1/*	$NetBSD: file.c,v 1.1 2020/05/16 18:31:45 christos Exp $	*/
2
3/*-
4 * Copyright (c) 2001 Chris D. Faulhaber
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30#if 0
31__FBSDID("$FreeBSD: head/bin/setfacl/file.c 333065 2018-04-27 15:25:24Z emaste $");
32#else
33__RCSID("$NetBSD: file.c,v 1.1 2020/05/16 18:31:45 christos Exp $");
34#endif
35
36#include <sys/types.h>
37#include <sys/acl.h>
38
39#include <err.h>
40#include <stdio.h>
41#include <string.h>
42
43#include "setfacl.h"
44
45/*
46 * read acl text from a file and return the corresponding acl
47 */
48acl_t
49get_acl_from_file(const char *filename)
50{
51	FILE *file;
52	size_t len;
53	char buf[BUFSIZ+1];
54
55	if (filename == NULL)
56		err(1, "(null) filename in get_acl_from_file()");
57
58	if (strcmp(filename, "-") == 0) {
59		if (have_stdin)
60			err(1, "cannot specify more than one stdin");
61		file = stdin;
62		have_stdin = true;
63	} else {
64		file = fopen(filename, "r");
65		if (file == NULL)
66			err(1, "fopen() %s failed", filename);
67	}
68
69	len = fread(buf, (size_t)1, sizeof(buf) - 1, file);
70	buf[len] = '\0';
71	if (ferror(file) != 0) {
72		fclose(file);
73		err(1, "error reading from %s", filename);
74	} else if (feof(file) == 0) {
75		fclose(file);
76		errx(1, "line too long in %s", filename);
77	}
78
79	fclose(file);
80
81	return (acl_from_text(buf));
82}
83