void
diff_archive (void)
{
struct stat stat_data;
int name_length;
int status;
errno = EPIPE; /* FIXME: errno should be read-only */
/* FIXME: remove perrors */
set_next_block_after (current_header);
decode_header (current_header, ¤t_stat, ¤t_format, 1);
/* Print the block from `current_header' and `current_stat'. */
if (verbose_option)
{
if (now_verifying)
fprintf (stdlis, _("Verify "));
print_header ();
}
switch (current_header->header.typeflag)
{
default:
WARN ((0, 0, _("Unknown file type '%c' for %s, diffed as normal file"),
current_header->header.typeflag, current_file_name));
/* Fall through. */
case AREGTYPE:
case REGTYPE:
case GNUTYPE_SPARSE:
case CONTTYPE:
/* Appears to be a file. See if it's really a directory. */
name_length = strlen (current_file_name) - 1;
if (current_file_name[name_length] == PATHSEP)
goto really_dir;
if (!get_stat_data (&stat_data))
{
if (current_header->oldgnu_header.isextended)
skip_extended_headers ();
skip_file ((long) current_stat.st_size);
goto quit;
}
if (!S_ISREG (stat_data.st_mode))
{
report_difference (_("Not a regular file"));
skip_file ((long) current_stat.st_size);
goto quit;
}
stat_data.st_mode &= 07777;
if (stat_data.st_mode != current_stat.st_mode)
report_difference (_("Mode differs"));
#if !MSDOS && !WIN32
/* stat() in djgpp's C library gives a constant number of 42 as the
uid and gid of a file. So, comparing an FTP'ed archive just after
unpack would fail on MSDOS. */
if (stat_data.st_uid != current_stat.st_uid)
report_difference (_("Uid differs"));
if (stat_data.st_gid != current_stat.st_gid)
report_difference (_("Gid differs"));
#endif
if (stat_data.st_mtime != current_stat.st_mtime)
report_difference (_("Mod time differs"));
if (current_header->header.typeflag != GNUTYPE_SPARSE &&
stat_data.st_size != current_stat.st_size)
{
report_difference (_("Size differs"));
skip_file ((long) current_stat.st_size);
goto quit;
}
diff_handle = open (current_file_name, O_NDELAY | O_RDONLY | O_BINARY);
if (diff_handle < 0 && !absolute_names_option)
{
char *tmpbuf = xmalloc (strlen (current_file_name) + 2);
*tmpbuf = PATHSEP;
strcpy (tmpbuf + 1, current_file_name);
diff_handle = open (tmpbuf, O_NDELAY | O_RDONLY);
free (tmpbuf);
}
if (diff_handle < 0)
{
ERROR ((0, errno, _("Cannot open %s"), current_file_name));
if (current_header->oldgnu_header.isextended)
skip_extended_headers ();
skip_file ((long) current_stat.st_size);
report_difference (NULL);
goto quit;
}
/* Need to treat sparse files completely differently here. */
if (current_header->header.typeflag == GNUTYPE_SPARSE)
diff_sparse_files (current_stat.st_size);
else
{
if (multi_volume_option)
{
assign_string (&save_name, current_file_name);
save_totsize = current_stat.st_size;
/* save_sizeleft is set in read_and_process. */
}
read_and_process ((long) (current_stat.st_size), process_rawdata);
if (multi_volume_option)
assign_string (&save_name, NULL);
}
status = close (diff_handle);
if (status < 0)
ERROR ((0, errno, _("Error while closing %s"), current_file_name));
quit:
break;
#if !MSDOS
case LNKTYPE:
{
dev_t dev;
ino_t ino;
if (!get_stat_data (&stat_data))
break;
dev = stat_data.st_dev;
ino = stat_data.st_ino;
status = stat (current_link_name, &stat_data);
if (status < 0)
{
if (errno == ENOENT)
report_difference (_("Does not exist"));
else
{
WARN ((0, errno, _("Cannot stat file %s"), current_file_name));
report_difference (NULL);
}
break;
}
if (stat_data.st_dev != dev || stat_data.st_ino != ino)
{
char *message = (char *)
xmalloc (MESSAGE_BUFFER_SIZE + strlen (current_link_name));
sprintf (message, _("Not linked to %s"), current_link_name);
