summaryrefslogtreecommitdiff
path: root/lib/tar/read_retry.c
blob: 5d0659510f421feadbb901bcdd0ec77c71e3606a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
 * read_retry.c
 *
 * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
 */
#include "config.h"

#include <unistd.h>
#include <errno.h>
#include <stdio.h>

#include "tar.h"

int read_retry(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;
}