/* GNU dump extensions to tar.
Copyright (C) 1988, 1992, 1993, 1994, 1996, 1997, 1999, 2000, 2001,
- 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+ 2003, 2004, 2005, 2006, 2007, 2008 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 2, or (at your option) any later
+ Free Software Foundation; either version 3, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#include <system.h>
-#include <getline.h>
#include <hash.h>
#include <quotearg.h>
#include "common.h"
#define DIR_SET_FLAG(d,f) (d)->flags |= (f)
#define DIR_CLEAR_FLAG(d,f) (d)->flags &= ~(f)
+struct dumpdir /* Dump directory listing */
+{
+ char *contents; /* Actual contents */
+ size_t total; /* Total number of elements */
+ size_t elc; /* Number of D/N/Y elements. */
+ char **elv; /* Array of D/N/Y elements */
+};
+
/* Directory attributes. */
struct directory
{
+ struct directory *next;
struct timespec mtime; /* Modification time */
dev_t device_number; /* device number for directory */
ino_t inode_number; /* inode number for directory */
- char *contents; /* Directory contents */
- char *icontents; /* Initial contents if the directory was
+ struct dumpdir *dump; /* Directory contents */
+ struct dumpdir *idump; /* Initial contents if the directory was
rescanned */
enum children children; /* What to save under this directory */
unsigned flags; /* See DIRF_ macros above */
struct directory *orig; /* If the directory was renamed, points to
the original directory structure */
- char name[1]; /* file name of directory */
+ const char *tagfile; /* Tag file, if the directory falls under
+ exclusion_tag_under */
+ char *name; /* file name of directory */
};
+struct dumpdir *
+dumpdir_create0 (const char *contents, const char *cmask)
+{
+ struct dumpdir *dump;
+ size_t i, total, ctsize, len;
+ char *p;
+ const char *q;
+
+ for (i = 0, total = 0, ctsize = 1, q = contents; *q; total++, q += len)
+ {
+ len = strlen (q) + 1;
+ ctsize += len;
+ if (!cmask || strchr (cmask, *q))
+ i++;
+ }
+ dump = xmalloc (sizeof (*dump) + ctsize);
+ dump->contents = (char*)(dump + 1);
+ memcpy (dump->contents, contents, ctsize);
+ dump->total = total;
+ dump->elc = i;
+ dump->elv = xcalloc (i + 1, sizeof (dump->elv[0]));
+
+ for (i = 0, p = dump->contents; *p; p += strlen (p) + 1)
+ {
+ if (!cmask || strchr (cmask, *p))
+ dump->elv[i++] = p + 1;
+ }
+ dump->elv[i] = NULL;
+ return dump;
+}
+
+struct dumpdir *
+dumpdir_create (const char *contents)
+{
+ return dumpdir_create0 (contents, "YND");
+}
+
+void
+dumpdir_free (struct dumpdir *dump)
+{
+ free (dump->elv);
+ free (dump);
+}
+
+static int
+compare_dirnames (const void *first, const void *second)
+{
+ char const *const *name1 = first;
+ char const *const *name2 = second;
+ return strcmp (*name1, *name2);
+}
+
+/* Locate NAME in the dumpdir array DUMP.
+ Return pointer to the slot in DUMP->contents, or NULL if not found */
+char *
+dumpdir_locate (struct dumpdir *dump, const char *name)
+{
+ char **ptr;
+ if (!dump)
+ return NULL;
+
+ ptr = bsearch (&name, dump->elv, dump->elc, sizeof (dump->elv[0]),
+ compare_dirnames);
+ return ptr ? *ptr - 1: NULL;
+}
+
+struct dumpdir_iter
+{
+ struct dumpdir *dump; /* Dumpdir being iterated */
+ int all; /* Iterate over all entries, not only D/N/Y */
+ size_t next; /* Index of the next element */
+};
+
+char *
+dumpdir_next (struct dumpdir_iter *itr)
+{
+ size_t cur = itr->next;
+ char *ret = NULL;
+
+ if (itr->all)
+ {
+ ret = itr->dump->contents + cur;
+ if (*ret == 0)
+ return NULL;
+ itr->next += strlen (ret) + 1;
+ }
+ else if (cur < itr->dump->elc)
+ {
+ ret = itr->dump->elv[cur] - 1;
+ itr->next++;
+ }
+
+ return ret;
+}
+
+char *
+dumpdir_first (struct dumpdir *dump, int all, struct dumpdir_iter **pitr)
+{
+ struct dumpdir_iter *itr = xmalloc (sizeof (*itr));
+ itr->dump = dump;
+ itr->all = all;
+ itr->next = 0;
+ *pitr = itr;
+ return dumpdir_next (itr);
+}
+
+/* Return size in bytes of the dumpdir array P */
+size_t
+dumpdir_size (const char *p)
+{
+ size_t totsize = 0;
+
+ while (*p)
+ {
+ size_t size = strlen (p) + 1;
+ totsize += size;
+ p += size;
+ }
+ return totsize + 1;
+}
+
+\f
+static struct directory *dirhead, *dirtail;
static Hash_table *directory_table;
static Hash_table *directory_meta_table;
make_directory (const char *name)
{
size_t namelen = strlen (name);
- size_t size = offsetof (struct directory, name) + namelen + 1;
- struct directory *directory = xmalloc (size);
- directory->contents = directory->icontents = NULL;
+ struct directory *directory = xmalloc (sizeof (*directory));
+ directory->next = NULL;
+ directory->dump = directory->idump = NULL;
directory->orig = NULL;
directory->flags = false;
- strcpy (directory->name, name);
- if (ISSLASH (directory->name[namelen-1]))
- directory->name[namelen-1] = 0;
+ if (namelen && ISSLASH (name[namelen - 1]))
+ namelen--;
+ directory->name = xmalloc (namelen + 1);
+ memcpy (directory->name, name, namelen);
+ directory->name[namelen] = 0;
+ directory->tagfile = NULL;
return directory;
}
+static void
+free_directory (struct directory *dir)
+{
+ free (dir->name);
+ free (dir);
+}
+
+static struct directory *
+attach_directory (const char *name)
+{
+ struct directory *dir = make_directory (name);
+ if (dirtail)
+ dirtail->next = dir;
+ else
+ dirhead = dir;
+ dirtail = dir;
+ return dir;
+}
+
+\f
+static void
+replace_prefix (char **pname, const char *samp, size_t slen,
+ const char *repl, size_t rlen)
+{
+ char *name = *pname;
+ size_t nlen = strlen (name);
+ if (nlen > slen && memcmp (name, samp, slen) == 0 && ISSLASH (name[slen]))
+ {
+ if (rlen > slen)
+ {
+ name = xrealloc (name, nlen - slen + rlen + 1);
+ *pname = name;
+ }
+ memmove (name + rlen, name + slen, nlen - slen + 1);
+ memcpy (name, repl, rlen);
+ }
+}
+
+void
+dirlist_replace_prefix (const char *pref, const char *repl)
+{
+ struct directory *dp;
+ size_t pref_len = strlen (pref);
+ size_t repl_len = strlen (repl);
+ for (dp = dirhead; dp; dp = dp->next)
+ replace_prefix (&dp->name, pref, pref_len, repl, repl_len);
+}
+
/* Create and link a new directory entry for directory NAME, having a
device number DEV and an inode number INO, with NFS indicating
whether it is an NFS device and FOUND indicating whether we have
found that the directory exists. */
static struct directory *
note_directory (char const *name, struct timespec mtime,
- dev_t dev, ino_t ino, bool nfs, bool found, char *contents)
+ dev_t dev, ino_t ino, bool nfs, bool found,
+ const char *contents)
{
- struct directory *directory = make_directory (name);
+ struct directory *directory = attach_directory (name);
directory->mtime = mtime;
directory->device_number = dev;
if (found)
DIR_SET_FLAG (directory, DIRF_FOUND);
if (contents)
- {
- size_t size = dumpdir_size (contents);
- directory->contents = xmalloc (size);
- memcpy (directory->contents, contents, size);
- }
+ directory->dump = dumpdir_create (contents);
else
- directory->contents = NULL;
+ directory->dump = NULL;
if (! ((directory_table
|| (directory_table = hash_initialize (0, 0,
{
struct directory *dir = make_directory (name);
struct directory *ret = hash_lookup (directory_table, dir);
- free (dir);
+ free_directory (dir);
return ret;
}
}
dir->device_number = dev;
dir->inode_number = ino;
ret = hash_lookup (directory_meta_table, dir);
- free (dir);
+ free_directory (dir);
return ret;
}
}
procdir (char *name_buffer, struct stat *stat_data,
dev_t device,
enum children children,
- bool verbose)
+ bool verbose,
+ char *entry)
{
struct directory *directory;
bool nfs = NFS_FILE_STAT (*stat_data);
directories, consider all NFS devices as equal,
relying on the i-node to establish differences. */
- if (! (((DIR_IS_NFS (directory) & nfs)
+ if (! ((!check_device_option
+ || (DIR_IS_NFS (directory) && nfs)
|| directory->device_number == stat_data->st_dev)
&& directory->inode_number == stat_data->st_ino))
{
stat_data->st_ino);
if (d)
{
- if (verbose_option)
- WARN ((0, 0, _("%s: Directory has been renamed from %s"),
- quotearg_colon (name_buffer),
- quote_n (1, d->name)));
- directory->orig = d;
- DIR_SET_FLAG (directory, DIRF_RENAMED);
+ if (strcmp (d->name, name_buffer))
+ {
+ if (verbose_option)
+ WARN ((0, 0, _("%s: Directory has been renamed from %s"),
+ quotearg_colon (name_buffer),
+ quote_n (1, d->name)));
+ directory->orig = d;
+ DIR_SET_FLAG (directory, DIRF_RENAMED);
+ dirlist_replace_prefix (d->name, name_buffer);
+ }
directory->children = CHANGED_CHILDREN;
}
else
if (d)
{
- if (verbose)
- WARN ((0, 0, _("%s: Directory has been renamed from %s"),
- quotearg_colon (name_buffer),
- quote_n (1, d->name)));
- directory->orig = d;
- DIR_SET_FLAG (directory, DIRF_RENAMED);
+ if (strcmp (d->name, name_buffer))
+ {
+ if (verbose)
+ WARN ((0, 0, _("%s: Directory has been renamed from %s"),
+ quotearg_colon (name_buffer),
+ quote_n (1, d->name)));
+ directory->orig = d;
+ DIR_SET_FLAG (directory, DIRF_RENAMED);
+ dirlist_replace_prefix (d->name, name_buffer);
+ }
directory->children = CHANGED_CHILDREN;
}
else
DIR_SET_FLAG (directory, DIRF_INIT);
- return directory;
-}
+ {
+ const char *tag_file_name;
-/* Locate NAME in the dumpdir array DUMP.
- Return pointer to the slot in the array, or NULL if not found */
-const char *
-dumpdir_locate (const char *dump, const char *name)
-{
- if (dump)
- while (*dump)
+ switch (check_exclusion_tags (name_buffer, &tag_file_name))
{
- /* Ignore 'R' (rename) and 'X' (tempname) entries, since they break
- alphabetical ordering.
- They normally do not occur in dumpdirs from the snapshot files,
- but this function is also used by purge_directory, which operates
- on a dumpdir from the archive, hence the need for this test. */
- if (!strchr ("RX", *dump))
- {
- int rc = strcmp (dump + 1, name);
- if (rc == 0)
- return dump;
- if (rc > 1)
- break;
- }
- dump += strlen (dump) + 1;
- }
- return NULL;
-}
+ case exclusion_tag_all:
+ /* This warning can be duplicated by code in dump_file0, but only
+ in case when the topmost directory being archived contains
+ an exclusion tag. */
+ exclusion_tag_warning (name_buffer, tag_file_name,
+ _("directory not dumped"));
+ if (entry)
+ *entry = 'N';
+ directory->children = NO_CHILDREN;
+ break;
-/* Return size in bytes of the dumpdir array P */
-size_t
-dumpdir_size (const char *p)
-{
- size_t totsize = 0;
+ case exclusion_tag_contents:
+ exclusion_tag_warning (name_buffer, tag_file_name,
+ _("contents not dumped"));
+ directory->children = NO_CHILDREN;
+ break;
- while (*p)
- {
- size_t size = strlen (p) + 1;
- totsize += size;
- p += size;
- }
- return totsize + 1;
-}
+ case exclusion_tag_under:
+ exclusion_tag_warning (name_buffer, tag_file_name,
+ _("contents not dumped"));
+ directory->tagfile = tag_file_name;
+ break;
-static int
-compare_dirnames (const void *first, const void *second)
-{
- return strcmp (*(const char**)first, *(const char**)second);
+ case exclusion_tag_none:
+ break;
+ }
+ }
+
+ return directory;
}
/* Compare dumpdir array from DIRECTORY with directory listing DIR and
DIR must be returned by a previous call to savedir().
- File names in DIRECTORY->contents must be sorted
+ File names in DIRECTORY->dump->contents must be sorted
alphabetically.
