Return to getpriority.2 CVS log

Up to [CSRG BSD Unix] / 43BSDTahoe / man / man2

Annotation of 43BSDTahoe/man/man2/getpriority.2, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1980 Regents of the University of California.
        !             2: .\" All rights reserved.  The Berkeley software License Agreement
        !             3: .\" specifies the terms and conditions for redistribution.
        !             4: .\"
        !             5: .\"    @(#)getpriority.2       6.5 (Berkeley) 5/22/86
        !             6: .\"
        !             7: .TH GETPRIORITY 2 "May 22, 1986"
        !             8: .UC 4
        !             9: .SH NAME
        !            10: getpriority, setpriority \- get/set program scheduling priority
        !            11: .SH SYNOPSIS
        !            12: .nf
        !            13: .ft B
        !            14: #include <sys/resource.h>
        !            15: .PP
        !            16: .ft B
        !            17: prio = getpriority(which, who)
        !            18: int prio, which, who;
        !            19: .PP
        !            20: .ft B
        !            21: setpriority(which, who, prio)
        !            22: int which, who, prio;
        !            23: .fi
        !            24: .SH DESCRIPTION
        !            25: The scheduling
        !            26: priority of the process, process group, or user, as indicated by
        !            27: .I which
        !            28: and
        !            29: .I who
        !            30: is obtained with the
        !            31: .I getpriority
        !            32: call and set with the
        !            33: .I setpriority
        !            34: call.
        !            35: .I Which
        !            36: is one of PRIO_PROCESS, PRIO_PGRP, or PRIO_USER, and 
        !            37: .I who
        !            38: is interpreted relative to 
        !            39: .I which
        !            40: (a process identifier for PRIO_PROCESS, process group
        !            41: identifier for PRIO_PGRP, and a user ID for PRIO_USER).
        !            42: A zero value of
        !            43: .I who
        !            44: denotes the current process, process group, or user.
        !            45: .I Prio
        !            46: is a value in the range \-20 to 20.  The default priority is 0;
        !            47: lower priorities cause more favorable scheduling.
        !            48: .PP
        !            49: The
        !            50: .I getpriority
        !            51: call returns the highest priority (lowest numerical value)
        !            52: enjoyed by any of the specified processes.  The
        !            53: .I setpriority
        !            54: call sets the priorities of all of the specified processes
        !            55: to the specified value.  Only the super-user may lower priorities.
        !            56: .SH "RETURN VALUE
        !            57: Since
        !            58: .I getpriority
        !            59: can legitimately return the value \-1, it is necessary
        !            60: to clear the external variable \fIerrno\fP prior to the
        !            61: call, then check it afterward to determine
        !            62: if a \-1 is an error or a legitimate value.
        !            63: The
        !            64: .I setpriority
        !            65: call returns 0 if there is no error, or
        !            66: \-1 if there is.
        !            67: .SH ERRORS
        !            68: .I Getpriority
        !            69: and
        !            70: .I setpriority
        !            71: may return one of the following errors:
        !            72: .TP 15
        !            73: [ESRCH]
        !            74: No process was located using the 
        !            75: .I which
        !            76: and
        !            77: .I who
        !            78: values specified.
        !            79: .TP 15
        !            80: [EINVAL]
        !            81: .I Which
        !            82: was not one of PRIO_PROCESS, PRIO_PGRP, or PRIO_USER.
        !            83: .PP
        !            84: In addition to the errors indicated above,
        !            85: .I setpriority
        !            86: may fail with one of the following errors returned:
        !            87: .TP 15
        !            88: [EPERM]
        !            89: A process was located, but neither its effective nor real user
        !            90: ID matched the effective user ID of the caller.
        !            91: .TP 15
        !            92: [EACCES]
        !            93: A non super-user attempted to lower a process priority.
        !            94: .SH "SEE ALSO"
        !            95: nice(1), fork(2), renice(8)

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.