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| author | Paul Eggert <eggert@cs.ucla.edu> | 2017-08-14 13:04:46 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2017-08-14 13:05:23 -0700 |
| commit | 990fa9d50c060b3acf2bcf1f1e0578b6e975310b (patch) | |
| tree | 262cf411ced696640532e4b67abeaeea5e397612 /m4/open-cloexec.m4 | |
| parent | 825e198de85f173e74500d2adb1ff3bb9276ad5a (diff) | |
| download | gnulib-990fa9d50c060b3acf2bcf1f1e0578b6e975310b.tar.gz | |
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'.
Diffstat (limited to 'm4/open-cloexec.m4')
| -rw-r--r-- | m4/open-cloexec.m4 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/m4/open-cloexec.m4 b/m4/open-cloexec.m4 new file mode 100644 index 0000000000..897af66910 --- /dev/null +++ b/m4/open-cloexec.m4 @@ -0,0 +1,21 @@ +# 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])]) +]) |