summaryrefslogtreecommitdiff
path: root/src/shared/acl-util.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/shared/acl-util.c')
-rw-r--r--src/shared/acl-util.c429
1 files changed, 0 insertions, 429 deletions
diff --git a/src/shared/acl-util.c b/src/shared/acl-util.c
deleted file mode 100644
index 2aa951fce9..0000000000
--- a/src/shared/acl-util.c
+++ /dev/null
@@ -1,429 +0,0 @@
-/***
- 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 <errno.h>
-#include <stdbool.h>
-
-#include "acl-util.h"
-#include "alloc-util.h"
-#include "string-util.h"
-#include "strv.h"
-#include "user-util.h"
-#include "util.h"
-
-int acl_find_uid(acl_t acl, uid_t uid, acl_entry_t *entry) {
- acl_entry_t i;
- int r;
-
- assert(acl);
- assert(entry);
-
- for (r = acl_get_entry(acl, ACL_FIRST_ENTRY, &i);
- r > 0;
- r = 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 (r < 0)
- return -errno;
-
- return 0;
-}
-
-int calc_acl_mask_if_needed(acl_t *acl_p) {
- acl_entry_t i;
- int r;
- bool need = false;
-
- assert(acl_p);
-
- for (r = acl_get_entry(*acl_p, ACL_FIRST_ENTRY, &i);
- r > 0;
- r = 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 (IN_SET(tag, ACL_USER, ACL_GROUP))
- need = true;
- }
- if (r < 0)
- return -errno;
-
- if (need && acl_calc_mask(acl_p) < 0)
- return -errno;
-
- return need;
-}
-
-int add_base_acls_if_needed(acl_t *acl_p, const char *path) {
- acl_entry_t i;
- int r;
- bool have_user_obj = false, have_group_obj = false, have_other = false;
- struct stat st;
- _cleanup_(acl_freep) acl_t basic = NULL;
-
- assert(acl_p);
-
- for (r = acl_get_entry(*acl_p, ACL_FIRST_ENTRY, &i);
- r > 0;
- r = 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_USER_OBJ)
- have_user_obj = true;
- else if (tag == ACL_GROUP_OBJ)
- have_group_obj = true;
- else if (tag == ACL_OTHER)
- have_other = true;
- if (have_user_obj && have_group_obj && have_other)
- return 0;
- }
- if (r < 0)
- return -errno;
-
- r = stat(path, &st);
- if (r < 0)
- return -errno;
-
- basic = acl_from_mode(st.st_mode);
- if (!basic)
- return -errno;
-
- for (r = acl_get_entry(basic, ACL_FIRST_ENTRY, &i);
- r > 0;
- r = acl_get_entry(basic, ACL_NEXT_ENTRY, &i)) {
- acl_tag_t tag;
- acl_entry_t dst;
-
- if (acl_get_tag_type(i, &tag) < 0)
- return -errno;
-
- if ((tag == ACL_USER_OBJ && have_user_obj) ||
- (tag == ACL_GROUP_OBJ && have_group_obj) ||
- (tag == ACL_OTHER && have_other))
- continue;
-
- r = acl_create_entry(acl_p, &dst);
- if (r < 0)
- return -errno;
-
- r = acl_copy_entry(dst, i);
- if (r < 0)
- return -errno;
- }
- if (r < 0)
- return -errno;
- return 0;
-}
-
-int acl_search_groups(const char *path, char ***ret_groups) {
- _cleanup_strv_free_ char **g = NULL;
- _cleanup_(acl_free) acl_t acl = NULL;
- bool ret = false;
- acl_entry_t entry;
- int r;
-
- assert(path);
-
- acl = acl_get_file(path, ACL_TYPE_DEFAULT);
- if (!acl)
- return -errno;
-
- r = acl_get_entry(acl, ACL_FIRST_ENTRY, &entry);
- for (;;) {
- _cleanup_(acl_free_gid_tpp) gid_t *gid = NULL;
- acl_tag_t tag;
-
- if (r < 0)
- return -errno;
- if (r == 0)
- break;
-
- if (acl_get_tag_type(entry, &tag) < 0)
- return -errno;
-
- if (tag != ACL_GROUP)
- goto next;
-
- gid = acl_get_qualifier(entry);
- if (!gid)
- return -errno;
-
- if (in_gid(*gid) > 0) {
- if (!ret_groups)
- return true;
-
- ret = true;
- }
-
- if (ret_groups) {
- char *name;
-
- name = gid_to_name(*gid);
- if (!name)
- return -ENOMEM;
-
- r = strv_consume(&g, name);
- if (r < 0)
- return r;
- }
-
- next:
- r = acl_get_entry(acl, ACL_NEXT_ENTRY, &entry);
- }
-
- if (ret_groups) {
- *ret_groups = g;
- g = NULL;
- }
-
- return ret;
-}
-
-int parse_acl(const char *text, acl_t *acl_access, acl_t *acl_default, bool want_mask) {
- _cleanup_free_ char **a = NULL, **d = NULL; /* strings are not be freed */
