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/* SPDX-License-Identifier: GPL-3.0-or-later */
#include "util.h"
#include <stdlib.h>
#include <stdio.h>
int padd_file(int outfd, uint64_t size, size_t blocksize)
{
size_t padd_sz = size % blocksize;
int status = -1;
uint8_t *buffer;
ssize_t ret;
if (padd_sz == 0)
return 0;
padd_sz = blocksize - padd_sz;
buffer = calloc(1, padd_sz);
if (buffer == NULL)
goto fail_errno;
ret = write_retry(outfd, buffer, padd_sz);
if (ret < 0)
goto fail_errno;
if ((size_t)ret < padd_sz)
goto fail_trunc;
status = 0;
out:
free(buffer);
return status;
fail_trunc:
fputs("padding output to block size: truncated write\n", stderr);
goto out;
fail_errno:
perror("padding output file to block size");
goto out;
}
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