1SCHED_GETPARAM(3P)         POSIX Programmer's Manual        SCHED_GETPARAM(3P)
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PROLOG

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

12       sched_getparam — get scheduling parameters (REALTIME)
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SYNOPSIS

15       #include <sched.h>
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17       int sched_getparam(pid_t pid, struct sched_param *param);
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DESCRIPTION

20       The sched_getparam() function shall return the scheduling parameters of
21       a  process  specified by pid in the sched_param structure pointed to by
22       param.
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24       If a process specified by pid exists, and if the  calling  process  has
25       permission,  the scheduling parameters for the process whose process ID
26       is equal to pid shall be returned.
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28       If pid is zero, the scheduling parameters for the calling process shall
29       be  returned. The behavior of the sched_getparam() function is unspeci‐
30       fied if the value of pid is negative.
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RETURN VALUE

33       Upon successful completion, the sched_getparam() function shall  return
34       zero.  If  the  call  to sched_getparam() is unsuccessful, the function
35       shall return a value of -1 and set errno to indicate the error.
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ERRORS

38       The sched_getparam() function shall fail if:
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40       EPERM  The requesting process does not have permission  to  obtain  the
41              scheduling parameters of the specified process.
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43       ESRCH  No process can be found corresponding to that specified by pid.
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45       The following sections are informative.
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EXAMPLES

48       None.
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APPLICATION USAGE

51       None.
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RATIONALE

54       None.
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FUTURE DIRECTIONS

57       None.
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SEE ALSO

60       sched_getscheduler(), sched_setparam(), sched_setscheduler()
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62       The Base Definitions volume of POSIX.1‐2017, <sched.h>
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65       Portions  of  this text are reprinted and reproduced in electronic form
66       from IEEE Std 1003.1-2017, Standard for Information Technology --  Por‐
67       table  Operating System Interface (POSIX), The Open Group Base Specifi‐
68       cations Issue 7, 2018 Edition, Copyright (C) 2018 by the  Institute  of
69       Electrical  and  Electronics Engineers, Inc and The Open Group.  In the
70       event of any discrepancy between this version and the original IEEE and
71       The  Open Group Standard, the original IEEE and The Open Group Standard
72       is the referee document. The original Standard can be  obtained  online
73       at http://www.opengroup.org/unix/online.html .
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75       Any  typographical  or  formatting  errors that appear in this page are
76       most likely to have been introduced during the conversion of the source
77       files  to  man page format. To report such errors, see https://www.ker‐
78       nel.org/doc/man-pages/reporting_bugs.html .
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82IEEE/The Open Group                  2017                   SCHED_GETPARAM(3P)
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