardly possible: we just opened it OK
&file_spec,	file_spec,
"stat failed: %s (%d), actual filename '%s'",	"stat failed: %s (%d), actual filename '%s'",
strerror(errno), errno, fname);	strerror(errno), errno, fname.get());

#ifdef NO_FOREIGN_GROUP_FILES	#ifdef PA_SAFE_MODE
if(finfo.st_gid/foreign?/!=getegid()) {	if(finfo.st_uid/foreign?/!=geteuid()
	&& finfo.st_gid/foreign?/!=getegid())
throw Exception("parser.runtime",	throw Exception("parser.runtime",
&file_spec,	file_spec,
"parser reading files of foreign group disabled [recompile parser without --disable-foreign-group-files configure option], actual filename '%s'",	"parser is in safe mode: reading files of foreign group and user disabled [recompile parser with --disable-safe-mode configure option], actual filename '%s'",
fname);	fname.get());
#endif	#endif

action(pool, finfo, f, file_spec, fname, as_text, context);	action(pool, finfo, f, file_spec, fname, as_text, context);
} catch(...) {	} catch(...) {
unlock(f);close(f);	unlock(f);close(f);
if(fail_on_read_problem)	if(fail_on_read_problem)
/re/throw;	rethrow;
return false;	return false;
}	}

Line 462 bool file_read_action_under_lock(Pool& p	Line 539 bool file_read_action_under_lock(Pool& p
} else {	} else {
if(fail_on_read_problem)	if(fail_on_read_problem)
throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,	throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
&file_spec,	file_spec,
"%s failed: %s (%d), actual filename '%s'",	"%s failed: %s (%d), actual filename '%s'",
action_name, strerror(errno), errno, fname);	action_name, strerror(errno), errno, fname.get());
return false;	return false;
}	}
}	}

static void create_dir_for_file(const String& file_spec) {	static void create_dir_for_file(StringPtr file_spec) {
size_t pos_after=1;	size_t pos_after=1;
int pos_before;	int pos_before;
while((pos_before=file_spec.pos("/", 1, pos_after))>=0) {	while((pos_before=file_spec->pos("/", 1, pos_after))>=0) {
mkdir(file_spec.mid(0, pos_before).cstr(String::UL_FILE_SPEC), 0775);	mkdir(file_spec->mid(0, pos_before)->cstr(String::UL_FILE_SPEC), 0775);
pos_after=pos_before+1;	pos_after=pos_before+1;
}	}
}	}

bool file_write_action_under_lock(	bool file_write_action_under_lock(
const String& file_spec,	StringPtr file_spec,
const char* action_name, File_write_action action, void *context,	const char* action_name, File_write_action action, void *context,
bool as_text,	bool as_text,
bool do_append,	bool do_append,
bool do_block,	bool do_block,
bool fail_on_lock_problem) {	bool fail_on_lock_problem) {
const char* fname=file_spec.cstr(String::UL_FILE_SPEC);	CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC);
int f;	int f;
if(access(fname, W_OK)!=0) // no	if(access(fname, W_OK)!=0) // no
create_dir_for_file(file_spec);	create_dir_for_file(file_spec);
Line 493 bool file_write_action_under_lock(	Line 570 bool file_write_action_under_lock(
if((f=open(fname,	if((f=open(fname,
O_CREAT\|O_RDWR	O_CREAT\|O_RDWR
\|(as_text?_O_TEXT:_O_BINARY)	\|(as_text?_O_TEXT:_O_BINARY)
\|(do_append?O_APPEND:0), 0664))>=0) {	\|(do_append?O_APPEND:PA_O_TRUNC), 0664))>=0) {
if((do_block?lock_exclusive_blocking(f):lock_exclusive_nonblocking(f))!=0) {	if((do_block?lock_exclusive_blocking(f):lock_exclusive_nonblocking(f))!=0) {
Exception e("file.lock",	Exception e("file.lock",
&file_spec,	file_spec,
"shared lock failed: %s (%d), actual filename '%s'",	"shared lock failed: %s (%d), actual filename '%s'",
strerror(errno), errno, fname);	strerror(errno), errno, fname.get());
close(f);	close(f);
if(fail_on_lock_problem)	if(fail_on_lock_problem)
throw e;	throw e;
Line 508 bool file_write_action_under_lock(	Line 585 bool file_write_action_under_lock(
try {	try {
action(f, context);	action(f, context);
} catch(...) {	} catch(...) {
	#ifdef HAVE_FTRUNCATE
if(!do_append)	if(!do_append)
ftruncate(f, lseek(f, 0, SEEK_CUR)); // one can not use O_TRUNC, read lower	ftruncate(f, lseek(f, 0, SEEK_CUR)); // one can not use O_TRUNC, read lower
	#endif
unlock(f);close(f);	unlock(f);close(f);
/re/throw;	rethrow;
}	}

