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sched_getscheduler(3p) — Linux manual page

SCHED_GETSCHEDULER(3P)  POSIX Programmer's ManualSCHED_GETSCHEDULER(3P)

PROLOG        top

       This manual page is part of the POSIX Programmer's Manual.  The       Linux implementation of this interface may differ (consult the       corresponding Linux manual page for details of Linux behavior), or       the interface may not be implemented on Linux.

NAME        top

       sched_getscheduler — get scheduling policy (REALTIME)

SYNOPSIS        top

       #include <sched.h>       int sched_getscheduler(pid_tpid);

DESCRIPTION        top

       Thesched_getscheduler() function shall return the scheduling       policy of the process specified bypid.  If the value ofpid is       negative, the behavior of thesched_getscheduler() function is       unspecified.       The values that can be returned bysched_getscheduler() are       defined in the<sched.h> header.       If a process specified bypid exists, and if the calling process       has permission, the scheduling policy shall be returned for the       process whose process ID is equal topid.       Ifpid is zero, the scheduling policy shall be returned for the       calling process.

RETURN VALUE        top

       Upon successful completion, thesched_getscheduler() function       shall return the scheduling policy of the specified process.  If       unsuccessful, the function shall return -1 and seterrno to       indicate the error.

ERRORS        top

       Thesched_getscheduler() function shall fail if:EPERMThe requesting process does not have permission to              determine the scheduling policy of the specified process.ESRCHNo process can be found corresponding to that specified bypid.The following sections are informative.

EXAMPLES        top

       None.

APPLICATION USAGE        top

       None.

RATIONALE        top

       None.

FUTURE DIRECTIONS        top

       None.

SEE ALSO        top

sched_getparam(3p),sched_setparam(3p),sched_setscheduler(3p)       The Base Definitions volume of POSIX.1‐2017,sched.h(0p)

COPYRIGHT        top

       Portions of this text are reprinted and reproduced in electronic       form from IEEE Std 1003.1-2017, Standard for Information       Technology -- Portable Operating System Interface (POSIX), The       Open Group Base Specifications Issue 7, 2018 Edition, Copyright       (C) 2018 by the Institute of Electrical and Electronics Engineers,       Inc and The Open Group.  In the event of any discrepancy between       this version and the original IEEE and The Open Group Standard,       the original IEEE and The Open Group Standard is the referee       document. The original Standard can be obtained online athttp://www.opengroup.org/unix/online.html .       Any typographical or formatting errors that appear in this page       are most likely to have been introduced during the conversion of       the source files to man page format. To report such errors, seehttps://www.kernel.org/doc/man-pages/reporting_bugs.html .IEEE/The Open Group                2017SCHED_GETSCHEDULER(3P)

Pages that refer to this page:sched.h(0p), pthread_getschedparam(3p), sched_getparam(3p), sched_get_priority_max(3p), sched_rr_get_interval(3p), sched_setparam(3p), sched_setscheduler(3p)

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