#include "system.h"
#include <signal.h>
#include <time.h>
time_t time ();
#if MSDOS
# include <process.h>
#endif
#if XENIX
# include <sys/inode.h>
#endif
#ifndef FNM_LEADING_DIR
# include <fnmatch.h>
#endif
#include "common.h"
#include "rmt.h"
#define DEBUG_FORK 0
#define PREAD 0
#define PWRITE 1
#define READ_ERROR_MAX 10
#define VOLUME_LABEL_APPEND " Volume [1-9]*"
static tarlong total_written;
static tarlong bytes_written;
union block *record_start;
union block *record_end;
union block *current_block;
enum access_mode access_mode;
static struct stat archive_stat;
static off_t record_start_block;
FILE *stdlis;
static void backspace_output PARAMS ((void));
static int new_volume PARAMS ((enum access_mode));
static void write_error PARAMS ((ssize_t));
static void read_error PARAMS ((void));
#if !MSDOS
dev_t ar_dev;
ino_t ar_ino;
#endif
static pid_t child_pid;
static int read_error_count;
static int hit_eof;
static int checkpoint;
extern int time_to_start_writing;
int file_to_switch_to = -1;
static int volno = 1;
static int global_volno = 1;
char *save_name;
off_t save_totsize;
off_t save_sizeleft;
int write_archive_to_stdout = 0;
static char *real_s_name = NULL;
static off_t real_s_totsize;
static off_t real_s_sizeleft;
#if DEBUG_FORK
static pid_t
myfork (void)
{
pid_t result = fork();
if (result == 0)
kill (getpid (), SIGSTOP);
return result;
}
# define fork myfork
#endif
void
init_total_written (void)
{
clear_tarlong (total_written);
clear_tarlong (bytes_written);
}
void
print_total_written (void)
{
fprintf (stderr, _("Total bytes written: "));
print_tarlong (total_written, stderr);
fprintf (stderr, "\n");
}
off_t
current_block_ordinal (void)
{
return record_start_block + (current_block - record_start);
}
void
reset_eof (void)
{
if (hit_eof)
{
hit_eof = 0;
current_block = record_start;
record_end = record_start + blocking_factor;
access_mode = ACCESS_WRITE;
}
}
union block *
find_next_block (void)
{
if (current_block == record_end)
{
if (hit_eof)
return NULL;
flush_archive ();
if (current_block == record_end)
{
hit_eof = 1;
return NULL;
}
}
return current_block;
}
void
set_next_block_after (union block *block)
{
while (block >= current_block)
current_block++;
if (current_block > record_end)
abort ();
}
size_t
available_space_after (union block *pointer)
{
return record_end->buffer - pointer->buffer;
}
static void
xclose (int fd)
{
if (close (fd) < 0)
FATAL_ERROR ((0, errno, _("Cannot close file #%d"), fd));
}
static void
xdup2 (int from, int into, const char *message)
{
if (from != into)
{
int status = close (into);
if (status < 0 && errno != EBADF)
FATAL_ERROR ((0, errno, _("Cannot close descriptor %d"), into));
status = dup (from);
if (status != into)
FATAL_ERROR ((0, errno, _("Cannot properly duplicate %s"), message));
xclose (from);
}
}
#if MSDOS
static void
child_open_for_compress (void)
{
FATAL_ERROR ((0, 0, _("Cannot use compressed or remote archives")));
}
static void
child_open_for_uncompress (void)
{
FATAL_ERROR ((0, 0, _("Cannot use compressed or remote archives")));
}
#else
static int
is_regular_file (const char *name)
{
struct stat stbuf;
if (stat (name, &stbuf) < 0)
return 1;
if (S_ISREG (stbuf.st_mode))
return 1;
return 0;
}
static ssize_t
write_archive_buffer (void)
{
ssize_t status;
ssize_t written = 0;
while (0 <= (status = rmtwrite (archive, record_start->buffer + written,
record_size - written)))
