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ffdc270a76
* configure.ac: Remove -with-acl option, since Gnulib does that for us now. (LIBACL_LIBS): Remove; no longer needed. * lib/Makefile.am (CLEANFILES, SUFFIXES): New (empty) macros, for the benefit of the new ACL implementation. * lib/makefile.w32-in (GNULIBOBJS): Add $(BLD)/acl-errno-valid.$(O). ($(BLD)/acl-errno-valid.$(O)): New rule. * lib/acl-errno-valid.c, lib/acl-internal.h, lib/acl.h: * lib/acl_entries.c, lib/errno.in.h, lib/file-has-acl.c: * lib/qcopy-acl.c, lib/qset-acl.c, m4/acl.m4, m4/errno_h.m4: New files, taken from gnulib. * lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate. * admin/merge-gnulib (GNULIB_MODULES): Add qacl. (GNULIB_TOOL_FLAGS): Do not avoid errno. * etc/NEWS: Emacs is no longer limited to POSIX ACLs. --disable-acl, not --without-acl, since we're now using Gnulib's implementation. * nt/config.nt (HAVE_ACL_SET_FILE): Rename from HAVE_POSIX_ACL. * nt/inc/ms-w32.h (EOPNOTSUPP): New macro. * src/Makefile.in (LIB_ACL): New macro. (LIBACL_LIBS): Remove. (LIBES): Use LIB_ACL, not LIBACL_LIBS. * src/fileio.c: Include <acl.h>. Use HAVE_ACL_SET_FILE rather than HAVE_POSIX_ACL. (ACL_NOT_WELL_SUPPORTED): Remove. All uses replaced by !acl_errno_valid. (Fcopy_file) [!WINDOWSNT]: Use qcopy_acl instead of rolling it ourselves. Fixes: debbugs:14295
53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/* Test whether ACLs are well supported on this system.
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Copyright 2013 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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Written by Paul Eggert. */
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#include <config.h>
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#include <acl.h>
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#include <errno.h>
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/* Return true if errno value ERRNUM indicates that ACLs are well
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supported on this system. ERRNUM should be an errno value obtained
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after an ACL-related system call fails. */
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bool
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acl_errno_valid (int errnum)
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{
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/* Recognize some common errors such as from an NFS mount that does
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not support ACLs, even when local drives do. */
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switch (errnum)
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{
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case EBUSY: return false;
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case EINVAL: return false;
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#if defined __APPLE__ && defined __MACH__
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case ENOENT: return false;
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#endif
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case ENOSYS: return false;
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#if defined ENOTSUP && ENOTSUP != EOPNOTSUPP
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# if ENOTSUP != ENOSYS /* Needed for the MS-Windows port of GNU Emacs. */
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case ENOTSUP: return false;
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# endif
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#endif
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case EOPNOTSUPP: return false;
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default: return true;
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}
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}
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