*printf-posix: Work around bug with %lc of 0 on many platforms.

* lib/vasnprintf.c (local_wctomb): Define also for
NEED_PRINTF_DIRECTIVE_LC.
(VASNPRINTF): Implement %lc handling ourselves if
NEED_PRINTF_DIRECTIVE_LC.
* m4/printf.m4 (gl_PRINTF_DIRECTIVE_LC): New macro.
* m4/vasnprintf.m4 (gl_PREREQ_VASNPRINTF_DIRECTIVE_LC): New macro.
(gl_PREREQ_VASNPRINTF_WITH_EXTRAS): Invoke it.
* m4/dprintf-posix.m4 (gl_FUNC_DPRINTF_POSIX): Require
gl_PRINTF_DIRECTIVE_LC and test its result. Invoke
gl_PREREQ_VASNPRINTF_DIRECTIVE_LC.
* m4/fprintf-posix.m4 (gl_FUNC_FPRINTF_POSIX): Likewise.
* m4/obstack-printf-posix.m4 (gl_FUNC_OBSTACK_PRINTF_POSIX): Likewise.
* m4/snprintf-posix.m4 (gl_FUNC_SNPRINTF_POSIX): Likewise.
* m4/sprintf-posix.m4 (gl_FUNC_SPRINTF_POSIX): Likewise.
* m4/vasnprintf-posix.m4 (gl_FUNC_VASNPRINTF_POSIX): Likewise.
* m4/vasprintf-posix.m4 (gl_FUNC_VASPRINTF_POSIX): Likewise.
* m4/vdprintf-posix.m4 (gl_FUNC_VDPRINTF_POSIX): Likewise.
* m4/vfprintf-posix.m4 (gl_FUNC_VFPRINTF_POSIX): Likewise.
* m4/vsnprintf-posix.m4 (gl_FUNC_VSNPRINTF_POSIX): Likewise.
* m4/vsprintf-posix.m4 (gl_FUNC_VSPRINTF_POSIX): Likewise.
* tests/test-snprintf-posix.h (test_function): Add more tests for the
%c and %lc directives.
* tests/test-sprintf-posix.h (test_function): Likewise.
* tests/test-vasnprintf-posix.c (test_function): Likewise.
* tests/test-vasprintf-posix.c (test_function): Likewise.
* doc/glibc-functions/asprintf.texi: Mention the %lc 0 bug.
* doc/glibc-functions/obstack_printf.texi: Likewise.
* doc/glibc-functions/obstack_vprintf.texi: Likewise.
* doc/glibc-functions/vasprintf.texi: Likewise.
* doc/posix-functions/dprintf.texi: Likewise.
* doc/posix-functions/fprintf.texi: Likewise.
* doc/posix-functions/printf.texi: Likewise.
* doc/posix-functions/snprintf.texi: Likewise.
* doc/posix-functions/sprintf.texi: Likewise.
* doc/posix-functions/vdprintf.texi: Likewise.
* doc/posix-functions/vfprintf.texi: Likewise.
* doc/posix-functions/vprintf.texi: Likewise.
* doc/posix-functions/vsnprintf.texi: Likewise.
* doc/posix-functions/vsprintf.texi: Likewise.

