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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* read_data.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "config.h"
#include <unistd.h>
#include <errno.h>
#include <stdio.h>
#include "util.h"
int read_data(const char *errstr, int fd, void *buffer, size_t size)
{
ssize_t ret;
while (size > 0) {
ret = read(fd, buffer, size);
if (ret < 0) {
if (errno == EINTR)
continue;
perror(errstr);
return -1;
}
if (ret == 0) {
fprintf(stderr, "%s: short read\n", errstr);
return -1;
}
size -= ret;
buffer = (char *)buffer + ret;
}
return 0;
}
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