/* GNU dump extensions to tar.
Copyright (C) 1988, 1992, 1993, 1994, 1996, 1997, 1999, 2000, 2001,
- 2003 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
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
- 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
-#include "system.h"
-#include <getline.h>
+#include <system.h>
#include <hash.h>
#include <quotearg.h>
#include "common.h"
-\f
-/* Variable sized generic character buffers. */
-struct accumulator
+/* Incremental dump specialities. */
+
+/* Which child files to save under a directory. */
+enum children
+ {
+ NO_CHILDREN,
+ CHANGED_CHILDREN,
+ ALL_CHILDREN
+ };
+
+#define DIRF_INIT 0x0001 /* directory structure is initialized
+ (procdir called at least once) */
+#define DIRF_NFS 0x0002 /* directory is mounted on nfs */
+#define DIRF_FOUND 0x0004 /* directory is found on fs */
+#define DIRF_NEW 0x0008 /* directory is new (not found
+ in the previous dump) */
+#define DIRF_RENAMED 0x0010 /* directory is renamed */
+
+#define DIR_IS_INITED(d) ((d)->flags & DIRF_INIT)
+#define DIR_IS_NFS(d) ((d)->flags & DIRF_NFS)
+#define DIR_IS_FOUND(d) ((d)->flags & DIRF_FOUND)
+#define DIR_IS_NEW(d) ((d)->flags & DIRF_NEW)
+#define DIR_IS_RENAMED(d) ((d)->flags & DIRF_RENAMED)
+
+#define DIR_SET_FLAG(d,f) (d)->flags |= (f)
+#define DIR_CLEAR_FLAG(d,f) (d)->flags &= ~(f)
+
+struct dumpdir /* Dump directory listing */
{
- size_t allocated;
- size_t length;
- char *pointer;
+ 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 */
};
-/* Amount of space guaranteed just after a reallocation. */
-#define ACCUMULATOR_SLACK 50
+/* 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 */
+ 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 */
+ const char *tagfile; /* Tag file, if the directory falls under
+ exclusion_tag_under */
+ char *name; /* file name of directory */
+ };
-/* Return the accumulated data from an ACCUMULATOR buffer. */
-static char *
-get_accumulator (struct accumulator *accumulator)
+struct dumpdir *
+dumpdir_create0 (const char *contents, const char *cmask)
{
- return accumulator->pointer;
+ 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;
}
-/* Allocate and return a new accumulator buffer. */
-static struct accumulator *
-new_accumulator (void)
+struct dumpdir *
+dumpdir_create (const char *contents)
{
- struct accumulator *accumulator
- = xmalloc (sizeof (struct accumulator));
+ return dumpdir_create0 (contents, "YND");
+}
- accumulator->allocated = ACCUMULATOR_SLACK;
- accumulator->pointer = xmalloc (ACCUMULATOR_SLACK);
- accumulator->length = 0;
- return accumulator;
+void
+dumpdir_free (struct dumpdir *dump)
+{
+ free (dump->elv);
+ free (dump);
}
-/* Deallocate an ACCUMULATOR buffer. */
-static void
-delete_accumulator (struct accumulator *accumulator)
+static int
+compare_dirnames (const void *first, const void *second)
{
- free (accumulator->pointer);
- free (accumulator);
+ char const *const *name1 = first;
+ char const *const *name2 = second;
+ return strcmp (*name1, *name2);
}
-/* At the end of an ACCUMULATOR buffer, add a DATA block of SIZE bytes. */
-static void
-add_to_accumulator (struct accumulator *accumulator,
- const char *data, size_t size)
+/* 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)
{
- if (accumulator->length + size > accumulator->allocated)
+ 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)
{
- accumulator->allocated = accumulator->length + size + ACCUMULATOR_SLACK;
- accumulator->pointer =
- xrealloc (accumulator->pointer, accumulator->allocated);
+ ret = itr->dump->elv[cur] - 1;
+ itr->next++;
}
- memcpy (accumulator->pointer + accumulator->length, data, size);
- accumulator->length += size;
+
+ return ret;
}
-\f
-/* Incremental dump specialities. */
-/* Which child files to save under a directory. */
-enum children {NO_CHILDREN, CHANGED_CHILDREN, ALL_CHILDREN};
+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);
+}
-/* Directory attributes. */
-struct directory
- {
- dev_t device_number; /* device number for directory */
- ino_t inode_number; /* inode number for directory */
- enum children children;
- bool nfs;
- bool found;
- char name[1]; /* path name of directory */
- };
+/* 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;
#if HAVE_ST_FSTYPE_STRING
static char const nfs_string[] = "nfs";
#endif
/* Calculate the hash of a directory. */
-static unsigned
-hash_directory (void const *entry, unsigned n_buckets)
+static size_t
+hash_directory_name (void const *entry, size_t n_buckets)
{
struct directory const *directory = entry;
return hash_string (directory->name, n_buckets);
}
-/* Compare two directories for equality. */
+/* Compare two directories for equality of their names. */
static bool
-compare_directories (void const *entry1, void const *entry2)
+compare_directory_names (void const *entry1, void const *entry2)
{
struct directory const *directory1 = entry1;
struct directory const *directory2 = entry2;
return strcmp (directory1->name, directory2->name) == 0;
}
+static size_t
+hash_directory_meta (void const *entry, size_t n_buckets)
+{
+ struct directory const *directory = entry;
+ /* FIXME: Work out a better algorytm */
+ return (directory->device_number + directory->inode_number) % n_buckets;
+}
+
+/* Compare two directories for equality of their device and inode numbers. */
+static bool
+compare_directory_meta (void const *entry1, void const *entry2)
+{
+ struct directory const *directory1 = entry1;
+ struct directory const *directory2 = entry2;
+ return directory1->device_number == directory2->device_number
+ && directory1->inode_number == directory2->inode_number;
+}
+
+/* Make a directory entry for given NAME */
+static struct directory *
+make_directory (const char *name)
+{
+ size_t namelen = strlen (name);
+ struct directory *directory = xmalloc (sizeof (*directory));
+ directory->next = NULL;
+ directory->dump = directory->idump = NULL;
+ directory->orig = NULL;
+ directory->flags = false;
+ 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, dev_t dev, ino_t ino, bool nfs, bool found)
+note_directory (char const *name, struct timespec mtime,
+ dev_t dev, ino_t ino, bool nfs, bool found,
+ const char *contents)
{
- size_t size = offsetof (struct directory, name) + strlen (name) + 1;
- struct directory *directory = xmalloc (size);
+ struct directory *directory = attach_directory (name);
+ directory->mtime = mtime;
directory->device_number = dev;
directory->inode_number = ino;
directory->children = CHANGED_CHILDREN;
- directory->nfs = nfs;
- directory->found = found;
- strcpy (directory->name, name);
+ if (nfs)
+ DIR_SET_FLAG (directory, DIRF_NFS);
+ if (found)
