#include <u.h>#include <libc.h>#include "group.h" intloadgroups(Groups *gs, char *raw){	char *m, *s, *e, *a[5], *ide;	Group *g, *memb;	int line, n, k;	vlong id; 	memset(gs, 0, sizeof(*gs));	if((gs->raw = strdup(raw)) == nil)		goto error; 	line = 1;	for(s = gs->raw; *s; s = e+1, line++){		if((e = strchr(s, '\n')) != nil)			*e = 0; 		if((n = getfields(s, a, nelem(a), 1, ":")) >= 3 && strlen(a[0]) > 0 && strlen(a[2]) > 0){			if((id = strtoll(a[2], &ide, 0)) < 0 || id > 0xffffffff || *ide != 0){				werrstr("invalid uid: %s", a[2]);				goto error;			} 			if((g = realloc(gs->g, (gs->ng+1)*sizeof(Group))) == nil)				goto error;			gs->g = g;			g += gs->ng++;			memset(g, 0, sizeof(*g));			g->id = id;			g->name = a[0];			for(m = a[3]; n > 3 && *m; *m++ = 0){				if((memb = realloc(g->memb, (g->nmemb+1)*sizeof(Group))) == nil)					goto error;				g->memb = memb;				memb += g->nmemb++;				memset(memb, 0, sizeof(*memb));				memb->name = m;				if((m = strchr(m, ',')) == nil)					break;			}		}else{			werrstr("line %d: invalid record", line);			goto error;		} 		if(e == nil)			break;	} 	g = gs->g;	for(n = 0; n < gs->ng; n++, g++){		for(k = 0, memb = g->memb; k < g->nmemb; k++, memb++)			findgroup(gs, memb->name, &memb->id);	} 	return 0;error:	werrstr("togroups: %r");	freegroups(gs); 	return -1;} voidfreegroups(Groups *gs){	int i; 	for(i = 0; i < gs->ng; i++)		free(gs->g[i].memb);	free(gs->g);	free(gs->raw);} Group *findgroup(Groups *gs, char *name, u32int *id){	Group *g;	int i; 	g = gs->g;	for(i = 0; i < gs->ng; i++, g++){		if(strcmp(g->name, name) == 0){			if(id != nil)				*id = g->id;			return g;		}	} 	if(id != nil)		*id = ~0; 	return nil;} Group *findgroupid(Groups *gs, u32int id){	Group *g;	int i; 	g = gs->g;	for(i = 0; i < gs->ng; i++, g++){		if(g->id == id)			return g;	} 	return nil;} intingroup(Group *g, u32int id){	int i; 	if(g->id == id)		return 1; 	for(i = g->nmemb, g = g->memb; i > 0; i--, g++){		if(g->id == id)			return 1;	} 	return 0;}