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      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
     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