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

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  Date : 2019-09-22T23:23:20
  

  Update some URLs
  
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• doc/posix-functions/sigaction.texi

• @node sigaction
  @section @code{sigaction}
  @findex sigaction
  
  POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/sigaction.html}
  
  Gnulib module: sigaction
  
  Portability problems fixed by Gnulib:
  @itemize
  @item
  This function is missing on some platforms:
  mingw, MSVC 14.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  POSIX recommends that when specifying SA_RESETHAND, SA_NODEFER must
  also be specified.
  
  @item
  Support for SA_ONSTACK is missing on some platforms:
  mingw, MSVC 14, cygwin.
  
  @item
  Support for SA_SIGINFO is missing on some platforms:
  mingw, MSVC 14.
  
  @item
  Support for SIGCHLD, and thus for SA_NOCLDSTOP and SA_NOCLDWAIT, is
  missing on some platforms:
  mingw, MSVC 14.
  
  @item
  Support for SA_RESETHAND is missing on some platforms:
  NonStop.
  
  @item
  Support for SA_RESTART is missing on some platforms:
  mingw, MSVC 14, NonStop.
  
  @item
  The symbolic value @code{SIG_IGN} for the @code{SIGCHLD} signal is equivalent
  to a signal handler
  @smallexample
  void handle_child (int sigchld)
  @{
    while (waitpid (-1, NULL, WNOHANG) > 0)
      ;
  @}
  @end smallexample
  except that @code{SIG_IGN} for @code{SIGCHLD} has the effect that the children
  execution times are not accounted in the @code{times} function.
  On some platforms (BSD? SystemV? Linux?), you need to use the @code{sigaction}
  flag @code{SA_NOCLDWAIT} in order to obtain this behavior.
  @end itemize
  

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