summaryrefslogtreecommitdiff
path: root/util/sbase/sponge.c
blob: 7a0b272bd085e397b0301739821511edb77412fa (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
38
39
40
41
42
/* See LICENSE file for copyright and license details. */
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>

#include "util.h"

static void
usage(void)
{
	eprintf("usage: %s file\n", argv0);
}

int
main(int argc, char *argv[])
{
	char tmp[] = "/tmp/sponge-XXXXXX";
	int fd, tmpfd;

	ARGBEGIN {
	default:
		usage();
	} ARGEND

	if (argc != 1)
		usage();

	if ((tmpfd = mkstemp(tmp)) < 0)
		eprintf("mkstemp:");
	unlink(tmp);
	if (concat(0, "<stdin>", tmpfd, "<tmpfile>") < 0)
		return 1;
	if (lseek(tmpfd, 0, SEEK_SET) < 0)
		eprintf("lseek:");

	if ((fd = creat(argv[0], 0666)) < 0)
		eprintf("creat %s:", argv[0]);
	if (concat(tmpfd, "<tmpfile>", fd, argv[0]) < 0)
		return 1;

	return 0;
}