| 1 | # open.m4 serial 15
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| 2 | dnl Copyright (C) 2007-2021 Free Software Foundation, Inc.
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| 3 | dnl This file is free software; the Free Software Foundation
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| 4 | dnl gives unlimited permission to copy and/or distribute it,
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| 5 | dnl with or without modifications, as long as this notice is preserved.
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| 6 |
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| 7 | AC_DEFUN([gl_FUNC_OPEN],
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| 8 | [
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| 9 | AC_REQUIRE([AC_CANONICAL_HOST])
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| 10 | AC_REQUIRE([gl_PREPROC_O_CLOEXEC])
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| 11 | case "$host_os" in
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| 12 | mingw* | pw*)
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| 13 | REPLACE_OPEN=1
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| 14 | ;;
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| 15 | *)
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| 16 | dnl open("foo/") should not create a file when the file name has a
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| 17 | dnl trailing slash. FreeBSD only has the problem on symlinks.
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| 18 | AC_CHECK_FUNCS_ONCE([lstat])
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| 19 | if test "$gl_cv_macro_O_CLOEXEC" != yes; then
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| 20 | REPLACE_OPEN=1
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| 21 | fi
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| 22 | gl_OPEN_TRAILING_SLASH_BUG
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| 23 | case "$gl_cv_func_open_slash" in
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| 24 | *no)
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| 25 | REPLACE_OPEN=1
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| 26 | ;;
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| 27 | esac
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| 28 | ;;
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| 29 | esac
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| 30 | dnl Replace open() for supporting the gnulib-defined fchdir() function,
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| 31 | dnl to keep fchdir's bookkeeping up-to-date.
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| 32 | m4_ifdef([gl_FUNC_FCHDIR], [
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| 33 | if test $REPLACE_OPEN = 0; then
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| 34 | gl_TEST_FCHDIR
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| 35 | if test $HAVE_FCHDIR = 0; then
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| 36 | REPLACE_OPEN=1
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| 37 | fi
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| 38 | fi
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| 39 | ])
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| 40 | dnl Replace open() for supporting the gnulib-defined O_NONBLOCK flag.
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| 41 | m4_ifdef([gl_NONBLOCKING_IO], [
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| 42 | if test $REPLACE_OPEN = 0; then
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| 43 | gl_NONBLOCKING_IO
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| 44 | if test $gl_cv_have_open_O_NONBLOCK != yes; then
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| 45 | REPLACE_OPEN=1
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| 46 | fi
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| 47 | fi
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| 48 | ])
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| 49 | ])
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| 50 |
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| 51 | # Prerequisites of lib/open.c.
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| 52 | AC_DEFUN([gl_PREREQ_OPEN],
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| 53 | [
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| 54 | AC_REQUIRE([gl_PROMOTED_TYPE_MODE_T])
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| 55 | :
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| 56 | ])
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