Re: POSIX 2008 available, openat

[Bruno Haible]

Jim Meyering wrote:
> Users expect tools like chmod -R, du and find to work even when run from
> an unreadable directory.  Once you impose that requirement, you have
> admitted that save_cwd and restore_cwd are required.  With them you must
> admit the possibility of restore_cwd failure.  And openat's interface
> does not allow for that, since it must not change the working directory.
> Since I require that coreutils applications use the *at-function
> interfaces, I'm stuck with the possibility, however remote, that a
> normally library-quality *at-function may exit.

OK. Then let's document the current situation. I'm applying this:


2008-12-15  Bruno Haible  <address@hidden>

        * doc/posix-functions/openat.texi: Mention the 'openat' module.
        * doc/posix-functions/fchmodat.texi: Likewise.
        * doc/posix-functions/fchownat.texi: Likewise.
        * doc/posix-functions/fdopendir.texi: Likewise.
        * doc/posix-functions/fstatat.texi: Likewise.
        * doc/posix-functions/mkdirat.texi: Likewise.
        * doc/posix-functions/unlinkat.texi: Likewise.

--- doc/posix-functions/fchmodat.texi.orig      2008-12-15 12:29:26.000000000 
+0100
+++ doc/posix-functions/fchmodat.texi   2008-12-15 12:26:44.000000000 +0100
@@ -4,15 +4,16 @@
 
 POSIX specification: 
@url{http://www.opengroup.org/onlinepubs/9699919799/functions/fchmodat.html}
 
-Gnulib module: ---
+Gnulib module: openat
 
 Portability problems fixed by Gnulib:
 @itemize
address@hidden
+This function is missing on some platforms:
+glibc 2.3.6, MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, 
HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin, mingw, Interix 3.5, BeOS.
+But the replacement function is not safe to be used in libraries and is not 
multithread-safe.
 @end itemize
 
 Portability problems not fixed by Gnulib:
 @itemize
address@hidden
-This function is missing on some platforms:
-glibc 2.3.6, MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, 
HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin, mingw, Interix 3.5, BeOS.
 @end itemize
--- doc/posix-functions/fchownat.texi.orig      2008-12-15 12:29:26.000000000 
+0100
+++ doc/posix-functions/fchownat.texi   2008-12-15 12:26:44.000000000 +0100
@@ -4,15 +4,16 @@
 
 POSIX specification: 
@url{http://www.opengroup.org/onlinepubs/9699919799/functions/fchownat.html}
 
-Gnulib module: ---
+Gnulib module: openat
 
 Portability problems fixed by Gnulib:
 @itemize
address@hidden
+This function is missing on some platforms:
+glibc 2.3.6, MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, 
HP-UX 11, IRIX 6.5, OSF/1 5.1, Cygwin, mingw, Interix 3.5, BeOS.
+But the replacement function is not safe to be used in libraries and is not 
multithread-safe.
 @end itemize
 
 Portability problems not fixed by Gnulib:
 @itemize
address@hidden
-This function is missing on some platforms:
-glibc 2.3.6, MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, 
HP-UX 11, IRIX 6.5, OSF/1 5.1, Cygwin, mingw, Interix 3.5, BeOS.
 @end itemize
--- doc/posix-functions/fdopendir.texi.orig     2008-12-15 12:29:26.000000000 
+0100
+++ doc/posix-functions/fdopendir.texi  2008-12-15 12:26:44.000000000 +0100
@@ -4,15 +4,16 @@
 
 POSIX specification: 
@url{http://www.opengroup.org/onlinepubs/9699919799/functions/fdopendir.html}
 
-Gnulib module: ---
+Gnulib module: openat
 
 Portability problems fixed by Gnulib:
 @itemize
address@hidden
+This function is missing on some platforms:
+glibc 2.3.6, MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, 
HP-UX 11, IRIX 6.5, OSF/1 5.1, Cygwin, mingw, Interix 3.5, BeOS.
+But the replacement function is not safe to be used in libraries and is not 
multithread-safe.
 @end itemize
 
 Portability problems not fixed by Gnulib:
 @itemize
address@hidden
-This function is missing on some platforms:
-glibc 2.3.6, MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, 
HP-UX 11, IRIX 6.5, OSF/1 5.1, Cygwin, mingw, Interix 3.5, BeOS.
 @end itemize
--- doc/posix-functions/fstatat.texi.orig       2008-12-15 12:29:26.000000000 
+0100
+++ doc/posix-functions/fstatat.texi    2008-12-15 12:26:44.000000000 +0100
@@ -4,15 +4,16 @@
 
