static ssize_t
read_read(struct archive * a, void * cookie, const void ** buffer)
{
struct multitape_read_internal * d = cookie;
ssize_t lenread;
lenread = readtape_read(d, buffer);
if (lenread < 0) {
archive_set_error(a, errno, "Error reading archive");
return (ARCHIVE_FATAL);
} else
return (lenread);
}
/*
* Read the tape and write to stdout.
*/
void
tarsnap_mode_r(struct bsdtar *bsdtar)
{
TAPE_R * d;
const void * buf;
ssize_t lenread;
size_t writelen;
/* Open the tape. */
if ((d = readtape_open(bsdtar->machinenum,
bsdtar->tapenames[0])) == NULL)
goto err1;
/* Loop until we have an error or EOF. */
do {
lenread = readtape_read(d, &buf);
/* Error? */
if (lenread < 0)
goto err2;
/* EOF? */
if (lenread == 0)
break;
/* Output data to stdout. */
writelen = (size_t)(lenread);
if (fwrite(buf, 1, writelen, stdout) != writelen)
goto err2;
} while (1);
/* We're done! Close the tape. */
if (readtape_close(d))
goto err1;
/* Success! */
return;
err2:
readtape_close(d);
err1:
/* Failure! */
bsdtar_warnc(bsdtar, 0, "Error reading archive");
exit(1);
}
