Initial commit

2025-09-05 18:57:43 +03:00
commit dd17b75f03
11 changed files with 898 additions and 0 deletions
@@ -0,0 +1,2 @@
 # Exclude bpm archives
 *.bpm
@@ -0,0 +1,9 @@
 name: sharutils
 description: Utility that makes so-called shell archives out of many files
 version: 4.15.2
 url: https://www.gnu.org/software/sharutils/
 license: GPL3-or-later
 architecture: any
 depends: ["glibc"]
 make_depends: ["gettext"]
 type: source
@@ -0,0 +1,87 @@
 From 851a240296ad2ec2a5f67e84d284d3bf7882745e Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <[email protected]>
 Date: Mon, 15 Dec 2014 11:20:32 +0100
 Subject: [PATCH] Pass compilation with -Werror=format-security
 MIME-Version: 1.0
 Content-Type: text/plain; charset=UTF-8
 Content-Transfer-Encoding: 8bit
 <https://bugzilla.redhat.com/show_bug.cgi?id=1037323>
 Signed-off-by: Petr Písař <[email protected]>
 ---
 libopts/genshell.h  | 2 +-
 src/shar-opts.h     | 2 +-
 src/unshar-opts.h   | 2 +-
 src/uudecode-opts.h | 2 +-
 src/uuencode-opts.h | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)
 diff --git a/libopts/genshell.h b/libopts/genshell.h
 index 1c18735..0a69bc2 100644
 --- a/libopts/genshell.h
 +++ b/libopts/genshell.h
@@ -168,7 +168,7 @@ extern tOptions genshelloptOptions;
 #   endif
 # ifndef ATTRIBUTE_FORMAT_ARG
 -#   define ATTRIBUTE_FORMAT_ARG(_a)
 +#   define ATTRIBUTE_FORMAT_ARG(_a) __attribute__ ((format_arg(_a)))
 # endif
 static inline char* aoGetsText(char const* pz) ATTRIBUTE_FORMAT_ARG(1);
 diff --git a/src/shar-opts.h b/src/shar-opts.h
 index 64f2f12..a32b69d 100644
 --- a/src/shar-opts.h
 +++ b/src/shar-opts.h
@@ -374,7 +374,7 @@ extern tOptions sharOptions;
 #   endif
 # ifndef ATTRIBUTE_FORMAT_ARG
 -#   define ATTRIBUTE_FORMAT_ARG(_a)
 +#   define ATTRIBUTE_FORMAT_ARG(_a) __attribute__ ((format_arg(_a)))
 # endif
 static inline char* aoGetsText(char const* pz) ATTRIBUTE_FORMAT_ARG(1);
 diff --git a/src/unshar-opts.h b/src/unshar-opts.h
 index ae697af..19e8be7 100644
 --- a/src/unshar-opts.h
 +++ b/src/unshar-opts.h
@@ -211,7 +211,7 @@ extern tOptions unsharOptions;
 #   endif
 # ifndef ATTRIBUTE_FORMAT_ARG
 -#   define ATTRIBUTE_FORMAT_ARG(_a)
 +#   define ATTRIBUTE_FORMAT_ARG(_a) __attribute__ ((format_arg(_a)))
 # endif
 static inline char* aoGetsText(char const* pz) ATTRIBUTE_FORMAT_ARG(1);
 diff --git a/src/uudecode-opts.h b/src/uudecode-opts.h
 index d457488..fd11a20 100644
 --- a/src/uudecode-opts.h
 +++ b/src/uudecode-opts.h
@@ -189,7 +189,7 @@ extern tOptions uudecodeOptions;
 #   endif
 # ifndef ATTRIBUTE_FORMAT_ARG
 -#   define ATTRIBUTE_FORMAT_ARG(_a)
 +#   define ATTRIBUTE_FORMAT_ARG(_a) __attribute__ ((format_arg(_a)))
 # endif
 static inline char* aoGetsText(char const* pz) ATTRIBUTE_FORMAT_ARG(1);
 diff --git a/src/uuencode-opts.h b/src/uuencode-opts.h
 index 7c7ed78..41352ea 100644
 --- a/src/uuencode-opts.h
 +++ b/src/uuencode-opts.h
@@ -185,7 +185,7 @@ extern tOptions uuencodeOptions;
 #   endif
 # ifndef ATTRIBUTE_FORMAT_ARG
 -#   define ATTRIBUTE_FORMAT_ARG(_a)
 +#   define ATTRIBUTE_FORMAT_ARG(_a) __attribute__ ((format_arg(_a)))
 # endif
 static inline char* aoGetsText(char const* pz) ATTRIBUTE_FORMAT_ARG(1);
 -- 
 1.9.3
@@ -0,0 +1,39 @@
 From 4c47a36fb6e2e4349995376cee063bb37d4e68e3 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <[email protected]>
 Date: Thu, 23 Jan 2020 15:57:05 +0100
 Subject: [PATCH 2/2] Do not include lib/md5.c into src/shar.c
 MIME-Version: 1.0
 Content-Type: text/plain; charset=UTF-8
 Content-Transfer-Encoding: 8bit
 lib/md5.o is part of libgnu.a that is linked to shar. There is no
 point in linking md5.o twice into shar executable. Moreover SuSE
 reports that this triggers a linking error with GCC 10:
 /usr/lib64/gcc/x86_64-suse-linux/9/../../../../x86_64-suse-linux/bin/ld:
