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 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/types.h>
  28 #include <sys/acl.h>
  29
  30 #include <err.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33
  34 #include "setfacl.h"
  35
  36 /*
  37  * read acl text from a file and return the corresponding acl
  38  */
  39 acl_t
  40 get_acl_from_file(const char *filename)
  41 {
  42         FILE *file;
  43         size_t len;
  44         char buf[BUFSIZ+1];
  45
  46         if (filename == NULL)
  47                 err(1, "(null) filename in get_acl_from_file()");
  48
  49         if (strcmp(filename, "-") == 0) {
  50                 if (have_stdin)
  51                         err(1, "cannot specify more than one stdin");
  52                 file = stdin;
  53                 have_stdin = true;
  54         } else {
  55                 file = fopen(filename, "r");
  56                 if (file == NULL)
  57                         err(1, "fopen() %s failed", filename);
  58         }
  59
  60         len = fread(buf, (size_t)1, sizeof(buf) - 1, file);
  61         buf[len] = '\0';
  62         if (ferror(file) != 0) {
  63                 fclose(file);
  64                 err(1, "error reading from %s", filename);
  65         } else if (feof(file) == 0) {
  66                 fclose(file);
  67                 errx(1, "line too long in %s", filename);
  68         }
  69
  70         fclose(file);
  71
  72         return (acl_from_text(buf));
  73 }