summaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
authorZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2015-01-18 05:02:47 -0500
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2015-01-22 01:14:53 -0500
commit50d9e46dbb8400d4570781728c63b151d9ca982b (patch)
treec628f4011aaa45315d20106f6f78eb74e127b8b9 /src
parentb705ab6a838937f947216af7b2d1fffb00f8b0dc (diff)
tmpfiles: implement augmenting of existing ACLs
This is much more useful in practice (equivalent to setfacl -m).
Diffstat (limited to 'src')
-rw-r--r--src/shared/acl-util.c49
-rw-r--r--src/shared/acl-util.h3
-rw-r--r--src/tmpfiles/tmpfiles.c54
3 files changed, 79 insertions, 27 deletions
diff --git a/src/shared/acl-util.c b/src/shared/acl-util.c
index 22bb8444e5..950f472ddd 100644
--- a/src/shared/acl-util.c
+++ b/src/shared/acl-util.c
@@ -150,7 +150,7 @@ int search_acl_groups(char*** dst, const char* path, bool* belong) {
return 0;
}
-int parse_acl(char *text, acl_t *acl_access, acl_t *acl_default) {
+int parse_acl(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;
@@ -187,9 +187,11 @@ int parse_acl(char *text, acl_t *acl_access, acl_t *acl_default) {
if (!a_acl)
return -EINVAL;
- r = calc_acl_mask_if_needed(&a_acl);
- if (r < 0)
- return r;
+ if (want_mask) {
+ r = calc_acl_mask_if_needed(&a_acl);
+ if (r < 0)
+ return r;
+ }
}
if (!strv_isempty(d)) {
@@ -203,9 +205,11 @@ int parse_acl(char *text, acl_t *acl_access, acl_t *acl_default) {
if (!d_acl)
return -EINVAL;
- r = calc_acl_mask_if_needed(&d_acl);
- if (r < 0)
- return r;
+ if (want_mask) {
+ r = calc_acl_mask_if_needed(&d_acl);
+ if (r < 0)
+ return r;
+ }
}
*acl_access = a_acl;
@@ -213,3 +217,34 @@ int parse_acl(char *text, acl_t *acl_access, acl_t *acl_default) {
a_acl = d_acl = NULL;
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 found, 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)) {
+
+ acl_entry_t j;
+
+ if (acl_create_entry(&old, &j) < 0)
+ return -errno;
+
+ if (acl_copy_entry(j, i) < 0)
+ return -errno;
+ }
+
+ r = calc_acl_mask_if_needed(&old);
+ if (r < 0)
+ return r;
+
+ *acl = old;
+ old = NULL;
+ return 0;
+}
diff --git a/src/shared/acl-util.h b/src/shared/acl-util.h
index 4133214d25..1ad4a2ebc7 100644
--- a/src/shared/acl-util.h
+++ b/src/shared/acl-util.h
@@ -32,7 +32,8 @@
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 search_acl_groups(char*** dst, const char* path, bool* belong);
-int parse_acl(char *text, acl_t *acl_access, acl_t *acl_default);
+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);
/* acl_free takes multiple argument types.
* Multiple cleanup functions are necessary. */
diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c
index 44a087807e..3c8993e894 100644
--- a/src/tmpfiles/tmpfiles.c
+++ b/src/tmpfiles/tmpfiles.c
@@ -600,7 +600,9 @@ static int get_acls_from_arg(Item *item) {
assert(item);
- r = parse_acl(item->argument, &item->acl_access, &item->acl_default);
+ /* If force (= modify) is set, we will not modify the acl
+ * afterwards, so the mask can be added now if necessary. */
+ r = parse_acl(item->argument, &item->acl_access, &item->acl_default, !item->force);
if (r < 0)
log_warning_errno(errno, "Failed to parse ACL \"%s\": %m. Ignoring",
item->argument);
@@ -611,6 +613,32 @@ static int get_acls_from_arg(Item *item) {
return 0;
}
+static int path_set_acl(const char *path, acl_type_t type, acl_t acl, bool modify) {
+ _cleanup_(acl_freep) acl_t cleanme = NULL;
+ int r;
+
+ if (modify) {
+ r = acls_for_file(path, type, acl, &cleanme);
+ if (r < 0)
+ return r;
+ acl = cleanme;
+ };
+
+ r = acl_set_file(path, type, acl);
+ if (r < 0) {
+ _cleanup_(acl_free_charpp) char *t;
+
+ r = -errno;
+ t = acl_to_any_text(acl, NULL, ',', TEXT_ABBREVIATE);
+ log_error_errno(r,
+ "Setting %s ACL \"%s\" on %s failed: %m",
+ type == ACL_TYPE_ACCESS ? "access" : "default",
+ strna(t), path);
+ }
+
+ return r;
+}
+
static int path_set_acls(Item *item, const char *path) {
#ifdef HAVE_ACL
int r;
@@ -619,27 +647,15 @@ static int path_set_acls(Item *item, const char *path) {
assert(path);
if (item->acl_access) {
- r = acl_set_file(path, ACL_TYPE_ACCESS, item->acl_access);
- if (r < 0) {
- _cleanup_(acl_free_charpp) char *t;
-
- t = acl_to_any_text(item->acl_access, NULL, ',', TEXT_ABBREVIATE);
- return log_error_errno(errno,
- "Setting access ACL \"%s\" on %s failed: %m",
- strna(t), path);
- }
+ r = path_set_acl(path, ACL_TYPE_ACCESS, item->acl_access, item->force);
+ if (r < 0)
+ return r;
}
if (item->acl_default) {
- r = acl_set_file(path, ACL_TYPE_DEFAULT, item->acl_default);
- if (r < 0) {
- _cleanup_(acl_free_charpp) char *t;
-
- t = acl_to_any_text(item->acl_default, NULL, ',', TEXT_ABBREVIATE);
- return log_error_errno(errno,
- "Setting default ACL \"%s\" on %s failed: %m",
- strna(t), path);
- }
+ r = path_set_acl(path, ACL_TYPE_DEFAULT, item->acl_default, item->force);
+ if (r < 0)
+ return r;
}
#endif