 ../lib/libgnu.a(md5.o): in function `md5_stream':
 [   30s] md5.c:(.text+0x15d): multiple definition of `md5_stream';
 shar.o:shar.c:(.text+0x28): first defined here
 <https://lists.gnu.org/archive/html/bug-gnu-utils/2020-01/msg00001.html>
 Signed-off-by: Petr Písař <[email protected]>
 ---
 src/shar.c | 1 -
 1 file changed, 1 deletion(-)
 diff --git a/src/shar.c b/src/shar.c
 index 11cbada..6d7ed1d 100644
 --- a/src/shar.c
 +++ b/src/shar.c
@@ -53,7 +53,6 @@ static const char cright_years_z[] =
 #include "inttostr.h"
 #include "liballoca.h"
 -#include "md5.c"
 #include "md5.h"
 #include "quotearg.h"
 #include "xalloc.h"
 -- 
 2.21.1
@@ -0,0 +1,58 @@
 From 1067cdba6d08f2a765cb0ea371189a5b703eb4db Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <[email protected]>
 Date: Thu, 22 Feb 2018 16:39:43 +0100
 Subject: [PATCH] Fix a heap-buffer-overflow in find_archive()
 MIME-Version: 1.0
 Content-Type: text/plain; charset=UTF-8
 Content-Transfer-Encoding: 8bit
 rw_buffer has allocated rw_base_size bytes. But subsequend fgets() in
 find_archive() reads up-to BUFSIZ bytes.
 On my system, BUFSIZ is 8192. rw_base_size is usually equaled to
 a memory page size, 4096 on my system. Thus find_archive() can write
 beyonded allocated memmory for rw_buffer array:
 $ valgrind -- ./unshar /tmp/id\:000000\,sig\:06\,src\:000005+000030\,op\:splice\,rep\:4
 ==30582== Memcheck, a memory error detector
 ==30582== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
 ==30582== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
 ==30582== Command: ./unshar /tmp/id:000000,sig:06,src:000005+000030,op:splice,rep:4
 ==30582==
 ==30582== Invalid write of size 1
 ==30582==    at 0x4EAB480: _IO_getline_info (in /usr/lib64/libc-2.27.so)
 ==30582==    by 0x4EB47C2: fgets_unlocked (in /usr/lib64/libc-2.27.so)
 ==30582==    by 0x10BF60: fgets_unlocked (stdio2.h:320)
 ==30582==    by 0x10BF60: find_archive (unshar.c:243)
 ==30582==    by 0x10BF60: unshar_file (unshar.c:379)
 ==30582==    by 0x10BCCC: validate_fname (unshar-opts.c:604)
 ==30582==    by 0x10BCCC: main (unshar-opts.c:639)
 ==30582==  Address 0x523a790 is 0 bytes after a block of size 4,096 alloc'd
 ==30582==    at 0x4C2DBBB: malloc (vg_replace_malloc.c:299)
 ==30582==    by 0x10C670: init_unshar (unshar.c:450)
 ==30582==    by 0x10BC55: main (unshar-opts.c:630)
 This was reported in
 <http://lists.gnu.org/archive/html/bug-gnu-utils/2018-02/msg00004.html>.
 Signed-off-by: Petr Písař <[email protected]>
 ---
 src/unshar.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 diff --git a/src/unshar.c b/src/unshar.c
 index 80bc3a9..0fc3773 100644
 --- a/src/unshar.c
 +++ b/src/unshar.c
@@ -240,7 +240,7 @@ find_archive (char const * name, FILE * file, off_t start)
       off_t position = ftello (file);
       /* Read next line, fail if no more and no previous process.  */
 -      if (!fgets (rw_buffer, BUFSIZ, file))
 +      if (!fgets (rw_buffer, rw_base_size, file))
 	{
 	  if (!start)
 	    error (0, 0, _("Found no shell commands in %s"), name);
 -- 
 2.13.6
@@ -0,0 +1,97 @@
 From ec4ceb632abc0d54061269bc779459e13172f264 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <[email protected]>
 Date: Thu, 23 Jan 2020 15:42:41 +0100
 Subject: [PATCH 1/2] Fix building with GCC 10
 MIME-Version: 1.0
 Content-Type: text/plain; charset=UTF-8
 Content-Transfer-Encoding: 8bit
 GCC 10 defaults to -fno-common that results into errors on multiple
 global variable definitions:
 /usr/lib64/gcc/x86_64-suse-linux/9/../../../../x86_64-suse-linux/bin/ld:
 shar-opts.o:(.data.rel.ro.local+0x0): multiple definition of
 `program_name'; shar.o:(.rodata+0x10): first defined here
 This patch fixes it by changing the definitions in header files into extern
 declarations.
