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| author | Paul Eggert <eggert@cs.ucla.edu> | 2017-11-11 22:33:38 -0800 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2017-11-11 22:34:01 -0800 |
| commit | dd1890b79725d4a044039b476e6ad4592d2c9399 (patch) | |
| tree | d59f823517dd232603a640391352681b04702344 /m4 | |
| parent | 6df7d4f6713faf89b5122ade350c6ae1acdee84d (diff) | |
| download | gnulib-dd1890b79725d4a044039b476e6ad4592d2c9399.tar.gz | |
faccessat: port to macOS (Bug#29231)
macOS faccessat has the same bug that lstat does: if the file
name ends in '/' it ignores the trailing slash.
Problem reported for Emacs by Vincent Zhang.
* doc/posix-functions/faccessat.texi (faccessat): Document this.
* lib/faccessat.c (_GL_INCLUDING_UNISTD_H): Define and undef
around the initial includes. Include errno.h, string.h, sys/stat.h.
(orig_faccessat) [HAVE_FACCESSAT]: New function.
Include "unistd.h" after defining it.
(rpl_faccessat) [HAVE_FACCESSAT]: New implementation.
* lib/unistd.in.h (faccessat) [REPLACE_FACCESSAT]:
Handle in the usual way.
* m4/faccessat.m4 (gl_FUNC_FACCESSAT): Replace faccessat if
lstat dereferences symlinks, since faccessat is likely to
have the same problem.
* m4/unistd_h.m4 (gl_UNISTD_H_DEFAULTS): Default REPLACE_ACCESSAT.
* modules/faccessat (Depends-on): Add fstatat.
Depend if REPLACE_FACCESSAT is 1, too.
(configure.ac): Link if REPLACE_FACCESSAT is 1.
* modules/faccessat-tests (Depends-on): Add symlink.
* modules/unistd (unistd.h): Substitute REPLACE_FACCESSAT.
* tests/test-faccessat.c (main): Test for the bug.
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/faccessat.m4 | 6 | ||||
| -rw-r--r-- | m4/unistd_h.m4 | 3 |
2 files changed, 6 insertions, 3 deletions
diff --git a/m4/faccessat.m4 b/m4/faccessat.m4 index 837ae5407c..f4cb49d166 100644 --- a/m4/faccessat.m4 +++ b/m4/faccessat.m4 @@ -1,4 +1,4 @@ -# serial 6 +# serial 7 # See if we need to provide faccessat replacement. dnl Copyright (C) 2009-2017 Free Software Foundation, Inc. @@ -18,10 +18,12 @@ AC_DEFUN([gl_FUNC_FACCESSAT], AC_CHECK_FUNCS_ONCE([faccessat]) if test $ac_cv_func_faccessat = no; then HAVE_FACCESSAT=0 + elif test "$gl_cv_func_lstat_dereferences_slashed_symlink" != yes; then + REPLACE_FACCESSAT=1 fi ]) -# Prerequisites of lib/faccessat.m4. +# Prerequisites of lib/faccessat.c. AC_DEFUN([gl_PREREQ_FACCESSAT], [ AC_CHECK_FUNCS([access]) diff --git a/m4/unistd_h.m4 b/m4/unistd_h.m4 index cc44677d9e..60e7ea4d04 100644 --- a/m4/unistd_h.m4 +++ b/m4/unistd_h.m4 @@ -1,4 +1,4 @@ -# unistd_h.m4 serial 70 +# unistd_h.m4 serial 71 dnl Copyright (C) 2006-2017 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -159,6 +159,7 @@ AC_DEFUN([gl_UNISTD_H_DEFAULTS], REPLACE_CLOSE=0; AC_SUBST([REPLACE_CLOSE]) REPLACE_DUP=0; AC_SUBST([REPLACE_DUP]) REPLACE_DUP2=0; AC_SUBST([REPLACE_DUP2]) + REPLACE_FACCESSAT=0; AC_SUBST([REPLACE_FACCESSAT]) REPLACE_FCHOWNAT=0; AC_SUBST([REPLACE_FCHOWNAT]) REPLACE_FTRUNCATE=0; AC_SUBST([REPLACE_FTRUNCATE]) REPLACE_GETCWD=0; AC_SUBST([REPLACE_GETCWD]) |