You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
128 lines
4.2 KiB
128 lines
4.2 KiB
From c7d4f7a5a6cef5a46f905141e2ac27da3c96d2b7 Mon Sep 17 00:00:00 2001 |
|
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl> |
|
Date: Mon, 23 Feb 2015 23:19:54 -0500 |
|
Subject: [PATCH] tmpfiles: avoid creating duplicate acl entries |
|
|
|
https://bugs.freedesktop.org/show_bug.cgi?id=89202 |
|
https://bugs.debian.org/778656 |
|
|
|
Status quo ante can be restored with: |
|
getfacl -p /var/log/journal/`cat /etc/machine-id`|grep -v '^#'|sort -u|sudo setfacl --set-file=- /var/log/journal/`cat /etc/machine-id` |
|
|
|
(cherry picked from commit 1c73f3bc29111a00738569c9d40a989b161a0624) |
|
--- |
|
src/shared/acl-util.c | 79 +++++++++++++++++++++++++++++++++++++++++-- |
|
src/shared/acl-util.h | 4 +++ |
|
2 files changed, 81 insertions(+), 2 deletions(-) |
|
|
|
diff --git a/src/shared/acl-util.c b/src/shared/acl-util.c |
|
index a4ff1ab878..cbe09d7aba 100644 |
|
--- a/src/shared/acl-util.c |
|
+++ b/src/shared/acl-util.c |
|
@@ -282,6 +282,77 @@ int parse_acl(char *text, acl_t *acl_access, acl_t *acl_default, bool want_mask) |
|
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, *uid_b; |
|
+ |
|
+ 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, *gid_b; |
|
+ |
|
+ 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; |
|
@@ -297,8 +368,12 @@ int acls_for_file(const char *path, acl_type_t type, acl_t new, acl_t *acl) { |
|
|
|
acl_entry_t j; |
|
|
|
- if (acl_create_entry(&old, &j) < 0) |
|
- return -errno; |
|
+ 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; |
|
diff --git a/src/shared/acl-util.h b/src/shared/acl-util.h |
|
index 90e88ffa26..fdb90063fa 100644 |
|
--- a/src/shared/acl-util.h |
|
+++ b/src/shared/acl-util.h |
|
@@ -41,5 +41,9 @@ int acls_for_file(const char *path, acl_type_t type, acl_t new, acl_t *acl); |
|
DEFINE_TRIVIAL_CLEANUP_FUNC(acl_t, acl_free); |
|
#define acl_free_charp acl_free |
|
DEFINE_TRIVIAL_CLEANUP_FUNC(char*, acl_free_charp); |
|
+#define acl_free_uid_tp acl_free |
|
+DEFINE_TRIVIAL_CLEANUP_FUNC(uid_t*, acl_free_uid_tp); |
|
+#define acl_free_gid_tp acl_free |
|
+DEFINE_TRIVIAL_CLEANUP_FUNC(gid_t*, acl_free_gid_tp); |
|
|
|
#endif
|
|
|