/*
* write data into zio buffer
*/
static int zio_write_data (zio_t *zio, void *buf, size_t len)
{
int n = 0;
int ndropped = 0;
/*
* If buffer is empty, first try writing directly to dstfd
* to avoid double-copy:
*/
if (zio_buffer_empty (zio)) {
n = write (zio->dstfd, buf, len);
if (n < 0) {
if (errno == EAGAIN)
n = 0;
else
return (-1);
}
/*
* If we wrote everything, return early
*/
if (n == len) {
if (zio_eof (zio))
zio_close (zio);
return (len);
}
}
/*
* Otherwise, buffer any remaining data
*/
if ((len - n) && cbuf_write (zio->buf, buf+n, len-n, &ndropped) < 0)
return (-1);
return (0);
}
static int zio_flux_read_cb (flux_t f, int fd, short revents, zio_t *zio)
{
int rc;
zio_handler_start (zio);
rc = zio_read_cb_common (zio);
if (rc >= 0 && zio_eof_sent (zio)) {
zio_debug (zio, "reader detaching from flux reactor\n");
flux_fdhandler_remove (f, fd, ZMQ_POLLIN|ZMQ_POLLERR);
rc = zio_close (zio);
}
zio_handler_end (zio);
return (rc);
}
static int zio_zloop_read_cb (zloop_t *zl, zmq_pollitem_t *zp, zio_t *zio)
{
int rc;
zio_handler_start (zio);
rc = zio_read_cb_common (zio);
if (rc >= 0 && zio_eof_sent (zio)) {
zio_debug (zio, "reader detaching from zloop\n");
zloop_poller_end (zl, zp);
rc = zio_close (zio);
}
zio_handler_end (zio);
return (rc);
}
int zio_write_eof (zio_t *zio)
{
if ((zio == NULL) || (zio->magic != ZIO_MAGIC) || !zio_writer (zio)) {
errno = EINVAL;
return (-1);
}
zio_set_eof (zio);
/* If no data is buffered, then we can close the dst fd:
*/
if (zio_buffer_empty (zio))
zio_close (zio);
return (0);
}
/*
* Callback when zio->dstfd is writeable. Write buffered data to
* file descriptor.
*/
static int zio_writer_cb (zio_t *zio)
{
int rc = 0;
if (cbuf_used (zio->buf))
rc = cbuf_read_to_fd (zio->buf, zio->dstfd, -1);
if (rc < 0) {
if (errno == EAGAIN)
return (0);
zio_debug (zio, "cbuf_read_to_fd: %s\n", strerror (errno));
return (-1);
}
if ((rc == 0) && zio_eof_pending (zio))
rc = zio_close (zio);
return (rc);
}
static int zio_writer_flush_all (zio_t *zio)
{
int n = 0;
zio_debug (zio, "zio_writer_flush_all: used=%d\n", zio_buffer_used (zio));
while (zio_buffer_used (zio) > 0) {
int rc = cbuf_read_to_fd (zio->buf, zio->dstfd, -1);
zio_debug (zio, "zio_writer_flush_all: rc=%d\n", rc);
if (rc < 0)
return (rc);
n += rc;
}
zio_debug (zio, "zio_writer_flush_all: n=%d\n", n);
if (zio_buffer_used (zio) == 0 && zio_eof_pending (zio))
zio_close (zio);
return (n);
}
static void zio_flux_read_cb (flux_reactor_t *r, flux_watcher_t *w,
int revents, void *arg)
{
zio_t *zio = arg;
int rc;
zio_handler_start (zio);
rc = zio_read_cb_common (zio);
if (rc >= 0 && zio_eof_sent (zio)) {
zio_debug (zio, "reader detaching from flux reactor\n");
flux_watcher_stop (w);
rc = zio_close (zio);
}
zio_handler_end (zio);
if (rc < 0)
flux_reactor_stop_error (r);
}
/*
* Internal function for ebzip_unzip_file() and ebzip_unzip_sebxa_start().
* If it succeeds, 0 is returned. Otherwise -1 is returned.
*/
static int
ebzip_unzip_file_internal(const char *out_file_name, const char *in_file_name,
Zio_Code in_zio_code, int index_page)
{
Zio in_zio;
unsigned char *buffer = NULL;
off_t total_length;
int out_file = -1;
ssize_t length;
struct stat in_status, out_status;
unsigned int crc = 1;
int progress_interval;
int total_slices;
int i;
zio_initialize(&in_zio);
/*
* Simply copy a file, when an input file is not compressed.