{
written += status;
if (written == record_size
|| _isrmt (archive) || ! S_ISFIFO (archive_stat.st_mode))
break;
}
return written ? written : status;
}
static void
child_open_for_compress (void)
{
int parent_pipe[2];
int child_pipe[2];
pid_t grandchild_pid;
if (pipe (parent_pipe) < 0)
FATAL_ERROR ((0, errno, _("Cannot open pipe")));
child_pid = fork ();
if (child_pid < 0)
FATAL_ERROR ((0, errno, _("Cannot fork")));
if (child_pid > 0)
{
archive = parent_pipe[PWRITE];
xclose (parent_pipe[PREAD]);
return;
}
program_name = _("tar (child)");
xdup2 (parent_pipe[PREAD], STDIN_FILENO, _("(child) Pipe to stdin"));
xclose (parent_pipe[PWRITE]);
if (strcmp (archive_name_array[0], "-") != 0
&& !_remdev (archive_name_array[0])
&& is_regular_file (archive_name_array[0]))
{
if (backup_option)
maybe_backup_file (archive_name_array[0], 1);
archive = creat (archive_name_array[0], MODE_RW);
if (archive < 0)
{
int saved_errno = errno;
if (backup_option)
undo_last_backup ();
FATAL_ERROR ((0, saved_errno, _("Cannot open archive %s"),
archive_name_array[0]));
}
xdup2 (archive, STDOUT_FILENO, _("Archive to stdout"));
execlp (use_compress_program_option, use_compress_program_option,
(char *) 0);
FATAL_ERROR ((0, errno, _("Cannot exec %s"),
use_compress_program_option));
}
if (pipe (child_pipe) < 0)
FATAL_ERROR ((0, errno, _("Cannot open pipe")));
grandchild_pid = fork ();
if (grandchild_pid < 0)
FATAL_ERROR ((0, errno, _("Child cannot fork")));
if (grandchild_pid > 0)
{
xdup2 (child_pipe[PWRITE], STDOUT_FILENO,
_("((child)) Pipe to stdout"));
xclose (child_pipe[PREAD]);
execlp (use_compress_program_option, use_compress_program_option,
(char *) 0);
FATAL_ERROR ((0, errno, _("Cannot exec %s"),
use_compress_program_option));
}
program_name = _("tar (grandchild)");
xdup2 (child_pipe[PREAD], STDIN_FILENO, _("(grandchild) Pipe to stdin"));
xclose (child_pipe[PWRITE]);
if (strcmp (archive_name_array[0], "-") == 0)
archive = STDOUT_FILENO;
else
archive = rmtcreat (archive_name_array[0], MODE_RW, rsh_command_option);
if (archive < 0)
FATAL_ERROR ((0, errno, _("Cannot open archive %s"),
archive_name_array[0]));
while (1)
{
ssize_t status = 0;
char *cursor;
size_t length;
for (length = 0, cursor = record_start->buffer;
length < record_size;
length += status, cursor += status)
{
size_t size = record_size - length;
if (size < BLOCKSIZE)
size = BLOCKSIZE;
status = safe_read (STDIN_FILENO, cursor, size);
if (status <= 0)
break;
}
if (status < 0)
FATAL_ERROR ((0, errno, _("Cannot read from compression program")));
if (status == 0)
{
if (length > 0)
{
memset (record_start->buffer + length, 0, record_size - length);
status = write_archive_buffer ();
if (status != record_size)
write_error (status);
}
break;
}
status = write_archive_buffer ();
if (status != record_size)
write_error (status);
}
#if 0
close_archive ();
#endif
exit (exit_status);
}
static void
child_open_for_uncompress (void)
{
int parent_pipe[2];
int child_pipe[2];
pid_t grandchild_pid;
if (pipe (parent_pipe) < 0)
FATAL_ERROR ((0, errno, _("Cannot open pipe")));
child_pid = fork ();
if (child_pid < 0)
FATAL_ERROR ((0, errno, _("Cannot fork")));
if (child_pid > 0)
{
read_full_records_option = 1;
archive = parent_pipe[PREAD];
xclose (parent_pipe[PWRITE]);
return;
}
program_name = _("tar (child)");
xdup2 (parent_pipe[PWRITE], STDOUT_FILENO, _("(child) Pipe to stdout"));
xclose (parent_pipe[PREAD]);
