file.c revision 74465 
1/*
2 * Copyright (c) 2001 Chris D. Faulhaber
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR THE VOICES IN HIS HEAD BE
18 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 * POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: head/bin/setfacl/file.c 74465 2001-03-19 18:09:25Z rwatson $
27 */
28
29#include <sys/types.h>
30#include <sys/acl.h>
31
32#include <err.h>
33#include <stdio.h>
34#include <string.h>
35#include <sysexits.h>
36
37#include "setfacl.h"
38
39/* read acl text from a file and return the corresponding acl */
40acl_t
41get_acl_from_file(const char *filename)
42{
43	FILE *file;
44	char buf[BUFSIZ];
45
46	if (!filename)
47		err(EX_USAGE, "(null) filename in get_acl_from_file()");
48
49	bzero(&buf, sizeof(buf));
50
51	if (!strcmp(filename, "-")) {
52		if (have_stdin)
53			err(EX_USAGE, "cannot specify more than one stdin");
54		file = stdin;
55		have_stdin = 1;
56	} else {
57		file = fopen(filename, "r");
58		if (!file)
59			err(EX_OSERR, "fopen() %s failed", filename);
60	}
61
62	fread(buf, sizeof(buf), 1, file);
63	if (ferror(file)) {
64		fclose(file);
65		err(EX_USAGE, "error reading from %s", filename);
66	} else if (!feof(file)) {
67		fclose(file);
68		errx(EX_USAGE, "line too long in %s", filename);
69	}
70
71	fclose(file);
72
73	return acl_from_text(buf);
74}
75