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kstat_close(3kstat) [opensolaris man page]

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

NAME
kstat_open, kstat_close - initialize kernel statistics facility SYNOPSIS
cc[ flag... ] file... -lkstat [ library...] #include <kstat.h> kstat_ctl_t *kstat_open(void); int kstat_close(kstat_ctl_t *kc); DESCRIPTION
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). RETURN VALUES
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. ERRORS
The kstat_open() function will fail if: ENOMEM Insufficient storage space is available. EAGAIN The kstat was temporarily unavailable for reading or writing. ENXIO The given kstat could not be located for reading. EOVERFLOW 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). FILES
/dev/kstat kernel statistics driver ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Stable | +-----------------------------+-----------------------------+ |MT-Level |Unsafe | +-----------------------------+-----------------------------+ SEE ALSO
close(2), execve(2), open(2), exit(2), kstat(3KSTAT), kstat_chain_update(3KSTAT), kstat_lookup(3KSTAT), kstat_read(3KSTAT), attributes(5) SunOS 5.11 3 Aug 2004 kstat_open(3KSTAT)

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

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. The ksp->ks_data field is automatically allocated (or reallocated) to be large enough to hold all of the data. The ksp->ks_ndata field 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 to 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
Upon successful completion, kstat_read() and kstat_write() return the current kstat chain ID (KCID). Otherwise, they return -1 and set errno to indicate the error. ERRORS
The kstat_read() and kstat_write() functions will fail if: EACCES An attempt was made to write to a non-writable kstat. EAGAIN The kstat was temporarily unavailable for reading or writing. EINVAL An attempt was made to write data to a kstat, but the number of elements or the data size does not match. ENOMEM Insufficient storage space is available. ENXIO The given kstat could not be located for reading or writing. EOVERFLOW The data for the given kstat was too large to be stored in the structure. EPERM An attempt was made to write to a kstat, but {PRIV_SYS_CONFIG} was not asserted in the effective privilege set. FILES
/dev/kstat kernel statistics driver ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Stable | +-----------------------------+-----------------------------+ |MT-Level |Unsafe | +-----------------------------+-----------------------------+ SEE ALSO
kstat(3KSTAT), kstat_chain_update(3KSTAT), kstat_lookup(3KSTAT), kstat_open(3KSTAT), attributes(5), privileges(5) SunOS 5.11 3 Aug 2004 kstat_read(3KSTAT)
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