/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include <u.h>#include <libc.h>#include <draw.h>#include <event.h>#include <bio.h>#include "page.h" int resizing;int mknewwindow;int doabort;int chatty;int reverse = -1;int goodps = 1;int ppi = 100;int teegs = 0;int truetoboundingbox;int textbits=4, gfxbits=4;int wctlfd = -1;int stdinfd;int truecolor;int imagemode;int notewatcher;int notegp; intwatcher(void*, char *x){	if(strcmp(x, "die") != 0)		postnote(PNGROUP, notegp, x);	_exits(0);	return 0;} intbell(void *u, char *x){	if(x && strcmp(x, "hangup") == 0)		_exits(0); 	if(x && strstr(x, "die") == nil)		fprint(2, "postnote %d: %s\n", getpid(), x); 	/* alarms come from the gs monitor */	if(x && strstr(x, "alarm")){		postnote(PNGROUP, getpid(), "die (gs error)");		postnote(PNPROC, notewatcher, "die (gs error)");	} 	/* function mentions u so that it's in the stack trace */	if((u == nil || u != x) && doabort)		abort(); /*	fprint(2, "exiting %d\n", getpid()); */	wexits("note");	return 0;} static intafmt(Fmt *fmt){	char *s; 	s = va_arg(fmt->args, char*);	if(s == nil || s[0] == '\0')		return fmtstrcpy(fmt, "");	else		return fmtprint(fmt, "%#q", s);} voidusage(void){	fprint(2, "usage: page [-biRrw] [-p ppi] file...\n");	exits("usage");} voidmain(int argc, char **argv){	Document *doc;	Biobuf *b;	enum { Ninput = 16 };	uchar buf[Ninput+1];	int readstdin; 	ARGBEGIN{	/* "temporary" debugging options */	case 'P':		goodps = 0;		break;	case 'v':		chatty++;		break;	case 'V':		teegs++;		break;	case 'a':		doabort++;		break;	case 'T':		textbits = atoi(EARGF(usage()));		gfxbits = atoi(EARGF(usage()));		break; 	/* real options */	case 'R':		resizing = 1;		break;	case 'r':		reverse = 1;		break;	case 'p':		ppi = atoi(EARGF(usage()));		break;	case 'b':		truetoboundingbox = 1;		break;	case 'w':		mknewwindow = 1;		resizing = 1;		break;	case 'i':		imagemode = 1;		break;	default:		usage();	}ARGEND; 	notegp = getpid(); 	switch(notewatcher = fork()){	case -1:		sysfatal("fork");		exits(0);	default:		break;	case 0:		atnotify(watcher, 1);		for(;;)			sleep(1000);		/* not reached */	} 	rfork(RFNOTEG);	atnotify(bell, 1); 	readstdin = 0;	if(imagemode == 0 && argc == 0){		readstdin = 1;		stdinfd = dup(0, -1);		close(0);		open("/dev/cons", OREAD);	} 	quotefmtinstall();	fmtinstall('a', afmt); 	fmtinstall('R', Rfmt);	fmtinstall('P', Pfmt);	if(mknewwindow)		newwin(); 	if(readstdin){		b = nil;		if(readn(stdinfd, buf, Ninput) != Ninput){			fprint(2, "page: short read reading %s\n", argv[0]);			wexits("read");		}	}else if(argc != 0){		if(!(b = Bopen(argv[0], OREAD))) {			fprint(2, "page: cannot open \"%s\"\n", argv[0]);			wexits("open");		}	 		if(Bread(b, buf, Ninput) != Ninput) {			fprint(2, "page: short read reading %s\n", argv[0]);			wexits("read");		}	}else		b = nil; 	buf[Ninput] = '\0';	if(imagemode)		doc = initgfx(nil, 0, nil, nil, 0);	else if(strncmp((char*)buf, "%PDF-", 5) == 0)		doc = initpdf(b, argc, argv, buf, Ninput);	else if(strncmp((char*)buf, "\x04%!", 2) == 0)		doc = initps(b, argc, argv, buf, Ninput);	else if(buf[0] == '\x1B' && strstr((char*)buf, "@PJL"))		doc = initps(b, argc, argv, buf, Ninput);	else if(strncmp((char*)buf, "%!", 2) == 0)		doc = initps(b, argc, argv, buf, Ninput);	else if(strcmp((char*)buf, "\xF7\x02\x01\x83\x92\xC0\x1C;") == 0)		doc = initdvi(b, argc, argv, buf, Ninput);	else if(strncmp((char*)buf, "\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1", 8) == 0)		doc = initmsdoc(b, argc, argv, buf, Ninput);	else if(strncmp((char*)buf, "x T ", 4) == 0)		doc = inittroff(b, argc, argv, buf, Ninput);	else {		if(ppi != 100) {			fprint(2, "page: you can't specify -p with graphic files\n");			wexits("-p and graphics");		}		doc = initgfx(b, argc, argv, buf, Ninput);	} 	if(doc == nil) {		fprint(2, "page: error reading file: %r\n");		wexits("document init");	} 	if(doc->npage < 1 && !imagemode) {		fprint(2, "page: no pages found?\n");		wexits("pagecount");	} 	if(reverse == -1) /* neither cmdline nor ps reader set it */		reverse = 0; 	if(initdraw(0, 0, "page") < 0){		fprint(2, "page: initdraw failed: %r\n");		wexits("initdraw");	}	display->locking = 1; 	truecolor = screen->depth > 8;	viewer(doc);	wexits(0);} voidwexits(char *s){	if(s && *s && strcmp(s, "note") != 0 && mknewwindow)		sleep(10*1000);	postnote(PNPROC, notewatcher, "die");	exits(s);}