report_difference (message);
free (message);
break;
}
break;
}
#endif /* not MSDOS */
#ifdef S_ISLNK
case SYMTYPE:
{
char linkbuf[NAME_FIELD_SIZE + 3]; /* FIXME: may be too short. */
status = readlink (current_file_name, linkbuf, (sizeof linkbuf) - 1);
if (status < 0)
{
if (errno == ENOENT)
report_difference (_("No such file or directory"));
else
{
WARN ((0, errno, _("Cannot read link %s"), current_file_name));
report_difference (NULL);
}
break;
}
linkbuf[status] = '\0'; /* null-terminate it */
if (strncmp (current_link_name, linkbuf, (size_t) status) != 0)
report_difference (_("Symlink differs"));
break;
}
#endif /* not S_ISLNK */
#ifdef S_IFCHR
case CHRTYPE:
current_stat.st_mode |= S_IFCHR;
goto check_node;
#endif /* not S_IFCHR */
#ifdef S_IFBLK
/* If local system doesn't support block devices, use default case. */
case BLKTYPE:
current_stat.st_mode |= S_IFBLK;
goto check_node;
#endif /* not S_IFBLK */
#ifdef S_ISFIFO
/* If local system doesn't support FIFOs, use default case. */
case FIFOTYPE:
# ifdef S_IFIFO
current_stat.st_mode |= S_IFIFO;
# endif
current_stat.st_rdev = 0; /* FIXME: do we need this? */
goto check_node;
#endif /* S_ISFIFO */
check_node:
/* FIXME: deal with umask. */
if (!get_stat_data (&stat_data))
break;
if (current_stat.st_rdev != stat_data.st_rdev)
{
report_difference (_("Device numbers changed"));
break;
}
if (
#ifdef S_IFMT
current_stat.st_mode != stat_data.st_mode
#else
/* POSIX lossage. */
(current_stat.st_mode & 07777) != (stat_data.st_mode & 07777)
#endif
)
{
report_difference (_("Mode or device-type changed"));
break;
}
break;
case GNUTYPE_DUMPDIR:
{
char *dumpdir_buffer = get_directory_contents (current_file_name, 0);
if (multi_volume_option)
{
assign_string (&save_name, current_file_name);
save_totsize = current_stat.st_size;
/* save_sizeleft is set in read_and_process. */
}
if (dumpdir_buffer)
{
dumpdir_cursor = dumpdir_buffer;
read_and_process ((long) (current_stat.st_size), process_dumpdir);
free (dumpdir_buffer);
}
else
read_and_process ((long) (current_stat.st_size), process_noop);
if (multi_volume_option)
assign_string (&save_name, NULL);
/* Fall through. */
}
case DIRTYPE:
/* Check for trailing /. */
name_length = strlen (current_file_name) - 1;
really_dir:
while (name_length && current_file_name[name_length] == PATHSEP)
current_file_name[name_length--] = '\0'; /* zap / */
if (!get_stat_data (&stat_data))
break;
if (!S_ISDIR (stat_data.st_mode))
{
report_difference (_("No longer a directory"));
break;
}
if ((stat_data.st_mode & 07777) != (current_stat.st_mode & 07777))
report_difference (_("Mode differs"));
break;
case GNUTYPE_VOLHDR:
break;
case GNUTYPE_MULTIVOL:
{
off_t offset;
name_length = strlen (current_file_name) - 1;
if (current_file_name[name_length] == PATHSEP)
goto really_dir;
if (!get_stat_data (&stat_data))
break;
if (!S_ISREG (stat_data.st_mode))
{
report_difference (_("Not a regular file"));
skip_file ((long) current_stat.st_size);
break;
}
stat_data.st_mode &= 07777;
offset = from_oct (1 + 12, current_header->oldgnu_header.offset);
if (stat_data.st_size != current_stat.st_size + offset)
{
report_difference (_("Size differs"));
skip_file ((long) current_stat.st_size);
break;
}
diff_handle = open (current_file_name, O_NDELAY | O_RDONLY | O_BINARY);
if (diff_handle < 0)
{
WARN ((0, errno, _("Cannot open file %s"), current_file_name));
report_difference (NULL);
skip_file ((long) current_stat.st_size);
break;
}
status = lseek (diff_handle, offset, 0);
if (status != offset)
{
WARN ((0, errno, _("Cannot seek to %ld in file %s"),
offset, current_file_name));
report_difference (NULL);
break;
}
