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| author | Paul Eggert <eggert@cs.ucla.edu> | 2014-10-18 23:22:36 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2014-10-18 23:23:48 -0700 |
| commit | 032bd151051bfdcb7387af627342ae85637e3253 (patch) | |
| tree | 79fa08dc5cf39b066a041ec67890f48ab8904a13 /m4 | |
| parent | cb3a9b8b565ba8ae3425c591d9d8399f524f4b6f (diff) | |
| download | gnulib-032bd151051bfdcb7387af627342ae85637e3253.tar.gz | |
symlinkat: port to AIX 7.1
* doc/posix-functions/symlinkat.texi (symlinkat):
Mention AIX porting problem.
* lib/symlinkat.c: Always include errno.h.
(rpl_symlinkat) [HAVE_SYMLINKAT]: New function.
* lib/unistd.in.h (symlinkat): Add replacement machinery.
* m4/symlinkat.m4 (gl_FUNC_SYMLINKAT): Check symlinkat behavior.
* m4/unistd_h.m4 (gl_UNISTD_H_DEFAULTS): Add REPLACE_SYMLINKAT.
* modules/symlinkat (Depends-on): Add fstatat if REPLACE_SYMLINKAT.
(configure.ac): Also compile replacement if REPLACE_SYMLINKAT.
* modules/unistd (unistd.h): Substitute REPLACE_SYMLINKAT.
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/symlinkat.m4 | 35 | ||||
| -rw-r--r-- | m4/unistd_h.m4 | 1 |
2 files changed, 35 insertions, 1 deletions
diff --git a/m4/symlinkat.m4 b/m4/symlinkat.m4 index db7ad487dd..21648bfb16 100644 --- a/m4/symlinkat.m4 +++ b/m4/symlinkat.m4 @@ -1,4 +1,4 @@ -# serial 5 +# serial 6 # See if we need to provide symlinkat replacement. dnl Copyright (C) 2009-2014 Free Software Foundation, Inc. @@ -16,5 +16,38 @@ AC_DEFUN([gl_FUNC_SYMLINKAT], AC_CHECK_FUNCS_ONCE([symlinkat]) if test $ac_cv_func_symlinkat = no; then HAVE_SYMLINKAT=0 + else + AC_CACHE_CHECK([whether symlinkat handles trailing slash correctly], + [gl_cv_func_symlinkat_works], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[#include <fcntl.h> + #include <unistd.h> + ]], + [[int result = 0; + if (!symlinkat ("a", AT_FDCWD, "conftest.link/")) + result |= 1; + if (symlinkat ("conftest.f", AT_FDCWD, "conftest.lnk2")) + result |= 2; + else if (!symlinkat ("a", AT_FDCWD, "conftest.lnk2/")) + result |= 4; + return result; + ]])], + [gl_cv_func_symlinkat_works=yes], + [gl_cv_func_symlinkat_works=no], + [case "$host_os" in + # Guess yes on glibc systems. + *-gnu*) gl_cv_func_symlinkat_works="guessing yes" ;; + # If we don't know, assume the worst. + *) gl_cv_func_symlinkat_works="guessing no" ;; + esac + ]) + rm -f conftest.f conftest.link conftest.lnk2]) + case "$gl_cv_func_symlinkat_works" in + *yes) ;; + *) + REPLACE_SYMLINKAT=1 + ;; + esac fi ]) diff --git a/m4/unistd_h.m4 b/m4/unistd_h.m4 index 6d217d66b4..d7346a0b05 100644 --- a/m4/unistd_h.m4 +++ b/m4/unistd_h.m4 @@ -177,6 +177,7 @@ AC_DEFUN([gl_UNISTD_H_DEFAULTS], REPLACE_RMDIR=0; AC_SUBST([REPLACE_RMDIR]) REPLACE_SLEEP=0; AC_SUBST([REPLACE_SLEEP]) REPLACE_SYMLINK=0; AC_SUBST([REPLACE_SYMLINK]) + REPLACE_SYMLINKAT=0; AC_SUBST([REPLACE_SYMLINKAT]) REPLACE_TTYNAME_R=0; AC_SUBST([REPLACE_TTYNAME_R]) REPLACE_UNLINK=0; AC_SUBST([REPLACE_UNLINK]) REPLACE_UNLINKAT=0; AC_SUBST([REPLACE_UNLINKAT]) |