file.c revision 301919 
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 CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/10/bin/setfacl/file.c 301919 2016-06-15 06:33:40Z truckman $");
29
30#include <sys/types.h>
31#include <sys/acl.h>
32
33#include <err.h>
34#include <stdio.h>
35#include <string.h>
36
37#include "setfacl.h"
38
39/*
40 * read acl text from a file and return the corresponding acl
41 */
42acl_t
43get_acl_from_file(const char *filename)
44{
45	FILE *file;
46	size_t len;
47	char buf[BUFSIZ+1];
48
49	if (filename == NULL)
50		err(1, "(null) filename in get_acl_from_file()");
51
52	if (strcmp(filename, "-") == 0) {
53		if (have_stdin != 0)
54			err(1, "cannot specify more than one stdin");
55		file = stdin;
56		have_stdin = 1;
57	} else {
58		file = fopen(filename, "r");
59		if (file == NULL)
60			err(1, "fopen() %s failed", filename);
61	}
62
63	len = fread(buf, (size_t)1, sizeof(buf) - 1, file);
64	buf[len] = '\0';
65	if (ferror(file) != 0) {
66		fclose(file);
67		err(1, "error reading from %s", filename);
68	} else if (feof(file) == 0) {
69		fclose(file);
70		errx(1, "line too long in %s", filename);
71	}
72
73	fclose(file);
74
75	return (acl_from_text(buf));
76}
77