kc3-lang/gnulib/doc/glibc-functions/explicit_bzero.texi

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• Hash : 276416a1
  Author :
  Date : 2017-07-16T07:26:16
  

  explicit_bzero: new module
  
  The explicit_bzero function has been added to glibc.
  This module is intended to supports its use in GNU programs.
  * doc/glibc-functions/explicit_bzero.texi, lib/explicit_bzero.c:
  * m4/explicit_bzero.m4, modules/explicit_bzero:
  New files.
  * doc/gnulib.texi (Glibc string.h): Link to new doc.
  * lib/string.in.h (explicit_bzero): Declare.
  * m4/string_h.m4 (gl_HEADER_STRING_H_DEFAULTS): Add defaults for it.
  * modules/string (string.h): Substitute its vars.
  

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• doc/glibc-functions/explicit_bzero.texi

• @node explicit_bzero
  @subsection @code{explicit_bzero}
  @findex explicit_bzero
  
  Gnulib module: explicit_bzero
  
  The @code{explicit_bzero} function is an approximation to what is
  needed, and does not suffice in general to erase information.
  Although calling @code{explicit_bzero} should clear the memory in
  question, the information that was in memory may still be available
  elsewhere on the machine.  Proper implementation of information
  erasure requires support from levels below C code.
  
  Portability problems fixed by Gnulib:
  @itemize
  @item
  This function is missing on some platforms:
  glibc 2.24, FreeBSD 10, NetBSD 7.1, OpenBSD 5.4, macOS 10.12, Solaris 11.3,
  and many other systems.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  Although the module's implementation should clear the memory on
  platforms compatible with GCC and on platforms using traditional
  linkers, it may not clear the memory on non-GCC platforms that use
  whole-program optimization.
  @end itemize
  

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