KSTAT_OPEN(3KSTAT) Kernel Statistics Library Functions KSTAT_OPEN(3KSTAT)

kstat_open, kstat_close
initialize kernel statistics facility

Kernel Statistics Library (libkstat, -lkstat)

#include <kstat.h>

kstat_ctl_t *
kstat_open(void);

int
kstat_close(kstat_ctl_t *kc);

The kstat_open() function initializes a kstat control structure that provides access to the kernel statistics library. It returns a pointer to this structure, which must be supplied as the kc argument in subsequent libkstat function calls.

The kstat_close() function frees all resources that were associated with kc. This is performed automatically on exit(2) and execve(2).

Upon successful completion, kstat_open() returns a pointer to a kstat control structure. Otherwise, it returns NULL, no resources are allocated, and errno is set to indicate the error.

Upon successful completion, kstat_close() returns 0. Otherwise, -1 is returned and errno is set to indicate the error.

/dev/kstat
kernel statistics driver character device

The kstat_open() function will fail if:
Insufficient storage space is available.
The kstat was temporarily unavailable for reading or writing.
The given kstat could not be located for reading.
The data for the given kstat was too large to be stored in the structure.

The kstat_open() function can also return the error values for open(2).

The kstat_close() function can also return the error values for close(2).

Committed

Unsafe

close(2), execve(2), exit(2), open(2), kstat(3KSTAT), kstat_chain_update(3KSTAT), kstat_lookup(3KSTAT), kstat_read(3KSTAT), attributes(7)
November 29, 2021 OmniOS