busybox/archival/libunarchive/seek_by_jump.c

25 lines
570 B
C

/* vi: set sw=4 ts=4: */
/*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include <sys/types.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include "libbb.h"
#include "unarchive.h"
void seek_by_jump(const archive_handle_t *archive_handle, const unsigned int amount)
{
if (lseek(archive_handle->src_fd, (off_t) amount, SEEK_CUR) == (off_t) -1) {
#ifdef CONFIG_FEATURE_UNARCHIVE_TAPE
if (errno == ESPIPE) {
seek_by_read(archive_handle, amount);
} else
#endif
bb_perror_msg_and_die("seek failure");
}
}