if (strcmp (archive_name_array[0], "-") != 0
&& !_remdev (archive_name_array[0])
&& is_regular_file (archive_name_array[0]))
{
archive = open (archive_name_array[0], O_RDONLY | O_BINARY, MODE_RW);
if (archive < 0)
FATAL_ERROR ((0, errno, _("Cannot open archive %s"),
archive_name_array[0]));
xdup2 (archive, STDIN_FILENO, _("Archive to stdin"));
execlp (use_compress_program_option, use_compress_program_option,
"-d", (char *) 0);
FATAL_ERROR ((0, errno, _("Cannot exec %s"),
use_compress_program_option));
}
if (pipe (child_pipe) < 0)
FATAL_ERROR ((0, errno, _("Cannot open pipe")));
grandchild_pid = fork ();
if (grandchild_pid < 0)
FATAL_ERROR ((0, errno, _("Child cannot fork")));
if (grandchild_pid > 0)
{
xdup2 (child_pipe[PREAD], STDIN_FILENO, _("((child)) Pipe to stdin"));
xclose (child_pipe[PWRITE]);
execlp (use_compress_program_option, use_compress_program_option,
"-d", (char *) 0);
FATAL_ERROR ((0, errno, _("Cannot exec %s"),
use_compress_program_option));
}
program_name = _("tar (grandchild)");
xdup2 (child_pipe[PWRITE], STDOUT_FILENO, _("(grandchild) Pipe to stdout"));
xclose (child_pipe[PREAD]);
if (strcmp (archive_name_array[0], "-") == 0)
archive = STDIN_FILENO;
else
archive = rmtopen (archive_name_array[0], O_RDONLY | O_BINARY,
MODE_RW, rsh_command_option);
if (archive < 0)
FATAL_ERROR ((0, errno, _("Cannot open archive %s"),
archive_name_array[0]));
while (1)
{
char *cursor;
size_t maximum;
size_t count;
ssize_t status;
read_error_count = 0;
error_loop:
status = rmtread (archive, record_start->buffer, record_size);
if (status < 0)
{
read_error ();
goto error_loop;
}
if (status == 0)
break;
cursor = record_start->buffer;
maximum = status;
while (maximum)
{
count = maximum < BLOCKSIZE ? maximum : BLOCKSIZE;
status = full_write (STDOUT_FILENO, cursor, count);
if (status < 0)
FATAL_ERROR ((0, errno, _("\
Cannot write to compression program")));
if (status != count)
{
ERROR ((0, 0, _("\
Write to compression program short %lu bytes"),
(unsigned long) (count - status)));
count = status;
}
cursor += count;
maximum -= count;
}
}
#if 0
close_archive ();
#endif
exit (exit_status);
}
#endif
static int
check_label_pattern (union block *label)
{
char *string;
int result;
if (fnmatch (volume_label_option, label->header.name, 0) == 0)
return 1;
if (!multi_volume_option)
return 0;
string = xmalloc (strlen (volume_label_option)
+ sizeof VOLUME_LABEL_APPEND + 1);
strcpy (string, volume_label_option);
strcat (string, VOLUME_LABEL_APPEND);
result = fnmatch (string, label->header.name, 0) == 0;
free (string);
return result;
}
void
open_archive (enum access_mode access)
{
int backed_up_flag = 0;
stdlis = to_stdout_option ? stderr : stdout;
if (record_size == 0)
FATAL_ERROR ((0, 0, _("Invalid value for record_size")));
if (archive_names == 0)
FATAL_ERROR ((0, 0, _("No archive name given")));
current_file_name = NULL;
current_link_name = NULL;
if (!real_s_name)
real_s_name = (char *) xmalloc (PATH_MAX);
save_name = NULL;
if (multi_volume_option)
{
record_start
= (union block *) valloc (record_size + (2 * BLOCKSIZE));
if (record_start)
record_start += 2;
}
else
record_start = (union block *) valloc (record_size);
if (!record_start)
FATAL_ERROR ((0, 0, _("Could not allocate memory for blocking factor %d"),
blocking_factor));
current_block = record_start;
record_end = record_start + blocking_factor;
access_mode = access == ACCESS_UPDATE ? ACCESS_READ : access;