14 files changed, 56 insertions, 0 deletions

diff --git a/doc/glibc-functions/asprintf.texi b/doc/glibc-functions/asprintf.texi
index 47708c40fb..70de08dd1c 100644
--- a/doc/glibc-functions/asprintf.texi
+++ b/doc/glibc-functions/asprintf.texi
@@ -71,6 +71,10 @@ printf @code{"%010f"} of NaN and Infinity yields an incorrect result (padded
 with zeroes) on some platforms:
 Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, Solaris 11.0, Cygwin 1.5.x.
 @item
+This function produces wrong output for the @samp{lc} directive with a NUL
+wide character argument on some platforms:
+glibc 2.35, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
+@item
 This function can crash in out-of-memory conditions on some platforms:
 FreeBSD 13.0, NetBSD 5.0.
 @end itemize
diff --git a/doc/glibc-functions/obstack_printf.texi b/doc/glibc-functions/obstack_printf.texi
index 7feae78b36..8b13e1296e 100644
--- a/doc/glibc-functions/obstack_printf.texi
+++ b/doc/glibc-functions/obstack_printf.texi
@@ -77,6 +77,10 @@ This function does not support precisions larger than 512 or 1024 in integer,
 floating-point and pointer output on some platforms:
 Solaris 10/x86, mingw, MSVC/clang.
 @item
+This function produces wrong output for the @samp{lc} directive with a NUL
+wide character argument on some platforms:
+glibc 2.35, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
+@item
 This function can crash in out-of-memory conditions on some platforms:
 FreeBSD 13.0, NetBSD 5.0.
 @item
diff --git a/doc/glibc-functions/obstack_vprintf.texi b/doc/glibc-functions/obstack_vprintf.texi
index cdded10221..2ea59ef4fa 100644
--- a/doc/glibc-functions/obstack_vprintf.texi
+++ b/doc/glibc-functions/obstack_vprintf.texi
@@ -77,6 +77,10 @@ This function does not support precisions larger than 512 or 1024 in integer,
 floating-point and pointer output on some platforms:
 Solaris 10/x86, mingw, MSVC/clang.
 @item
+This function produces wrong output for the @samp{lc} directive with a NUL
+wide character argument on some platforms:
+glibc 2.35, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
+@item
 This function can crash in out-of-memory conditions on some platforms:
 FreeBSD 13.0, NetBSD 5.0.
 @item
diff --git a/doc/glibc-functions/vasprintf.texi b/doc/glibc-functions/vasprintf.texi
index 2f69df8e78..ef1be6bb88 100644
--- a/doc/glibc-functions/vasprintf.texi
+++ b/doc/glibc-functions/vasprintf.texi
@@ -71,6 +71,10 @@ printf @code{"%010f"} of NaN and Infinity yields an incorrect result (padded
 with zeroes) on some platforms:
 Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, Solaris 11.0, Cygwin 1.5.x.
 @item
+This function produces wrong output for the @samp{lc} directive with a NUL
+wide character argument on some platforms:
+glibc 2.35, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
+@item
 This function can crash in out-of-memory conditions on some platforms:
 FreeBSD 13.0, NetBSD 5.0.
 @end itemize
diff --git a/doc/posix-functions/dprintf.texi b/doc/posix-functions/dprintf.texi
index 7d5aeb9051..09e308c33b 100644
--- a/doc/posix-functions/dprintf.texi
+++ b/doc/posix-functions/dprintf.texi
@@ -44,6 +44,10 @@ Solaris 11.4.
 This function does not support precisions larger than 512 or 1024 in integer,
 floating-point and pointer output on some platforms:
 AIX 7.1.
+@item
+This function produces wrong output for the @samp{lc} directive with a NUL
+wide character argument on some platforms:
+glibc 2.35, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
 @end itemize
 
 Portability problems not fixed by Gnulib:
diff --git a/doc/posix-functions/fprintf.texi b/doc/posix-functions/fprintf.texi
index eedd9babbf..513777c0a4 100644
--- a/doc/posix-functions/fprintf.texi
+++ b/doc/posix-functions/fprintf.texi
@@ -69,6 +69,10 @@ This function mishandles large floating point precisions
 on some platforms:
 Solaris 10.
 @item
+This function produces wrong output for the @samp{lc} directive with a NUL
+wide character argument on some platforms:
+glibc 2.35, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
+@item
 This function can crash in out-of-memory conditions on some platforms:
 FreeBSD 13.0, NetBSD 5.0.
 @end itemize
diff --git a/doc/posix-functions/printf.texi b/doc/posix-functions/printf.texi
index c32881c2cc..8a3971aa30 100644
--- a/doc/posix-functions/printf.texi
+++ b/doc/posix-functions/printf.texi
@@ -69,6 +69,10 @@ This function mishandles large floating point precisions
 on some platforms:
 Solaris 10.
 @item
+This function produces wrong output for the @samp{lc} directive with a NUL
+wide character argument on some platforms:
+glibc 2.35, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
+@item
 This function can crash in out-of-memory conditions on some platforms:
 FreeBSD 13.0, NetBSD 5.0.
 @end itemize
diff --git a/doc/posix-functions/snprintf.texi b/doc/posix-functions/snprintf.texi
index 6d8453b9fe..9ea76cfa8b 100644
--- a/doc/posix-functions/snprintf.texi
+++ b/doc/posix-functions/snprintf.texi
@@ -80,6 +80,10 @@ This function mishandles large floating point precisions
 on some platforms:
 Solaris 10.
 @item
+This function produces wrong output for the @samp{lc} directive with a NUL
+wide character argument on some platforms:
+glibc 2.35, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
+@item
 This function can crash in out-of-memory conditions on some platforms:
 FreeBSD 13.0, NetBSD 5.0.
 @item
diff --git a/doc/posix-functions/sprintf.texi b/doc/posix-functions/sprintf.texi
index 8974498ebf..57c42c294d 100644
--- a/doc/posix-functions/sprintf.texi
+++ b/doc/posix-functions/sprintf.texi
@@ -69,6 +69,10 @@ This function mishandles large floating point precisions
 on some platforms:
 Solaris 10.
 @item
+This function produces wrong output for the @samp{lc} directive with a NUL
+wide character argument on some platforms:
+glibc 2.35, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
+@item
 This function can crash in out-of-memory conditions on some platforms:
 FreeBSD 13.0, NetBSD 5.0.
 @item
diff --git a/doc/posix-functions/vdprintf.texi b/doc/posix-functions/vdprintf.texi
index d4de64ee25..d533d32892 100644
--- a/doc/posix-functions/vdprintf.texi
+++ b/doc/posix-functions/vdprintf.texi
@@ -44,6 +44,10 @@ Solaris 11.4.
 This function does not support precisions larger than 512 or 1024 in integer,
 floating-point and pointer output on some platforms:
 AIX 7.1.
+@item
+This function produces wrong output for the @samp{lc} directive with a NUL
+wide character argument on some platforms:
+glibc 2.35, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
 @end itemize
 
