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 */
48 acl_t
get_acl_from_file(const char * filename)49 get_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