 <https://lists.gnu.org/archive/html/bug-gnu-utils/2020-01/msg00001.html>
 Signed-off-by: Petr Písař <[email protected]>
 ---
 src/shar-opts.h     | 2 +-
 src/shar-std.def    | 2 +-
 src/unshar-opts.h   | 2 +-
 src/uudecode-opts.h | 2 +-
 src/uuencode-opts.h | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)
 diff --git a/src/shar-opts.h b/src/shar-opts.h
 index 75dcae2..5055d1c 100644
 --- a/src/shar-opts.h
 +++ b/src/shar-opts.h
@@ -352,7 +352,7 @@ extern "C" {
  *  global exported definitions
  */
 #include "local.h"
 -char const * const program_name;
 +extern char const * const program_name;
 extern bool initialization_done;
 extern int optidx;
 diff --git a/src/shar-std.def b/src/shar-std.def
 index ed06b77..a28f61c 100644
 --- a/src/shar-std.def
 +++ b/src/shar-std.def
@@ -41,7 +41,7 @@ no-misuse-usage;
 usage-message;
 die-code;
 -export  = '#include "local.h"'"\nchar const * const program_name;";
 +export  = '#include "local.h"'"\nextern char const * const program_name;";
 #shell
 echo "include = 'char const * const program_name = \"${progname}\";';"
 diff --git a/src/unshar-opts.h b/src/unshar-opts.h
 index 2c3febe..9ebe2fc 100644
 --- a/src/unshar-opts.h
 +++ b/src/unshar-opts.h
@@ -192,7 +192,7 @@ extern "C" {
 extern size_t       separator_str_len;
 #include "local.h"
 -char const * const program_name;
 +extern char const * const program_name;
 /* * * * * *
 diff --git a/src/uudecode-opts.h b/src/uudecode-opts.h
 index 29b3b5c..5494289 100644
 --- a/src/uudecode-opts.h
 +++ b/src/uudecode-opts.h
@@ -170,7 +170,7 @@ extern "C" {
  *  global exported definitions
  */
 #include "local.h"
 -char const * const program_name;
 +extern char const * const program_name;
 /* * * * * *
 diff --git a/src/uuencode-opts.h b/src/uuencode-opts.h
 index e71c9b8..d6ec03e 100644
 --- a/src/uuencode-opts.h
 +++ b/src/uuencode-opts.h
@@ -166,7 +166,7 @@ extern "C" {
  *  global exported definitions
  */
 #include "local.h"
 -char const * const program_name;
 +extern char const * const program_name;
 /* * * * * *
 -- 
 2.21.1
@@ -0,0 +1,210 @@
 From 17788304f96fca8b1b83e04ce6d99980027062b9 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <[email protected]>
 Date: Mon, 3 Mar 2025 17:58:11 +0100
 Subject: [PATCH 1/3] ISO C23: Backport stdbool.m4 from
 gnulib-devel-0-52.20230709git.fc42.noarch
 MIME-Version: 1.0
 Content-Type: text/plain; charset=UTF-8
 Content-Transfer-Encoding: 8bit
 The bundled gnulib check for stdbool.h did not account for ISO C23
 which provides its own false and true keywords. As a result stdbool.h
 presence was not correctly detected and libopts/compat/compat.h,
 bundled from AutoGen, failed to compile with GCC 15 which defaults to
 ISO C23:
    In file included from autoopts/project.h:30,
 		     from libopts.c:2:
    ./compat/compat.h:188:19: error: cannot use keyword ‘false’ as enumeration constant
      188 |    typedef enum { false = 0, true = 1 } _Bool;
 	  |                   ^~~~~
    ./compat/compat.h:188:19: note: ‘false’ is a keyword with ‘-std=c23’ onwards
    ./compat/compat.h:188:41: error: expected ‘;’, identifier or ‘(’ before ‘_Bool’
      188 |    typedef enum { false = 0, true = 1 } _Bool;
 	  |                                         ^~~~~
 Signed-off-by: Petr Písař <[email protected]>
 ---
 m4/stdbool.m4 | 129 +++++++++++++++++++++++++++++---------------------
 1 file changed, 74 insertions(+), 55 deletions(-)
 diff --git a/m4/stdbool.m4 b/m4/stdbool.m4
 index 7273b82..8e00e4a 100644
 --- a/m4/stdbool.m4
 +++ b/m4/stdbool.m4
@@ -1,27 +1,40 @@
 # Check for stdbool.h that conforms to C99.
 -dnl Copyright (C) 2002-2006, 2009-2015 Free Software Foundation, Inc.