*/
if (in_zio_code == ZIO_PLAIN)
return ebzip_copy_file(out_file_name, in_file_name);
/*
* Output file name information.
*/
if (!ebzip_quiet_flag) {
fprintf(stderr, _("==> uncompress %s <==\n"), in_file_name);
fprintf(stderr, _("output to %s\n"), out_file_name);
fflush(stderr);
}
/*
* Get status of the input file.
*/
if (stat(in_file_name, &in_status) < 0 || !S_ISREG(in_status.st_mode)) {
fprintf(stderr, _("%s: no such file: %s\n"), invoked_name,
in_file_name);
goto failed;
}
/*
* Do nothing if the `in_file_name' and `out_file_name' are the same.
*/
if (is_same_file(out_file_name, in_file_name)) {
if (!ebzip_quiet_flag) {
fprintf(stderr,
_("the input and output files are the same, skipped.\n\n"));
fflush(stderr);
}
return 0;
}
/*
* Allocate memories for in/out buffers.
*/
buffer = (unsigned char *)malloc(EB_SIZE_PAGE << ZIO_MAX_EBZIP_LEVEL);
if (buffer == NULL) {
fprintf(stderr, _("%s: memory exhausted\n"), invoked_name);
goto failed;
}
/*
* If the file `out_file_name' already exists, confirm and unlink it.
*/
if (!ebzip_test_flag
&& stat(out_file_name, &out_status) == 0
&& S_ISREG(out_status.st_mode)) {
if (ebzip_overwrite_mode == EBZIP_OVERWRITE_NO) {
if (!ebzip_quiet_flag) {
fputs(_("already exists, skip the file\n\n"), stderr);
fflush(stderr);
}
return 0;
} else if (ebzip_overwrite_mode == EBZIP_OVERWRITE_CONFIRM) {
int y_or_n;
fprintf(stderr, _("\nthe file already exists: %s\n"),
out_file_name);
y_or_n = query_y_or_n(_("do you wish to overwrite (y or n)? "));
fputc('\n', stderr);
fflush(stderr);
if (!y_or_n)
return 0;
}
if (unlink(out_file_name) < 0) {
fprintf(stderr, _("%s: failed to unlink the file: %s\n"),
invoked_name, out_file_name);
goto failed;
}
}
/*
* Open files.
*/
if (zio_open(&in_zio, in_file_name, in_zio_code) < 0) {
fprintf(stderr, _("%s: failed to open the file: %s\n"),
invoked_name, in_file_name);
goto failed;
}
if (in_zio_code == ZIO_SEBXA) {
off_t index_location;
off_t index_base;
off_t zio_start_location;
off_t zio_end_location;
if (get_sebxa_indexes(in_file_name, index_page, &index_location,
&index_base, &zio_start_location, &zio_end_location) < 0) {
goto failed;
}
zio_set_sebxa_mode(&in_zio, index_location, index_base,
zio_start_location, zio_end_location);
}
if (!ebzip_test_flag) {
trap_file_name = out_file_name;
#ifdef SIGHUP
signal(SIGHUP, trap);
#endif
signal(SIGINT, trap);
#ifdef SIGQUIT
signal(SIGQUIT, trap);
#endif
#ifdef SIGTERM
signal(SIGTERM, trap);
#endif
#ifdef O_CREAT
out_file = open(out_file_name, O_CREAT | O_TRUNC | O_WRONLY | O_BINARY,
0666 ^ get_umask());
#else
out_file = creat(out_file_name, 0666 ^ get_umask());
#endif
if (out_file < 0) {
fprintf(stderr, _("%s: failed to open the file: %s\n"),
invoked_name, out_file_name);
goto failed;
}
trap_file = out_file;
}
/*
* Read a slice from the input file, uncompress it if required,
* and then write it to the output file.
*/
total_length = 0;
total_slices = (in_zio.file_size + in_zio.slice_size - 1)
/ in_zio.slice_size;
progress_interval = EBZIP_PROGRESS_INTERVAL_FACTOR;
if (((total_slices + 999) / 1000) > progress_interval)
progress_interval = ((total_slices + 999) / 1000);
for (i = 0; i < total_slices; i++) {
/*
* Read a slice.
*/
if (zio_lseek(&in_zio, total_length, SEEK_SET) < 0) {
fprintf(stderr, _("%s: failed to seek the file: %s\n"),
invoked_name, in_file_name);
goto failed;
}
length = zio_read(&in_zio, (char *)buffer, in_zio.slice_size);
if (length < 0) {
fprintf(stderr, _("%s: failed to read from the file: %s\n"),
invoked_name, in_file_name);
goto failed;
} else if (length == 0) {
fprintf(stderr, _("%s: unexpected EOF: %s\n"),
invoked_name, in_file_name);
goto failed;
} else if (length != in_zio.slice_size
&& total_length + length != in_zio.file_size) {
fprintf(stderr, _("%s: unexpected EOF: %s\n"),
invoked_name, in_file_name);
goto failed;
}
/*
* Update CRC. (Calculate adler32 again.)
