busybox/archival/libunarchive/seek_by_jump.c

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/* vi: set sw=4 ts=4: */
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/*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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#include "libbb.h"
#include "unarchive.h"
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void FAST_FUNC seek_by_jump(int fd, off_t amount)
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{
if (amount
&& lseek(fd, amount, SEEK_CUR) == (off_t) -1
) {
if (errno == ESPIPE)
seek_by_read(fd, amount);
else
bb_perror_msg_and_die("seek failure");
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}
}