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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* read_retry.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "config.h"
#include "tar.h"
#include "internal.h"
int read_retry(const char *errstr, FILE *fp, void *buffer, size_t size)
{
size_t ret;
while (size > 0) {
if (ferror(fp)) {
fprintf(stderr, "%s: error reading from file\n",
errstr);
return -1;
}
if (feof(fp)) {
fprintf(stderr, "%s: short read\n", errstr);
return -1;
}
ret = fread(buffer, 1, size, fp);
size -= ret;
buffer = (char *)buffer + ret;
}
return 0;
}
char *record_to_memory(FILE *fp, sqfs_u64 size)
{
char *buffer = malloc(size + 1);
if (buffer == NULL)
goto fail_errno;
if (read_retry("reading tar record", fp, buffer, size))
goto fail;
if (skip_padding(fp, size))
goto fail;
buffer[size] = '\0';
return buffer;
fail_errno:
perror("reading tar record");
goto fail;
fail:
free(buffer);
return NULL;
}
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