 +dnl Copyright (C) 2002-2006, 2009-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 -#serial 5
 +#serial 10
 # Prepare for substituting <stdbool.h> if it is not supported.
 AC_DEFUN([AM_STDBOOL_H],
 [
   AC_REQUIRE([AC_CHECK_HEADER_STDBOOL])
 +  AC_REQUIRE([AC_CANONICAL_HOST])
 -  # Define two additional variables used in the Makefile substitution.
 -
 +  dnl On some platforms, <stdbool.h> does not exist or does not conform to C99.
 +  dnl On Solaris 10 with CC=cc CXX=CC, <stdbool.h> exists but is not usable
 +  dnl in C++ mode (and no <cstdbool> exists). In this case, we use our
 +  dnl replacement, also in C mode (for binary compatibility between C and C++).
   if test "$ac_cv_header_stdbool_h" = yes; then
 -    STDBOOL_H=''
 +    case "$host_os" in
 +      solaris*)
 +        if test -z "$GCC"; then
 +          GL_GENERATE_STDBOOL_H=true
 +        else
 +          GL_GENERATE_STDBOOL_H=false
 +        fi
 +        ;;
 +      *)
 +        GL_GENERATE_STDBOOL_H=false
 +        ;;
 +    esac
   else
 -    STDBOOL_H='stdbool.h'
 +    GL_GENERATE_STDBOOL_H=true
   fi
 -  AC_SUBST([STDBOOL_H])
 -  AM_CONDITIONAL([GL_GENERATE_STDBOOL_H], [test -n "$STDBOOL_H"])
 +  AM_CONDITIONAL([GL_GENERATE_STDBOOL_H], [test "$GL_GENERATE_STDBOOL_H" = "true"])
   if test "$ac_cv_type__Bool" = yes; then
     HAVE__BOOL=1
@@ -31,70 +44,76 @@ AC_DEFUN([AM_STDBOOL_H],
   AC_SUBST([HAVE__BOOL])
 ])
 -# AM_STDBOOL_H will be renamed to gl_STDBOOL_H in the future.
 -AC_DEFUN([gl_STDBOOL_H], [AM_STDBOOL_H])
 -
 -# This version of the macro is needed in autoconf <= 2.68.
 +m4_version_prereq([2.72], [], [
 AC_DEFUN([AC_CHECK_HEADER_STDBOOL],
 -  [AC_CACHE_CHECK([for stdbool.h that conforms to C99],
 +  [AC_CHECK_TYPES([_Bool])
 +   AC_CACHE_CHECK([for stdbool.h that conforms to C99 or later],
      [ac_cv_header_stdbool_h],
      [AC_COMPILE_IFELSE(
         [AC_LANG_PROGRAM(
 -           [[
 -             #include <stdbool.h>
 -             #ifndef bool
 -              "error: bool is not defined"
 +           [[#include <stdbool.h>
 +
 +             /* "true" and "false" should be usable in #if expressions and
 +                integer constant expressions, and "bool" should be a valid
 +                type name.
 +
 +                Although C99 requires bool, true, and false to be macros,
 +                C23 and C++11 overrule that, so do not test for that.
