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

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• Hash : ae2b15ba
  Author :
  Date : 2012-01-31T12:15:46
  

  popen: Make more robust on Windows.
  
  * lib/popen.c: On native Windows, use the _popen based code even if
  HAVE_POPEN is set.
  * doc/posix-functions/popen.texi: Mention necessity of COMSPEC
  environment variable on native Windows.
  

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• doc/posix-functions/popen.texi

• @node popen
  @section @code{popen}
  @findex popen
  
  POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/popen.html}
  
  Gnulib module: popen
  
  Portability problems fixed by Gnulib:
  @itemize
  @item
  This function is missing on some platforms:
  MSVC 9.
  @item
  Some platforms start the child with closed stdin or stdout if the
  standard descriptors were closed in the parent:
  Cygwin 1.5.x.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  On native Windows platforms, this functions terminates the current process
  with exit code 127 if the environment variable @code{COMSPEC} is not set.
  @item
  Some platforms mistakenly set the close-on-exec bit, then if it is
  cleared by the application, the platform then leaks file descriptors
  from earlier @code{popen} calls into subsequent @code{popen} children:
  Cygwin 1.5.x.
  @end itemize
  

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