diff options
Diffstat (limited to 'bin/setfacl/mask.c')
| -rw-r--r-- | bin/setfacl/mask.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/bin/setfacl/mask.c b/bin/setfacl/mask.c new file mode 100644 index 0000000..05007a1 --- /dev/null +++ b/bin/setfacl/mask.c @@ -0,0 +1,114 @@ +/*- + * Copyright (c) 2001-2002 Chris D. Faulhaber + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/acl.h> +#include <sys/stat.h> + +#include <err.h> +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> + +#include "setfacl.h" + +/* set the appropriate mask the given ACL's */ +int +set_acl_mask(acl_t *prev_acl, const char *filename) +{ + acl_entry_t entry; + acl_t acl; + acl_tag_t tag; + int entry_id; + + entry = NULL; + + /* + * ... if a mask entry is specified, then the permissions of the mask + * entry in the resulting ACL shall be set to the permissions in the + * specified ACL mask entry. + */ + if (have_mask) + return (0); + + acl = acl_dup(*prev_acl); + if (acl == NULL) + err(1, "%s: acl_dup() failed", filename); + + if (n_flag == 0) { + /* + * If no mask entry is specified and the -n option is not + * specified, then the permissions of the resulting ACL mask + * entry shall be set to the union of the permissions + * associated with all entries which belong to the file group + * class in the resulting ACL + */ + if (acl_calc_mask(&acl)) { + warn("%s: acl_calc_mask() failed", filename); + acl_free(acl); + return (-1); + } + } else { + /* + * If no mask entry is specified and the -n option is + * specified, then the permissions of the resulting ACL + * mask entry shall remain unchanged ... + */ + + entry_id = ACL_FIRST_ENTRY; + + while (acl_get_entry(acl, entry_id, &entry) == 1) { + entry_id = ACL_NEXT_ENTRY; + if (acl_get_tag_type(entry, &tag) == -1) + err(1, "%s: acl_get_tag_type() failed", + filename); + + if (tag == ACL_MASK) { + acl_free(acl); + return (0); + } + } + + /* + * If no mask entry is specified, the -n option is specified, + * and no ACL mask entry exists in the ACL associated with the + * file, then write an error message to standard error and + * continue with the next file. + */ + warnx("%s: warning: no mask entry", filename); + acl_free(acl); + return (0); + } + + acl_free(*prev_acl); + *prev_acl = acl_dup(acl); + acl_free(acl); + + return (0); +} |
