Adding upstream version 2.12.0.upstream/2.12.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 469 insertions, 0 deletions

diff --git a/gl/lib/canonicalize-lgpl.c b/gl/lib/canonicalize-lgpl.c
new file mode 100644
index 0000000..e701297
--- /dev/null
+++ b/gl/lib/canonicalize-lgpl.c
@@ -0,0 +1,469 @@
+/* Return the canonical absolute name of a given file.
+   Copyright (C) 1996-2023 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _LIBC
+/* Don't use __attribute__ __nonnull__ in this compilation unit.  Otherwise gcc
+   optimizes away the name == NULL test below.  */
+# define _GL_ARG_NONNULL(params)
+
+# include <libc-config.h>
+#endif
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <eloop-threshold.h>
+#include <filename.h>
+#include <idx.h>
+#include <intprops.h>
+#include <scratch_buffer.h>
+
+#ifdef _LIBC
+# include <shlib-compat.h>
+# define GCC_LINT 1
+# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+#else
+# define __canonicalize_file_name canonicalize_file_name
+# define __realpath realpath
+# define __strdup strdup
+# include "pathmax.h"
+# define __faccessat faccessat
+# if defined _WIN32 && !defined __CYGWIN__
+#  define __getcwd _getcwd
+# elif HAVE_GETCWD
+#  if IN_RELOCWRAPPER
+    /* When building the relocatable program wrapper, use the system's getcwd
+       function, not the gnulib override, otherwise we would get a link error.
+     */
+#   undef getcwd
+#  endif
+#  if defined VMS && !defined getcwd
+    /* We want the directory in Unix syntax, not in VMS syntax.
+       The gnulib override of 'getcwd' takes 2 arguments; the original VMS
+       'getcwd' takes 3 arguments.  */
+#   define __getcwd(buf, max) getcwd (buf, max, 0)
+#  else
+#   define __getcwd getcwd
+#  endif
+# else
+#  define __getcwd(buf, max) getwd (buf)
+# endif
+# define __mempcpy mempcpy
+# define __pathconf pathconf
+# define __rawmemchr rawmemchr
+# define __readlink readlink
+# if IN_RELOCWRAPPER
+    /* When building the relocatable program wrapper, use the system's memmove
+       function, not the gnulib override, otherwise we would get a link error.
+     */
+#  undef memmove
+# endif
+#endif
+
+/* Suppress bogus GCC -Wmaybe-uninitialized warnings.  */
+#if defined GCC_LINT || defined lint
+# define IF_LINT(Code) Code
+#else
+# define IF_LINT(Code) /* empty */
+#endif
+
+#ifndef DOUBLE_SLASH_IS_DISTINCT_ROOT
+# define DOUBLE_SLASH_IS_DISTINCT_ROOT false
+#endif
+
+#if defined _LIBC || !FUNC_REALPATH_WORKS
+
+/* Return true if FILE's existence can be shown, false (setting errno)
+   otherwise.  Follow symbolic links.  */
+static bool
+file_accessible (char const *file)
+{
+# if defined _LIBC || HAVE_FACCESSAT
+  return __faccessat (AT_FDCWD, file, F_OK, AT_EACCESS) == 0;
+# else
+  struct stat st;
+  return stat (file, &st) == 0 || errno == EOVERFLOW;
+# endif
+}
+
+/* True if concatenating END as a suffix to a file name means that the
+   code needs to check that the file name is that of a searchable
+   directory, since the canonicalize_filename_mode_stk code won't
+   check this later anyway when it checks an ordinary file name
+   component within END.  END must either be empty, or start with a
+   slash.  */
+
+static bool _GL_ATTRIBUTE_PURE
+suffix_requires_dir_check (char const *end)
+{
+  /* If END does not start with a slash, the suffix is OK.  */
+  while (ISSLASH (*end))
+    {
+      /* Two or more slashes act like a single slash.  */
+      do
+        end++;
+      while (ISSLASH (*end));
+
+      switch (*end++)
+        {
+        default: return false;  /* An ordinary file name component is OK.  */
+        case '\0': return true; /* Trailing "/" is trouble.  */
+        case '.': break;        /* Possibly "." or "..".  */
+        }
+      /* Trailing "/.", or "/.." even if not trailing, is trouble.  */
+      if (!*end || (*end == '.' && (!end[1] || ISSLASH (end[1]))))
+        return true;
+    }
+
+  return false;
+}
+
+/* Append this to a file name to test whether it is a searchable directory.