- _cleanup_strv_free_ char **split;
- char **entry;
- int r = -EINVAL;
- _cleanup_(acl_freep) acl_t a_acl = NULL, d_acl = NULL;
-
- split = strv_split(text, ",");
- if (!split)
- return -ENOMEM;
-
- STRV_FOREACH(entry, split) {
- char *p;
-
- p = startswith(*entry, "default:");
- if (!p)
- p = startswith(*entry, "d:");
-
- if (p)
- r = strv_push(&d, p);
- else
- r = strv_push(&a, *entry);
- if (r < 0)
- return r;
- }
-
- if (!strv_isempty(a)) {
- _cleanup_free_ char *join;
-
- join = strv_join(a, ",");
- if (!join)
- return -ENOMEM;
-
- a_acl = acl_from_text(join);
- if (!a_acl)
- return -errno;
-
- if (want_mask) {
- r = calc_acl_mask_if_needed(&a_acl);
- if (r < 0)
- return r;
- }
- }
-
- if (!strv_isempty(d)) {
- _cleanup_free_ char *join;
-
- join = strv_join(d, ",");
- if (!join)
- return -ENOMEM;
-
- d_acl = acl_from_text(join);
- if (!d_acl)
- return -errno;
-
- if (want_mask) {
- r = calc_acl_mask_if_needed(&d_acl);
- if (r < 0)
- return r;
- }
- }
-
- *acl_access = a_acl;
- *acl_default = d_acl;
- a_acl = d_acl = NULL;
-
- return 0;
-}
-
-static int acl_entry_equal(acl_entry_t a, acl_entry_t b) {
- acl_tag_t tag_a, tag_b;
-
- if (acl_get_tag_type(a, &tag_a) < 0)
- return -errno;
-
- if (acl_get_tag_type(b, &tag_b) < 0)
- return -errno;
-
- if (tag_a != tag_b)
- return false;
-
- switch (tag_a) {
- case ACL_USER_OBJ:
- case ACL_GROUP_OBJ:
- case ACL_MASK:
- case ACL_OTHER:
- /* can have only one of those */
- return true;
- case ACL_USER: {
- _cleanup_(acl_free_uid_tpp) uid_t *uid_a = NULL, *uid_b = NULL;
-
- uid_a = acl_get_qualifier(a);
- if (!uid_a)
- return -errno;
-
- uid_b = acl_get_qualifier(b);
- if (!uid_b)
- return -errno;
-
- return *uid_a == *uid_b;
- }
- case ACL_GROUP: {
- _cleanup_(acl_free_gid_tpp) gid_t *gid_a = NULL, *gid_b = NULL;
-
- gid_a = acl_get_qualifier(a);
- if (!gid_a)
- return -errno;
-
- gid_b = acl_get_qualifier(b);
- if (!gid_b)
- return -errno;
-
- return *gid_a == *gid_b;
- }
- default:
- assert_not_reached("Unknown acl tag type");
- }
-}
-
-static int find_acl_entry(acl_t acl, acl_entry_t entry, acl_entry_t *out) {
- acl_entry_t i;
- int r;
-
- for (r = acl_get_entry(acl, ACL_FIRST_ENTRY, &i);
- r > 0;
- r = acl_get_entry(acl, ACL_NEXT_ENTRY, &i)) {
-
- r = acl_entry_equal(i, entry);
- if (r < 0)
- return r;
- if (r > 0) {
- *out = i;
- return 1;
- }
- }
- if (r < 0)
- return -errno;
- return 0;
-}
-
-int acls_for_file(const char *path, acl_type_t type, acl_t new, acl_t *acl) {
- _cleanup_(acl_freep) acl_t old;
- acl_entry_t i;
- int r;
-
- old = acl_get_file(path, type);
- if (!old)
- return -errno;
-
- for (r = acl_get_entry(new, ACL_FIRST_ENTRY, &i);
- r > 0;
- r = acl_get_entry(new, ACL_NEXT_ENTRY, &i)) {
-
- acl_entry_t j;
-
- r = find_acl_entry(old, i, &j);
- if (r < 0)
- return r;
- if (r == 0)
- if (acl_create_entry(&old, &j) < 0)
- return -errno;
-
- if (acl_copy_entry(j, i) < 0)
- return -errno;
- }
- if (r < 0)
- return -errno;
-
- *acl = old;
- old = NULL;
- return 0;
-}
-
-int add_acls_for_user(int fd, uid_t uid) {
- _cleanup_(acl_freep) acl_t acl = NULL;
- acl_entry_t entry;
- acl_permset_t permset;
- int r;
-
- acl = acl_get_fd(fd);
- if (!acl)
- return -errno;
-
- r = acl_find_uid(acl, uid, &entry);
- if (r <= 0) {
- if (acl_create_entry(&acl, &entry) < 0 ||
- acl_set_tag_type(entry, ACL_USER) < 0 ||
- acl_set_qualifier(entry, &uid) < 0)
- return -errno;
- }
-
- /* We do not recalculate the mask unconditionally here,
- * so that the fchmod() mask above stays intact. */
- if (acl_get_permset(entry, &permset) < 0 ||
- acl_add_perm(permset, ACL_READ) < 0)
- return -errno;
-
- r = calc_acl_mask_if_needed(&acl);
- if (r < 0)
- return r;
-
- return acl_set_fd(fd, acl);
-}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2025-01-31 21:14:41 +0000