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