add the output of bootstrapbaserock/bootstrap-pass2baserock/bootstrap

1 files changed, 355 insertions, 0 deletions

diff --git a/lib/backupfile.c b/lib/backupfile.c
new file mode 100644
index 0000000..8633065
--- /dev/null
+++ b/lib/backupfile.c
@@ -0,0 +1,355 @@
+/* backupfile.c -- make Emacs style backup file names
+
+   Copyright (C) 1990-2006, 2009-2011 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert and David MacKenzie.
+   Some algorithms adapted from GNU Emacs.  */
+
+#include <config.h>
+
+#include "backupfile.h"
+
+#include "argmatch.h"
+#include "dirname.h"
+#include "xalloc.h"
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <limits.h>
+
+#include <unistd.h>
+
+#include "dirent--.h"
+#ifndef _D_EXACT_NAMLEN
+# define _D_EXACT_NAMLEN(dp) strlen ((dp)->d_name)
+#endif
+#if D_INO_IN_DIRENT
+# define REAL_DIR_ENTRY(dp) ((dp)->d_ino != 0)
+#else
+# define REAL_DIR_ENTRY(dp) 1
+#endif
+
+#if ! (HAVE_PATHCONF && defined _PC_NAME_MAX)
+# define pathconf(file, option) (errno = -1)
+#endif
+
+#ifndef _POSIX_NAME_MAX
+# define _POSIX_NAME_MAX 14
+#endif
+#ifndef SIZE_MAX
+# define SIZE_MAX ((size_t) -1)
+#endif
+
+#if defined _XOPEN_NAME_MAX
+# define NAME_MAX_MINIMUM _XOPEN_NAME_MAX
+#else
+# define NAME_MAX_MINIMUM _POSIX_NAME_MAX
+#endif
+
+#ifndef HAVE_DOS_FILE_NAMES
+# define HAVE_DOS_FILE_NAMES 0
+#endif
+#ifndef HAVE_LONG_FILE_NAMES
+# define HAVE_LONG_FILE_NAMES 0
+#endif
+
+/* ISDIGIT differs from isdigit, as follows:
+   - Its arg may be any int or unsigned int; it need not be an unsigned char
+     or EOF.
+   - It's typically faster.
+   POSIX says that only '0' through '9' are digits.  Prefer ISDIGIT to
+   ISDIGIT unless it's important to use the locale's definition
+   of `digit' even when the host does not conform to POSIX.  */
+#define ISDIGIT(c) ((unsigned int) (c) - '0' <= 9)
+
+/* The extension added to file names to produce a simple (as opposed
+   to numbered) backup file name. */
+char const *simple_backup_suffix = "~";
+
+
+/* If FILE (which was of length FILELEN before an extension was
+   appended to it) is too long, replace the extension with the single
+   char E.  If the result is still too long, remove the char just
+   before E.  */
+
+static void
+check_extension (char *file, size_t filelen, char e)
+{
+  char *base = last_component (file);
+  size_t baselen = base_len (base);
+  size_t baselen_max = HAVE_LONG_FILE_NAMES ? 255 : NAME_MAX_MINIMUM;
+
+  if (HAVE_DOS_FILE_NAMES || NAME_MAX_MINIMUM < baselen)
+    {
+      /* The new base name is long enough to require a pathconf check.  */
+      long name_max;
+
+      /* Temporarily modify the buffer into its parent directory name,
+         invoke pathconf on the directory, and then restore the buffer.  */
+      char tmp[sizeof "."];
+      memcpy (tmp, base, sizeof ".");
+      strcpy (base, ".");
+      errno = 0;
+      name_max = pathconf (file, _PC_NAME_MAX);
+      if (0 <= name_max || errno == 0)
+        {
+          long size = baselen_max = name_max;
+          if (name_max != size)
+            baselen_max = SIZE_MAX;
+        }
+      memcpy (base, tmp, sizeof ".");
+    }
+
+  if (HAVE_DOS_FILE_NAMES && baselen_max <= 12)
+    {
+      /* Live within DOS's 8.3 limit.  */
+      char *dot = strchr (base, '.');
+      if (!dot)
+        baselen_max = 8;
+      else
+        {
