| 1 | # euidaccess.m4 serial 15 |
| 2 | dnl Copyright (C) 2002-2013 Free Software Foundation, Inc. |
| 3 | dnl This file is free software; the Free Software Foundation |
| 4 | dnl gives unlimited permission to copy and/or distribute it, |
| 5 | dnl with or without modifications, as long as this notice is preserved. |
| 6 | |
| 7 | AC_DEFUN([gl_FUNC_NONREENTRANT_EUIDACCESS], |
| 8 | [ |
| 9 | AC_REQUIRE([gl_FUNC_EUIDACCESS]) |
| 10 | AC_CHECK_DECLS([setregid]) |
| 11 | AC_DEFINE([PREFER_NONREENTRANT_EUIDACCESS], [1], |
| 12 | [Define this if you prefer euidaccess to return the correct result |
| 13 | even if this would make it nonreentrant. Define this only if your |
| 14 | entire application is safe even if the uid or gid might temporarily |
| 15 | change. If your application uses signal handlers or threads it |
| 16 | is probably not safe.]) |
| 17 | ]) |
| 18 | |
| 19 | AC_DEFUN([gl_FUNC_EUIDACCESS], |
| 20 | [ |
| 21 | AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) |
| 22 | |
| 23 | dnl Persuade glibc <unistd.h> to declare euidaccess(). |
| 24 | AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) |
| 25 | |
| 26 | AC_CHECK_FUNCS([euidaccess]) |
| 27 | if test $ac_cv_func_euidaccess = no; then |
| 28 | HAVE_EUIDACCESS=0 |
| 29 | fi |
| 30 | ]) |
| 31 | |
| 32 | # Prerequisites of lib/euidaccess.c. |
| 33 | AC_DEFUN([gl_PREREQ_EUIDACCESS], [ |
| 34 | dnl Prefer POSIX faccessat over non-standard euidaccess. |
| 35 | AC_CHECK_FUNCS_ONCE([faccessat]) |
| 36 | dnl Try various other non-standard fallbacks. |
| 37 | AC_CHECK_HEADERS([libgen.h]) |
| 38 | AC_FUNC_GETGROUPS |
| 39 | |
| 40 | # Solaris 9 and 10 need -lgen to get the eaccess function. |
| 41 | # Save and restore LIBS so -lgen isn't added to it. Otherwise, *all* |
| 42 | # programs in the package would end up linked with that potentially-shared |
| 43 | # library, inducing unnecessary run-time overhead. |
| 44 | LIB_EACCESS= |
| 45 | AC_SUBST([LIB_EACCESS]) |
| 46 | gl_saved_libs=$LIBS |
| 47 | AC_SEARCH_LIBS([eaccess], [gen], |
| 48 | [test "$ac_cv_search_eaccess" = "none required" || |
| 49 | LIB_EACCESS=$ac_cv_search_eaccess]) |
| 50 | AC_CHECK_FUNCS([eaccess]) |
| 51 | LIBS=$gl_saved_libs |
| 52 | ]) |