+ DIR_SET_FLAG (directory, DIRF_FOUND);
+ if (contents)
+ directory->dump = dumpdir_create (contents);
+ else
+ directory->dump = NULL;
if (! ((directory_table
- || (directory_table = hash_initialize (0, 0, hash_directory,
- compare_directories, 0)))
+ || (directory_table = hash_initialize (0, 0,
+ hash_directory_name,
+ compare_directory_names, 0)))
&& hash_insert (directory_table, directory)))
xalloc_die ();
+ if (! ((directory_meta_table
+ || (directory_meta_table = hash_initialize (0, 0,
+ hash_directory_meta,
+ compare_directory_meta,
+ 0)))
+ && hash_insert (directory_meta_table, directory)))
+ xalloc_die ();
+
return directory;
}
-/* Return a directory entry for a given path NAME, or zero if none found. */
+/* Return a directory entry for a given file NAME, or zero if none found. */
static struct directory *
-find_directory (char *name)
+find_directory (const char *name)
{
if (! directory_table)
return 0;
else
{
- size_t size = offsetof (struct directory, name) + strlen (name) + 1;
- struct directory *dir = alloca (size);
- strcpy (dir->name, name);
- return hash_lookup (directory_table, dir);
+ struct directory *dir = make_directory (name);
+ struct directory *ret = hash_lookup (directory_table, dir);
+ free_directory (dir);
+ return ret;
}
}
-static int
-compare_dirents (const void *first, const void *second)
+/* Return a directory entry for a given combination of device and inode
+ numbers, or zero if none found. */
+static struct directory *
+find_directory_meta (dev_t dev, ino_t ino)
{
- return strcmp ((*(char *const *) first) + 1,
- (*(char *const *) second) + 1);
+ if (! directory_meta_table)
+ return 0;
+ else
+ {
+ struct directory *dir = make_directory ("");
+ struct directory *ret;
+ dir->device_number = dev;
+ dir->inode_number = ino;
+ ret = hash_lookup (directory_meta_table, dir);
+ free_directory (dir);
+ return ret;
+ }
}
-char *
-get_directory_contents (char *path, dev_t device)
+void
+update_parent_directory (const char *name)
{
- struct accumulator *accumulator;
+ struct directory *directory;
+ char *p;
+
+ p = dir_name (name);
+ directory = find_directory (p);
+ if (directory)
+ {
+ struct stat st;
+ if (deref_stat (dereference_option, p, &st) != 0)
+ stat_diag (name);
+ else
+ directory->mtime = get_stat_mtime (&st);
+ }
+ free (p);
+}
- /* Recursively scan the given PATH. */
+#define PD_VERBOSE 0x10
+#define PD_FORCE_CHILDREN 0x20
+#define PD_CHILDREN(f) ((f) & 3)
- {
- char *dirp = savedir (path); /* for scanning directory */
- char const *entry; /* directory entry being scanned */
- size_t entrylen; /* length of directory entry */
- 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; /* for checking if already already seen */
- enum children children;
-
- if (! dirp)
- {
- if (ignore_failed_read_option)
- savedir_warn (path);
- else
- savedir_error (path);
- }
- errno = 0;
-
- name_buffer_size = strlen (path) + NAME_FIELD_SIZE;
- name_buffer = xmalloc (name_buffer_size + 2);
- strcpy (name_buffer, path);
- if (! ISSLASH (path[strlen (path) - 1]))
- strcat (name_buffer, "/");
- name_length = strlen (name_buffer);
-
- directory = find_directory (path);
- children = directory ? directory->children : CHANGED_CHILDREN;
-
- accumulator = new_accumulator ();
-
- if (dirp && children != NO_CHILDREN)
- for (entry = dirp;
- (entrylen = strlen (entry)) != 0;
- entry += entrylen + 1)
+static struct directory *
+procdir (char *name_buffer, struct stat *stat_data,
+ dev_t device,
+ int flag,
+ char *entry)
+{
+ struct directory *directory;
+ bool nfs = NFS_FILE_STAT (*stat_data);
+
+ if ((directory = find_directory (name_buffer)) != NULL)
+ {
+ if (DIR_IS_INITED (directory))
+ return directory;
+
+ /* With NFS, the same file can have two different devices
+ if an NFS directory is mounted in multiple locations,
+ which is relatively common when automounting.
+ To avoid spurious incremental redumping of
+ directories, consider all NFS devices as equal,
+ relying on the i-node to establish differences. */
+
+ if (! ((!check_device_option
+ || (DIR_IS_NFS (directory) && nfs)
+ || directory->device_number == stat_data->st_dev)
+ && directory->inode_number == stat_data->st_ino))
{
- if (name_buffer_size <= entrylen + name_length)
+ /* FIXME: find_directory_meta ignores nfs */
+ struct directory *d = find_directory_meta (stat_data->st_dev,
+ stat_data->st_ino);
+ if (d)
+ {
+ 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 (verbose_option)
+ WARN ((0, 0, _("%s: Directory has been renamed"),
+ quotearg_colon (name_buffer)));
+ directory->children = ALL_CHILDREN;
+ directory->device_number = stat_data->st_dev;
+ directory->inode_number = stat_data->st_ino;
+ }
+ if (nfs)
+ DIR_SET_FLAG (directory, DIRF_NFS);
+ }
+ else
+ directory->children = CHANGED_CHILDREN;
+
+ DIR_SET_FLAG (directory, DIRF_FOUND);
+ }
+ else
+ {
+ struct directory *d = find_directory_meta (stat_data->st_dev,
+ stat_data->st_ino);
+
+ directory = note_directory (name_buffer,
+ get_stat_mtime(stat_data),
+ stat_data->st_dev,
+ stat_data->st_ino,
+ nfs,
+ true,
+ NULL);
+
+ if (d)
+ {
+ if (strcmp (d->name, name_buffer))
+ {
+ if (flag & PD_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_NEW);
+ if (flag & PD_VERBOSE)
+ WARN ((0, 0, _("%s: Directory is new"),
+ quotearg_colon (name_buffer)));
+ directory->children =
+ (listed_incremental_option
+ || (OLDER_STAT_TIME (*stat_data, m)
+ || (after_date_option
+ && OLDER_STAT_TIME (*stat_data, c))))
+ ? ALL_CHILDREN
+ : CHANGED_CHILDREN;
+ }
+ }
+
+ /* If the directory is on another device and --one-file-system was given,
+ omit it... */
+ if (one_file_system_option && device != stat_data->st_dev
+ /* ... except if it was explicitely given in the command line */
+ && !is_individual_file (name_buffer))
+ directory->children = NO_CHILDREN;
+ else if (flag & PD_FORCE_CHILDREN)
+ {
+ directory->children = PD_CHILDREN(flag);
+ if (directory->children == NO_CHILDREN)
+ *entry = 'N';
+ }
+
+ DIR_SET_FLAG (directory, DIRF_INIT);
+
+ if (directory->children != NO_CHILDREN)
+ {
+ const char *tag_file_name;
+
+ switch (check_exclusion_tags (name_buffer, &tag_file_name))
+ {
+ 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;
+
+ case exclusion_tag_contents:
+ exclusion_tag_warning (name_buffer, tag_file_name,
+ _("contents not dumped"));
+ directory->children = NO_CHILDREN;
+ break;
+
+ case exclusion_tag_under:
+ exclusion_tag_warning (name_buffer, tag_file_name,
+ _("contents not dumped"));
+ directory->tagfile = tag_file_name;
+ break;
+
+ case exclusion_tag_none:
+ break;
+ }
+ }
+
+ return directory;
+}
+
+/* Compare dumpdir array from DIRECTORY with directory listing DIR and
+ build a new dumpdir template.
