61 lines
1.1 KiB
C
61 lines
1.1 KiB
C
#include "idprom.h"
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static int idprom_init = 0;
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static struct idprom idprom_copy;
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static int idprom_ok = 0;
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int idprom_open(dev, oflags, devtype, p)
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dev_t dev;
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int oflags;
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int devtype;
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struct proc *p;
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{
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int unit,s;
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unit = UNIT(dev);
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if (unit >= NIDPROM)
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return ENXIO;
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if (!idprom_init) idprom_ok = idprom_fetch(&idprom_copy, IDPROM_VERSION);
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if (!idprom_ok) return EIO;
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return 0;
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}
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int idprom_close(dev, fflag, devtype, p)
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dev_t dev;
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int fflag;
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int devtype;
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struct proc *p;
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{
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int unit;
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unit = minor(dev);
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if (unit >= NIDPROM)
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return ENXIO;
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return 0;
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}
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idprom_read(dev, uio, ioflag)
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dev_t dev;
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struct uio *uio;
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int ioflag;
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{
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int error, unit,length;
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unit = minor(dev);
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if (unit >= NIDPROM)
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return ENXIO;
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error = 0;
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while (uio->uio_resid > 0) {
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if (uio->uio_offset >= IDPROM_SIZE) break; /* past or at end */
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length = min(uio->uio_resid, (IDPROM_SIZE-uio->uio_offset));
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error = uiomove((caddr_t) &idprom_copy, length, uio);
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}
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return error;
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}
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