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author | rwatson <rwatson@FreeBSD.org> | 2000-01-15 19:44:27 +0000 |
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committer | rwatson <rwatson@FreeBSD.org> | 2000-01-15 19:44:27 +0000 |
commit | 71ddc094786915d61c422e38dab1eb7a81e25daf (patch) | |
tree | d2c3c57d694153784a717bf58e4affc29c2fd4dc /lib/libc/posix1e/acl_calc_mask.c | |
parent | 14487c9009d22779861e0407d8c028024af00311 (diff) | |
download | FreeBSD-src-71ddc094786915d61c422e38dab1eb7a81e25daf.zip FreeBSD-src-71ddc094786915d61c422e38dab1eb7a81e25daf.tar.gz |
libposix1e provides userland library calls for the POSIX.1e security
interface. This commit introduces the library, as well as a modest
subset of the ACL calls, with some modifications to support multiple
ACL semantics.
Reviewed by: eivind
Diffstat (limited to 'lib/libc/posix1e/acl_calc_mask.c')
-rw-r--r-- | lib/libc/posix1e/acl_calc_mask.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/lib/libc/posix1e/acl_calc_mask.c b/lib/libc/posix1e/acl_calc_mask.c new file mode 100644 index 0000000..30ea02e --- /dev/null +++ b/lib/libc/posix1e/acl_calc_mask.c @@ -0,0 +1,74 @@ +/*- + * Copyright (c) 1999 Robert N. M. Watson + * 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. + * + * $FreeBSD$ + */ +/* + * acl_calc_mask(): POSIX.1e routine to recalculate the mask value + */ + +#include <sys/types.h> +#include <sys/acl.h> +#include <sys/errno.h> +#include <string.h> + +#include "acl_support.h" + +/* + * POSIX.1e ACL semantics: + * + * acl_calc_mask(): calculate an ACL_MASK entry for the ACL, then either + * insert into the ACL if there is none already, or replace the existing + * one. + */ +int +acl_calc_mask(acl_t *acl_p) +{ + acl_perm_t perm_union = ACL_PERM_NONE; + acl_t acl = *acl_p; + int mask_entry = -1; + int i; + + if (!acl_posix1e(acl)) + return (0); + + /* search for ACL_MASK */ + for (i = 0; i < acl->acl_cnt; i++) + if (acl->acl_entry[i].ae_tag == ACL_MASK) + mask_entry = i; + else + perm_union |= acl->acl_entry[i].ae_perm; + + if (mask_entry != -1) { + /* already have a mask, replace */ + acl->acl_entry[mask_entry].ae_perm = perm_union; + } else { + /* must add a new mask */ + if (acl_add_entry(acl, ACL_MASK, 0, perm_union) == -1) + return (-1); + } + + return (0); +} |