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57 lines
1.9 KiB
Plaintext
57 lines
1.9 KiB
Plaintext
# euidaccess.m4
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# serial 17
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dnl Copyright (C) 2002-2024 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_DEFUN([gl_FUNC_NONREENTRANT_EUIDACCESS],
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[
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AC_REQUIRE([gl_FUNC_EUIDACCESS])
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AC_CHECK_DECLS([setregid])
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AC_DEFINE([PREFER_NONREENTRANT_EUIDACCESS], [1],
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[Define this if you prefer euidaccess to return the correct result
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even if this would make it nonreentrant. Define this only if your
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entire application is safe even if the uid or gid might temporarily
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change. If your application uses signal handlers or threads it
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is probably not safe.])
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])
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AC_DEFUN([gl_FUNC_EUIDACCESS],
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[
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AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
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dnl Persuade glibc <unistd.h> to declare euidaccess().
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AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
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AC_CHECK_FUNCS([euidaccess])
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if test $ac_cv_func_euidaccess = no; then
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HAVE_EUIDACCESS=0
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fi
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])
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# Prerequisites of lib/euidaccess.c.
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AC_DEFUN([gl_PREREQ_EUIDACCESS], [
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dnl Prefer POSIX faccessat over non-standard euidaccess.
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gl_CHECK_FUNCS_ANDROID([faccessat], [[#include <unistd.h>]])
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dnl Try various other non-standard fallbacks.
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AC_CHECK_HEADERS([libgen.h])
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AC_FUNC_GETGROUPS
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# Solaris 9 and 10 need -lgen to get the eaccess function.
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# Save and restore LIBS so -lgen isn't added to it. Otherwise, *all*
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# programs in the package would end up linked with that potentially-shared
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# library, inducing unnecessary run-time overhead.
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EUIDACCESS_LIBGEN=
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AC_SUBST([EUIDACCESS_LIBGEN])
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gl_saved_libs=$LIBS
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AC_SEARCH_LIBS([eaccess], [gen],
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[test "$ac_cv_search_eaccess" = "none required" ||
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EUIDACCESS_LIBGEN=$ac_cv_search_eaccess])
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AC_CHECK_FUNCS([eaccess])
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LIBS=$gl_saved_libs
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# For backward compatibility.
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LIB_EACCESS="$EUIDACCESS_LIBGEN"
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AC_SUBST([LIB_EACCESS])
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])
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