sched_getscheduler(2)					 sched_getscheduler(2)

NAME    [Toc]    [Back]

     sched_getscheduler	- get the scheduling policy of a process

C SYNOPSIS    [Toc]    [Back]

     #include <sched.h>

     int sched_getscheduler (pid_t pid<b>);

DESCRIPTION    [Toc]    [Back]

     The sched_getscheduler system call	is used	to get the scheduling policy
     of	the process specified by pid.  If pid is set to	zero, then the
     scheduling	policy of the caller is	returned.

     A process may obtain the scheduling policy	of itself and any process
     sharing the same real user	ID [see	getuid(2)].  To	obtain the scheduling
     policy of an unrelated process, the calling process must have the
     CAP_SCHED_MGT capability [see capability].

     If	pid refers to a	POSIX thread process [see pthreads(3P)]	then this call
     retrieves the scheduling policy that is shared by process scope and bound
     scope threads.

     sched_getscheduler	will fail if one or more of the	following are true:

     [EINVAL]	    The	process	specified by pid is not	executing with a
		    scheduling policy.

     [EPERM]	    The	calling	process	attempted to obtain the	scheduling
		    policy of an unrelated process and the caller does not
		    have the CAP_SCHED_MGT capability.

     [ESRCH]	    The	process	specified by pid does not exist.

SEE ALSO    [Toc]    [Back]

     capability(4), sched_setparam(2), sched_getparam(2),
     sched_setscheduler(2), sched_yield(2), sched_get_priority_max(2),
     sched_get_priority_min(2),	sched_rr_get_interval(2), sproc(2), fork(2),
     getuid(2),	pthreads(5)

DIAGNOSTICS    [Toc]    [Back]

     Upon successful completion, one of	the following scheduling policies is
     returned: SCHED_FIFO, SCHED_RR, SCHED_TS.	These scheduling policies are
     described in sched_setscheduler(2).

     Otherwise,	a value	of -1 is returned and errno is set to indicate the
     error.


									PPPPaaaaggggeeee 1111