69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <assert.h>
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#include <sys/acl.h>
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#include <acl/libacl.h>
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#include <errno.h>
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#include <stdbool.h>
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#include "acl-util.h"
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int acl_find_uid(acl_t acl, uid_t uid, acl_entry_t *entry) {
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acl_entry_t i;
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int found;
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assert(acl);
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assert(entry);
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for (found = acl_get_entry(acl, ACL_FIRST_ENTRY, &i);
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found > 0;
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found = acl_get_entry(acl, ACL_NEXT_ENTRY, &i)) {
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acl_tag_t tag;
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uid_t *u;
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bool b;
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if (acl_get_tag_type(i, &tag) < 0)
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return -errno;
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if (tag != ACL_USER)
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continue;
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u = acl_get_qualifier(i);
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if (!u)
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return -errno;
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b = *u == uid;
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acl_free(u);
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if (b) {
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*entry = i;
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return 1;
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}
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}
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if (found < 0)
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return -errno;
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return 0;
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}
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