+
+ DIR must be returned by a previous call to savedir().
+
+ File names in DIRECTORY->dump->contents must be sorted
+ alphabetically.
+
+ DIRECTORY->dump is replaced with the created template. Each entry is
+ prefixed with ' ' if it was present in DUMP and with 'Y' otherwise. */
+
+void
+makedumpdir (struct directory *directory, const char *dir)
+{
+ size_t i,
+ dirsize, /* Number of elements in DIR */
+ len; /* Length of DIR, including terminating nul */
+ const char *p;
+ char const **array;
+ char *new_dump, *new_dump_ptr;
+ struct dumpdir *dump;
+
+ if (directory->children == ALL_CHILDREN)
+ dump = NULL;
+ else if (DIR_IS_RENAMED (directory))
+ dump = directory->orig->idump ?
+ directory->orig->idump : directory->orig->dump;
+ else
+ dump = directory->dump;
+
+ /* Count the size of DIR and the number of elements it contains */
+ dirsize = 0;
+ len = 0;
+ for (p = dir; *p; p += strlen (p) + 1, dirsize++)
+ len += strlen (p) + 2;
+ len++;
+
+ /* Create a sorted directory listing */
+ array = xcalloc (dirsize, sizeof array[0]);
+ for (i = 0, p = dir; *p; p += strlen (p) + 1, i++)
+ array[i] = p;
+
+ qsort (array, dirsize, sizeof (array[0]), compare_dirnames);
+
+ /* Prepare space for new dumpdir */
+ new_dump = xmalloc (len);
+ new_dump_ptr = new_dump;
+
+ /* Fill in the dumpdir template */
+ for (i = 0; i < dirsize; i++)
+ {
+ const char *loc = dumpdir_locate (dump, array[i]);
+ if (loc)
+ {
+ 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 */
+
+ /* Copy the file name */
+ for (p = array[i]; (*new_dump_ptr++ = *p++); )
+ ;
+ }
+ *new_dump_ptr = 0;
+ directory->idump = directory->dump;
+ directory->dump = dumpdir_create0 (new_dump, NULL);
+ free (array);
+}
+
+/* Recursively scan the given directory. */
+static const char *
+scan_directory (char *dir, dev_t device)
+{
+ 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 stat stat_data;
+ struct directory *directory;
+
+ if (! dirp)
+ savedir_error (dir);
+
+ name_buffer_size = strlen (dir) + NAME_FIELD_SIZE;
+ name_buffer = xmalloc (name_buffer_size + 2);
+ strcpy (name_buffer, dir);
+ if (! ISSLASH (dir[strlen (dir) - 1]))
+ strcat (name_buffer, "/");
+ name_length = strlen (name_buffer);
+
+ if (deref_stat (dereference_option, name_buffer, &stat_data))
+ {
+ stat_diag (name_buffer);
+ /* FIXME: used to be
+ children = CHANGED_CHILDREN;
+ but changed to: */
+ free (name_buffer);
+ free (dirp);
+ return NULL;
+ }
+
+ directory = procdir (name_buffer, &stat_data, device, 0, NULL);
+
+ if (dirp && directory->children != NO_CHILDREN)
+ {
+ char *entry; /* directory entry being scanned */
+ size_t entrylen; /* length of directory entry */
+ dumpdir_iter_t itr;
+
+ makedumpdir (directory, dirp);
+
+ 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
name_buffer_size += NAME_FIELD_SIZE;
- while (name_buffer_size <= entrylen + name_length);
+ while (name_buffer_size <= entrylen - 1 + name_length);
name_buffer = xrealloc (name_buffer, name_buffer_size + 2);
}
- strcpy (name_buffer + name_length, entry);
+ strcpy (name_buffer + name_length, entry + 1);
- if (excluded_name (name_buffer))
- add_to_accumulator (accumulator, "N", 1);
+ if (*entry == 'I') /* Ignored entry */
+ *entry = 'N';
+ else if (excluded_name (name_buffer))
+ *entry = 'N';
else
{
- struct stat stat_data;
-
if (deref_stat (dereference_option, name_buffer, &stat_data))
{
- if (ignore_failed_read_option)
- stat_warn (name_buffer);
- else
- stat_error (name_buffer);
+ stat_diag (name_buffer);
+ *entry = 'N';
continue;
}
if (S_ISDIR (stat_data.st_mode))
{
- bool nfs = NFS_FILE_STAT (stat_data);
-
- if (directory = find_directory (name_buffer), directory)
- {
- /* With NFS, the same file can have two different devices
- if an NFS directory is mounted in multiple locations,
- which is relatively common when automounting.