if (multi_volume_option)
{
assign_string (&save_name, current_file_name);
save_totsize = stat_data.st_size;
/* save_sizeleft is set in read_and_process. */
}
read_and_process ((long) (current_stat.st_size), process_rawdata);
if (multi_volume_option)
assign_string (&save_name, NULL);
status = close (diff_handle);
if (status < 0)
ERROR ((0, errno, _("Error while closing %s"), current_file_name));
break;
}
}
}
void
diff_archive (void)
{
register char *data;
int check, namelen;
int err;
off_t offset;
struct stat filestat;
#ifndef __MSDOS__
dev_t dev;
ino_t ino;
#endif
errno = EPIPE; /* FIXME, remove perrors */
saverec (&head); /* make sure it sticks around */
userec (head); /* and go past it in the archive */
decode_header (head, &hstat, &head_standard, 1); /* snarf fields */
/* Print the record from `head' and `hstat'. */
if (flag_verbose)
{
if (now_verifying)
fprintf (stdlis, _("Verify "));
print_header ();
}
switch (head->header.linkflag)
{
default:
WARN ((0, 0, _("Unknown file type '%c' for %s, diffed as normal file"),
head->header.linkflag, current_file_name));
/* Fall through. */
case LF_OLDNORMAL:
case LF_NORMAL:
case LF_SPARSE:
case LF_CONTIG:
/* Appears to be a file. See if it's really a directory. */
namelen = strlen (current_file_name) - 1;
if (current_file_name[namelen] == '/')
goto really_dir;
if (do_stat (&filestat))
{
if (head->header.isextended)
skip_extended_headers ();
skip_file ((long) hstat.st_size);
different++;
goto quit;
}
if (!S_ISREG (filestat.st_mode))
{
fprintf (stdlis, _("%s: Not a regular file\n"), current_file_name);
skip_file ((long) hstat.st_size);
different++;
goto quit;
}
filestat.st_mode &= 07777;
if (filestat.st_mode != hstat.st_mode)
sigh (_("Mode"));
if (filestat.st_uid != hstat.st_uid)
sigh (_("Uid"));
if (filestat.st_gid != hstat.st_gid)
sigh (_("Gid"));
if (filestat.st_mtime != hstat.st_mtime)
sigh (_("Mod time"));
if (head->header.linkflag != LF_SPARSE &&
filestat.st_size != hstat.st_size)
{
sigh (_("Size"));
skip_file ((long) hstat.st_size);
goto quit;
}
diff_fd = open (current_file_name, O_NDELAY | O_RDONLY | O_BINARY);
if (diff_fd < 0 && !flag_absolute_names)
{
char *tmpbuf = tar_xmalloc (strlen (current_file_name) + 2);
*tmpbuf = '/';
strcpy (tmpbuf + 1, current_file_name);
diff_fd = open (tmpbuf, O_NDELAY | O_RDONLY);
free (tmpbuf);
}
if (diff_fd < 0)
{
ERROR ((0, errno, _("Cannot open %s"), current_file_name));
if (head->header.isextended)
skip_extended_headers ();
skip_file ((long) hstat.st_size);
different++;
goto quit;
}
/* Need to treat sparse files completely differently here. */
if (head->header.linkflag == LF_SPARSE)
diff_sparse_files (hstat.st_size);
else
{
if (flag_multivol)
{
assign_string (&save_name, current_file_name);
save_totsize = hstat.st_size;
/* save_size is set in wantbytes (). */
}
wantbytes ((long) (hstat.st_size), compare_chunk);
if (flag_multivol)
assign_string (&save_name, NULL);
}
check = close (diff_fd);
if (check < 0)
ERROR ((0, errno, _("Error while closing %s"), current_file_name));
quit:
break;
#ifndef __MSDOS__
case LF_LINK:
if (do_stat (&filestat))
break;
dev = filestat.st_dev;
ino = filestat.st_ino;
err = stat (current_link_name, &filestat);
if (err < 0)
{
if (errno == ENOENT)
fprintf (stdlis, _("%s: Does not exist\n"), current_file_name);
else
WARN ((0, errno, _("Cannot stat file %s"), current_file_name));
different++;
break;
}
if (filestat.st_dev != dev || filestat.st_ino != ino)
{
fprintf (stdlis, _("%s: Not linked to %s\n"),
current_file_name, current_link_name);
break;
}
break;
#endif
#ifdef S_ISLNK
case LF_SYMLINK:
{
char linkbuf[NAMSIZ + 3]; /* FIXME: may be too short. */
