#include <u.h>#include <libc.h>#include <bio.h>#include <ctype.h>#include "authcmdlib.h"  #define TABLEN 8 static char*defreadln(char *prompt, char *def, int must, int *changed){	char pr[512];	char reply[256]; 	do {		if(def && *def){			if(must)				snprint(pr, sizeof pr, "%s[return = %s]: ", prompt, def);			else				snprint(pr, sizeof pr, "%s[return = %s, space = none]: ", prompt, def);		} else			snprint(pr, sizeof pr, "%s: ", prompt);		readln(pr, reply, sizeof(reply), 0);		switch(*reply){		case ' ':			break;		case 0:			return def;		default:			*changed = 1;			if(def)				free(def);			return strdup(reply);		}	} while(must); 	if(def){		*changed = 1;		free(def);	}	return 0;} /* *  get bio from stdin */intquerybio(char *file, char *user, Acctbio *a){	int i;	int changed; 	rdbio(file, user, a);	a->postid = defreadln("Post id", a->postid, 0, &changed);	a->name = defreadln("User's full name", a->name, 1, &changed);	a->dept = defreadln("Department #", a->dept, 1, &changed);	a->email[0] = defreadln("User's email address", a->email[0], 1, &changed);	a->email[1] = defreadln("Sponsor's email address", a->email[1], 0, &changed);	for(i = 2; i < Nemail; i++){		if(a->email[i-1] == 0)			break;		a->email[i] = defreadln("other email address", a->email[i], 0, &changed);	}	return changed;}