+          char const *second_dot = strchr (dot + 1, '.');
+          baselen_max = (second_dot
+                         ? second_dot - base
+                         : dot + 1 - base + 3);
+        }
+    }
+
+  if (baselen_max < baselen)
+    {
+      baselen = file + filelen - base;
+      if (baselen_max <= baselen)
+        baselen = baselen_max - 1;
+      base[baselen] = e;
+      base[baselen + 1] = '\0';
+    }
+}
+
+/* Returned values for NUMBERED_BACKUP.  */
+
+enum numbered_backup_result
+  {
+    /* The new backup name is the same length as an existing backup
+       name, so it's valid for that directory.  */
+    BACKUP_IS_SAME_LENGTH,
+
+    /* Some backup names already exist, but the returned name is longer
+       than any of them, and its length should be checked.  */
+    BACKUP_IS_LONGER,
+
+    /* There are no existing backup names.  The new name's length
+       should be checked.  */
+    BACKUP_IS_NEW
+  };
+
+/* *BUFFER contains a file name.  Store into *BUFFER the next backup
+   name for the named file, with a version number greater than all the
+   existing numbered backups.  Reallocate *BUFFER as necessary; its
+   initial allocated size is BUFFER_SIZE, which must be at least 4
+   bytes longer than the file name to make room for the initially
+   appended ".~1".  FILELEN is the length of the original file name.
+   The returned value indicates what kind of backup was found.  If an
+   I/O or other read error occurs, use the highest backup number that
+   was found.  */
+
+static enum numbered_backup_result
+numbered_backup (char **buffer, size_t buffer_size, size_t filelen)
+{
+  enum numbered_backup_result result = BACKUP_IS_NEW;
+  DIR *dirp;
+  struct dirent *dp;
+  char *buf = *buffer;
+  size_t versionlenmax = 1;
+  char *base = last_component (buf);
+  size_t base_offset = base - buf;
+  size_t baselen = base_len (base);
+
+  /* Temporarily modify the buffer into its parent directory name,
+     open the directory, and then restore the buffer.  */
+  char tmp[sizeof "."];
+  memcpy (tmp, base, sizeof ".");
+  strcpy (base, ".");
+  dirp = opendir (buf);
+  memcpy (base, tmp, sizeof ".");
+  strcpy (base + baselen, ".~1~");
+
+  if (!dirp)
+    return result;
+
+  while ((dp = readdir (dirp)) != NULL)
+    {
+      char const *p;
+      char *q;
+      bool all_9s;
+      size_t versionlen;
+      size_t new_buflen;
+
+      if (! REAL_DIR_ENTRY (dp) || _D_EXACT_NAMLEN (dp) < baselen + 4)
+        continue;
+
+      if (memcmp (buf + base_offset, dp->d_name, baselen + 2) != 0)
+        continue;
+
+      p = dp->d_name + baselen + 2;
+
+      /* Check whether this file has a version number and if so,
+         whether it is larger.  Use string operations rather than
+         integer arithmetic, to avoid problems with integer overflow.  */
+
+      if (! ('1' <= *p && *p <= '9'))
+        continue;
+      all_9s = (*p == '9');
+      for (versionlen = 1; ISDIGIT (p[versionlen]); versionlen++)
+        all_9s &= (p[versionlen] == '9');
+
+      if (! (p[versionlen] == '~' && !p[versionlen + 1]
+             && (versionlenmax < versionlen
+                 || (versionlenmax == versionlen
+                     && memcmp (buf + filelen + 2, p, versionlen) <= 0))))
+        continue;
+
+      /* This directory has the largest version number seen so far.
