/*  * 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 <bio.h>#include <auth.h> /* *  see if user is in the group noworld, i.e., has all file *  priviledges masked with 770, and all directories with *  771, before checking access rights */intnoworld(char *user){	Biobuf *b;	char *p;	int n; 	b = Bopen("/adm/users", OREAD);	if(b == nil)		return 0;	while((p = Brdline(b, '\n')) != nil){		p[Blinelen(b)-1] = 0;		p = strchr(p, ':');		if(p == nil)			continue;		if(strncmp(p, ":noworld:", 9) == 0){			p += 9;			break;		}	}	n = strlen(user);	while(p != nil && *p != 0){		p = strstr(p, user);		if(p == nil)			break;		if(*(p-1) == ':' || *(p-1) == ',')		if(*(p+n) == ':' || *(p+n) == ',' || *(p+n) == 0){			Bterm(b);			return 1;		}		p++;	}	Bterm(b);	return 0;}