EMILE/libunix/read.c
2006-09-15 14:55:39 +00:00

33 lines
634 B
C

/*
*
* (c) 2004,2005 Laurent Vivier <Laurent@lvivier.info>
*
*/
#include <sys/types.h>
#include <macos/devices.h>
#include <macos/serial.h>
ssize_t read(int fd, void *buf, size_t count)
{
int res;
ParamBlockRec param;
long available;
res = SerGetBuf(fd, &available);
if ( (res != noErr) || (available == 0) )
return 0;
param.ioCompletion = 0;
param.ioVRefNum = 0;
param.ioRefNum = fd;
param.ioBuffer = (u_int32_t)buf;
param.ioReqCount= count > available ? available : count;
param.ioPosMode = fsAtMark;
param.ioPosOffset = 0;
res = PBReadSync(&param);
if (res != noErr)
return 0;
return param.ioActCount;
}