	#ifdef HAVE_FTRUNCATE
if(!do_append)	if(!do_append)
ftruncate(f, lseek(f, 0, SEEK_CUR)); // O_TRUNC truncates even exclusevely write-locked file [thanks to Igor Milyakov <virtan@rotabanner.com> for discovering]	ftruncate(f, lseek(f, 0, SEEK_CUR)); // O_TRUNC truncates even exclusevely write-locked file [thanks to Igor Milyakov <virtan@rotabanner.com> for discovering]
	#endif
unlock(f);close(f);	unlock(f);close(f);
return true;	return true;
} else	} else
throw Exception(errno==EACCES?"file.access":0,	throw Exception(errno==EACCES?"file.access":0,
&file_spec,	file_spec,
"%s failed: %s (%d), actual filename '%s'",	"%s failed: %s (%d), actual filename '%s'",
action_name, strerror(errno), errno, fname);	action_name, strerror(errno), errno, fname.get());
// here should be nothing, see rethrow above	// here should be nothing, see rethrow above
}	}

#ifndef DOXYGEN	#ifndef DOXYGEN
struct File_write_action_info {	struct File_write_action_info {
const void *data; size_t size;	const char *data; size_t size;
};	};
#endif	#endif
static void file_write_action(int f, void *context) {	static void file_write_action(int f, void *context) {
Line 537 static void file_write_action(int f, voi	Line 618 static void file_write_action(int f, voi
int written=write(f, info.data, info.size);	int written=write(f, info.data, info.size);
if(written<0)	if(written<0)
throw Exception(0,	throw Exception(0,
0,	Exception::undefined_source,
"write failed: %s (%d)", strerror(errno), errno);	"write failed: %s (%d)", strerror(errno), errno);
}	}
}	}
void file_write(	void file_write(
const String& file_spec,	StringPtr file_spec,
const void *data, size_t size,	const char *data, size_t size,
bool as_text,	bool as_text,
bool do_append) {	bool do_append) {
File_write_action_info info={data, size};	File_write_action_info info={data, size};
file_write_action_under_lock(	file_write_action_under_lock(
file_spec,	file_spec,
"write", file_write_action, &info,	"write", file_write_action, &info,
as_text,	as_text,
do_append);	do_append);
}	}

// throws nothing! [this is required in file_move & file_delete]	// throws nothing! [this is required in file_move & file_delete]
static void rmdir(const String& file_spec, size_t pos_after) {	static void rmdir(StringPtr file_spec, size_t pos_after) {
int pos_before;	int pos_before;
if((pos_before=file_spec.pos("/", 1, pos_after))>=0)	if((pos_before=file_spec->pos("/", 1, pos_after))>=0)
rmdir(file_spec, pos_before+1);	rmdir(file_spec, pos_before+1);

rmdir(file_spec.mid(0, pos_after-1/* / */).cstr(String::UL_FILE_SPEC));	rmdir(file_spec->mid(0, pos_after-1/* / */)->cstr(String::UL_FILE_SPEC));
}	}
bool file_delete(const String& file_spec, bool fail_on_read_problem) {	bool file_delete(StringPtr file_spec, bool fail_on_read_problem) {
const char* fname=file_spec.cstr(String::UL_FILE_SPEC);	CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC);
if(unlink(fname)!=0)	if(unlink(fname)!=0)
if(fail_on_read_problem)	if(fail_on_read_problem)
throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,	throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
&file_spec,	file_spec,
"unlink failed: %s (%d), actual filename '%s'",	"unlink failed: %s (%d), actual filename '%s'",
strerror(errno), errno, fname);	strerror(errno), errno, fname.get());
else	else
return false;	return false;

rmdir(file_spec, 1);	rmdir(file_spec, 1);
return true;	return true;
}	}
void file_move(const String& old_spec, const String& new_spec) {	void file_move(StringPtr old_spec, StringPtr new_spec) {
const char* old_spec_cstr=old_spec.cstr(String::UL_FILE_SPEC);	CharPtr old_spec_cstr=old_spec->cstr(String::UL_FILE_SPEC);
const char* new_spec_cstr=new_spec.cstr(String::UL_FILE_SPEC);	CharPtr new_spec_cstr=new_spec->cstr(String::UL_FILE_SPEC);

create_dir_for_file(new_spec);	create_dir_for_file(new_spec);

if(rename(old_spec_cstr, new_spec_cstr)!=0)	if(rename(old_spec_cstr, new_spec_cstr)!=0)
throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,	throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
&old_spec,	old_spec,
"rename failed: %s (%d), actual filename '%s' to '%s'",	"rename failed: %s (%d), actual filename '%s' to '%s'",
strerror(errno), errno, old_spec_cstr, new_spec_cstr);	strerror(errno), errno, old_spec_cstr.get(), new_spec_cstr.get());

rmdir(old_spec, 1);	rmdir(old_spec, 1);
}	}
Line 600 bool entry_exists(const char* fname, str	Line 681 bool entry_exists(const char* fname, str
return result;	return result;
}	}

bool entry_exists(const String& file_spec) {	bool entry_exists(StringPtr file_spec) {
const char* fname=file_spec.cstr(String::UL_FILE_SPEC);	CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC);
return entry_exists(fname, 0);	return entry_exists(fname, 0);
}	}