if (multi_volume_option && verify_option)
FATAL_ERROR ((0, 0, _("Cannot verify multi-volume archives")));
if (use_compress_program_option)
{
if (multi_volume_option)
FATAL_ERROR ((0, 0, _("Cannot use multi-volume compressed archives")));
if (verify_option)
FATAL_ERROR ((0, 0, _("Cannot verify compressed archives")));
switch (access)
{
case ACCESS_READ:
child_open_for_uncompress ();
break;
case ACCESS_WRITE:
child_open_for_compress ();
break;
case ACCESS_UPDATE:
FATAL_ERROR ((0, 0, _("Cannot update compressed archives")));
break;
}
if (access == ACCESS_WRITE && strcmp (archive_name_array[0], "-") == 0)
stdlis = stderr;
}
else if (strcmp (archive_name_array[0], "-") == 0)
{
read_full_records_option = 1;
if (verify_option)
FATAL_ERROR ((0, 0, _("Cannot verify stdin/stdout archive")));
switch (access)
{
case ACCESS_READ:
archive = STDIN_FILENO;
break;
case ACCESS_WRITE:
archive = STDOUT_FILENO;
stdlis = stderr;
break;
case ACCESS_UPDATE:
archive = STDIN_FILENO;
stdlis = stderr;
write_archive_to_stdout = 1;
break;
}
}
else if (verify_option)
archive = rmtopen (archive_name_array[0], O_RDWR | O_CREAT | O_BINARY,
MODE_RW, rsh_command_option);
else
switch (access)
{
case ACCESS_READ:
archive = rmtopen (archive_name_array[0], O_RDONLY | O_BINARY,
MODE_RW, rsh_command_option);
break;
case ACCESS_WRITE:
if (backup_option)
{
maybe_backup_file (archive_name_array[0], 1);
backed_up_flag = 1;
}
archive = rmtcreat (archive_name_array[0], MODE_RW,
rsh_command_option);
break;
case ACCESS_UPDATE:
archive = rmtopen (archive_name_array[0], O_RDWR | O_CREAT | O_BINARY,
MODE_RW, rsh_command_option);
break;
}
if (archive < 0
|| (! _isrmt (archive) && fstat (archive, &archive_stat) < 0))
{
int saved_errno = errno;
if (backed_up_flag)
undo_last_backup ();
FATAL_ERROR ((0, saved_errno, _("Cannot open %s"),
archive_name_array[0]));
}
#if !MSDOS
{
static char const dev_null[] = "/dev/null";
struct stat dev_null_stat;
dev_null_output =
(strcmp (archive_name_array[0], dev_null) == 0
|| (! _isrmt (archive)
&& stat (dev_null, &dev_null_stat) == 0
&& S_ISCHR (archive_stat.st_mode)
&& archive_stat.st_rdev == dev_null_stat.st_rdev));
}
if (!_isrmt (archive) && S_ISREG (archive_stat.st_mode))
{
ar_dev = archive_stat.st_dev;
ar_ino = archive_stat.st_ino;
}
else
ar_dev = 0;
#endif
#if MSDOS
setmode (archive, O_BINARY);
#endif
switch (access)
{
case ACCESS_READ:
case ACCESS_UPDATE:
record_end = record_start;
find_next_block ();
if (volume_label_option)
{
union block *label = find_next_block ();
if (!label)
FATAL_ERROR ((0, 0, _("Archive not labelled to match `%s'"),
volume_label_option));
if (!check_label_pattern (label))
FATAL_ERROR ((0, 0, _("Volume `%s' does not match `%s'"),
label->header.name, volume_label_option));
}
break;
case ACCESS_WRITE:
if (volume_label_option)
{
memset ((void *) record_start, 0, BLOCKSIZE);
if (multi_volume_option)
sprintf (record_start->header.name, "%s Volume 1",
volume_label_option);
else
strcpy (record_start->header.name, volume_label_option);
assign_string (¤t_file_name, record_start->header.name);
record_start->header.typeflag = GNUTYPE_VOLHDR;
TIME_TO_OCT (time (0), record_start->header.mtime);
finish_header (record_start);
#if 0
current_block++;
#endif
}
break;
}
}
void
flush_write (void)
{
int copy_back;
ssize_t status;
if (checkpoint_option && !(++checkpoint % 10))