 +                Although C99 requires __bool_true_false_are_defined and
 +                _Bool, C23 says they are obsolescent, so do not require
 +                them.  */
 +
 +             #if !true
 +               #error "'true' is not true"
              #endif
 -             #ifndef false
 -              "error: false is not defined"
 +             #if true != 1
 +               #error "'true' is not equal to 1"
              #endif
 +             char b[true == 1 ? 1 : -1];
 +             char c[true];
 +
              #if false
 -              "error: false is not 0"
 +               #error "'false' is not false"
              #endif
 -             #ifndef true
 -              "error: true is not defined"
 -             #endif
 -             #if true != 1
 -              "error: true is not 1"
 -             #endif
 -             #ifndef __bool_true_false_are_defined
 -              "error: __bool_true_false_are_defined is not defined"
 +             #if false != 0
 +               #error "'false' is not equal to 0"
              #endif
 +             char d[false == 0 ? 1 : -1];
 +
 +             enum { e = false, f = true, g = false * true, h = true * 256 };
 +
 +             char i[(bool) 0.5 == true ? 1 : -1];
 +             char j[(bool) 0.0 == false ? 1 : -1];
 +             char k[sizeof (bool) > 0 ? 1 : -1];
 +
 +             struct sb { bool s: 1; bool t; } s;
 +             char l[sizeof s.t > 0 ? 1 : -1];
 -             struct s { _Bool s: 1; _Bool t; } s;
 -
 -             char a[true == 1 ? 1 : -1];
 -             char b[false == 0 ? 1 : -1];
 -             char c[__bool_true_false_are_defined == 1 ? 1 : -1];
 -             char d[(bool) 0.5 == true ? 1 : -1];
 -             /* See body of main program for 'e'.  */
 -             char f[(_Bool) 0.0 == false ? 1 : -1];
 -             char g[true];
 -             char h[sizeof (_Bool)];
 -             char i[sizeof s.t];
 -             enum { j = false, k = true, l = false * true, m = true * 256 };
              /* The following fails for
                 HP aC++/ANSI C B3910B A.05.55 [Dec 04 2003]. */
 -             _Bool n[m];
 -             char o[sizeof n == m * sizeof n[0] ? 1 : -1];
 -             char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];
 +             bool m[h];
 +             char n[sizeof m == h * sizeof m[0] ? 1 : -1];
 +             char o[-1 - (bool) 0 < 0 ? 1 : -1];
              /* Catch a bug in an HP-UX C compiler.  See
 -                http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
 -                http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161.html
 +                https://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
 +                https://lists.gnu.org/r/bug-coreutils/2005-11/msg00161.html
               */
 -             _Bool q = true;
 -             _Bool *pq = &q;
 +             bool p = true;
 +             bool *pp = &p;
            ]],
            [[
 -             bool e = &s;
 -             *pq |= q;
 -             *pq |= ! q;
 -             /* Refer to every declared value, to avoid compiler optimizations.  */
 -             return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !!j + !k + !!l
 -                     + !m + !n + !o + !p + !q + !pq);
 +             bool ps = &s;
 +             *pp |= p;
 +             *pp |= ! p;
 +
 +             /* Refer to every declared value, so they cannot be
 +                discarded as unused.  */
 +             return (!b + !c + !d + !e + !f + !g + !h + !i + !j + !k
 +                     + !l + !m + !n + !o + !p + !pp + !ps);
            ]])],
         [ac_cv_header_stdbool_h=yes],
         [ac_cv_header_stdbool_h=no])])
 -   AC_CHECK_TYPES([_Bool])
 -])
 +])# AC_CHECK_HEADER_STDBOOL
 +
 +]) # m4_version_prereq 2.72
 -- 
 2.48.1
@@ -0,0 +1,44 @@
 From c6b3af7a1e9119e08a640d9cd93dcb0c984149ee Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <[email protected]>
 Date: Wed, 5 Mar 2025 10:13:08 +0100
 Subject: [PATCH 2/3] ISO C23: Port getcwd.m4 to ISO C23
 MIME-Version: 1.0
 Content-Type: text/plain; charset=UTF-8
 Content-Transfer-Encoding: 8bit
 Some confgure tests failed because of function arguments missing from
 the prototypes:
    configure:16105: checking whether getcwd (NULL, 0) allocates memory for result
    configure:16162: gcc -o conftest -g -O2   conftest.c  >&5
    conftest.c:186:16: error: conflicting types for 'getcwd'; have 'char *(void)'
      186 |          char *getcwd ();
 	  |                ^~~~~~
    In file included from conftest.c:181:
    /usr/include/unistd.h:531:14: note: previous declaration of 'getcwd' with type 'char *(char *, size_t)'
 This patch fixes it.
 Maintainer is encouraged to rebase the m4 files to the latest gnulib.
 Signed-off-by: Petr Písař <[email protected]>
 ---
 m4/getcwd.m4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 diff --git a/m4/getcwd.m4 b/m4/getcwd.m4
 index b9fbcec..6f24b14 100644
 --- a/m4/getcwd.m4
 +++ b/m4/getcwd.m4
@@ -21,7 +21,7 @@ AC_DEFUN([gl_FUNC_GETCWD_NULL],
 #         include <direct.h>
 #        endif
 #        ifndef getcwd
 -         char *getcwd ();
 +         char *getcwd (char *buf, size_t size);
 #        endif
 ]], [[
 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
 -- 
 2.48.1
@@ -0,0 +1,132 @@
 From bd072f85a75568eee2ddd7466a041ad91f38f0ce Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <[email protected]>
 Date: Mon, 3 Mar 2025 18:06:08 +0100
 Subject: [PATCH 3/3] ISO C23: Port the code to ISO C23
 MIME-Version: 1.0
 Content-Type: text/plain; charset=UTF-8
 Content-Transfer-Encoding: 8bit
 With GCC 15, which defaults to ISO 23, a build failed, for example like
 this:
    gcc -DLOCALEDIR=\"/usr/local/share/locale\" -DHAVE_CONFIG_H -I. -I..  -I../libopts -I. -I.. -I../lib -I
    ../lib -I../intl  -Wno-format-contains-nul -g -O2 -Wno-format-contains-nul -c -o shar.o shar.c
    In file included from local.h:23,
 		     from shar-opts.h:354,
 		     from shar.c:46:
    ../lib/system.h:78:7: error: conflicting types for ‘fdopen’; have ‘FILE *(void)’
       78 | FILE *fdopen ();
 	  |       ^~~~~~
 The cause is that ISO C23 changed a meaning of an empty argument list
 from an unspecified list to no arguments.