- To avoid spurious incremental redumping of
- directories, consider all NFS devices as equal,
- relying on the i-node to establish differences. */
-
- if (! (((directory->nfs & nfs)
- || directory->device_number == stat_data.st_dev)
- && directory->inode_number == stat_data.st_ino))
- {
- if (verbose_option)
- WARN ((0, 0, _("%s: Directory has been renamed"),
- quotearg_colon (name_buffer)));
- directory->children = ALL_CHILDREN;
- directory->nfs = nfs;
- directory->device_number = stat_data.st_dev;
- directory->inode_number = stat_data.st_ino;
- }
- directory->found = 1;
- }
- else
- {
- if (verbose_option)
- WARN ((0, 0, _("%s: Directory is new"),
- quotearg_colon (name_buffer)));
- directory = note_directory (name_buffer,
- stat_data.st_dev,
- stat_data.st_ino, nfs, 1);
- directory->children =
- ((listed_incremental_option
- || newer_mtime_option <= stat_data.st_mtime
- || (after_date_option &&
- newer_ctime_option <= stat_data.st_ctime))
- ? ALL_CHILDREN
- : CHANGED_CHILDREN);
- }
-
- if (one_file_system_option && device != stat_data.st_dev)
- directory->children = NO_CHILDREN;
- else if (children == ALL_CHILDREN)
- directory->children = ALL_CHILDREN;
-
- add_to_accumulator (accumulator, "D", 1);
+ int pd_flag = (verbose_option ? PD_VERBOSE : 0);
+ if (!recursion_option)
+ pd_flag |= PD_FORCE_CHILDREN | NO_CHILDREN;
+ else if (directory->children == ALL_CHILDREN)
+ pd_flag |= PD_FORCE_CHILDREN | ALL_CHILDREN;
+ *entry = 'D';
+ procdir (name_buffer, &stat_data, device, pd_flag, entry);
}
else if (one_file_system_option && device != stat_data.st_dev)
- add_to_accumulator (accumulator, "N", 1);
+ *entry = 'N';
-#ifdef S_ISHIDDEN
- else if (S_ISHIDDEN (stat_data.st_mode))
- {
- add_to_accumulator (accumulator, "D", 1);
- add_to_accumulator (accumulator, entry, entrylen);
- add_to_accumulator (accumulator, "A", 2);
- continue;
- }
-#endif
+ else if (*entry == 'Y')
+ /* New entry, skip further checks */;
+ /* FIXME: if (S_ISHIDDEN (stat_data.st_mode))?? */
+
+ else if (OLDER_STAT_TIME (stat_data, m)
+ && (!after_date_option
+ || OLDER_STAT_TIME (stat_data, c)))
+ *entry = 'N';
else
- if (children == CHANGED_CHILDREN
- && stat_data.st_mtime < newer_mtime_option
- && (!after_date_option
- || stat_data.st_ctime < newer_ctime_option))
- add_to_accumulator (accumulator, "N", 1);
- else
- add_to_accumulator (accumulator, "Y", 1);
+ *entry = 'Y';
}
-
- add_to_accumulator (accumulator, entry, entrylen + 1);
}
+ free (itr);
+ }
- add_to_accumulator (accumulator, "\000\000", 2);
+ free (name_buffer);
+ if (dirp)
+ free (dirp);
- free (name_buffer);
- if (dirp)
- free (dirp);
- }
+ return directory->dump ? directory->dump->contents : NULL;
+}
- /* Sort the contents of the directory, now that we have it all. */
+const char *
+get_directory_contents (char *dir, dev_t device)
+{
+ return scan_directory (dir, device);
+}
- {
- char *pointer = get_accumulator (accumulator);
- size_t counter;
- char *cursor;
- char *buffer;
- char **array;
- char **array_cursor;
+\f
+static void
+obstack_code_rename (struct obstack *stk, char *from, char *to)
+{
+ char *s;
- counter = 0;
- for (cursor = pointer; *cursor; cursor += strlen (cursor) + 1)
- counter++;
+ s = from[0] == 0 ? from :
+ safer_name_suffix (from, false, absolute_names_option);
+ obstack_1grow (stk, 'R');
+ obstack_grow (stk, s, strlen (s) + 1);
- if (! counter)
- {
- delete_accumulator (accumulator);
- return 0;
- }
+ s = to[0] == 0 ? to:
+ safer_name_suffix (to, false, absolute_names_option);
+ obstack_1grow (stk, 'T');
+ obstack_grow (stk, s, strlen (s) + 1);
+}
- array = xmalloc (sizeof (char *) * (counter + 1));
+static void
+store_rename (struct directory *dir, struct obstack *stk)
+{
+ if (DIR_IS_RENAMED (dir))
+ {
+ struct directory *prev, *p;
- array_cursor = array;
- for (cursor = pointer; *cursor; cursor += strlen (cursor) + 1)
- *array_cursor++ = cursor;
- *array_cursor = 0;
+ /* 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
+ cleared in the `else' branch below */
+ for (prev = dir; prev && prev->orig != dir; prev = prev->orig)
+ DIR_CLEAR_FLAG (prev, DIRF_RENAMED);
- qsort (array, counter, sizeof (char *), compare_dirents);
+ if (prev == NULL)
+ {
+ for (p = dir; p && p->orig; p = p->orig)
+ obstack_code_rename (stk, p->orig->name, p->name);
+ }
+ else
+ {
+ char *temp_name;
- buffer = xmalloc (cursor - pointer + 2);
+ DIR_CLEAR_FLAG (prev, DIRF_RENAMED);
- cursor = buffer;
- for (array_cursor = array; *array_cursor; array_cursor++)
- {
- char *string = *array_cursor;
+ /* Break the cycle by using a temporary name for one of its
+ elements.
+ First, create a temp name stub entry. */
+ temp_name = dir_name (dir->name);
+ obstack_1grow (stk, 'X');
+ obstack_grow (stk, temp_name, strlen (temp_name) + 1);
- while ((*cursor++ = *string++))
- continue;
- }
- *cursor = '\0';
+ obstack_code_rename (stk, dir->name, "");
+
+ for (p = dir; p != prev; p = p->orig)
+ obstack_code_rename (stk, p->orig->name, p->name);
- delete_accumulator (accumulator);
- free (array);
- return buffer;
- }
+ obstack_code_rename (stk, "", prev->name);
+ }
+ }
}
+
+const char *
+append_incremental_renames (const char *dump)
+{
+ struct obstack stk;
+ size_t size;
+ struct directory *dp;
+
+ if (dirhead == NULL)
+ return dump;
+
+ obstack_init (&stk);
+ if (dump)
+ {
+ size = dumpdir_size (dump) - 1;
+ obstack_grow (&stk, dump, size);
+ }
+ else
+ size = 0;
+
+ for (dp = dirhead; dp; dp = dp->next)
+ store_rename (dp, &stk);
+
+ if (obstack_object_size (&stk) != size)
+ {
+ obstack_1grow (&stk, 0);
+ dump = obstack_finish (&stk);
+ }
+ else
+ obstack_free (&stk, NULL);
+ return dump;
+}
+
\f
+
static FILE *listed_incremental_stream;
+/* Version of incremental format snapshots (directory files) used by this
+ tar. Currently it is supposed to be a single decimal number. 0 means
+ incremental snapshots as per tar version before 1.15.2.
+
+ The current tar version supports incremental versions from
+ 0 up to TAR_INCREMENTAL_VERSION, inclusive.