WARN ((0, 0, _("Write checkpoint %d"), checkpoint));
if (!zerop_tarlong (tape_length_option)
&& !lessp_tarlong (bytes_written, tape_length_option))
{
errno = ENOSPC;
status = 0;
}
else if (dev_null_output)
status = record_size;
else
status = write_archive_buffer ();
if (status != record_size && !multi_volume_option)
write_error (status);
else if (totals_option)
add_to_tarlong (total_written, record_size);
if (status > 0)
add_to_tarlong (bytes_written, status);
if (status == record_size)
{
if (multi_volume_option)
{
char *cursor;
if (!save_name)
{
real_s_name[0] = '\0';
real_s_totsize = 0;
real_s_sizeleft = 0;
return;
}
cursor = save_name;
#if MSDOS
if (cursor[1] == ':')
cursor += 2;
#endif
while (*cursor == '/')
cursor++;
strcpy (real_s_name, cursor);
real_s_totsize = save_totsize;
real_s_sizeleft = save_sizeleft;
}
return;
}
if (status < 0 && errno != ENOSPC && errno != EIO && errno != ENXIO)
write_error (status);
if (!new_volume (ACCESS_WRITE))
return;
clear_tarlong (bytes_written);
if (volume_label_option && real_s_name[0])
{
copy_back = 2;
record_start -= 2;
}
else if (volume_label_option || real_s_name[0])
{
copy_back = 1;
record_start--;
}
else
copy_back = 0;
if (volume_label_option)
{
memset ((void *) record_start, 0, BLOCKSIZE);
sprintf (record_start->header.name, "%s Volume %d", volume_label_option, volno);
TIME_TO_OCT (time (0), record_start->header.mtime);
record_start->header.typeflag = GNUTYPE_VOLHDR;
finish_header (record_start);
}
if (real_s_name[0])
{
int tmp;
if (volume_label_option)
record_start++;
memset ((void *) record_start, 0, BLOCKSIZE);
strcpy (record_start->header.name, real_s_name);
record_start->header.typeflag = GNUTYPE_MULTIVOL;
OFF_TO_OCT (real_s_sizeleft, record_start->header.size);
OFF_TO_OCT (real_s_totsize - real_s_sizeleft,
record_start->oldgnu_header.offset);
tmp = verbose_option;
verbose_option = 0;
finish_header (record_start);
verbose_option = tmp;
if (volume_label_option)
record_start--;
}
status = write_archive_buffer ();
if (status != record_size)
write_error (status);
else if (totals_option)
add_to_tarlong (total_written, record_size);
add_to_tarlong (bytes_written, record_size);
if (copy_back)
{
record_start += copy_back;
memcpy ((void *) current_block,
(void *) (record_start + blocking_factor - copy_back),
(size_t) (copy_back * BLOCKSIZE));
current_block += copy_back;
if (real_s_sizeleft >= copy_back * BLOCKSIZE)
real_s_sizeleft -= copy_back * BLOCKSIZE;
else if ((real_s_sizeleft + BLOCKSIZE - 1) / BLOCKSIZE <= copy_back)
real_s_name[0] = '\0';
else
{
char *cursor = save_name;
#if MSDOS
if (cursor[1] == ':')
cursor += 2;
#endif
while (*cursor == '/')
cursor++;
strcpy (real_s_name, cursor);
real_s_sizeleft = save_sizeleft;
real_s_totsize = save_totsize;
}
copy_back = 0;
}
}
static void
write_error (ssize_t status)
{
int saved_errno = errno;
if (totals_option)
print_total_written ();
if (status < 0)
FATAL_ERROR ((0, saved_errno, _("Cannot write to %s"),
*archive_name_cursor));
else
FATAL_ERROR ((0, 0, _("Only wrote %lu of %lu bytes to %s"),
(unsigned long) status, (unsigned long) record_size,
*archive_name_cursor));
}
static void
read_error (void)
{
WARN ((0, errno, _("Read error on %s"), *archive_name_cursor));
if (record_start_block == 0)
FATAL_ERROR ((0, 0, _("At beginning of tape, quitting now")));
if (read_error_count++ > READ_ERROR_MAX)
FATAL_ERROR ((0, 0, _("Too many errors, quitting")));
