The extended accounting API contains functions that perform the following:
exacct system calls
Operations on the exacct file
Operations on exacct objects
Miscellaneous Operations
|
|
|
The following table lists the system calls that interact with the extended accounting subsystem.
Table 3–1 Extended Accounting System Calls
Function |
Description |
---|---|
Provides privileged processes with the ability to tag accounting records with additional data that is specific to the process |
|
Enables privileged processes to request extended accounting buffers from the kernel for currently executing tasks and processes |
|
Requests the kernel to write resource usage data for a specified task or process |
These functions provide access to the exacct files:
Table 3–2 exacct File Functions
Function |
Description |
---|---|
Opens an exacct file. |
|
Closes an exacct file. |
|
First time use on a group of objects reads data into an ea_object_t structure. Subsequent use on the group cycles through the objects in the group. |
|
Appends the specified object to the open exacct file. |
|
Reads the basic fields (eo_catalog and eo_type) into an ea_object_t structure and rewinds to the head of the record. |
|
Skips back one object in the exacct file and reads the basic fields (eo_catalog and eo_type) into an ea_object_t. |
|
Gets the name of the host on which the exacct file was created. |
|
Determines the creator of the exacct file. |
These functions are used to access exacct objects:
Table 3–3 exacct Object Functions
Function |
Description |
---|---|
Assigns an exacct object and sets the value(s). |
|
Sets the values of a group of exacct objects. |
|
Checks an exacct object's mask to see if that object has a specific catalog tag. |
|
Attaches an exacct object to a specified exacct object. |
|
Attaches a chain of exacct objects as member items of a specified group. |
|
Frees the value fields in the specified exacct object. |
|
Frees the specified exacct object and any attached hierarchies of objects. |
The following table lists the functions associated with extended accounting memory management. The function name is a link to its man page.
Table 3–4 Extended Accounting Memory Management Functions
Link to man page |
Description |
---|---|
Converts an exacct object from unpacked (in-memory) representation to packed (in-file) representation. |
|
Converts an exacct object from packed (in-file) representation to unpacked (in-memory) representation. |
|
Duplicates a string that is to be stored inside an ea_object_t structure. |
|
Frees a string previously copied by ea_strdup(). |
|
Allocates a block of memory of the requested size. This block can be safely passed to libexacct functions, and can be safely freed by any of the ea_free functions. |
|
Frees a block of memory previously allocated by ea_alloc(). |
|
Frees variable-length data in object hierarchy. |
|
Frees value fields of designated object, if EUP_ALLOC is specified. The object is not freed. ea_free_object() frees the specified object and any attached hierarchy of objects. If the flag argument is set to EUP_ALLOC, ea_free_object() also frees any variable-length data in the object hierarchy. If the flag argument is set to EUP_NOALLOC, ea_free_object() does not free the variable-length data. In particular, these flags should correspond to the flags specified in calls to ea_unpack_object(3EXACCT). |
|
Copies an ea_object_t. If the source object is part of a chain, only the current object is copied. If the source object is a group, only the group object is copied without its list of members. The group object eg_nobjs and eg_objs fields are set to 0 and NULL respectively. Use ea_copy_tree() to copy recursively a group or a list of items. |
|
ea_copy_object_tree recursively copies an ea_object_t. All elements in the eo_next list are copied. Any group objects are recursively copied. The returned object can be completely freed with ea_free_object(3EXACCT) by specifying the EUP_ALLOC flag. |
|
Reads in nobj top-level objects from the file, returning the same data structure that would have originally been passed to ea_write_object(). On encountering a group object,ea_get_object() reads only the group header part of the group. ea_get_object_tree() reads the group and all its member items, recursing into subrecords if necessary. The returned object data structure can be completely freed with ea_free_object() by specifying the EUP_ALLOC flag. |
These functions are associated with miscellaneous operations: