bin/setfacl/file.c

   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
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  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  */
  42 acl_t
  43 get_acl_from_file(const char *filename)
  44 {
  45         FILE *file;
  46         char buf[BUFSIZ];
  47
  48         if (filename == NULL)
  49                 err(1, "(null) filename in get_acl_from_file()");
  50
  51         bzero(&buf, sizeof(buf));
  52
  53         if (strcmp(filename, "-") == 0) {
  54                 if (have_stdin != 0)
  55                         err(1, "cannot specify more than one stdin");
  56                 file = stdin;
  57                 have_stdin = 1;
  58         } else {
  59                 file = fopen(filename, "r");
  60                 if (file == NULL)
  61                         err(1, "fopen() %s failed", filename);
  62         }
  63
  64         fread(buf, sizeof(buf), (size_t)1, file);
  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 }