+ It is able to create only snapshots of TAR_INCREMENTAL_VERSION */
+
+#define TAR_INCREMENTAL_VERSION 2
+
+/* Read incremental snapshot formats 0 and 1 */
+static void
+read_incr_db_01 (int version, const char *initbuf)
+{
+ int n;
+ uintmax_t u;
+ time_t sec;
+ long int nsec;
+ char *buf = 0;
+ size_t bufsize;
+ char *ebuf;
+ long lineno = 1;
+
+ if (version == 1)
+ {
+ if (getline (&buf, &bufsize, listed_incremental_stream) <= 0)
+ {
+ read_error (listed_incremental_option);
+ free (buf);
+ return;
+ }
+ ++lineno;
+ }
+ else
+ {
+ buf = strdup (initbuf);
+ bufsize = strlen (buf) + 1;
+ }
+
+ sec = TYPE_MINIMUM (time_t);
+ nsec = -1;
+ errno = 0;
+ u = strtoumax (buf, &ebuf, 10);
+ if (!errno && TYPE_MAXIMUM (time_t) < u)
+ errno = ERANGE;
+ if (errno || buf == ebuf)
+ ERROR ((0, errno, "%s:%ld: %s",
+ quotearg_colon (listed_incremental_option),
+ lineno,
+ _("Invalid time stamp")));
+ else
+ {
+ sec = u;
+
+ if (version == 1 && *ebuf)
+ {
+ char const *buf_ns = ebuf + 1;
+ errno = 0;
+ u = strtoumax (buf_ns, &ebuf, 10);
+ if (!errno && BILLION <= u)
+ errno = ERANGE;
+ if (errno || buf_ns == ebuf)
+ {
+ ERROR ((0, errno, "%s:%ld: %s",
+ quotearg_colon (listed_incremental_option),
+ lineno,
+ _("Invalid time stamp")));
+ sec = TYPE_MINIMUM (time_t);
+ }
+ else
+ nsec = u;
+ }
+ else
+ {
+ /* pre-1 incremental format does not contain nanoseconds */
+ nsec = 0;
+ }
+ }
+ newer_mtime_option.tv_sec = sec;
+ newer_mtime_option.tv_nsec = nsec;
+
+
+ while (0 < (n = getline (&buf, &bufsize, listed_incremental_stream)))
+ {
+ dev_t dev;
+ ino_t ino;
+ bool nfs = buf[0] == '+';
+ char *strp = buf + nfs;
+ struct timespec mtime;
+
+ lineno++;
+
+ if (buf[n - 1] == '\n')
+ buf[n - 1] = '\0';
+
+ if (version == 1)
+ {
+ errno = 0;
+ u = strtoumax (strp, &ebuf, 10);
+ if (!errno && TYPE_MAXIMUM (time_t) < u)
+ errno = ERANGE;
+ if (errno || strp == ebuf || *ebuf != ' ')
+ {
+ ERROR ((0, errno, "%s:%ld: %s",
+ quotearg_colon (listed_incremental_option), lineno,
+ _("Invalid modification time (seconds)")));
+ sec = (time_t) -1;
+ }
+ else
+ sec = u;
+ strp = ebuf;
+
+ errno = 0;
+ u = strtoumax (strp, &ebuf, 10);
+ if (!errno && BILLION <= u)
+ errno = ERANGE;
+ if (errno || strp == ebuf || *ebuf != ' ')
+ {
+ ERROR ((0, errno, "%s:%ld: %s",
+ quotearg_colon (listed_incremental_option), lineno,
+ _("Invalid modification time (nanoseconds)")));
+ nsec = -1;
+ }
+ else
+ nsec = u;
+ mtime.tv_sec = sec;
+ mtime.tv_nsec = nsec;
+ strp = ebuf;
+ }
+ else
+ memset (&mtime, 0, sizeof mtime);
+
+ errno = 0;
+ u = strtoumax (strp, &ebuf, 10);
+ if (!errno && TYPE_MAXIMUM (dev_t) < u)
+ errno = ERANGE;
+ if (errno || strp == ebuf || *ebuf != ' ')
+ {
+ ERROR ((0, errno, "%s:%ld: %s",
+ quotearg_colon (listed_incremental_option), lineno,
+ _("Invalid device number")));
+ dev = (dev_t) -1;
+ }
+ else
+ dev = u;
+ strp = ebuf;
+
+ errno = 0;
+ u = strtoumax (strp, &ebuf, 10);
+ if (!errno && TYPE_MAXIMUM (ino_t) < u)
+ errno = ERANGE;
+ if (errno || strp == ebuf || *ebuf != ' ')
+ {
+ ERROR ((0, errno, "%s:%ld: %s",
+ quotearg_colon (listed_incremental_option), lineno,
+ _("Invalid inode number")));
+ ino = (ino_t) -1;
+ }
+ else
+ ino = u;
+ strp = ebuf;
+
+ strp++;
+ unquote_string (strp);
+ note_directory (strp, mtime, dev, ino, nfs, false, NULL);
+ }
+ free (buf);
+}
+
+/* Read a nul-terminated string from FP and store it in STK.
+ Store the number of bytes read (including nul terminator) in PCOUNT.
+
+ Return the last character read or EOF on end of file. */
+static int
+read_obstack (FILE *fp, struct obstack *stk, size_t *pcount)
+{
+ int c;
+ size_t i;
+
+ for (i = 0, c = getc (fp); c != EOF && c != 0; c = getc (fp), i++)
+ obstack_1grow (stk, c);
+ obstack_1grow (stk, 0);
+
+ *pcount = i;
+ return c;
+}
+
+/* Read from file FP a nul-terminated string and convert it to
+ intmax_t. Return the resulting value in PVAL. Assume '-' has
+ already been read.
+
+ Throw a fatal error if the string cannot be converted or if the
+ converted value is less than MIN_VAL. */
+
+static void
+read_negative_num (FILE *fp, intmax_t min_val, intmax_t *pval)
+{
+ int c;
+ size_t i;
+ char buf[INT_BUFSIZE_BOUND (intmax_t)];
+ char *ep;
+ buf[0] = '-';
+
+ for (i = 1; ISDIGIT (c = getc (fp)); i++)
+ {
+ if (i == sizeof buf - 1)
+ FATAL_ERROR ((0, 0, _("Field too long while reading snapshot file")));
+ buf[i] = c;
+ }
+
+ if (c < 0)
+ {
+ if (ferror (fp))
+ FATAL_ERROR ((0, errno, _("Read error in snapshot file")));
+ else
+ FATAL_ERROR ((0, 0, _("Unexpected EOF in snapshot file")));
+ }
+
+ buf[i] = 0;
+ errno = 0;
+ *pval = strtoimax (buf, &ep, 10);
+ if (c || errno || *pval < min_val)
+ FATAL_ERROR ((0, errno, _("Unexpected field value in snapshot file")));
+}
+
+/* Read from file FP a nul-terminated string and convert it to
+ uintmax_t. Return the resulting value in PVAL. Assume C has
+ already been read.