 Also K&R syntax is now deprecated and the compiler warned:
    encode.c: In function ‘write_encoded_bytes’:
    encode.c:33:1: warning: old-style function definition [-Wold-style-definition]
       33 | write_encoded_bytes (group, file)
 	  | ^~~~~~~~~~~~~~~~~~~
 This patch fixes both the erros and the warnigs by specifying all the
 arguments in the modern syntax.
 Signed-off-by: Petr Písař <[email protected]>
 ---
 lib/system.h   |  6 +++---
 src/encode.c   | 13 +++----------
 src/shar.c     |  2 +-
 src/uudecode.c |  2 +-
 4 files changed, 8 insertions(+), 15 deletions(-)
 diff --git a/lib/system.h b/lib/system.h
 index 2b9846b..811e8cf 100644
 --- a/lib/system.h
 +++ b/lib/system.h
@@ -52,7 +52,7 @@ typedef enum {false = 0, true = 1} bool;
 #endif
 #if !HAVE_DECL_STRTOIMAX && !defined strtoimax
 -intmax_t strtoimax ();
 +intmax_t strtoimax (const char *nptr, char **endptr, int base);
 #endif
 #if HAVE_STRING_H
@@ -75,8 +75,8 @@ intmax_t strtoimax ();
 # include <unistd.h>
 #endif
 -FILE *fdopen ();
 -FILE *popen ();
 +FILE *fdopen (int fd, const char *mode);
 +FILE *popen (const char *command, const char *type);
 /* Global functions of the shar package.  */
 diff --git a/src/encode.c b/src/encode.c
 index 09e0c69..b1de8bd 100644
 --- a/src/encode.c
 +++ b/src/encode.c
@@ -30,9 +30,7 @@
 `------------------------------------------*/
 static void
 -write_encoded_bytes (group, file)
 -     char *group;
 -     FILE *file;
 +write_encoded_bytes (char *group, FILE *file)
 {
   int c1, c2, c3, c4;
@@ -52,10 +50,7 @@ write_encoded_bytes (group, file)
 `--------------------------------------------------------------------*/
 static int
 -read_raw_bytes (file, buffer, buffer_size)
 -     FILE *file;
 -     char *buffer;
 -     int buffer_size;
 +read_raw_bytes (FILE *file, char *buffer, int buffer_size)
 {
   int character;
   int counter;
@@ -75,9 +70,7 @@ read_raw_bytes (file, buffer, buffer_size)
 `----------------------------------------------------*/
 void
 -copy_file_encoded (input, output)
 -     FILE *input;
 -     FILE *output;
 +copy_file_encoded (FILE *input, FILE *output)
 {
   char buffer[LINE_BUFFER_SIZE];
   int counter;
 diff --git a/src/shar.c b/src/shar.c
 index 6d7ed1d..2c6e2e1 100644
 --- a/src/shar.c
 +++ b/src/shar.c
@@ -109,7 +109,7 @@ static inline unsigned char to_uchar (char ch) { return ch; }
 #define IS_GRAPH(_c) (isprint (to_uchar (_c)) && !isspace (to_uchar (_c)))
 #endif
 -struct tm *localtime ();
 +struct tm *localtime (const time_t *timep);
 #if MSDOS
           /* 1 extra for CR.  */
 diff --git a/src/uudecode.c b/src/uudecode.c
 index 0621c99..b8a316e 100644
 --- a/src/uudecode.c
 +++ b/src/uudecode.c
@@ -82,7 +82,7 @@ static char const cright_years_z[] =
 #define UU_CHMOD(_n, _fd, _m)   chmod ((_n), UU_MODE_BITS(_m))
 #endif
 -struct passwd *getpwnam ();
 +struct passwd *getpwnam (const char *name);
 static uudecode_exit_code_t read_stduu(
         const char *inname, const char *outname);
 -- 
 2.48.1
@@ -0,0 +1,178 @@
 From 0e2f412eeec2e1f7f5743ea23c62bdf98bf4102c Mon Sep 17 00:00:00 2001
 From: Paul Eggert <[email protected]>
 Date: Thu, 8 Mar 2018 16:42:45 -0800
 Subject: [PATCH] fflush: adjust to glibc 2.28 libio.h removal
 MIME-Version: 1.0
 Content-Type: text/plain; charset=UTF-8
 Content-Transfer-Encoding: 8bit
 Petr Písař: Ported to sharutils-4.15.2 from:
 commit 4af4a4a71827c0bc5e0ec67af23edef4f15cee8e
 Author: Paul Eggert <[email protected]>
 Date:   Mon Mar 5 10:56:29 2018 -0800
    fflush: adjust to glibc 2.28 libio.h removal
 Problem reported by Daniel P. Berrangé in:
 https://lists.gnu.org/r/bug-gnulib/2018-03/msg00000.html
 * lib/fbufmode.c (fbufmode):
