From: Djalal Harouni <tixxdz@opendz.org>
Date: Mon, 18 Aug 2014 14:38:03 +0000 (+0100)
Subject: test: add helpers for user namespace mapping
X-Git-Tag: upstream/0.20140911.160207utc~29
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=52f8384912ac5a3d79e2599be3de4914483aa9f6;p=platform%2Fcore%2Fsystem%2Fkdbus-bus.git

test: add helpers for user namespace mapping

Will be used by other tests.

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>
---

diff --git a/test/kdbus-util.c b/test/kdbus-util.c
index a979c99..e59254d 100644
--- a/test/kdbus-util.c
+++ b/test/kdbus-util.c
@@ -795,3 +795,53 @@ int drop_privileges(uid_t uid, gid_t gid)
 
 	return ret;
 }
+
+static int do_userns_map_id(pid_t pid,
+			    const char *map_file,
+			    const char *map_id)
+{
+	int ret;
+	int fd;
+
+	fd = open(map_file, O_RDWR);
+	if (fd < 0) {
+		ret = -errno;
+		fprintf(stderr, "error open %s: %d (%m)\n",
+			map_file, ret);
+		return ret;
+	}
+
+	ret = write(fd, map_id, strlen(map_id));
+	if (ret < 0) {
+		ret = -errno;
+		fprintf(stderr, "error write to %s: %d (%m)\n",
+			map_file, ret);
+		goto out;
+	}
+
+	ret = 0;
+
+out:
+	close(fd);
+	return ret;
+}
+
+int userns_map_uid_gid(pid_t pid,
+		       const char *map_uid,
+		       const char *map_gid)
+{
+	int ret;
+	char file_id[128] = {'\0'};
+
+	snprintf(file_id, sizeof(file_id), "/proc/%ld/uid_map",
+		 (long) pid);
+
+	ret = do_userns_map_id(pid, file_id, map_uid);
+	if (ret < 0)
+		return ret;
+
+	snprintf(file_id, sizeof(file_id), "/proc/%ld/gid_map",
+		 (long) pid);
+
+	return do_userns_map_id(pid, file_id, map_gid);
+}
diff --git a/test/kdbus-util.h b/test/kdbus-util.h
index 5ecab2f..765f6af 100644
--- a/test/kdbus-util.h
+++ b/test/kdbus-util.h
@@ -29,6 +29,9 @@
 	     (uint8_t *)(item) < (uint8_t *)(head) + (head)->size;	\
 	     item = KDBUS_ITEM_NEXT(item))
 
+/* Dump as user of process, useful for user namespace testing */
+#define SUID_DUMP_USER	1
+
 struct conn {
 	int fd;
 	uint64_t id;
@@ -67,3 +70,7 @@ int conn_update_policy(struct conn *conn, const char *name,
 void add_match_empty(int fd);
 
 int drop_privileges(uid_t uid, gid_t gid);
+
+int userns_map_uid_gid(pid_t pid,
+		       const char *map_uid,
+		       const char *map_gid);