- DIRECTORY->contents is replaced with the created template. Each entry is
+ DIRECTORY->dump is replaced with the created template. Each entry is
prefixed with ' ' if it was present in DUMP and with 'Y' otherwise. */
void
const char *p;
char const **array;
char *new_dump, *new_dump_ptr;
- const char *dump;
+ struct dumpdir *dump;
if (directory->children == ALL_CHILDREN)
dump = NULL;
else if (DIR_IS_RENAMED (directory))
- dump = directory->orig->icontents ?
- directory->orig->icontents : directory->orig->contents;
+ dump = directory->orig->idump ?
+ directory->orig->idump : directory->orig->dump;
else
- dump = directory->contents;
+ dump = directory->dump;
/* Count the size of DIR and the number of elements it contains */
dirsize = 0;
const char *loc = dumpdir_locate (dump, array[i]);
if (loc)
{
- *new_dump_ptr++ = ' ';
- dump = loc + strlen (loc) + 1;
+ if (directory->tagfile)
+ *new_dump_ptr = strcmp (directory->tagfile, array[i]) == 0 ?
+ ' ' : 'I';
+ else
+ *new_dump_ptr = ' ';
+ new_dump_ptr++;
}
+ else if (directory->tagfile)
+ *new_dump_ptr++ = strcmp (directory->tagfile, array[i]) == 0 ?
+ ' ' : 'I';
else
*new_dump_ptr++ = 'Y'; /* New entry */
;
}
*new_dump_ptr = 0;
- directory->icontents = directory->contents;
- directory->contents = new_dump;
+ directory->idump = directory->dump;
+ directory->dump = dumpdir_create0 (new_dump, NULL);
free (array);
}
/* Recursively scan the given directory. */
-static char *
-scan_directory (char *dir_name, dev_t device)
+static const char *
+scan_directory (char *dir, dev_t device)
{
- char *dirp = savedir (dir_name); /* for scanning directory */
+ char *dirp = savedir (dir); /* for scanning directory */
char *name_buffer; /* directory, `/', and directory member */
size_t name_buffer_size; /* allocated size of name_buffer, minus 2 */
size_t name_length; /* used length in name_buffer */
struct directory *directory;
if (! dirp)
- savedir_error (dir_name);
+ savedir_error (dir);
- name_buffer_size = strlen (dir_name) + NAME_FIELD_SIZE;
+ name_buffer_size = strlen (dir) + NAME_FIELD_SIZE;
name_buffer = xmalloc (name_buffer_size + 2);
- strcpy (name_buffer, dir_name);
- if (! ISSLASH (dir_name[strlen (dir_name) - 1]))
+ strcpy (name_buffer, dir);
+ if (! ISSLASH (dir[strlen (dir) - 1]))
strcat (name_buffer, "/");
name_length = strlen (name_buffer);
return NULL;
}
- directory = procdir (name_buffer, &stat_data, device, NO_CHILDREN, false);
+ directory = procdir (name_buffer, &stat_data, device, NO_CHILDREN, false,
+ NULL);
if (dirp && directory->children != NO_CHILDREN)
{
- char *entry; /* directory entry being scanned */
+ char *entry; /* directory entry being scanned */
size_t entrylen; /* length of directory entry */
+ dumpdir_iter_t itr;
makedumpdir (directory, dirp);
- for (entry = directory->contents;
- (entrylen = strlen (entry)) != 0;
- entry += entrylen + 1)
+ for (entry = dumpdir_first (directory->dump, 1, &itr);
+ entry;
+ entry = dumpdir_next (itr))
{
+ entrylen = strlen (entry);
if (name_buffer_size <= entrylen - 1 + name_length)
{
do
}
strcpy (name_buffer + name_length, entry + 1);
- if (excluded_name (name_buffer))
+ if (*entry == 'I') /* Ignored entry */
+ *entry = 'N';
+ else if (excluded_name (name_buffer))
*entry = 'N';
else
{
if (S_ISDIR (stat_data.st_mode))
{
+ *entry = 'D';
procdir (name_buffer, &stat_data, device,
directory->children,
- verbose_option);
- *entry = 'D';
+ verbose_option, entry);
}
else if (one_file_system_option && device != stat_data.st_dev)
*entry = 'Y';
}
}
+ free (itr);
}
free (name_buffer);
if (dirp)
free (dirp);
- return directory->contents;
+ return directory->dump ? directory->dump->contents : NULL;
}
-char *
-get_directory_contents (char *dir_name, dev_t device)
+const char *
+get_directory_contents (char *dir, dev_t device)
{
- return scan_directory (dir_name, device);
+ return scan_directory (dir, device);
}
\f
static void
obstack_code_rename (struct obstack *stk, char *from, char *to)
{
+ char *s;
+
+ s = from[0] == 0 ? from :
+ safer_name_suffix (from, false, absolute_names_option);
obstack_1grow (stk, 'R');
- obstack_grow (stk, from, strlen (from) + 1);
+ obstack_grow (stk, s, strlen (s) + 1);
+
+ s = to[0] == 0 ? to:
+ safer_name_suffix (to, false, absolute_names_option);
obstack_1grow (stk, 'T');
- obstack_grow (stk, to, strlen (to) + 1);
+ obstack_grow (stk, s, strlen (s) + 1);
}
-static bool
-rename_handler (void *data, void *proc_data)
+static void
+store_rename (struct directory *dir, struct obstack *stk)
{
- struct directory *dir = data;
- struct obstack *stk = proc_data;
-
if (DIR_IS_RENAMED (dir))
{
struct directory *prev, *p;
- /* Detect eventual cycles and clear DIRF_RENAMED flag, so this entries
+ /* Detect eventual cycles and clear DIRF_RENAMED flag, so these entries
are ignored when hit by this function next time.
