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From: Xin LI <delphij@FreeBSD.org>
Date: Wed, 14 Apr 2010 22:02:19 +0000 (UTC)
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Subject: cvs commit: src/sbin/ifconfig ifconfig.c src/share/man/man4
 netintro.4 src/sys/net if.c
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delphij     2010-04-14 22:02:19 UTC

  FreeBSD src repository

  Modified files:
    sbin/ifconfig        ifconfig.c 
    share/man/man4       netintro.4 
    sys/net              if.c 
  Log:
  SVN rev 206637 on 2010-04-14 22:02:19Z by delphij
  
  When an underlying ioctl(2) handler returns an error, our ioctl(2)
  interface considers that it hits a fatal error, and will not copyout
  the request structure back for _IOW and _IOWR ioctls, keeping them
  untouched.
  
  The previous implementation of the SIOCGIFDESCR ioctl intends to
  feed the buffer length back to userland.  However, if we return
  an error, the feedback would be defeated and ifconfig(8) would
  trap into an infinite loop.
  
  This commit changes SIOCGIFDESCR to set buffer field to NULL to
  indicate the previous ENAMETOOLONG case.
  
  Reported by:    bschmidt
  MFC after:      2 weeks
  
  Revision  Changes    Path
  1.153     +12 -11    src/sbin/ifconfig/ifconfig.c
  1.29      +6 -3      src/share/man/man4/netintro.4
  1.381     +3 -4      src/sys/net/if.c