kc3-lang/gnulib/doc/posix-functions/signal.texi

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• Hash : 09ef7461
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  Date : 2008-12-14T14:38:13
  

  Refer to new POSIX:2008 standard.
  

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• doc/posix-functions/signal.texi

• @node signal
  @section @code{signal}
  @findex signal
  
  POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/signal.html}
  
  Gnulib module: ---
  
  Portability problems fixed by Gnulib:
  @itemize
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  On System V platforms, when the signal is triggered, the kernel uninstalls the
  handler (i.e.@: resets the signal's action to SIG_DFL) before invoking the
  handler.  This opens the door to race conditions: undesired things happen
  if the signal is triggered twice and the signal handler was not quick enough
  reinstalling itself as a handler.  On BSD platforms and glibc platforms, on the
  other hand, when the signal is triggered, the kernel blocks the signal
  before invoking the handler.  This is saner, but POSIX still allows either
  behavior.  To avoid this problem, use @code{sigaction} instead of
  @code{signal}.
  @end itemize
  

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