Date: Mon, 24 Mar 2003 12:12:26 -0800 (PST) From: Archie Cobbs <archie@precisionio.com> To: FreeBSD-gnats-submit@FreeBSD.org Subject: bin/50260: can't get my own policy from sched_getscheduler() Message-ID: <200303242012.h2OKCQFX075159@bubba.precisionio.com>
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>Number: 50260 >Category: bin >Synopsis: can't get my own policy from sched_getscheduler() >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon Mar 24 15:50:11 PST 2003 >Closed-Date: >Last-Modified: >Originator: Archie Cobbs >Release: FreeBSD 4.7-STABLE i386 >Organization: Packet Design >Environment: System: FreeBSD bubba.precisionio.com 4.7-STABLE FreeBSD 4.7-STABLE #0: Tue Feb 18 09:50:02 PST 2003 archie@bubba.packetdesign.com:/usr/obj/usr/src/sys/BUBBA i386 >Description: sched_getscheduler(0) returns EPERM. Why can't a process get it's own scheduling policy?? SUSv2 seems to state explicitly that it should be able to: > If a process specified by pid exists and if the calling process has > permission, the scheduling policy will be returned for the process > whose process ID is equal to pid. > > If pid is zero, the scheduling policy will be returned for the > calling process. Ref: http://www.opengroup.org/onlinepubs/7908799/xsh/sched_getscheduler.html >How-To-Repeat: #include <stdio.h> #include <stdlib.h> #include <pthread.h> #include <sched.h> #include <err.h> int main(int ac, char **av) { int policy; int min_prio; int max_prio; if ((policy = sched_getscheduler(0)) == -1) err(1, "sched_getscheduler"); printf("policy = %d\n", policy); if ((min_prio = sched_get_priority_min(policy)) == -1) err(1, "sched_get_priority_min"); if ((max_prio = sched_get_priority_max(policy)) == -1) err(1, "sched_get_priority_max"); printf("max = %d\n", max_prio); printf("min = %d\n", min_prio); return 0; } >Fix: >Release-Note: >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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