Date: Fri, 29 Oct 1999 17:20:33 -0400 (EDT) From: aa8vb@ipass.net To: FreeBSD-gnats-submit@freebsd.org Subject: kern/14602: struct utsname fields are allocated too small Message-ID: <199910292120.RAA01742@stealth.ipass.net.>
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>Number: 14602
>Category: kern
>Synopsis: struct utsname fields are allocated too small
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Fri Oct 29 14:20:00 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator: Randall Hopper
>Release: FreeBSD 3.2-RELEASE i386
>Organization:
self
>Environment:
Stock 3.2-RELEASE
>Description:
The version string for FreeBSD is much longer than 32 characters:
> uname -v
FreeBSD 3.2-RELEASE #0: Mon Jun 28 16:45:38 EDT 1999
rhh@stealth:/32_share/os/3.2/usr/src/sys/compile/WINCAST
but this can't be queried via uname() by cross-platform utilities,
because of a small length definition in utsname.h:
/usr/include/sys/utsname.h:
#define SYS_NMLN 32
struct utsname {
...
char version[SYS_NMLN]; /* Version level. */
};
FWIW, on SGI IRIX:
/usr/include/sys/utsname.h:
#define _SYS_NMLN 257 /* 4.0 size of utsname elements.*/
/* Must be at least 257 to */
/* support Internet hostnames. */
struct utsname {
char sysname[_SYS_NMLN];
char nodename[_SYS_NMLN];
char release[_SYS_NMLN];
char version[_SYS_NMLN];
>How-To-Repeat:
Query the FreeBSD version via uname(3) and observe the truncation.
>Fix:
Please expand sys/utsname.h's SYS_NMLN to around 256.
Thanks.
>Release-Note:
>Audit-Trail:
>Unformatted:
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