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/* SPDX-License-Identifier: GPL-3.0-or-later */
#include "util.h"
#include "tar.h"
#include <stdio.h>
static int skip_bytes(int fd, uint64_t size)
{
unsigned char buffer[1024];
ssize_t ret;
size_t diff;
while (size != 0) {
diff = sizeof(buffer);
if (diff > size)
diff = size;
ret = read_retry(fd, buffer, diff);
if (ret < 0) {
perror("reading tar record data");
return -1;
}
if ((size_t)ret < diff) {
fputs("unexpected end of file\n", stderr);
return -1;
}
size -= diff;
}
return 0;
}
int skip_padding(int fd, uint64_t size)
{
size_t tail = size % 512;
return tail ? skip_bytes(fd, 512 - tail) : 0;
}
int skip_entry(int fd, uint64_t size)
{
size_t tail = size % 512;
return skip_bytes(fd, tail ? (size + 512 - tail) : size);
}
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