1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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/types.h>
30 #include <sys/acl.h>
31
32 #include <err.h>
33 #include <stdio.h>
34 #include <string.h>
35
36 #include "setfacl.h"
37
38 /*
39 * read acl text from a file and return the corresponding acl
40 */
41 acl_t
get_acl_from_file(const char * filename)42 get_acl_from_file(const char *filename)
43 {
44 FILE *file;
45 size_t len;
46 char buf[BUFSIZ+1];
47
48 if (filename == NULL)
49 err(1, "(null) filename in get_acl_from_file()");
50
51 if (strcmp(filename, "-") == 0) {
52 if (have_stdin)
53 err(1, "cannot specify more than one stdin");
54 file = stdin;
55 have_stdin = true;
56 } else {
57 file = fopen(filename, "r");
58 if (file == NULL)
59 err(1, "fopen() %s failed", filename);
60 }
61
62 len = fread(buf, (size_t)1, sizeof(buf) - 1, file);
63 buf[len] = '\0';
64 if (ferror(file) != 0) {
65 fclose(file);
66 err(1, "error reading from %s", filename);
67 } else if (feof(file) == 0) {
68 fclose(file);
69 errx(1, "line too long in %s", filename);
70 }
71
72 fclose(file);
73
74 return (acl_from_text(buf));
75 }
76