cpusetGetPIDList(3x)                                      cpusetGetPIDList(3x)


NAME
     cpusetGetPIDList - get a list of all PIDs attached to a cpuset

SYNOPSIS
     #include <cpuset.h>

     cpuset_PIDList_t *cpusetGetPIDList(char *qname);

DESCRIPTION
     The cpusetGetPIDList function is used to obtain a list of the PIDs for
     all processes currently attached to the specified cpuset. Only processes
     with a user ID or group ID that has read permissions on the permissions
     file can successfully execute this function.

     The qname argument is the name of the cpuset to which the current process
     should be attached.

     The function returns a pointer to a structure of type cpuset_PIDList_t
     (defined in <cpuset.h>).  The function cpusetGetPIDList allocates the
     memory for the structure and the user is responsible for freeing the
     memory using the function cpusetFreePIDList(3x).  The cpuset_PIDList_t
     structure looks similar to this:

               typedef struct {
                   int    count;
                   pid_t  *list;
               } cpuset_PIDList_t;


     count is the number of PID values in the list.  list references an array
     that holds the list of PID values.  The memory for list is allocated when
     the cpuset_PIDList_t is allocated and it is released when the
     cpuset_PIDList_t structure is released.

EXAMPLES
     This example obtains the list of PIDs attached to the cpuset mpi_set and
     prints out the PID values.

               char             *qname = "mpi_set";
               cpuset_PIDList_t *pids;

               /* Get the list of PIDs else print error & exit */
               if ( !(pids = cpusetGetPIDList(qname)) ) {
                   perror("cpusetGetPIDList");
                   exit(1);
               }
               if (pids->count == 0) {
                   printf("CPUSET[%s] has 0 processes attached\n",
                           qname);
               } else {
                   int i;


                   printf("CPUSET[%s] attached PIDs:\n",
                           qname);
                       for (i = 0; i < pids->count; i++)
                           printf("PID[%d]0, pids->list[i]);
               }
               cpusetFreePIDList(pids);


NOTES
     cpusetGetPIDList is found in the library "libcpuset.so", and will be
     loaded if the option -lcpuset is used with cc(1) or ld(1).

SEE ALSO
     cpuset(1), cpusetFreePIDList(3x), cpuset(5).

DIAGNOSTICS
     If successful, cpusetGetPIDList returns a pointer to a cpuset_PIDList_t
     structure.  If cpusetGetPIDList fails, it returns NULL and errno is set
     to indicate the error.  The possible values for errno are the same as the
     values set by sysmp(2) and sbrk(2).


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