mirror of
https://github.com/morgan9e/systemd
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f76ce81b91
When the credential dir is backed by an fs that supports ACLs we must be more careful with adjusting the 'x' bit of the directory, as any chmod() call on the dir will reset the mask entry of the ACL entirely which we don't want. Hence, do a manual set of ACL changes, that only add/drop the 'x' bit but otherwise leave the ACL as it is. This matters if we use tmpfs rather than ramfs to store credentials.
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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#include <errno.h>
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#include <unistd.h>
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int fd_acl_make_read_only_fallback(int fd);
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int fd_acl_make_writable_fallback(int fd);
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#if HAVE_ACL
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#include <acl/libacl.h>
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#include <stdbool.h>
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#include <sys/acl.h>
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#include "macro.h"
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int acl_find_uid(acl_t acl, uid_t uid, acl_entry_t *entry);
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int calc_acl_mask_if_needed(acl_t *acl_p);
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int add_base_acls_if_needed(acl_t *acl_p, const char *path);
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int acl_search_groups(const char* path, char ***ret_groups);
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int parse_acl(
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const char *text,
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acl_t *ret_acl_access,
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acl_t *ret_acl_access_exec,
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acl_t *ret_acl_default,
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bool want_mask);
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int acls_for_file(const char *path, acl_type_t type, acl_t new, acl_t *ret);
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int fd_add_uid_acl_permission(int fd, uid_t uid, unsigned mask);
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int fd_acl_make_read_only(int fd);
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int fd_acl_make_writable(int fd);
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/* acl_free takes multiple argument types.
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* Multiple cleanup functions are necessary. */
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DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(acl_t, acl_free, NULL);
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#define acl_free_charp acl_free
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DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(char*, acl_free_charp, NULL);
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#define acl_free_uid_tp acl_free
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DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(uid_t*, acl_free_uid_tp, NULL);
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#define acl_free_gid_tp acl_free
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DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(gid_t*, acl_free_gid_tp, NULL);
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#else
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#define ACL_READ 0x04
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#define ACL_WRITE 0x02
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#define ACL_EXECUTE 0x01
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static inline int fd_add_uid_acl_permission(int fd, uid_t uid, unsigned mask) {
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return -EOPNOTSUPP;
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}
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static inline int fd_acl_make_read_only(int fd) {
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return fd_acl_make_read_only_fallback(fd);
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}
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static inline int fd_acl_make_writable(int fd) {
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return fd_acl_make_writable_fallback(fd);
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}
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#endif
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