/*  * 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> voidusage(void){	print("status=usage\n");	exits(0);} char*findarg(char *flags, Rune r){	char *p;	Rune rr;		for(p=flags; p!=(char*)1; p=strchr(p, ',')+1){		chartorune(&rr, p);		if(rr == r)			return p;	}	return nil;	} intcountargs(char *p){	int n; 	n = 1;	while(*p == ' ')		p++;	for(; *p && *p != ','; p++)		if(*p == ' ' && *(p-1) != ' ')			n++;	return n;} voidmain(int argc, char *argv[]){	char *flags, *p, buf[512];	int i, n;	Fmt fmt;		doquote = needsrcquote;	quotefmtinstall();	argv0 = argv[0];	/* for sysfatal */		flags = getenv("flagfmt");	if(flags == nil){		fprint(2, "$flagfmt not set\n");		print("exit 'missing flagfmt'");		exits(0);	} 	fmtfdinit(&fmt, 1, buf, sizeof buf);	for(p=flags; p!=(char*)1; p=strchr(p, ',')+1)		fmtprint(&fmt, "flag%.1s=()\n", p);	ARGBEGIN{	default:		if((p = findarg(flags, ARGC())) == nil)			usage();		p += runelen(ARGC());		if(*p == ',' || *p == 0){			fmtprint(&fmt, "flag%C=1\n", ARGC());			break;		}		n = countargs(p);		fmtprint(&fmt, "flag%C=(", ARGC());		for(i=0; i<n; i++)			fmtprint(&fmt, "%s%q", i ? " " : "", EARGF(usage()));		fmtprint(&fmt, ")\n");	}ARGEND		fmtprint(&fmt, "*=(");	for(i=0; i<argc; i++)		fmtprint(&fmt, "%s%q", i ? " " : "", argv[i]);	fmtprint(&fmt, ")\n");	fmtprint(&fmt, "status=''\n");	fmtfdflush(&fmt);	exits(0);}