src/lib/libutil/gr_util.c, branch release/8.2.0_cvs

Copy releng/8.2 to release/8.2.0 for 8.2-RELEASE.

2011-02-16T16:18:46+00:00

Approved by:	re (implicit)

This commit was manufactured to restore the state of the 8.2-RELEASE image.

Merge from head to stable/8:

2009-12-18T20:05:10+00:00

r200423:
Remove a dead store.

Fixed style issues with variable ordering and naming, spacing and

2008-11-23T23:26:12+00:00

parentheses.

Fixed alignment issue in gr_dup() in its assignment of gr_mem using a
struct to force alignment without performing alignment mathematics.  This
was noticed recently with libutil was built with WARNS=6 on platform such
as sparc64.

Added checks to gr_dup(), gr_equal() and gr_make() to prevent segfaults
when examining struct group's with the struct members pointing to NULL's.

With fix of alignment issue, restore WARNS?=6.

Reviewed by:	des
MFC after:	1 week

style(9) fixes.

2008-11-11T00:32:55+00:00

MFC after:	1 week

Add four utility functions related to struct grp processing modeled in-part

2008-04-23T00:49:13+00:00

after similar calls related to struct pwd in libutil/pw_util.c:
  - gr_equal()
    Perform a deep comparison of two struct grp's.  It does a thorough, yet
    unoptimized comparison of all the members regardless of order.

  - gr_make()
    Create a string (see group(5)) from a struct grp.

  - gr_dup()
    Duplicate a struct grp.  Returns a value that is a single contiguous
    block of memory.

  - gr_scan()
    Create a struct grp from a string (as produced by gr_make()).

MFC after:	3 weeks