 Portability problems not fixed by Gnulib:
diff --git a/doc/posix-functions/vfprintf.texi b/doc/posix-functions/vfprintf.texi
index f3ec56b5a6..252ac10e2b 100644
--- a/doc/posix-functions/vfprintf.texi
+++ b/doc/posix-functions/vfprintf.texi
@@ -69,6 +69,10 @@ This function mishandles large floating point precisions
 on some platforms:
 Solaris 10.
 @item
+This function produces wrong output for the @samp{lc} directive with a NUL
+wide character argument on some platforms:
+glibc 2.35, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
+@item
 This function can crash in out-of-memory conditions on some platforms:
 FreeBSD 13.0, NetBSD 5.0.
 @end itemize
diff --git a/doc/posix-functions/vprintf.texi b/doc/posix-functions/vprintf.texi
index 6e05d41002..8272e50fd9 100644
--- a/doc/posix-functions/vprintf.texi
+++ b/doc/posix-functions/vprintf.texi
@@ -69,6 +69,10 @@ This function mishandles large floating point precisions
 on some platforms:
 Solaris 10.
 @item
+This function produces wrong output for the @samp{lc} directive with a NUL
+wide character argument on some platforms:
+glibc 2.35, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
+@item
 This function can crash in out-of-memory conditions on some platforms:
 FreeBSD 13.0, NetBSD 5.0.
 @end itemize
diff --git a/doc/posix-functions/vsnprintf.texi b/doc/posix-functions/vsnprintf.texi
index 660ccfb1c3..3531644660 100644
--- a/doc/posix-functions/vsnprintf.texi
+++ b/doc/posix-functions/vsnprintf.texi
@@ -73,6 +73,10 @@ This function mishandles large floating point precisions
 on some platforms:
 Solaris 10.
 @item
+This function produces wrong output for the @samp{lc} directive with a NUL
+wide character argument on some platforms:
+glibc 2.35, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
+@item
 This function can crash in out-of-memory conditions on some platforms:
 FreeBSD 13.0, NetBSD 5.0.
 @item
diff --git a/doc/posix-functions/vsprintf.texi b/doc/posix-functions/vsprintf.texi
index 8af4bdf279..27ec5b9141 100644
--- a/doc/posix-functions/vsprintf.texi
+++ b/doc/posix-functions/vsprintf.texi
@@ -69,6 +69,10 @@ This function mishandles large floating point precisions
 on some platforms:
 Solaris 10.
 @item
+This function produces wrong output for the @samp{lc} directive with a NUL
+wide character argument on some platforms:
+glibc 2.35, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
+@item
 This function can crash in out-of-memory conditions on some platforms:
 FreeBSD 13.0, NetBSD 5.0.
 @item