return;
}
void
flush_read (void)
{
ssize_t status;
size_t left;
char *more;
if (checkpoint_option && !(++checkpoint % 10))
WARN ((0, 0, _("Read checkpoint %d"), checkpoint));
read_error_count = 0;
if (write_archive_to_stdout && record_start_block != 0)
{
status = write_archive_buffer ();
if (status != record_size)
write_error (status);
}
if (multi_volume_option)
{
if (save_name)
{
char *cursor = save_name;
#if MSDOS
if (cursor[1] == ':')
cursor += 2;
#endif
while (*cursor == '/')
cursor++;
strcpy (real_s_name, cursor);
real_s_sizeleft = save_sizeleft;
real_s_totsize = save_totsize;
}
else
{
real_s_name[0] = '\0';
real_s_totsize = 0;
real_s_sizeleft = 0;
}
}
error_loop:
status = rmtread (archive, record_start->buffer, record_size);
if (status == record_size)
return;
if ((status == 0
|| (status < 0 && errno == ENOSPC)
|| (status > 0 && !read_full_records_option))
&& multi_volume_option)
{
union block *cursor;
try_volume:
switch (subcommand_option)
{
case APPEND_SUBCOMMAND:
case CAT_SUBCOMMAND:
case UPDATE_SUBCOMMAND:
if (!new_volume (ACCESS_UPDATE))
return;
break;
default:
if (!new_volume (ACCESS_READ))
return;
break;
}
vol_error:
status = rmtread (archive, record_start->buffer, record_size);
if (status < 0)
{
read_error ();
goto vol_error;
}
if (status != record_size)
goto short_read;
cursor = record_start;
if (cursor->header.typeflag == GNUTYPE_VOLHDR)
{
if (volume_label_option)
{
if (!check_label_pattern (cursor))
{
WARN ((0, 0, _("Volume `%s' does not match `%s'"),
cursor->header.name, volume_label_option));
volno--;
global_volno--;
goto try_volume;
}
}
if (verbose_option)
fprintf (stdlis, _("Reading %s\n"), cursor->header.name);
cursor++;
}
else if (volume_label_option)
WARN ((0, 0, _("WARNING: No volume header")));
if (real_s_name[0])
{
uintmax_t s1, s2;
if (cursor->header.typeflag != GNUTYPE_MULTIVOL
|| strcmp (cursor->header.name, real_s_name))
{
WARN ((0, 0, _("%s is not continued on this volume"),
real_s_name));
volno--;
global_volno--;
goto try_volume;
}
s1 = UINTMAX_FROM_OCT (cursor->header.size);
s2 = UINTMAX_FROM_OCT (cursor->oldgnu_header.offset);
if (real_s_totsize != s1 + s2 || s1 + s2 < s2)
{
char totsizebuf[UINTMAX_STRSIZE_BOUND];
char s1buf[UINTMAX_STRSIZE_BOUND];
char s2buf[UINTMAX_STRSIZE_BOUND];
WARN ((0, 0, _("%s is the wrong size (%s != %s + %s)"),
cursor->header.name,
STRINGIFY_BIGINT (save_totsize, totsizebuf),
STRINGIFY_BIGINT (s1, s1buf),
STRINGIFY_BIGINT (s2, s2buf)));
volno--;
global_volno--;
goto try_volume;
}
if (real_s_totsize - real_s_sizeleft
!= OFF_FROM_OCT (cursor->oldgnu_header.offset))
{
WARN ((0, 0, _("This volume is out of sequence")));
volno--;
global_volno--;
goto try_volume;
}
cursor++;
}
current_block = cursor;
return;
}
else if (status < 0)
{
read_error ();
goto error_loop;
}
short_read:
more = record_start->buffer + status;
left = record_size - status;
again:
if (left % BLOCKSIZE == 0)
{
if (!read_full_records_option && verbose_option
&& record_start_block == 0 && status > 0)
WARN ((0, 0, _("Record size = %lu blocks"),
(unsigned long) (status / BLOCKSIZE)));
record_end = record_start + (record_size - left) / BLOCKSIZE;
return;
}
if (read_full_records_option)
{
if (left > 0)
{
error2loop:
status = rmtread (archive, more, left);
if (status < 0)
{
read_error ();
goto error2loop;
}
if (status == 0)
FATAL_ERROR ((0, 0, _("Archive %s EOF not on block boundary"),
*archive_name_cursor));
