Date: Thu, 22 Jul 2004 13:47:53 +0200 From: Sascha Schneider <suntsu@suntsu.org> To: FreeBSD-gnats-submit@FreeBSD.org Subject: docs/69428: [patch] Wrong symbolic constant in getrusage(2) on 4.10-STABLE Message-ID: <E1Bnc3F-000OmW-MD@ws111.noc.celox.de> Resent-Message-ID: <200407221150.i6MBoPwb016126@freefall.freebsd.org>
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>Number: 69428
>Category: docs
>Synopsis: [patch] Wrong symbolic constant in getrusage(2) on 4.10-STABLE
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-doc
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: doc-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Jul 22 11:50:25 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator: Sascha Schneider
>Release: FreeBSD 4.10-STABLE i386
>Organization:
>Environment:
System: FreeBSD ws111.noc.celox.de 4.10-STABLE FreeBSD 4.10-STABLE #0: Mon Jul 5 15:45:06 CEST 2004 root@ws111.noc.celox.de:/usr/obj/usr/src/sys/WS111 i386
$FreeBSD: src/lib/libc/sys/getrusage.2,v 1.10.2.5 2001/12/14 18:34:00 ru Exp $
$FreeBSD: src/lib/libc/gen/sysconf.3,v 1.8.2.6 2001/12/14 18:33:51 ru Exp $
$FreeBSD: src/sys/sys/unistd.h,v 1.22.2.3 2003/11/11 07:26:33 das Exp $
>Description:
getrusage(2) states that sysconf(_SC_CLOCK_TCK) would return the
frequency of the statistic clock. According to sysconf(3) and
/usr/include/sys/unistd.h this is wrong:
sysconf(_SC_CLK_TCK) is the way to do it.
>How-To-Repeat:
[user@ws111] [~]$ zgrep TCK /usr/share/man/man2/getrusage.2.gz
.Fn sysconf _SC_CLOCK_TCK
[user@ws111] [~]$ zgrep TCK /usr/share/man/man3/sysconf.3.gz
.It Li _SC_CLK_TCK
[user@ws111] [~]$ zgrep TCK /usr/include/sys/unistd.h
#define _SC_CLK_TCK
[user@ws111] [~dc/stuff]$ cat getrusage-wrong.c
#include <stdio.h>
#include <unistd.h>
int main(void)
{
printf("Frequency: %d\n", sysconf(_SC_CLOCK_TCK));
}
[user@ws111] [~dc/stuff]$ make getrusage-wrong
cc -O -pipe -march=pentium getrusage-wrong.c -o getrusage-wrong
getrusage-wrong.c: In function `main':
getrusage-wrong.c:6: `_SC_CLOCK_TCK' undeclared (first use in this function)
getrusage-wrong.c:6: (Each undeclared identifier is reported only once
getrusage-wrong.c:6: for each function it appears in.)
*** Error code 1
Stop in /home/user/development/c/stuff.
[user@ws111] [~dc/stuff]$ cat getrusage-right.c
#include <stdio.h>
#include <unistd.h>
int main(void)
{
printf("Frequency: %d\n", sysconf(_SC_CLK_TCK));
}
[user@ws111] [~dc/stuff]$ make getrusage-right
cc -O -pipe -march=pentium getrusage-right.c -o getrusage-right
[user@ws111] [~dc/stuff]$ ./getrusage-right
Frequency: 128
>Fix:
patch patch-getrusage.2 attached.
>Release-Note:
>Audit-Trail:
>Unformatted:
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