cc [ flag … ] file … -lkstat [ library … ] #include <kstat.h>kid_t kstat_read(kstat_ctl_t *kc, kstat_t *ksp, void *buf);
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().
On success, kstat_read() and kstat_write() return the current kstat chain ID (KCID). On failure, they return -1.
See attributes(5) for descriptions of the following attributes:
|ATTRIBUTE TYPE||ATTRIBUTE VALUE|