left -= status;
more += status;
goto again;
}
}
else
FATAL_ERROR ((0, 0, _("Only read %lu bytes from archive %s"),
(unsigned long) status, *archive_name_cursor));
}
void
flush_archive (void)
{
record_start_block += record_end - record_start;
current_block = record_start;
record_end = record_start + blocking_factor;
if (access_mode == ACCESS_READ && time_to_start_writing)
{
access_mode = ACCESS_WRITE;
time_to_start_writing = 0;
if (file_to_switch_to >= 0)
{
int status = rmtclose (archive);
if (status < 0)
WARN ((0, errno, _("WARNING: Cannot close %s (%d, %d)"),
*archive_name_cursor, archive, status));
archive = file_to_switch_to;
}
else
backspace_output ();
}
switch (access_mode)
{
case ACCESS_READ:
flush_read ();
break;
case ACCESS_WRITE:
flush_write ();
break;
case ACCESS_UPDATE:
abort ();
}
}
static void
backspace_output (void)
{
#ifdef MTIOCTOP
{
struct mtop operation;
operation.mt_op = MTBSR;
operation.mt_count = 1;
if (rmtioctl (archive, MTIOCTOP, (char *) &operation) >= 0)
return;
if (errno == EIO && rmtioctl (archive, MTIOCTOP, (char *) &operation) >= 0)
return;
}
#endif
{
off_t position = rmtlseek (archive, (off_t) 0, SEEK_CUR);
position -= record_size;
if (rmtlseek (archive, position, SEEK_SET) != position)
{
WARN ((0, 0, _("\
Could not backspace archive file; it may be unreadable without -i")));
if (record_start->buffer != output_start)
memset (record_start->buffer, 0,
(size_t) (output_start - record_start->buffer));
}
}
}
void
close_archive (void)
{
if (time_to_start_writing || access_mode == ACCESS_WRITE)
flush_archive ();
#if !MSDOS
if (access_mode == ACCESS_READ
&& ! _isrmt (archive)
&& S_ISFIFO (archive_stat.st_mode))
while (rmtread (archive, record_start->buffer, record_size) > 0)
continue;
#endif
if (! _isrmt (archive) && subcommand_option == DELETE_SUBCOMMAND)
{
#if MSDOS
int status = write (archive, "", 0);
#else
off_t pos = lseek (archive, (off_t) 0, SEEK_CUR);
int status = pos < 0 ? -1 : ftruncate (archive, pos);
#endif
if (status != 0)
WARN ((0, errno, _("WARNING: Cannot truncate %s"),
*archive_name_cursor));
}
if (verify_option)
verify_volume ();
{
int status = rmtclose (archive);
if (status < 0)
WARN ((0, errno, _("WARNING: Cannot close %s (%d, %d)"),
*archive_name_cursor, archive, status));
}
#if !MSDOS
if (child_pid)
{
WAIT_T wait_status;
pid_t child;
while ((child = wait (&wait_status), child != child_pid)
&& child != -1)
continue;
if (child != -1)
{
if (WIFSIGNALED (wait_status)
#if 0
&& !WIFSTOPPED (wait_status)
#endif
)
{
if (WTERMSIG (wait_status) != SIGPIPE)
ERROR ((0, 0, _("Child died with signal %d%s"),
WTERMSIG (wait_status),
WCOREDUMP (wait_status) ? _(" (core dumped)") : ""));
}
else
{
if (WEXITSTATUS (wait_status) != (SIGPIPE + 128)
&& WEXITSTATUS (wait_status))
ERROR ((0, 0, _("Child returned status %d"),
WEXITSTATUS (wait_status)));
}
}
}
#endif
if (current_file_name)
free (current_file_name);
if (current_link_name)
free (current_link_name);
if (save_name)
free (save_name);
free (multi_volume_option ? record_start - 2 : record_start);
}
void
init_volume_number (void)
{
FILE *file = fopen (volno_file_option, "r");
if (file)
{
fscanf (file, "%d", &global_volno);
if (fclose (file) == EOF)
ERROR ((0, errno, "%s", volno_file_option));
}
else if (errno != ENOENT)
ERROR ((0, errno, "%s", volno_file_option));
}
void
closeout_volume_number (void)
{
FILE *file = fopen (volno_file_option, "w");
