Content-type: text/html Man page of adjmsg

adjmsg

Section: Kernel Functions for Drivers (9F)
Updated: 16 Jan 2006
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NAME

adjmsg - trim bytes from a message  

SYNOPSIS

#include <sys/stream.h>

int adjmsg(mblk_t *mp, ssize_t len);  

INTERFACE LEVEL

Architecture independent level 1 (DDI/DKI).  

PARAMETERS

mp Pointer to the message to be trimmed.

len The number of bytes to be removed.

 

DESCRIPTION

The adjmsg() function removes bytes from a message. |len| (the absolute value of len) specifies the number of bytes to be removed. The adjmsg() function only trims bytes across message blocks of the same type.

The adjmsg() function finds the maximal leading sequence of message blocks of the same type as that of mp and starts removing bytes either from the head of that sequence or from the tail of that sequence. If len is greater than 0, adjmsg() removes bytes from the start of the first message block in that sequence. If len is less than 0, it removes bytes from the end of the last message block in that sequence.

The adjmsg() function fails if |len| is greater than the number of bytes in the maximal leading sequence it finds.

The adjmsg() function may remove any except the first zero-length message block created during adjusting. It may also remove any zero-length message blocks that occur within the scope of |len|.  

RETURN VALUES

The adjmsg() function returns:

1 Successful completion.

0 An error occurred.

 

CONTEXT

The adjmsg() function can be called from user, interrupt, or kernel context.  

SEE ALSO

STREAMS Programming Guide


 

Index

NAME
SYNOPSIS
INTERFACE LEVEL
PARAMETERS
DESCRIPTION
RETURN VALUES
CONTEXT
SEE ALSO

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Time: 02:39:44 GMT, October 02, 2010