struct utmp *utmp_next() /* return pointer to next struct */
{
struct utmp *recp;
if(fd_utmp == -1)
return NULLUT;
if(cur_rec == num_recs && utmp_reload() == 0)
return NULLUT;
/* get address of next record */
recp = (struct utmp *) &utmpbuf[cur_rec * UTSIZE];
cur_rec++;
return recp;
}
struct utmp * utmp_next()
{
struct utmp * recp;
if ( fd_utmp == -1 ) // error?
return NULLUT;
if ( cur_rec == num_recs && utmp_reload() == 0) // any more?
return NULLUT;
recp = ( struct utmp*) &utmpbuf[cur_rec * UTSIZE]; // get address of next record
cur_rec++;
return recp;
}
struct utmp *utmp_next()
{
struct utmp *recp;
if (fd_utmp == -1)
return NULLUT;
if (cur_rec == num_recs && utmp_reload() == 0)
return NULLUT;
recp = ( struct utmp *) &utmpbuf[cur_rec * UTSIZE];
cur_rec++;
return recp;
}
struct utmp *utmp_next() /* next utmp loading */
{
struct utmp *recp; //utmp
if ( fd_utmp == -1 ) // null check
return NULLUT;
if ( cur_rec==num_recs && utmp_reload()==0 )
return NULLUT;
recp = ( struct utmp *) &utmpbuf[cur_rec * UTSIZE]; // loading utmp
cur_rec++; // recursive ++
return recp;
}
struct utmp *utmp_next()
{
struct utmp *recp;
if ( fd_utmp == -1 ) /* error ? */
return NULL;
if ( cur_rec==num_recs && utmp_reload()==0 ) /* any more ? */
return NULL;
/* get address of next record */
recp = (struct utmp *) &utmpbuf[cur_rec * UTSIZE];
cur_rec++;
return recp;
}
struct utmp * utmp_next()
{
struct utmp *recp;
if(fd_utmp == -1)
return NULLUT;
if(cur_rec == num_recs && utmp_reload() ==0)
return NULLUT;
//一次读取一个结构体
recp = (struct utmp *)&utmpbuf[cur_rec * UTSIZE];
//当前记录的位置
cur_rec++;
//结构体内容
return recp;
}
struct utmp *utmp_next()
{
struct utmp *recp;
//如果文件读取失败，则返回null
if (fd_utmp == -1)
return NULLUT;
//没有下一条记录了，文件读取结束
if (cur_rec == num_recs && utmp_reload() == 0)
return NULLUT;
//读取记录，并且cur_rec加1
recp = (struct utmp *)&utmpbuf[cur_rec * UTSIZE];
cur_rec++;
return recp;
}
struct utmp* utmp_next()
{
struct utmp *putmp;
while(1)
{
if (cur_record == num_record && utmp_reload() == 0)
{
return NULL;
}
putmp = (struct utmp*)(utmpbuf + UTMP_SIZE * cur_record);
cur_record++;
if (putmp->ut_type == USER_PROCESS)
{
return putmp;
}
}
}