if (file)
{
fprintf (file, "%d\n", global_volno);
if (fclose (file) == EOF)
ERROR ((0, errno, "%s", volno_file_option));
}
else
ERROR ((0, errno, "%s", volno_file_option));
}
static int
new_volume (enum access_mode access)
{
static FILE *read_file = NULL;
static int looped = 0;
int status;
if (!read_file && !info_script_option)
read_file = archive == STDIN_FILENO ? fopen (TTY_NAME, "r") : stdin;
if (now_verifying)
return 0;
if (verify_option)
verify_volume ();
if (status = rmtclose (archive), status < 0)
WARN ((0, errno, _("WARNING: Cannot close %s (%d, %d)"),
*archive_name_cursor, archive, status));
global_volno++;
volno++;
archive_name_cursor++;
if (archive_name_cursor == archive_name_array + archive_names)
{
archive_name_cursor = archive_name_array;
looped = 1;
}
tryagain:
if (looped)
{
if (info_script_option)
{
if (volno_file_option)
closeout_volume_number ();
system (info_script_option);
}
else
while (1)
{
char input_buffer[80];
fputc ('\007', stderr);
fprintf (stderr,
_("Prepare volume #%d for %s and hit return: "),
global_volno, *archive_name_cursor);
fflush (stderr);
if (fgets (input_buffer, sizeof (input_buffer), read_file) == 0)
{
fprintf (stderr, _("EOF where user reply was expected"));
if (subcommand_option != EXTRACT_SUBCOMMAND
&& subcommand_option != LIST_SUBCOMMAND
&& subcommand_option != DIFF_SUBCOMMAND)
WARN ((0, 0, _("WARNING: Archive is incomplete")));
exit (TAREXIT_FAILURE);
}
if (input_buffer[0] == '\n'
|| input_buffer[0] == 'y'
|| input_buffer[0] == 'Y')
break;
switch (input_buffer[0])
{
case '?':
{
fprintf (stderr, _("\
n [name] Give a new file name for the next (and subsequent) volume(s)\n\
q Abort tar\n\
! Spawn a subshell\n\
? Print this list\n"));
}
break;
case 'q':
fprintf (stdlis, _("No new volume; exiting.\n"));
if (subcommand_option != EXTRACT_SUBCOMMAND
&& subcommand_option != LIST_SUBCOMMAND
&& subcommand_option != DIFF_SUBCOMMAND)
WARN ((0, 0, _("WARNING: Archive is incomplete")));
exit (TAREXIT_FAILURE);
case 'n':
{
char *name = &input_buffer[1];
char *cursor;
while (*name == ' ' || *name == '\t')
name++;
cursor = name;
while (*cursor && *cursor != '\n')
cursor++;
*cursor = '\0';
*archive_name_cursor = xstrdup (name);
}
break;
case '!':
#if MSDOS
spawnl (P_WAIT, getenv ("COMSPEC"), "-", 0);
#else
switch (fork ())
{
case -1:
WARN ((0, errno, _("Cannot fork!")));
break;
case 0:
{
const char *shell = getenv ("SHELL");
if (shell == NULL)
shell = "/bin/sh";
execlp (shell, "-sh", "-i", 0);
FATAL_ERROR ((0, errno, _("Cannot exec a shell %s"),
shell));
}
default:
{
WAIT_T wait_status;
wait (&wait_status);
}
break;
}
#endif
break;
}
}
}
if (verify_option)
archive = rmtopen (*archive_name_cursor, O_RDWR | O_CREAT, MODE_RW,
rsh_command_option);
else
switch (access)
{
case ACCESS_READ:
archive = rmtopen (*archive_name_cursor, O_RDONLY, MODE_RW,
rsh_command_option);
break;
case ACCESS_WRITE:
if (backup_option)
maybe_backup_file (*archive_name_cursor, 1);
archive = rmtcreat (*archive_name_cursor, MODE_RW,
rsh_command_option);
break;
case ACCESS_UPDATE:
archive = rmtopen (*archive_name_cursor, O_RDWR | O_CREAT, MODE_RW,
rsh_command_option);
break;
}
if (archive < 0)
{
WARN ((0, errno, _("Cannot open %s"), *archive_name_cursor));
if (!verify_option && access == ACCESS_WRITE && backup_option)
undo_last_backup ();
goto tryagain;
}
#if MSDOS
setmode (archive, O_BINARY);
#endif
return 1;
}