 * lib/fflush.c (clear_ungetc_buffer_preserving_position)
 (disable_seek_optimization, rpl_fflush):
 * lib/fpending.c (__fpending):
 * lib/fpurge.c (fpurge):
 * lib/freadable.c (freadable):
 * lib/freadahead.c (freadahead):
 * lib/freading.c (freading):
 * lib/freadptr.c (freadptr):
 * lib/freadseek.c (freadptrinc):
 * lib/fseeko.c (fseeko):
 * lib/fseterr.c (fseterr):
 * lib/fwritable.c (fwritable):
 * lib/fwriting.c (fwriting):
 Check _IO_EOF_SEEN instead of _IO_ftrylockfile.
 * lib/stdio-impl.h (_IO_IN_BACKUP) [_IO_EOF_SEEN]:
 Define if not already defined.
 commit 74d9d6a293d7462dea8f83e7fc5ac792e956a0ad
 Author: Paul Eggert <[email protected]>
 Date:   Thu Mar 8 16:42:45 2018 -0800
    fflush: be more paranoid about libio.h change
 Suggested by Eli Zaretskii in:
 https://lists.gnu.org/r/emacs-devel/2018-03/msg00270.html
 * lib/fbufmode.c (fbufmode):
 * lib/fflush.c (clear_ungetc_buffer_preserving_position)
 (disable_seek_optimization, rpl_fflush):
 * lib/fpending.c (__fpending):
 * lib/fpurge.c (fpurge):
 * lib/freadable.c (freadable):
 * lib/freadahead.c (freadahead):
 * lib/freading.c (freading):
 * lib/freadptr.c (freadptr):
 * lib/freadseek.c (freadptrinc):
 * lib/fseeko.c (fseeko):
 * lib/fseterr.c (fseterr):
 * lib/fwritable.c (fwritable):
 * lib/fwriting.c (fwriting):
 Look at _IO_ftrylockfile as well as at _IO_EOF_SEEN.
 This is needed for glibc-2.28 (First spotted with
 glibc-2.27.9000-13.fc29 on Fedora).
 Signed-off-by: Petr Písař <[email protected]>
 ---
 lib/fflush.c     | 9 ++++++---
 lib/fpurge.c     | 3 ++-
 lib/freading.c   | 3 ++-
 lib/fseeko.c     | 6 ++++--
 lib/stdio-impl.h | 6 ++++++
 5 files changed, 20 insertions(+), 7 deletions(-)
 diff --git a/lib/fflush.c b/lib/fflush.c
 index 5ae3e41..d887ecb 100644
 --- a/lib/fflush.c
 +++ b/lib/fflush.c
@@ -33,7 +33,8 @@
 #undef fflush
 -#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
 +#if defined _IO_EOF_SEEN || defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1
 +/* GNU libc, BeOS, Haiku, Linux libc5 */
 /* Clear the stream's ungetc buffer, preserving the value of ftello (fp).  */
 static void
@@ -72,7 +73,8 @@ clear_ungetc_buffer (FILE *fp)
 #endif
 -#if ! (defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */)
 +#if ! (defined _IO_EOF_SEEN || defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1)
 +/* GNU libc, BeOS, Haiku, Linux libc5 */
 # if (defined __sferror || defined __DragonFly__ || defined __ANDROID__) && defined __SNPT
 /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Android */
@@ -148,7 +150,8 @@ rpl_fflush (FILE *stream)
   if (stream == NULL || ! freading (stream))
     return fflush (stream);
 -#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
 +#if defined _IO_EOF_SEEN || defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1
 +  /* GNU libc, BeOS, Haiku, Linux libc5 */
   clear_ungetc_buffer_preserving_position (stream);
 diff --git a/lib/fpurge.c b/lib/fpurge.c
 index f313b22..a760c4d 100644
 --- a/lib/fpurge.c
 +++ b/lib/fpurge.c
@@ -62,7 +62,8 @@ fpurge (FILE *fp)
   /* Most systems provide FILE as a struct and the necessary bitmask in
      <stdio.h>, because they need it for implementing getc() and putc() as
      fast macros.  */
 -# if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
 +# if defined _IO_EOF_SEEN || defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1
 +  /* GNU libc, BeOS, Haiku, Linux libc5 */
   fp->_IO_read_end = fp->_IO_read_ptr;
   fp->_IO_write_ptr = fp->_IO_write_base;
   /* Avoid memory leak when there is an active ungetc buffer.  */
 diff --git a/lib/freading.c b/lib/freading.c
 index 0512b19..2341577 100644
 --- a/lib/freading.c
 +++ b/lib/freading.c
@@ -31,7 +31,8 @@ freading (FILE *fp)