static bool entry_readable(const String& file_spec, bool need_dir) {	static bool entry_readable(StringPtr file_spec, bool need_dir) {
char* fname=file_spec.cstr(String::UL_FILE_SPEC);	CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC);
if(need_dir) {	if(need_dir) {
size_t size=strlen(fname);	size_t size=strlen(fname);
while(size) {	while(size) {
Line 624 static bool entry_readable(const String&	Line 705 static bool entry_readable(const String&
}	}
return false;	return false;
}	}
bool file_readable(const String& file_spec) {	bool file_readable(StringPtr file_spec) {
return entry_readable(file_spec, false);	return entry_readable(file_spec, false);
}	}
bool dir_readable(const String& file_spec) {	bool dir_readable(StringPtr file_spec) {
return entry_readable(file_spec, true);	return entry_readable(file_spec, true);
}	}
String *file_readable(const String& path, const String& name) {	StringPtr file_readable(String& path, String& name) {
String *result=new(path.pool()) String(path);	StringPtr result(new String(path));
*result << "/";	*result << "/";
*result << name;	*result << name;
return file_readable(*result)?result:0;	return file_readable(result)?result:StringPtr(0);
}	}
bool file_executable(const String& file_spec) {	bool file_executable(StringPtr file_spec) {
return access(file_spec.cstr(String::UL_FILE_SPEC), X_OK)==0;	return access(file_spec->cstr(String::UL_FILE_SPEC), X_OK)==0;
}	}

bool file_stat(const String& file_spec,	bool file_stat(StringPtr file_spec,
size_t& rsize,	size_t& rsize,
time_t& ratime,	time_t& ratime,
time_t& rmtime,	time_t& rmtime,
time_t& rctime,	time_t& rctime,
bool fail_on_read_problem) {	bool fail_on_read_problem) {
Pool& pool=file_spec.pool();	CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC);
const char* fname=file_spec.cstr(String::UL_FILE_SPEC);
struct stat finfo;	struct stat finfo;
if(stat(fname, &finfo)!=0)	if(stat(fname, &finfo)!=0)
if(fail_on_read_problem)	if(fail_on_read_problem)
throw Exception("file.missing",	throw Exception("file.missing",
&file_spec,	file_spec,
"getting file size failed: %s (%d), real filename '%s'",	"getting file size failed: %s (%d), real filename '%s'",
strerror(errno), errno, fname);	strerror(errno), errno, fname.get());
else	else
return false;	return false;
rsize=finfo.st_size;	rsize=finfo.st_size;
Line 706 char* rsplit(char* string, char delim) {	Line 786 char* rsplit(char* string, char delim) {
}	}

/// @todo less stupid type detection	/// @todo less stupid type detection
char* format(Pool& pool, double value, char* fmt) {	const char* format(Pool& pool, double value, char* fmt) {
char local_buf[MAX_NUMBER];	char local_buf[MAX_NUMBER];
size_t size;	size_t size;

Line 721 char* format(Pool& pool, double value, c	Line 801 char* format(Pool& pool, double value, c
else	else
size=snprintf(local_buf, sizeof(local_buf), "%d", (int)value);	size=snprintf(local_buf, sizeof(local_buf), "%d", (int)value);

char* pool_buf=(char *)pool.malloc(size+1, 4);	return pool.copy(local_buf, size+1);
memcpy(pool_buf, local_buf, size+1);
return pool_buf;
}	}

size_t stdout_write(const void *buf, size_t size) {	size_t stdout_write(const void *buf, size_t size) {
Line 743 size_t stdout_write(const void *buf, siz	Line 821 size_t stdout_write(const void *buf, siz
}	}

char* unescape_chars(Pool& pool, const char* cp, int len) {	char* unescape_chars(Pool& pool, const char* cp, int len) {
char* s=(char *)pool.malloc(len + 1, 5);	char* s=pool.malloc(len + 1);
enum EscapeState {	enum EscapeState {
EscapeRest,	EscapeRest,
EscapeFirst,	EscapeFirst,
Line 864 int __vsnprintf(char* b, size_t s, const	Line 942 int __vsnprintf(char* b, size_t s, const
win32:	win32:
mk:@MSITStore:C:\Program%20Files\Microsoft%20Visual%20Studio\MSDN\2001APR\1033\vccore.chm::/html/_crt__vsnprintf.2c_._vsnwprintf.htm	mk:@MSITStore:C:\Program%20Files\Microsoft%20Visual%20Studio\MSDN\2001APR\1033\vccore.chm::/html/_crt__vsnprintf.2c_._vsnwprintf.htm

if the number of bytes to write exceeds buffer, then count bytes are written and �1 is returned	if the number of bytes to write exceeds buffer, then count bytes are written and �1 is returned
*/	*/
r=_vsnprintf(b, s, f, l);	r=_vsnprintf(b, s, f, l);
if(r<0)	if(r<0)
Line 912 int pa_sleep(unsigned long secs, unsigne	Line 990 int pa_sleep(unsigned long secs, unsigne
return (select(0, NULL, NULL, NULL, &t) == -1 ? errno : 0);	return (select(0, NULL, NULL, NULL, &t) == -1 ? errno : 0);
#endif	#endif
}	}

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Removed from v.1.127
changed lines
	Added in v.1.143.2.19