Date: Thu, 16 May 1996 00:26:05 +0200 From: Bertrand Petit <elrond@memo.frmug.fr.net> To: freebsd-bugs@freebsd.org Cc: roberto@keltia.freenix.fr Subject: Bug found in getrlimit for 2.1R Message-ID: <199605152226.AAA18328@memo.frmug.fr.net>
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I've found a bug in the getrlinit function(). Here is a small
program to demonstrate this:
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#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
int main()
{
struct rlimit Lim;
if(getrlimit(RLIMIT_NOFILE,&Lim))
{
printf("getrlimit() failes (%s).",strerror(errno));
}
else
{
printf("soft=%d\nhard=%d\n",(long)Lim.rlim_cur,Lim.rlim_max);
fflush(stdout);
}
return(0);
}
-----
This program outputs:
-----
soft=64
hard=-1
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And under gdb:
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Breakpoint 1, main () at toto.c:12
(gdb) print Lim
$1 = {rlim_cur = 0x0000000000000040, rlim_max = 0x7fffffffffffffff}
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I've searched the getrlinit source code:
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memo$ nm /usr/lib/libc.a | grep getrlimit
U _getrlimit
getrlimit.o:
00000008 T _getrlimit
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But was unable to find it on my installation nor the second CD
of 2.1R!
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memo$ find /usr/src -name getrlimit.c
memo$ find /cdiso/usr/src -name getrlimit.c
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I discovered this but while wriing a program working hard with
sockets:
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getrlimit(RLINIT_NOFILE) returned garbage for rlim_max!!!
Using arbitrary hard limit.
At most 255 file descriptors can be created
of wich 60 are still free for sockets.
-----
The reactions of this programs leads ne to this that there is
also a bug in select(), more on that later when I've found what going
on.
Thanks.
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