   /* Most systems provide FILE as a struct and the necessary bitmask in
      <stdio.h>, because they need it for implementing getc() and putc() as
      fast macros.  */
 -# if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
 +# if defined _IO_EOF_SEEN || defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1
 +  /* GNU libc, BeOS, Haiku, Linux libc5 */
   return ((fp->_flags & _IO_NO_WRITES) != 0
           || ((fp->_flags & (_IO_NO_READS | _IO_CURRENTLY_PUTTING)) == 0
               && fp->_IO_read_base != NULL));
 diff --git a/lib/fseeko.c b/lib/fseeko.c
 index 1c65d2a..1b1cc2f 100644
 --- a/lib/fseeko.c
 +++ b/lib/fseeko.c
@@ -47,7 +47,8 @@ fseeko (FILE *fp, off_t offset, int whence)
 #endif
   /* These tests are based on fpurge.c.  */
 -#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
 +#if defined _IO_EOF_SEEN || defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1
 +  /* GNU libc, BeOS, Haiku, Linux libc5 */
   if (fp->_IO_read_end == fp->_IO_read_ptr
       && fp->_IO_write_ptr == fp->_IO_write_base
       && fp->_IO_save_base == NULL)
@@ -123,7 +124,8 @@ fseeko (FILE *fp, off_t offset, int whence)
           return -1;
         }
 -#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
 +#if defined _IO_EOF_SEEN || defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1
 +      /* GNU libc, BeOS, Haiku, Linux libc5 */
       fp->_flags &= ~_IO_EOF_SEEN;
       fp->_offset = pos;
 #elif defined __sferror || defined __DragonFly__ || defined __ANDROID__
 diff --git a/lib/stdio-impl.h b/lib/stdio-impl.h
 index 502d891..ea38ee2 100644
 --- a/lib/stdio-impl.h
 +++ b/lib/stdio-impl.h
@@ -18,6 +18,12 @@
    the same implementation of stdio extension API, except that some fields
    have different naming conventions, or their access requires some casts.  */
 +/* Glibc 2.28 made _IO_IN_BACKUP private.  For now, work around this
 +   problem by defining it ourselves.  FIXME: Do not rely on glibc
 +   internals.  */
 +#if !defined _IO_IN_BACKUP && defined _IO_EOF_SEEN
 +# define _IO_IN_BACKUP 0x100
 +#endif
 /* BSD stdio derived implementations.  */
 -- 
 2.14.3
@@ -0,0 +1,42 @@
 # This is the source.sh script. It is executed by BPM in a temporary directory when compiling a source package
 # BPM Expects the source code to be extracted into the automatically created 'source' directory which can be accessed using $BPM_SOURCE
 # BPM Expects the output files to be present in the automatically created 'output' directory which can be accessed using $BPM_OUTPUT
 DOWNLOAD="https://ftp.gnu.org/gnu/sharutils/sharutils-${BPM_PKG_VERSION}.tar.xz"
 FILENAME="${DOWNLOAD##*/}"
 # The prepare function is executed in the root of the temp directory
 # This function is used for downloading files and putting them into the correct location
 prepare() {
  wget "$DOWNLOAD"
  tar -xvf "$FILENAME" --strip-components=1 -C "$BPM_SOURCE"
  cd "$BPM_SOURCE"
  # Apply all patches
  for patch in "$BPM_WORKDIR"/*.patch; do
    patch -Np1 -i "$patch"
  done
  autoreconf -fiv
 }
 # The build function is executed in the source directory
 # This function is used to compile the source code
 build() {
  ./configure --prefix=/usr --disable-dependency-tracking
  make
 }
 # The check function is executed in the source directory
 # This function is used to run tests to verify the package has been compiled correctly
 check() {
  make check
 }
 # The package function is executed in the source directory
 # This function is used to move the compiled files into the output directory
 package() {
  make DESTDIR="$BPM_OUTPUT" install
  # Install package license
  install -Dm644 "$BPM_SOURCE"/COPYING "$BPM_OUTPUT"/usr/share/licenses/sharutils/COPYING
 }