+   On POSIX platforms "/" suffices, but "/./" is sometimes needed on
+   macOS 10.13 <https://bugs.gnu.org/30350>, and should also work on
+   platforms like AIX 7.2 that need at least "/.".  */
+
+# if defined _LIBC || defined LSTAT_FOLLOWS_SLASHED_SYMLINK
+static char const dir_suffix[] = "/";
+# else
+static char const dir_suffix[] = "/./";
+# endif
+
+/* Return true if DIR is a searchable dir, false (setting errno) otherwise.
+   DIREND points to the NUL byte at the end of the DIR string.
+   Store garbage into DIREND[0 .. strlen (dir_suffix)].  */
+
+static bool
+dir_check (char *dir, char *dirend)
+{
+  strcpy (dirend, dir_suffix);
+  return file_accessible (dir);
+}
+
+static idx_t
+get_path_max (void)
+{
+# ifdef PATH_MAX
+  long int path_max = PATH_MAX;
+# else
+  /* The caller invoked realpath with a null RESOLVED, even though
+     PATH_MAX is not defined as a constant.  The glibc manual says
+     programs should not do this, and POSIX says the behavior is undefined.
+     Historically, glibc here used the result of pathconf, or 1024 if that
+     failed; stay consistent with this (dubious) historical practice.  */
+  int err = errno;
+  long int path_max = __pathconf ("/", _PC_PATH_MAX);
+  __set_errno (err);
+# endif
+  return path_max < 0 ? 1024 : path_max <= IDX_MAX ? path_max : IDX_MAX;
+}
+
+/* Scratch buffers used by realpath_stk and managed by __realpath.  */
+struct realpath_bufs
+{
+  struct scratch_buffer rname;
+  struct scratch_buffer extra;
+  struct scratch_buffer link;
+};
+
+static char *
+realpath_stk (const char *name, char *resolved, struct realpath_bufs *bufs)
+{
+  char *dest;
+  char const *start;
+  char const *end;
+  int num_links = 0;
+
+  if (name == NULL)
+    {
+      /* As per Single Unix Specification V2 we must return an error if
+         either parameter is a null pointer.  We extend this to allow
+         the RESOLVED parameter to be NULL in case the we are expected to
+         allocate the room for the return value.  */
+      __set_errno (EINVAL);
+      return NULL;
+    }
+
+  if (name[0] == '\0')
+    {
+      /* As per Single Unix Specification V2 we must return an error if
+         the name argument points to an empty string.  */
+      __set_errno (ENOENT);
+      return NULL;
+    }
+
+  char *rname = bufs->rname.data;
+  bool end_in_extra_buffer = false;
+  bool failed = true;
+
+  /* This is always zero for Posix hosts, but can be 2 for MS-Windows
+     and MS-DOS X:/foo/bar file names.  */
+  idx_t prefix_len = FILE_SYSTEM_PREFIX_LEN (name);
+
+  if (!IS_ABSOLUTE_FILE_NAME (name))
+    {
+      while (!__getcwd (bufs->rname.data, bufs->rname.length))
+        {
+          if (errno != ERANGE)
+            {
+              dest = rname;
+              goto error;
+            }
+          if (!scratch_buffer_grow (&bufs->rname))
+            return NULL;
+          rname = bufs->rname.data;
+        }
+      dest = __rawmemchr (rname, '\0');
+      start = name;
+      prefix_len = FILE_SYSTEM_PREFIX_LEN (rname);
+    }
+  else
+    {
+      dest = __mempcpy (rname, name, prefix_len);
+      *dest++ = '/';
+      if (DOUBLE_SLASH_IS_DISTINCT_ROOT)
+        {
+          if (prefix_len == 0 /* implies ISSLASH (name[0]) */
+              && ISSLASH (name[1]) && !ISSLASH (name[2]))
+            *dest++ = '/';
+          *dest = '\0';
+        }
+      start = name + prefix_len;
+    }
+
+  for ( ; *start; start = end)
+    {
+      /* Skip sequence of multiple file name separators.  */
+      while (ISSLASH (*start))
+        ++start;
+
+      /* Find end of component.  */
+      for (end = start; *end && !ISSLASH (*end); ++end)
+        /* Nothing.  */;
+
+      /* Length of this file name component; it can be zero if a file
+         name ends in '/'.  */
+      idx_t startlen = end - start;
+
+      if (startlen == 0)
+        break;
+      else if (startlen == 1 && start[0] == '.')
