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-rw-r--r--man/tmpfiles.d.xml20
-rw-r--r--src/shared/acl-util.c102
-rw-r--r--src/shared/acl-util.h1
-rw-r--r--src/tmpfiles/tmpfiles.c25
4 files changed, 112 insertions, 36 deletions
diff --git a/man/tmpfiles.d.xml b/man/tmpfiles.d.xml
index 957910dd6d..8815bf9970 100644
--- a/man/tmpfiles.d.xml
+++ b/man/tmpfiles.d.xml
@@ -306,16 +306,16 @@
<term><varname>a</varname></term>
<term><varname>a+</varname></term>
<listitem><para>Set POSIX ACLs (access control lists). If
- suffixed with <varname>+</varname>, specified mask will be
- added to existing
- entries. <command>systemd-tmpfiles</command> does not
- automatically add the required base entries for user and
- group to the specified mask, so they must be specified
- explicitly if <varname>+</varname> is not used. The
- mask will be added if not specified explicitly.
- Lines of this type accept shell-style globs in place
- of normal path names. This can be useful for allowing
- additional access to certain files. </para></listitem>
+ suffixed with <varname>+</varname>, specified entries will
+ be added to the existing set.
+ <command>systemd-tmpfiles</command> will automatically add
+ the required base entries for user and group based on the
+ access mode of the file, unless base entries already exist
+ or are explictly specified. The mask will be added if not
+ specified explicitly or already present. Lines of this type
+ accept shell-style globs in place of normal path names. This
+ can be useful for allowing additional access to certain
+ files.</para></listitem>
</varlistentry>
<varlistentry>
diff --git a/src/shared/acl-util.c b/src/shared/acl-util.c
index 950f472ddd..a4ff1ab878 100644
--- a/src/shared/acl-util.c
+++ b/src/shared/acl-util.c
@@ -29,14 +29,14 @@
int acl_find_uid(acl_t acl, uid_t uid, acl_entry_t *entry) {
acl_entry_t i;
- int found;
+ int r;
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)) {
+ 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;
@@ -60,8 +60,7 @@ int acl_find_uid(acl_t acl, uid_t uid, acl_entry_t *entry) {
return 1;
}
}
-
- if (found < 0)
+ if (r < 0)
return -errno;
return 0;
@@ -69,14 +68,13 @@ int acl_find_uid(acl_t acl, uid_t uid, acl_entry_t *entry) {
int calc_acl_mask_if_needed(acl_t *acl_p) {
acl_entry_t i;
- int found;
+ int r;
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)) {
-
+ 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)
@@ -84,14 +82,80 @@ int calc_acl_mask_if_needed(acl_t *acl_p) {
if (tag == ACL_MASK)
return 0;
+ if (IN_SET(tag, ACL_USER, ACL_GROUP))
+ goto calc;
}
-
- if (found < 0)
+ if (r < 0)
return -errno;
+ return 0;
+calc:
if (acl_calc_mask(acl_p) < 0)
return -errno;
+ return 1;
+}
+
+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;
}
@@ -221,15 +285,15 @@ int parse_acl(char *text, acl_t *acl_access, acl_t *acl_default, bool want_mask)
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 found, r;
+ int r;
old = acl_get_file(path, type);
if (!old)
return -errno;
- for (found = acl_get_entry(new, ACL_FIRST_ENTRY, &i);
- found > 0;
- found = acl_get_entry(new, ACL_NEXT_ENTRY, &i)) {
+ 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;
@@ -239,10 +303,8 @@ int acls_for_file(const char *path, acl_type_t type, acl_t new, acl_t *acl) {
if (acl_copy_entry(j, i) < 0)
return -errno;
}
-
- r = calc_acl_mask_if_needed(&old);
if (r < 0)
- return r;
+ return -errno;
*acl = old;
old = NULL;
diff --git a/src/shared/acl-util.h b/src/shared/acl-util.h
index 1ad4a2ebc7..90e88ffa26 100644
--- a/src/shared/acl-util.h
+++ b/src/shared/acl-util.h
@@ -31,6 +31,7 @@
int acl_find_uid(acl_t acl, uid_t uid, acl_entry_t *entry);
int calc_acl_mask_if_needed(acl_t *acl_p);
+int add_base_acls_if_needed(acl_t *acl_p, const char *path);
int search_acl_groups(char*** dst, const char* path, bool* belong);
int parse_acl(char *text, acl_t *acl_access, acl_t *acl_default, bool want_mask);
int acls_for_file(const char *path, acl_type_t type, acl_t new, acl_t *acl);
diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c
index 3c8993e894..7edeeb7428 100644
--- a/src/tmpfiles/tmpfiles.c
+++ b/src/tmpfiles/tmpfiles.c
@@ -614,22 +614,35 @@ static int get_acls_from_arg(Item *item) {
}
static int path_set_acl(const char *path, acl_type_t type, acl_t acl, bool modify) {
- _cleanup_(acl_freep) acl_t cleanme = NULL;
+ _cleanup_(acl_freep) acl_t dup = NULL;
int r;
if (modify) {
- r = acls_for_file(path, type, acl, &cleanme);
+ r = acls_for_file(path, type, acl, &dup);
if (r < 0)
return r;
- acl = cleanme;
- };
- r = acl_set_file(path, type, acl);
+ r = calc_acl_mask_if_needed(&dup);
+ if (r < 0)
+ return r;
+ } else {
+ dup = acl_dup(acl);
+ if (!dup)
+ return -errno;
+
+ /* the mask was already added earlier if needed */
+ }
+
+ r = add_base_acls_if_needed(&dup, path);
+ if (r < 0)
+ return r;
+
+ r = acl_set_file(path, type, dup);
if (r < 0) {
_cleanup_(acl_free_charpp) char *t;
r = -errno;
- t = acl_to_any_text(acl, NULL, ',', TEXT_ABBREVIATE);
+ t = acl_to_any_text(dup, NULL, ',', TEXT_ABBREVIATE);
log_error_errno(r,
"Setting %s ACL \"%s\" on %s failed: %m",
type == ACL_TYPE_ACCESS ? "access" : "default",
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-10 18:35:24 +0000