Architecture independent level 1 (DDI/DKI).

mp

Pointer to the message whose blocks are to be concatenated.

len

Number of bytes to concatenate.

msgpullup() concatenates and aligns the first len data bytes of the message pointed to by mp, copying the data into a new message. Any remaining bytes in the remaining message blocks will be copied and linked onto the new message. The original message is unaltered. If len equals -1, all data are concatenated. If len bytes of the same message type cannot be found, msgpullup() fails and returns NULL.

msgpullup returns the following values:

Non-null

Successful completion. A pointer to the new message is returned.

NULL

An error occurred.

msgpullup() can be called from user or interrupt context.

srv(9E), allocb(9F), pullupmsg(9F), msgb(9S)

Writing Device Drivers

STREAMS Programming Guide

msgpullup() is a DKI-compliant replacement for the older pullupmsg(9F) routine. Users are strongly encouraged to use msgpullup() instead of pullupmsg(9F).