1POSIX_SPAWNATTR_GETSCHEDPOLIPCOYS(I3XP)Programmer'sPOMSaInXu_aSlPAWNATTR_GETSCHEDPOLICY(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       posix_spawnattr_getschedpolicy,  posix_spawnattr_setschedpolicy  —  get
13       and  set  the  spawn-schedpolicy attribute of a spawn attributes object
14       (ADVANCED REALTIME)
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SYNOPSIS

17       #include <spawn.h>
18       #include <sched.h>
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20       int posix_spawnattr_getschedpolicy(const posix_spawnattr_t
21           *restrict attr, int *restrict schedpolicy);
22       int posix_spawnattr_setschedpolicy(posix_spawnattr_t *attr,
23           int schedpolicy);
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DESCRIPTION

26       The posix_spawnattr_getschedpolicy() function shall obtain the value of
27       the  spawn-schedpolicy  attribute from the attributes object referenced
28       by attr.
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30       The posix_spawnattr_setschedpolicy()  function  shall  set  the  spawn-
31       schedpolicy attribute in an initialized attributes object referenced by
32       attr.
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34       The spawn-schedpolicy attribute represents the scheduling policy to  be
35       assigned   to   the   new  process  image  in  a  spawn  operation  (if
36       POSIX_SPAWN_SETSCHEDULER is set  in  the  spawn-flags  attribute).  The
37       default value of this attribute is unspecified.
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RETURN VALUE

40       Upon   successful  completion,  posix_spawnattr_getschedpolicy()  shall
41       return zero and store the value of the spawn-schedpolicy  attribute  of
42       attr  into  the  object referenced by the schedpolicy parameter; other‐
43       wise, an error number shall be returned to indicate the error.
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45       Upon  successful  completion,  posix_spawnattr_setschedpolicy()   shall
46       return  zero;  otherwise, an error number shall be returned to indicate
47       the error.
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ERRORS

50       These functions may fail if:
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52       EINVAL The value specified by attr is invalid.
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54       The posix_spawnattr_setschedpolicy() function may fail if:
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56       EINVAL The value of the attribute being set is not valid.
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58       The following sections are informative.
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EXAMPLES

61       None.
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APPLICATION USAGE

64       These functions are part of the Spawn and  Process  Scheduling  options
65       and need not be provided on all implementations.
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RATIONALE

68       None.
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FUTURE DIRECTIONS

71       None.
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SEE ALSO

74       posix_spawn(), posix_spawnattr_destroy(), posix_spawnattr_getsigde‐
75       fault(), posix_spawnattr_getflags(), posix_spawnattr_getpgroup(),
76       posix_spawnattr_getschedparam(), posix_spawnattr_getsigmask()
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78       The Base Definitions volume of POSIX.1‐2017, <sched.h>, <spawn.h>
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81       Portions  of  this text are reprinted and reproduced in electronic form
82       from IEEE Std 1003.1-2017, Standard for Information Technology --  Por‐
83       table  Operating System Interface (POSIX), The Open Group Base Specifi‐
84       cations Issue 7, 2018 Edition, Copyright (C) 2018 by the  Institute  of
85       Electrical  and  Electronics Engineers, Inc and The Open Group.  In the
86       event of any discrepancy between this version and the original IEEE and
87       The  Open Group Standard, the original IEEE and The Open Group Standard
88       is the referee document. The original Standard can be  obtained  online
89       at http://www.opengroup.org/unix/online.html .
90
91       Any  typographical  or  formatting  errors that appear in this page are
92       most likely to have been introduced during the conversion of the source
93       files  to  man page format. To report such errors, see https://www.ker‐
94       nel.org/doc/man-pages/reporting_bugs.html .
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98IEEE/The Open Group                  2017   POSIX_SPAWNATTR_GETSCHEDPOLICY(3P)
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