187 lines
2.7 KiB
HTML
187 lines
2.7 KiB
HTML
<HTML
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>SG_GET_NUM_WAITING</TITLE
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
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"><LINK
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REL="HOME"
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TITLE="The Linux SCSI Generic (sg) HOWTO"
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HREF="index.html"><LINK
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TITLE="Ioctl()s"
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TITLE="SG_NEXT_CMD_LEN"
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TITLE="SG_SET_FORCE_PACK_ID"
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>The Linux SCSI Generic (sg) HOWTO</TH
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WIDTH="10%"
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>Prev</A
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>Chapter 8. Ioctl()s</TD
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CLASS="SECT1"
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><H1
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><A
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NAME="G_NUMW">8.10. SG_GET_NUM_WAITING</H1
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><DIV
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CLASS="FORMALPARA"
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><P
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><B
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>SG_GET_NUM_WAITING 0x227d. </B
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>Assumes 3rd argument points to an int and places the number of packets
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waiting to be read in it. Only those requests that have been issued by
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a write() and are now available to be read() are counted. In other words
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any ioctl(SG_IO) operations underway on this file descriptor will not
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effect this count
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<A
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NAME="AEN572"
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HREF="#FTN.AEN572"
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>[1]</A
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>.</P
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></DIV
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></DIV
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><H3
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CLASS="FOOTNOTES"
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>Notes</H3
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NAME="FTN.AEN572"
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HREF="g_numw.html#AEN572"
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>[1]</A
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ALIGN="LEFT"
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WIDTH="95%"
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><P
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>If ioctl(SG_SET_KEEP_ORPHAN) is set to 1 and a ioctl(SG_IO) operation
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is interrupted (e.g. by control-C by the user) then when the response
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arrives then the "num_waiting" will be incremented to indicate a
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read() can now pick up the response. </P
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></TD
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>Prev</A
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>Next</A
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>SG_NEXT_CMD_LEN</TD
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WIDTH="34%"
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>SG_SET_FORCE_PACK_ID</TD
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> |