check = readlink (current_file_name, linkbuf, (sizeof linkbuf) - 1);
if (check < 0)
{
if (errno == ENOENT)
fprintf (stdlis, _("%s: No such file or directory\n"),
current_file_name);
else
WARN ((0, errno, _("Cannot read link %s"), current_file_name));
different++;
break;
}
linkbuf[check] = '\0'; /* null-terminate it */
if (strncmp (current_link_name, linkbuf, (size_t) check) != 0)
{
fprintf (stdlis, _("%s: Symlink differs\n"), current_link_name);
different++;
}
}
break;
#endif
#ifdef S_IFCHR
case LF_CHR:
hstat.st_mode |= S_IFCHR;
goto check_node;
#endif
#ifdef S_IFBLK
/* If local system doesn't support block devices, use default case. */
case LF_BLK:
hstat.st_mode |= S_IFBLK;
goto check_node;
#endif
#ifdef S_ISFIFO
/* If local system doesn't support FIFOs, use default case. */
case LF_FIFO:
#ifdef S_IFIFO
hstat.st_mode |= S_IFIFO;
#endif
hstat.st_rdev = 0; /* FIXME, do we need this? */
goto check_node;
#endif
check_node:
/* FIXME, deal with umask. */
if (do_stat (&filestat))
break;
if (hstat.st_rdev != filestat.st_rdev)
{
fprintf (stdlis, _("%s: Device numbers changed\n"),
current_file_name);
different++;
break;
}
if (
#ifdef S_IFMT
hstat.st_mode != filestat.st_mode
#else
/* POSIX lossage */
(hstat.st_mode & 07777) != (filestat.st_mode & 07777)
#endif
)
{
fprintf (stdlis, _("%s: Mode or device-type changed\n"),
current_file_name);
different++;
break;
}
break;
case LF_DUMPDIR:
data = diff_dir = get_dir_contents (current_file_name, 0);
if (flag_multivol)
{
assign_string (&save_name, current_file_name);
save_totsize = hstat.st_size;
/* save_size is set in wantbytes (). */
}
if (data)
{
wantbytes ((long) (hstat.st_size), compare_dir);
free (data);
}
else
wantbytes ((long) (hstat.st_size), no_op);
if (flag_multivol)
assign_string (&save_name, NULL);
/* Fall through. */
case LF_DIR:
/* Check for trailing /. */
namelen = strlen (current_file_name) - 1;
really_dir:
while (namelen && current_file_name[namelen] == '/')
current_file_name[namelen--] = '\0'; /* zap / */
if (do_stat (&filestat))
break;
if (!S_ISDIR (filestat.st_mode))
{
fprintf (stdlis, _("%s: No longer a directory\n"),
current_file_name);
different++;
break;
}
if ((filestat.st_mode & 07777) != (hstat.st_mode & 07777))
sigh (_("Mode"));
break;
case LF_VOLHDR:
break;
case LF_MULTIVOL:
namelen = strlen (current_file_name) - 1;
if (current_file_name[namelen] == '/')
goto really_dir;
if (do_stat (&filestat))
break;
if (!S_ISREG (filestat.st_mode))
{
fprintf (stdlis, _("%s: Not a regular file\n"), current_file_name);
skip_file ((long) hstat.st_size);
different++;
break;
}
filestat.st_mode &= 07777;
offset = from_oct (1 + 12, head->header.offset);
if (filestat.st_size != hstat.st_size + offset)
{
sigh (_("Size"));
skip_file ((long) hstat.st_size);
different++;
break;
}
diff_fd = open (current_file_name, O_NDELAY | O_RDONLY | O_BINARY);
if (diff_fd < 0)
{
WARN ((0, errno, _("Cannot open file %s"), current_file_name));
skip_file ((long) hstat.st_size);
different++;
break;
}
err = lseek (diff_fd, offset, 0);
if (err != offset)
{
WARN ((0, errno, _("Cannot seek to %ld in file %s"),
offset, current_file_name));
different++;
break;
}
if (flag_multivol)
{
assign_string (&save_name, current_file_name);
save_totsize = filestat.st_size;
/* save_size is set in wantbytes (). */
}
wantbytes ((long) (hstat.st_size), compare_chunk);
if (flag_multivol)
assign_string (&save_name, NULL);
check = close (diff_fd);
if (check < 0)
ERROR ((0, errno, _("Error while closing %s"), current_file_name));
break;
}
/* We don't need to save it any longer. */
saverec ((union record **) 0); /* unsave it */
}
