js_file.c

/* js_file.c */

/* Synchronet JavaScript "File" Object */

/* $Id$ */

/****************************************************************************
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 *																			*
 * Copyright 2013 Rob Swindell - http://www.synchro.net/copyright.html		*
 *																			*
 * This program is free software; you can redistribute it and/or			*
 * modify it under the terms of the GNU General Public License				*
 * as published by the Free Software Foundation; either version 2			*
 * of the License, or (at your option) any later version.					*
 * See the GNU General Public License for more details: gpl.txt or			*
 * http://www.fsf.org/copyleft/gpl.html										*
 *																			*
 * Anonymous FTP access to the most recent released source is available at	*
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 *																			*
 * Anonymous CVS access to the development source and modification history	*
 * is available at cvs.synchro.net:/cvsroot/sbbs, example:					*
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 *     (just hit return, no password is necessary)							*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs checkout src		*
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 ****************************************************************************/

#include "sbbs.h"
#include "md5.h"
#include "base64.h"
#include "uucode.h"
#include "yenc.h"
#include "ini_file.h"

#ifdef JAVASCRIPT

#include "js_request.h"

typedef struct
{
	FILE*	fp;
	char	name[MAX_PATH+1];
	char	mode[4];
	uchar	etx;
	BOOL	external;	/* externally created, don't close */
	BOOL	debug;
	BOOL	rot13;
	BOOL	yencoded;
	BOOL	uuencoded;
	BOOL	b64encoded;
	BOOL	network_byte_order;
	BOOL	pipe;		/* Opened with popen() use pclose() to close */

} private_t;

static const char* getprivate_failure = "line %d %s JS_GetPrivate failed";

static void dbprintf(BOOL error, private_t* p, char* fmt, ...)
{
	va_list argptr;
	char sbuf[1024];

	if(p==NULL || (!p->debug && !error))
		return;

    va_start(argptr,fmt);
    vsnprintf(sbuf,sizeof(sbuf),fmt,argptr);
	sbuf[sizeof(sbuf)-1]=0;
    va_end(argptr);
	
	lprintf(LOG_DEBUG,"%04u File %s%s",p->fp ? fileno(p->fp) : 0,error ? "ERROR: ":"",sbuf);
}

/* Converts fopen() style 'mode' string into open() style 'flags' integer */

static int fopenflags(char *mode)
{
	int flags=0;

	if(strchr(mode,'b'))
		flags|=O_BINARY;
	else
		flags|=O_TEXT;

	if(strchr(mode,'w')) {
		flags|=O_CREAT|O_TRUNC;
		if(strchr(mode,'+'))
			flags|=O_RDWR;
		else
			flags|=O_WRONLY;
		return(flags);
	}

	if(strchr(mode,'a')) {
		flags|=O_CREAT|O_APPEND;
		if(strchr(mode,'+'))
			flags|=O_RDWR;
		else
			flags|=O_WRONLY;
		return(flags);
	}

	if(strchr(mode,'r')) {
		if(strchr(mode,'+'))
			flags|=O_RDWR;
		else
			flags|=O_RDONLY;
	}

	if(strchr(mode,'e'))
		flags|=O_EXCL;

	return(flags);
}

/* File Object Methods */

static JSBool
js_open(JSContext *cx, uintN argc, jsval *arglist)
{
	JSObject *obj=JS_THIS_OBJECT(cx, arglist);
	jsval *argv=JS_ARGV(cx, arglist);
	BOOL		shareable=FALSE;
	int			file;
	uintN		i;
	jsint		bufsize=2*1024;
	JSString*	str;
	private_t*	p;
	jsrefcount	rc;

	JS_SET_RVAL(cx, arglist, JSVAL_FALSE);

	if((p=(private_t*)JS_GetPrivate(cx,obj))==NULL) {
		JS_ReportError(cx,getprivate_failure,WHERE);
		return(JS_FALSE);
	}

	if(p->fp!=NULL)  
		return(JS_TRUE);

	SAFECOPY(p->mode,"w+");		/* default mode */
	for(i=0;i<argc;i++) {
		if(JSVAL_IS_STRING(argv[i])) {	/* mode */
			if((str = JS_ValueToString(cx, argv[i]))==NULL) {
				JS_ReportError(cx,"Invalid mode specified: %s",str);
				return(JS_TRUE);
			}
			JSSTRING_TO_STRBUF(cx, str, p->mode, sizeof(p->mode), NULL);
		}
		else if(JSVAL_IS_BOOLEAN(argv[i]))	/* shareable */
			shareable=JSVAL_TO_BOOLEAN(argv[i]);
		else if(JSVAL_IS_NUMBER(argv[i])) {	/* bufsize */
			if(!JS_ValueToInt32(cx,argv[i],&bufsize))
				return(JS_FALSE);
		}
	}

	rc=JS_SUSPENDREQUEST(cx);
	if(shareable)
		p->fp=fopen(p->name,p->mode);
	else {
		if((file=nopen(p->name,fopenflags(p->mode)))!=-1) {
			char *fdomode=strdup(p->mode);
			char *e=fdomode;

			if(fdomode && e) {
				for(e=strchr(fdomode, 'e'); e ; e=strchr(e, 'e'))
					memmove(e, e+1, strlen(e));
				if((p->fp=fdopen(file,fdomode))==NULL)
					close(file);
			}
			free(fdomode);
		}
	}
	if(p->fp!=NULL) {
		JS_SET_RVAL(cx, arglist, JSVAL_TRUE);
		dbprintf(FALSE, p, "opened: %s",p->name);
		if(!bufsize)
			setvbuf(p->fp,NULL,_IONBF,0);	/* no buffering */
		else {
#ifdef _WIN32
			if(bufsize < 2)
				bufsize = 2;
#endif
			setvbuf(p->fp,NULL,_IOFBF,bufsize);
		}
	}
	JS_RESUMEREQUEST(cx, rc);

	return(JS_TRUE);