build-sys: move acl searching code into libsystemd-acl

This loop over acls is a bit too much to keep inside
of another loop.

3 files changed, 67 insertions, 49 deletions

diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c
index 4c288f3334..8543adfb8a 100644
--- a/src/journal/journalctl.c
+++ b/src/journal/journalctl.c
@@ -37,6 +37,7 @@
 
 #ifdef HAVE_ACL
 #include <sys/acl.h>
+#include "acl-util.h"
 #endif
 
 #include <systemd/sd-journal.h>
@@ -895,62 +896,18 @@ static int access_check(void) {
         if (!arg_quiet && geteuid() != 0) {
                 _cleanup_strv_free_ char **g = NULL;
                 bool have_access;
-                acl_t acl;
                 int r;
 
                 have_access = in_group("systemd-journal") > 0;
-                if (!have_access) {
 
+                if (!have_access) {
                         /* Let's enumerate all groups from the default
                          * ACL of the directory, which generally
                          * should allow access to most journal
                          * files too */
-
-                        acl = acl_get_file("/var/log/journal/", ACL_TYPE_DEFAULT);
-                        if (acl) {
-                                acl_entry_t entry;
-
-                                r = acl_get_entry(acl, ACL_FIRST_ENTRY, &entry);
-                                while (r > 0) {
-                                        acl_tag_t tag;
-                                        gid_t *gid;
-                                        char *name;
-
-                                        r = acl_get_tag_type(entry, &tag);
-                                        if (r < 0)
-                                                break;
-
-                                        if (tag != ACL_GROUP)
-                                                goto next;
-
-                                        gid = acl_get_qualifier(entry);
-                                        if (!gid)
-                                                break;
-
-                                        if (in_gid(*gid) > 0) {
-                                                have_access = true;
-                                                break;
-                                        }
-
-                                        name = gid_to_name(*gid);
-                                        if (!name) {
-                                                acl_free(acl);
-                                                return log_oom();
-                                        }
-
-                                        r = strv_push(&g, name);
-                                        if (r < 0) {
-                                                free(name);
-                                                acl_free(acl);
-                                                return log_oom();
-                                        }
-
-                                next:
-                                        r = acl_get_entry(acl, ACL_NEXT_ENTRY, &entry);
-                                }
-
-                                acl_free(acl);
-                        }
+                        r = search_acl_groups(&g, "/var/log/journal/", &have_access);
+                        if (r < 0)
+                                return r;
                 }
 
                 if (!have_access) {
diff --git a/src/shared/acl-util.c b/src/shared/acl-util.c
index d1eb6f2268..48bb12f46b 100644
--- a/src/shared/acl-util.c
+++ b/src/shared/acl-util.c
@@ -3,7 +3,7 @@
 /***
   This file is part of systemd.
 
-  Copyright 2011 Lennart Poettering
+  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
@@ -26,6 +26,8 @@
 #include <stdbool.h>
 
 #include "acl-util.h"
+#include "util.h"
+#include "strv.h"
 
 int acl_find_uid(acl_t acl, uid_t uid, acl_entry_t *entry) {
         acl_entry_t i;
@@ -66,3 +68,59 @@ int acl_find_uid(acl_t acl, uid_t uid, acl_entry_t *entry) {
 
         return 0;
 }
+
+int search_acl_groups(char*** dst, const char* path, bool* belong) {
+        acl_t acl;
+
+        assert(path);
+        assert(belong);
+
+        acl = acl_get_file(path, ACL_TYPE_DEFAULT);
+        if (acl) {
+                acl_entry_t entry;
+                int r;
+
+                r = acl_get_entry(acl, ACL_FIRST_ENTRY, &entry);
+                while (r > 0) {
+                        acl_tag_t tag;
+                        gid_t *gid;
+                        char *name;
+
+                        r = acl_get_tag_type(entry, &tag);
+                        if (r < 0)
+                                break;
+
+                        if (tag != ACL_GROUP)
+                                goto next;
+
+                        gid = acl_get_qualifier(entry);
+                        if (!gid)
+                                break;
+
+                        if (in_gid(*gid) > 0) {
+                                *belong = true;
+                                break;
+                        }
+
+                        name = gid_to_name(*gid);
+                        if (!name) {
+                                acl_free(acl);
+                                return log_oom();
+                        }
+
+                        r = strv_push(dst, name);
+                        if (r < 0) {
+                                free(name);
+                                acl_free(acl);
+                                return log_oom();
+                        }
+
+                next:
+                        r = acl_get_entry(acl, ACL_NEXT_ENTRY, &entry);
+                }
+
+                acl_free(acl);
+        }
+
+        return 0;
+}
diff --git a/src/shared/acl-util.h b/src/shared/acl-util.h
index 31fbbcd510..23090d9984 100644
--- a/src/shared/acl-util.h
+++ b/src/shared/acl-util.h
@@ -21,4 +21,7 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
+#include <stdbool.h>
+
 int acl_find_uid(acl_t acl, uid_t uid, acl_entry_t *entry);
+int search_acl_groups(char*** dst, const char* path, bool* belong);