+
+ Throw a fatal error if the string cannot be converted or if the
+ converted value exceeds MAX_VAL.
+
+ Return the last character read or EOF on end of file. */
+
+static int
+read_unsigned_num (int c, FILE *fp, uintmax_t max_val, uintmax_t *pval)
+{
+ size_t i;
+ char buf[UINTMAX_STRSIZE_BOUND], *ep;
+
+ for (i = 0; ISDIGIT (c); i++)
+ {
+ if (i == sizeof buf - 1)
+ FATAL_ERROR ((0, 0, _("Field too long while reading snapshot file")));
+ buf[i] = c;
+ c = getc (fp);
+ }
+
+ if (c < 0)
+ {
+ if (ferror (fp))
+ FATAL_ERROR ((0, errno, _("Read error in snapshot file")));
+ else if (i == 0)
+ return c;
+ else
+ FATAL_ERROR ((0, 0, _("Unexpected EOF in snapshot file")));
+ }
+
+ buf[i] = 0;
+ errno = 0;
+ *pval = strtoumax (buf, &ep, 10);
+ if (c || errno || max_val < *pval)
+ FATAL_ERROR ((0, errno, _("Unexpected field value in snapshot file")));
+ return c;
+}
+
+/* Read from file FP a nul-terminated string and convert it to
+ uintmax_t. Return the resulting value in PVAL.
+
+ Throw a fatal error if the string cannot be converted or if the
+ converted value exceeds MAX_VAL.
+
+ Return the last character read or EOF on end of file. */
+
+static int
+read_num (FILE *fp, uintmax_t max_val, uintmax_t *pval)
+{
+ return read_unsigned_num (getc (fp), fp, max_val, pval);
+}
+
+/* Read from FP two NUL-terminated strings representing a struct
+ timespec. Return the resulting value in PVAL.
+
+ Throw a fatal error if the string cannot be converted. */
+
+static void
+read_timespec (FILE *fp, struct timespec *pval)
+{
+ int c = getc (fp);
+ intmax_t i;
+ uintmax_t u;
+
+ if (c == '-')
+ {
+ read_negative_num (fp, TYPE_MINIMUM (time_t), &i);
+ c = 0;
+ pval->tv_sec = i;
+ }
+ else
+ {
+ c = read_unsigned_num (c, fp, TYPE_MAXIMUM (time_t), &u);
+ pval->tv_sec = u;
+ }
+
+ if (c || read_num (fp, BILLION - 1, &u))
+ FATAL_ERROR ((0, 0, "%s: %s",
+ quotearg_colon (listed_incremental_option),
+ _("Unexpected EOF in snapshot file")));
+ pval->tv_nsec = u;
+}
+
+/* Read incremental snapshot format 2 */
+static void
+read_incr_db_2 ()
+{
+ uintmax_t u;
+ struct obstack stk;
+
+ obstack_init (&stk);
+
+ read_timespec (listed_incremental_stream, &newer_mtime_option);
+
+ for (;;)
+ {
+ struct timespec mtime;
+ dev_t dev;
+ ino_t ino;
+ bool nfs;
+ char *name;
+ char *content;
+ size_t s;
+
+ if (read_num (listed_incremental_stream, 1, &u))
+ return; /* Normal return */
+
+ nfs = u;
+
+ read_timespec (listed_incremental_stream, &mtime);
+
+ if (read_num (listed_incremental_stream, TYPE_MAXIMUM (dev_t), &u))
+ break;
+ dev = u;
+
+ if (read_num (listed_incremental_stream, TYPE_MAXIMUM (ino_t), &u))
+ break;
+ ino = u;
+
+ if (read_obstack (listed_incremental_stream, &stk, &s))
+ break;
+
+ name = obstack_finish (&stk);
+
+ while (read_obstack (listed_incremental_stream, &stk, &s) == 0 && s > 1)
+ ;
+ if (getc (listed_incremental_stream) != 0)
+ FATAL_ERROR ((0, 0, "%s: %s",
+ quotearg_colon (listed_incremental_option),
+ _("Missing record terminator")));
+
+ content = obstack_finish (&stk);
+ note_directory (name, mtime, dev, ino, nfs, false, content);
+ obstack_free (&stk, content);
+ }
+ FATAL_ERROR ((0, 0, "%s: %s",
+ quotearg_colon (listed_incremental_option),
+ _("Unexpected EOF in snapshot file")));
+}
+
+/* Read incremental snapshot file (directory file).
+ If the file has older incremental version, make sure that it is processed
+ correctly and that tar will use the most conservative backup method among
+ possible alternatives (i.e. prefer ALL_CHILDREN over CHANGED_CHILDREN,
+ etc.) This ensures that the snapshots are updated to the recent version
+ without any loss of data. */
void
read_directory_file (void)
{
int fd;
- FILE *fp;
char *buf = 0;
size_t bufsize;
return;
}
- fp = fdopen (fd, "r+");
- if (! fp)
+ listed_incremental_stream = fdopen (fd, "r+");
+ if (! listed_incremental_stream)
{
open_error (listed_incremental_option);
close (fd);
return;
}
- listed_incremental_stream = fp;
-
- if (0 < getline (&buf, &bufsize, fp))
+ if (0 < getline (&buf, &bufsize, listed_incremental_stream))
{
char *ebuf;
- int n;
- long lineno = 1;
- unsigned long u = (errno = 0, strtoul (buf, &ebuf, 10));
- time_t t = u;
- if (buf == ebuf || (u == 0 && errno == EINVAL))
- ERROR ((0, 0, "%s:1: %s", quotearg_colon (listed_incremental_option),
- _("Invalid time stamp")));
- else if (t != u || (u == -1 && errno == ERANGE))
- ERROR ((0, 0, "%s:1: %s", quotearg_colon (listed_incremental_option),
- _("Time stamp out of range")));
- else
- newer_mtime_option = t;
+ uintmax_t incremental_version;
- while (0 < (n = getline (&buf, &bufsize, fp)))
+ if (strncmp (buf, PACKAGE_NAME, sizeof PACKAGE_NAME - 1) == 0)
{
- dev_t dev;
- ino_t ino;
- bool nfs = buf[0] == '+';
- char *strp = buf + nfs;
-
- lineno++;
-
- if (buf[n - 1] == '\n')
- buf[n - 1] = '\0';
-
- errno = 0;
- dev = u = strtoul (strp, &ebuf, 10);
- if (strp == ebuf || (u == 0 && errno == EINVAL))