+        /* nothing */;
+      else if (startlen == 2 && start[0] == '.' && start[1] == '.')
+        {
+          /* Back up to previous component, ignore if at root already.  */
+          if (dest > rname + prefix_len + 1)
+            for (--dest; dest > rname && !ISSLASH (dest[-1]); --dest)
+              continue;
+          if (DOUBLE_SLASH_IS_DISTINCT_ROOT
+              && dest == rname + 1 && !prefix_len
+              && ISSLASH (*dest) && !ISSLASH (dest[1]))
+            dest++;
+        }
+      else
+        {
+          if (!ISSLASH (dest[-1]))
+            *dest++ = '/';
+
+          while (rname + bufs->rname.length - dest
+                 < startlen + sizeof dir_suffix)
+            {
+              idx_t dest_offset = dest - rname;
+              if (!scratch_buffer_grow_preserve (&bufs->rname))
+                return NULL;
+              rname = bufs->rname.data;
+              dest = rname + dest_offset;
+            }
+
+          dest = __mempcpy (dest, start, startlen);
+          *dest = '\0';
+
+          char *buf;
+          ssize_t n;
+          while (true)
+            {
+              buf = bufs->link.data;
+              idx_t bufsize = bufs->link.length;
+              n = __readlink (rname, buf, bufsize - 1);
+              if (n < bufsize - 1)
+                break;
+              if (!scratch_buffer_grow (&bufs->link))
+                return NULL;
+            }
+          if (0 <= n)
+            {
+              if (++num_links > __eloop_threshold ())
+                {
+                  __set_errno (ELOOP);
+                  goto error;
+                }
+
+              buf[n] = '\0';
+
+              char *extra_buf = bufs->extra.data;
+              idx_t end_idx IF_LINT (= 0);
+              if (end_in_extra_buffer)
+                end_idx = end - extra_buf;
+              size_t len = strlen (end);
+              if (INT_ADD_OVERFLOW (len, n))
+                {
+                  __set_errno (ENOMEM);
+                  return NULL;
+                }
+              while (bufs->extra.length <= len + n)
+                {
+                  if (!scratch_buffer_grow_preserve (&bufs->extra))
+                    return NULL;
+                  extra_buf = bufs->extra.data;
+                }
+              if (end_in_extra_buffer)
+                end = extra_buf + end_idx;
+
+              /* Careful here, end may be a pointer into extra_buf... */
+              memmove (&extra_buf[n], end, len + 1);
+              name = end = memcpy (extra_buf, buf, n);
+              end_in_extra_buffer = true;
+
+              if (IS_ABSOLUTE_FILE_NAME (buf))
+                {
+                  idx_t pfxlen = FILE_SYSTEM_PREFIX_LEN (buf);
+
+                  dest = __mempcpy (rname, buf, pfxlen);
+                  *dest++ = '/'; /* It's an absolute symlink */
+                  if (DOUBLE_SLASH_IS_DISTINCT_ROOT)
+                    {
+                      if (ISSLASH (buf[1]) && !ISSLASH (buf[2]) && !pfxlen)
+                        *dest++ = '/';
+                      *dest = '\0';
+                    }
+                  /* Install the new prefix to be in effect hereafter.  */
+                  prefix_len = pfxlen;
+                }
+              else
+                {
