Bug 14602

Summary: struct utsname fields are allocated too small
Product: Base System Reporter: Randall Hopper <aa8vb>
Component: kernAssignee: freebsd-bugs (Nobody) <bugs>
Status: Closed FIXED    
Severity: Affects Only Me    
Priority: Normal    
Version: 3.2-RELEASE   
Hardware: Any   
OS: Any   

Description Randall Hopper 1999-10-29 22:20:00 UTC 
         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];

Fix: 

Please expand sys/utsname.h's SYS_NMLN to around 256.

        Thanks.
How-To-Repeat: 
	Query the FreeBSD version via uname(3) and observe the truncation.
Comment 1 Johan Karlsson freebsd_committer freebsd_triage 2002-08-21 20:24:22 UTC 
State Changed
From-To: open->closed

Duplicate of PR 4688, which was closed after 
SYS_NMLN was increased to 256.