159 lines
2.6 KiB
HTML
159 lines
2.6 KiB
HTML
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>SG_NEXT_CMD_LEN</TITLE
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NAME="N_CMD_LEN">8.9. SG_NEXT_CMD_LEN</H1
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><P
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><B
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>SG_NEXT_CMD_LEN 0x2283. </B
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>This ioctl() is not required with sg_io_hdr structure since command length
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is set explicitly for every command.
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Assumes 3rd argument is pointing to an int. The value of the int (if > 0)
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will be used as the SCSI command length of the next SCSI command sent to
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a write() using the sg_header interface. After that write() the SCSI
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command length logic is reset to use automatic length detection (i.e.
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depending on SCSI command group and the 'twelve_byte' field). If the
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current SCSI command length maximum of 16 is exceeded then the affected
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write() will yield an EDOM error. Giving this ioctl() a value of 0 will
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set automatic length detection for the next write(). N.B. Only the following
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write() on this fd is affected by this ioctl().</P
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