 POSIX specification: 
@url{http://www.opengroup.org/onlinepubs/9699919799/functions/fstatat.html}
 
-Gnulib module: ---
+Gnulib module: openat
 
 Portability problems fixed by Gnulib:
 @itemize
address@hidden
+This function is missing on some platforms:
+glibc 2.3.6, MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, 
HP-UX 11, IRIX 6.5, OSF/1 5.1, Cygwin, mingw, Interix 3.5, BeOS.
+But the replacement function is not safe to be used in libraries and is not 
multithread-safe.
 @end itemize
 
 Portability problems not fixed by Gnulib:
 @itemize
address@hidden
-This function is missing on some platforms:
-glibc 2.3.6, MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, 
HP-UX 11, IRIX 6.5, OSF/1 5.1, Cygwin, mingw, Interix 3.5, BeOS.
 @end itemize
--- doc/posix-functions/mkdirat.texi.orig       2008-12-15 12:29:26.000000000 
+0100
+++ doc/posix-functions/mkdirat.texi    2008-12-15 12:26:44.000000000 +0100
@@ -4,15 +4,16 @@
 
 POSIX specification: 
@url{http://www.opengroup.org/onlinepubs/9699919799/functions/mkdirat.html}
 
-Gnulib module: ---
+Gnulib module: openat
 
 Portability problems fixed by Gnulib:
 @itemize
address@hidden
+This function is missing on some platforms:
+glibc 2.3.6, MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, 
HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin, mingw, Interix 3.5, BeOS.
+But the replacement function is not safe to be used in libraries and is not 
multithread-safe.
 @end itemize
 
 Portability problems not fixed by Gnulib:
 @itemize
address@hidden
-This function is missing on some platforms:
-glibc 2.3.6, MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, 
HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin, mingw, Interix 3.5, BeOS.
 @end itemize
--- doc/posix-functions/openat.texi.orig        2008-12-15 12:29:26.000000000 
+0100
+++ doc/posix-functions/openat.texi     2008-12-15 12:26:44.000000000 +0100
@@ -4,15 +4,16 @@
 
 POSIX specification: 
@url{http://www.opengroup.org/onlinepubs/9699919799/functions/openat.html}
 
-Gnulib module: ---
+Gnulib module: openat
 
 Portability problems fixed by Gnulib:
 @itemize
address@hidden
+This function is missing on some platforms:
+glibc 2.3.6, MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, 
HP-UX 11, IRIX 6.5, OSF/1 5.1, Cygwin, mingw, Interix 3.5, BeOS.
+But the replacement function is not safe to be used in libraries and is not 
multithread-safe.
 @end itemize
 
 Portability problems not fixed by Gnulib:
 @itemize
address@hidden
-This function is missing on some platforms:
-glibc 2.3.6, MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, 
HP-UX 11, IRIX 6.5, OSF/1 5.1, Cygwin, mingw, Interix 3.5, BeOS.
 @end itemize
--- doc/posix-functions/unlinkat.texi.orig      2008-12-15 12:29:26.000000000 
+0100
+++ doc/posix-functions/unlinkat.texi   2008-12-15 12:26:44.000000000 +0100
@@ -4,15 +4,16 @@
 
 POSIX specification: 
@url{http://www.opengroup.org/onlinepubs/9699919799/functions/unlinkat.html}
 
-Gnulib module: ---
+Gnulib module: openat
 
 Portability problems fixed by Gnulib:
 @itemize
address@hidden
+This function is missing on some platforms:
+glibc 2.3.6, MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, 
HP-UX 11, IRIX 6.5, OSF/1 5.1, Cygwin, mingw, Interix 3.5, BeOS.
+But the replacement function is not safe to be used in libraries and is not 
multithread-safe.
 @end itemize
 
 Portability problems not fixed by Gnulib:
 @itemize
address@hidden
-This function is missing on some platforms:
-glibc 2.3.6, MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, 
HP-UX 11, IRIX 6.5, OSF/1 5.1, Cygwin, mingw, Interix 3.5, BeOS.
 @end itemize