If the chain forms a cycle, prev points to the entry DIR is renamed
from. In this case it still retains DIRF_RENAMED flag, which will be
obstack_code_rename (stk, "", prev->name);
}
}
- return true;
}
const char *
{
struct obstack stk;
size_t size;
-
- if (directory_table == NULL)
+ struct directory *dp;
+
+ if (dirhead == NULL)
return dump;
obstack_init (&stk);
else
size = 0;
- hash_do_for_each (directory_table, rename_handler, &stk);
+ for (dp = dirhead; dp; dp = dp->next)
+ store_rename (dp, &stk);
+
if (obstack_object_size (&stk) != size)
{
obstack_1grow (&stk, 0);
fwrite (s, strlen (s) + 1, 1, fp);
fwrite (directory->name, strlen (directory->name) + 1, 1, fp);
- if (directory->contents)
+ if (directory->dump)
{
- char *p;
- for (p = directory->contents; *p; p += strlen (p) + 1)
- {
- if (strchr ("YND", *p))
- fwrite (p, strlen (p) + 1, 1, fp);
- }
+ const char *p;
+ dumpdir_iter_t itr;
+
+ for (p = dumpdir_first (directory->dump, 0, &itr);
+ p;
+ p = dumpdir_next (itr))
+ fwrite (p, strlen (p) + 1, 1, fp);
+ free (itr);
}
fwrite ("\0\0", 2, 1, fp);
}
char *current_dir;
char *cur, *arc, *p;
char *temp_stub = NULL;
+ struct dumpdir *dump;
if (!is_dumpdir (¤t_stat_info))
return false;
arc += strlen (arc) + 1;
dst = arc + 1;
+ /* Ensure that neither source nor destination are absolute file
+ names (unless permitted by -P option), and that they do not
+ contain dubious parts (e.g. ../).
+
+ This is an extra safety precaution. Besides, it might be
+ necessary to extract from archives created with tar versions
+ prior to 1.19. */
+
+ if (*src)
+ src = safer_name_suffix (src, false, absolute_names_option);
+ if (*dst)
+ dst = safer_name_suffix (dst, false, absolute_names_option);
+
if (*src == 0)
src = temp_stub;
else if (*dst == 0)
free (temp_stub);
/* Process deletes */
+ dump = dumpdir_create (current_stat_info.dumpdir);
p = NULL;
for (cur = current_dir; *cur; cur += strlen (cur) + 1)
{
continue;
}
- if (!(entry = dumpdir_locate (current_stat_info.dumpdir, cur))
+ if (!(entry = dumpdir_locate (dump, cur))
|| (*entry == 'D' && !S_ISDIR (st.st_mode))
|| (*entry == 'Y' && S_ISDIR (st.st_mode)))
{
}
}
free (p);
-
+ dumpdir_free (dump);
+
free (current_dir);
return true;
}
void
list_dumpdir (char *buffer, size_t size)
{
+ int state = 0;
while (size)
{
switch (*buffer)
case 'R':
case 'T':
case 'X':
- fprintf (stdlis, "%c ", *buffer);
+ fprintf (stdlis, "%c", *buffer);
+ if (state == 0)
+ {
+ fprintf (stdlis, " ");
+ state = 1;
+ }
buffer++;
size--;
break;
fputc ('\n', stdlis);
buffer++;
size--;
+ state = 0;
break;
default:
projects / chaz / tar / blobdiff