- ERROR ((0, 0, "%s:%ld: %s",
- quotearg_colon (listed_incremental_option), lineno,
- _("Invalid device number")));
- else if (dev != u || (u == -1 && errno == ERANGE))
- ERROR ((0, 0, "%s:%ld: %s",
- quotearg_colon (listed_incremental_option), lineno,
- _("Device number out of range")));
- strp = ebuf;
-
- errno = 0;
- ino = u = strtoul (strp, &ebuf, 10);
- if (strp == ebuf || (u == 0 && errno == EINVAL))
- ERROR ((0, 0, "%s:%ld: %s",
- quotearg_colon (listed_incremental_option), lineno,
- _("Invalid inode number")));
- else if (ino != u || (u == -1 && errno == ERANGE))
- ERROR ((0, 0, "%s:%ld: %s",
- quotearg_colon (listed_incremental_option), lineno,
- _("Inode number out of range")));
- strp = ebuf;
+ ebuf = buf + sizeof PACKAGE_NAME - 1;
+ if (*ebuf++ != '-')
+ ERROR((1, 0, _("Bad incremental file format")));
+ for (; *ebuf != '-'; ebuf++)
+ if (!*ebuf)
+ ERROR((1, 0, _("Bad incremental file format")));
+
+ incremental_version = strtoumax (ebuf + 1, NULL, 10);
+ }
+ else
+ incremental_version = 0;
- strp++;
- unquote_string (strp);
- note_directory (strp, dev, ino, nfs, 0);
+ switch (incremental_version)
+ {
+ case 0:
+ case 1:
+ read_incr_db_01 (incremental_version, buf);
+ break;
+
+ case TAR_INCREMENTAL_VERSION:
+ read_incr_db_2 ();
+ break;
+
+ default:
+ ERROR ((1, 0, _("Unsupported incremental format version: %"PRIuMAX),
+ incremental_version));
}
+
}
- if (ferror (fp))
+ if (ferror (listed_incremental_stream))
read_error (listed_incremental_option);
if (buf)
free (buf);
struct directory const *directory = entry;
FILE *fp = data;
- if (directory->found)
+ if (DIR_IS_FOUND (directory))
{
- int e;
- char *str = quote_copy_string (directory->name);
- fprintf (fp, "+%lu %lu %s\n" + ! directory->nfs,
- (unsigned long) directory->device_number,
- (unsigned long) directory->inode_number,
- str ? str : directory->name);
- e = errno;
- if (str)
- free (str);
- errno = e;
+ char buf[UINTMAX_STRSIZE_BOUND];
+ char *s;
+
+ s = DIR_IS_NFS (directory) ? "1" : "0";
+ fwrite (s, 2, 1, fp);
+ s = (TYPE_SIGNED (time_t)
+ ? imaxtostr (directory->mtime.tv_sec, buf)
+ : umaxtostr (directory->mtime.tv_sec, buf));
+ fwrite (s, strlen (s) + 1, 1, fp);
+ s = umaxtostr (directory->mtime.tv_nsec, buf);
+ fwrite (s, strlen (s) + 1, 1, fp);
+ s = umaxtostr (directory->device_number, buf);
+ fwrite (s, strlen (s) + 1, 1, fp);
+ s = umaxtostr (directory->inode_number, buf);
+ fwrite (s, strlen (s) + 1, 1, fp);
+
+ fwrite (directory->name, strlen (directory->name) + 1, 1, fp);
+ if (directory->dump)
+ {
+ 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);
}
return ! ferror (fp);
write_directory_file (void)
{
FILE *fp = listed_incremental_stream;
+ char buf[UINTMAX_STRSIZE_BOUND];
+ char *s;
if (! fp)
return;
if (fseek (fp, 0L, SEEK_SET) != 0)
seek_error (listed_incremental_option);
- if (ftruncate (fileno (fp), (off_t) 0) != 0)
+ if (sys_truncate (fileno (fp)) != 0)
truncate_error (listed_incremental_option);
- fprintf (fp, "%lu\n", (unsigned long) start_time);
+ fprintf (fp, "%s-%s-%d\n", PACKAGE_NAME, PACKAGE_VERSION,
+ TAR_INCREMENTAL_VERSION);
+
+ s = (TYPE_SIGNED (time_t)
+ ? imaxtostr (start_time.tv_sec, buf)
+ : umaxtostr (start_time.tv_sec, buf));
+ fwrite (s, strlen (s) + 1, 1, fp);
+ s = umaxtostr (start_time.tv_nsec, buf);
+ fwrite (s, strlen (s) + 1, 1, fp);
+
if (! ferror (fp) && directory_table)
hash_do_for_each (directory_table, write_directory_file_entry, fp);
+
if (ferror (fp))
write_error (listed_incremental_option);
if (fclose (fp) != 0)
close_error (listed_incremental_option);
}
+
\f
/* Restoration of incremental dumps. */
-void
-gnu_restore (char const *directory_name)
+static void
+get_gnu_dumpdir (struct tar_stat_info *stat_info)
{
- char *archive_dir;
- char *current_dir;
- char *cur, *arc;
size_t size;
size_t copied;
union block *data_block;
char *to;
+ char *archive_dir;
- current_dir = savedir (directory_name);
-
- if (!current_dir)
- {
- /* The directory doesn't exist now. It'll be created. In any
- case, we don't have to delete any files out of it. */
-
- skip_member ();
- return;
- }
+ size = stat_info->stat.st_size;
- size = current_stat_info.stat.st_size;
- if (size != current_stat_info.stat.st_size)
- xalloc_die ();
archive_dir = xmalloc (size);
to = archive_dir;
+
+ set_next_block_after (current_header);
+ mv_begin (stat_info);
+
for (; size > 0; size -= copied)
{
+ mv_size_left (size);
data_block = find_next_block ();
if (!data_block)
- {
- ERROR ((0, 0, _("Unexpected EOF in archive")));
- break; /* FIXME: What happens then? */
- }
+ ERROR ((1, 0, _("Unexpected EOF in archive")));
copied = available_space_after (data_block);
if (copied > size)
copied = size;
(data_block->buffer + copied - 1));
}
+ mv_end ();
+
+ stat_info->dumpdir = archive_dir;
+ stat_info->skipped = true; /* For skip_member() and friends
+ to work correctly */
+}
+
+/* Return T if STAT_INFO represents a dumpdir archive member.
