/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2011,2013 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <assert.h> #include <sys/acl.h> #include <acl/libacl.h> #include <errno.h> #include <stdbool.h> #include "acl-util.h" #include "util.h" #include "strv.h" int acl_find_uid(acl_t acl, uid_t uid, acl_entry_t *entry) { acl_entry_t i; int found; assert(acl); assert(entry); for (found = acl_get_entry(acl, ACL_FIRST_ENTRY, &i); found > 0; found = acl_get_entry(acl, ACL_NEXT_ENTRY, &i)) { acl_tag_t tag; uid_t *u; bool b; if (acl_get_tag_type(i, &tag) < 0) return -errno; if (tag != ACL_USER) continue; u = acl_get_qualifier(i); if (!u) return -errno; b = *u == uid; acl_free(u); if (b) { *entry = i; return 1; } } if (found < 0) return -errno; return 0; } int calc_acl_mask_if_needed(acl_t *acl_p) { acl_entry_t i; int found; assert(acl_p); for (found = acl_get_entry(*acl_p, ACL_FIRST_ENTRY, &i); found > 0; found = acl_get_entry(*acl_p, ACL_NEXT_ENTRY, &i)) { acl_tag_t tag; if (acl_get_tag_type(i, &tag) < 0) return -errno; if (tag == ACL_MASK) return 0; } if (found < 0) return -errno; if (acl_calc_mask(acl_p) < 0) return -errno; return 0; } int search_acl_groups(char*** dst, const char* path, bool* belong) { acl_t acl; assert(path); assert(belong); acl = acl_get_file(path, ACL_TYPE_DEFAULT); if (acl) { acl_entry_t entry; int r; r = acl_get_entry(acl, ACL_FIRST_ENTRY, &entry); while (r > 0) { acl_tag_t tag; gid_t *gid; char *name; r = acl_get_tag_type(entry, &tag); if (r < 0) break; if (tag != ACL_GROUP) goto next; gid = acl_get_qualifier(entry); if (!gid) break; if (in_gid(*gid) > 0) { *belong = true; break; } name = gid_to_name(*gid); if (!name) { acl_free(acl); return log_oom(); } r = strv_push(dst, name); if (r < 0) { free(name); acl_free(acl); return log_oom(); } next: r = acl_get_entry(acl, ACL_NEXT_ENTRY, &entry); } acl_free(acl); } return 0; }