+         Append this highest numbered extension to the file name,
+         prepending '0' to the number if it is all 9s.  */
+
+      versionlenmax = all_9s + versionlen;
+      result = (all_9s ? BACKUP_IS_LONGER : BACKUP_IS_SAME_LENGTH);
+      new_buflen = filelen + 2 + versionlenmax + 1;
+      if (buffer_size <= new_buflen)
+        {
+          buf = xnrealloc (buf, 2, new_buflen);
+          buffer_size = new_buflen * 2;
+        }
+      q = buf + filelen;
+      *q++ = '.';
+      *q++ = '~';
+      *q = '0';
+      q += all_9s;
+      memcpy (q, p, versionlen + 2);
+
+      /* Add 1 to the version number.  */
+
+      q += versionlen;
+      while (*--q == '9')
+        *q = '0';
+      ++*q;
+    }
+
+  closedir (dirp);
+  *buffer = buf;
+  return result;
+}
+
+/* Return the name of the new backup file for the existing file FILE,
+   allocated with malloc.  Report an error and fail if out of memory.
+   Do not call this function if backup_type == no_backups.  */
+
+char *
+find_backup_file_name (char const *file, enum backup_type backup_type)
+{
+  size_t filelen = strlen (file);
+  char *s;
+  size_t ssize;
+  bool simple = true;
+
+  /* Allow room for simple or ".~N~" backups.  The guess must be at
+     least sizeof ".~1~", but otherwise will be adjusted as needed.  */
+  size_t simple_backup_suffix_size = strlen (simple_backup_suffix) + 1;
+  size_t backup_suffix_size_guess = simple_backup_suffix_size;
+  enum { GUESS = sizeof ".~12345~" };
+  if (backup_suffix_size_guess < GUESS)
+    backup_suffix_size_guess = GUESS;
+
+  ssize = filelen + backup_suffix_size_guess + 1;
+  s = xmalloc (ssize);
+  memcpy (s, file, filelen + 1);
+
+  if (backup_type != simple_backups)
+    switch (numbered_backup (&s, ssize, filelen))
+      {
+      case BACKUP_IS_SAME_LENGTH:
+        return s;
+
+      case BACKUP_IS_LONGER:
+        simple = false;
+        break;
+
+      case BACKUP_IS_NEW:
+        simple = (backup_type == numbered_existing_backups);
+        break;
+      }
+
+  if (simple)
+    memcpy (s + filelen, simple_backup_suffix, simple_backup_suffix_size);
+  check_extension (s, filelen, '~');
+  return s;
+}
+
+static char const * const backup_args[] =
+{
+  /* In a series of synonyms, present the most meaningful first, so
+     that argmatch_valid be more readable. */
+  "none", "off",
+  "simple", "never",
+  "existing", "nil",
+  "numbered", "t",
+  NULL
+};
+
+static const enum backup_type backup_types[] =
+{
+  no_backups, no_backups,
+  simple_backups, simple_backups,
+  numbered_existing_backups, numbered_existing_backups,
+  numbered_backups, numbered_backups
+};
+
+/* Ensure that these two vectors have the same number of elements,
+   not counting the final NULL in the first one.  */
+ARGMATCH_VERIFY (backup_args, backup_types);
+
+/* Return the type of backup specified by VERSION.
+   If VERSION is NULL or the empty string, return numbered_existing_backups.
+   If VERSION is invalid or ambiguous, fail with a diagnostic appropriate
+   for the specified CONTEXT.  Unambiguous abbreviations are accepted.  */
+
+enum backup_type
+get_version (char const *context, char const *version)
+{
+  if (version == 0 || *version == 0)
+    return numbered_existing_backups;
+  else
+    return XARGMATCH (context, version, backup_args, backup_types);
+}
+
+
+/* Return the type of backup specified by VERSION.
+   If VERSION is NULL, use the value of the envvar VERSION_CONTROL.
+   If the specified string is invalid or ambiguous, fail with a diagnostic
+   appropriate for the specified CONTEXT.
+   Unambiguous abbreviations are accepted.  */
+
+enum backup_type
+xget_version (char const *context, char const *version)
+{
+  if (version && *version)
+    return get_version (context, version);
+  else
+    return get_version ("$VERSION_CONTROL", getenv ("VERSION_CONTROL"));
+}