+ Note: can invalidate current_header. It happens if flush_archive()
+ gets called within get_gnu_dumpdir() */
+bool
+is_dumpdir (struct tar_stat_info *stat_info)
+{
+ if (stat_info->is_dumpdir && !stat_info->dumpdir)
+ get_gnu_dumpdir (stat_info);
+ return stat_info->is_dumpdir;
+}
+
+static bool
+dumpdir_ok (char *dumpdir)
+{
+ char *p;
+ int has_tempdir = 0;
+ int expect = 0;
+
+ for (p = dumpdir; *p; p += strlen (p) + 1)
+ {
+ if (expect && *p != expect)
+ {
+ ERROR ((0, 0,
+ _("Malformed dumpdir: expected '%c' but found %#3o"),
+ expect, *p));
+ return false;
+ }
+ switch (*p)
+ {
+ case 'X':
+ if (has_tempdir)
+ {
+ ERROR ((0, 0,
+ _("Malformed dumpdir: 'X' duplicated")));
+ return false;
+ }
+ else
+ has_tempdir = 1;
+ break;
+
+ case 'R':
+ if (p[1] == 0)
+ {
+ if (!has_tempdir)
+ {
+ ERROR ((0, 0,
+ _("Malformed dumpdir: empty name in 'R'")));
+ return false;
+ }
+ else
+ has_tempdir = 0;
+ }
+ expect = 'T';
+ break;
+
+ case 'T':
+ if (expect != 'T')
+ {
+ ERROR ((0, 0,
+ _("Malformed dumpdir: 'T' not preceeded by 'R'")));
+ return false;
+ }
+ if (p[1] == 0 && !has_tempdir)
+ {
+ ERROR ((0, 0,
+ _("Malformed dumpdir: empty name in 'T'")));
+ return false;
+ }
+ expect = 0;
+ break;
+
+ case 'N':
+ case 'Y':
+ case 'D':
+ break;
+
+ default:
+ /* FIXME: bail out? */
+ break;
+ }
+ }
+
+ if (expect)
+ {
+ ERROR ((0, 0,
+ _("Malformed dumpdir: expected '%c' but found end of data"),
+ expect));
+ return false;
+ }
+
+ if (has_tempdir)
+ WARN ((0, 0, _("Malformed dumpdir: 'X' never used")));
+
+ return true;
+}
+
+/* Examine the directories under directory_name and delete any
+ files that were not there at the time of the back-up. */
+static bool
+try_purge_directory (char const *directory_name)
+{
+ char *current_dir;
+ char *cur, *arc, *p;
+ char *temp_stub = NULL;
+ struct dumpdir *dump;
+
+ if (!is_dumpdir (¤t_stat_info))
+ return false;
+
+ current_dir = savedir (directory_name);
+
+ if (!current_dir)
+ /* The directory doesn't exist now. It'll be created. In any
+ case, we don't have to delete any files out of it. */
+ return false;
+
+ /* Verify if dump directory is sane */
+ if (!dumpdir_ok (current_stat_info.dumpdir))
+ return false;
+
+ /* Process renames */
+ for (arc = current_stat_info.dumpdir; *arc; arc += strlen (arc) + 1)
+ {
+ if (*arc == 'X')
+ {
+#define TEMP_DIR_TEMPLATE "tar.XXXXXX"
+ size_t len = strlen (arc + 1);
+ temp_stub = xrealloc (temp_stub, len + 1 + sizeof TEMP_DIR_TEMPLATE);
+ memcpy (temp_stub, arc + 1, len);
+ temp_stub[len] = '/';
+ memcpy (temp_stub + len + 1, TEMP_DIR_TEMPLATE,
+ sizeof TEMP_DIR_TEMPLATE);
+ if (!mkdtemp (temp_stub))
+ {
+ ERROR ((0, errno,
+ _("Cannot create temporary directory using template %s"),
+ quote (temp_stub)));
+ free (temp_stub);
+ free (current_dir);
+ return false;
+ }
+ }
+ else if (*arc == 'R')
+ {
+ char *src, *dst;
+ src = arc + 1;
+ 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)
+ dst = temp_stub;
+
+ if (!rename_directory (src, dst))
+ {
+ free (temp_stub);
+ free (current_dir);
+ /* FIXME: Make sure purge_directory(dst) will return
+ immediately */
+ return false;
+ }
+ }
+ }
+
+ free (temp_stub);
+
+ /* Process deletes */
+ dump = dumpdir_create (current_stat_info.dumpdir);
+ p = NULL;
for (cur = current_dir; *cur; cur += strlen (cur) + 1)
{
- for (arc = archive_dir; *arc; arc += strlen (arc) + 1)
+ const char *entry;
+ struct stat st;
+ if (p)
+ free (p);
+ p = new_name (directory_name, cur);
+
+ if (deref_stat (false, p, &st))
{
- arc++;
- if (!strcmp (arc, cur))
- break;
+ if (errno != ENOENT) /* FIXME: Maybe keep a list of renamed
+ dirs and check it here? */
+ {
+ stat_diag (p);
+ WARN ((0, 0, _("%s: Not purging directory: unable to stat"),
+ quotearg_colon (p)));
+ }
+ continue;
}
- if (*arc == '\0')
+
+ if (!(entry = dumpdir_locate (dump, cur))
+ || (*entry == 'D' && !S_ISDIR (st.st_mode))
+ || (*entry == 'Y' && S_ISDIR (st.st_mode)))
{
- char *p = new_name (directory_name, cur);
+ if (one_file_system_option && st.st_dev != root_device)
+ {
+ WARN ((0, 0,
+ _("%s: directory is on a different device: not purging"),
+ quotearg_colon (p)));
+ continue;
+ }
+
if (! interactive_option || confirm ("delete", p))
{
if (verbose_option)
fprintf (stdlis, _("%s: Deleting %s\n"),
program_name, quote (p));
- if (! remove_any_file (p, 1))
+ if (! remove_any_file (p, RECURSIVE_REMOVE_OPTION))
{
int e = errno;
ERROR ((0, e, _("%s: Cannot remove"), quotearg_colon (p)));
}
}
- free (p);
}
-
}
+ free (p);
+ dumpdir_free (dump);
+
free (current_dir);
- free (archive_dir);
+ return true;
+}
+
+void
+purge_directory (char const *directory_name)
+{
+ if (!try_purge_directory (directory_name))
+ skip_member ();
+}
+
+void
+list_dumpdir (char *buffer, size_t size)
+{
+ int state = 0;
+ while (size)
+ {
+ switch (*buffer)
+ {
+ case 'Y':
+ case 'N':
+ case 'D':
+ case 'R':
+ case 'T':
+ case 'X':
+ fprintf (stdlis, "%c", *buffer);
+ if (state == 0)
+ {
+ fprintf (stdlis, " ");
+ state = 1;
+ }
+ buffer++;
+ size--;
+ break;
+
+ case 0:
+ fputc ('\n', stdlis);
+ buffer++;
+ size--;
+ state = 0;
+ break;
+
+ default:
+ fputc (*buffer, stdlis);
+ buffer++;
+ size--;
+ }
+ }
}
projects / chaz / tar / blobdiff