+                  /* Back up to previous component, ignore if at root
+                     already: */
+                  if (dest > rname + prefix_len + 1)
+                    for (--dest; dest > rname && !ISSLASH (dest[-1]); --dest)
+                      continue;
+                  if (DOUBLE_SLASH_IS_DISTINCT_ROOT && dest == rname + 1
+                      && ISSLASH (*dest) && !ISSLASH (dest[1]) && !prefix_len)
+                    dest++;
+                }
+            }
+          else if (! (suffix_requires_dir_check (end)
+                      ? dir_check (rname, dest)
+                      : errno == EINVAL))
+            goto error;
+        }
+    }
+  if (dest > rname + prefix_len + 1 && ISSLASH (dest[-1]))
+    --dest;
+  if (DOUBLE_SLASH_IS_DISTINCT_ROOT && dest == rname + 1 && !prefix_len
+      && ISSLASH (*dest) && !ISSLASH (dest[1]))
+    dest++;
+  failed = false;
+
+error:
+  *dest++ = '\0';
+  if (resolved != NULL)
+    {
+      /* Copy the full result on success or partial result if failure was due
+         to the path not existing or not being accessible.  */
+      if ((!failed || errno == ENOENT || errno == EACCES)
+          && dest - rname <= get_path_max ())
+        {
+          strcpy (resolved, rname);
+          if (failed)
+            return NULL;
+          else
+            return resolved;
+        }
+      if (!failed)
+        __set_errno (ENAMETOOLONG);
+      return NULL;
+    }
+  else
+    {
+      if (failed)
+        return NULL;
+      else
+        return __strdup (bufs->rname.data);
+    }
+}
+
+/* Return the canonical absolute name of file NAME.  A canonical name
+   does not contain any ".", ".." components nor any repeated file name
+   separators ('/') or symlinks.  All file name components must exist.  If
+   RESOLVED is null, the result is malloc'd; otherwise, if the
+   canonical name is PATH_MAX chars or more, returns null with 'errno'
+   set to ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
+   returns the name in RESOLVED.  If the name cannot be resolved and
+   RESOLVED is non-NULL, it contains the name of the first component
+   that cannot be resolved.  If the name can be resolved, RESOLVED
+   holds the same value as the value returned.  */
+
+char *
+__realpath (const char *name, char *resolved)
+{
+  struct realpath_bufs bufs;
+  scratch_buffer_init (&bufs.rname);
+  scratch_buffer_init (&bufs.extra);
+  scratch_buffer_init (&bufs.link);
+  char *result = realpath_stk (name, resolved, &bufs);
+  scratch_buffer_free (&bufs.link);
+  scratch_buffer_free (&bufs.extra);
+  scratch_buffer_free (&bufs.rname);
+  return result;
+}
+libc_hidden_def (__realpath)
+versioned_symbol (libc, __realpath, realpath, GLIBC_2_3);
+
+#endif /* defined _LIBC || !FUNC_REALPATH_WORKS */
+
+
+#if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3)
+char *
+attribute_compat_text_section
+__old_realpath (const char *name, char *resolved)
+{
+  if (resolved == NULL)
+    {
+      __set_errno (EINVAL);
+      return NULL;
+    }
+
+  return __realpath (name, resolved);
+}
+compat_symbol (libc, __old_realpath, realpath, GLIBC_2_0);
+#endif
+
+
+char *
+__canonicalize_file_name (const char *name)
+{
+  return __realpath (name, NULL);
+}
+weak_alias (__canonicalize_file_name, canonicalize_file_name)