/* * nubfs: Control File System */ #include "dat.h"#include "fns.h" static usize ctlio(Fid*, void*, usize, u64int, int); voidctlinit(Entry *r, String *user){	Entry *cf; 	cf = mkentry(r, "ctl", (Qid){1, 0, 0}, 0664, user, user, NOW, 0);	cf->io = ctlio;} static usizectlwrite(Fid *f, void *a, usize count){	char req[512], *flds[10];	int n; 	USED(f);	if(count > sizeof(req)-1)		raise(Elength);	memmove(req, a, count);	req[count] = 0;	n = tokenize(req, flds, nelem(flds));	if(n < 1)		raise(Ebadctl);	if(strcmp(flds[0], "halt") == 0)		exiting = 1;	else if(strcmp(flds[0], "sync") == 0)		nubflush();	else if(strcmp(flds[0], "uname") == 0)		unamecmd(n-1, flds+1);	else if(strcmp(flds[0], "sweep") == 0)		nubsweep();	else if(strcmp(flds[0], "allow") == 0)		wstatallow = 1;	else if(strcmp(flds[0], "disallow") == 0)		wstatallow = 0;	else if(strcmp(flds[0], "permit") == 0)		nopermcheck = 1;	else if(strcmp(flds[0], "nopermit") == 0)		nopermcheck = 0;	else		raise(Ebadctl);	return count;} static usizectlio(Fid *f, void *a, usize count, u64int offset, int write){	USED(offset);	if(write)		return ctlwrite(f, a, count);	return 0;}