[unix-history] / usr / src / libI77 / rewind.c

#include "fio.h"
f_rew(a) alist *a;
{
	unit *b;
	if(a->aunit>=MXUNIT || a->aunit<0) err(a->aerr,101,"rewind");
	b = &units[a->aunit];
	if(b->ufd==NULL && fk_open(READ,SEQ,FMT,a->aunit)) err(a->aerr,114,"rewind")
	if(!b->useek) err(a->aerr,106,"rewind")
	if(b->uwrt)
	{	nowreading(b);
		t_runc(b);
	}
	rewind(b->ufd);
	b->uend=0;
	return(0);
}
Commit	Line	Data
7a517deb TL	1	#include "fio.h"
	2	f_rew(a) alist *a;
	3	{
	4	unit *b;
	5	if(a->aunit>=MXUNIT \|\| a->aunit<0) err(a->aerr,101,"rewind");
	6	b = &units[a->aunit];
	7	if(b->ufd==NULL && fk_open(READ,SEQ,FMT,a->aunit)) err(a->aerr,114,"rewind")
	8	if(!b->useek) err(a->aerr,106,"rewind")
	9	if(b->uwrt)
	10	{ nowreading(b);
	11	t_runc(b);
	12	}
	13	rewind(b->ufd);
	14	b->uend=0;
	15	return(0);
	16	}