kc3-lang/gnulib/m4/open-cloexec.m4

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• Hash : 990fa9d5
  Author :
  Date : 2017-08-14T13:04:46
  

  open: support O_CLOEXEC
  
  * NEWS, doc/posix-functions/open.texi:
  * doc/posix-functions/openat.texi: Document this.
  * lib/fcntl.in.h (O_CLOEXEC): Default to a nonzero value.
  (GNULIB_defined_O_CLOEXEC): New symbol.
  * lib/open.c: Include cloexec.h.
  (open): Support O_CLOEXEC.
  * lib/openat.c: Include cloexec.h.
  (rpl_openat): Support O_CLOEXEC.
  * lib/popen-safer.c: Do not include cloexec.h.
  (open_noinherit): Remove.
  (popen_safer): Use O_CLOEXEC instead of set_cloexec_flag.
  * lib/save-cwd.c: Do not include cloexec.h.
  (save_cwd): Use O_CLOEXEC instead of set_cloexec_flag.
  * m4/open-cloexec.m4: New file.
  * m4/open.m4 (gl_FUNC_OPEN): Require gl_PREPROC_O_CLOEXEC.
  Replace 'open' if O_CLOEXEC is not present.
  * m4/openat.m4 (gl_FUNC_OPENAT): Require gl_PREPROC_O_CLOEXEC.
  Replace 'openat' if O_CLOEXEC is not present.
  * modules/freopen (Depends-on): Depend on 'open' if replacing freopen.
  * modules/open (Files): Add m4/open-cloexec.m4.
  (Depends-on): Depend on cloexec if replacing 'open'.
  * modules/openat (Files): Add m4/open-cloexec.m4.
  (Depends-on): Depend on cloexec if replacing openat.
  * modules/popen-safer (Depends-on): Remove cloexec.
  * modules/save-cwd (Depends-on): Remove cloexec, and add
  fd-safer-flag and 'open'.
  

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• m4/open-cloexec.m4

• # Test whether O_CLOEXEC is defined.
  
  dnl Copyright 2017 Free Software Foundation, Inc.
  dnl This file is free software; the Free Software Foundation
  dnl gives unlimited permission to copy and/or distribute it,
  dnl with or without modifications, as long as this notice is preserved.
  
  AC_DEFUN([gl_PREPROC_O_CLOEXEC],
  [
    AC_CACHE_CHECK([for O_CLOEXEC],
      [gl_cv_macro_O_CLOEXEC],
      [AC_COMPILE_IFELSE(
         [AC_LANG_PROGRAM([[#include <fcntl.h>
                            #ifndef O_CLOEXEC
                              choke me;
                            #endif
                          ]],
                          [[return O_CLOEXEC;]])],
         [gl_cv_macro_O_CLOEXEC=yes],
         [gl_cv_macro_O_CLOEXEC=no])])
  ])
  

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