cfg_attr_t man page on OSF1

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cfg_attr_t(9s)							cfg_attr_t(9s)

NAME
       cfg_attr_t - General: Contains information for managing the loading and
       unloading of kernel modules

SYNOPSIS
       typedef struct cfg_attr {
	 char		   name[CFG_ATTR_NAME_SZ];
	 uchar		   type;
	 uchar		   operation;
	 uint		   status;
	 long		   index;
	 union {
	     struct {
		 caddr_t   val;
		 ulong	   min_size;
		 ulong	   max_size;
		 void	   (*disposal)();
		 ulong	   val_size;
	     } bin;

	     struct {
		 caddr_t   val;
		 ulong	   min_len;
		 ulong	   max_len;
		 void	   (*disposal)();
	     } str;

	     struct {
		 ulong	   val;
		 ulong	   min_val;
		 ulong	   max_val;
	     } num;
	 } attr; } cfg_attr_t;

MEMBERS
       Specifies the ASCII name of the attribute. The name must be  between  2
       and  CFG_ATTR_NAME_SZ  characters  in length, including the terminating
       null character. Do not begin the ASCII name of the attribute  with  the
       Method_	or  Device_ characters.	 The cfgmgr framework reserves certain
       names that begin with the Method_ and  Device_  characters.   Specifies
       the  data  type associated with the name attribute. See the DESCRIPTION
       section for the constants you can pass to the type  member.   Specifies
       the  operations that the cfgmgr framework can perform on the attribute.
       See the DESCRIPTION section for the constants you can pass to the oper‐
       ation  member.	Stores	the  return  code  from operations (configure,
       unconfigure,  query)  that  the	cfgmgr	framework  performs.  See  the
       DESCRIPTION  section  for the operation codes that the cfgmgr framework
       can return to the status member.	 Stores a value that scopes the target
       for  indexed  attributes.   Specifies a union of the possible attribute
       types used for storing values, kernel locations,	 validation  criteria,
       and disposal routines.  The cfgmgr framework uses the appropriate union
       element according to the attribute type.	 For  example,	attributes  of
       type CFG_ATTR_ULONGTYPE use the union element num.

DESCRIPTION
       The  cfg_attr_t	data  structure	 contains information for managing the
       configuring and unconfiguring of kernel modules. The  cfgmgr  framework
       passes  a pointer to this data structure to the kernel module's config‐
       ure routine.  The kernel module can parse  this	structure  pointer  to
       check  the  validity of the values associated with the module's associ‐
       ated sysconfigtab file fragment and the /etc/sysconfigtab database.

       You must set the type member to one of the  following  constants:  Data
       type  is	 a null-terminated array of characters.	 Data type is a 32-bit
       signed integer.	Data type is a 32-bit unsigned integer.	 Data type  is
       a 64-bit signed integer.	 Data type is a 64-bit unsigned integer.  Data
       type is an array of bytes.  Data type is an 8-bit  unsigned  character.
       Data type is a 16-bit unsigned short integer.

       You can set the operation member to one of the following constants: The
       cfgmgr framework configures  the	 attribute.   This  means  the	cfgmgr
       framework  obtains a data value for the attribute from the /etc/syscon‐
       figtab database. The configure operation occurs when the cfgmgr	frame‐
       work  calls  the configure routine at its CFG_OP_CONFIGURE entry point.
       (That is, the optype argument of the configure routine evaluates to the
       CFG_OP_CONFIGURE	 constant.)   The cfgmgr framework queries (reads) the
       attribute. This means the kernel	 module	 cooperates  with  the	cfgmgr
       framework  to  provide  the  value  associated  with the attribute as a
       result of user-initiated query requests. These requests	are  typically
       the result of the sysconfig -q command. The query operation occurs when
       the cfgmgr framework calls the configure routine	 at  its  CFG_OP_QUERY
       entry  point.  (That  is,  the optype argument of the configure routine
       evaluates to the CFG_OP_QUERY constant.)	 The cfgmgr  framework	recon‐
       figures	the  attribute.	  This means the cfgmgr framework reconfigures
       the data value for the attribute.  This functionality allows a user  to
       modify the attribute.  A reconfigure request is typically the result of
       the sysconfig -r command. The reconfigure  operation  occurs  when  the
       cfgmgr  framework calls the configure routine at its CFG_OP_RECONFIGURE
       entry point. (That is, the optype argument  of  the  configure  routine
       evaluates to the CFG_OP_RECONFIGURE constant.)

       The  cfgmgr  framework can return one of the following operation codes:
       Successful operation.  The attribute you specified in the  name	member
       does  not  exist.   The attribute you specified in the name member does
       not support the operation.  The subsystem failed.  The value or size of
       the attribute you specified in the name member is too small.  The value
       or size of the attribute you specified in the name member is too large.
       The data type that you specified for the attribute you specified in the
       name member is invalid or is a mismatch.	 The index associated with the
       attribute that you specified in the name member is invalid.  The cfgmgr
       framework could not allocate memory for the specified  attribute.   The
       attribute  that you specified in the name member cannot be converted to
       a number.

FILES
SEE ALSO
       Data Structures: cfg_subsys_attr_t(9s)

								cfg_attr_t(9s)
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