kstat_read(3KSTAT)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | FILES | ATTRIBUTES | SEE ALSO

NAME

kstat_read, kstat_write– read or write kstat data

SYNOPSIS

cc [ flag … ] file … -lkstat [ library … ]
#include <kstat.h>

kid_t kstat_read(kstat_ctl_t *kc, kstat_t *ksp, void *buf);
kid_t kstat_write(kstat_ctl_t *kc, kstat_t *ksp, void *buf);

DESCRIPTION

The kstat_read() function gets data from the kernel for the kstat pointed to by ksp. ksp->ks_data is automatically allocated (or reallocated) to be large enough to hold all of the data. ksp->ks_ndata is set to the number of data fields, ksp->ks_data_size is set to the total size of the data, and ksp->ks_snaptime is set to the high-resolution time at which the data snapshot was taken. If buf is non-NULL, the data is copied from ksp->ks_data into buf.

The kstat_write() function writes data from buf, or from ksp->ks_data if buf is NULL, to the corresponding kstat in the kernel. Only the superuser can use kstat_write().

RETURN VALUES

On success, kstat_read() and kstat_write() return the current kstat chain ID (KCID). On failure, they return -1.

FILES

/dev/kstat

kernel statistics driver

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
MT-Level	Unsafe

SEE ALSO

kstat(3KSTAT), kstat_chain_update(3KSTAT), kstat_close(3KSTAT), kstat_data_lookup(3KSTAT), kstat_lookup(3KSTAT), kstat_open(3KSTAT), attributes(5)

SunOS 5.9  Last Revised 27 Jun 2000

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | FILES | ATTRIBUTES | SEE ALSO