*/
if (in_zio.code == ZIO_EBZIP1)
crc = adler32((uLong)crc, (Bytef *)buffer, (uInt)length);
/*
* Write the slice to `out_file'.
*/
if (!ebzip_test_flag) {
if (write(out_file, buffer, length) != length) {
fprintf(stderr, _("%s: failed to write to the file, %s: %s\n"),
invoked_name, strerror(errno), out_file_name);
goto failed;
}
}
total_length += length;
/*
* Output status information unless `quiet' mode.
*/
if (!ebzip_quiet_flag && (i + 1) % progress_interval == 0) {
#if defined(PRINTF_LL_MODIFIER)
fprintf(stderr, _("%4.1f%% done (%llu / %llu bytes)\n"),
(double) (i + 1) * 100.0 / (double) total_slices,
(unsigned long long) total_length,
(unsigned long long) in_zio.file_size);
#elif defined(PRINTF_I64_MODIFIER)
fprintf(stderr, _("%4.1f%% done (%I64u / %I64u bytes)\n"),
(double) (i + 1) * 100.0 / (double) total_slices,
(unsigned __int64) total_length,
(unsigned __int64) in_zio.file_size);
#else
fprintf(stderr, _("%4.1f%% done (%lu / %lu bytes)\n"),
(double) (i + 1) * 100.0 / (double) total_slices,
(unsigned long) total_length,
(unsigned long) in_zio.file_size);
#endif
fflush(stderr);
}
}
/*
* Output the result unless quiet mode.
*/
if (!ebzip_quiet_flag) {
#if defined(PRINTF_LL_MODIFIER)
fprintf(stderr, _("completed (%llu / %llu bytes)\n"),
(unsigned long long) in_zio.file_size,
(unsigned long long) in_zio.file_size);
#elif defined(PRINTF_I64_MODIFIER)
fprintf(stderr, _("completed (%I64u / %I64u bytes)\n"),
(unsigned __int64) in_zio.file_size,
(unsigned __int64) in_zio.file_size);
#else
fprintf(stderr, _("%lu -> %lu bytes\n\n"),
(unsigned long) in_status.st_size,
(unsigned long) total_length);
#endif
fflush(stderr);
}
/*
* Close files.
*/
zio_close(&in_zio);
zio_finalize(&in_zio);
if (!ebzip_test_flag) {
close(out_file);
out_file = -1;
trap_file = -1;
trap_file_name = NULL;
#ifdef SIGHUP
signal(SIGHUP, SIG_DFL);
#endif
signal(SIGINT, SIG_DFL);
#ifdef SIGQUIT
signal(SIGQUIT, SIG_DFL);
#endif
#ifdef SIGTERM
signal(SIGTERM, SIG_DFL);
#endif
}
/*
* Check for CRC.
*/
if (in_zio.code == ZIO_EBZIP1 && in_zio.crc != crc) {
fprintf(stderr, _("%s: CRC error: %s\n"), invoked_name, out_file_name);
goto failed;
}
/*
* Delete an original file unless the keep flag is set.
*/
if (!ebzip_test_flag && !ebzip_keep_flag)
unlink_files_add(in_file_name);
/*
* Set owner, group, permission, atime and mtime of `out_file'.
* We ignore return values of `chown', `chmod' and `utime'.
*/
if (!ebzip_test_flag) {
struct utimbuf utim;
utim.actime = in_status.st_atime;
utim.modtime = in_status.st_mtime;
utime(out_file_name, &utim);
}
/*
* Dispose memories.
*/
free(buffer);
return 0;
/*
* An error occurs...
*/
failed:
if (buffer != NULL)
free(buffer);
zio_close(&in_zio);
zio_finalize(&in_zio);
if (0 <= out_file) {
close(out_file);
trap_file = -1;
trap_file_name = NULL;
#ifdef SIGHUP
signal(SIGHUP, SIG_DFL);
#endif
signal(SIGINT, SIG_DFL);
#ifdef SIGQUIT
signal(SIGQUIT, SIG_DFL);
#endif
#ifdef SIGTERM
signal(SIGTERM, SIG_DFL);
#endif
}
fputc('\n', stderr);
fflush(stderr);
return -1;
}
