Retrieves individual network interface usage statistics.
Perfstat Library (libperfstat.a)
#include <libperfstat.h>
The perfstat_netinterface subroutine retrieves one or more individual network interface usage statistics. The same function can also be used to retrieve the number of available sets of network interface statistics.
To get one or more sets of network interface usage metrics, set the name parameter to the name of the first network interface for which statistics are desired, and set the desired_number parameter. To start from the first network interface, specify "" as the name. The userbuff parameter must always point to a memory area big enough to contain the desired number of perfstat_netinterface_t structures that will be copied by this function. Upon return, the name parameter will be set to either the name of the next network interface, or to "" after all structures have been copied.
To retrieve the number of available sets of network interface usage metrics, set the name and userbuff parameters to NULL, and desired_number to 0 (zero). The returned value will be the number of available sets.
Unless the function is used to retrieve the number of available structures, the number of structures filled is returned upon successful completion. Otherwise, a value of -1 is returned and the errno variable is set.
The perfstat_netinterface subroutine is unsuccessful if one of
the following is true:
| EINVAL | One of the parameters is not valid. |
| EFAULT | Not enough memory. |
| ENOMEM | The string default length is too short. |
| ENOMSG | Cannot access the dictionary. |
The perfstat_netinterface subroutine is part of the Base Operating System (BOS) runtime.
/usr/include/libperfstat.h Defines standard macros, data types, and subroutines.
The perfstat_cpu subroutine, perfstat_cpu_total subroutine, perfstat_memory_total subroutine, perfstat_disk_total subroutine, and perfstat_netinterface_total subroutine.