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Date: Fri, 29 Oct 1999 17:20:33 -0400 (EDT)
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To: FreeBSD-gnats-submit@freebsd.org
Subject: struct utsname fields are allocated too small
X-Send-Pr-Version: 3.2

>Number:         14602
>Category:       kern
>Synopsis:       struct utsname fields are allocated too small
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Fri Oct 29 14:20:00 PDT 1999
>Closed-Date:    Wed Aug 21 12:25:53 PDT 2002
>Last-Modified:  Wed Aug 21 12:25:53 PDT 2002
>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:
State-Changed-From-To: open->closed 
State-Changed-By: johan 
State-Changed-When: Wed Aug 21 12:24:22 PDT 2002 
State-Changed-Why:  
Duplicate of PR 4688, which was closed after 
SYS_NMLN was increased to 256. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=14602 
>Unformatted:
